CN116375238A - High-suspended-matter high-rock-powder mine water treatment system and method - Google Patents
High-suspended-matter high-rock-powder mine water treatment system and method Download PDFInfo
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- CN116375238A CN116375238A CN202211614758.5A CN202211614758A CN116375238A CN 116375238 A CN116375238 A CN 116375238A CN 202211614758 A CN202211614758 A CN 202211614758A CN 116375238 A CN116375238 A CN 116375238A
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- 238000000034 method Methods 0.000 title claims abstract description 35
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- 238000004062 sedimentation Methods 0.000 claims abstract description 67
- 239000000701 coagulant Substances 0.000 claims abstract description 66
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- 230000001112 coagulating effect Effects 0.000 claims abstract description 18
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- 238000007599 discharging Methods 0.000 claims description 6
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- 239000000725 suspension Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 3
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 239000010419 fine particle Substances 0.000 claims description 3
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 3
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- 239000013049 sediment Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 2
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- 230000016615 flocculation Effects 0.000 description 10
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- 239000005708 Sodium hypochlorite Substances 0.000 description 6
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 6
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- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
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- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 230000003000 nontoxic effect Effects 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
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- 238000004064 recycling Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a high-suspended-matter high-rock-powder mine water treatment system, which uses a secondary coagulating sedimentation process, wherein particles taking coal dust as a main body in water are destabilized and coagulated to form flocs in the first coagulating process, the precipitation is removed, and a coagulant newly added in the second coagulating process causes the rock powder particles to be destabilized and coagulated to form the flocs, and simultaneously, the residual micro flocs in the first coagulating sedimentation are further adsorbed, contacted and collided, and contacted with the residual micro particles in flocculated raw water, so that the removal of suspended matters is enhanced.
Description
Technical Field
The invention relates to a mine water treatment system with high suspended matters and high rock powder.
Background
In the coal exploitation process, a large amount of mine water is generated side by side, and if the mine water is treated and reused, not only is the water resource environment maintained, but also the current situation of water resource shortage is relieved.
The mine water mainly comes from underground water which is influenced by exploitation and enters a roadway, and has obvious coal industry characteristics due to comprehensive influence of hydrogeological conditions, hydrodynamics, geochemistry, mineral deposit geological structure, exploitation method, human activities and other factors. According to the characteristics of pollutants contained in mine water, the mine water is generally divided into clean mine water, mine water containing suspended matters, high-mineralization mine water, acidic mine water and mine water containing special pollutants. The mine water containing suspended matters is mainly, the suspended matters content is generally less than 500mg/L, the mine water is called conventional mine water, and the suspended matters content is more than 500mg/L, and the mine water containing suspended matters is called high suspended matters.
The existing high-suspended-matter mine water treatment technology mainly comprises a traditional flocculation technology, a super-magnetic separation technology and a heavy-medium coagulation sedimentation technology. The traditional flocculation technology is the technology most applied at present, and is directed to the process of adding flocculating agent and coagulant aid into water body to realize suspended matter sedimentation. The super-magnetic separation technology is to add magnetic seeds (magnetic powder) into a water body based on the original traditional flocculation technology, and separate sludge containing the magnetic seeds by magnetic force. The heavy medium coagulation sedimentation technology is to add a high-density medium into water on the basis of the original traditional flocculation technology, so as to accelerate sedimentation. Although the existing high-suspension mine water treatment means are numerous, the treatment effect of the high-suspension high-rock powder mine water is poor.
CN102502933a discloses a coagulating sedimentation treatment system for highly turbid mine water, which is formed by sequentially communicating a rapid mixing zone, a advection sedimentation zone, a slow mixing zone, a reaction zone and an inclined plate sedimentation zone. The rapid mixing zone is provided with a flocculant PAM configuration system, the slow mixing zone is provided with a flocculant PAC configuration system, the inclined plate sedimentation zone adopts a labyrinth inclined plate sedimentation tank, and the inclined plate is made of nontoxic polyvinyl chloride materials, and the multistage deceleration stirring system is designed to improve the removal effect of later-stage stable suspended matters.
CN114873704a discloses a high turbidity coal mine underground mine water pretreatment device, which comprises a barrel, a water pumping pipe is arranged in the barrel, a slag hole is arranged at the bottom of the barrel, a cover body is arranged on the barrel, a turntable is arranged at the top of the cover body, a pipe body component is arranged on the turntable, and a plurality of spiral sheets are arranged at the bottom of the turntable.
