Mixing and settling device for slime water treatment

Abstract

The utility model relates to the technical field of slime water treatment, in particular to a mixing and settling device for slime water treatment, which comprises a mixing reaction mechanism, a screen mechanism, a settling mechanism and a sludge outlet mechanism, the mixing reaction mechanism comprises a reaction barrel and a vortex-shaped guide plate in the reaction barrel, and a barrel cover and the side wall of the reaction barrel are respectively provided with a chemical inlet and a material inlet; the bottom of the reaction barrel is communicated with the settling barrel through a spiral discharge pipe; the settling mechanism comprises a settling barrel and a water pumping opening, and the water inlet end of the water pumping opening is arranged in the settling barrel and located above the screen; and the sludge discharging mechanism comprises a spiral blade, a sludge outlet and a sludge discharging pump. According to the utility model, the spiral vortex-shaped guide plate and the staggered side baffle plates are arranged, and the spiral discharge pipe and the discharge baffle plates are combined, so that slime water and medicaments are fully mixed, stirred and reacted in the conveying process; by arranging a plurality of densimeters, the density of liquid at each position in the settling vat is monitored in real time, so that adjustment is automatically made according to the actual settling condition, and the settling efficiency and effect are improved.

Description

Technical Field

[0001] This utility model relates to the field of coal slurry water treatment, and in particular to a mixing and settling device for coal slurry water treatment. Background Technology

[0002] In slurry treatment, settling is a crucial step. Traditional slurry settling devices often have several shortcomings, such as low mixing and reaction between the slurry and reagents, resulting in poor settling effect; low settling efficiency, requiring a long time for effective separation of solid particles from the slurry; poor adaptability to slurries with different concentrations and particle size distributions, leading to unsatisfactory settling results when processing complex slurries; and the tendency for slurry blockage during settling, affecting the quality of the final product and subsequent processing steps. Furthermore, most existing settling devices and schemes rely on manual observation and control or timed discharge methods, resulting in low separation efficiency and difficulty in guaranteeing satisfactory settling effects. Utility Model Content

[0003] This utility model aims to solve the above problems and provides a mixing and settling device for coal slurry water treatment, the technical solution of which is as follows:

[0004] A mixing and settling device for coal slurry water treatment includes a mixing reaction mechanism, a screen mechanism, a settling mechanism, and a sludge discharge mechanism arranged sequentially from top to bottom. The mixing reaction mechanism includes a reaction tank and a vortex guide plate inside it. A tank cover is provided on the top of the reaction tank. A chemical inlet and a feed inlet are respectively provided on the tank cover and the side wall of the reaction tank. The vortex guide plate extends spirally inward from the side wall of the reaction tank, and the lower surface of the side baffle is in close contact with the bottom surface of the reaction tank. The bottom of the reaction tank is connected to the settling tank through a spiral discharge pipe. The screen mechanism is set inside the settling mechanism and includes a screen and a screen fixing frame. The screen is used to isolate the slurry below it, and the screen is fixedly connected to the reaction tank by the screen fixing frame. The settling mechanism includes a settling tank and a water inlet. The bottom of the settling tank is conical, and the water inlet of the water inlet is located inside the settling tank and above the screen. The sludge discharge mechanism is used to discharge the high-concentration slurry from the bottom of the settling tank.

[0005] Based on the above scheme, the vortex guide plate protrudes to the side to form a side baffle. The angle between the side baffle and the extension direction of the vortex guide plate is an acute angle, and the lower surface of the vortex guide plate is in close contact with the bottom surface of the reaction tank.

[0006] Based on the above scheme, the side baffle is fixedly connected to the inner and outer sides of the vortex guide plate, and the side baffles connected to the two layers of vortex guide plates are arranged alternately in the gap formed between the two adjacent layers of vortex guide plates.

[0007] Preferably, the bottom surface of the reaction vessel is a conical surface, and the spiral discharge pipe is located at the center of the bottom of the conical surface.

[0008] Preferably, a discharge baffle is provided inside the spiral discharge pipe. One side of the discharge baffle is tightly fitted to the inner wall of the spiral discharge pipe, and the chord length of the other side is smaller than the diameter at the connection position with the spiral discharge pipe. There are multiple discharge baffles, which are distributed along the extension direction of the spiral discharge pipe, and the projections of adjacent discharge baffles on the length direction of the spiral discharge pipe overlap.

