Underground in-situ quality-divided resourceful treatment system for mine water

Abstract

The utility model provides a mine water underground in-situ quality-divided resourceful treatment system which aims at solving the problems that an existing device is large in occupied area, low in filtering performance and incapable of achieving quality-divided resourceful treatment. The system comprises an enhanced pretreatment unit, a mechanical filtering unit, a deep treatment unit and a strong brine underground sealing unit which are sequentially communicated through pipelines. The strengthening pretreatment unit is arranged underground and is used for carrying out super-efficiency magnetic disk separation and turbidity removal treatment on large-particle substances in mine water underground; the mechanical filtering unit is arranged underground and is used for continuously filtering the produced water treated by the enhanced pretreatment unit through a two-stage filter; the deep treatment unit is arranged underground and is used for continuously performing UF or MF, RO and disinfection treatment on the produced water; and the strong brine treatment unit is arranged underground and is used for sealing and storing the strong brine underground. The system disclosed by the utility model can realize underground in-situ quality-divided treatment, so that water treatment at different stages meets different water quality requirements, and the quality-divided resourceful treatment requirements are met.

Description

TECHNICAL FIELD

[0001] The utility model relates to mine water treatment technical field, concretely relates to a mine water in-situ quality resource treatment system. BACKGROUND

[0002] Mine water refers to the wastewater produced by the collection of underground gushing water, surface seepage water and underground production drainage during the process of coal mine construction and coal mining, which has the characteristics of various water quality types, large fluctuation of water quantity and quality, high salt content (TDS), high concentration of suspended solids (SS) which is not easy to settle, possible heavy metals, fluoride and other toxic and harmful substances. If mine water is not treated or improperly treated, it will cause a series of environmental problems, thereby threatening the ecological system and human health. Therefore, the reasonable resource recycling of mine water after treatment and purification meets the needs of ecological environment and social economic development in China.

[0003] Most of the mine water treatment methods of coal mines are to lift the wastewater from the central sump to the ground sewage plant for wastewater purification treatment through the central pump house sewage pump in the mine. It usually needs to be lifted by several hundred meters or even thousands of meters. Due to the high lifting height, the power of the central water pump is as high as thousands of kilowatts, which needs multi-stage lifting. The high-pressure lifting pump has problems such as high energy consumption and high failure rate. The mine water treatment adopts the mode of direct treatment in the mine, which can save the electric energy and water resource tax required for water lifting and effectively save energy and reduce operating costs. However, due to the constraints of underground space, disassembly and transportation, operating conditions, safety and explosion prevention conditions, conventional sewage treatment technology and equipment cannot be directly applied to the underground mine. It is a big problem to realize the in-situ treatment and reuse of mine water by environmental protection equipment. At present, the main processes applied in the underground mine include coagulation sedimentation, sand filtration, activated carbon filtration, UF and magnetic separation, etc. However, there are also a series of problems: coagulation sedimentation can effectively remove SS, but the residence time is long, the equipment occupies a large area, a large amount of sludge is generated, and the manpower dependence is high, which is not suitable for operation in the mine; sand filtration has good filtration performance and can effectively remove large particle SS, but has problems such as poor water quality, easy to be cemented, and complicated replacement of filter material; activated carbon filtration has good adsorption filtration performance and can effectively remove small particles and colloids, but has problems such as short service life of activated carbon, easy to be cemented, and complicated replacement; UF has high automation degree and good treatment effect, and the produced water can be reused, but has problems such as low flux of membrane module and high investment cost.

[0004] Therefore, it is a technical problem to be solved at present to develop a system which can be applied to in-situ pretreatment technology in the underground mine to realize the quality utilization of mine water resources. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a purpose is to solve the present equipment because the in-situ treatment of underground is difficult, the filtering efficiency is low and the problem that the mine water quality resource utilization cannot be realized efficiently, through the setting of the key technology and the equipment of the in-situ turbidity removal treatment of super efficiency disk separation mine water, high flux UF membrane assembly and underground intensive equipment and RO membrane pollution accurate cleaning, realize the safe, efficient treatment and reuse of mine water.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A kind of mine water in-situ quality resource processing system, including enhanced pretreatment unit, mechanical filtration unit, depth processing unit and concentrated brine underground storage unit that pipeline is connected in turn;

[0008] The enhanced pretreatment unit is arranged in underground, for the in-situ turbidity removal treatment of super efficiency disk separation of large particle material in mine water in underground, make water meet the water quality requirement of underground coal washing, flushing roadway and construction water;

[0009] The mechanical filtration unit is arranged in underground, for the water of enhanced pretreatment unit is sequentially transported to the mechanical filtration unit by lifting pump, make water meet the water quality requirement of underground coal washing, equipment cooling water and dust fall, fire fighting, flushing roadway and construction water;

[0010] The depth processing unit is arranged in underground, for UF or MF, RO and disinfection treatment to the water of mechanical filtration unit, make the water after UF meet the demand of drum shearer, heading machine spray water, make the water after disinfection meet the water quality requirement of underground high pressure spray, drinking water;

[0011] The concentrated brine underground storage unit is arranged in underground, for the underground storage or lifting to the surface of concentrated brine concentrated by RO membrane and processing disposal, when processing disposal, need to entrust to the unit with corresponding qualification.

