CN214571354U - System for handle and contain sulfate and fluoride ion mine water - Google Patents
System for handle and contain sulfate and fluoride ion mine water Download PDFInfo
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- CN214571354U CN214571354U CN202022585044.9U CN202022585044U CN214571354U CN 214571354 U CN214571354 U CN 214571354U CN 202022585044 U CN202022585044 U CN 202022585044U CN 214571354 U CN214571354 U CN 214571354U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 title abstract description 18
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title abstract description 11
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims abstract description 32
- 239000010865 sewage Substances 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims abstract description 27
- 239000002131 composite material Substances 0.000 claims abstract description 25
- 239000000945 filler Substances 0.000 claims abstract description 22
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- 239000007788 liquid Substances 0.000 claims abstract description 9
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- 238000010438 heat treatment Methods 0.000 claims description 3
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- 229910052731 fluorine Inorganic materials 0.000 abstract 2
- 239000011737 fluorine Substances 0.000 abstract 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
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- 239000006004 Quartz sand Substances 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 6
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- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model provides a system for handle and contain sulfate and fluoride ion mine water, including equalizing basin, UASB reactor, MBR reactor, compound ecological filter bed unit, the equalizing basin is used for improving mine water COD and SO4 2‑In the ratio, the UASB reactor is used for removing sulfate, the MBR reactor is used for solid-liquid separation, and the composite ecological filter bed unit is used for removing fluoride ions. The utility model relates to a solve that mine water sulfate concentration and fluoride ion concentration exceed standardThe problem is that a system for removing sulfate ions and fluoride ions in mine water with high efficiency and low cost is provided, a system which is connected with an UASB (upflow anaerobic sludge blanket) and then enters a rear-end multi-level filler filtering area is adopted to carry out the cooperative treatment of mine water and domestic sewage, the process steps and the area of a reaction tank are reduced, microorganism sludge generated by the MBR is mainly enriched in fillers of an MBR reaction tank, the sludge discharge amount is reduced, and finally the effluent reaches COD (chemical oxygen demand), TDS (total dissolved solids), F (fluorine) and F (fluorine) in surface III-type water‑And SO4 2‑The standard of (2).
Description
Technical Field
The utility model relates to a water treatment technical field, concretely relates to system for handle and contain sulfate and fluoride ion mine water.
Background
China is the largest coal producing and consuming country in the world. Under the condition of vigorously developing energy structure adjustment and optimization, the coal consumption ratio in the primary energy consumption structure in China in 2019 still reaches 57.7%, and the production of raw coal reaches 38.5 hundred million tons. And the coal resources of China are concentrated in water-deficient areas in northwest such as inner Mongolia, Shaanxi, Shanxi, Ningxia and Gansu, and coal mining causes local natural water sources to be cut off or underground water resources to flow into a goaf to form mine water, so that the influence on the water resources is serious. According to statistics, the lost mine water of national coal mining every year is equivalent to 60% of the water consumption of industrial and civil every year, and the contradiction between the water discharge and the water shortage is prominent, so that the recycling of the mine water in the coal mining area is very important. At present, mine water in coal mining areas is mainly treated by physical and chemical methods such as coagulation, precipitation, filtration, adsorption, ion exchange and the like, the treated mine water is mainly used for mining area production water (hydraulic mining, spray coal washing, coal processing and the like), domestic water, mining area greening and the like, and surplus and unused part of mine water is mainly discharged into an earth surface water system. However, most mine water is high-salinity mine water, the TDS of total soluble solids is high, and the mine water cannot be utilized after being simply treated; the conventional coagulation clarification filtration process can not meet the drainage requirement which is gradually improved, and simultaneously, the problems of earth surface water and soil loss, soil salinization, vegetation withering and death and the like can be caused by random discharge due to lack of a receiving water body. Therefore, how to further deeply treat and purify the salt-containing mine water to meet the discharge requirement becomes the problem that whether the mine water can be reasonably and effectively treated and recycled in the coal mining area and the discharged mine water cannot be recycled finally.