CN112939169a discloses a system and a treatment method for treating high suspended matter mine water by coal gangue sand medium, comprising a water inlet unit and a treatment unit, wherein the treatment unit comprises a mixing tank, a feeding tank, a growing tank and a sedimentation tank which are sequentially connected, a water outlet of the water inlet unit is connected with a water inlet of the mixing tank, a coagulant feeding subsystem is arranged above the mixing tank, a flocculant feeding subsystem, a coal gangue sand multiplexing subsystem and a coal gangue sand supplementing subsystem are arranged above the feeding tank, a sludge discharge hopper is arranged at the bottom of the sedimentation tank, the coal gangue sand multiplexing subsystem is connected with the sludge discharge hopper, and a water outlet is arranged at the upper part of the side wall of the sedimentation tank.
CN 109534553A discloses a system and a method for treating high-suspended-matter mine water, the provided system comprises an adjusting tank, a water inlet pump, a coagulator and a purifier which are connected in sequence by water pipes; the bottom of the purifier is connected with a sludge storage pool, and the top of the purifier is connected with a water producing pool; the purifier is a cyclone purifier, and the purifier carries out secondary cyclone centrifugal separation on mine water through downward cyclone and upward cyclone successively.
CN 108911228A discloses a system and process for purifying water under a high suspended matter mine well, which comprises a water sand separation system, an oil-water separation system, a pre-sedimentation adjusting system, a loading coagulation system, a rapid sedimentation clarifier, a filter press and an electric control system which are connected in sequence.
CN 213652082U discloses a high suspended matter mine water purifying device, which comprises an adjusting tank, a flocculating agent adding unit, a sodium hypochlorite adding unit, a slag slurry tank and a liquid inlet pump, a dissolved gas reactor, an air floatation settler, a surface filter and a clear liquid tank which are sequentially connected with the adjusting tank; the flocculant adding unit comprises a flocculant configuration groove and a flocculant delivery pump, and the flocculant configuration groove is connected with the air floatation settler through the flocculant delivery pump; the sodium hypochlorite adding unit comprises a sodium hypochlorite configuration groove and a sodium hypochlorite delivery pump, and the sodium hypochlorite configuration groove is connected with the surface filter through the sodium hypochlorite delivery pump; the slurry tank is connected with a slurry outlet of the surface filter and a slurry outlet of the air floatation settler.
CN 212403767U discloses a treatment system for supplementing water to circulating water of a power plant, wherein a water outlet of a water inlet pipe of the mine water is communicated with an inlet of a high-efficiency flocculation tank through an oil skimming pre-sedimentation regulating tank, an outlet of a coagulant adding device and an outlet of a coagulant adding device are communicated with a dosing port of the high-efficiency flocculation tank, an outlet of the high-efficiency flocculation tank is communicated with an inlet of an inclined tube clarification tank, a supernatant outlet of the inclined tube clarification tank is communicated with an inlet of a gravity valveless filter, an outlet of the gravity valveless filter and an outlet of a bactericide adding device are communicated with an inlet of a clean water tank, and an outlet of the clean water tank is communicated with a water inlet of a cooling tower.
The existing technology well solves the treatment effect of high suspended matters, but a large amount of high suspended matters and high rock powder mine water can be generated in the initial stage of coal mining and the change process of a mining layer, and the existing technology has poor coagulation effect on the high suspended matters and the high rock powder mine water due to the large chemical characteristic difference of coal dust and rock powder, so that a large amount of mine water adopts the conventional treatment technology to turn white the effluent quality, a large amount of rock powder in water is difficult to remove, and a large amount of coagulant and coagulant aid are needed to achieve the expected treatment effect, so that the development of a new treatment technology has important practical significance.
Disclosure of Invention
The invention provides a technical scheme capable of effectively treating mine water in order to solve the technical problems.
In a first aspect, a high suspended matter high rock powder mine water treatment system is provided, including first mixing pipeline, regulation sedimentation tank, second mixing pipeline, clarification tank and the filtering ponds that set gradually, wherein, the front end of first mixing pipeline and second mixing pipeline all is equipped with the dosing pipeline of dosing coagulant and coagulant aid. The regulating sedimentation tank is provided with a water absorbing well and a lifting pump which are connected with the second mixing pipeline. And the regulating sedimentation tank and the clarification tank are both connected with the sludge treatment tank.
