CN214781248U - Zero discharge system for removing heavy metals and sulfate in mine water - Google Patents
Zero discharge system for removing heavy metals and sulfate in mine water Download PDFInfo
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- CN214781248U CN214781248U CN202120623655.XU CN202120623655U CN214781248U CN 214781248 U CN214781248 U CN 214781248U CN 202120623655 U CN202120623655 U CN 202120623655U CN 214781248 U CN214781248 U CN 214781248U
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Abstract
The utility model provides a zero discharge system for removing heavy metals and sulfate in mine water, which comprises a primary precipitation system, a filtration concentration system, a secondary precipitation system, an electrooxidation complexation system and an aging precipitation system which are connected in sequence; the primary precipitation system is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtering and concentrating system is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system is used for enabling sulfate radicals, heavy metal ions and a coagulant in the mine water to react to generate precipitates and remove the precipitates, the electrooxidation complexing system is used for primarily generating sulfate radical-containing composite complex salt precipitates under the action of a thickening agent and an electric field, and the aging precipitation system is used for aging the mine water and further generating sulfate radical-containing composite complex salt precipitates under the action of a coagulant aid so as to remove the heavy metals and sulfate mine water. The utility model discloses make the play water sulfate radical stably be less than 250ppm, reach drinking water concentration standard.
Description
Technical Field
The utility model relates to a water treatment technical field, concretely relates to get rid of zero discharge system of mine aquatic heavy metal and sulfate.
Background
Acid mine water is a serious environmental problem, corrodes mine pipelines and equipment, pollutes surface water and soil, destroys natural landscapes, harms animals and plants, directly influences the health of miners and belongs toA major obstacle to the continued development of coal mines. The pyrite in coal-series stratum and coal is the material basis of raw acid, and the acidity of mine water is strong or weak, namely H is generated by biological oxidation2SO4And the sulfur content in various coal beds and surrounding rocks mainly containing Fe is closely related to the mining mode, geological conditions and the like. Acid mine water is common in coal mines in south China, and incomplete statistics shows that the pH value is 2.3-5.7. The acidic mine water generally contains Fe2+，Ca2+，Mg2+，Mn2+Plasma metal ion and SO4 2-，Cl-，HCO3 -The anion, along with the pH value is gradually reduced in the acid production process, the metal ions and other impurities are increased, and the water quality becomes complicated.
The physical and chemical properties of the acidic mine water are greatly different, but the common characteristic is that the pH value is lower, and is generally between 2 and 5. Since the acidic hydrophobic water is composed of sulfide, mainly pyrite (FeS)2) Oxidation is generated, SO Fe and SO in the water4 2-The concentration of (A) is very high, and the total iron content is generally between 300 and 800 mg/L. The COD value of the acidic mine water is usually very high due to the large amount of coal dust contained in the water and the influence of artificial activities in the mining process. The acidic mine water in China is basically treated by a neutralization chemical method, and alkaline agents are added or limestone and dolomite are taken as filter materials for filtration and neutralization.
The equipment of the acid mine water neutralization method is complex, large in noise, poor in environmental condition and serious in secondary pollution. Reaction product CaSO4Mixed with excess limestone, are difficult to handle and difficult to handle by precipitating CaSO4Adding SO4 2-The concentration of (A) is reduced to below 250mg/L, and SO can be further precipitated by a neutralization method only after the membrane method salt separation concentration4 2-However, the membrane method has large using amount of softening agent, high investment and operation cost, low average water yield and easy pollution and blockage of the membrane component.
Because the zero-emission system mainly based on the membrane technology has large investment and high operation and maintenance difficulty, the application of the membrane technology to near zero emission of mine water is hindered. In order to optimize the cost and efficiency of the process, the patent develops a unique zero emission technology, so that the use number of membrane systems is reduced, and the investment operation cost is reduced.
