Intelligent super-efficiency magnetic disk underground in-situ turbidity removal system

Abstract

The utility model provides an intelligent super-efficiency magnetic disk underground in-situ turbidity removal system, and aims to solve the technical problems of high medicament consumption and energy consumption caused by the fact that the medicament adding amount of existing mine water underground treatment equipment needs to be manually controlled. The system comprises a mine water pretreatment unit, a magnetic coagulation unit, a magnetic disk separation unit, a magnetic recovery unit and a dosing unit which are connected through pipelines, the chemical adding unit comprises a controller, and a water inlet flow meter, a water inlet quality monitor, a water outlet quality monitor, an image acquisition instrument and a chemical adding pump which are respectively in communication connection with the controller; the controller is used for controlling the adding amount of the medicament adding pump according to the measured water inlet flow value, the measured SS value and COD value of the inlet water, the measured SS value and COD value of the outlet water and the measured alumen ustum image of the outlet water. According to the system disclosed by the utility model, underground in-situ treatment of the mine water is realized, an intelligent dosing system is adopted, and when the treatment scale is 2000-30000 m / d, the medicament consumption is saved by more than 20%, and the energy consumption is saved by more than 69%.

Description

Technical Field

[0001] This utility model relates to the field of mine water turbidity removal technology, specifically to an intelligent, high-efficiency disk-based in-situ turbidity removal system. Background Technology

[0002] Mine water refers to wastewater generated during coal mine construction and mining processes, resulting from underground water inflow, surface seepage, and drainage from underground production. It is characterized by diverse water quality types, large fluctuations in quantity and quality, high suspended solids (SS) concentrations that are difficult to settle, and the potential presence of heavy metals, fluorides, and other toxic and harmful substances. Typically, the SS concentration in mine water ranges from several hundred to several thousand mg / L, with some reaching as high as 10,000 mg / L. High-turbidity mine water generally refers to mine water with SS exceeding 500 mg / L. Its suspended solids mainly include coal dust, rock dust, and silt. The primary goal of treating this type of water is to remove SS, achieving a certain level of clarity and water quality standards, so that it can be reused for industrial and domestic use.

[0003] Currently, most coal mine water treatment methods involve pumping wastewater from a central pump house underground to a surface wastewater treatment plant. This process typically requires pumping water hundreds or even thousands of meters high. Due to the high elevation, the central pump power reaches thousands of kilowatts, necessitating multi-stage pumping and resulting in high energy consumption of the high-pressure pumps. Direct underground water treatment, on the other hand, can effectively save energy and reduce operating costs. However, constraints such as underground space, disassembly and transportation, operating conditions, and safety and explosion-proof requirements mean that while conventional coagulation and sedimentation technology can effectively remove suspended solids (SS), it involves long retention times, large equipment footprints, and generates a large amount of sludge. Furthermore, the addition of coagulants and flocculants during coagulation and sedimentation requires manual control, leading to high reliance on manpower and high reagent consumption. This increases operating costs, and the risk of residual pollution from indiscriminate overdosing of reagents further exacerbates the problem.

[0004] Therefore, it is of great significance to study a miniaturized and modular technical equipment with low energy consumption, low reagent consumption and self-controllable technology to achieve highly efficient in-situ turbidity removal treatment of mine water and realize the resource utilization of mine water. Utility Model Content

[0005] The purpose of this invention is to solve the technical problems caused by the large equipment footprint, high energy consumption, large reagent consumption, and inability to achieve unattended operation when existing coagulation sedimentation technology is directly applied to in-situ treatment of mine water. This invention improves upon existing magnetic coagulation separation devices by adding an intelligent dosing system. It incorporates a controller and interconnected components including an inlet flow meter, an inlet water quality monitor, an effluent water quality monitor, an image acquisition device, and a reagent dosing pump. The controller precisely controls the reagent dosing amount based on the flow rate measured by the inlet flow meter, the SS and COD values ​​measured by the water quality monitor, the SS and COD values ​​measured by the effluent water quality monitor, and the floc image of the flocculation tank measured by the image acquisition device, thus achieving unattended operation.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0007] An intelligent, high-efficiency, in-situ turbidity removal system for underground magnetic disks includes a mine water pretreatment unit, a magnetic coagulation unit, a magnetic disk separation unit, a magnetic recovery unit, and a chemical dosing unit connected by pipelines; the chemical dosing unit includes:

[0008] The controller is installed on the control cabinet;

[0009] The inlet flow meter is connected to the controller and is used to monitor the flow rate of the pretreated mine water inlet in real time and feed it back to the controller.

