Coal mine acid water treatment device and treatment method

Abstract

The present application provides a coal mine acid water treatment device and treatment method, relates to the technical field of mine water treatment equipment. Including: first processing assembly, second processing assembly and third processing assembly, the first processing assembly, the second processing assembly and the third processing assembly are all provided with mixing assembly and grading assembly; the mixing assembly includes a mixing hopper, the mixing hopper includes a medicine inlet and a mixing part, the inclination of the inner side of the mixing part is greater than that of the medicine inlet, the mixing hopper is used for guiding the acid mine water and the medicine to form vortex mixing and introducing air; the grading assembly includes a mixing pool and a grading pool, the mixing pool is used for mixing the mine water in the mixing hopper, and the grading pool is used for depositing and stratifying the mine water in the mixing pool; compared with the prior art, the mine water and the medicine can be effectively mixed, the water quality fluctuation of the mine water can be reduced after treatment, the dosing accuracy can be increased, the reaction efficiency can be improved, and the processing cost can be reduced.

Description

Technical Field

[0001] This invention relates to the field of mine water treatment equipment technology, and more specifically, to a coal mine acidic water treatment device and treatment method. Background Technology

[0002] To achieve the "dual carbon" goal, the country is promoting the transformation of its energy structure towards clean and low-carbon energy, reducing its dependence on coal. After a large number of coal mines were shut down due to policy reasons, the historical legacy mines have been producing a large amount of acidic mine water in an oxidizing environment, causing environmental pollution to downstream surface water bodies and agricultural planting areas.

[0003] Based on the characteristics of pollutants in mine water, mine water is generally classified into: conventional mine water, high-mineralization mine water, acidic mine water, and specially polluted mine water. Among them, acidic mine water is a major source of pollution in coal mines. Its formation mainly stems from the chemical and biological reactions of pyrite (FeS2) in an oxidizing environment to produce sulfuric acid, resulting in a pH value below 6. This type of water is rich in heavy metals such as iron, aluminum, and manganese, as well as sulfate ions, and is highly corrosive. It can damage mining equipment, pollute surface and groundwater, seriously affect coal mining operations, and threaten the ecological environment.

[0004] Currently, the commonly used method for treating acidic mine water is chemical dosing. However, due to the special characteristics of acidic mine water, conventional dosing devices cannot effectively adapt to extreme conditions such as high acidity, high suspension, and unstable voltage. Most existing acidic mine water chemical treatment devices enhance the mixing of acidic mine water and treatment chemicals by incorporating a stirring mechanism, which can improve reaction efficiency to some extent. However, existing dosing devices have poor emergency response capabilities, mostly relying on dosage based solely on the influent flow rate. When the mine water quality changes abruptly, the system cannot automatically adjust the reagent ratio, leading to excessive effluent or overdosing, increasing treatment costs. Furthermore, in environments with highly suspended mine water, existing devices are prone to localized blockages, affecting and damaging equipment components, reducing treatment efficiency, and increasing maintenance costs.

[0005] Therefore, there is an urgent need for a coal mine acid water treatment device and method to solve the aforementioned problems of water quality changes and suspended blockage in acid mine water treatment. Summary of the Invention

[0006] The purpose of this invention is to provide a coal mine acid water treatment device that can effectively mix mine water and chemicals, reduce mine water quality fluctuations through treated return water, increase dosing accuracy, improve reaction efficiency, and reduce treatment costs.

[0007] The embodiments of the present invention are implemented as follows: This invention provides a coal mine acidic water treatment device, comprising a primary treatment component, a secondary treatment component, and a tertiary treatment component. Each of the primary, secondary, and tertiary treatment components includes a mixing component and a grading component. The mixing component includes a mixing hopper, which further includes a chemical inlet and a mixing section. The inclination of the inner surface of the mixing section is greater than that of the inner surface of the chemical inlet. The mixing hopper guides the acidic mine water and chemicals to form a vortex mixture and introduces air. The grading component includes a mixing tank and a grading tank. The mixing tank receives and mixes the mine water from the mixing hopper, while the grading tank receives and precipitates the mine water from the mixing tank. The chemical inlet is equipped with a monitoring component and a chemical dosing component. The monitoring component monitors the water quality and quantity at the chemical inlet, while the chemical dosing component adds chemicals. A first outlet is located at the top of the grading tank, a second outlet is located in the middle of the grading tank, and a third outlet is located at the bottom of the grading tank. The first outlet of the primary treatment component, the first outlet of the secondary treatment component, and the second outlet of the secondary treatment component are connected to the mixing component of the tertiary treatment component via pipelines. The third outlet of the primary treatment component is connected to the mixing component of the secondary treatment component via pipelines. The second outlet of the primary treatment component is equipped with a return water structure connected to the mixing component of the primary treatment component. The return water structure draws back the treated mineral water to stabilize the mineral water quality. The third outlet of the secondary and tertiary treatment components discharges sludge, and the first and second outlets of the secondary and tertiary treatment components discharge qualified mineral water.

