Solid-liquid separation device for coal-containing wastewater

Abstract

This utility model belongs to the technical field of solid-liquid separation devices, specifically providing a solid-liquid separation device for coal-containing wastewater. It includes a tank and a stirring assembly. The tank has an outer cylinder connected to an inlet pipe and a first drain pipe. A second drain pipe is located at the bottom of the tank, and an outlet is located at the top. In use, coal-containing wastewater is transported to the outer cylinder through the inlet pipe. Large coal particles settle below the inlet and are discharged through the first drain pipe. Smaller coal particles and water flow upwards under the stirring of the stirring blades and flocculate into clumps under the action of flocculants and other agents. These clumps settle to the bottom of the treatment chamber through the space between the inner wall of the treatment chamber and the outer wall of the outer cylinder, and are discharged through the second drain pipe. This application uses a vertical tank for water treatment, resulting in a smaller footprint. The stirring assembly forcibly agitates the water, accelerating the formation of small-gap, high-density particles from loose flocs, which then settle rapidly, leading to higher treatment efficiency.

Description

Technical Field

[0001] This application belongs to the technical field of solid-liquid separation devices, and more specifically, relates to a solid-liquid separation device for coal-containing wastewater. Background Technology

[0002] Coal-fired power plants require large amounts of flushing water for their coal conveying systems, trestle bridges, ground surfaces, dust suppression spray systems at the heads of coal conveyor belts, and dust collectors, resulting in significant amounts of coal-containing wastewater. This wastewater contains a large amount of coal dust particles. To improve water resource utilization and comply with relevant environmental regulations, companies purify the coal-containing wastewater so that the water can be reused for flushing the coal conveying system.

[0003] Traditional coal-containing wastewater treatment methods in thermal power plants involve sedimentation. This involves transporting the wastewater to a sedimentation tank, adding flocculants to cause the coal dust to flocculate and settle to the bottom. This sedimentation method requires a large area and relies on the natural sedimentation of the coal dust under gravity after adding flocculants, resulting in a long treatment cycle. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a solid-liquid separation device for coal-containing wastewater to solve the technical problems of large footprint and long sedimentation time in existing coal-containing wastewater treatment equipment.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a solid-liquid separation device for coal-containing wastewater, comprising:

[0006] A tank body has an internal processing chamber. An outer cylinder is coaxially arranged within the processing chamber. The top of the outer cylinder is open. The tank body has a water outlet located above the outer cylinder. The bottom of the outer cylinder has a funnel-shaped water inlet. The water inlet is connected to an inlet pipe and a first drain pipe, which is located below the inlet pipe. Both the first drain pipe and the inlet pipe penetrate the side wall of the tank body and extend to the outside of the tank body. The tank body also has a second drain pipe communicating with the bottom of the processing chamber.

[0007] The stirring assembly includes a transmission rod, stirring blades, and a drive mechanism. The transmission rod is coaxially arranged in the tank from top to bottom, and at least a portion of the transmission rod is housed in the outer cylinder. The stirring blades are disposed on the transmission rod housed in the outer cylinder. The drive mechanism is disposed in the tank and is connected to the transmission rod in a driving connection.

[0008] In one possible implementation, the bottom of the processing chamber is funnel-shaped, the lower part of the transmission rod passes through the outer cylinder and extends to the bottom of the processing chamber, and the stirring assembly further includes a sludge scraping mechanism located at the lower part of the transmission rod.

[0009] In one possible implementation, the sludge scraping mechanism includes a plurality of sludge scraping blades arranged along the circumferential direction of the transmission rod, the sludge scraping blades being in contact with the bottom wall of the processing chamber.

[0010] In one possible implementation, the top of the tank is formed around the processing chamber to form a water outlet chamber, an overflow weir is provided between the water outlet chamber and the processing chamber, and the water outlet chamber has the water outlet.

[0011] In one possible implementation, the overflow weir is a triangular overflow weir.

[0012] In one possible implementation, the tank body is further provided with an inner cylinder, which is coaxially disposed inside the outer cylinder. The top of the inner cylinder is lower than the top of the outer cylinder, and the bottom of the inner cylinder is higher than the water inlet.

[0013] In one possible implementation, the water inlet pipe is connected to a chemical dosing pipe.

[0014] In one possible implementation, the water inlet pipe is arranged along the tangential direction of the water inlet section.

[0015] In one possible implementation, the driving mechanism is a drive motor, and the output shaft of the drive motor is connected to the transmission rod via a connecting rod.