[0010] The influent water quality monitoring instrument is connected to the controller and is used to monitor the SS and COD values ​​of the pretreated mine water influent in real time and feed them back to the controller.

[0011] The effluent water quality monitor is connected to the controller and is used to monitor the SS and COD values ​​of the effluent from the disk separation unit in real time and feed them back to the controller.

[0012] An image acquisition device is connected to the controller and is used to acquire real-time images of floc in the flocculation tank of the magnetic coagulation unit and feed the image results back to the controller.

[0013] The agent dosing pump is connected in communication with the controller and is used to adjust the dosage of the agent based on the feedback SS value, COD value and alum flower image results.

[0014] As a preferred technical solution:

[0015] Optionally, the influent water quality monitoring instrument is installed on the pipeline connecting the pretreatment unit and the magnetic coagulation unit;

[0016] The effluent water quality monitoring instrument is installed on the effluent pipe of the disk separation unit;

[0017] The image acquisition device is installed above the magnetic concrete unit;

[0018] One end of the reagent dosing pump is connected to the reagent storage tank, and the other end is connected to the magnetic coagulation unit, which includes a coagulant dosing pump, a magnetic powder dosing pump, and a coagulant aid dosing pump, all of which are communicatively connected to the controller.

[0019] Optionally, the mine water pretreatment unit includes an underground water tank, an anti-clogging grid cage, and a fine grid cage connected in sequence. The inlet flow meter is installed on the outlet pipe of the fine grid cage and is located in front of the inlet water quality monitoring instrument. In this system, the underground water tank is used to store and regulate mine water. The anti-clogging grid cage is a steel grid with a grid spacing of 20-40 mm, used to prevent large particles such as waste plastic bags, waste oil felt, and waste gloves from entering and clogging the submersible pump. A submersible pump is also installed at the bottom of the anti-clogging grid cage. The fine grid is a steel grid with a grid spacing of 2-10 mm, used to remove some particles and prevent clogging during subsequent treatment.

[0020] Optionally, the anti-clogging grid cage is installed inside the well water tank, the fine grid cage is installed outside the well water tank, and a delivery pump is connected between the anti-clogging grid cage and the fine grid cage.

[0021] Optionally, the magnetic coagulation unit includes a non-powered pipeline mixer, a baffle mixing zone, a primary stirred coagulation tank, and a secondary stirred flocculation tank connected in sequence.

[0022] The disk separation unit includes a disk separator;

[0023] The magnetic recovery unit includes a high-speed deflocculator and a magnetic recovery machine; the sludge outlet of the disk separator is connected to the inlet of the high-speed deflocculator; the high-speed deflocculator sends the deflocculated sludge and magnetic powder to the magnetic recovery machine; the magnetic powder recovered by the magnetic recovery machine is sent to the primary stirred coagulation tank, and the separated sludge is sent to the sludge treatment unit; the magnetic recovery machine is communicatively connected to the controller.

[0024] The reagent storage tank includes a coagulant storage tank, a magnetic powder storage tank, and a coagulant aid storage tank; each reagent storage tank is equipped with a mixing agitator.

[0025] Optionally, the feed end of the coagulant dosing pump is connected to the coagulant storage tank via a pipeline, and the discharge end is connected to the pipeline mixer, for fully mixing the added coagulant with the pretreated mine water;

[0026] The feed end of the magnetic powder dosing pump is connected to the magnetic powder storage tank via a pipeline, and the discharge end is connected to the primary stirred coagulation tank.

[0027] The feed end of the coagulant dosing pump is connected to the coagulant storage tank via a pipeline, and the discharge end is connected to the secondary stirred flocculation tank.

[0028] Optionally, the image acquisition device is installed above the secondary stirred flocculation tank to acquire images of the growth of magnetic flocs in the secondary stirred flocculation tank and transmit the images to the controller, which then controls the dosage of the reagent dosing pump.