During use, mine water is discharged from underground and enters the first mixing pipeline, meanwhile, coagulant and coagulant aid are added into the first mixing pipeline through the dosing pipeline, sewage is mixed with the coagulant aid and the coagulant aid to generate flocs, water then enters the regulating sedimentation tank, large suspended particles and formed flocs particles are removed through sedimentation, then water is pumped into the second mixing pipeline through the water absorbing well and the lifting pump, meanwhile, coagulant aid and coagulant aid are added again through the dosing pipeline, water enters the clarification tank, the flocs particles formed by secondary coagulation are removed through clarification Chi Chendian, then water enters the filtering tank, suspended matters in water are filtered out further, and treatment of mine water is achieved. In the mine water treatment process, the sludge obtained in the regulating sedimentation tank and the clarification tank is discharged into the sludge treatment tank, and the sludge can be reused as fuel after dehydration.
According to the mine water treatment system provided by the invention, through arranging the two mixing pipelines and adding medicines for two times, the dosage of medicines can be effectively reduced, the treatment cost is reduced, and the removal efficiency of suspended matters in mine water is improved.
Preferably, a hydraulic reaction tank is arranged between the first mixing pipeline and the regulating sedimentation tank, so that the mixing uniformity of the medicament in mine water is effectively improved, the reaction time is prolonged, the medicament effect is fully exerted, and the flocculation effect of the first medicament adding is improved.
Preferably, backwash wastewater of the filter tank enters the adjusting sedimentation tank, so that water waste is avoided.
Preferably, the sludge concentrated supernatant of the filter tank enters the regulating sedimentation tank, so that water waste is avoided.
Preferably, a mud scraping and discharging device is arranged in the regulating sedimentation tank, so that the settled mud can be scraped and conveyed to the mud treatment tank.
Preferably, the dosing pipeline is connected with a dosing system, and can automatically dose.
Preferably, a flow controller is arranged at the front end of the first mixing pipeline, and the mine water entering the first mixing pipeline is controlled by the cooperation of the dosing system.
Preferably, the coagulant is polyaluminum chloride, polyaluminum ferric sulfate or polyaluminum ferric chloride. The coagulant aid is polyacrylamide.
Preferably, the coagulant added for the first time is 80mg/L to 100mg/L, and the coagulant added for the second time is 70mg/L to 80mg/L. The coagulant aid added for the first time is 0.2 mg/L-0.3 mg/L, and the coagulant aid added for the second time is 0.2 mg/L-0.3 mg/L.
In a second aspect, a method for treating mine water with high suspended matter and high rock powder is provided, wherein the system in the first aspect is adopted, and a secondary coagulating sedimentation process is used: during the first coagulation, particles taking coal dust as a main body in water are destabilized and coagulated to form flocs, sediment is removed, during the second coagulation, newly added coagulant leads rock dust particles to be destabilized and coagulated to form flocs, and simultaneously, the residual micro flocs of the first coagulation sedimentation are further adsorbed, contacted and collided, contacted and flocculated with the residual fine particles in raw water, thereby enhancing the removal of suspended matters
From the above description of the invention, the invention has the following advantages:
1. aiming at different chemical characteristics of coal powder and rock powder, a secondary coagulating sedimentation process is adopted, the total dosage is reduced by more than 30% compared with conventional coagulating sedimentation, and the total mine water treatment cost is reduced;
2. the method has good effect of removing suspended matters, particularly rock powder, the turbidity of the effluent of the clarifier is stably less than 10NTU, the water quality is clear, and the problem of whitening of the effluent of the conventional treatment process of mine water with high suspended matters and high rock powder is solved;
3. the effect of removing suspended matters by the pre-sedimentation adjusting tank is improved, and the whole process system is stable to operate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention.
Wherein:
FIG. 1 is a simplified schematic diagram of a high-suspended-matter high-rock-fines mine water treatment system;
the identifiers in fig. 1 are respectively: the device comprises a first mixing pipeline 1, a hydraulic reaction tank 2, an adjusting sedimentation tank 3, a lifting pump 4, a second mixing pipeline 5, a clarification tank 6, a filtering tank 7, a coagulant dosing system 8, a coagulant aid dosing system 9, a sludge treatment tank 10 and a flow controller 11.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Embodiment one:
referring to fig. 1, a high-suspended-matter high-rock-powder mine water treatment system comprises a first mixing pipeline 1, an adjusting sedimentation tank 3, a second mixing pipeline 5, a clarification tank 6 and a filtering tank 7 which are sequentially arranged, wherein,
in an embodiment, a hydraulic reaction tank 2 is arranged between the first mixing pipeline 1 and the regulating sedimentation tank 3, so that the mixing uniformity of the medicament in mine water is effectively improved, the reaction time is prolonged, the medicament effect is fully exerted, and the flocculation effect of the first medicament addition is improved.
