CN211497230U - Mine acidic iron-containing wastewater treatment system - Google Patents
Mine acidic iron-containing wastewater treatment system Download PDFInfo
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- CN211497230U CN211497230U CN202020043888.8U CN202020043888U CN211497230U CN 211497230 U CN211497230 U CN 211497230U CN 202020043888 U CN202020043888 U CN 202020043888U CN 211497230 U CN211497230 U CN 211497230U
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Abstract
The utility model relates to a mine acid iron-containing wastewater treatment system, including well head collecting pit, catch basin, regulation filtering pond, multistage drop channel, contact filtering pond, first advection sedimentation tank, second advection sedimentation tank and sand filtering pond. The adjusting filter tank and the contact filter tank are provided with intervals, and an S-shaped circuitous water flow direction is formed, so that the wastewater is fully contacted with the fly ash and the manganese sand filter material, and the effects of neutralization reaction and catalytic oxidation reaction are improved. The utility model discloses an electric power, external use consumptive material quantity are few, and daily operation need not personnel on duty, only need regularly clear up the mud in the sedimentation tank, and the specially adapted traffic is inconvenient, unmanned on duty's field environment, and whole investment and later stage operation maintenance cost can reduce by a wide margin than present sewage treatment facility, all have fine spreading value to the discharge to reach standard and the environmental protection that realize colliery waste water.
Description
Technical Field
The utility model relates to a mine acid waste water treatment technical field, especially a mine acid iron-containing wastewater treatment system.
Background
The acid wastewater generated by the mine has a low pH value and contains iron, lead, arsenic, cadmium, copper and the like, and the acid wastewater seriously harms underground water resources and the ecological environment. Particularly, in abandoned mines in mountain areas, water burst points are scattered, traffic and electricity are inconvenient, sewage treatment facilities are high in construction cost and high in operation and maintenance difficulty, and the ecological environment problem to be solved urgently is formed.
At present, a special sewage treatment plant is generally constructed, and a pure chemical reaction process is adopted to treat the acidic iron-containing wastewater: generally, an alkaline agent is added to neutralize acid in the wastewater and simultaneously react with iron ions to form ferric hydroxide, a flocculating agent is continuously added to further precipitate the ferric hydroxide, and the wastewater is treated in a sludge-water separation mode through a sedimentation tank. However, most mines are located in remote mountainous areas, the transportation and the electricity utilization are inconvenient, the construction investment of a sewage treatment plant is large, and meanwhile, the cost of daily operation of the sewage treatment plant in the aspects of high-power electricity utilization, medicament treatment, transportation, personnel and the like is also high. Therefore, development of a mine wastewater treatment process and a system thereof which are suitable for mine field environments, low in daily operation cost and less in manual maintenance is urgently needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problem in the background art, the utility model provides a mine acid iron-containing wastewater treatment system. The system adopts limestone macadam to pre-adjust the pH value, then adjusts the pH value to more than 6 through the fly ash filter material, increases the oxygen content in the wastewater through the aeration of a multi-stage drop channel, and then carries out catalytic oxidation reaction through the contact of the manganese sand filter material to remove iron in the water.
The utility model provides a technical scheme that its technical problem adopted is:
a mine acidic iron-containing wastewater treatment system comprises a wellhead collecting tank, a regulating filter tank, a multi-stage water dropping channel, a contact filter tank, a first horizontal sedimentation tank, a second horizontal sedimentation tank and a sand filter tank;
the water outlet of the wellhead collecting tank is connected with the water inlet of the water collecting tank through a pipeline, the water outlet of the water collecting tank is connected with the water inlet of the adjusting filter tank through a pipeline, limestone macadam is paved in the water collecting tank, and a fly ash filter material is paved in the adjusting filter tank;
the adjusting filter is connected with a contact filter through a multistage drop channel, and a manganese sand filter material is paved in the contact filter;
the water outlet of the contact filter is communicated with the water inlet of the sand filter through a pipeline; quartz sand is paved in the sand filter tank;
the adjusting filter tank is connected with a water inlet of a first horizontal sedimentation tank through a pipeline, and a water outlet of the first horizontal sedimentation tank is connected with a water collecting tank through a pipeline provided with a water pump;
the contact filter tank is connected with a water inlet of a second horizontal flow sedimentation tank through a pipeline, and a water outlet of the second horizontal flow sedimentation tank is connected with a water collecting tank through a pipeline provided with a water pump.