[0029] Optionally, the non-powered pipeline mixer refers to a mixer with multiple spiral structures inside, powered by the original booster pump, used for preliminary mixing of coagulant and mine water; the baffle mixing zone is located in the inlet channel of the primary stirred coagulation tank, and the channel is equipped with baffles for non-powered baffle mixing, improving the turbulence of the water flow, making the turbulent movement in the primary stirred coagulation tank more intense, the mixing effect better, and conducive to the collision and adhesion of floc particles, so as to further mix the coagulant and mine water.

[0030] Optionally, the controller is a PLC controller, used to receive the SS value, COD value and influent flow rate, the SS value and COD value of the effluent, and the floc image of the flocculation tank, and control the dosage of the coagulant dosing pump, magnetic powder dosing pump and coagulant aid dosing pump according to the results.

[0031] Optionally, the influent water quality monitor and the effluent water quality monitor employ an absorption spectroscopy multi-parameter water quality analyzer. This analyzer can rapidly measure the ultraviolet-visible full-wavelength absorption spectrum of the water body in real time, and, combined with water quality model algorithms and model calibration parameters, achieve real-time, rapid, automated, and portable monitoring of multiple water quality parameters. Compared to traditional online monitoring instruments that require a reaction time of over 30 minutes when monitoring COD values, which, like manual addition, leads to information feedback delays and overdosing, the absorption spectroscopy multi-parameter water quality analyzer used in this invention provides instantaneous readings and responses, precisely controlling the dosage and avoiding reagent consumption.

[0032] Compared with the prior art, the beneficial effects of this utility model are:

[0033] 1. The intelligent and highly efficient disk well in-situ turbidity removal system of this utility model adopts an intelligent dosing system, that is, by setting up a controller and setting up an influent flow meter, an influent water quality monitor, an effluent water quality monitor, an image acquisition instrument and a chemical dosing pump that are connected to the controller for communication; the controller precisely controls the dosing amount of the chemical dosing pump according to the SS and COD values ​​measured by the influent water quality monitor, the SS and COD values ​​measured by the effluent water quality monitor, and the floc image of the flocculation tank measured by the image acquisition instrument, realizing unmanned operation, reducing the intensity of manual labor and saving more than 20% of chemical consumption;

[0034] 2. This utility model relates to an intelligent, high-efficiency, in-situ downhole turbidity removal system. This system achieves modular, high-efficiency in-situ downhole turbidity removal, with a processing capacity of 2000~30000 m³. 3 / d, stay time 4~6 min, SS reduction of more than 95%;

[0035] 3. The intelligent and efficient disk-based in-situ turbidity removal system of this utility model has the characteristics of fast purification speed, small footprint, short construction period, low operating cost and convenient daily maintenance under complex underground operating conditions. The treated water can be directly reused for dust removal, fire fighting and roadway washing in the mine, etc., which reduces the pumping energy consumption, pump equipment maintenance costs, operating costs and indirect carbon emissions of electricity for pumping mine water to the surface for treatment and reuse. At the same time, it reduces the safety accidents of collapse caused by pumping water. It solves the technical problems of traditional water treatment technology and equipment being unsuitable for direct underground operation, poor intelligent control system capabilities, and inconvenience of equipment failure repair and manual operation and maintenance. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a system flowchart of this utility model;

[0038] Figure 2 This is a schematic diagram of the structure of the device used in the system of this utility model;

[0039] Figure 3 This is a structural diagram of the PLC controller feedback control system of this utility model;

[0040] Figure label:

[0041] 101-Underground water tank; 102-Anti-clogging bar cage; 103-Submersible sewage pump; 104-Fine bar screen; 105-Inlet flow meter; 301-Inlet water quality monitor; 302-Non-powered pipeline mixer; 303-Baffle mixing zone; 304-Baffle; 305-Primary mixing coagulation tank; 306-Double-blade mechanical mixer; 307-Guide cylinder; 308-Secondary mixing flocculation tank; 309-Multi-stage heterogeneous blades; 310-Connecting pipe; 311-High-definition camera Head; 401-High-efficiency disk separator; 402-Hollow disk; 403-Central outlet pipe; 404-Sludge scraper; 405-Screw conveyor; 406-Effluent water quality monitor; 501-High-speed deflocculator; 502-Magnetic drum; 503-Magnetic powder mixing tank; 504-Paddle agitator; 505-Magnetic powder dosing pump; 601-Reagent storage tank; 602-Paddle agitator; 603-Reagent dosing pump; 701-Control cabinet; 702-PLC controller. Detailed Implementation

[0042] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0043] In the description of this utility model, it should be understood that the terms "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] To simplify the disclosure of this invention, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0047] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0048] This utility model embodiment provides an intelligent, high-efficiency disk well in-situ deturbination system, such as Figure 1 As shown, it includes a mine water pretreatment unit, a magnetic coagulation unit, a disk separation unit, a magnetic recovery unit, and a chemical dosing unit connected by pipelines.

