Mine water filtering device

Abstract

The invention relates to the technical field of mine water treatment, in particular to a mine water filtering device.According to the mine water filtering device, an ultrafiltration membrane assembly is arranged in a membrane pool to filter mine water, a pressure detector is arranged at a liquid outlet to monitor the water pressure in real time, and the pressure detector transmits real-time data to a controller; the controller is used for judging whether the water pressure entering the clean water tank meets the water production requirement or not, and automatically controlling the starting and stopping of each electrical device according to the judgment result, so that the spraying pump and the moving assembly are started in time when the membrane pollution problem occurs, and the clean water in the clean water tank is pumped to the spray head through the water production pipeline to clean the ultrafiltration membrane assembly; and different positions of the ultrafiltration membrane assembly are cleaned by moving the spray head through the moving assembly, so that pollutants on the surface of the ultrafiltration membrane can be quickly and thoroughly removed, and the water production efficiency is ensured. And moreover, the device does not need to add a coagulant to carry out flocculation and sedimentation treatment on the mine water, so that potential risks of drug residues on subsequent recycled water quality are avoided.

Description

Technical Field

[0001] This invention relates to the field of mine water treatment technology, and specifically to a mine water filtration device. Background Technology

[0002] Currently, ultrafiltration membrane technology is widely used in mine water purification, and its efficient physical separation capability provides an important pathway for the resource utilization of mine water. However, in practical applications, membrane fouling is a particularly prominent problem, severely restricting the long-term stable operation of ultrafiltration membranes. Unlike membrane fouling in conventional water treatment, pollutants in mine water mainly originate from coal dust and rock dust particles. These tiny particles easily accumulate on the membrane surface and inside the membrane pores, forming a dense fouling layer. These pollutants are poorly soluble in acids, alkalis, and surfactants, and have strong adhesion, making them difficult to remove effectively using traditional chemical cleaning and backwashing methods.

[0003] To mitigate membrane fouling risks, current technologies employ traditional processes centered on coagulation and sedimentation. This involves adding coagulants to promote the flocculation and sedimentation of fine particles, thus purifying the water and reducing the amount of particles entering the ultrafiltration membrane, thereby mitigating the risk of membrane fouling at its source. While this process has some effectiveness, the drastic fluctuations in mine water quality often lead to uncontrolled or excessive dosage of chemicals. This not only increases operating costs but also introduces metal ions such as iron and aluminum, posing a potential risk to the quality of subsequent recycled water and limiting the high-value reuse of water resources.

[0004] In summary, existing mine water treatment technologies face two main challenges: first, the precise control of chemical dosing in traditional coagulation processes leads to unstable effluent quality and the risk of secondary pollution; second, the lack of efficient cleaning methods for coal and rock particle contamination during ultrafiltration membrane application severely impacts the long-term stable operation of the membrane system. Therefore, there is an urgent need to develop a new mine water filtration device to address these issues. Summary of the Invention

[0005] The purpose of this application is to provide a mine water filtration device to solve the problems in the prior art.

[0006] To achieve the above objectives, this application provides a mine water filtration device, comprising: a membrane tank, a clear water tank, and a controller.

[0007] The membrane tank has an inlet and an outlet, with an inlet pump and an outlet pump respectively installed at the inlet and outlet. A pressure monitor is installed at the outlet. Mine water is connected to the inlet. The membrane tank contains an ultrafiltration membrane module and a cleaning module. The ultrafiltration membrane module has a water production channel inside, which is connected to the outlet. The cleaning module includes a nozzle and a moving component. The nozzle is fixedly mounted on the moving component. The moving component can drive the nozzle to reciprocate horizontally relative to the ultrafiltration membrane module. The spray surface of the nozzle faces the ultrafiltration membrane module. The clear water tank is connected to the outlet through a water production pipe, and the nozzle is connected to the water production pipe. A spray pump is installed on the water production pipe.