Preferably, a plurality of intervals are arranged in the adjusting filter, water inlets and water outlets with bottom water inlets and upper water outlets staggered left and right are arranged between the intervals to form an S-shaped circuitous water flow direction, and the contact area and the contact time with the fly ash filter material are further increased to realize full reaction; the bottom of the adjusting filter tank is provided with a water inlet pipe and an air inlet pipe for back flushing; the sediment can be dredged and the filtering capability of the filtering material can be recovered through the gas-water back flushing.
Preferably, a plurality of intervals are arranged in the contact filter, water inlets and water outlets with bottom water inlets and upper water outlets staggered left and right are arranged between the intervals to form an S-shaped roundabout water flow direction, and the contact area and the contact time with the manganese sand filter material are further increased to realize full reaction; and a water inlet pipe and an air inlet pipe for back flushing are arranged at the bottom of the contact filter. The sediment can be dredged and the filtering capability of the filtering material can be recovered through the gas-water back flushing.
Preferably, the particle size range of the limestone macadam paved in the water collecting tank is 10-30 mm. Not only increases the specific surface area, but also is not easy to block.
Preferably, the particle size range of the fly ash filter material paved in the adjusting filter is 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
Preferably, the manganese sand filter material paved in the contact filter tank has a particle size range of 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
Preferably, the particle size range of the quartz sand paved in the sand filter tank is 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
Preferably, the wellhead collecting pool can be a plurality of wellheads. Can be used for centralized wastewater treatment of relatively centralized multi-mine.
The specific implementation treatment process of the mine acidic iron-containing wastewater treatment system is as follows:
step A, mine wastewater collection: collecting the dispersed wastewater gushed from the mine into a wellhead collecting pool;
step B, pH value preconditioning: introducing the wastewater into a water collecting tank paved with limestone crushed stones, and carrying out primary reaction on the limestone and the acidic wastewater;
step C, pH value adjustment: b, introducing the wastewater treated in the step B into an adjusting filter paved with a fly ash filter material, and adjusting the pH value to be more than 6; the wastewater and the fly ash fully react to further increase the pH value. Meanwhile, the reaction principle is as follows:
CaCO3+2H+═Ca2++CO2↑+H2O
CaO+H2O═Ca(OH)2
Ca(OH)2+2H+═Ca2++ 2H2O；
step D, drop aeration: regulating the effluent of the filter tank to enter a multistage drop channel, and performing drop aeration on the wastewater by utilizing drop height to ensure that the wastewater is fully contacted with air so as to improve the content of dissolved oxygen in the wastewater;
step E, catalytic oxidation: d, introducing the wastewater treated in the step D into a contact filter tank paved with a manganese sand filter material, enabling the wastewater to be fully contacted with the manganese sand filter material to generate catalytic oxidation reaction, and dissolving Fe2+Oxidizing into non-dissolved ferric iron;
step F, filtering and discharging: guiding the supernatant in the contact filter tank to a sand filter tank paved with quartz sand for filtering, further reducing the concentration of suspended matters and simultaneously reducing the chroma, and finishing the wastewater treatment;
g, backwashing of filter materials: after the system is used for a period of time, the fly ash filter material and the manganese sand filter material are subjected to gas-water back washing to dredge sediments, prevent blockage and recover the filtering capacity;
pumping clear water and air into the bottom of the regulating filter tank paved with the fly ash filter material and the bottom of the contact filter tank paved with the manganese sand filter material through a water inlet pipe and an air inlet pipe which are arranged at the bottoms of the regulating filter tank and the contact filter tank and used for back flushing, performing gas-water back flushing on the fly ash filter material and the manganese sand filter material, and dredging the fly ash filter material and the manganese sand filter material; introducing wastewater after the back flushing of the regulating filter into a first horizontal sedimentation tank, and introducing wastewater after the back flushing of the contact filter into a second horizontal sedimentation tank; supernatant liquid after the first horizontal flow sedimentation tank and the second horizontal flow sedimentation tank are sedimentated is pumped by a pipeline and returned to the wellhead water collecting tank for retreatment.
The utility model discloses an adopt low price's lime stone rubble to carry out pH value and adjust in advance, recycle the fly ash filter material and adjust pH value to more than 6. A plurality of intervals are arranged in the adjusting filter tank, and an S-shaped circuitous water flow design is adopted, so that the wastewater and the fly ash are fully reacted, and the pH value is further improved. The reaction principle is as follows:
CaCO3+2H+═Ca2++CO2↑+H2O
CaO+H2O═Ca(OH)2
Ca(OH)2+2H+═Ca2++ 2H2O
a multi-stage water dropping channel is adopted, drop aeration is carried out by utilizing the fall, so that water is fully contacted with air, the content of dissolved oxygen in water is improved, and preparation is made for subsequent catalytic oxidation reaction.
