A coal-containing wastewater sedimentation separation system

Abstract

The application discloses a coal-containing wastewater precipitation separation system, which comprises an electric control box, a liquid medicament storage tank and a medicament stirring tank, a first flocculation zone and a second flocculation zone are arranged on one side of the liquid medicament storage tank and the medicament stirring tank, a coal-containing wastewater inlet pipeline and a connecting pipeline are arranged in the first flocculation zone, a liquid medicament transmission pipeline is arranged in the liquid medicament storage tank, a slurry deposition device is arranged below the first flocculation zone, a auger conveying pipeline leading to the outside of the tank is arranged in the slurry deposition device, a mixer is arranged in the coal-containing wastewater inlet pipeline, a clean water drainage pipe is arranged in the tank of the second flocculation zone, a deposition tank is arranged at the bottom of the tank, and the deposition tank is connected with the first flocculation zone through a slurry backflow pipe. Through the improved design of the product, the product has the technical advantages of short technological process, good treatment effect, small land occupation, stable effluent, high automation degree and realization of unattended continuous operation.

Description

Technical Field

[0001] This invention relates to the field of coal-containing wastewater treatment technology, and more specifically, to a coal-containing wastewater sedimentation and separation system. Background Technology

[0002] Currently, in coal preparation plants, coal-fired power plants, and other coal-related production operations, in order to prevent dust generation from the coal conveying system and maintain a good working environment, in addition to dust control facilities, it is also necessary to regularly flush coal conveying bridges, transfer stations, coal bunkers, coal mill rooms, and other areas with water. This flushing process generates a large amount of coal-containing wastewater. If the coal-containing wastewater generated during production is not properly treated, it will lead to water waste and serious environmental pollution, and will also have a certain impact on the normal production operations of the producers. Therefore, the treatment of coal-containing wastewater is one of the key issues that coal-fired power plants must address in their normal production operations.

[0003] Coal-containing wastewater contains large coal particles, a large amount of suspended solids, and high color, exhibiting high turbidity. It also contains significant amounts of coal slime and silt. The solid particles are mostly negatively charged, and the repulsive force between like charges keeps these particles dispersed in the water. Influenced by gravity and Brownian motion, the properties of coal-containing wastewater are quite complex, exhibiting not only suspension but also colloidal properties. This wastewater cannot be directly discharged or recycled; it requires appropriate treatment to meet the water quality requirements for reuse.

[0004] However, existing coal-containing wastewater sedimentation and separation systems have complex processes, low efficiency, and insufficient automation. They also suffer from technical problems such as high water content after treatment, weak shock resistance, and unstable effluent. In addition, coal mining wastewater from underground coal mines, drilling wastewater from drilling rigs, and coal washing wastewater from coal washing plants also face the problems of difficult treatment, high treatment costs, and limited space. Summary of the Invention

[0005] In view of the above-mentioned technical problems in related technologies, the present invention proposes a coal-containing wastewater sedimentation and separation system, which can overcome the above-mentioned shortcomings of the prior art.

[0006] To achieve the above-mentioned technical objectives, the technical solution of the present invention is implemented as follows: A sedimentation and separation system for coal-containing wastewater; The coal-containing wastewater sedimentation and separation system includes an electrical control box. A liquid reagent storage tank and a reagent stirring tank are provided on one side of the electrical control box. A first flocculation zone and a second flocculation zone are provided sequentially on the side of the liquid reagent storage tank and the reagent stirring tank away from the electrical control box. The first flocculation zone is equipped with a coal-containing wastewater inlet pipe and a connecting pipe that connects to the second flocculation zone. The liquid agent storage tank is equipped with a liquid agent transmission pipe that connects to the coal-containing wastewater inlet pipe. A mud sedimentation device is set below the first flocculation zone. The mud sedimentation device is equipped with an auger conveying pipe that leads to the outside of the tank. A mixer is set inside the coal-containing wastewater inlet pipe. The second flocculation zone is equipped with a clean water drain pipe, and a sedimentation tank is provided at the bottom of the second flocculation zone. The sedimentation tank is connected to the first flocculation zone through a mud return pipe, and a mud pump is provided on the mud return pipe.

[0007] Furthermore, the clean water drain pipe includes a liquid outlet pipe, on which several upward-facing liquid outlet inlets are evenly distributed. The liquid outlet pipe is equipped with a filter brush, which is a fiber filter brush.