[0009] Preferably, the spiral discharge pipe has a variable pitch structure, with the pitch increasing in the direction away from the reaction vessel; the outer diameter of the spiral discharge pipe gradually decreases in the direction away from the reaction vessel, and the bottom end of the spiral discharge pipe is set in a vertically downward direction.

[0010] Preferably, the sludge discharge mechanism includes a spiral blade, a sludge discharge port, and a sludge discharge pump. The spiral blade is located at the center of the bottom of the settling tank and is driven and rotated by the blade stirring pump. The sludge inlet of the sludge discharge port is located at the bottom of the spiral blade.

[0011] Preferably, the system further includes a lifting mechanism, which includes a fixed guide rail, a lifting motor, a lifting wheel, a lifting belt, and a lifting sliding frame. The fixed guide rail is vertically arranged on the side of the settling mechanism. The lifting wheel is rotatably arranged on the fixed guide rail and is driven and rotated by the lifting motor. The lifting belt is sleeved on the lifting wheel and moves with it. The lifting sliding frame is installed on the lifting belt and moves up and down with it. The lifting sliding frame is fixedly connected to the reaction tank.

[0012] Preferably, the settling mechanism further includes a level gauge and a density gauge. The level gauge is a non-contact sensor and is installed above the settling tank. The density gauge consists of three units, including a first density gauge, a second density gauge, and a third density gauge arranged vertically from top to bottom, respectively located above the screen, in the middle of the settling tank, and at the bottom of the settling tank.

[0013] Preferably, the water inlet end of the water pump moves synchronously with the screen.

[0014] The beneficial effects of this utility model are as follows: by setting a spiral vortex guide plate and staggered side baffles, combined with a spiral discharge pipe and discharge baffles, the coal slurry and reagents are fully mixed and reacted during the transportation process; by setting a screen to block the slurry below the middle of the settling tank, the flow area of ​​the slurry is reduced, and the settling is accelerated; by setting a lifting mechanism, the height of the mixing reaction mechanism and the screen mechanism can be adapted to different coal slurry input volumes, and the height of the pumping port can be adjusted according to the actual volume of the suspension in the settling tank to meet the requirements of different settling conditions; by setting multiple densitometers to monitor the liquid density at various positions in the settling tank in real time, adjustments can be made automatically according to the actual settling conditions, thereby improving the settling efficiency and effect. Attached Figure Description

[0015] Figure 1: A schematic diagram of the structure of this utility model;

[0016] Figure 2 : Cross-sectional view of the internal structure of this utility model;

[0017] Figure 3 : Schematic diagram of the mixing reaction mechanism and sieve mechanism of this utility model;

[0018] Figure 4 : Schematic diagram of the assembly structure of the vortex guide plate and spiral discharge pipe of this utility model;

[0019] Figure 5 Top view of the vortex guide plate of this utility model;

[0020] Figure 6 : Schematic diagram of the internal structure of the spiral discharge pipe of this utility model;

[0021] Figure 7 : Schematic diagram of the distribution of the discharge baffles in the spiral discharge pipe of this utility model;

[0022] Figure 8 : Schematic diagram of the installation state of the density meter of this utility model;

[0023] Figure 9 : Schematic diagram of the mud discharge mechanism of this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] In the description of this utility model, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," and "inner," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] like Figure 1 and Figure 2 As shown, a slurry and reagent mixing and settling device includes a mixing and reaction mechanism, a screen mechanism, a settling mechanism and a sludge discharge mechanism arranged sequentially from top to bottom.