[0008] In some embodiments of the present invention, the inner side of the mixing section is provided with a plurality of inclined protrusions, which are uniformly arranged around the central axis of the mixing section. The inclined protrusions are used to promote the formation of eddies in the mineral water and introduce air. The inclined protrusions are inclined and bent downward along the inner side of the mixing section, and the angle of inclination of the inclined protrusions relative to the horizontal line is 30°-40°.

[0009] In some embodiments of the present invention, a heating component is provided on the outside of the mixing section. The heating component heats the mixing section to raise the temperature of the mineral water and the drug, thereby promoting their mixing with the internal air. The temperature of the mixing section is 32°C-36°C.

[0010] In some embodiments of the present invention, a mixing section is provided on the front side of the drug inlet corresponding to the above-mentioned primary processing component. The mixing section is provided with a water inlet and a water filling inlet, and the return water structure is connected to the water filling inlet.

[0011] In some embodiments of the present invention, the cross-section of the mixing tank is circular, which is used to cooperate with the mixing bucket to introduce a vortex of mineral water for rotation; a rotating component is provided inside the mixing tank to provide power for the continuous rotation of the mineral water.

[0012] In some embodiments of the present invention, a layered mesh is provided in the grading tank. The layered mesh is located below the second outlet and is used to assist in the stable sedimentation of mineral water in the grading tank. The layered mesh includes multiple mesh lines arranged side by side, and the length direction of the mesh lines is consistent with the drainage direction of the grading tank.

[0013] The present invention also aims to provide a method for treating acidic coal mine water, which can treat and classify acidic mine water, and through multi-stage treatment after stratification, the overall quality of the mine water is stabilized, effectively ensuring the efficiency of drug reaction and avoiding precipitation blockage.

[0014] This invention provides a method for treating acidic water in coal mines, specifically including the following steps: The ore water to be treated enters the primary treatment unit and is treated with chemicals to obtain primary treated ore water. The primary-processed mineral water is subjected to stratified treatment to obtain top-layer mineral water, middle-layer mineral water, and bottom-layer mineral water. The intermediate layer mineral water is fed into the mixing component of the primary treatment unit through a return water structure. The return water from the intermediate layer mineral water stabilizes the mineral water quality and makes full use of the residual chemicals. The bottom mineral water enters the secondary treatment unit and is treated with chemicals to obtain secondary treated mineral water; The secondary treated mineral water is treated in layers, with the top and middle layers being the end-of-pipe mineral water and the bottom layer being sludge. The top layer of the end-of-pipe mineral water and the primary-treated mineral water are mixed and fed into the tertiary treatment unit, where chemicals are added for tertiary treatment to obtain tertiary-treated mineral water. The secondary treated mineral water is treated in layers, with the top and middle layers being the final mineral water and the bottom layer being sludge.

[0015] In some embodiments of the present invention, in the above steps, both the primary and secondary treatments heat the mineral water and guide it to form a vortex. The vortex introduces air and promotes air integration and drug reaction through heating.

[0016] In some embodiments of the present invention, in the above steps, the matching rates of the added drugs and water quality in the primary treatment, secondary treatment and tertiary treatment are 96%, 92% and 100%, respectively.

