CN101830585A - Acid mine water treatment system - Google Patents
Acid mine water treatment system Download PDFInfo
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- CN101830585A CN101830585A CN 201010186893 CN201010186893A CN101830585A CN 101830585 A CN101830585 A CN 101830585A CN 201010186893 CN201010186893 CN 201010186893 CN 201010186893 A CN201010186893 A CN 201010186893A CN 101830585 A CN101830585 A CN 101830585A
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Abstract
The invention discloses an acid mine water treatment system and belongs to the field of water treatment. The system consists of a neutralization system, a coagulation sedimentation system, a filtration system, a reverse osmosis system and a sterilization system which are connected in turn, wherein the coagulation sedimentation system comprises a mixing region, a reaction region, a transition region and a settling region; the mixing region is communicated with the reaction region, the transition region and the settling region in turn; the water inlet of the mixing region is communicated with the water outlet of the neutralization system; the water outlet of the settling region is communicated with the water inlet of the filtration system; and the filtration system comprises a manganese sand filter in which a modified manganese sand filter material modified by 1 to 7 mass percent potassium permanganate solution is arranged. Four regions are arranged in the coagulation sedimentation system of the system, so coagulation treatment effect is enhanced; and the modified manganese sand filter material is adopted in the manganese sand filter, so the effect of removing ferro-manganese ions in the mine water is enhanced and the aim of treating and recycling the acid mine water with high turbidity, high ferro-manganese content and high mineralization is fulfilled.
Description
Technical field
The present invention relates to the pit water processing technology field, relate in particular to a kind of acid mine water treatment system.
Background technology
China is lack of water country, and shortage of water resources has had a strong impact on the development of people's lives and economic society.Pit water is a kind of pollutent with industry characteristic, also is a kind of precious water resource.About 2,200,000,000 tons of the annual discharging in only state-owned emphasis colliery pit water, 1 ton of raw coal of average every exploitation need discharge 2 tons of waste water, has not only wasted great lot of water resources, and has caused environmental pollution.In the face of severe lack of water situation, the purifying treatment pit water, making it rationally to be utilized is the effective way that solves shortage of water resources, especially for the abundant city of coal mine water resources.
Characteristic according to the mine water pollution thing generally is divided into pit water: conventional pit water, highly-mineralized mine water, acid mine water and special contamination pit water.Wherein, acid mine water is big source of pollution in colliery, low because of acid mine water pH value, acidity is big, and contain a large amount of heavy metals, generally all directly recycles enter water bodys such as near river, mine, lake usually, but the pH value of water bodys such as river, lake is changed, suppress or stoped bacterium and microbial growth, hinder the self-cleaning of water body.Mineral substance in acid mine water and the water body interacts and can generate some salt, growth to limnobios and plant can produce detrimentally affect, cause mining area water body on every side by severe contamination, can cause most hydrobiont death such as fish, algae, planktonic organism; And acid mine water can destroy the crumb structure of soil, makes the hardening soil, and farm crop are withered and yellow; Under the anoxybiotic state, a large amount of SO in the acid mine water
2 4-Be subjected to the effect of desulfurization mushroom, the H that is produced
2S gas has serious toxic action to organism; Acid mine water can produce the effect of intensive corrosion failure to the water pump accessory in the mine, tubing, tunnel equipment simultaneously, causes maintenance of equipment frequent, more can directly endanger miner's safety.Pollute if natural water body is subjected to acid mine water for a long time, can make water quality acidifying gradually, cause serious destruction to ecotope.Therefore, must administer timely and effectively acid mine water.Because the most of lack of water in the coal mining area of China, therefore many areas require pit water must satisfy the reuse requirement after treatment.
To the processing of acid mine water, domestic and international many scholars have carried out a large amount of research to its origin cause of formation and the method for preventing and treating, and generally adopt methods such as neutralisation, biological process and artificial swamp method to handle.But in the neutralisation that adopts, neutralizing agent often adopts lime usually, and this technology is easy to generate CaSO
4Deng scale forming matter, cause secondary pollution.The neutralisation surge capability is poor simultaneously, and dosage is wayward, and it is excessive to have caused medicament to add, the water outlet meta-alkalescence, and cause processing cost to raise.
