Coal slime coarse granulation blending filter pressing dewatering device

Abstract

The utility model relates to coal slime water treatment equipment technical field, specifically is a kind of coal slime coarse granulation blending pressure filtration dewatering device.The utility model is fully mixed with coal slime water and coarse particle by stirring bucket, utilizes stirring paddle to strengthen stirring effect, so that coarse particle can be evenly dispersed in coal slime water, change the particle structure of coal slime, form more beneficial to the mode of dewatering.The coal slime mixture after sufficient mixing enters filter press, due to the change of coal slime structure by adding coarse particle and fully mixing in early stage, in the extrusion filtration process of filter press, coal slime is no longer easy to block filter plate concave drainage ditch as traditional mode, moisture can be more smoothly discharged.And, the filtrate flow sensor installed at filter press liquid discharge port monitors filtrate flow in real time, and operator can adjust filter press working parameter in time according to flow data, further optimizes dewatering process, ensures that moisture in coal slime filter cake is discharged as far as possible, to effectively reduce filter cake moisture.

Description

Technical Field

[0001] This utility model relates to the technical field of coal slime water treatment equipment, specifically a coal slime coarse-grained blending pressure filtration dewatering device. Background Technology

[0002] In coal preparation plants, filter presses are typically used to remove moisture from coal slime, improving coal product quality, reducing subsequent transportation and storage costs, and preventing problems such as spontaneous combustion due to excessive moisture. Secondly, dehydrated coal slime can be reused as energy, reducing resource waste and improving the comprehensive utilization rate of coal resources. Furthermore, effective treatment of coal slime can reduce environmental pollution, avoiding land occupation and water pollution caused by indiscriminate dumping of coal slime.

[0003] Currently, the commonly used method of dewatering coal slime through filter presses faces the dilemma of persistently high moisture content in the filter cake and slow filtration speed. This is because, during the process of squeezing and filtering coal slime, the fine particle size and high viscosity of the coal slime cause the drainage channels formed on the concave surface of the filter plate to be blocked by the coal slime. Consequently, the water in the coal slime filter cake cannot be discharged quickly, resulting in the water that should be discharged remaining in the filter cake.

[0004] It is evident that the current dewatering method using filter presses suffers from low dewatering efficiency. Therefore, developing a device that can effectively improve the dewatering performance of coal slime is urgently needed. Utility Model Content

[0005] To avoid and overcome the technical problems existing in the prior art, this utility model provides a coal slime coarse-grained blending and pressure filtration dewatering device. This utility model can effectively reduce the moisture content of the coal slime filter cake.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A coal slime coarse-grained blending and dewatering device includes a mixing tank for mixing coal slime water and coarse particles, and a stirring paddle installed inside the mixing tank to stir the mixture; the inlet of the mixing tank is connected to a storage bin for providing coarse particles, and a filter press is installed at the outlet of the mixing tank to squeeze and filter the mixture.

[0008] As a further embodiment of this utility model: the stirring paddle includes a stirring shaft coaxially and rotatably installed in the stirring tank, and two sets of stirring blades are arranged sequentially from top to bottom along the axial direction on the stirring shaft, and the surface of each stirring blade is arranged vertically; each stirring blade in the upper set of stirring blades is arranged downwardly, and each stirring blade in the lower set of stirring blades is arranged horizontally.

[0009] As a further improvement of this utility model: a screw conveyor is installed at the discharge port of the storage bin, and the discharge port of the screw conveyor is connected to the solid feed port of the mixing tank.

[0010] As a further improvement of this utility model, a coarse particle feed rate sensor is installed at the discharge port of the screw conveyor.

[0011] As a further improvement of this utility model, the liquid inlet of the mixing tank is connected to the coal slurry water conveying pipe.

[0012] As a further improvement of this utility model, a coal slurry water flow sensor is installed inside the coal slurry water conveying pipe.

[0013] As a further improvement of this invention, a speed sensor is installed on the stirring shaft.

[0014] As a further improvement of this utility model, a coal slurry water concentration sensor is installed on the inner wall of the mixing tank.

[0015] As a further improvement of this invention, a liquid level sensor is installed inside the mixing tank.