[0017] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects: Existing chemical dosing devices mostly employ a single treatment method, relying on stirring structures to enhance mixing and aid in the mixing of mine water and treatment chemicals. However, they are ineffective in handling extreme conditions such as high acidity, high suspension, and unstable voltage, and react slowly to changes in mine water quality, making it difficult to adjust the reagent ratio. This invention, by incorporating a mixing hopper, ensures thorough mixing of the reagent and mine water during the addition of neutralizing / precipitating agents such as lime, sodium hydroxide, or iron salts. This effectively prevents excessively high local concentrations or uneven distribution of the reagent, significantly optimizing the overall chemical reaction. Simultaneously, the funnel structure creates a vortex during the vortex formation process, allowing for thorough air incorporation. This enables powerless, high-efficiency, and corrosion-resistant pre-oxidation, actively oxidizing ferrous ions (Fe2+). 2+ ) is trivalent iron (Fe) 3+ This significantly optimizes the subsequent neutralization and sedimentation processes. Furthermore, when air mixes into the mineral water to form microbubbles, which are then introduced into the mixing tank via the funnel vortex structure, the microbubbles are more evenly distributed and have finer particle sizes. This increases the probability of contact between the bubbles and contaminants, accelerating the sedimentation efficiency of the mixed mineral water and facilitating its sedimentation and classification in the classification tank. The inclusion of a return water pipe and a pump allows for the extraction and mixing of the classified mineral water with the untreated mineral water. This not only effectively stabilizes the mineral water quality and protects the equipment but also effectively utilizes residual chemicals for reaction, avoiding chemical waste.

[0018] This invention provides a method for treating acidic coal mine water, comprising the following steps: introducing the mine water to be treated and adding chemicals for primary treatment to obtain primary treated mine water; performing stratified treatment on the primary treated mine water to obtain top layer mine water, middle layer mine water, and bottom layer mine water; feeding the middle layer mine water into the mixing component of step two through a return water structure, stabilizing the mine water quality and making full use of residual chemicals through the return water of the middle layer mine water; adding chemicals for secondary treatment on the bottom layer mine water to obtain secondary treated mine water; performing stratified treatment on the secondary treated mine water to obtain end mine water and sludge; mixing the top layer mine water and end mine water, and adding chemicals for tertiary treatment to obtain qualified treated mine water; the chemical addition, mixing, and sedimentation stratification processes are the same for the primary, secondary, and tertiary treatments.

[0019] This invention effectively increases drug utilization through a multi-stage, layered treatment method, and reduces the probability of sediment blockage, equipment component damage, and device lifespan by reducing the probability of precipitate blockage. By further processing the treated mineral water in layers, it can be recycled, significantly reducing water consumption during the treatment process. Furthermore, mixing the treated mineral water with the untreated mineral water for dilution and mixing effectively stabilizes the water quality, reduces fluctuations, avoids exceeding effluent standards or overdosing, and lowers treatment costs. Pretreatment and homogenization of the drug before addition ensures improved reaction efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a flowchart illustrating the implementation of an embodiment of the present invention; Figure 2 This is a cross-sectional view of the mixing tank according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the mixing section according to an embodiment of the present invention; Figure 4 This is a cross-sectional view of the grading pool according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of the anti-caking component according to an embodiment of the present invention.

[0022] Icons: 1. Medicine inlet; 2. Mixing section; 3. Water mixing section; 4. Heating component; 5. Mixing tank; 6. Opening and closing sealing door; 7. Rotating component; 8. Inclined convex strip; 9. Grading tank; 10. First outlet; 11. Opening; 12. Second outlet; 13. Third outlet; 14. Layered mesh; 15. Positioning rod; 16. Anti-caking component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0025] Example: Please refer to Figure 1-5This embodiment provides a coal mine acidic water treatment device, which includes a primary treatment component, a secondary treatment component, and a tertiary treatment component. Each of the primary, secondary, and tertiary treatment components is equipped with a mixing component and a grading component. The mixing component includes a mixing hopper, which comprises a chemical inlet 1 and a mixing section 2. The inclination of the inner surface of the mixing section 2 is greater than that of the inner surface of the chemical inlet 1. The mixing hopper is used to guide the acidic mineral water and chemicals to form a vortex mixture and to introduce air. The grading component includes a mixing tank 5 and a grading tank 9. The mixing tank 5 is used to collect mineral water from the mixing hopper for mixing, and the grading tank 9 is used to collect mineral water from the mixing tank 5 for sedimentation and stratification. The chemical inlet 1 is equipped with a monitoring component and a chemical dosing component. The monitoring component is used to monitor the water quality and quantity of the chemical inlet 1, and the chemical dosing component is used to add chemicals. A first outlet 10 is provided on the top side of the grading tank 9, a second outlet 12 is provided in the middle of the grading tank 9, and a third outlet 13 is provided at the bottom of the grading tank 9. The first outlet 10 corresponding to the primary treatment component, the first outlet 10 and the second outlet 12 corresponding to the secondary treatment component are connected to the mixing component corresponding to the tertiary treatment component through pipelines. The third outlet 13 corresponding to the primary treatment component is connected to the mixing component corresponding to the secondary treatment component through pipelines. The second outlet 12 corresponding to the primary treatment component is provided with a return water structure connected to the mixing component corresponding to the primary treatment component. The return water structure draws back the treated mineral water to stabilize the mineral water quality. The third outlet 13 corresponding to the secondary and tertiary treatment components discharges sludge, and the first outlet 10 and the second outlet 12 corresponding to the secondary and tertiary treatment components discharge qualified mineral water.