[0016] In one possible implementation, the stirring blades are arranged in multiple sets at intervals along the height direction of the transmission rod, and each set of stirring blades has multiple sets arranged along the circumferential direction of the transmission rod.

[0017] Compared with the prior art, the beneficial effects of the coal-containing wastewater solid-liquid separation device provided in this application are:

[0018] The solid-liquid separation device for coal-containing wastewater provided in this application includes a tank and a stirring assembly. The tank contains an outer cylinder connected to an inlet pipe and a first drain pipe. A second drain pipe is located at the bottom of the tank, and an outlet is located at the top. The stirring assembly drives the stirring blades to rotate, agitating the water inside the outer cylinder. In use, the coal-containing wastewater is transported to the outer cylinder through the inlet pipe. Large coal particles settle to the bottom of the inlet and are discharged through the first drain pipe. Small coal particles and water flow upwards under the agitation of the stirring blades and flocculate into clumps under the action of flocculants and other agents. These clumps settle to the bottom of the treatment chamber through the space between the inner wall of the treatment chamber and the outer wall of the outer cylinder and are discharged through the second drain pipe. The clean water is discharged to the outside through the outlet at the top.

[0019] Compared with the existing technology of using sedimentation tanks to treat coal-containing wastewater, the treatment process in this application is carried out in a vertical tank, which occupies less space. The agitator is used to forcefully stir the water, which promotes the loose flocculent matter to form small-gap, high-density particles and settle quickly, resulting in higher treatment efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the solid-liquid separation device for coal-containing wastewater provided in the embodiments of this application;

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0023] Figure 3 A schematic cross-sectional view of the coal-containing wastewater solid-liquid separation device provided in the embodiments of this application at the inlet pipe position;

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Tank body; 11. Outer cylinder; 111. Water inlet; 12. Water inlet pipe; 121. Chemical dosing pipe; 13. First drain pipe; 14. Second drain pipe; 15. Water outlet chamber; 151. Water outlet; 16. Triangular overflow weir; 17. Inner cylinder; 20. Agitator assembly; 21. Transmission rod; 22. Agitator blades; 23. Drive mechanism; 24. Sludge scraping mechanism; 241. Sludge scraper. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0029] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0031] Please refer to the following: Figures 1 to 3 The solid-liquid separation device for coal-containing wastewater provided in the embodiments of this application will be described below.

[0032] The solid-liquid separation device for coal-containing wastewater provided in this embodiment includes a tank 10 and a stirring assembly 20. A processing chamber is formed inside the tank 10, and an outer cylinder 11 is coaxially arranged inside the processing chamber. The top of the outer cylinder 11 is open, and an outlet 151 is provided in the tank 10 at a position higher than the outer cylinder 11. The bottom of the outer cylinder 11 has a funnel-shaped inlet 111, which is connected to an inlet pipe 12 and a first drain pipe 13. The first drain pipe 13 is located below the inlet pipe 12. Water pipes 12 pass through the side walls of tank 10 and extend to the outside of tank 10. Tank 10 is provided with a second drain pipe 14 that communicates with the bottom of the treatment chamber. The stirring assembly 20 includes a transmission rod 21, stirring blades 22 and a drive mechanism 23. The transmission rod 21 is coaxially arranged inside tank 10 from top to bottom. At least part of the transmission rod 21 is housed inside the outer cylinder 11. The stirring blades 22 are arranged on the transmission rod 21 housed inside the outer cylinder 11. The drive mechanism 23 is located in tank 10 and is connected to the transmission rod 21 in a transmission manner.

[0033] Compared with the prior art, the beneficial effects of the coal-containing wastewater solid-liquid separation device provided in this application embodiment are:

[0034] The solid-liquid separation device for coal-containing wastewater provided in this embodiment includes a tank 10 and a stirring assembly 20. The tank 10 has an outer cylinder 11 inside, connected to an inlet pipe 12 and a first drain pipe 13. A second drain pipe 14 is located at the bottom of the tank 10, and an outlet 151 is located at the top. The stirring assembly 20 drives the stirring blades 22 to rotate, agitating the water inside the outer cylinder 11. In use, the coal-containing wastewater is transported to the outer cylinder 11 through the inlet pipe 12. Large coal particles settle below the inlet 111 and are discharged through the first drain pipe 13. Small coal particles and water flow upwards under the agitation of the stirring blades 22 and flocculate into clumps under the action of flocculants and other agents. These clumps settle to the bottom of the treatment chamber from the space between the inner wall of the treatment chamber and the outer wall of the outer cylinder 11 and are discharged through the second drain pipe 14. The clean water is discharged to the outside through the outlet 151 at the top.