The mine water treated by the conventional coagulating sedimentation process in a specific mining area has the characteristic that the concentration of sulfate and the concentration of fluoride ions exceed the standard, and redundant sulfate and fluoride ions in the mine water need to be removed before the mine water is recycled or discharged after reaching the standard. In the aspect of sulfate treatment process selection, Sulfate Reducing Bacteria (SRB) are utilized, and sulfate is used as a final electron acceptor to decompose organic matters under the strict anaerobic condition, so that the method for removing sulfate in mine water is high in efficiency and low in cost. The treatment method requires that the COD content in the sewage is higher than the sulfate content, so that the domestic sewage in the mining area can be introduced for synchronous treatment, the pollutants in the domestic sewage are removed through the subsequent advanced treatment, and the treatment cost of the mining area mine water and the domestic sewage is reduced on the whole. In the aspect of fluoride ion treatment process selection, the currently industrially applied treatment methods of fluoride-containing wastewater mainly comprise a precipitation method, an electrochemical method, an adsorption method, an ion exchange resin method, a microorganism defluorination method and the like, wherein the adsorption method has the advantages of simple process, simplicity and convenience in operation and stable adsorption capacity, can reduce the fluoride ion concentration in the wastewater from 10-20 mg/L to 1mg/L, and is suitable for treating wastewater with low fluoride content.
Disclosure of Invention
The utility model relates to a solve the problem that mine water sulfate concentration and fluoride ion concentration exceed standard, a high efficiency is provided, get rid of the processing system of mine aquatic sulfate ion and fluoride ion with low costs, adopt UASB back connection MBR then get into the system of rear end multilevel filler filtering area and carry out the coprocessing of mine water and domestic sewage, reduce technology step and reaction tank area, the microorganism mud that MBR produced mainly concentrates in MBR reaction tank packs, reduce mud sludge discharge, final water outlet reaches the COD in earth's surface III class aquatic, TDS, or some ion (if F reaction tank packs), the COD that the final water outlet reaches earth's surface III class aquatic, TDS, or some ion (if-And SO4 2-) The standard of (2).
The utility model provides a system for treating mine water containing sulfate and fluoride ions, which comprises a regulating tank, a UASB reactor, an MBR reactor and a composite ecological filter bed unit which are connected in sequence;
the adjusting tank is used for improving COD and SO of mine water4 2-In the ratio, the UASB reactor is used for removing sulfate, the MBR reactor is used for solid-liquid separation, and the composite ecological filter bed unit is used for removing fluoride ions;
the UASB reactor comprises a water distributor, a triphase separator, a gas collection chamber and a water collection weir;
the MBR reactor comprises an integrated anoxic tank, an MBR reactor body and an aeration tank, and sludge in the MBR reactor body flows back to the anoxic tank for denitrification;
the composite ecological filter bed unit comprises a multi-medium filter layer and a multi-level filler filtering area.
A system for handle and contain sulfate and fluoride ion mine water, as preferred mode, the equalizing basin links to each other with mining area domestic sewage drain pipe, sets up dive mixer in the equalizing basin.
A system for handle and contain sulfate and fluoride ion mine water, as preferred mode, UASB reactor sets up peripheral heating device and control system.
The utility model relates to a system for handle and contain sulfate and fluoride ion mine water, as preferred mode, the aeration tank uses submergence formula dull and stereotyped membrane.
A system for handle and contain sulfate and fluoride ion mine water, as preferred mode, dull and stereotyped membrane material is PVDF.
A system for handle and contain sulfate and fluoride ion mine water, as preferred mode, the multimedium filter layer comprises anthracite, quartz sand, active carbon, active alumina.
A system for handle and contain sulfate and fluoride ion mine water, as preferred mode, the filtration district is packed to the multilevel includes from supreme coal gangue layer, gravel layer, cinder layer, river sand bed and fly ash layer down.
And (3) allowing the mine water subjected to conventional coagulation clarification treatment to enter an adjusting tank, introducing domestic sewage into the adjusting tank, and homogenizing the sewage by using a stirring device. Regulated COD/SO of the sewage4 2-The ratio is about 1.5-2.0, and the pH is 7.0-7.5.
The effluent of the regulating pool 1 enters the UASB reactor 2 through a centrifugal pump, and a water distributor, a three-phase separator, a gas collection chamber and a water collection weir are arranged in the UASB reactor. The wastewater sequentially flows through a sludge bed from the bottom of the reactor at an ascending flow velocity of 0.5-1.0 m/h, and then is suspended to a three-phase separator and a settling zone; the inclined wall angle of the precipitator of the three-phase separator is between 45 and 60O, so that the sludge does not accumulate and falls into the reaction zone as soon as possible. The retention time of the sewage in the UASB reactor 2 is 4-12h, the temperature of the UASB reactor is 30-35 ℃, and the pH of the UASB reactor is 6.5-8.0;
the effluent overflow of the UASB reactor 2 enters an MBR (membrane bioreactor) 3, the MBR is an integrated MBR reaction tank, the front end of the MBR reaction tank is provided with an anoxic tank, the rear end of the MBR reaction tank is an aeration tank, and an immersed flat plate membrane made of PVDF (polyvinylidene fluoride) material is arranged in the aeration tank to ensure the quality of the effluent. And part of the mixed liquid in the MBR aeration tank flows back to the anoxic tank to realize denitrification, and the residual sludge is discharged periodically.