[0026] Existing chemical dosing devices mostly employ a single treatment method, relying on stirring structures to enhance mixing and aid in the mixing of mine water and treatment chemicals. However, they are ineffective in handling extreme conditions such as high acidity, high suspension, and unstable voltage, and react slowly to changes in mine water quality, making it difficult to adjust the reagent ratio. This invention, by incorporating a mixing hopper, ensures thorough mixing of the reagent and mine water during the addition of neutralizing / precipitating agents such as lime, sodium hydroxide, or iron salts. This effectively prevents excessively high local concentrations or uneven distribution of the reagent, significantly optimizing the overall chemical reaction. Simultaneously, the funnel structure creates a vortex during the vortex formation process, allowing for thorough air incorporation. This enables powerless, high-efficiency, and corrosion-resistant pre-oxidation, actively oxidizing ferrous ions (Fe2+). 2+ ) is trivalent iron (Fe) 3+ This significantly optimizes the subsequent neutralization and precipitation processes; furthermore, the reduced density of the mineral water incorporating air bubbles makes it easier to separate from the precipitate. It is understood that both the mineral water and the drug enter tangentially through the drug entry point 1 and in the same direction.

[0027] When air is mixed into the mineral water to form microbubbles, which are then introduced into the mixing tank 5 via a funnel-shaped vortex structure, the microbubbles are more evenly distributed and have a finer particle size. This increases the probability of contact between the bubbles and pollutants, accelerating the sedimentation efficiency of the mixed mineral water and facilitating its sedimentation and classification in the classifying tank 9. Microbubbles can not only adhere to light floating matter such as oils, organic flocs, and sulfide colloids, forming "gas-solid complexes" that float to the liquid surface, but also adsorb with flocs such as Fe(OH)3 and Al(OH)3 to form gas flocs. This prevents fine particles from being suspended for a long time due to Brownian motion, significantly shortening the residence time in the sedimentation tank. Furthermore, the continuous oxygen supply from microbubbles maintains aerobic conditions, inhibits denitrification gas production, reduces the risk of sludge floating, and improves effluent stability. The inclination of the inner surface of the mixing section 2 is greater than that of the inner surface of the chemical inlet section 1, allowing for better accelerated flow mixing and the formation of vortices through the mixing section 2.

[0028] Specifically, the return water structure can be selected as a return water pipe and a pumping power unit or other common structural settings on the market. This allows the graded mineral water to be pumped out and guided to be mixed with the untreated mineral water. This not only effectively stabilizes the mineral water quality and protects the equipment through mixing, but also effectively utilizes the residual chemicals for reaction, avoiding chemical waste. Furthermore, the mineral water mixed with microbubbles can not only accelerate sedimentation, but also help it rise in the return water pipe, saving pumping power.