At present in the treatment technology of China's pit water, general coagulating sedimentation+the filtration process that adopts, existing technical manual all adopts the G value and the GT value of underground water/surface water coagulating sedimentation technology to design, China's underground water/surface water turbidity is generally less than 100NTU, and concentration is more stable, concentration of suspension changes greatly (10～1000mg/L) in the pit water, concentration of suspension even up to several ten thousand mg/L when bringing down stocks, suspended substance in the pit water is mainly by the light-weight coal dust, rock dust and partial organic substances are formed, suspended substance exists remarkable difference in water chemistry character and sedimentation behavior and the underground water/surface water, adopt the G value of recommending in the present handbook not only can't obtain satisfied treatment effect, also can make simultaneously in the inclined-plate clarifying basin because of holding the avalanche of too much suspended substance colloid.
Ferric manganese ore well water treatment process is to design according to the surface water deferrization and demanganization process at present.Iron level is no more than tens mg/L in conventional underground water/surface water, and manganese content is no more than 8mg/L, adopts sophisticated aeration-filtration with manganese sand method to remove, because the pH value of this moment is higher, and Fe
2+Easily be oxidized to Fe
3+, just it can be removed by quiet sinking.Pit water is because funneling effect, ground and water mutual effect make iron level reach hundreds of mg/L, manganese content reaches tens mg/L, and the pH value of pit water is lower, and ferrous iron, manganese are difficult to oxidation, the filtrate ripening stage long (1-2 month) when adopting filtration with manganese sand to remove, the frequent severe overweight of water outlet manganese content.
Therefore, to finding the existing acid mine water treatment process introduction that existing processes can't realize the economical and efficient of high turbidity, high ferrimanganic, high salinity acid mine water is handled, can satisfy reuse requirement after also can't guaranteeing to handle from above-mentioned.
Summary of the invention
Based on above-mentioned existing in prior technology problem, the purpose of the embodiment of the invention provides a kind of acid mine water treatment system, can turbid to height, high ferrimanganic, the high salinity acid mine water carries out the processing of economical and efficient, and make the water outlet after the processing reach reuse standard.
The embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of acid mine water treatment system, this system is formed by connecting in turn by neutralized system, coagulating sedimentation system, filtering system, reverse osmosis system and sterilisation system, wherein, the water-in of described neutralized system is as the water-in of introducing the acid mine water of handling, and the water outlet of described sterilisation system is as the clear water relief outlet after handling;
Described coagulating sedimentation system comprises mixing zone, reaction zone, zone of transition and settling region, and described mixing zone is communicated with successively with reaction zone, zone of transition and settling region; The water-in of described mixing zone is communicated with the water outlet of described neutralized system; The water outlet of described settling region is communicated with the water-in of described filtering system;
Described filtering system comprises the filtration with manganese sand device, and being provided with in the described filtration with manganese sand device with mass concentration is the modification manganese sand filtering material of 1～7% potassium permanganate solution modification.
The technical scheme that provides by the invention described above embodiment as can be seen, in the embodiment of the invention by neutralized system, the coagulating sedimentation system, filtering system, the treatment system that reverse osmosis system and sterilisation system constitute to acid mine water, owing in the coagulating sedimentation system, the mixing zone is set, reaction zone, four treatment zones such as zone of transition and settling region, wherein mixing zone and reaction zone can be used as the two-stage stirring area and cooperate with the one-level zone of transition, can make the acid mine water that enters after stirring is mixed in the mixing zone, make coagulating agent and pulverized coal particle thorough mixing and take off steady, and the pit water after handling can make after stirring once more in reaction zone and takes off steady coal dust colloid thorough mixing and form flco, zone of transition can make takes off the further slaking of flco that steady back forms, and has effectively improved the lightweight coal dust effect of settling of pit water middle and high concentration; Adopting in the filtration with manganese sand jar of the filtering system of this system with mass concentration is the manganese sand filtering material of 1～7% potassium permanganate solution modification, and this filtrate has higher specific surface area than conventional manganese sand filtering material, can remove the ferromanganese ion in the water efficiently; Can economical and efficient ground handle high turbidity, high ferrimanganic, high salinity acid mine water by this treatment system, avoided existing Generic Processing System fluctuation of service, processing costs height, water outlet usually can't be up to standard, go out environmental pollution by water etc. problem.