The front ends of the first mixing pipeline 1 and the second mixing pipeline 5 are respectively provided with a dosing pipeline for adding coagulant and coagulant aid, and preferably, the dosing pipelines are connected with a dosing system and can automatically dose. In other embodiments, the front end of the first mixing pipe 1 is provided with a flow controller 11, and the mine water entering the first mixing pipe 1 is controlled by a cooperative dosing system, and in this embodiment, the dosing system includes a coagulant dosing system 8 and a coagulant aid dosing system 9.
The coagulant is polyaluminum chloride, polyaluminum ferric sulfate or polyaluminum ferric chloride. The coagulant aid is polyacrylamide. The coagulant added for the first time is 80mg/L-100mg/L, and the coagulant added for the second time is 70mg/L-80mg/L. The coagulant aid added for the first time is 0.2 mg/L-0.3 mg/L, and the coagulant aid added for the second time is 0.2 mg/L-0.3 mg/L.
The regulating sedimentation tank 3 is provided with a suction well connected with a second mixing pipeline 5 and a lifting pump 4.
The regulating sedimentation tank 3 and the clarification tank 6 are both connected with the sludge treatment tank 10. Specifically, a sludge scraping and discharging device can be arranged in the regulating sedimentation tank 3 and the clarification tank 6, and the settled sludge can be scraped and conveyed to the sludge treatment tank 10.
In one embodiment, backwash drain and sludge concentrated supernatant from the filter tank 7 enters the conditioning settling tank 3 to avoid wasting water.
During use, mine water is discharged from underground and enters the first mixing pipeline 1, meanwhile, coagulant and coagulant aid are added into the first mixing pipeline 1 through the dosing pipeline, sewage is mixed with the coagulant aid and the coagulant aid to generate flocs, water then enters the regulating sedimentation tank 3, large suspended particles and formed flocs particles are removed through sedimentation, then water is pumped into the second mixing pipeline 5 through the water absorbing well and the lifting pump 4, meanwhile, coagulant aid and coagulant aid are added again through the dosing pipeline, water enters the clarification tank 6, the flocs particles formed by secondary coagulation are removed through sedimentation of the clarification tank 6, then water enters the filtering tank 7, and suspended matters in water removal are further filtered, so that treatment of mine water is realized. In the mine water treatment process, the sludge obtained in the regulating sedimentation tank 3 and the clarification tank 6 is discharged into the sludge treatment tank 10, and the sludge can be reused as fuel after dehydration.
According to the mine water treatment system provided by the invention, through arranging the two mixing pipelines and adding medicines for two times, the dosage of medicines can be effectively reduced, the treatment cost is reduced, and the removal efficiency of suspended matters in mine water is improved.
Embodiment two:
a method for treating mine water with high suspended matters and high rock powder, which adopts the system of the first aspect and adopts a secondary coagulating sedimentation process: during the first coagulation, particles taking coal dust as a main body in water are destabilized and coagulated to form flocs, sediment is removed, during the second coagulation, newly added coagulant enables rock dust particles to be destabilized and coagulated to form flocs, and simultaneously, the residual micro flocs of the first coagulation sedimentation are further adsorbed, contacted and collided, contacted with the residual fine particles in flocculated raw water, so that the removal of suspended matters is enhanced.
Embodiment III:
the embodiment provides a high suspended matter high rock powder mine water treatment process:
some high suspended matter is high rock powder mine water, the suspended matter content is 520-1120 mg/L, the average is about 800 mg/L, the rock powder content is higher, and the rock powder content accounts for about 30% of the total suspended matter content. And adopting a secondary coagulating sedimentation and filtering process. The best coagulant is PAC, the best coagulant aid is anionic PAM, the adding mode is that the PAC is added once for 80mg/L, the PAM is 0.3 mg/L, the PAC is added twice for 70mg/L, and the PAM is 0.3 mg/L.