[0049] The mine water pretreatment unit includes an underground water tank, an anti-clogging grid cage, and a fine grid cage connected in sequence. A delivery pump is connected between the anti-clogging grid cage and the fine grid cage. An inlet flow meter is also installed on the outlet pipe of the fine grid cage. The inlet flow meter is located in front of the inlet water quality monitoring instrument.

[0050] The magnetic coagulation unit includes a non-powered pipeline mixer, a baffle plate mixing zone, a primary stirred coagulation tank, and a secondary stirred flocculation tank connected in sequence. The non-powered pipeline refers to the internal installation of multiple spiral structures, powered by the original booster pump, used for the initial mixing of coagulant and mine water. The baffle plate mixing zone is located in the inlet channel of the primary stirred coagulation tank, and the channel is equipped with baffles for non-powered baffle mixing.

[0051] The disk separation unit includes a disk separator;

[0052] The magnetic recovery unit includes a high-speed deflocculator and a magnetic recovery machine. The magnetic recovery machine sends the recovered magnetic powder to the primary stirred coagulation tank and sends the separated sludge to the sludge treatment unit. After treatment, the sludge unit returns the filtrate to the primary stirred coagulation tank and transports the sludge off-site.

[0053] The dosing unit includes:

[0054] The controller is installed on the control cabinet;

[0055] The influent water quality monitor is connected to the controller to monitor the SS and COD values ​​of the pretreated mine water in real time and feed them back to the controller. The influent water quality monitor is installed on the pipeline connecting the pretreatment unit and the magnetic coagulation unit, specifically on the pipeline of the fine screen cage outlet. An influent flow meter is also installed on the pipeline of the fine screen cage outlet, in front of the influent water quality monitor. The anti-clogging screen cage is installed inside the underground water tank, and the fine screen cage is installed outside the underground water tank.

[0056] The effluent water quality monitor is connected to the controller and is used to monitor the SS and COD values ​​of the effluent from the disk separation unit in real time and feed them back to the controller. The effluent water quality monitor is installed on the effluent pipeline of the disk separation unit, specifically on the effluent pipeline of the disk separator.

[0057] An image acquisition device, which communicates with the controller, is used to acquire images of flocs in the flocculation tank of the magnetic coagulation unit in real time and feed the image results back to the controller. The image acquisition device is installed above the magnetic coagulation unit, specifically above the secondary stirred flocculation tank, and is used to acquire images of the growth of magnetic flocs in the secondary stirred flocculation tank.

[0058] The chemical dosing pump, communicating with the controller, is used to adjust the dosage of the chemical based on feedback SS values, COD values, and flocculent image results. One end of the chemical dosing pump is connected to the chemical storage tank, and the other end is connected to the magnetic coagulation unit, specifically to the non-powered pipeline mixer, as well as the coagulation mixing tank and the secondary mixing flocculation tank. This includes a coagulant dosing pump, a magnetic powder dosing pump, and a coagulant aid dosing pump, each communicating with the controller. The chemical storage tank includes a coagulant storage tank, a magnetic powder storage tank, and a coagulant aid storage tank; each of these tanks is equipped with a mixing agitator. The feed end of the coagulant dosing pump is connected to the coagulant storage tank via a pipeline, and the discharge end is connected to the non-powered pipeline mixer, used to fully mix the added coagulant with the pretreated mine water; the feed end of the magnetic powder dosing pump is connected to the magnetic powder storage tank via a pipeline, and the discharge end is connected to the primary stirred coagulation tank; the feed end of the coagulant aid dosing pump is connected to the coagulant aid storage tank via a pipeline, and the discharge end is connected to the secondary stirred flocculation tank; the magnetic recovery machine is connected to the controller, specifically the magnetic recovery machine is connected to the magnetic powder dosing pump, and the magnetic powder dosing pump is connected to the controller via a communication link.