[0012] As preferred technical scheme:

[0013] A kind of mine water in-situ quality resource processing system as described above, the enhanced pretreatment unit includes super efficiency disk separator, the super efficiency disk separator includes grid cage, coagulation mixing pool, flocculation mixing pool, disk separator and magnetic recovery machine that are sequentially communicated along mine water processing flow direction;The grid cage includes coarse grid cage, middle grid cage and fine grid cage that are sequentially connected along mine water processing flow direction, cyclone sand separator is further installed after the fine grid cage.

[0014] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0015] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0016] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0017] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0018] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0019] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0020] The mine water in-situ treatment system comprises a mechanical filtration unit, a deep treatment unit, a concentrated brine underground storage unit and a concentrated brine underground storage unit.

[0021] Compared with the prior art, the beneficial effects of the mine water in-situ treatment system are as follows:

[0022] The mine water in-situ quality separation and resource treatment system in the mine adopts small, modular and intelligent equipment, realizes direct treatment and reuse in the mine, effectively reduces power consumption for lifting, saves water resource exploitation cost and the like, and is suitable for a scale of 100-2000 m 3 / d.

[0023] The mine water in-situ quality separation and resource treatment system in the mine adopts the reinforced pretreatment, which is beneficial to reducing wear and failure of the high-pressure pump and also can reduce lifting energy consumption, after filtration of large-particle solids by the grid, turbidity removal by the super-efficient magnetic disk, wide flux, fast purification speed, less land occupation, short construction period, low operation cost, convenient daily maintenance, unattended and the like are realized, the whole set of equipment stays for 4-6 min, SS is reduced by more than 95%, the equipment is used for water treatment and reuse in the mine, the system saves energy consumption by more than 69%, and intelligent low carbon, wide flux and fast purification under complex operation conditions in the mine are realized.

[0024] The mine water in-situ quality separation and resource treatment system in the mine adopts a high-flux UF membrane treatment device with a membrane area of 80 m 2 The pressure type UF membrane treatment device has greater water production, higher integration and smaller land occupation, greatly reduces system configuration and installation cost, and is particularly prominent for land shortage and large-scale mine water treatment projects in the mine, has low operation energy consumption, low pretreatment requirement, good water quality, long service life and simple maintenance, treats mine water with an average flux of more than 60 LMH, produces water with a turbidity of less than 1 NTU, and is stable under the condition of TDS>40000 mg / L, can be applied to treatment in the mine, and the treated water can be reused as high-pressure spray water, dustproof and fire-fighting water in the mine, flushing roadway water, drinking water in the mine and the like. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0026] Figure 1 It is a structure schematic view of the mine water in-situ quality separation and resource treatment system in the embodiment 1 of the present application.

[0027] Figure 2 It is the intelligent dosing system structure schematic view of the super-efficient disk separator in the utility model system;

[0028] Reference signs:

[0029] 1 - reinforced pretreatment unit; 101 - super-efficient disk separator; 2 - mechanical filtration unit; 3 - advanced treatment unit; 301 - UF / MF device; 302 - RO device; 303 - disinfection treatment device; 4 - concentrated brine underground storage unit; 5 - delivery pump. DETAILED DESCRIPTION

[0030] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0031] The terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features.

[0032] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated;It can be mechanical connection, or electrical connection, or communication;It can be directly connected, or indirectly connected through intermediate medium, or it can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0034] The embodiments of the utility model will be described in detail below with reference to the drawings.

[0035] A mine water in-situ quality-based resource treatment system in a mine shaft, comprising a reinforced pretreatment unit 1, a mechanical filtration unit 2, a deep treatment unit 3 and a concentrated brine underground storage unit 4 connected in sequence by pipelines, as shown in Figure 1 .