[0008] Furthermore, the second flocculation zone is provided with a first spray pipe and a second spray pipe. The ends of the first spray pipe and the second spray pipe extending out of the second flocculation zone are each provided with a manual valve. The first spray pipe and the second spray pipe are respectively provided with a plurality of first spray ports and a plurality of second spray ports.

[0009] Furthermore, the sedimentation tank is an inverted trapezoidal groove, and a manual valve is provided at one end of the mud return pipe extending out of the second flocculation zone. Several mud return branch pipes are provided on the main pipe of the mud return pipe, and the mud return branch pipes are located inside the sedimentation tank.

[0010] Furthermore, an auger motor is provided at the top of the auger conveying pipe, a small auger is connected below the top of the auger conveying pipe, a compression device is provided at the mud outlet of the small auger, and a first vibrator is provided on the side wall of the compression device; a clean water circulation pipe is provided between the second flocculation zone and the agent mixing tank, and a clean water circulation solenoid valve is provided on the clean water circulation pipe.

[0011] Furthermore, the connecting pipe includes an L-shaped pipe body and a horizontally placed pipe body perpendicular to the L-shaped pipe body. The top surface of the L-shaped pipe body is provided with a plurality of connecting pipe inlets, and the side surface of the horizontally placed pipe body is provided with a plurality of connecting pipe outlets. The connecting pipe inlets are located in the first flocculation zone, and the connecting pipe outlets are located in the second flocculation zone.

[0012] Furthermore, the auger conveying pipe has several drainage holes on the portion of the pipe above the top surface of the second flocculation zone, and a drainage zone is provided on the top surface of the second flocculation zone. The drainage zone and the second flocculation zone are connected by a drainage pipe for backflow.

[0013] Furthermore, a liquid pump is provided above the agent mixing tank, a dosing pump and an inverted bucket-shaped solid agent storage tank are provided above the liquid agent storage tank, and a second vibrator is provided on the side wall of the solid agent storage tank; a first flow controller and a second flow controller are provided at one end of the coal-containing wastewater inlet pipe.

[0014] Furthermore, the electrical control box is equipped with an electrically controlled automatic dosing device and a starter connected to the liquid agent storage tank and the agent mixing tank. A level gauge is provided above the liquid agent storage tank. Extraction and metering devices are provided above the liquid agent storage tank, the agent mixing tank, and the second flocculation zone. A stirring pump extending into the tank body is provided above the agent mixing tank.

[0015] Furthermore, both the liquid medicine storage tank and the medicine mixing tank are equipped with a high-level manual drain port and a low-level manual drain port on their outer walls.

[0016] The beneficial effects of this invention are as follows: Through the optimized and improved design of the product of this invention, natural gravity sedimentation and flocculation treatment are effectively combined, and secondary sedimentation, flocculation and compression of sediment are achieved. The treated water in the system is also recycled and reused, thereby achieving the technical effects of improving operation efficiency, increasing automation, effectively reducing the moisture content of peat, and improving the impact resistance of peat. In addition, the product of this invention also has the technical advantages of short process flow, good treatment effect, small footprint, stable effluent, high degree of automation, and the ability to achieve unattended continuous operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of a coal-containing wastewater sedimentation and separation system according to an embodiment of the present invention; Figure 2 This is a sedimentation and separation system for coal-containing wastewater according to an embodiment of the present invention. Figure 1 Detailed view of point A in the middle; In the diagram: 1. Electrical control box; 2. Liquid reagent storage tank; 3. Reagent mixing tank; 4. Slurry sedimentation device; 5. First extraction and metering device; 6. Mixing pump; 7. Clean water circulation pipeline; 8. Coal-containing wastewater inlet pipeline; 9. Liquid reagent transmission pipeline; 10. Solid reagent storage tank; 11. Slurry pump; 12. First flocculation zone; 13. Second flocculation zone; 14. First vibrator; 15. Screw conveying pipeline; 16. Compression device; 17. Drainage zone; 18. Liquid outlet pipeline; 19. Filter brush; 20. Liquid outlet pipeline inlet; 21. Drainage... 21. Pipeline; 22. Sedimentation tank; 23. Connecting pipe; 24. Connecting pipe inlet; 25. Connecting pipe outlet; 26. First spray pipe; 27. First spray nozzle; 28. Second spray pipe; 29. ​​Second spray nozzle; 30. High-level manual drain port; 31. Low-level manual drain port; 32. Mud return pipe; 33. Mud return branch pipe; 34. Screw motor; 35. Clean water circulation solenoid valve; 36. Starter; 37. Level gauge; 38. First flow controller; 39. Second flow controller; 40. Dosing pump; 41. Liquid pump. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0020] It should be understood that in the description of the embodiments of the present invention, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. 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, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of the present invention, "several" means two or more, unless otherwise explicitly specified.