[0059] The influent flow meter is communicatively connected to the controller, which is a PLC controller. It receives real-time monitoring data from the influent water quality monitor and the influent flow meter, including SS (suspended solids), COD (coal dioxide), and influent flow rate. The effluent water quality monitor receives real-time monitoring data including SS and COD. An image acquisition device using a high-definition camera is used to monitor the flocculant images in the flocculation tank in real time. Based on the received data, the controller controls the dosage of the coagulant, magnetic powder, and flocculant aid pumps. Both the influent and effluent water quality monitors are absorption spectroscopy multi-parameter water quality analyzers.

[0060] A schematic diagram of the device used in this utility model's intelligent high-efficiency disk well in-situ deturbination system is shown below. Figure 2 As shown, the details are as follows:

[0061] (1) Preprocessing unit

[0062] It includes an underground water tank 101 for storing and regulating mine water, an anti-clogging grating 102 (a steel grating with a grating spacing of 20-40 mm to prevent large particles such as waste plastic bags, waste oil felt, and waste gloves from entering the submersible sewage pump and clogging it), a submersible sewage pump 103, a fine grating 104 (a steel grating with a grating spacing of 2-10 mm to remove some particles and prevent subsequent clogging), and an inlet flow meter 105.

[0063] (2) High-efficiency magnetic concrete unit

[0064] Traditional coagulation mixing tanks consist of three stages: two-stage coagulation and one-stage flocculation, all using parallel paddle mixers with a mixing time of 6.0–10.0 min. This device, designed for in-situ mine water treatment in areas with limited space and requiring minimal floor space, innovatively employs a high-efficiency coagulation mixing tank in two stages: one-stage coagulation (enhanced by a flow guide tube) and one-stage flocculation (differential mixing), with a coagulation time of 4.5–6.0 min, resulting in a smaller footprint. Compared to three-stage coagulation, the coagulation system reduces hydraulic retention time by over 25%, saves over 10% in floor space, reduces energy consumption by over 15%, and lowers equipment costs by over 5%.

[0065] The system includes: an influent water quality monitor 301 (installed on the pipeline, employing an absorption spectroscopy multi-parameter water quality analyzer; real-time rapid measurement of the ultraviolet-visible full-wavelength absorption spectrum of the water body; combined with water quality model algorithms and model calibration parameters; achieving real-time, rapid, automated, and portable monitoring of multiple water quality parameters; real-time monitoring of SS and COD; signal lines connected to control cabinet 701 for transmitting feedback monitoring signals); a non-powered pipeline mixer 302 (equipped with a coagulant dosing port; internal multiple spiral structures to improve mixing effect; used for preliminary mixing of coagulant and mine water); and a baffle mixing zone 303 (with multiple vertically arranged baffles 304 within the flow channel, forming a non-powered baffle mixing system; improving the turbulence of the water flow, resulting in more intense turbulent movement within the reactor, better mixing effect, and facilitating the collision and adhesion of floc particles for further mixing of coagulant and mine water; designed residence time 20-40 seconds). (s), First-stage stirred coagulation tank 305 (containing magnetic powder and magnetic mud returned from magnetic mud lift pump 505, mechanically stirred by double blades 306, with an internal guide tube 307, under mechanical stirring, radial and axial flow can be formed in the guide tube, improving the turbulence of the water flow, making the turbulence in the reactor more intense, maximizing the use of stirring energy, improving the coagulation effect, designed residence time 90~120 s), Second-stage stirred flocculation tank 308 (with multi-level heterogeneous blades 309, the lower blades are large and the upper blades are small, through multi-level differential stirring of different sized blades, flocculation proceeds step by step, the lower end has high stirring intensity, the number of collisions of floc particles is high, and at the same time, the bottom solid particles are washed away to prevent the bottom magnetic powder from settling and caking due to gravity; the upper end has low stirring intensity to prevent the floc from breaking due to the same stirring intensity as the lower end, ensuring stable flocculated effluent, designed residence time 180~240 s). s), connecting pipe 310 (connecting the secondary stirred flocculation tank 308 and the disk separation unit, using gravity to flow the flocculated water to), high-definition camera 311 (i.e., image acquisition device, installed at the upper end of the secondary stirred flocculation tank 308, using particle imaging method to intuitively evaluate the quality of floc growth, that is, to capture the growth of magnetic flocs in real time through the high-definition camera).