[0036] The reinforced pretreatment unit 1 is arranged in the mine shaft and comprises a super-efficient magnetic disk separator 101 for performing super-efficient magnetic disk separation and turbidity removal of large-particle substances in the mine water in the mine shaft. The super-efficient magnetic disk separator comprises a grid cage, a coagulation mixing tank, a flocculation mixing tank, a magnetic disk separator, a high-speed deflocculator and a magnetic recovery machine connected in sequence along the mine water treatment flow direction. The grid cage is installed in the water sump in the mine shaft and comprises a coarse grid cage, a medium grid cage and a fine grid cage connected in sequence along the mine water treatment flow direction. Different specifications of the grid cages remove large-particle residues of different sizes. A cyclone sand separator is further installed behind the fine grid cage. Figure 2 The super-efficient magnetic disk separator adopts an intelligent dosing system, as shown in , i.e. through real-time monitoring by a PLC control system, the water inflow measured by an inflow flowmeter, the SS value and COD value measured by an inflow and outflow water quality monitor, and the alum flower image of the flocculation tank measured by an image collector are used to accurately control the dosing amount of the magnetic powder, coagulant and flocculant dosing pumps.

[0037] The mechanical filtration unit 2 is arranged in the mine shaft and connected behind the super-efficient magnetic disk separator by a pipeline. The mechanical filtration unit 2 comprises a quartz sand filter, an activated carbon filter or a fiber filter. When the mechanical filtration unit is a combination of two or three filters, the two or three filters are connected in series by the same or different filters, Figure 1 , as shown in the middle of the drawing, which is a two-stage mechanical filter connected in series by two mechanical filters. The treated water after the mine water is filtered by the super-efficient magnetic disk separator and the two-stage or three-stage mechanical filter meets the requirements of GB50359 “Coal Washing Engineering Design Specification” and can be used for underground coal washing, equipment cooling water, dust reduction, firefighting, flushing of roadways and construction water. The measured water quality meets the requirements of GB50359 “Coal Washing Engineering Design Specification” that SS≤50 mg / L and total hardness≤500 mg / L.

[0038] The depth processing unit 3 is arranged underground and comprises a membrane processing device and a disinfection processing device 303, which are used for UF or MF, RO and disinfection processing of the water produced by the mechanical filtration unit, so that the water produced meets the water quality requirements of the drum shearer, the heading machine spray and underground high-pressure spray and drinking water, wherein the membrane processing device comprises an UF / MF device 301 and an RO device 302, and is divided into a one-stage membrane processing device, a two-stage membrane processing device or a three-stage membrane processing device, the one-stage membrane processing device comprises one-stage UF+one-stage RO or one-stage MF+one-stage RO, the two-stage membrane processing device comprises two-stage UF+two-stage RO or two-stage MF+two-stage RO, and the three-stage membrane processing device comprises three-stage UF+three-stage RO or three-stage MF+three-stage RO Figure 1 Only the structure of the one-stage membrane processing device is shown, and the structures of the two-stage membrane processing device and the three-stage membrane processing device can be increased according to Figure 1 The filtering membrane in the UF or MF device adopts an inorganic ceramic membrane or an organic material membrane; and the RO membrane in the RO device adopts one or more of a brackish water RO membrane, a seawater RO membrane or a high-pressure RO membrane.

[0039] The concentrated brine underground storage unit 4 is arranged underground and is a water storage tank body, which is connected with a delivery pump 5 through a pipeline, the delivery pump is a high-pressure delivery pump, and the stored concentrated brine is lifted to the ground or injected into an underground space for storage, and the underground space is selected from abandoned goaf or underground water storage space, and these regions have natural water barriers or safe storage environments formed by building water barrier sealing walls.

[0040] The delivery pump 5 is connected between the reinforced pretreatment unit 1, the mechanical filtration unit 2, the depth processing unit 3 and the concentrated brine underground storage unit 4 through a pipeline, that is, the water produced by each processing unit is delivered by the delivery pump when flowing to the next processing unit.

[0041] The mine water underground in-situ quality-based resource utilization process and method has the advantages that super-efficient magnetic disk separation mine water in-situ processing, high-flux UF membrane processing device components and high-efficiency RO desalination key technologies are adopted, can be applied to the underground in-situ processing and resource utilization process of high-salt mine water or high-turbidity mine water, and has a wide application prospect.

[0042] The technical problems that the traditional water treatment technology and equipment are not suitable for direct underground operation, the intelligent control system has poor capability, equipment fault maintenance and manual operation and maintenance are inconvenient and the like are solved; the technical problems that the effective filtration area of a single membrane processing device component is low, the processing efficiency is low, the UF processing effect of mine water is not clear and the like are effectively solved; and the technical problems that the RO membrane pollution mechanism of high-turbidity and high-salt mine water is not clear, the membrane pollution is serious, the service life is relatively low and scaling and the like are effectively solved.