Disclosure of Invention
The utility model relates to a solve the processing problem of acid mine water, provide a zero discharge system who gets rid of heavy metal and sulfate, including electric flocculation reactor or coagulation reaction pond, make the SS of mine water <5ppm, heavy metal content <0.1ppm, obtain through ultrafiltration, reverse osmosis system and produce water and concentrate (decrement 30%). The concentration of sulfate radical is initially reduced to 1000-2000ppm by adding lime into the concentrated solution, a special thickening agent is added into the clear solution after precipitation, and a composite salt precipitate containing sulfate radical is formed by an electrooxidation complexing unit, so that the sulfate radical of the effluent is stably lower than 250ppm, and the sulfate radical concentration standard of drinking water and surface three-class water standard is reached. The precipitates can be used as raw materials in commercial industries, such as road fillers and other building materials using GYPSUM materials.
The utility model provides a zero discharge system for removing heavy metals and sulfate in mine water, which comprises a primary precipitation system, a filtration concentration system, a secondary precipitation system, an electrooxidation complexation system and an aging precipitation system which are connected in sequence;
the system comprises a primary precipitation system, a filtration and concentration system, a secondary precipitation system, an electrooxidation complexing system, an aging precipitation system and a coagulant aid, wherein the primary precipitation system is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtration and concentration system is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system is used for reacting sulfate radicals, heavy metal ions and the coagulant in the mine water to generate precipitates and remove the precipitates, the electrooxidation complexing system is used for primarily generating a sulfate radical-containing composite complex salt precipitate under the action of the thickener and an electric field, and the aging precipitation system is used for aging the mine water and further generating a sulfate radical-containing composite complex salt precipitate under the action of the coagulant aid so as to remove the heavy metals and sulfate mine water;
the filtering and concentrating system comprises an ultrafiltration system and a reverse osmosis device which are connected in sequence;
the secondary sedimentation system comprises a coagulation dosing tank;
the electrooxidation complexing system comprises an electrooxidation complexing device, and the electrooxidation complexing device comprises a plate electrode;
the aging and precipitating system comprises a stirring pool;
the concentrated water outlet of the reverse osmosis device is connected with a secondary sedimentation system, and the electrooxidation complexing device is connected with the stirring tank.
The utility model discloses a zero discharge system for removing heavy metal and sulfate in mine water, as the preferred mode, the secondary sedimentation system also includes a first buffer pool and a first sedimentation pool, the coagulation dosing pool is arranged between the first buffer pool and the first sedimentation pool;
the electrooxidation complexing system also comprises a second buffer pool connected with the electrooxidation complexing device;
the concentrated water outlet of the reverse osmosis device is connected with the first buffer tank, and the first sedimentation tank is connected with the second buffer tank.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, preliminary sedimentation system is including the third buffer pool, electric flocculation reactor and the second sedimentation tank that connect gradually, the second sedimentation tank links to each other with ultrafiltration system, electric flocculation reactor is used for making the heavy metal and the preliminary formation of suspended solid of mine aquatic deposit.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, preliminary sedimentation system is including the third buffer pool, coagulation reaction tank and the second sedimentation tank that connect gradually, the second sedimentation tank links to each other with ultrafiltration system, the coagulation reaction tank is used for making the heavy metal and the suspended solid of mine aquatic tentatively form the sediment under the effect of lime or sodium carbonate.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, ultrafiltration system is vertical.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, ultrafiltration system includes PVDF hollow fiber membrane.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, the plate electrode is aluminium electrode or stainless steel electrode or copper electrode.
Get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, plate electrode is the aluminium electrode.
Get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, the plate electrode interval is 10 ~ 50 cm.
A get rid of zero discharge system of mine aquatic heavy metal and sulphate, as preferred mode, the stirring pond is including stirring pond body, set up water inlet on stirring pond body, dosing port, mud discharging port, produce the mouth of a river and set up at the inside agitating unit of stirring pond body, the water inlet links to each other with the electrooxidation complexation device, the dosing port is used for adding the coagulant aid, the mud discharging port is used for discharging the compound complex salt of sulphur radical that subsides and deposits, it is used for discharging to get rid of heavy metal and sulphate mine water to produce the mouth of a river.
The implementation mode is as follows:
the first step is as follows: the feed water stream is passed through an electrocoagulation reactor to remove all heavy metals and suspended solids SS. According to the concentration of pollutants, the electric flocculation treatment can be avoided, heavy metals and suspended matters are combined together and settled and removed by adding lime/sodium carbonate, and coagulant aids such as ferric salt, aluminum salt, polyacrylamide and the like can be used for coagulation. The heavy metal content of the effluent at this stage is less than 0.1ppm and the SS content is less than 5 ppm.