Mine water is discharged from underground and enters a first mixing pipeline 1, coagulant and coagulant aid are added into the first mixing pipeline 1 through the dosing pipeline, the addition PAC is 80mg/L, PAM is 0.3 mg/L, water passes through the first mixing pipeline 1, enters a hydraulic reaction tank 2, water discharged from the hydraulic reaction tank 2 enters a regulating sedimentation tank 3, large suspended particles and formed flocculate particles are removed through precipitation, the suspended matter content of water discharged from the regulating sedimentation tank 3 is reduced to below 240 mg/L, a water absorbing well and a lifting pump 4 are arranged at the water outlet end of the regulating sedimentation tank 3, a dosing pipe is arranged on a water pressing pipe of the lifting pump 4, the coagulant aid and the coagulant aid are added for the second time, the dosing PAC is 70mg/L, PAM is 0.3 mg/L, a second mixing pipeline 5 is arranged after the dosing pipe, water discharged from the second pipeline coagulator enters a rock pond 6, flocculate particles formed through secondary coagulation are removed through precipitation in the settling pond 6, the water discharged from the settling pond 6 is reduced to mg/L to the water suspended matter content of 358/L, the water discharged from the settling pond 6 is clear, and the clear sludge is white, the clear powder is discharged from the settling pond 6.U is clear, and the clear sludge is found. The effluent of the clarification tank 6 enters a filter tank 7, suspended matters in the water are further filtered and removed, the content of the suspended matters in the filtered water is less than 3 mg/L, the turbidity is 2.1 NTU, and part of the filtered effluent is recycled after further advanced treatment. And (3) discharging mud from the regulating sedimentation tank 3 and the clarification tank 6 into a sludge treatment tank 10, and recycling the dewatered mud as fuel. The backwash water and the sludge concentration supernatant of the filter tank 7 are returned to the regulating tank for reprocessing.
The flow controller 11 is arranged in front of the first mixing pipeline 1, the operation of the dosing system is controlled, when mine water is discharged from the pit, the dosing system simultaneously starts dosing, and when the mine water stops discharging, the dosing system stops dosing.
The coagulant and the coagulant aid are added to the mine water before the clarifier 6, the total adding amount is the same as that of the mine water, namely, 150 mg/L PAC is added, 0.6mg/L PAM is added, the content of suspended matters in the effluent of the clarifier 6 is 54 mg/L, the water color is whitish, the turbidity after filtration is greater than 20NTU, and when the adding amount PAC is greater than 220 mg/L, PAM and greater than 1.0 mg/L, the suspended matters in the effluent of the clarifier 6 can be smaller than 10 mg/L. Therefore, the method shows that the dosage of the secondary coagulating sedimentation process can be reduced by more than 30% compared with the primary coagulating sedimentation process, the secondary coagulating sedimentation sludge turns white, and rock powder suspended matters are mainly removed.
Embodiment four:
the embodiment provides a high-suspended-matter high-rock-powder mine water treatment process, which comprises the following steps of:
the content of the suspended matters in the high-suspended-matter high-rock powder mine water is 550-700 mg/L, and the rock powder content is relatively high, and is about 15% of the total content of the suspended matters. And adopting a secondary coagulating sedimentation and filtering process. The best coagulant is PAC, the best coagulant aid is anionic PAM, the adding mode is that the PAC is added once for 100mg/L, the PAM is 0.2 mg/L, the PAC is added twice for 80mg/L, and the PAM is 0.3 mg/L.
The mine water is discharged from the underground first mixing pipeline 1, coagulant and coagulant aid are added into the first mixing pipeline 1 through the dosing pipeline, the adding amount PAC is 100mg/L, PAM is 0.2 mg/L, the mine water enters the hydraulic reaction tank 2 through the first mixing pipeline 1, the water discharged from the hydraulic reaction tank 2 enters the regulating sedimentation tank 3, large suspended particles and formed floc particles are removed through precipitation, the content of suspended matters in the water discharged from the regulating sedimentation tank 3 is reduced to be lower than 120 mg/L, a water absorbing well and a lifting pump 4 are arranged at the water outlet end of the regulating sedimentation tank 3, a dosing pipe is arranged on the water pressing pipe of the lifting pump 4, the coagulant aid and the coagulant aid are added for the second time, the adding amount PAC is 80mg/L, and the PAM is 0.3 mg/L; a second mixing pipeline 5 is arranged behind the dosing pipe, the effluent of the second pipeline coagulator enters a hydraulic circulation clarifier 6, the flocculation particles formed by the second coagulation are removed by precipitation in the clarifier 6, the effluent suspended solids content of the clarifier 6 is reduced to 7 mg/L, the turbidity is 5.6NTU, the clarifier 6 is clear and see the bottom, and the precipitated sludge is mainly rock powder and is grey white; the effluent of the clarification tank 6 enters a filter tank 7, suspended matters in the water are further filtered and removed, the content of the suspended matters in the filtered water is less than 3 mg/L, the turbidity is 2.3NTU, and the filtered effluent is recycled or further subjected to advanced treatment. Sludge discharged from the regulating sedimentation tank 3 and the clarification tank 6 enters the sludge treatment tank 10, and the sludge can be reused as fuel after dehydration. The backwash water and the sludge concentration supernatant of the filter tank 7 are returned to the regulating tank for reprocessing.