[0021] like Figure 1As shown, a coal-containing wastewater sedimentation and separation system according to an embodiment of the present invention includes an electrical control box 1. A liquid reagent storage tank 2 and a reagent stirring tank 3 are provided on one side of the electrical control box 1. A first flocculation zone 12 and a second flocculation zone 13 are provided sequentially on the side of the liquid reagent storage tank 2 and the reagent stirring tank 3 away from the electrical control box 1. The first flocculation zone 12 is equipped with a coal-containing wastewater inlet pipe 8 and a connecting pipe 23 that connects to the second flocculation zone 13. The liquid agent storage tank 2 is equipped with a liquid agent transmission pipe 9 that connects to the coal-containing wastewater inlet pipe 8. A mud sedimentation device 4 is installed below the first flocculation zone 12. The mud sedimentation device 4 is equipped with a screw conveyor pipe 15 that leads to the outside of the tank. The coal-containing wastewater inlet pipe 8 is equipped with a mixer, which is used to mix the coal-containing wastewater and liquid agent in the pipe evenly. The second flocculation zone 13 is equipped with a clean water drain pipe, and the bottom of the second flocculation zone 13 is equipped with a sedimentation tank 22. The sedimentation tank 22 is connected to the first flocculation zone 12 through a mud return pipe 32, and a mud pump 11 is provided on the mud return pipe 32.

[0022] In some embodiments, the clean water drain pipe includes a liquid outlet pipe 18, on which a plurality of upward-facing liquid outlet pipe inlets 20 are evenly distributed. The liquid outlet pipe 18 is provided with a filter brush 19 inside, and the filter brush 19 is a fiber filter brush.

[0023] In some embodiments, the second flocculation zone 13 is provided with a first spray pipe 26 and a second spray pipe 28. The first spray pipe 26 and the second spray pipe 28 are each provided with a manual valve at one end extending out of the second flocculation zone 13. The first spray pipe 26 and the second spray pipe 28 are respectively provided with a plurality of first spray ports 27 and a plurality of second spray ports 29.

[0024] In some embodiments, the sedimentation tank 22 is an inverted trapezoidal groove, and a manual valve is provided at one end of the mud return pipe 32 extending out of the second flocculation zone 13. A plurality of mud return branch pipes 33 are provided on the main pipe of the mud return pipe 32, and the mud return branch pipes 33 are located inside the sedimentation tank 22.

[0025] In some embodiments, the top of the auger conveying pipe 15 is provided with an auger motor 34, and a small auger is connected below the top of the auger conveying pipe 15. A compression device 16 is provided at the mud outlet of the small auger, and a first vibrator 14 is provided on the side wall of the compression device 16. A clean water circulation pipe 7 is provided between the second flocculation zone 13 and the agent mixing tank 3, and a clean water circulation solenoid valve 35 is provided on the clean water circulation pipe 7.

[0026] In some embodiments, the connecting pipe 23 includes an L-shaped pipe body and a horizontally placed pipe body perpendicular to the L-shaped pipe body. The top surface of the L-shaped pipe body is provided with a plurality of connecting pipe inlets 24, and the side surface of the horizontally placed pipe body is provided with a plurality of connecting pipe outlets 25. The connecting pipe inlets 24 are located in the first flocculation zone 12, and the connecting pipe outlets 25 are located in the second flocculation zone 13.

[0027] In some embodiments, the auger conveying pipe 15 is provided with a plurality of drainage holes on the portion of the pipe above the top surface of the second flocculation zone 13, and the top surface of the second flocculation zone 13 is provided with a drainage zone 17, and the drainage zone 17 and the second flocculation zone 13 are connected by a drainage pipe 21 for backflow.