[0029] In some embodiments of the present invention, a plurality of inclined protrusions 8 are provided on the inner surface of the mixing section 2. These inclined protrusions 8 are uniformly arranged around the central axis of the mixing section 2. The inclined protrusions 8 are used to promote the formation of eddies in the slurry and to introduce air. The inclined protrusions 8 are inclined downwards along the inner surface of the mixing section 2, with an angle of inclination of 30°-40° relative to the horizontal line. Through the inclined protrusions 8 on the inner surface of the mixing section 2, when the slurry and the drug enter the mixing section 2 through the drug inlet 1, they can flow along the inclined protrusions 8, assisting in the formation of eddies while simultaneously promoting the mixing of the slurry and the drug through contact with the inclined protrusions 8. The angle of inclination of the inclined protrusions 8 relative to the horizontal line is 30°-40°, which allows them to effectively guide the slurry to form eddies and effectively reduce the falling speed of the slurry, preventing a decrease in the amount of air introduced and the degree of drug mixing due to excessively rapid falling.

[0030] Furthermore, the multiple inclined protrusions 8 are provided in multiple layers, and the angle of inclination of the multiple inclined protrusions 8 relative to the horizontal line gradually decreases from top to bottom. This allows them to better convert gravitational potential energy into horizontal kinetic energy when the mineral water flows along the inner side of the mixing section 2 and the inclined protrusions 8, thereby accelerating the formation of eddies and rotational speed, increasing the falling time, and increasing the air introduction efficiency and mixing efficiency.

[0031] In some embodiments of the present invention, a heating component 4 is provided on the outer side of the mixing section 2. The heating component 4 heats the mixing section 2 to raise the temperature of the mineral water and the pharmaceuticals, promoting their mixing with the internal air. The temperature of the mixing section 2 is 32℃-36℃. By heating the mineral water and the pharmaceuticals, the nucleation and growth rate of hydroxide flocs such as Fe(OH)3 and Al(OH)3 can be accelerated, the settling time can be shortened, the sedimentation rate can be increased, the sludge moisture content can be reduced, and subsequent treatment can be facilitated. The temperature setting of 32℃-36℃ can effectively avoid the volatilization and decomposition of pharmaceuticals caused by excessively high temperatures while providing heating effect, and avoid accelerated corrosion of the device. It is understood that the heating component 44 can be selected from commonly available structures. Furthermore, the device can use inclined protrusions 88 for heat transfer and conduction to enhance the heating effect.

[0032] In some embodiments of the present invention, a mixing section 3 is provided on the front side of the drug inlet 1 corresponding to the primary treatment component. The mixing section 3 is provided with an inlet and a filling inlet, and the return water structure is connected to the filling inlet. The mixing section 3 allows the mineral water to be mixed with the treated graded mineral water, stabilizing the water quality, reducing water quality fluctuations, facilitating the monitoring components installed in the mixing section 3 to monitor and add drugs accordingly, and effectively preventing untreated mineral water from directly contacting the monitoring components, increasing equipment lifespan and reducing maintenance costs. It is understood that the monitoring components may include devices such as electromagnetic flowmeters, pH sensors, conductivity meters, and spectrophotometers for measuring the flow rate and water quality of the mineral water.

[0033] In some embodiments of the present invention, the mixing tank 5 has a circular cross-section to facilitate the introduction of a vortex of mineral water into the mixing hopper for rotation. A rotating assembly is installed within the mixing tank 5 to provide power for the continuous rotation of the mineral water. If static mixing is used alone, the concentration of reagents in the mixed mineral water may be excessively high or unevenly distributed locally, resulting in fine precipitate particles, slow settling, and low treatment efficiency. The present invention uses a rotating assembly to create a controllable vortex to assist in the reaction. The circular cross-section of the mixing tank 5 ensures that the flow of the vortex formed by the mixed mineral water entering the mixing tank 5 through the mixing hopper is not obstructed within the mixing tank 5, allowing it to continue rotating due to inertia, reducing energy consumption. Simultaneously, the rotating assembly allows for the continuous formation of vortices, promoting the reaction of the mineral water and reagents. Specifically, the rotating assembly may include a rotating component 7 with a U-shaped longitudinal section. The two sides and bottom of the rotating component 7 are close to the inner wall and bottom of the mixing tank 5, forming a vortex during rotation and preventing sedimentation at the bottom and adsorption on the inner wall. The rotating component 7 is equipped with a driving assembly to drive its rotation. A connection port can be provided on one side of the mixing tank 5, which connects to the classifying tank 9 and is equipped with an opening and closing sealing gate 6. This allows the mineral water to enter the classifying tank 9 after it has fully reacted in the mixing tank 5, through the opening and closing sealing gate 6. Furthermore, the gap between the rotating component 7 and the inner wall and bottom of the mixing tank 5 is 1cm-3cm. It is understood that the classifying tank 9 is provided with an opening 11 connected to the connection port.