The flow controller 11 is arranged in front of the first mixing pipeline 1, the operation of the dosing system is controlled, when mine water is discharged from the pit, the dosing system simultaneously starts dosing, and when the mine water stops discharging, the dosing system stops dosing.
The mine water adopts the method that coagulant and coagulant aid are added before the clarifier 6, the total dosage is the same as that described above, namely, PAC is added 180 mg/L, PAM is added 0.5 mg/L, the content of suspended matters in the effluent of the clarifier 6 is 48 mg/L, the water color is whitish, the turbidity after filtration is greater than 20NTU, and when the dosage PAC reaches 280 mg/L, PAM to be greater than 1.0 mg/L, the suspended matters in the effluent of the clarifier 6 can be smaller than 10 mg/L. Therefore, the secondary coagulating sedimentation process is shown to reduce the dosage by more than 30% compared with the primary coagulating sedimentation process, the secondary coagulating sedimentation sludge is grey in color, and rock powder suspended matters are mainly removed.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.
Claims (10)
1. The high-suspended-matter high-rock-powder mine water treatment system is characterized by comprising a first mixing pipeline, an adjusting sedimentation tank, a second mixing pipeline, a clarifying tank and a filtering tank which are sequentially arranged, wherein the front ends of the first mixing pipeline and the second mixing pipeline are respectively provided with a dosing pipeline for dosing coagulant and coagulant aid; the adjusting sedimentation tank is provided with a water absorbing well and a lifting pump which are connected with a second mixing pipeline; and the regulating sedimentation tank and the clarification tank are both connected with the sludge treatment tank.
2. The high-suspended-matter high-rock-powder mine water treatment system of claim 1, wherein a hydraulic reaction tank is arranged between the first mixing pipeline and the regulating sedimentation tank.
3. The high suspended matter high rock dust mine water treatment system of claim 1, wherein backwash drain of said filter basin enters said conditioning settling basin.
4. The high-suspension high-rock-powder mine water treatment system of claim 1, wherein the sludge concentrated supernatant of the filter tank enters the conditioning and settling tank.
5. The high-suspended-matter high-rock-powder mine water treatment system of claim 1, wherein a mud scraping and discharging device is arranged in the regulating sedimentation tank.
6. The high suspended matter high rock dust mine water treatment system of claim 1, wherein said dosing line is connected to a dosing system.
7. The high suspended solids high rock dust mine water treatment system of claim 1, wherein a flow controller is provided at a front end of the first mixing conduit.
8. The high-suspension high-rock-powder mine water treatment system of claim 1, wherein the coagulant is polyaluminum chloride, polyferric sulfate or polyaluminum ferric chloride; the coagulant aid is polyacrylamide.
9. The high-suspended matter high-rock powder mine water treatment system of claim 1 or 8, wherein the coagulant added for the first time is 80mg/L-100mg/L, and the coagulant added for the second time is 70mg/L-80mg/L; the coagulant aid added for the first time is 0.2 mg/L-0.3 mg/L, and the coagulant aid added for the second time is 0.2 mg/L-0.3 mg/L.
10. A method for treating high suspended matter and high rock dust mine water, which is characterized in that a system as claimed in any one of claims 1 to 9 is adopted, and a secondary coagulating sedimentation process is used: during the first coagulation, particles taking coal dust as a main body in water are destabilized and coagulated to form flocs, sediment is removed, during the second coagulation, newly added coagulant enables rock dust particles to be destabilized and coagulated to form flocs, and simultaneously, the residual micro flocs of the first coagulation sedimentation are further adsorbed, contacted and collided, contacted with the residual fine particles in flocculated raw water, so that the removal of suspended matters is enhanced.
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