[0016] As a further improvement of this utility model, a filtrate flow sensor is installed at the liquid outlet of the filter press.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This invention uses a mixing tank to thoroughly mix coal slurry with coarse particles, and a stirring paddle to enhance the mixing effect, ensuring that the coarse particles are evenly dispersed in the coal slurry, thus altering the particle structure of the coal slurry and creating a form more conducive to dewatering. After the thoroughly mixed coal slurry mixture enters the filter press, the added coarse particles and thorough mixing alter the coal slurry structure. During the filter press's pressing and filtration process, the coal slurry is less likely to clog the drainage channels on the concave surface of the filter plate as in traditional methods, allowing for smoother water drainage. Furthermore, a filtrate flow sensor installed at the filter press's liquid outlet monitors the filtrate flow rate in real time. Operators can adjust the filter press's operating parameters based on the flow data to further optimize the dewatering process, ensuring that as much water as possible is removed from the coal slurry filter cake, thereby effectively reducing the moisture content of the filter cake.

[0019] 2. The upper stirring blades are arranged at a downward angle, which guides the material in the upper part of the mixing tank downwards, enhancing the downward flow of the material; the lower stirring blades are arranged horizontally, which can fully stir and disperse the material at the bottom. The two sets of stirring blades with different arrangements work together to form a three-dimensional stirring effect, which can make the coal slurry and coarse particles mix more evenly and thoroughly, further improving the mixing efficiency and quality, and providing a better material foundation for subsequent filter press dewatering.

[0020] 3. Installing a screw conveyor at the discharge port of the storage silo ensures a stable and continuous supply of coarse particles to the solid feed port of the mixing tank, guaranteeing the stability and controllability of the coarse particle supply. Compared to other conveying methods, the screw conveyor offers advantages such as high conveying efficiency, resistance to clogging, and adjustable conveying speed. It can precisely control the amount of coarse particles conveyed, achieving the optimal mixing ratio between coarse particles and coal slurry in the mixing tank, thus improving the operational stability and reliability of the entire dewatering unit.

[0021] 4. A coarse particle feed rate sensor installed at the screw conveyor outlet can monitor and provide feedback on the amount of coarse particles conveyed in real time. By obtaining accurate feed rate data, operators can adjust the operating parameters of the screw conveyor in a timely manner, or coordinate with the flow rate of coal slurry to ensure that the coal slurry and coarse particles are always mixed in a suitable ratio, thereby ensuring the stability and consistency of the dewatering effect and avoiding problems such as poor dewatering effect caused by fluctuations in the feed rate.

[0022] 5. The liquid inlet of the mixing tank is connected to the coal slurry conveying pipe, clearly defining the input path of the coal slurry and allowing it to smoothly enter the mixing tank for mixing with coarse particles. This direct connection design reduces energy loss and flow resistance during coal slurry transportation, improves the transportation efficiency, and ensures the continuity and stability of the mixing process between the coal slurry and coarse particles. This contributes to achieving efficient coarse-grained coal slurry blending and pressure filtration dewatering.

[0023] 6. The coal slurry water flow sensor installed inside the coal slurry water conveying pipe can accurately measure the flow rate of the coal slurry water in real time. By monitoring the flow rate of the coal slurry water, it can be matched and adjusted with the amount of coarse particles fed in, ensuring that the two are mixed in the ideal ratio. At the same time, the flow data also provides an important basis for the operation monitoring and optimization of the entire dewatering unit, making it easier for operators to promptly detect abnormalities, such as sudden changes in flow, and thus take corresponding measures to make adjustments, ensuring the stable operation of the unit and the dewatering effect.

[0024] 7. The stirring paddle speed directly affects the mixing effect of coal slurry and coarse particles. By monitoring the speed, operators can adjust the stirring paddle speed in a timely manner according to different coal slurry characteristics and mixing requirements, ensuring that the materials are fully and effectively mixed in the mixing tank. In addition, the speed data can also be used to analyze the operating status of the stirring paddle, promptly identify potential faults, such as abnormal speed fluctuations, and ensure the normal operation of the mixing equipment.

[0025] 8. A coal slurry concentration sensor is installed on the inner wall of the mixing tank, enabling real-time acquisition of the coal slurry concentration. Coal slurry concentration is a key factor affecting coal slurry dewatering efficiency. Real-time monitoring allows operators to adjust the amount of coarse particles added or other operating parameters based on concentration changes, optimizing the mixing ratio of coal slurry and coarse particles to improve dewatering efficiency and the quality of the coal slurry filter cake. Furthermore, the concentration data also helps in optimizing and improving the entire dewatering process.