The second step: the treated feed was pumped into a vertical Ultrafiltration (UF) system: the PVDF hollow fiber membrane can realize a high-efficiency filtration process. And pumping the filtered produced water into a low-pollution reverse osmosis membrane system to store and recycle, wherein the concentrated solution is about 30% of the inlet water.
The third step: the concentrate is now fed to the following three treatment stages: and (3) the concentrated solution enters a first buffer tank, lime is added as a coagulant to form calcium sulfate precipitate and heavy metal hydroxide precipitate, and sulfate radicals, most of metal ions and other impurities are primarily removed. After precipitation treatment, the supernatant enters a second buffer tank with a stirrer, a polyvalent metal thickener (hydrotalcite or hydrotalcite-like compound, such as calcium aluminum hydrotalcite or magnesium aluminum hydrotalcite) is added, after mixing, the solution is sent into an electrooxidation complexing device, the device is a plate electrode, the electrode spacing is 10-50 cm, the device is one of an aluminum electrode, a stainless steel electrode and a copper electrode, preferably the aluminum electrode, after electrifying reaction is carried out for 10 min-5 h, the solution enters a stirring tank for aging, the aging time is 10 min-48 h, one or more coagulant aids (aluminum salt, ferric salt or polyacrylamide) are added, effluent is obtained after precipitation, and sludge generated by the process is sulfate radical-containing composite salt precipitate which can be used as a raw material in the commercial industry, such as road fillers and other building materials using GYPSUM materials.
The utility model has the advantages of it is following:
(1) the method is simple, the investment and operation cost is low, the buffer tank, the sedimentation tank, the coagulation reaction tank, the electrooxidation complexing device and the stirring tank are used as main equipment, the cost is low, the maintenance is easy, the treatment method is simple, the operation is easy, the ultrafiltration system and the reverse osmosis device are used as auxiliary equipment, the efficiency is high, and the average water yield is high.
(2) The removal effect is good, the concentration of the removed sulfuric acid is lower than 1000-2000ppm, and the standard of surface III class water is reached.
(3) The precipitate produced by the process is a sulfate-containing complex salt precipitate which can be used as a raw material in commercial industries such as road fillers and other building materials using GYPSUM materials.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment 1 of a zero-emission system for removing heavy metals and sulfates from mine water;
FIG. 2 is a schematic structural diagram of an embodiment 2 of the zero-emission system for removing heavy metals and sulfates from mine water;
fig. 3 is a schematic structural diagram of embodiment 3 of the zero-emission system for removing heavy metals and sulfates from mine water.
Reference numerals:
1. a preliminary sedimentation system; 11. a third buffer pool; 12. an electrocoagulation reactor; 13. a second sedimentation tank; 14. a coagulation reaction tank; 2. a filtration and concentration system; 21. an ultrafiltration system; 22. a reverse osmosis unit; 3. a secondary sedimentation system; 31. a coagulation dosing tank; 32. a first buffer pool; 33. a first sedimentation tank; 4. an electro-oxidative complexing system; 41. an electrooxidation complexing device; 42. a second buffer pool; 5. aging the precipitation system; 51. and (4) a stirring tank.
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 zero discharge system for removing heavy metals and sulfates from mine water comprises a primary precipitation system 1, a filtration and concentration system 2, a secondary precipitation system 3, an electrooxidation and complexation system 4 and an aging and precipitation system 5 which are connected in sequence;
the primary precipitation system 1 is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtering and concentrating system 2 is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system 3 is used for enabling sulfate radicals and heavy metal ions in the mine water to react with a coagulant to generate precipitates and remove the precipitates, the electro-oxidation complexing system 4 is used for primarily generating a sulfate radical-containing composite complex salt precipitate under the action of a thickening agent and an electric field, and the aging precipitation system 5 is used for aging the mine water and further generating a sulfate radical-containing composite complex salt precipitate under the action of a coagulant aid so as to obtain the mine water with the heavy metals and the sulfate removed;
the filtering and concentrating system 2 comprises an ultrafiltration system 21 and a reverse osmosis device 22 which are connected in sequence;
the secondary sedimentation system 3 comprises a coagulation dosing tank 31;
the electrooxidation complexing system 4 comprises an electrooxidation complexing device 41, and the electrooxidation complexing device 41 comprises a plate electrode;
the aging and settling system 5 comprises a stirring tank 51;
the concentrated water outlet of the reverse osmosis device 22 is connected with the secondary sedimentation system 3, and the electro-oxidation complexing device 41 is connected with the stirring pool 51.