[0029] like Figures 3 to 5As shown, the mixing reaction mechanism includes a reaction tank 11 and a vortex guide plate 15 inside it. A tank cover 12 is provided on the top of the reaction tank 11. A drug inlet 13 and a feed inlet 14 are respectively provided on the tank cover 12 and the side wall of the reaction tank 11 for introducing the reagent and coal slurry water into the tank. The drug inlet 13 is located near the side wall and the feed inlet 14. The vortex guide plate 15 extends spirally inward from the side wall of the reaction tank 11. The vortex guide plate 15 protrudes to the side to form a side baffle 16. There is a gap between the end of the side baffle 16 and the adjacent vortex guide plate 15 to facilitate the passage of liquid. The angle between the extension direction of the side baffle 16 and the vortex guide plate 15 is an acute angle, which can both block the liquid and form multiple continuous local vortices near the side baffle 16 to improve the stirring effect and enable the reagent and the substances in the coal slurry water to be fully mixed and reacted, while also ensuring the smooth flow of the mixed liquid and not affecting the settling efficiency. Preferably, the side baffles 16 are fixedly connected to the inner and outer sides of the vortex guide plate 15, and the side baffles 16 connected to the two layers of vortex guide plates 15 are staggered within the gap formed between adjacent layers of vortex guide plates 15, thereby improving the stirring and mixing effect. The lower surfaces of both the vortex guide plate 15 and the side baffles 16 are in close contact with the bottom surface of the reaction vessel 11, so that the input mixed liquid can only flow out from the end of the vortex guide plate 15 through the channel formed by the complete vortex guide plate 15, ensuring the mixing and reaction effect.

[0030] like Figure 6As shown, the bottom of the reaction tank 11 is connected to the settling tank 31 via a spiral discharge pipe 17. Preferably, the bottom surface of the reaction tank 11 is conical, and the spiral discharge pipe 17 is located at the center of the bottom of the conical surface, thus facilitating the outward discharge of liquid from the reaction tank 11 through the spiral discharge pipe 17. The spiral discharge pipe 17 has a variable pitch structure, with the pitch increasing in the direction away from the reaction tank 11; the outer diameter of the spiral discharge pipe 17 gradually decreases in the direction away from the reaction tank 11, and the bottom end of the spiral discharge pipe 17 is set in a vertically downward direction. Through the above structure, firstly, the flow path of the liquid is extended, and the stirring and mixing effect is improved through the spiral path; secondly, the smooth discharge of the liquid is ensured without affecting the settling efficiency; and thirdly, the vertical discharge path at the end minimizes the generation of large eddies after the mixed liquid enters the settling tank 31, reducing disturbance and improving the settling efficiency and effect. A discharge baffle 18 is provided inside the spiral discharge pipe 17. One side of the discharge baffle 18 is tightly fitted to the inner wall of the spiral discharge pipe 17, and the chord length of the other side is smaller than the diameter at its connection point with the spiral discharge pipe 17. By setting the discharge baffle 18, it can both block the liquid and form multiple continuous local eddies near the location of the discharge baffle 18, improving the stirring effect and ensuring that the reagent and the substances in the coal slurry are fully mixed and reacted. At the same time, it can also ensure the smooth flow of the mixed liquid and not affect the settling efficiency. There are multiple discharge baffles 18, which are distributed along the extension direction of the spiral discharge pipe 17. The projections of adjacent discharge baffles 18 on the length direction of the spiral discharge pipe 17 may have overlapping areas, or there may be no overlapping areas. Figure 7 As shown.

[0031] like Figure 2 and Figure 3 As shown, the screen mechanism is installed inside the settling mechanism and includes a screen 22 and a screen fixing frame 21. The screen 22 is used to isolate the slurry on its lower side, and the screen 22 is fixedly connected to the reaction tank 11 through the screen fixing frame 21.

[0032] like Figure 2 and Figure 3 As shown, the sedimentation mechanism includes a sedimentation tank 31 and a water inlet 32. The bottom of the sedimentation tank 31 is conical. The water inlet 32 ​​is located inside the sedimentation tank 31 and above the screen 22. The water inlet 32 ​​is connected to a water pump to draw the suspension above the screen 22 outward. Preferably, the water inlet 32 ​​is fixedly connected to the screen 22 and moves synchronously with the screen 22.

[0033] The settling mechanism also includes a level gauge 33 and a density meter 34. The level gauge 33 is a non-contact sensor and is installed above the settling tank 31. There are three density meters 34. Figure 8As shown, it includes a first density meter, a second density meter, and a third density meter arranged vertically from top to bottom, respectively located above the screen 22, in the middle of the settling tank 31, and at the bottom of the settling tank 31.