[0034] In some embodiments of the present invention, a layered mesh 14 is provided in the grading tank 9, located below the second outlet 12, to assist in the stable sedimentation of the mineral water in the grading tank 9. The layered mesh 14 includes multiple mesh lines arranged side by side, with the length direction of the mesh lines consistent with the drainage direction of the grading tank 9. The layered mesh 14, with multiple mesh lines arranged side by side, can help stabilize the mineral water in the grading tank 9, reduce the impact of its flow on sedimentation, and reduce turbulence caused by its contact with the mineral water, without affecting sedimentation and preventing sediment from accumulating on the layered mesh 14. Furthermore, a positioning rod 15 is provided on one side of the layered mesh 14, and an anti-caking component 16 is provided on the layered mesh 14. One end of the anti-caking component 16 is slidably connected to the positioning rod 15, and the mesh lines pass through the wire holes provided on the anti-caking component 16. A driving component is provided on the positioning rod 15 to drive the anti-caking component 16 to move along the direction of the positioning rod 15. By moving the anti-caking component 16, the sediment accumulated on the mesh lines can be effectively cleaned, preventing it from affecting sedimentation and stratification.

[0035] The present invention also aims to provide a method for treating acidic coal mine water, which can treat and classify acidic mine water, and through multi-stage treatment after stratification, the overall quality of the mine water is stabilized, effectively ensuring the efficiency of drug reaction and avoiding precipitation blockage.

[0036] This invention provides a method for treating acidic water in coal mines, specifically including the following steps: The ore water to be treated enters the primary treatment unit and is treated with chemicals to obtain primary treated ore water. The primary-processed mineral water is subjected to stratified treatment to obtain top-layer mineral water, middle-layer mineral water, and bottom-layer mineral water. The intermediate layer mineral water is fed into the mixing component of the primary treatment unit through a return water structure. The return water from the intermediate layer mineral water stabilizes the mineral water quality and makes full use of the residual chemicals. The bottom mineral water enters the secondary treatment unit and is treated with chemicals to obtain secondary treated mineral water; The secondary treated mineral water is treated in layers, with the top and middle layers being the end-of-pipe mineral water and the bottom layer being sludge. The top layer of the end-of-pipe mineral water and the primary-treated mineral water are mixed and fed into the tertiary treatment unit, where chemicals are added for tertiary treatment to obtain tertiary-treated mineral water. The secondary treated mineral water is treated in layers, with the top and middle layers being the final mineral water and the bottom layer being sludge.

[0037] It is understandable that the mixing and grading components are basically the same as those in the primary treatment when performing secondary and tertiary treatment, but the return water structure set in grading tank 9 is not working or is not set.

[0038] This invention improves reaction efficiency by pre-treating and homogenizing the drug before its addition. By further stratifying and reprocessing the treated mineral water, it enables recycling, significantly reducing water consumption during the treatment process. Furthermore, mixing the treated mineral water with the untreated water effectively stabilizes water quality, reduces fluctuations, prevents excessive effluent or overdosing, and lowers treatment costs. This multi-stage stratified treatment method effectively increases drug utilization and reduces the probability of sediment blockage, minimizing equipment component damage and extending the device's lifespan.

[0039] In some embodiments of the present invention, both the primary and secondary treatments involve heating the mineral water and guiding it to form a vortex. The vortex introduces air, and the heating further promotes air integration and drug reaction. By heating the mineral water and forming a vortex, sufficient drug reaction is ensured, and the introduction of air to form microbubbles promotes the reaction and facilitates subsequent sedimentation and fractionation.