The manganese sand filter material is prepared from natural manganese ores as raw materials by the processes of crushing, washing, polishing, impurity removal, drying, magnetic separation, screening, dust removal and the like. Preparing the processed manganese sand into a grading proportion with a water treatment filter material according to a certain grading, wherein the particle size range of the manganese sand filter material is 3-5 mm; so that the sewage treatment device has the maximum specific surface area and the sewage interception capability in unit volume. The iron removal mechanism of the manganese sand filter material is a contact oxidation method, and the iron removal of the manganese sand is realized by utilizing the catalytic oxidation effect of manganese dioxide in natural manganese sand to remove dissolved Fe2+Oxidized to ferric iron in a non-dissolved state and then removed by filtration through quartz sand. The iron removal is not performed on the manganese sand, but is performed by a brown yellow active filter membrane deposited on the surface of the manganese sand, and the active filter membrane for removing the iron in the manganese sand filter material is usually soaked in the wastewater for 30-40 days, so that the optimal iron removal effect can be achieved.
The oxygenated wastewater naturally flows into a contact filter tank, a plurality of intervals are arranged in the contact filter tank, and the inlet and the outlet adopt the design of S-shaped circuitous water flow, so that the wastewater is fully contacted with the manganese sand filter material to generate catalytic oxidation reaction, and the dissolved Fe2+Oxidized to ferric iron in a non-dissolved state. And guiding the supernatant in the contact filter tank to a sand filter tank, and filtering the supernatant through quartz sand to further reduce the concentration of suspended matters and simultaneously reduce the chroma, thereby finishing the treatment process of the wastewater.
The utility model has the advantages that: the utility model adopts the cheap limestone macadam to pre-adjust the pH value of the acid wastewater, and then utilizes the fly ash filter material to adjust the pH value to be more than 6; and then the iron is removed through a manganese sand filter material of the contact filter.
A multi-stage drop channel is adopted, drop aeration is carried out by utilizing the drop height, so that the wastewater is fully contacted with the air, the content of dissolved oxygen in the wastewater is improved, and preparation is made for the subsequent catalytic oxidation reaction.
The manganese sand filter material is used for removing iron by adopting a contact oxidation method, wherein the manganese sand iron removal is realized by utilizing the catalytic oxidation effect of manganese dioxide in natural manganese sand to remove dissolved Fe2+Oxidized to ferric iron in the undissolved state, and then removed by filtration.
The regulating filter and the contact filter are provided with intervals, and water inlets and water outlets with bottom water inlet and upper water outlet staggered left and right are arranged between the intervals to form an S-shaped circuitous water flow direction, so that the wastewater is fully contacted with the fly ash and manganese sand filter material.
Adjusting a water inlet pipe and an air inlet pipe which are arranged at the bottoms of the filter chamber and the contact filter chamber and are used for back flushing, dredging sediments and recovering filtering capacity of the fly ash filter material and the manganese sand filter material through air-water back flushing, and returning supernatant after the back flushing wastewater is precipitated and then performing initial treatment again. The filtering effect is increased through the gas-water back washing, the service life of the fly ash filtering material and the manganese sand filtering material is greatly prolonged, and the use cost and the transportation cost are greatly reduced.
The utility model discloses an electric power, external use consumptive material quantity are few, and daily operation need not personnel on duty, only need regularly clear up the mud in the sedimentation tank, specially adapted traffic inconvenience, unmanned on duty's remote field environment. The whole investment can be greatly reduced compared with the current sewage treatment facility, the operation maintenance cost and the transportation cost of consumable materials are lower, and the method has good popularization value for realizing the standard discharge of the coal mine wastewater and protecting the environment.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
Parts and numbering in the figures:
1-a wellhead collecting tank; 2-a water collecting tank; 3-adjusting the filter tank; 4-a multistage drop channel; 5-a contact filter; 6-a first horizontal sedimentation tank; 7-a second horizontal flow sedimentation tank; 8-sand filter.
Detailed Description
The following examples are provided to illustrate the method and system for treating acidic iron-containing wastewater in mine, but are not intended to limit the scope of the present invention.