[0026] 9. A liquid level sensor installed inside the mixing tank can monitor the liquid level in real time. Liquid level information is crucial for ensuring the normal operation of the mixing tank. Real-time monitoring of the liquid level can prevent overflow or dry burning, ensuring the safe and stable operation of the equipment. Furthermore, the liquid level data can be linked with other parameters for control, such as automatically adjusting the feed rate of coal slurry and coarse particles based on the liquid level, achieving automated and intelligent operation of the entire dewatering unit.

[0027] 10. A filtrate flow sensor installed at the liquid outlet of the filter press can monitor the filtrate flow rate in real time. The filtrate flow rate reflects the effect and efficiency of the filter press dewatering process. By monitoring the filtrate flow rate, operators can intuitively understand the working status of the filter press and determine whether the dewatering process is normal. If the filtrate flow rate is abnormal, such as too high or too low, the cause can be analyzed promptly, and corresponding measures can be taken for adjustment, such as optimizing the operating parameters of the filter press and checking for equipment malfunctions, thereby ensuring the quality and efficiency of coal slime dewatering. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model.

[0029] In the diagram: 10. Mixing tank; 11. Mixing paddle; 111. Mixing shaft; 112. Mixing blade; 12. Mixing motor; 13. Speed ​​sensor; 14a. Upper liquid level sensor; 14b. Lower liquid level sensor; 15. Coal slurry concentration sensor; 17. Spiral guide plate; 20. Storage bin; 21. Control panel; 22. Screw conveyor; 221. Screw motor; 222. Screw blade; 23. Coarse particle feed rate sensor; 24. T-joint; 30. Coal slurry conveying pipe; 31. Coal slurry flow sensor; 40. Filter press; 41. Filtrate outlet pipe; 42. Filtrate flow sensor; 43. Feed pump; 44. Filter press feed pipe. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1 This utility model consists of three parts: a coarse particle storage and conveying system, a mixing device, a filter press device, and an intelligent control system.

[0032] Coarse Particle Storage and Conveying System: A coarse particle storage bin 20 is provided. The storage bin 20 is made of high-strength steel and has moisture-proof and anti-caking functions. A screw conveyor 22 is installed at the bottom of the storage bin 20, driven by a screw motor 221, which can precisely control the conveying amount of coarse particles. The material is fed into the conveying pipe through the screw blades 222 and is connected to the mixing tank 10 through a three-way pipe 24. The three-way pipe 24 is equipped with a coarse particle feed rate sensor 23, which can flexibly adjust the amount of coarse particles added according to the properties of the coal slime and the processing requirements.

[0033] Mixing Device: A novel mixing structure is adopted, consisting of a mixing tank 10 and a mixing paddle 11. A spiral guide plate 17 is provided on the inner wall of the mixing tank 10, with the spiral direction of the guide plate 17 aligned with the mixing direction of the mixing paddle 11. This guide plate directs the flow of coal slurry and coarse particles, enhancing the mixing effect. The mixing paddle 11 is designed with a double-layer, multi-angle structure. The mixing paddle 11 includes a mixing shaft 111 coaxially and rotatably mounted within the mixing tank 10. Two sets of mixing blades 112 are arranged axially from top to bottom on the mixing shaft 111, with each blade 112 arranged vertically. The upper set of blades 112 is inclined downwards, while the lower set is arranged horizontally. The mixing shaft 111 is driven by a mixing motor 12, enabling mixing at different speeds to ensure rapid and uniform dispersion of coarse particles in the coal slurry. A speed sensor 13 installed on the stirring shaft 111 can detect the rotation speed of the stirring shaft 111 in real time, and adjust the rotation speed of the stirring shaft 111 accordingly to complete the mixing of different degrees. A coal slurry water concentration sensor 15 is installed on the inner wall of the mixing tank 10, which can obtain the concentration information of the coal slurry water in the mixing tank 10 in real time. An upper liquid level sensor 14a and a lower liquid level sensor 14b are installed sequentially from top to bottom on the inner wall of the mixing tank 10, which can monitor the liquid level height in the tank in real time.