The effluent of the MBR 3 enters a composite ecological filter bed 4. The composite ecological filter bed comprises a multi-medium filtering part and a multi-layer filler filtering part, wherein the multi-medium filtering part is composed of anthracite, quartz sand, activated carbon and activated alumina, and the multi-layer filler filtering part is constructed by selecting coal gangue, gravel, coal slag, river sand and fly ash from bottom to top. The residence time of the sewage in the multi-medium filtering part is 0.5 hour, and the residence time in the multi-layer filler filtering part is 6 hours.
After the treatment of the whole system, the removal rate of sulfate reaches 85-95%, the concentration of COD (CODCr) is reduced to be below 20mg/L, and the concentration of F-is reduced to be below 1 mg/L.
The utility model has the advantages of it is following:
(1) the domestic sewage in the mining area is synchronously treated, and the construction cost and the operating cost of the domestic sewage treatment facility in the mining area are saved.
(2) The microbial method is adopted as the desulfurization process, breaks the limitation of the conventional treatment process, and has the advantages of high treatment efficiency, strong applicability, no secondary pollution, low treatment cost and the like.
(3) Adopts MBR technology to carry out advanced sewage treatment, and has the advantages of small occupied area, excellent effluent quality, high volume load and the like compared with the traditional activated sludge process.
(4) Sulfate ions in the mine water are removed before the fluoride ions are removed, so that the service efficiency and the service life of the adsorbent in the composite ecological filter bed are improved.
Drawings
FIG. 1 is a system diagram of the treatment of mine water containing sulfate and fluoride ions.
Reference numerals:
1. a regulating tank; 2. a UASB reactor; 3. an MBR reactor; 31. an anoxic tank; 32. an MBR reactor body; 33. an aeration tank; 4. a composite ecological filter bed; 41. a multimedia filter layer; 42. and a multi-level filler filtering area.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Example 1
As shown in fig. 1, a system for treating mine water containing sulfate and fluoride ions comprises a regulating tank 1, a UASB reactor 2, an MBR reactor 3 and a composite ecological filter bed unit 4 which are connected in sequence;
the adjusting tank 1 is used for improving COD and SO of mine water4 2-In the ratio, the UASB reactor 2 is used for removing sulfate, the MBR reactor 3 is used for solid-liquid separation, and the composite ecological filter bed unit 4 is used for removing fluoride ions;
the UASB reactor 2 comprises a water distributor, a triphase separator, a gas collection chamber and a water collection weir;
the MBR 3 comprises an integrated anoxic tank 31, an MBR body 32 and an aeration tank 33, and sludge in the MBR body 32 flows back to the anoxic tank 31 for denitrification;
the composite ecological filter bed unit 4 includes a multi-media filter layer 41 and a multi-level filler filtration zone 42.
Example 2
As shown in fig. 1, a system for treating mine water containing sulfate and fluoride ions comprises a regulating tank 1, a UASB reactor 2, an MBR reactor 3 and a composite ecological filter bed unit 4 which are connected in sequence;
the adjusting tank 1 is used for improving COD and SO of mine water4 2-In the ratio, the UASB reactor 2 is used for removing sulfate, the MBR reactor 3 is used for solid-liquid separation, and the composite ecological filter bed unit 4 is used for removing fluoride ions; the adjusting tank 1 is connected with a domestic sewage drain pipe in a mining area, and a submersible stirrer is arranged in the adjusting tank 1;
the UASB reactor 2 comprises a water distributor, a triphase separator, a gas collection chamber and a water collection weir; the UASB reactor 2 is provided with a peripheral heating device and a control system;
the MBR 3 comprises an integrated anoxic tank 31, an MBR body 32 and an aeration tank 33, and sludge in the MBR body 32 flows back to the anoxic tank 31 for denitrification; the aeration tank 33 adopts an immersed flat membrane, and the flat membrane is made of PVDF;
the composite ecological filter bed unit 4 comprises a multi-medium filter layer 41 and a multi-layer filler filtering area 42, wherein the multi-medium filter layer 41 is composed of anthracite, quartz sand, activated carbon and activated alumina, and the multi-layer filler filtering area 42 comprises a coal gangue layer, a gravel layer, a coal cinder layer, a river sand layer and a pulverized coal ash layer from bottom to top.
The method of use of examples 1-2 was: mine water subjected to conventional coagulation clarification treatment enters the regulating tank 1, domestic sewage is introduced into the regulating tank 1, and sewage homogenization is completed by using a stirring device. Regulated COD/SO of the sewage4 2-The ratio is about 1.5-2.0, and the pH is 7.0-7.5.