Example 2
As shown in fig. 2, a zero-emission system for removing heavy metals and sulfates from mine water comprises a primary precipitation system 1, a filtration and concentration system 2, a secondary precipitation system 3, an electrooxidation and complexation system 4 and an aging and precipitation system 5 which are connected in sequence;
the primary precipitation system 1 is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtering and concentrating system 2 is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system 3 is used for enabling sulfate radicals and heavy metal ions in the mine water to react with a coagulant to generate precipitates and remove the precipitates, the electro-oxidation complexing system 4 is used for primarily generating a sulfate radical-containing composite complex salt precipitate under the action of a thickening agent and an electric field, and the aging precipitation system 5 is used for aging the mine water and further generating a sulfate radical-containing composite complex salt precipitate under the action of a coagulant aid so as to obtain the mine water with the heavy metals and the sulfate removed;
the preliminary sedimentation system 1 comprises a third buffer tank 11, an electric flocculation reactor 12 and a second sedimentation tank 13 which are connected in sequence, the second sedimentation tank 13 is connected with an ultrafiltration system 21, and the electric flocculation reactor 12 is used for preliminarily forming sediments of heavy metals and suspended matters in mine water;
the filtering and concentrating system 2 comprises an ultrafiltration system 21 and a reverse osmosis device 22 which are connected in sequence; the ultrafiltration system 21 is vertical; the ultrafiltration system 21 comprises a PVDF hollow fiber membrane;
the secondary sedimentation system 3 comprises a first buffer tank 32, a coagulation dosing tank 31 and a first sedimentation tank 33 which are connected in sequence;
the electrooxidation complexing system 4 comprises an electrooxidation complexing device 41 and a second buffer pool 42 which are connected in sequence, wherein the electrooxidation complexing device 41 comprises a plate electrode; the plate electrode is an aluminum electrode or a stainless steel electrode or a copper electrode; the distance between the plate electrodes is 10-50 cm;
the concentrated water outlet of the reverse osmosis device 22 is connected with the first buffer tank 32, the first sedimentation tank 33 is connected with the second buffer tank 42,
the aging and settling system 5 comprises a stirring tank 51;
the concentrated water outlet of the reverse osmosis device 22 is connected with the secondary sedimentation system 3, and the electrooxidation complexing device 41 is connected with the stirring pool 51;
the stirring pool 51 comprises a stirring pool body, a water inlet, a dosing port, a sludge discharge port, a water production port and a stirring device, wherein the water inlet, the dosing port and the sludge discharge port are arranged on the stirring pool body, the stirring device is arranged inside the stirring pool body, the water inlet is connected with the electrooxidation complexing device 41, the dosing port is used for adding a coagulant aid, the sludge discharge port is used for discharging settled sulfate-containing composite complex salt precipitate, and the water production port is used for discharging and removing heavy metal and sulfate mine water.