[0040] In some embodiments of the present invention, the matching rates of the added drugs and water quality in the primary, secondary, and tertiary treatments are 96%, 92%, and 100%, respectively. The amount of drug added in the primary treatment is 96% of the corresponding water quality rating, the amount added in the secondary treatment is 92% of the corresponding water quality rating, and the amount added in the tertiary treatment is 100% of the corresponding water quality rating. The sedimentation times in the grading tank 9 in the primary, secondary, and tertiary treatments are 3-5 minutes, 2-4 minutes, and 6-8 minutes, respectively, and are adjusted according to the water quality monitored in the corresponding mixing components. The 96% matching rate in the primary treatment avoids excessive drug addition due to systematic errors caused by sensor delays when the mineral water quality changes abruptly. The relatively short secondary treatment time not only shortens the overall treatment time and improves treatment efficiency, but also, with a 92% matching rate, facilitates the full reaction of residual drugs in the mineral water, avoiding impact on subsequent treatments. The 100% matching rate and 6-8 minutes of treatment time in the tertiary treatment ensure the final treatment process is fully carried out, guaranteeing the mineral water treatment effect. Furthermore, a controller can be set up to regulate the entire device.

[0041] Specifically, using the first set of mixing and grading components, the treatment chemicals are pretreated, and the mineral water to be treated is monitored. Both are simultaneously added to the chemical inlet 1 of the mixing hopper, where they form a vortex through the mixing section 2 and are heated before entering the mixing tank 5. After the reaction is carried out by the rotating component 7, the water enters the grading tank 9 for sedimentation. After sedimentation, the top layer mineral water is discharged from the first outlet 10, the middle layer mineral water is discharged from the second outlet 12, and the bottom layer mineral water is discharged from the third outlet 13. The middle layer mineral water enters the mixing section 3 through the return water pipe and mixes with the mineral water to be treated. Using the second set of mixing and grading components, the bottom layer mineral water undergoes secondary treatment, and the final mineral water and sludge are obtained through the grading tank 9. The sludge is collected for further treatment. Using the third set of mixing and grading components, the top layer mineral water and the final mineral water undergo tertiary treatment to obtain qualified mineral water and sludge.

[0042] In summary, embodiments of the present invention provide a coal mine acidic water treatment device and method. By setting up a mixing hopper, the present invention ensures thorough mixing of the reagents with the mine water through a vortex when neutralizing / precipitating agents such as lime, sodium hydroxide, or iron salts are added. This effectively avoids excessively high local concentrations or uneven distribution of the reagents, significantly optimizing the entire chemical reaction. Simultaneously, during the vortex formation process between the reagents and the mine water, the funnel structure creates a vortex to ensure sufficient air mixing, achieving a non-powered, highly efficient, and corrosion-resistant pre-oxidation process that can actively oxidize ferrous ions (Fe²⁺). 2+ ) is trivalent iron (Fe) 3+This significantly optimizes the subsequent neutralization and sedimentation processes. Furthermore, when air mixes with the mineral water to form microbubbles, which are then introduced into the mixing tank 5 via a funnel-vortex structure, the microbubbles are more evenly distributed and have finer particle sizes. This increases the probability of contact between the bubbles and contaminants, accelerating the sedimentation efficiency of the mixed mineral water and facilitating its entry into the classification tank 9 for sedimentation and classification. The inclusion of a return water pipe and a pump allows for the extraction and guidance of the classified mineral water to be mixed with the pre-treated mineral water. This not only effectively stabilizes the mineral water quality and protects the equipment but also effectively utilizes residual chemicals for the reaction, avoiding chemical waste. This invention improves reaction efficiency by pre-treating and homogenizing the chemicals before addition. By stratifying and re-treating the treated mineral water, it allows for recycling, significantly reducing water consumption during the treatment process. Moreover, mixing the treated mineral water with the pre-treated mineral water effectively stabilizes the mineral water quality, reduces fluctuations, prevents excessive effluent or over-dosing, and lowers treatment costs. The multi-level stratified treatment method effectively increases drug utilization and reduces the probability of precipitate blockage, thereby reducing damage to equipment components and increasing the service life of the device.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A coal mine acidic water treatment device, characterized in that, The system includes a primary treatment component, a secondary treatment component, and a tertiary treatment component. Each of these components is equipped with a mixing component and a grading component. The mixing component includes a mixing hopper, which comprises a drug inlet section and a mixing section. The inner surface of the mixing section has a greater inclination than the inner surface of the drug inlet section. The mixing hopper guides acidic mineral water and chemicals to form a vortex mixture and introduces air. The grading component includes a mixing tank and a grading tank. The mixing tank receives mineral water from the mixing hopper for mixing, and the grading tank receives mineral water from the mixing tank for sedimentation and stratification. The drug inlet section is equipped with a monitoring component and a dosing component. The monitoring component monitors the water quality and quantity in the drug inlet section, and the dosing component adds chemicals. The grading tank has a first outlet at its top, a second outlet at its middle, and a third outlet at its bottom. The first outlet of the primary treatment component, the first outlet of the secondary treatment component, and the second outlet of the tertiary treatment component are connected to the mixing component of the tertiary treatment component via pipes. The third outlet of the primary treatment component is connected to the mixing component of the secondary treatment component via a pipe. The second outlet of the primary treatment component has a return water structure connected to the mixing component, which returns the treated mineral water to stabilize its quality. The third outlet of the secondary and tertiary treatment components discharges sludge, while the first and second outlets of the secondary and tertiary treatment components discharge qualified mineral water.