[0008] The inlet pump, the outlet pump, the pressure monitor, the moving component, and the spray pump are all electrically connected to the controller. The controller is configured to determine whether the water production requirements are met based on the water pressure detected by the pressure monitor, and adjust the opening and closing of the inlet pump, the outlet pump, the moving component, and the spray pump accordingly.

[0009] As a preferred technical solution, the controller is further configured to:

[0010] When the water pressure detected by the pressure monitor is less than or equal to the set value, the following action is taken:

[0011] S1. Turn off the inlet pump and the outlet pump, and start the spray pump and the moving component;

[0012] S2. After controlling the spray pump and the moving component to run for a period of time, turn off the spray pump and the moving component, and restart the inlet pump and the outlet pump to produce water in the second round.

[0013] When the water pressure detected by the pressure monitor is greater than the set value, the inlet pump and the outlet pump will continue to start and produce water continuously.

[0014] As a preferred technical solution, the ultrafiltration membrane assembly includes: a plurality of ultrafiltration membranes spaced apart in a horizontal direction, each of the ultrafiltration membranes having a water production path inside, the plurality of water production paths collectively defining the water production channel, the plurality of water production paths being respectively connected to the liquid outlet, and a plurality of cleaning components being provided, the plurality of cleaning components being provided in a one-to-one correspondence with the plurality of ultrafiltration membranes.

[0015] As a preferred technical solution, the cleaning assembly further includes a connecting pipe that extends vertically and has a water inlet channel. The water production pipe and the nozzle are respectively connected to the water inlet channel, and the connecting pipe is fixedly mounted on the movable assembly.

[0016] As a preferred technical solution, the nozzle is provided in multiple parts, and the multiple nozzles are connected to the connecting pipe at intervals.

[0017] As a preferred technical solution, the moving component is a robotic arm, which is electrically connected to the controller.

[0018] As a preferred technical solution, two robotic arms are provided, and the two robotic arms respectively clamp the upper and lower ends of the connecting tube.

[0019] As a preferred technical solution, the mine water filtration device further includes: a sludge tank, a sludge outlet at the bottom of the membrane tank, the sludge tank being connected to the sludge outlet via a sludge pipe, and a sludge pump being installed on the sludge pipe, the sludge pump being electrically connected to the controller.

[0020] As a preferred technical solution, the mine water filtration device further includes: a chassis, and the membrane tank, the clear water tank and the sludge tank are spaced apart on the chassis.

[0021] As a preferred technical solution, the nozzle is a duckbill nozzle.

[0022] This application discloses a mine water filtration device that filters mine water by installing an ultrafiltration membrane module in a membrane tank. A pressure detector at the outlet monitors the water pressure in real time, transmitting the data to a controller. The controller then determines whether the water pressure entering the clear water tank meets the production water requirements and automatically controls the operation of various electrical devices based on the determination result. In the event of membrane fouling, the device promptly activates a spray pump and a moving assembly to pump clean water from the clear water tank through the production water pipeline to the spray nozzles to clean the ultrafiltration membrane module. The moving assembly moves the spray nozzles to clean different parts of the ultrafiltration membrane module, ensuring rapid and thorough removal of contaminants from the ultrafiltration membrane surface and guaranteeing production efficiency. Furthermore, this device eliminates the need for adding coagulants for flocculation and sedimentation treatment of the mine water, effectively preventing membrane fouling and avoiding potential risks to the quality of subsequent recycled water from chemical residues. Attached Figure Description

[0023] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are intended only to conceptually represent the composition or structure of the described objects and may contain exaggerated representations, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 This is a front view of the mine water filtration device of the present invention;

[0025] Figure 2 This is a top view of the mine water filtration device of the present invention;

[0026] Figure 3 This is a front view of the cleaning component of the present invention;

[0027] Figure 4 This is a side view of the cleaning assembly of the present invention;

[0028] Figure 5 This is a graph showing the changes in turbidity and water pressure at the outlet of the present invention.