Example 3
As shown in fig. 3, a zero discharge system for removing heavy metals and sulfates from mine water comprises a primary precipitation system 1, a filtration and concentration system 2, a secondary precipitation system 3, an electrooxidation and complexation system 4 and an aging and precipitation system 5 which are connected in sequence;
the primary precipitation system 1 is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtering and concentrating system 2 is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system 3 is used for enabling sulfate radicals and heavy metal ions in the mine water to react with a coagulant to generate precipitates and remove the precipitates, the electro-oxidation complexing system 4 is used for primarily generating a sulfate radical-containing composite complex salt precipitate under the action of a thickening agent and an electric field, and the aging precipitation system 5 is used for aging the mine water and further generating a sulfate radical-containing composite complex salt precipitate under the action of a coagulant aid so as to obtain the mine water with the heavy metals and the sulfate removed;
the preliminary sedimentation system 1 comprises a third buffer tank 11, a coagulation reaction tank 14 and a second sedimentation tank 13 which are connected in sequence, the second sedimentation tank 13 is connected with an ultrafiltration system 21, and the coagulation reaction tank 14 is used for preliminarily forming sediments from heavy metals and suspended matters in mine water under the action of lime or sodium carbonate;
the filtering and concentrating system 2 comprises an ultrafiltration system 21 and a reverse osmosis device 22 which are connected in sequence; the ultrafiltration system 21 is vertical; the ultrafiltration system 21 comprises a PVDF hollow fiber membrane;
the secondary sedimentation system 3 comprises a first buffer tank 32, a coagulation dosing tank 31 and a first sedimentation tank 33 which are connected in sequence;
the electrooxidation complexing system 4 comprises an electrooxidation complexing device 41 and a second buffer pool 42 which are connected in sequence, wherein the electrooxidation complexing device 41 comprises a plate electrode; the plate electrode is an aluminum electrode or a stainless steel electrode or a copper electrode; the distance between the plate electrodes is 10-50 cm;
the concentrated water outlet of the reverse osmosis device 22 is connected with the first buffer tank 32, the first sedimentation tank 33 is connected with the second buffer tank 42,
the aging and settling system 5 comprises a stirring tank 51;
the concentrated water outlet of the reverse osmosis device 22 is connected with the secondary sedimentation system 3, and the electrooxidation complexing device 41 is connected with the stirring pool 51;
the stirring pool 51 comprises a stirring pool body, a water inlet, a dosing port, a sludge discharge port, a water production port and a stirring device, wherein the water inlet, the dosing port and the sludge discharge port are arranged on the stirring pool body, the stirring device is arranged inside the stirring pool body, the water inlet is connected with the electrooxidation complexing device 41, the dosing port is used for adding a coagulant aid, the sludge discharge port is used for discharging settled sulfate-containing composite complex salt precipitate, and the water production port is used for discharging and removing heavy metal and sulfate mine water.
The method of use of examples 1-3 was:
the first step is as follows: the feed water stream is passed through an electrocoagulation reactor 12 to remove all heavy metals and suspended solids SS. According to the concentration of pollutants, the electric flocculation treatment can be avoided, heavy metals and suspended matters are combined together and settled and removed by adding lime/sodium carbonate, and coagulant aids such as ferric salt, aluminum salt, polyacrylamide and the like can be used for coagulation. The heavy metal content of the effluent at this stage is less than 0.1ppm and the SS content is less than 5 ppm.
The second step: the treated feed is pumped to a vertical Ultrafiltration (UF) system 21: the PVDF hollow fiber membrane can realize a high-efficiency filtration process. And pumping the filtered produced water into a low-pollution reverse osmosis membrane system 22 to produce, store and recycle, wherein the concentrated solution is about 30% of the inlet water.
The third step: the concentrate is now fed to the following three treatment stages: the concentrated solution enters a first buffer tank 32, and lime is added as a coagulant to form calcium sulfate precipitation and heavy metal hydroxide precipitation so as to primarily remove sulfate radicals, most of metal ions and other impurities. After the precipitation treatment, the supernatant enters a second buffer tank 42 with a stirrer, a polyvalent metal thickener (hydrotalcite or hydrotalcite-like compound, such as calcium aluminum hydrotalcite or magnesium aluminum hydrotalcite) is added, the mixture is sent to an electrooxidation complexing device 41, the device is a plate electrode, the electrode distance is 10-50 cm, the device is one of an aluminum electrode, a stainless steel electrode and a copper electrode, preferably the aluminum electrode, the solution is aged in a stirring tank 51 after being electrified for 10 min-5 h, one or more coagulants (aluminum salt, iron salt or polyacrylamide) are added, and water is obtained after the precipitation, wherein the aging time is 10 min-48 h.