[0028] In some embodiments, a liquid pump 41 is provided above the agent mixing tank 3, a dosing pump 40 and an inverted bucket-shaped solid agent storage tank 10 are provided above the liquid agent storage tank 2, and a second vibrator is provided on the side wall of the solid agent storage tank 10; a first flow controller 38 and a second flow controller 39 are provided at one end of the coal-containing wastewater inlet pipe 8.

[0029] In some embodiments, the electrical control box 1 is equipped with an electrically controlled automatic dosing device and a starter 36 connected to the liquid agent storage tank 2 and the agent mixing tank 3. A level gauge 37 is provided above the liquid agent storage tank 2. An extraction metering device is provided above the liquid agent storage tank 2, the agent mixing tank 3 and the second flocculation zone 13. A stirring pump 6 extending into the tank body is provided above the agent mixing tank 3.

[0030] In some embodiments, the outer walls of the liquid medicine storage tank 2 and the medicine mixing tank 3 are provided with a high-level manual drain port 30 and a low-level manual drain port 31.

[0031] To facilitate understanding of the above technical solutions of the present invention, the following will further explain the above technical solutions of the present invention through specific working principles.

[0032] In practical use, according to the coal-containing wastewater sedimentation and separation system of the present invention, firstly, clean water and solid reagents are mixed in a reagent mixing tank via an automatic proportioning and dosing device. The mixing time (to ensure thorough mixing of the reagents and water) is approximately 30 minutes. When the liquid level in the liquid reagent storage tank reaches the upper limit, the level gauge transmits information to the intelligent power distribution system; the pump starts working, transferring the reagent from the reagent tank to the liquid reagent storage tank; after the reagent level in the storage tank reaches the upper limit, the level gauge transmits information to the intelligent power distribution system; coal... The flow meter at the main inlet of the water separation system starts working, accompanied by the operation of the metering chemical pump. The chemical solution and the liquid being treated are mixed and fully reacted. Solid particles and impurities settle after the reaction, while clear water floats to the surface and flows through the overflow pipe into the storage tank for a secondary reaction. Solid impurities settle again, and clear water is discharged through the fiber brush pipe at the top of the tank and exits into the downstream pipeline. Fine suspended matter is intercepted as it passes through the fiber brush pipe. Impurities settled at the bottom of the storage tank are pumped by the mud pump to the auger sludge collection tank, and the first auger of the system begins operation. The collected sludge and water are mixed and agitated. The outlet of the first auger connects to a smaller auger. If the sludge discharged from the first auger still contains a certain amount of moisture, it is collected by the small auger sludge collector. The small auger further dries the collected sludge. After compression by the compression device, the sludge is smoothly discharged through the sludge discharge port under the action of the first vibrator.

[0033] The discharge pipe 18 is equipped with several discharge pipe inlets 20, which can uniformly discharge clean water, facilitating the rapid sedimentation of coal-containing wastewater in the flocculation zone and preventing the formation of water vortices due to the discharge of clean water, which would affect sedimentation. The first spray pipe 26 and the second spray pipe 28, as well as the first spray nozzle 27 and the second spray nozzle 29 located on them, are used to periodically clean the second flocculation zone 13. In addition, several connecting pipe outlets 25 are provided on the side of the horizontally placed pipe body of the connecting pipe 23, which effectively reduces the water flow velocity, evens out the water flow, and facilitates sedimentation and flocculation.