[0066] (3) High-efficiency disk separation unit

[0067] Traditional magnetic disks use a solid structure with water entering from one side and exiting from the other. Because magnetic flocs are preferentially attracted to the outermost layer of the disk, most of the magnetic flocs are adsorbed onto the outermost ring, resulting in low disk utilization. Furthermore, they require low rotational speed and high magnetic field strength to operate; otherwise, slag leakage is likely. This device, designed for mines with large water volumes and limited underground space, aims to improve disk separation efficiency and increase throughput. It employs a new high-efficiency disk separator 401, which uses a hollow disk structure and changes the water inlet / outlet flow, allowing water to flow from the outside in. This ensures that the magnetic flocs are first attracted to the outermost magnet and then sequentially to the inner magnets, effectively increasing water throughput, magnet utilization, reducing manufacturing costs, and lightening the overall weight of the equipment. Compared to traditional disks, the water processing capacity is increased by 30%–50%, with a single unit processing up to 30,000 m³. 3 / d (Traditional equipment typically has a single unit processing capacity of 20,000 m³) 3 / d)

[0068] The high-efficiency disk separator 401 includes a hollow disk 402 (with a hollow structure, water inlet on the outer ring, and water outlet in the center), a central water outlet pipe 403, a scraper bar 404 (used to scrape off the magnetic flocs adsorbed on the disk), a spiral conveyor device 405 (used to transport the magnetic flocs scraped off by the scraper bar 404 to the magnetic recovery unit), and an effluent water quality monitor 406 (using an absorption spectroscopy water quality multi-parameter analyzer, mainly to monitor the SS and COD values ​​of the effluent in real time).

[0069] (4) Magnetic recycling unit

[0070] It includes a high-speed deflocculator 501 (with a high-speed dispersing wheel at the center, which uses the rapid rotation of the high-speed dispersing wheel to shear the sludge flocs containing magnetic powder, so as to separate the magnetic powder and sludge), a magnetic drum 502 (used to recover the magnetic powder deflocculated by the high-speed deflocculator 501), a magnetic powder mixing tank 503 (with a paddle agitator 504 inside, used to stir and mix the magnetic powder recovered by the magnetic drum 502; the magnetic powder is also stirred and mixed by this device during initial addition or replenishment during operation), and a magnetic powder addition pump 505 (a wear-resistant pump).

[0071] (5) Dosing unit and intelligent control

[0072] It includes a reagent storage tank 601, a paddle agitator b 602, and two reagent dosing pumps 603 (one for coagulant and one for coagulant aid).

[0073] The control cabinet 701 and PLC controller 702 transmit in-water flow rate, in-water and out-of-water SS and COD data to the PLC controller in real time. They are connected to the in-water quality monitor, the out-of-water quality monitor, and the image acquisition device (high-definition camera). They also work in conjunction with the high-efficiency magnetic coagulation unit, the disk separation unit, and the magnetic recovery unit. The control cabinet is equipped with a one-button start-stop function, which can realize one-button start and stop. After shutdown, the magnetic powder on the disk is automatically recovered for the next use.

[0074] The PLC controller can perform intelligent dosing based on feedback from influent and effluent water quality (primarily SS, meaning the dosing amount can be set according to the SS value; for example, when the magnetic powder dosage is 2-4 times the influent SS, the SS removal effect is better; COD is secondary, meaning the influent and effluent COD values ​​can be used to determine whether the downstream process can proceed to ultrafiltration membrane for deep treatment). The structure of the PLC controller feedback control system is as follows: Figure 3 As shown.

[0075] Addressing the challenges of limited underground space, complex operating conditions, and inconvenient manual maintenance, this invention, based on the actual conditions and treatment needs of underground mine water treatment, reduces reagent consumption by over 20% and avoids the risks of residual pollution caused by blindly overdosing reagents during manual dosing. Taking a project with a treatment capacity of 10,000 m³ / d as an example, under the premise of ensuring effluent quality, the original system required 292 tons / year of PAC and 7.3 tons / year of PAM dosing by manual dosing. After adopting this intelligent underground dosing system, the PAC dosing is reduced to 219 tons / year and the PAM dosing to 5.475 tons / year, saving 73 tons of PAC and 1.825 tons of PAM, respectively, representing a reduction of approximately 20%. The manual dosing of PAC requires more than that of this invention, thus demonstrating that this invention helps save reagent dosage and significantly reduces operating costs.