The effluent of the regulating pool 1 enters the UASB reactor 2 through a centrifugal pump, and a water distributor, a three-phase separator, a gas collection chamber and a water collection weir are arranged in the UASB reactor. The wastewater sequentially flows through a sludge bed from the bottom of the reactor at an ascending flow velocity of 0.5-1.0 m/h, and then is suspended to a three-phase separator and a settling zone; the inclined wall angle of the precipitator of the three-phase separator is between 45 and 60O, so that the sludge does not accumulate and falls into the reaction zone as soon as possible. The retention time of the sewage in the UASB reactor 2 is 4-12h, the temperature of the UASB reactor is 30-35 ℃, and the pH of the UASB reactor is 6.5-8.0;
the effluent overflow of the UASB reactor 2 enters an MBR (membrane bioreactor) 3, the MBR is an integrated MBR reaction tank, the front end is provided with an anoxic tank 31, the rear end is an aeration tank 33, and an immersed flat plate membrane made of PVDF (polyvinylidene fluoride) is arranged in the aeration tank 33 to ensure the quality of the effluent. And part of the mixed liquid in the MBR aeration tank 33 flows back to the anoxic tank 31 to realize denitrification, and the residual sludge is discharged periodically.
The effluent of the MBR 3 enters a composite ecological filter bed 4. The composite ecological filter bed comprises a multi-medium filter layer 41 and a multi-layer filler filtering part area 42, wherein the multi-medium filter layer 41 is composed of anthracite, quartz sand, activated carbon and activated alumina, and the multi-layer filler filtering part area 42 is constructed by selecting coal gangue, gravel, coal slag, river sand and fly ash from bottom to top. The residence time of the wastewater in the multimedia filter layer 41 is 0.5 hour, and the residence time in the multi-stage filler filtration zone 42 is 6 hours.
After the treatment of the whole system, the removal rate of sulfate reaches 85-95%, the concentration of COD (CODCr) is reduced to be below 20mg/L, and the concentration of F-is reduced to be below 1 mg/L.
Example 3
As shown in fig. 1, a sulfate and fluoride ion mine water treatment system comprises, in a sewage flowing direction: regulating reservoir 1, UASB reactor 2, MBR reactor 3, composite ecological filter bed 4. Mine water subjected to conventional coagulation clarification treatment enters the regulating tank 1, domestic sewage is introduced into the regulating tank 1, and sewage homogenization is completed by using a stirring device. Regulated COD/SO of the sewage4 2-Ratio is increased to about 1.7, SO4 2-The concentration is about 570mg/L, the COD concentration is about 971mg/L, and the pH is 7.0-7.5.
The effluent of the regulating pool 1 enters the UASB reactor 2 through a centrifugal pump, and a water distributor, a three-phase separator, a gas collection chamber and a water collection weir are arranged in the UASB reactor. The wastewater sequentially flows through a sludge bed from the bottom of the reactor at an ascending flow velocity of 0.5-1.0 m/h, and then is suspended to a three-phase separator and a settling zone; the inclined wall angle of the precipitator of the three-phase separator is between 45 and 60O, so that the sludge does not accumulate and falls into the reaction zone as soon as possible. The residence time of the effluent in the UASB reactor 2 was 6 h.
The effluent overflow of the UASB reactor 2 enters an MBR (membrane bioreactor) 3, the MBR is an integrated MBR reaction tank, the front end is provided with an anoxic tank 31, the rear end is an aeration tank 33, and an immersed flat plate membrane made of PVDF (polyvinylidene fluoride) is arranged in the aeration tank 33 to ensure the quality of the effluent. And part of the mixed liquid in the MBR aeration tank 33 flows back to the anoxic tank 31 to realize denitrification, and the residual sludge is discharged periodically.
The effluent of the MBR 3 enters a composite ecological filter bed 4. The composite ecological filter bed comprises a multi-medium filter layer 41 and a multi-layer filler filtering part area 42, wherein the multi-medium filter layer 41 is composed of anthracite, quartz sand, activated carbon and activated alumina, and the multi-layer filler filtering part area 42 is constructed by selecting coal gangue, gravel, coal slag, river sand and fly ash from bottom to top. The residence time of the wastewater in the multimedia filter layer 41 is 0.5 hour, and the residence time in the multi-stage filler filtration zone 42 is 6 hours.
After the treatment of the whole system, the removal rate of sulfate reaches 85-95%, the concentration of COD (CODCr) is reduced to be below 20mg/L, and the concentration of F-is reduced to be below 1 mg/L.