[0034] Filter press device: A filter press 40 is used. The filter press 40 and the mixing tank 10 are connected to each other through a filter press feed pipe 44. In order to improve the stability of feeding, a feed pump 43 is added to the filter press feed pipe 44 to provide a stable feed pressure for the filter press 40 and improve the continuity of feeding. A filtrate flow sensor 42 is also installed in the filtrate outlet pipe 41 of the filter press 40 for real-time detection of filtrate volume.

[0035] Intelligent Control System: Equipped with an intelligent control system, which uses sensors to monitor parameters such as the flow rate, concentration, amount of coarse particles added, and moisture content of the filter cake in real time. Based on preset parameter ranges, the control system automatically adjusts the speed of the screw conveyor and the speed of the agitator blades 11, achieving automated and intelligent operation of the entire device. The control terminal of the entire intelligent control system is integrated into the control panel 21, which is installed on the outer wall of the storage compartment 20.

[0036] The usage process of this utility model is as follows:

[0037] I. Installation and Debugging

[0038] 1. Equipment Installation

[0039] Within the coal slime treatment workshop, installation is carried out in locations with sufficient load-bearing capacity, good ventilation, and convenient material transportation, based on the dimensions, weight, and operating space requirements of each component. The coarse particle storage bin 20 is fixed to a flat, solid ground foundation using anchor bolts to ensure stability and prevent shaking or displacement during operation. The mixing tank 10 of the mixing unit must be installed vertically to ensure the stability of the mixing paddle 11 during rotation. During the installation of the filter press, attention must be paid to the parallelism and perpendicularity of the filter plates to ensure uniform pressure distribution during filtration. Pipeline connections between various devices utilize sealing structures such as flanges and sealing rings to ensure no leakage of coal slime water and coarse particles during transport. For wiring connections, strict adherence to electrical drawings and relevant specifications is required; power lines and signal lines are categorized, organized, and secured to ensure stable power supply and accurate, interference-free signal transmission.

[0040] 2. Equipment debugging

[0041] Commissioning of Screw Conveyor 22: Connect the power supply to the screw conveyor 22, start the screw motor 221, and observe the rotation of the screw blades 222. Check whether the gap between the screw blades 222 and the inner wall of the conveying pipe is uniform. The gap should be controlled within the range of 2-5 mm to avoid material residue due to excessive gap or damage to the blades due to friction between the blades and the pipe due to insufficient gap. During operation, listen to whether the equipment is operating normally. If abnormal noise or vibration occurs, stop the machine immediately for inspection. Check for problems such as loose blades or damaged bearings, and perform corresponding repairs or adjustments. At the same time, test the conveying capacity of the screw conveyor 22. By adjusting the speed of the screw motor 221, observe the conveying volume of coarse particles per unit time at different speeds to ensure that it can meet the operating requirements of the device.

[0042] Agitator 11 Adjustment: Turn on the agitator motor 12 and run the agitator 11 at low, medium, and high speeds. Observe whether the rotation of the agitator 11 is smooth and whether there is any wobbling or eccentricity. Use the speed sensor 13 to measure the actual speed of the agitator 11 and compare it with the set speed. The error should be controlled within ±3%. Add an appropriate amount of clean water to the mixing tank 10 to simulate the mixing state of coal slurry and water, and observe the mixing effect to ensure that the agitator 11 can form a good circulation flow of liquid in the tank without any dead zones. If the mixing effect is not good, adjust the angle or spacing of the agitator blades 112 until the ideal mixing state is achieved.

[0043] Commissioning of feed pump 43: Start feed pump 43 and gradually adjust the pump's outlet valve, observing changes in pump pressure output. Check the accuracy of the pump's pressure gauge display; pressure fluctuations should be controlled within ±5% of the set pressure value. Test the flow stability of feed pump 43 by changing the pump's speed or adjusting the valve opening, observing flow changes under different operating conditions to ensure a stable and continuous feed pressure for filter press 40 during operation. Simultaneously, check the sealing performance of feed pump 43 to prevent coal slurry leakage.

[0044] Filter Press 40 Commissioning: First, check if the surface of the filter plates of the filter press 40 is flat and undamaged, and whether the filter cloth is installed correctly without wrinkles or damage. Start the clamping device of the filter press 40 and slowly clamp the filter plates, measuring the clamping force between the filter plates. It should meet the equipment's specified clamping force standard, generally 15-25 MPa, depending on the equipment model. Then, pass clean water into the filter press 40 to conduct a pressure test and observe whether there is any leakage at the filter plate seals. If leakage is found, the filter cloth needs to be readjusted or the sealing performance of the sealing strip needs to be checked. In addition, test the automatic plate-pulling and unloading function of the filter press 40 to ensure that the plate-pulling trolley runs smoothly and the filter plates can be accurately and smoothly pulled open and closed.