[0034] like Figure 2 and Figure 9 As shown, the sludge discharge mechanism includes a spiral blade 41, a sludge discharge port 43, and a sludge discharge pump 44. The spiral blade 41 is located at the center of the bottom of the settling tank 31 and is driven and rotated by the blade stirring pump 42. The sludge inlet of the sludge discharge port 43 is located at the bottom of the spiral blade 41. The stirring of the spiral blade 41 prevents coal sludge from clogging at the bottom of the settling tank 31, thereby improving the discharge efficiency.

[0035] like Figure 1 As shown, it also includes a lifting mechanism, which includes a fixed guide rail 51, a lifting motor 52, a lifting wheel 53, a lifting belt 54, and a lifting sliding frame 55. The fixed guide rail 51 is arranged vertically on the side of the settling mechanism. The lifting wheel 53 is rotatably mounted on the fixed guide rail 51 and is driven and rotated by the lifting motor 52. The lifting belt 54 is sleeved on the lifting wheel 53 and moves with it. The lifting sliding frame 55 is mounted on the lifting belt 54 and moves up and down with it. The lifting sliding frame 55 is fixedly connected to the reaction tank 11, so that the lifting and lowering of the mixing reaction mechanism and the screen mechanism are controlled by the action of the lifting motor 52.

[0036] The operating method of the above-mentioned slurry and reagent mixing and settling device includes the following steps:

[0037] S1. Coal slurry to be treated and settled is introduced into the reaction tank 11 through the feed inlet 14, and reagents for reacting with the slurry in the coal slurry are introduced into the reaction tank 11 through the reagent inlet 13.

[0038] S2. The coal slurry and the reagent flow inward along the spiral path of the vortex guide plate 15, and a local vortex is generated at the side baffle 16 during the flow to stir them.

[0039] S3. The mixed liquid after the coal slurry water and the reagent are mixed and reacted is discharged into the settling tank 31 through the spiral discharge pipe 17. During the process, a local vortex is generated at the discharge baffle 18 for further stirring.

[0040] S4. After the mixed liquid enters the settling tank 31, it is allowed to settle and separate into layers from top to bottom: suspension, low-concentration slurry and high-concentration slurry.

[0041] S5. The suspension spreads upward through the screen 22 and is discharged outward through the water outlet 32 ​​by the water pump; the high-concentration slurry is discharged outward from the bottom of the settling tank 31 by the mud discharge mechanism.

[0042] S6. The level gauge 33 monitors the liquid level in the settling tank 31 in real time. When the liquid level of the mixed liquid is lower than the predetermined value, the above steps S1 to S5 are repeated to carry out cyclic mixing and settling.

[0043] After the mixed liquid enters the settling tank 31 and completes the predetermined settling time, different operational actions are performed based on the measurement results of the density meter 34:

[0044] A1. When the first densitometer detects that the density of the liquid above the screen 22 is less than the density of the predetermined suspension to be discharged, the water pump starts and discharges the suspension above the screen 22 to the outside.

[0045] A2. When the third density meter detects that the liquid density at the bottom of the settling tank 31 is greater than the density of the high-concentration slurry to be discharged, the blade agitator pump 42 and the mud pump 44 are started to discharge the high-concentration slurry through the mud outlet 43.

[0046] A3. When the third density meter detects that the liquid density at the bottom of the settling tank 31 is less than the density of the high-concentration slurry to be discharged, and the liquid level in the settling tank 31 is lower than the maximum limit, a new mixed liquid is injected into the settling tank 31 through the reaction tank 11 to carry out a new round of settling.

[0047] A4. When the third densitometer detects that the liquid density at the bottom of the settling tank 31 is less than the density of the high-concentration slurry to be discharged, and at the same time the second densitometer detects that the liquid density in the middle of the settling tank 31 is less than the density of the suspension to be discharged, the screen 22 moves down to the second densitometer, the water pump starts, and the suspension above the second densitometer is discharged outward; new mixed liquid is injected into the settling tank 31 through the reaction tank 11 to carry out a new round of settling.