[0076] The intelligent, high-efficiency disk separation in-situ turbidity removal system of this invention can treat mine water with a capacity of 1700 m³. 3 / d. The average COD of the raw influent is approximately 102 mg / L, and the average SS is approximately 1230 mg / L; the average COD of the produced water is approximately 50 mg / L, and the average SS is approximately 30 mg / L. This fully realizes intelligent underground treatment of mine water. The main indicators of its effluent quality are SS < 25 mg / L and COD < 50 mg / L. It can be used for underground fire fighting and sprinkler water (meeting the "Design Code for Underground Fire Fighting and Sprinkler Water in Coal Mines" GB50383, with suspended solids particle size ≤ 0.3 mm) and underground coal washing and equipment cooling water (meeting the "Design Code for Coal Washing and Processing Engineering" GB50359, with SS ≤ 50 mg / L). It can be directly recycled underground.

[0077] Taking into account the depth of coal mines, underground water consumption, energy consumption of hoisting pumps, and energy consumption of high-efficiency magnetic disk separation equipment in my country, this study investigates the energy consumption of underground water treatment and reuse modes (direct treatment of mine water by high-efficiency magnetic disk separation equipment + reuse) and above-ground water treatment and reuse modes (underground pump hoisting + high-efficiency magnetic disk separation + reuse) to determine the energy-saving and emission-reduction advantages of high-efficiency magnetic disk separation equipment for underground water treatment and reuse. Comparative analysis shows that the main energy consumption above ground is the energy consumption of hoisting pumps and mine water treatment equipment, while underground it is mainly the energy consumption of the mine water treatment equipment. The newly developed high-efficiency magnetic disk separation equipment has multiple models with water treatment and reuse capacities ranging from 1000 to 30000 m³. 3 / d, based on the commonly used recycled water volume of 100~2000m³ in domestic mines 3 / h, then choose 2000 m 3 The research object is / d. The installed power of this model of equipment is 23 kW, the operating power is 19 kW, and the operating energy consumption of the water treatment equipment is equal to the operating power * T1 (T1 represents the time for the recycled water volume to be treated).

[0078] There are three commonly used main drainage pumps in mines (MD280-43*7, flow rate: 280 m³ / h). 3 / h, Head: 301 m; MD360-95*6, Flow rate: 360 m³ / h 3 / h, Head: 524 m; MD450-95*6, Flow rate: 450 m³ / h 3 / h, head: 524 m), for recycled water volume, model MD280-43*7 can be selected for comparison. When the head is insufficient, multiple pumps can be used in series or gradually increased. The actual delivery power to the surface pump can be calculated using the following formula:

[0079] N=k*Q*H*ρ* / 102 / η

[0080] Where N represents the motor power in kW; k represents the motor overload factor, typically 1.2; Q represents the water lifting capacity in L / s; H represents the lifting height in m; ρ represents the specific gravity of the lifted liquid in kg / L (1.0 kg / L for water); and η represents the overall efficiency of the pump, typically 0.65.

[0081] Energy consumption for water pump boosting = N * T2

[0082] Where T2 represents the time for the increase of recycled water volume, in hours.

[0083] Therefore, the formula for calculating the energy saving E from direct downhole water treatment and reuse is as follows:

[0084] E = *100%

[0085] Based on the different coal mine depths, underground water consumption, and hoisting pump energy consumption in China, this study targets commonly used equipment models in domestic underground mines, specifically those with a capacity of 2000 m. 3 / d (water treatment capacity 0~2000 m³) 3 / d) The energy savings from direct downhole water treatment and reuse are shown in the table below:

[0086] As shown in the table above, compared to the mine water treatment mode, the direct underground treatment and reuse mode can significantly reduce the overall system energy consumption, by more than 69%. Therefore, adopting the system of this invention not only helps to reduce operating costs but also improves the sustainability of mine operations and reduces environmental impact.