As shown in fig. 1, the system for treating the acidic iron-containing wastewater in the mine comprises a wellhead collecting tank 1, a collecting tank 2, a regulating filter tank 3, a multistage drop channel 4, a contact filter tank 5, a first advection sedimentation tank 6, a second advection sedimentation tank 7 and a sand filter tank 8;
the water outlet of the wellhead collecting tank 1 is connected with the water inlet of a water collecting tank 2 through a pipeline, the water outlet of the water collecting tank 2 is connected with the water inlet of an adjusting filter tank 3 through a pipeline, limestone macadam is paved in the water collecting tank 2, and a fly ash filter material is paved in the adjusting filter tank 3;
the adjusting filter 3 is connected with a contact filter 5 through a multistage drop channel 4, and a manganese sand filter material is paved in the contact filter 5;
the water outlet of the contact filter 5 is communicated with the water inlet of the sand filter 8 through a pipeline; quartz sand is paved in the sand filter 8;
the adjusting filter 3 is connected with a water inlet of a first horizontal sedimentation tank 6 through a pipeline, and a water outlet of the first horizontal sedimentation tank 6 is connected with the water collecting tank 2 through a pipeline provided with a water pump;
the contact filter 5 is connected with a water inlet of a second horizontal flow sedimentation tank 7 through a pipeline, and a water outlet of the second horizontal flow sedimentation tank 7 is connected with the water collecting tank 2 through a pipeline provided with a water pump.
A plurality of intervals are arranged in the adjusting filter 3, water inlets and water outlets with bottom water inlet and upper water outlet staggered left and right are arranged between the intervals to form an S-shaped circuitous water flow direction, and the contact area and the contact time with the fly ash filter material are further increased; and a water inlet pipe and an air inlet pipe for back flushing are arranged at the bottom of the adjusting filter 3. And (3) dredging sediments and recovering the filtering capacity of the filtering material through gas-water backwashing.
A plurality of intervals are arranged in the contact filter 5, water inlets and water outlets with bottom water inlet and upper water outlet staggered left and right are arranged between the intervals to form an S-shaped circuitous water flow direction, and the contact area and the contact time with the manganese sand filter material are further increased; and a water inlet pipe and an air inlet pipe for back flushing are arranged at the bottom of the contact filter 5. And (3) dredging sediments and recovering the filtering capacity of the filtering material through gas-water backwashing.
Carrying out the process
The utility model discloses implement the concrete process as follows to mine acid iron-bearing wastewater treatment:
step A, mine wastewater collection: collecting the dispersed wastewater gushed from the mine into a wellhead collecting tank 1;
step B, pH value preconditioning: introducing the wastewater into a water collecting tank 2 paved with limestone macadam, and carrying out primary reaction on the limestone and the acidic wastewater;
step C, pH value adjustment: b, introducing the wastewater treated in the step B into a regulating filter 3 paved with a fly ash filter material, and regulating the pH value to be more than 6; the wastewater and the fly ash fully react to further increase the pH value. Meanwhile, the reaction principle is as follows:
CaCO3+2H+═Ca2++CO2↑+H2O
CaO+H2O═Ca(OH)2
Ca(OH)2+2H+═Ca2++ 2H2O；
step D, drop aeration: the effluent of the adjusting filter 3 enters a multistage drop channel 4, drop aeration is carried out on the wastewater by utilizing the drop, so that the wastewater is fully contacted with air, and the content of dissolved oxygen in the wastewater is improved;
step E, catalytic oxidation: d, introducing the wastewater treated in the step D into a contact filter 5 paved with a manganese sand filter material, fully contacting the wastewater with the manganese sand filter material to generate catalytic oxidation reaction, and dissolving Fe2+Oxidizing into non-dissolved ferric iron;
step F, filtering and discharging: guiding the supernatant in the contact filter 5 to a sand filter 8 paved with quartz sand for filtering, further reducing the concentration of suspended matters and simultaneously reducing the chroma, and finishing the wastewater treatment;
g, backwashing of filter materials: after the system is used for a period of time, the fly ash filter material and the manganese sand filter material are subjected to gas-water back washing to dredge sediments, prevent blockage and recover the filtering capacity;
pumping clear water and air into the bottom of the adjusting filter 3 paved with the fly ash filter material and the bottom of the contact filter 5 paved with the manganese sand filter material through a water inlet pipe and an air inlet pipe which are arranged at the bottoms of the adjusting filter 3 and the contact filter 5 and used for back flushing, performing gas-water back flushing on the fly ash filter material and the manganese sand filter material, and dredging the fly ash filter material and the manganese sand filter material; the wastewater after the back washing of the adjusting filter 3 is introduced into a first horizontal sedimentation tank 6, and the wastewater after the back washing of the contact filter 5 is introduced into a second horizontal sedimentation tank 7; supernatant liquid after the first horizontal flow sedimentation tank 6 and the second horizontal flow sedimentation tank 7 are sedimentated is pumped by a pipeline and returned to the wellhead water collecting tank 1 for retreatment.