2. The coal mine acidic water treatment device according to claim 1, characterized in that, The inner side of the mixing section is provided with a plurality of inclined protrusions, which are evenly arranged around the central axis of the mixing section. The inclined protrusions are used to promote the formation of eddies in the mineral water and introduce air. The inclined protrusions are inclined and bent downward along the inner side of the mixing section, and the angle of inclination of the inclined protrusions relative to the horizontal line is 30°-40°.

3. The coal mine acidic water treatment device according to claim 2, characterized in that, A heating component is provided on the outside of the mixing section. The heating component heats the mixing section to raise the temperature of the mineral water and the drug, promoting their mixing with the internal air. The temperature of the mixing section is 32℃-36℃.

4. The coal mine acidic water treatment device according to claim 1, characterized in that, A mixing section is provided on the front side of the drug inlet corresponding to the primary processing component. The mixing section is provided with a water inlet and a water filling inlet, and the return water structure is connected to the water filling inlet.

5. The coal mine acidic water treatment device according to claim 1, characterized in that, The mixing tank has a circular cross-section, which is used to cooperate with the mixing bucket to introduce a vortex of mineral water for rotation; the mixing tank is equipped with a rotating component to provide power for the continuous rotation of the mineral water.

6. The coal mine acidic water treatment device according to claim 1, characterized in that, The grading tank is equipped with a layered mesh, which is located below the second outlet to assist in the stable sedimentation of mineral water in the grading tank. The layered mesh includes multiple mesh lines arranged side by side, and the length direction of the mesh lines is consistent with the drainage direction of the grading tank.

7. A method for treating acidic water in coal mines, characterized in that, The treatment of acidic coal mine water using the processing apparatus according to any one of claims 1-6 specifically includes the following steps: The ore water to be treated enters the primary treatment unit and is treated with chemicals to obtain primary treated ore water. The primary-processed mineral water is subjected to stratified treatment to obtain top-layer mineral water, middle-layer mineral water, and bottom-layer mineral water. The intermediate layer mineral water is fed into the mixing component of the primary treatment unit through a return water structure. The return water from the intermediate layer mineral water stabilizes the mineral water quality and makes full use of the residual chemicals. The bottom mineral water enters the secondary treatment unit and is treated with chemicals to obtain secondary treated mineral water; The secondary treated mineral water is treated in layers, with the top and middle layers being the end-of-pipe mineral water and the bottom layer being sludge. The top layer of the end-of-pipe mineral water and the primary-treated mineral water are mixed and fed into the tertiary treatment unit, where chemicals are added for tertiary treatment to obtain tertiary-treated mineral water. The secondary treated mineral water is treated in layers, with the top and middle layers being the final mineral water and the bottom layer being sludge.

8. The method for treating acidic coal mine water according to claim 7, characterized in that, In the above steps, both the primary treatment and the secondary treatment heat the mineral water and guide it to form a vortex. The vortex introduces air and promotes air integration and drug reaction through heating.

9. The method for treating acidic coal mine water according to claim 7, characterized in that, In the above steps, the matching rates of the added drugs and water quality in the primary treatment, secondary treatment, and tertiary treatment are 96%, 92%, and 100%, respectively.

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