[0029] The components are as follows: 1. Membrane tank; 11. Inlet; 12. Outlet; 13. Inlet pump; 14. Outlet pump; 15. Ultrafiltration membrane module; 151. Ultrafiltration membrane; 16. Cleaning module; 161. Spray head; 162. Moving module; 163. Spray pump; 164. Connecting pipe; 17. Sewage outlet; 2. Clear water tank; 3. Pressure monitor; 4. Product water pipeline; 5. Sludge tank; 51. Sewage pump; 6. Sludge pipeline. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of this application, it should be understood that the terms "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention 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 application. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] Please see Figure 1-2This application provides a mine water filtration device, comprising: a membrane tank 1, a clear water tank 2, and a controller (not shown in the accompanying drawings). The membrane tank 1 has an inlet 11 and an outlet 12. An inlet pump 13 and an outlet pump 14 are respectively provided at the inlet 11 and the outlet 12, and a pressure monitor 3 is provided at the outlet 12. Mine water is connected to the inlet 11. The membrane tank 1 contains an ultrafiltration membrane module 15 and a cleaning module 16. The ultrafiltration membrane module 15 has a water production channel (not shown in the accompanying drawings) inside, which communicates with the outlet 12. The cleaning module 16 includes: a nozzle 161 and a moving component 162. The nozzle 161 is fixedly mounted on the moving component 162. The nozzle 161 can be driven to reciprocate horizontally relative to the ultrafiltration membrane assembly 15, and the spray surface of the nozzle 161 is set towards the ultrafiltration membrane assembly 15. The clear water tank 2 is connected to the liquid outlet 12 through the product water pipe 4, and the nozzle 161 is connected to the product water pipe 4. The product water pipe 4 is equipped with a spray pump 163. The inlet pump 13, the outlet pump 14, the pressure monitor 3, the moving component 162, and the spray pump 163 are respectively electrically connected to the controller. The controller is configured to: determine whether the water production requirements are met based on the water pressure detected by the pressure monitor 3, and adjust the opening and closing of the inlet pump 13, the outlet pump 14, the moving component 162, and the spray pump 163.

[0033] In this embodiment, during operation, the controller activates the inlet pump 13 and outlet pump 14 to transport mine water from the underground water intake point of the mine through the inlet 11 into the membrane tank 1. The mine water is filtered through the ultrafiltration membrane module 15, and the filtered sludge settles at the bottom of the membrane tank 1 due to gravity. The clean water flows through the product water channel to the outlet 12 and is then pumped into the clear water tank 2 for storage. During system operation, the pressure monitor 3 located at the outlet 12 monitors the water pressure at that location in real time and feeds the monitoring data back to the controller. When the pressure monitor 3 detects that the water pressure at the outlet 12 is lower than the set value, it is considered that the membrane has become fouled. At this time, the controller adjusts the opening and closing of the inlet pump 13, outlet pump 14, moving component 162, and spray pump 163 so that the spray head 161 cleans the ultrafiltration membrane 151, removing contaminants that clog the membrane pores and adhere to the surface of the ultrafiltration membrane 151, ensuring stable water production. Throughout the entire operation, no additional coagulant needs to be added, avoiding the potential risks to the quality of subsequent recycled water due to excessive chemical addition. Furthermore, this device can be applied downhole, eliminating the need for multiple independent facilities such as coagulation tanks, sedimentation tanks, and filtration tanks, significantly simplifying the treatment process.

[0034] In some embodiments, the controller is further configured to:

[0035] When the water pressure detected by the pressure monitor 3 is less than or equal to the set value, the following action is executed:

[0036] S1. Turn off the inlet pump 13 and the outlet pump 14, and start the spray pump 163 and the moving component 162;

[0037] S2. After controlling the spray pump 163 and the moving component 162 to run for a period of time, turn off the spray pump 163 and the moving component 162, and restart the inlet pump 13 and the outlet pump 14 to produce water in the second round.