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 (10)
1. The utility model provides a get rid of zero discharge system of heavy metal and sulphate in mine water which characterized in that: comprises a primary precipitation system (1), a filtration and concentration system (2), a secondary precipitation system (3), an electrooxidation and complexation system (4) and an aging and precipitation system (5) which are connected in sequence;
the primary precipitation system (1) is used for primarily forming precipitates of heavy metals and suspended matters in mine water so as to reduce the heavy metal content and the solid suspended matter content of the mine water, the filtration and concentration system (2) is used for filtering impurities in the mine water and concentrating the impurities, the secondary precipitation system (3) is used for enabling sulfate radicals and heavy metal ions in the mine water to react with a coagulant to generate precipitates and remove the precipitates, the electrooxidation complexing system (4) is used for primarily generating a sulfate radical-containing composite complex salt precipitate under the action of a thickening agent and an electric field, and the aging precipitation system (5) is used for aging the mine water and further generating a sulfate radical-containing composite complex salt precipitate under the action of a coagulant aid so as to obtain the mine water with the heavy metals and the sulfate radicals removed;
the filtering and concentrating system (2) comprises an ultrafiltration system (21) and a reverse osmosis device (22) which are connected in sequence;
the secondary sedimentation system (3) comprises a coagulation dosing pool (31);
the electro-oxidation complexing system (4) comprises an electro-oxidation complexing device (41), wherein the electro-oxidation complexing device (41) comprises a plate electrode;
the aging and precipitating system (5) comprises a stirring tank (51);
the concentrated water outlet of the reverse osmosis device (22) is connected with the secondary sedimentation system (3), and the electrooxidation complexing device (41) is connected with the stirring pool (51).
2. The system of claim 1, wherein the system is characterized by the following features: the secondary sedimentation system (3) further comprises a first buffer tank (32) and a first sedimentation tank (33), and the coagulation dosing tank (31) is arranged between the first buffer tank (32) and the first sedimentation tank (33);
the electro-oxidation complexing system (4) also comprises a second buffer pool (42) connected with the electro-oxidation complexing device (41);
the concentrated water outlet of the reverse osmosis device (22) is connected with the first buffer tank (32), and the first sedimentation tank (33) is connected with the second buffer tank (42).
3. The system of claim 2, wherein the system is characterized by the following features: preliminary sedimentation system (1) is including the third buffer pool (11), electric flocculation reactor (12) and second sedimentation tank (13) that connect gradually, second sedimentation tank (13) with ultrafiltration system (21) link to each other, electric flocculation reactor (12) are used for making heavy metal and suspended solid in the mine water preliminarily form the sediment.
4. The system of claim 2, wherein the system is characterized by the following features: the preliminary sedimentation system (1) comprises a third buffer tank (11), a coagulation reaction tank (14) and a second sedimentation tank (13) which are sequentially connected, the second sedimentation tank (13) is connected with the ultrafiltration system (21), and the coagulation reaction tank (14) is used for making heavy metals and suspended matters in the mine water preliminarily form sediments under the action of lime or sodium carbonate.
5. The system of claim 1, wherein the system is characterized by the following features: the ultrafiltration system (21) is vertical.
6. The system of claim 1, wherein the system is characterized by the following features: the ultrafiltration system (21) comprises a PVDF hollow fiber membrane.
7. The system of claim 1, wherein the system is characterized by the following features: the plate electrode is an aluminum electrode or a stainless steel electrode or a copper electrode.
8. The system of claim 7, wherein the system is characterized by the following features: the plate electrode is an aluminum electrode.
9. The system of claim 7, wherein the system is characterized by the following features: the distance between the plate electrodes is 10-50 cm.
10. The system of claim 1, wherein the system is characterized by the following features: stirring pond (51) are in including stirring pond body, setting water inlet, dosing port, mud discharging port on the stirring pond body, produce the mouth of a river and set up at the inside agitating unit of stirring pond body, the water inlet with electrooxidation complexing device (41) link to each other, the dosing port is used for adding the coagulant aid, the mud discharging port is used for discharging the settlement contain the compound complex salt of sulfate radical and deposit, it is used for discharging to produce the mouth of a river get rid of heavy metal and sulfate mine water.
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| CN202120623655.XU CN214781248U (en) | 2021-03-26 | 2021-03-26 | Zero discharge system for removing heavy metals and sulfate in mine water |
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| CN202120623655.XU CN214781248U (en) | 2021-03-26 | 2021-03-26 | Zero discharge system for removing heavy metals and sulfate in mine water |
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