[0043] Application Example 1: Mine water underground resource utilization project of a mine in Shandong

[0044] The water production scale is 3600 m 3 The influent suspended solids are less than or equal to 800 mg / L, the TDS is less than or equal to 2000 mg / L, and the produced water meets the water quality for high-pressure spraying of fully-mechanized mining equipment, emulsified oil water distribution and underground fire sprinkling (meets GB50383 “Coal Mine Underground Fire and Sprinkling Design Specification”), the turbidity is less than or equal to 5 NTU, the suspended particle size is less than 0.3 mm, and the TDS is less than 1000 mg / L.

[0045] Application Example 2: Underground resource utilization project of mine water in a mine in Shaanxi

[0046] The water production scale is 7200 m 3 The raw water is water in a mine water sump, and the depth-treated effluent meets the water quality for high-pressure spraying of fully-mechanized mining equipment, emulsified oil water distribution and underground fire sprinkling (meets GB50383 “Coal Mine Underground Fire and Sprinkling Design Specification”), the turbidity is less than or equal to 5 NTU, the suspended particle size is less than 0.3 mm, and the TDS is less than 1000 mg / L.

Claims

1. A mine water in-situ fractionation and resource recovery system, characterized in that, It includes an enhanced pretreatment unit, a mechanical filtration unit, an advanced treatment unit, and a concentrated brine underground storage unit, all connected by sequential pipelines. The enhanced pretreatment unit is located underground and is used to perform high-efficiency disk separation and turbidity removal treatment on large particulate matter in mine water, so that the produced water meets the water quality requirements for underground coal washing, roadway flushing and construction water. The mechanical filtration unit is installed underground and is used to sequentially transport the produced water from the enhanced pretreatment unit to the mechanical filtration unit via a booster pump, so that the produced water meets the water quality requirements for underground coal washing, equipment cooling water, dust suppression, fire fighting, roadway flushing, and construction water. The deep treatment unit is located underground and is used to continue to treat the water produced by the mechanical filtration unit with UF or MF, RO and disinfection, so that the water after UF meets the water requirements of the drum coal mining machine and the tunneling machine spray water, and the water after disinfection meets the water quality requirements of underground high-pressure spray and drinking water. The concentrated brine underground storage unit is located underground and is used to store the concentrated brine after RO underground or to lift it to the surface for external transportation and treatment.

2. The mine water in-situ fractionation and resource recovery system according to claim 1, characterized in that, The enhanced pretreatment unit includes an ultra-efficient disk separator, which comprises a grid cage, a coagulation mixing tank, a flocculation mixing tank, a disk separator, and a magnetic recovery machine connected sequentially along the mine water treatment flow direction; the grid cage comprises a coarse grid cage, a medium grid cage, and a fine grid cage connected sequentially along the mine water treatment flow direction, and a cyclone sand setter is also installed after the fine grid cage.

3. The mine water in-situ fractionation and resource recovery system according to claim 2, characterized in that, The mechanical filtration unit includes a quartz sand filter, an activated carbon filter, or a fiber filter. When the mechanical filtration unit is a combination of two or three filters, the two or three filters are the same or different filters connected in series.

4. The mine water in-situ fractionation and resource recovery system according to claim 1, characterized in that, The deep processing unit includes a membrane processing device and a disinfection processing device.

5. A mine water in-situ fractionation and resource recovery system according to claim 4, characterized in that, The membrane treatment device includes a UF or MF device and an RO device, and is divided into a single-stage membrane treatment device, a two-stage membrane treatment device, or a three-stage membrane treatment device. The single-stage membrane treatment device includes a single-stage UF or a single-stage MF + a single-stage RO device. The two-stage membrane treatment device includes two-stage UF or two-stage MF + two-stage RO devices. The three-stage membrane treatment device includes three-stage UF or three-stage MF + three-stage RO devices.

6. A mine water in-situ fractionation and resource recovery system according to claim 5, characterized in that, The filter membrane in the UF or MF device is an inorganic ceramic membrane or an organic material membrane; the RO membrane in the RO device is one or more of a brackish water RO membrane, a seawater RO membrane, or a high-pressure RO membrane.

7. A mine water in-situ fractionation and resource recovery system according to claim 1, characterized in that, The concentrated brine underground storage unit is a water storage tank, which is then connected to a high-pressure delivery pump via pipeline. This pump is used to lift the stored concentrated brine to the ground or inject it into an underground space for storage. The underground space is selected from abandoned mining areas or underground water storage spaces. These areas have natural waterproof layers or can be constructed with waterproof and airtight walls to form a safe storage environment.

8. A mine water in-situ fractionation and resource recovery system according to claim 1, characterized in that, The enhanced pretreatment unit, mechanical filtration unit, deep treatment unit, and concentrated brine underground storage unit are all connected by pipelines to a delivery pump.

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