[0038] When the water pressure detected by the pressure monitor 3 is greater than the set value, the inlet pump 13 and the outlet pump 14 are kept running to continuously produce water.

[0039] In this embodiment, when the data monitored by the pressure monitor 3 is less than the set value, it is considered that the ultrafiltration membrane 151 is clogged (i.e., membrane fouling). At this time, the controller controls the inlet pump 13 and outlet pump 14 to shut down to ensure that no more mine water enters the membrane tank 1 and no more clean water enters the clear water tank 2. Then, the controller controls the spray pump 163 and the moving component 162 to start and spray continuously for a period of time. The spray pump 163 pressurizes the clean water in the clear water tank 2 to a higher pressure and delivers it to the nozzle 161 through the product water pipe 4. When the water flows through the narrow outlet of the nozzle 161, it forms a high-speed jet. When the high-speed water flow contacts the membrane surface, it generates a direct mechanical impact force. For loose pollutants accumulated on the membrane surface, the impact force can directly break the adhesion between pollutant particles and the adhesion between pollutants and the membrane surface, causing the particles to peel off from the membrane surface. For fine pollutants partially embedded in the membrane pores, the impact energy of the high-speed water flow can push the particles trapped in the pores to move to the outside of the membrane, reducing membrane pore clogging. After cleaning, the controller shuts off the spray pump 163 and moving component 162, and restarts the inlet pump 13 and outlet pump 14 for secondary water production. This process quickly addresses membrane fouling and ensures efficient water production. Furthermore, the entire process is controlled by the controller, resulting in a faster response time compared to manual operation. This is more effective in cleaning the ultrafiltration membrane 151 in its early stages of clogging, preventing further deterioration. Please refer to [link to details] for further information. Figure 5 It can be seen that the water turbidity is stable during operation and is always less than 1 NTU, the cleaning frequency is significantly reduced, and the negative pressure of the produced water can be restored without chemical cleaning.

[0040] In some embodiments, the ultrafiltration membrane assembly 15 includes: a plurality of ultrafiltration membranes 151 spaced apart in a horizontal direction, each ultrafiltration membrane 151 having a water production path (not shown in the figures), the plurality of water production paths collectively defining the water production channel, the plurality of water production paths respectively communicating with the liquid outlet 12, and a plurality of cleaning components 16 correspondingly provided, the plurality of cleaning components 16 being arranged one-to-one with the plurality of ultrafiltration membranes 151. The plurality of ultrafiltration membranes 151 work together to filter mine water, and the filtered clean water is collected at the liquid outlet 12 through the water production path. The one-to-one arrangement of the cleaning components 16 with the ultrafiltration membranes 151 allows the controller to control the corresponding cleaning component 16 to perform a spraying operation when membrane fouling occurs, resulting in more precise cleaning and reduced energy consumption and water waste.

[0041] Please see Figure 3-4 In some embodiments, the cleaning assembly 16 further includes a connecting pipe 164, which extends vertically and has a water inlet channel. The water production pipe 4 and the nozzle 161 are respectively connected to the water inlet channel, and the connecting pipe 164 is fixedly mounted on the moving assembly 162.

[0042] In this embodiment, when the ultrafiltration membrane 151 needs to be cleaned, the controller controls the spray pump 163 to start, transporting clean water from the clear water tank 2 to the inlet channel through the product water pipe 4, and applying a certain pressure to the clean water. The pressurized clean water is then sprayed out through the nozzle 161 to rinse the surface and pores of the ultrafiltration membrane 151. Furthermore, the controller controls the moving component 162 to drive the connecting pipe 164 to move, allowing the nozzle 161 to reach all positions of the ultrafiltration membrane 151, resulting in more comprehensive spraying and more thorough cleaning.