[0048] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A mixing and settling device for coal slurry water treatment, characterized in that, The system includes a mixing and reaction mechanism, a screen mechanism, a sedimentation mechanism, and a sludge discharge mechanism arranged sequentially from top to bottom. The mixing and reaction mechanism includes a reaction tank (11) and a vortex guide plate (15) inside it. A tank cover (12) is provided on the top of the reaction tank (11). A drug inlet (13) and a feed inlet (14) are respectively provided on the tank cover (12) and the side wall of the reaction tank (11). The vortex guide plate (15) extends spirally inward from the side wall of the reaction tank (11), and the lower surface of the side baffle (16) is in close contact with the bottom surface of the reaction tank (11). The bottom of the reaction tank (11) is connected by a spiral discharge pipe (17). It is connected to the settling tank (31); the screen mechanism is set inside the settling mechanism, including a screen (22) and a screen fixing frame (21). The screen (22) is used to isolate the slurry on its lower side. The screen (22) is fixedly connected to the reaction tank (11) through the screen fixing frame (21); the settling mechanism includes a settling tank (31) and a water inlet (32). The bottom of the settling tank (31) is conical. The water inlet of the water inlet (32) is set inside the settling tank (31) and above the screen (22); the sludge discharge mechanism is used to discharge the high-concentration slurry at the bottom of the settling tank (31).

2. The mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The vortex guide plate (15) protrudes to the side to form a side baffle (16). The angle between the side baffle (16) and the extension direction of the vortex guide plate (15) is an acute angle, and the lower surface of the vortex guide plate (15) is in close contact with the bottom surface of the reaction tank (11).

3. A mixing and settling device for coal slurry water treatment according to claim 2, characterized in that, The side baffle (16) is fixedly connected to the inner and outer sides of the vortex guide plate (15), and the side baffles (16) connected to the two vortex guide plates (15) are staggered in the gap formed between the two adjacent vortex guide plates (15).

4. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The bottom surface of the reaction vessel (11) is conical, and the spiral discharge pipe (17) is located at the center of the bottom of the conical surface.

5. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The spiral discharge pipe (17) is provided with a discharge baffle (18). One side of the discharge baffle (18) is tightly fitted with the inner wall of the spiral discharge pipe (17), and the chord length of the other side is smaller than the diameter at the connection position with the spiral discharge pipe (17). There are multiple discharge baffles (18), which are distributed along the extension direction of the spiral discharge pipe (17). The projections of adjacent discharge baffles (18) in the length direction of the spiral discharge pipe (17) have overlapping areas.

6. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The spiral discharge pipe (17) has a variable pitch structure, with the pitch increasing in the direction away from the reaction tank (11); the outer diameter of the spiral discharge pipe (17) gradually decreases in the direction away from the reaction tank (11), and the bottom end of the spiral discharge pipe (17) is set in the vertically downward direction.

7. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The mud discharge mechanism includes a spiral blade (41), a mud discharge port (43), and a mud discharge pump (44). The spiral blade (41) is located at the center of the bottom of the settling tank (31) and is driven and rotated by the blade stirring pump (42). The mud inlet end of the mud discharge port (43) is located at the bottom of the spiral blade (41).

8. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, It also includes a lifting mechanism, which includes a fixed guide rail (51), a lifting motor (52), a lifting wheel (53), a lifting belt (54), and a lifting sliding frame (55). The fixed guide rail (51) is arranged vertically on the side of the settling mechanism. The lifting wheel (53) is rotatably arranged on the fixed guide rail (51) and is driven and rotated by the lifting motor (52). The lifting belt (54) is sleeved on the lifting wheel (53) and moves with it. The lifting sliding frame (55) is installed on the lifting belt (54) and moves up and down with it. The lifting sliding frame (55) is fixedly connected to the reaction tank (11).

9. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The settling mechanism also includes a level gauge (33) and a density gauge (34). The level gauge (33) is a non-contact sensor and is set above the settling tank (31). There are three density gauges (34), including a first density gauge, a second density gauge and a third density gauge arranged vertically from top to bottom, respectively set above the screen (22), in the middle of the settling tank (31) and at the bottom of the settling tank (31).

10. A mixing and settling device for coal slurry water treatment according to claim 1, characterized in that, The water inlet of the pump (32) moves synchronously with the screen (22).

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