[0034] In summary, by utilizing the above-mentioned technical solutions of this invention and through the optimized and improved design of the product of this invention, natural gravity sedimentation and flocculation treatment are effectively combined, and secondary sedimentation, flocculation, and compression of sediment are achieved. The treated water in the system is also recycled and reused, thereby achieving the technical effects of improving operating efficiency, enhancing automation, effectively reducing the moisture content of peat, and improving the impact resistance of peat. Furthermore, the product of this invention also has the technical advantages of short process flow, good treatment effect, small footprint, stable effluent, high degree of automation, and the ability to achieve unattended continuous operation.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sedimentation and separation system for coal-containing wastewater, characterized in that, Includes an electrical control box (1), on one side of which is a liquid agent storage tank (2) and an agent stirring tank (3), and on the side away from the electrical control box (1) are a first flocculation zone (12) and a second flocculation zone (13). The first flocculation zone (12) is provided with a coal-containing wastewater inlet pipe (8) and a connecting pipe (23) connecting the second flocculation zone (13). The liquid agent storage tank (2) is provided with a liquid agent transmission pipe (9) connecting the coal-containing wastewater inlet pipe (8). A mud deposition device (4) is provided below the first flocculation zone (12). The mud deposition device (4) is provided with a screw conveyor pipe (15) leading to the outside of the tank. A mixer is provided in the coal-containing wastewater inlet pipe (8). The second flocculation zone (13) is equipped with a clean water drain pipe, and the bottom of the second flocculation zone (13) is equipped with a sedimentation tank (22). The sedimentation tank (22) is connected to the first flocculation zone (12) through a mud return pipe (32). A mud pump (11) is provided on the mud return pipe (32). The clean water drain pipe includes a liquid outlet pipe (18), and a number of liquid outlet pipe inlets (20) with upward openings are evenly distributed on the liquid outlet pipe (18). The liquid outlet pipe (18) is equipped with a filter brush (19), which is a fiber filter brush. The sedimentation tank (22) is an inverted trapezoidal groove. The end of the mud return pipe (32) extending out of the second flocculation zone (13) is equipped with a manual valve. Several mud return branch pipes (33) are distributed on the main pipe of the mud return pipe (32). The mud return branch pipes (33) are located inside the sedimentation tank (22). The top of the auger conveying pipe (15) is equipped with an auger motor (34), and a small auger is connected below the top of the auger conveying pipe (15). A compression device (16) is provided at the mud outlet of the small auger, and a first vibrator (14) is provided on the side wall of the compression device (16). A clean water circulation pipe (7) is provided between the second flocculation zone (13) and the agent mixing tank (3), and a clean water circulation solenoid valve (35) is provided on the clean water circulation pipe (7). The connecting pipe (23) includes an L-shaped pipe body and a horizontal pipe body perpendicular to the L-shaped pipe body. The top surface of the L-shaped pipe body is provided with a number of connecting pipe inlets (24), and the side surface of the horizontal pipe body is provided with a number of connecting pipe outlets (25). The connecting pipe inlets (24) are located in the first flocculation zone (12), and the connecting pipe outlets (25) are located in the second flocculation zone (13). The auger conveying pipe (15) is provided with several drainage holes on the part of the pipe that is above the top surface of the second flocculation zone (13). The top surface of the second flocculation zone (13) is provided with a drainage zone (17). The drainage zone (17) and the second flocculation zone (13) are connected by a drainage pipe (21) for backflow.

2. The sedimentation and separation system for coal-containing wastewater according to claim 1, characterized in that, The second flocculation zone (13) is provided with a first spray pipe (26) and a second spray pipe (28). The first spray pipe (26) and the second spray pipe (28) are each provided with a manual valve at one end extending out of the second flocculation zone (13). The first spray pipe (26) and the second spray pipe (28) are respectively provided with a number of first spray ports (27) and a number of second spray ports (29).

3. The sedimentation and separation system for coal-containing wastewater according to claim 1, characterized in that, A liquid pump (41) is provided above the agent mixing tank (3), a dosing pump (40) and an inverted bucket-shaped solid agent storage tank (10) are provided above the liquid agent storage tank (2), and a second vibrator is provided on the side wall of the solid agent storage tank (10); a first flow controller (38) and a second flow controller (39) are provided at one end of the coal-containing wastewater inlet pipe (8).

4. The sedimentation and separation system for coal-containing wastewater according to claim 1, characterized in that, The electrical control box (1) is equipped with an electronically controlled automatic dosing device and a starter (36) connected to the liquid agent storage tank (2) and the agent mixing tank (3). A level gauge (37) is provided above the liquid agent storage tank (2). An extraction metering device is provided above the liquid agent storage tank (2), the agent mixing tank (3) and the second flocculation zone (13). A stirring pump (6) extending into the tank body is provided above the agent mixing tank (3).

5. A sedimentation and separation system for coal-containing wastewater according to any one of claims 1-4, characterized in that, The outer walls of the liquid medicine storage tank (2) and the medicine mixing tank (3) are equipped with a high-level manual drain port (30) and a low-level manual drain port (31).

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