The particle size range of the limestone macadam paved in the water collecting tank 2 is 10-30 mm. Not only increases the specific surface area, but also is not easy to block.
The particle size range of the fly ash filter material paved in the adjusting filter 3 is 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
The particle size range of the manganese sand filter material paved in the contact filter 5 is 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
The particle size range of quartz sand paved in the sand filter 8 is 3-5 mm. Not only increases the specific surface area, but also is not easy to block.
The system is used in a more centralized area of a mine, and a plurality of wellhead collecting ponds 1 can be arranged. Is convenient for centralized treatment of mine wastewater.
The utility model discloses required electric power, external use consumptive material quantity are few, and daily operation need not personnel on duty, only need regularly clear up the mud in the sedimentation tank, specially adapted traffic inconvenience, unmanned on duty's remote open-air mine environment. The whole investment can be greatly reduced compared with the current sewage treatment facility, the operation and maintenance cost is low, and the method has good popularization value for realizing the standard discharge of the coal mine wastewater and environmental protection.
Claims (8)
1. A mine acidic iron-containing wastewater treatment system is characterized by comprising a wellhead collecting tank (1), a collecting tank (2), a regulating filter (3), a multi-stage water dropping channel (4), a contact filter (5), a first horizontal sedimentation tank (6), a second horizontal sedimentation tank (7) and a sand filter (8);
the water outlet of the wellhead collecting tank (1) is connected with the water inlet of the water collecting tank (2) through a pipeline, the water outlet of the water collecting tank (2) is connected with the water inlet of the adjusting filter tank (3) through a pipeline, limestone macadam is paved in the water collecting tank (2), and a fly ash filter material is paved in the adjusting filter tank (3);
the adjusting filter (3) is connected with a contact filter (5) through a multi-stage water drop channel (4), and a manganese sand filter material is paved in the contact filter (5);
the water outlet of the contact filter (5) is communicated with the water inlet of the sand filter (8) through a pipeline; quartz sand is paved in the sand filter (8);
the adjusting filter tank (3) is connected with a water inlet of a first horizontal sedimentation tank (6) through a pipeline, and a water outlet of the first horizontal sedimentation tank (6) is connected with the water collecting tank (2) through a pipeline provided with a water pump;
the contact filter tank (5) is connected with a water inlet of a second horizontal flow sedimentation tank (7) through a pipeline, and a water outlet of the second horizontal flow sedimentation tank (7) is connected with the water collecting tank (2) through a pipeline provided with a water pump.
2. The mine acidic iron-containing wastewater treatment system according to claim 1, wherein the bottom of the adjusting filter (3) is provided with a water inlet pipe and an air inlet pipe for back flushing.
3. The mine acidic iron-containing wastewater treatment system according to claim 1, wherein the bottom of the contact filter (5) is provided with a water inlet pipe and an air inlet pipe for back flushing.
4. The system for treating the mine acidic iron-containing wastewater as claimed in claim 1, wherein the particle size of the limestone macadam paved in the water collecting tank (2) is in the range of 10-30 mm.
5. The mine acidic iron-containing wastewater treatment system according to claim 1, wherein the particle size range of the fly ash filter material laid in the adjusting filter (3) is 3-5 mm.
6. The mine acidic iron-containing wastewater treatment system according to claim 1, wherein the manganese sand filter material laid in the contact filter tank (5) has a particle size range of 3-5 mm.
7. The mine acidic iron-containing wastewater treatment system according to claim 1, wherein the sand filter (8) is paved with quartz sand with a particle size range of 3-5 mm.
8. The system for treating the acidic iron-containing wastewater in the mine according to any one of claims 1 to 7, wherein the wellhead collecting pond (1) is multiple.
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| CN202020043888.8U CN211497230U (en) | 2020-01-09 | 2020-01-09 | Mine acidic iron-containing wastewater treatment system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110950464A (en) * | 2020-01-09 | 2020-04-03 | 四川省地质工程勘察院集团有限公司 | Method and system for treating acidic iron-containing wastewater of mine |
| CN115072902A (en) * | 2022-07-06 | 2022-09-20 | 东莞理工学院 | System and process for efficiently removing iron and manganese metal ions in acid mine wastewater |
-
2020
- 2020-01-09 CN CN202020043888.8U patent/CN211497230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110950464A (en) * | 2020-01-09 | 2020-04-03 | 四川省地质工程勘察院集团有限公司 | Method and system for treating acidic iron-containing wastewater of mine |
| CN115072902A (en) * | 2022-07-06 | 2022-09-20 | 东莞理工学院 | System and process for efficiently removing iron and manganese metal ions in acid mine wastewater |
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