Claims

1. An intelligent, high-efficiency, in-situ disk deturbination system, characterized in that: It includes a mine water pretreatment unit, a magnetic coagulation unit, a disk separation unit, a magnetic recovery unit, and a chemical dosing unit connected by pipelines; the chemical dosing unit includes: The controller is installed on the control cabinet; The inlet flow meter is connected to the controller and is used to monitor the flow rate of the pretreated mine water inlet in real time and feed it back to the controller. The influent water quality monitoring instrument is connected to the controller and is used to monitor the SS and COD values ​​of the pretreated mine water influent in real time and feed them back to the controller. The effluent water quality monitor is connected to the controller and is used to monitor the SS and COD values ​​of the effluent from the disk separation unit in real time and feed them back to the controller. An image acquisition device is connected to the controller and is used to acquire real-time images of floc in the flocculation tank of the magnetic coagulation unit and feed the image results back to the controller. The agent dosing pump is connected to the controller and is used to adjust the dosage of the agent based on the feedback SS value, COD value and alum flower image results.

2. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 1, characterized in that, The influent water quality monitoring instrument is installed on the pipeline connecting the pretreatment unit and the magnetic coagulation unit; The effluent water quality monitoring instrument is installed on the effluent pipe of the disk separation unit; The image acquisition device is installed above the magnetic concrete unit; One end of the reagent dosing pump is connected to the reagent storage tank, and the other end is connected to the magnetic coagulation unit, which includes a coagulant dosing pump, a magnetic powder dosing pump, and a coagulant aid dosing pump, all of which are communicatively connected to the controller.

3. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 2, characterized in that: The mine water pretreatment unit includes an underground water tank, an anti-clogging grid cage, and a fine grid cage connected in sequence. The inlet flow meter is installed on the outlet pipe of the fine grid cage and is installed in front of the inlet water quality monitoring instrument.

4. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 3, characterized in that: The anti-clogging grid cage is installed inside the underground water tank, and the fine grid cage is installed outside the underground water tank. A delivery pump is also connected between the anti-clogging grid cage and the fine grid cage.

5. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 2, characterized in that: The magnetic coagulation unit includes a non-powered pipeline mixer, a baffle mixing zone, a primary stirred coagulation tank, and a secondary stirred flocculation tank connected in sequence. The disk separation unit includes a disk separator; The magnetic recovery unit includes a high-speed deflocculator and a magnetic recovery machine; the sludge outlet of the disk separator is connected to the inlet of the high-speed deflocculator; the high-speed deflocculator sends the deflocculated sludge and magnetic powder to the magnetic recovery machine; the magnetic powder recovered by the magnetic recovery machine is sent to the primary stirred coagulation tank, and the separated sludge is sent to the sludge treatment unit; the magnetic recovery machine is communicatively connected to the controller. The reagent storage tank includes a coagulant storage tank, a magnetic powder storage tank, and a coagulant aid storage tank; each reagent storage tank is equipped with a mixing agitator.

6. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 5, characterized in that: The feed end of the coagulant dosing pump is connected to the coagulant storage tank via a pipeline, and the discharge end is connected to the pipeline mixer, which is used to fully mix the added coagulant with the pretreated mine water. The feed end of the magnetic powder dosing pump is connected to the magnetic powder storage tank via a pipeline, and the discharge end is connected to the primary stirred coagulation tank. The feed end of the coagulant dosing pump is connected to the coagulant storage tank via a pipeline, and the discharge end is connected to the secondary stirred flocculation tank.

7. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 5, characterized in that: The image acquisition device is installed above the secondary stirred flocculation tank to acquire images of the growth of magnetic flocs in the secondary stirred flocculation tank and transmit the images to the controller.

8. The intelligent, high-efficiency disk well downhole in-situ deturbination system according to claim 5, characterized in that: The non-powered pipeline mixer is equipped with multiple spiral structures inside, using the original booster pump power as the power source, for the initial mixing of coagulant and mine water; the baffle plate mixing zone is located in the inlet channel of the primary mixing coagulation tank, and the channel is equipped with baffles for non-powered baffle mixing.

9. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 2, characterized in that: The controller is a PLC controller, used to receive the SS value, COD value and influent flow rate of the influent, the SS value and COD value of the effluent, and the floc image of the flocculation tank, and to control the dosage of the coagulant dosing pump, magnetic powder dosing pump and coagulant aid dosing pump according to the results.

10. The intelligent, high-efficiency disk well in-situ deturbination system according to claim 1, characterized in that: The influent water quality monitoring instrument and the effluent water quality monitoring instrument are both absorption spectroscopy water quality multi-parameter analyzers.

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