[0045] II. Parameter Settings

[0046] Based on laboratory test data of coal slime, such as particle size analysis reports, viscosity test results, and concentration test values, relevant parameters are set in the intelligent control system.

[0047] Setting the proportion of coarse particles: For coal slime with a particle size of less than 0.074mm and a content exceeding 80% and high viscosity, the proportion of coarse particles can be set at 20%-30% by mass. If the coal slime has a relatively coarse particle size and low viscosity, the proportion of coarse particles can be appropriately reduced to 10%-15%. In actual operation, the proportion of coarse particles can be finely adjusted through the intelligent control system according to the fluctuations in the properties of the coal slime.

[0048] Agitator speed setting 11: When coal slime is difficult to mix, such as high-concentration and highly viscous coal slime, the agitator speed 11 can be set to 80-120 r / min; for general coal slime, the speed can be set to 50-80 r / min. The agitator speed setting 11 also needs to take into account the volume of the mixing tank 10 and the amount of material filled to ensure good mixing effect under different working conditions.

[0049] III. Operation

[0050] 1. Feeding stage

[0051] The coal slurry pump is activated via control panel 21. The coal slurry water is transported through coal slurry water delivery pipe 30 to the tee pipe 24, and then enters the mixing tank 10. Coal slurry water flow sensor 31 monitors the flow rate of the coal slurry water in real time and transmits the data to the intelligent control system. When abnormal fluctuations occur in the flow rate, such as a sudden increase or decrease exceeding a set threshold (generally ±10% of the set flow rate), the system automatically issues an audible and visual alarm signal, prompting the operator to check the coal slurry water pump and pipelines for blockages, leaks, or other problems. Operators must promptly inspect and address any issues with the relevant equipment and pipelines to ensure the stability and continuity of the coal slurry water delivery.

[0052] Simultaneously, the screw conveyor 22 is started, and the screw motor 221 drives the screw blades 222 to rotate, adding coarse particles from the storage bin 20 into the mixing tank 10 according to a set ratio. The coarse particle feed rate sensor 23 monitors the amount of coarse particles in real time. Once the deviation between the actual added amount and the set value exceeds the allowable range (generally ±5%), a signal is immediately fed back to the intelligent control system. The system automatically adjusts the speed of the screw conveyor 22 to restore the amount of coarse particles added to the set value, ensuring that the coarse particles and coal slurry are always mixed in a suitable ratio.

[0053] 2. Mixing stage

[0054] The stirring paddle 11 inside the mixing tank 10 starts operating under the drive of the stirring motor 12. The downward-sloping stirring blades 112 at the top guide the material in the upper part of the mixing tank 10 downwards, while the horizontally arranged stirring blades 112 at the bottom fully stir and disperse the material horizontally. The two work together to form a three-dimensional stirring effect. The spiral guide plate 17 on the inner wall of the mixing tank 10 rotates in the same direction as the stirring paddle 11, further guiding the flow direction of the coal slurry and coarse particles, enhancing the mixing effect.

[0055] A speed sensor 13 installed on the stirring shaft 111 detects the rotational speed of the stirring shaft 111 in real time and feeds the data back to the intelligent control system. The system automatically adjusts the rotational speed of the stirring shaft 111 according to the coal slime mixing conditions. For example, when the coal slime water concentration is detected to be high and mixing is difficult, the system automatically increases the rotational speed of the stirring paddle 11; when the coal slime water concentration decreases and the mixing effect is good, the rotational speed is appropriately reduced to save energy. Simultaneously, a coal slime water concentration sensor 15 acquires real-time information on the concentration of coal slime water in the mixing tank 10, providing a basis for the intelligent control system to adjust the amount of coarse particles added and the mixing parameters.

[0056] Upper liquid level sensor 14a and lower liquid level sensor 14b monitor the liquid level in the mixing tank 10 in real time. When the liquid level reaches the upper liquid level set value, the intelligent control system automatically controls the coal slurry pump and screw conveyor 22 to stop feeding to prevent excessive overflow of coal slurry water in the mixing tank 10. When the liquid level is lower than the lower liquid level set value, the system issues an alarm to remind the operator to check the feeding situation and avoid the mixer running dry. If the liquid level is too low for a long time, it is necessary to check whether the coal slurry pump and screw conveyor 22 are malfunctioning or whether the pipeline is blocked.