[0035] Compared with the existing technology of using sedimentation tanks to treat coal-containing wastewater, the solid-liquid separation process of this application embodiment is carried out in a vertical tank 10, which occupies less space. The stirring component 20 is used to forcefully agitate the water, which promotes the loose flocculent matter to form particles with small gaps and high density and settle quickly, resulting in higher treatment efficiency.

[0036] The tank body 10 is made entirely of stainless steel. The tank body 10 is usually cylindrical, but it can also be square or other shapes.

[0037] The tank body 10 has a hollow interior forming a processing chamber. The outer cylinder 11 is fixed inside the processing chamber by connecting rods and other components, and is coaxially arranged with the processing chamber. The bottom of the outer cylinder 11 is a water inlet 111, which has a funnel-shaped constricted structure and is connected to an inlet pipe 12 and a first drain pipe 13. Large coal dust or granules will settle directly to the bottom of the water inlet 111 and can be discharged through the first drain pipe 13. To prevent the water flow from interfering with the sludge settling at the bottom of the water inlet 111, the inlet pipe 12 should be located above the first drain pipe 13.

[0038] Coal-containing wastewater is transported using power equipment such as mud pumps. Before the wastewater is transported into the tank 10, chemicals can be added to it. These chemicals can be existing flocculants, coagulants, etc. There are no specific restrictions on the type, dosage, or inlet pressure of the chemicals; users can set these parameters according to their own circumstances.

[0039] like Figure 1As shown by the middle arrow, the coal-containing wastewater flows upward after entering the inlet section 111. During the flow, the coal powder gradually forms flocs, which are then agitated by the stirring blades 22 to form denser flocs. Subsequently, the flocs settle from the space between the outer cylinder 11 and the inner wall of the tank 10. The sludge at the bottom of the treatment chamber can be discharged through the second drain pipe 14, while the clean water is discharged through the outlet 151 at the top of the tank 10.

[0040] Electric drain valves can be installed on both the first drain pipe 13 and the second drain pipe 14 to control the discharge of sewage.

[0041] The mixing assembly 20 includes a transmission rod 21, a mixing blade 22, and a drive mechanism 23. The drive mechanism 23 is a drive motor. The output shaft of the drive motor is connected to the transmission rod 21 through a connecting rod, a coupling, and other transmission components. The connecting rod can be a liftable rod to facilitate the adjustment of the height of the sludge scraping mechanism 24, so that the sludge scraper 241 fits against the bottom wall of the processing chamber, compensating for height errors caused by manufacturing precision.

[0042] The stirring blades 22 can be rod-shaped, paddle-shaped, or any other shape that can agitate the water. The stirring blades 22 are fixed by welding, screws, or other methods. Multiple sets of stirring blades 22 are spaced along the height of the transmission rod 21, and each set of stirring blades 22 has multiple blades arranged along the circumference of the transmission rod 21. There are no specific limitations on the rotational speed range, tilt angle, or other parameters of the stirring blades 22; users can choose and set them according to their actual needs.

[0043] Please see Figure 1 and Figure 2 To facilitate the discharge of sludge from the bottom of the treatment chamber, the bottom of the treatment chamber is funnel-shaped, specifically it can be conical or arc-shaped. The lower part of the transmission rod 21 passes through the outer cylinder 11 and extends to the bottom of the treatment chamber. The stirring assembly 20 also includes a sludge scraping mechanism 24 located at the lower part of the transmission rod 21, which can scrape off the sludge from the bottom of the treatment chamber.

[0044] The sludge scraping mechanism 24 includes a plurality of scraper blades 241 arranged along the circumference of the transmission rod 21. The shape of the scraper blades 241 is adapted to the bottom shape of the processing chamber to ensure that the scraper blades 241 can fit against the bottom wall of the processing chamber. The scraper blades 241 can be connected to the transmission rod 21 by welding, bolting, or other means.

[0045] Please see Figure 1 The top of the tank body 10 surrounds the treatment chamber to form an outlet chamber 15. An overflow weir is provided between the outlet chamber 15 and the treatment chamber. The outlet chamber 15 has an outlet 151. The overflow weir can make the water flow more smoothly. Specifically, the overflow weir can be a triangular overflow weir 16 or other types of overflow weirs.