Example 4
As shown in fig. 1, a system for treating mine water containing sulfate and fluoride ions comprises, in a sewage flowing direction: a regulating tank 1, a UASB reactor 2, an MBR reactor 3 and a composite ecological filter bed 4. Normal coagulation clarification areaThe treated mine water enters the regulating tank 1, meanwhile, domestic sewage is introduced into the regulating tank 1, and sewage homogenization is completed by utilizing a stirring device. Regulated COD/SO of the sewage4 2-Ratio is increased to about 1.5, SO4 2-The concentration is about 360mg/L, the COD concentration is about 540mg/L, and the pH is 6.5-7.0.
The effluent of the regulating pool 1 enters the UASB reactor 2 through a centrifugal pump, and a water distributor, a three-phase separator, a gas collection chamber and a water collection weir are arranged in the UASB reactor. The wastewater sequentially flows through a sludge bed from the bottom of the reactor at an ascending flow velocity of 0.5-1.0 m/h, and then is suspended to a three-phase separator and a settling zone; the inclined wall angle of the precipitator of the three-phase separator is between 45 and 60O, so that the sludge does not accumulate and falls into the reaction zone as soon as possible. The residence time of the effluent in the UASB reactor 2 was 6 h.
The effluent overflow of the UASB reactor 2 enters an MBR (membrane bioreactor) 3, the MBR 3 is integrated as one, the front end of the MBR is provided with an anoxic tank, the rear end of the MBR is provided with an aeration tank, and an immersed flat membrane made of PVDF (polyvinylidene fluoride) material is arranged in the aeration tank to ensure the quality of the effluent. And part of the mixed liquid in the MBR aeration tank flows back to the anoxic tank to realize denitrification, and the residual sludge is discharged periodically.
The effluent of the MBR 3 enters a composite ecological filter bed 4. The composite ecological filter bed comprises a multi-medium filter layer 41 and a multi-layer filler filtering part area 42, wherein the multi-medium filter layer 41 is composed of anthracite, quartz sand, activated carbon and activated alumina, and the multi-layer filler filtering part area 42 is constructed by selecting coal gangue, gravel, coal slag, river sand and fly ash from bottom to top. The residence time of the wastewater in the multimedia filter layer 41 is 0.5 hour, and the residence time in the multi-stage filler filtration zone 42 is 6 hours.
After the treatment of the whole system, the removal rate of sulfate reaches 80-90 percent, the concentration of COD (CODCr) is reduced to be below 20mg/L, and the concentration of F-is reduced to be below 1 mg/L.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A system for treating mine water containing sulfate and fluoride ions is characterized in that: comprises a regulating tank (1), a UASB reactor (2), an MBR reactor (3) and a composite ecological filter bed unit (4) which are connected in sequence;
the adjusting tank (1) is used for improving COD and SO of mine water4 2-The UASB reactor (2) is used for removing sulfate, the MBR reactor (3) is used for solid-liquid separation, and the composite ecological filter bed unit (4) is used for removing fluoride ions;
the UASB reactor (2) comprises a water distributor, a three-phase separator, a gas collection chamber and a water collection weir;
the MBR (3) comprises an integrated anoxic tank (31), an MBR body (32) and an aeration tank (33), and sludge in the MBR body (32) flows back to the anoxic tank (31) for denitrification;
the composite ecological filter bed unit (4) comprises a multi-medium filter layer (41) and a multi-level filler filtering area (42).
2. The system for treating mine water containing sulfate and fluoride ions according to claim 1, wherein: the adjusting tank (1) is connected with a domestic sewage drain pipe in a mining area, and the submersible stirrer is arranged in the adjusting tank (1).
3. The system for treating mine water containing sulfate and fluoride ions according to claim 1, wherein: the UASB reactor (2) is provided with a peripheral heating device and a control system.
4. The system for treating mine water containing sulfate and fluoride ions according to claim 1, wherein: the aeration tank (33) uses an immersed flat membrane.
5. The system for treating mine water containing sulfate and fluoride ions according to claim 4, wherein: the flat membrane is made of PVDF.
6. The system for treating mine water containing sulfate and fluoride ions according to claim 1, wherein: the multi-level filler filtering area (42) comprises a coal gangue layer, a gravel layer, a coal cinder layer, a river sand layer and a pulverized coal ash layer from bottom to top.
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2020
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Address after: 100039 6th floor, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Water Environmental Protection Co.,Ltd. Country or region after: China Address before: 100039 501, 502, 5th floor, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee before: Guoneng Lang Xinming Environmental Protection Technology Co.,Ltd. Country or region before: China |