[0057] 3. Filtration stage

[0058] The mixed coal slurry is fed into the filter press 40 via the feed pipe through the feed pump 43. The feed pump 43 provides a stable feed pressure to the filter press 40. Initially, the outlet valve of the feed pump 43 should be opened slowly to gradually increase the pressure inside the filter press 40, preventing damage to the filter plates or splashing of the coal slurry due to a sudden pressure increase. During the feeding process, the feed pressure should be kept stable at a set value, generally 0.4-0.6 MPa, depending on the model of the filter press 40 and the properties of the coal slurry.

[0059] The filtrate flow sensor 42 in the filtrate outlet pipe 41 of the filter press 40 monitors the filtrate volume in real time. The intelligent control system monitors multiple parameters in real time, including the flow rate, concentration, amount of coarse particles added, pressure during the filtration process, and filter cake moisture content, through sensors. When the filter cake moisture content is detected to be higher than the preset value, the system automatically increases the amount of coarse particles added, increases the speed of the agitator 11, and appropriately extends the filtration time and increases the filtration pressure, generally by 0.1-0.2 MPa each time, adjusted according to the actual situation. If the filtrate flow suddenly decreases or stops during the filtration process, it may be due to filter cloth blockage or poor filter plate sealing. In this case, the system will issue an alarm, and the operator needs to stop the filter press 40, check the filter cloth and filter plate sealing, and clean or adjust them.

[0060] IV. Unloading and Equipment Cleaning

[0061] After filtration is completed, when the pressure inside the filter press 40 drops to 0 MPa, the automatic plate-pulling unloading function of the filter press 40 is activated. The plate-pulling trolley pulls the filter plates apart one by one, and the coal slime filter cake is discharged under gravity. The discharged filter cake is transported to a designated location via a belt conveyor or other transport equipment. After unloading, the filter plates and filter cloth of the filter press 40 are cleaned. The surface of the filter cloth is rinsed with a high-pressure water gun to remove coal slime residue, and the filter cloth is checked for damage. If any damage is found, it must be replaced in time. Impurities on the surface of the filter plates and coal slime on the sealing strips are cleaned to ensure the cleanliness of the filter plates and sealing strips, preparing them for the next operation. At the same time, the internal parts of the mixing tank 10, screw conveyor 22, feed pump 43, and other equipment are cleaned to remove residual coal slime water and coarse particles, preventing material accumulation from affecting equipment performance and service life.

[0062] From an overall structural design perspective, the coal slime coarse-grained blending and pressure filtration dewatering device uses a mixing tank 10 to thoroughly mix the coal slime water with coarse particles, which is a crucial initial step in reducing the moisture content of the filter cake. Coal slime particles are fine and highly viscous, easily clogging the drainage channels on the concave surface of the filter plate, making it difficult for water to drain. Adding coarse particles alters the particle structure of the coal slime, making it more porous and reducing its stickiness and agglomeration. The mixing paddle 11 installed inside the mixing tank 10 powerfully stirs the mixture. Two sets of mixing blades 112 with different arrangements—the upper blades tilting downwards and the lower blades arranged horizontally—work together to create a three-dimensional mixing effect, ensuring that the coarse particles are evenly dispersed in the coal slime water, resulting in more thorough mixing and further optimizing the physical properties of the coal slime, creating favorable conditions for subsequent dewatering.

[0063] In the material conveying process, the screw conveyor 22 at the outlet of the storage bin 20 stably and continuously transports coarse particles to the mixing tank 10. The coarse particle feed rate sensor 23 installed at the outlet of the screw conveyor 22 can monitor and provide feedback on the conveying rate in real time, ensuring precise and controllable addition of coarse particles. Simultaneously, the mixing tank 10 is connected to the coal slurry water conveying pipe 30 via a three-way pipe 24. The coal slurry water flow sensor 31 inside the coal slurry water conveying pipe 30 can accurately measure the flow rate. The two systems work together to ensure that the coal slurry water and coarse particles are always mixed in a suitable ratio, allowing the coarse particles to play their optimal role in improving the coal slurry structure.