[0046] Please see Figure 1The tank body 10 is also provided with an inner cylinder 17, which is coaxially arranged inside the outer cylinder 11. The top of the inner cylinder 17 is lower than the top of the outer cylinder 11, and the bottom of the inner cylinder 17 is higher than the water inlet 111. Some of the stirring blades 22 are housed in the inner cylinder 17. Larger coal powder particles can settle from the cavity between the inner cylinder 17 and the outer cylinder 11 to the bottom of the water inlet 111 and be discharged through the first drain pipe 13.

[0047] During operation, large coal dust particles settle directly to the bottom of the water inlet 111. Larger coal dust particles first flow upward with the water flow to the top of the inner cylinder 17, and then settle to the bottom of the water inlet 111 from the cavity between the inner cylinder 17 and the outer cylinder 11. Small coal dust particles settle from between the outer cylinder 11 and the inner wall of the treatment chamber to the bottom of the treatment chamber.

[0048] Please see Figure 1 and Figure 2 The water inlet pipe 12 is connected to a chemical dosing pipe 121, through which flocculants, coagulants and other chemicals can be added.

[0049] Please see Figure 3 The water inlet pipe 12 is set along the tangential direction of the water inlet section 111. Tangential water inlet can generate swirling flow to settle large particles in the coal powder, and can also promote the flocculant and other agents to fully mix with the coal powder in the water to form flocs, so that the coal powder separation is more thorough.

[0050] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A solid-liquid separation device for coal-containing wastewater, characterized by comprising: include: A tank (10) has a processing chamber inside, and an outer cylinder (11) is coaxially arranged inside the processing chamber. The top of the outer cylinder (11) is open, and the tank (10) has a water outlet (151) at a position higher than the outer cylinder (11). The bottom of the outer cylinder (11) has a funnel-shaped water inlet (111), and the water inlet (111) is connected to a water inlet pipe (12) and a first drain pipe (13). The first drain pipe (13) is located below the water inlet pipe (12). The first drain pipe (13) and the water inlet pipe (12) respectively penetrate the side wall of the tank (10) and extend to the outside of the tank (10). The tank (10) has a second drain pipe (14) that communicates with the bottom of the processing chamber. The stirring assembly (20) includes a transmission rod (21), stirring blades (22), and a drive mechanism (23). The transmission rod (21) is coaxially arranged inside the tank (10) from top to bottom, and at least part of the transmission rod (21) is housed inside the outer cylinder (11). The stirring blades (22) are arranged on the transmission rod (21) housed inside the outer cylinder (11). The drive mechanism (23) is located in the tank (10) and is connected to the transmission rod (21) in a transmission connection.

2. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The bottom of the processing chamber is funnel-shaped, and the lower part of the transmission rod (21) passes through the outer cylinder (11) and extends to the bottom of the processing chamber. The stirring assembly (20) also includes a sludge scraping mechanism (24) located at the lower part of the transmission rod (21).

3. The coal-containing wastewater solid-liquid separation device according to claim 2, characterized in that, The sludge scraping mechanism (24) includes a plurality of sludge scraping plates (241) arranged along the circumferential direction of the transmission rod (21), and the sludge scraping plates (241) are in contact with the bottom wall of the processing chamber.

4. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The top of the tank (10) is surrounded by the processing chamber to form a water outlet chamber (15), and an overflow weir is provided between the water outlet chamber (15) and the processing chamber. The water outlet chamber (15) is provided with the water outlet (151).

5. The coal-containing wastewater solid-liquid separation device according to claim 4, characterized in that, The overflow weir is a triangular overflow weir (16).

6. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The tank (10) is also provided with an inner cylinder (17), which is coaxially disposed inside the outer cylinder (11). The top of the inner cylinder (17) is lower than the top of the outer cylinder (11), and the bottom of the inner cylinder (17) is higher than the water inlet (111).

7. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The water inlet pipe (12) is connected to the chemical dosing pipe (121).

8. The coal-containing wastewater solid-liquid separation device according to claim 1 or 7, characterized in that, The water inlet pipe (12) is arranged along the tangential direction of the water inlet section (111).

9. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The drive mechanism (23) is a drive motor, and the output shaft of the drive motor is connected to the transmission rod (21) through a connecting rod.

10. The coal-containing wastewater solid-liquid separation device according to claim 1, characterized in that, The stirring blades (22) are arranged in multiple groups at intervals along the height direction of the transmission rod (21), and each group of stirring blades (22) is arranged in multiple groups along the circumferential direction of the transmission rod (21).

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