[0043] To improve spraying efficiency and shorten spraying time, in some embodiments, multiple nozzles 161 are provided, and these multiple nozzles 161 are connected to the connecting pipe 164 at intervals. Multiple nozzles 161 are activated simultaneously to rinse the ultrafiltration membrane 151, greatly improving cleaning efficiency. Furthermore, the connecting pipe 164 extends vertically, allowing the multiple nozzles 161 to rinse the ultrafiltration membrane 151 vertically. Combined with the moving component 162, which reciprocates the connecting pipe 164 horizontally, all areas of the ultrafiltration membrane 151 surface can be rinsed, avoiding any cleaning dead zones.

[0044] In some embodiments, the moving component 162 is a robotic arm, which is electrically connected to the controller. On one hand, the robotic arm offers high operational precision, enabling it to move the nozzle 161 to a designated position more accurately for rinsing the ultrafiltration membrane 151. On the other hand, the robotic arm offers high mobility, allowing it to move the nozzle 161 to various positions on the ultrafiltration membrane 151 according to the controller's instructions, avoiding cleaning dead zones.

[0045] Since the connecting pipe 164 is elongated, if only one robotic arm is used to hold it, the connecting pipe 164 is prone to deflection or detachment during the spraying process. Therefore, in some embodiments, two robotic arms are provided, with the two robotic arms respectively holding the upper and lower ends of the connecting pipe 164. This ensures the stable holding of the connecting pipe 164 and guarantees the spraying effect.

[0046] In some embodiments, the mine water filtration device further includes: a sludge tank 5, a drain outlet 17 at the bottom of the membrane tank 1, the sludge tank 5 being connected to the drain outlet 17 via a sludge pipe 6, and a sewage pump 51 being provided on the sludge pipe 6, the sewage pump 51 being electrically connected to the controller.

[0047] In this embodiment, after the device has been running for a period of time, the sludge deposited at the bottom of the membrane tank 1 needs to be cleaned. At this time, the sludge pump 51 can be started by the controller to pump the sludge in the membrane tank 1 into the sludge tank 5 through the sludge discharge pipe. Then the sludge in the sludge tank 5 is centrally treated, which is fast and efficient, avoids excessive sludge accumulation and pollution of the ultrafiltration membrane 151, and also provides a temporary collection place for sludge.

[0048] To facilitate placement of the device near the underground working face and allow for relocation according to mining progress, in some embodiments, the mine water filtration device further includes a chassis (not shown in the accompanying drawings), with the membrane tank 1, the clear water tank 2, and the sludge tank 5 spaced apart on the chassis. The entire device is integrated onto the chassis, allowing it to be moved to the working position using a forklift, thus increasing its flexibility and reducing its footprint. Furthermore, casters can be installed at the bottom of the chassis to allow for fine-tuning of the device's position by pushing the chassis, making it more suitable for underground environments.

[0049] In some embodiments, the nozzle 161 is a duckbill nozzle 161. The duckbill nozzle 161 can spray a fan-shaped water flow of 10°-120° (or even wider), covering a much larger area than a circular nozzle. Furthermore, by narrowing the outlet width or increasing the internal pressure, a narrow fan-shaped, high-velocity jet can be formed, concentrating the impact force on the surface of the ultrafiltration membrane 151, improving cleaning efficiency, and avoiding the problem of "excessive strength in the center and weakness at the edges" in circular flows. In addition, the flat outlet guiding structure of the nozzle 161 can constrain the fluid direction and reduce splashing waste.

[0050] In summary, the mine water filtration device provided in this embodiment does not require the addition of coagulants. By setting up a spray device to clean the ultrafiltration membrane module 15, membrane fouling can be effectively prevented, ensuring water production efficiency. Furthermore, the device is automatically controlled by a controller, resulting in a faster response speed and more stable system operation compared to manual operation.