[0064] In addition, multiple sensors installed on the inner wall of the mixing tank 10 provide strong support for reducing the moisture content of the filter cake. The speed sensor 13 detects the speed of the stirring paddle 11 in real time, which can be used to adjust the speed according to the characteristics of the coal slime and the mixing requirements to ensure the mixing effect; the coal slime water concentration detection sensor obtains the concentration information in real time, and the operator can adjust the amount of coarse particles added in a timely manner according to the concentration changes to maintain the optimal mixing ratio; the liquid level sensor monitors the liquid level in the tank in real time to ensure the normal operation of the mixing tank 10 and avoid the mixing process being affected by abnormal liquid levels.

[0065] After the thoroughly mixed coal slime mixture enters the filter press 40, the addition of coarse particles and thorough mixing alters the structure of the coal slime. During the pressing and filtration process in the filter press 40, the coal slime no longer easily clogs the drainage channels on the concave surface of the filter plates as in traditional methods, allowing water to drain more smoothly. Furthermore, a filtrate flow sensor 42 installed at the liquid outlet of the filter press 40 monitors the filtrate flow rate in real time. Operators can adjust the operating parameters of the filter press 40 based on the flow data to further optimize the dewatering process, ensuring that as much water as possible is removed from the coal slime filter cake, thereby effectively reducing the moisture content of the filter cake.

[0066] In summary, this utility model, through the coordinated work of its components, addresses the problem of water retention during traditional pressure filtration dewatering by altering the coal slime structure, precisely controlling the material mixing ratio, and ensuring stable equipment operation. This significantly improves the dewatering efficiency of coal slime, reduces the moisture content of the coal slime filter cake, and achieves highly efficient coal slime dewatering. This is of great significance in improving coal product quality, reducing transportation and storage costs, promoting comprehensive resource utilization, and reducing environmental pollution.

[0067] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A coal slime coarse-grained blending and pressure filtration dewatering device, characterized in that, It includes a mixing tank (10) for mixing coal slurry and coarse particles, and a stirring paddle (11) for stirring the mixture is installed inside the mixing tank (10); the inlet of the mixing tank (10) is connected to the storage bin (20) for providing coarse particles, and a filter press (40) for squeezing and filtering the mixture is installed at the outlet of the mixing tank (10).

2. The coal slime coarse-grained blending pressure filter dewatering device according to claim 1, characterized in that, The stirring paddle (11) includes a stirring shaft (111) coaxially and rotatably installed in the stirring tank (10). Two sets of stirring blades (112) are arranged sequentially from top to bottom along the axial direction on the stirring shaft (111), and the surface of each stirring blade (112) is arranged vertically. Each stirring blade (112) in the upper set of stirring blades (112) is arranged downwardly, and each stirring blade (112) in the lower set of stirring blades (112) is arranged horizontally.

3. A coal slime coarse-grained blending and pressure filtration dewatering device according to claim 1 or 2, characterized in that, The discharge port of the storage bin (20) is equipped with a screw conveyor (22), and the discharge port of the screw conveyor (22) is connected to the solid feed port of the mixing tank (10).

4. The coal slime coarse-grained blending and pressure filtration dewatering device according to claim 3, characterized in that, A coarse particle feed rate sensor (23) is installed at the discharge port of the screw conveyor (22).

5. The coal slime coarse-grained blending pressure filter dewatering device according to claim 4, characterized in that, The liquid inlet of the mixing tank (10) is connected to the coal slurry water conveying pipe (30).

6. The coal slime coarse-grained blending pressure filter dewatering device according to claim 5, characterized in that, A coal slurry water flow sensor (31) is installed inside the coal slurry water conveying pipe (30).

7. The coal slime coarse-grained blending pressure filter dewatering device according to claim 6, characterized in that, A speed sensor (13) is installed on the stirring shaft (111).

8. The coal slime coarse-grained blending pressure filter dewatering device according to claim 7, characterized in that, A coal slurry water concentration sensor (15) is installed on the inner wall of the mixing tank (10).

9. A coal slime coarse-grained blending and pressure filtration dewatering device according to claim 8, characterized in that, A liquid level sensor is installed inside the mixing tank (10).

10. A coal slime coarse-grained blending and pressure filtration dewatering device according to claim 9, characterized in that, A filtrate flow sensor (42) is installed at the liquid outlet of the filter press (40).

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