[0051] This specification discloses the present application with reference to the accompanying drawings and also enables those skilled in the art to implement the application, including making and using any device or system, employing suitable materials, and using any combination of methods. The scope of this application is defined by the claimed technical solution and includes other instances that would occur to those skilled in the art. Such other instances shall be considered to fall within the scope of protection defined by the claimed technical solution, provided that they include structural elements that are not different from the literal language of the claimed technical solution, or contain equivalent structural elements that are not substantially different from the literal language of the claimed technical solution.

Claims

1. A mine water filtration device, characterized in that, include: Membrane tank, clear water tank, and controller, The membrane tank has an inlet and an outlet, with an inlet pump and an outlet pump respectively installed at the inlet and outlet. A pressure monitor is installed at the outlet. Mine water is connected to the inlet. The membrane tank contains an ultrafiltration membrane module and a cleaning module. The ultrafiltration membrane module has a water production channel inside, which is connected to the outlet. The cleaning module includes a nozzle and a moving component. The nozzle is fixedly mounted on the moving component. The moving component can drive the nozzle to reciprocate horizontally relative to the ultrafiltration membrane module. The spray surface of the nozzle faces the ultrafiltration membrane module. The clear water tank is connected to the outlet through a water production pipe, and the nozzle is connected to the water production pipe. A spray pump is installed on the water production pipe. The inlet pump, the outlet pump, the pressure monitor, the moving component, and the spray pump are all electrically connected to the controller. The controller is configured to determine whether the water production requirements are met based on the water pressure detected by the pressure monitor, and adjust the opening and closing of the inlet pump, the outlet pump, the moving component, and the spray pump accordingly.

2. The mine water filtration device as described in claim 1, characterized in that, The controller is also configured to: When the water pressure detected by the pressure monitor is less than or equal to the set value, the following action is taken: S1. Turn off the inlet pump and the outlet pump, and start the spray pump and the moving component; S2. After controlling the spray pump and the moving component to run for a period of time, turn off the spray pump and the moving component, and restart the inlet pump and the outlet pump to produce water in the second round. When the water pressure detected by the pressure monitor is greater than the set value, the inlet pump and the outlet pump will continue to start and produce water continuously.

3. The mine water filtration device as described in claim 1, characterized in that, The ultrafiltration membrane includes: a plurality of ultrafiltration membranes spaced apart in a horizontal direction, each of the ultrafiltration membranes having a water production path inside, the plurality of water production paths jointly defining the water production channel, the plurality of water production paths being respectively connected to the liquid outlet, and a plurality of cleaning components being provided, the plurality of cleaning components being provided in a one-to-one correspondence with the plurality of ultrafiltration membranes.

4. The mine water filtration device as described in claim 1, characterized in that, The cleaning assembly also includes a connecting pipe that extends vertically and has a water inlet channel. The water production pipe and the nozzle are respectively connected to the water inlet channel, and the connecting pipe is fixedly mounted on the movable assembly.

5. The mine water filtration device as described in claim 4, characterized in that, The nozzle is provided in multiple parts, and the multiple nozzles are connected to the connecting pipe at intervals.

6. The mine water filtration device as described in claim 5, characterized in that, The moving component is a robotic arm, which is electrically connected to the controller.

7. The mine water filtration device as described in claim 6, characterized in that, Two robotic arms are provided, and the two robotic arms respectively clamp the upper and lower ends of the connecting tube.

8. The mine water filtration device as described in claim 1, characterized in that, Also includes: The sludge tank has a sludge outlet at the bottom of the membrane tank. The sludge tank is connected to the sludge outlet through a sludge pipe, and a sludge pump is installed on the sludge pipe. The sludge pump is electrically connected to the controller.

9. The mine water filtration device as described in claim 8, characterized in that, Also includes: The membrane tank, the clear water tank, and the sludge tank are spaced apart on the chassis.

10. The mine water filtration device according to any one of claims 1-9, characterized in that, The nozzle is a duckbill nozzle.

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