Description of drawings
The structural representation of the acid mine water treatment system that Fig. 1 provides for the embodiment of the invention;
Each label is among the figure: the A-water inlet; The B-water outlet; The 1-radical sedimentation basin; 2-neutralizing agent preparation case; The 3-neutralized system; The 4-gas blower; 5-coagulating sedimentation system; The 6a-high-pressure pump; The 6b-high-pressure pump; 7-filtration with manganese sand device; 8-fine sand strainer; The 9-back flushing tank; The 10-strainer of ensuring public security; The 11-reverse osmosis system; The 12-high-pressure pump; The 13-chlorinating equipment; The 14-sterilization pool; The 15-sludge thickener; The 16-sludge dehydration device; The 17a-backwashing pump; The 17b-backwashing pump; The 18-backwashing pump; 19-radical sedimentation basin water-in; The 20-radical sedimentation basin is collected canal; 21-radical sedimentation basin water outlet; 22-storage mud district; 23-neutralized system water-in; The 24-neutralization tank; The 25-neutralizing agent adds mouth; The 26-volume pump; 27-pH value on-Line Monitor Device; The 28-controlling box; The 29-agitator; The 30-aeration tank; 31-neutralized system water outlet; 32-coagulating sedimentation system water-in; The 33-mixing zone; The 34-reaction zone; The 35-zone of transition; The 36-settling region; The 37-agitator; 38-filtration with manganese sand device water-in; 39-filtration with manganese sand device water outlet; 40-fine sand strainer water-in; 41-fine sand strainer water outlet; 42-security personnel strainer water-in; 43-security personnel strainer water outlet; 44-reverse osmosis system water-in; 45-reverse osmosis system water outlet; 46-sterilization pool water-in; The 47-sterilization pool; 48-sterilization pool water outlet; The 49-sludge bucket; The 50-sludge pump; The 51-sump pump.
Embodiment
For ease of understanding, the invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment one
Present embodiment provides a kind of acid mine water treatment system, can turbid to height, high ferrimanganic, the acid mine water of high salinity handles, can make water outlet reach the reuse water standard after the processing, as shown in Figure 1, this system is formed by connecting by neutralized system, coagulating sedimentation system, filtration with manganese sand device, fine sand strainer, reverse osmosis system, sterilisation system, wherein, the water-in of described neutralized system is as the water-in of introducing the waste water of handling, and the water outlet of described sterilisation system is as the clear water relief outlet;
Wherein, for being separated into two lattice that closely link to each other, first lattice are neutralization tank in the neutralized system, and second lattice are the aeration tank; The neutralizing agent that is provided with water-in and interpolation light-burning magnesium powder solution neutralizing agent on neutralization tank adds mouth, be provided with whipping appts in the neutralization tank, the water-in of neutralization tank is as the neutralized system water-in, pit water in the neutralization tank flows into the aeration tank by the dividing plate between neutralization tank and the aeration tank, the aeration tank water outlet is provided with microporous aeration device and gas blower as the water outlet of neutralized system in the bottom, aeration tank; Be provided with sludge bucket at neutralization tank and bottom, aeration tank, be used to collect mud.
Described coagulating sedimentation system comprises mixing zone, reaction zone, zone of transition and settling region, and described mixing zone is communicated with successively with reaction zone, zone of transition and settling region; The water-in of described mixing zone is communicated with the water outlet of described neutralized system; The water outlet of described settling region is communicated with the water-in of described filtering system;
Above-mentioned coagulating sedimentation system can adopt whole reaction tank, in reaction tank, be separated into four lattice that link to each other successively, first lattice are the mixing zone, second lattice are reaction zone, the 3rd lattice are zone of transition, and the 4th lattice are the settling region, and the current of mixing zone are crossed dividing plate from last inflow reaction zone, the current of reaction zone are crossed dividing plate from last inflow zone of transition, and zone of transition water flows into the settling region by the bottom; Be equipped with agitator in mixing zone and reaction zone, the agitator of mixing zone is located at the middle part in the mixing zone, and the agitator of reaction zone is located at the bottom in the reaction zone; The rotating speed of agitator all can be adjusted, and the G value regulation range of generally controlling the agitator of mixing zone is 30～500S
-1The G value regulation range of the agitator of control reaction zone is 5～10S
-1The bottom of described mixing zone, reaction zone, zone of transition and settling region also is provided with sludge bucket, and the mud of sludge bucket is discharged in the concentration basin by shore pipe;
Settling region in the above-mentioned coagulating sedimentation system generally adopts the labyrinth inclined-plate clarifying basin, wherein, the swash plate that swash plate can adopt the non-toxic polyvinyl chloride material to make, swash plate is provided with fin.
The water outlet of above-mentioned coagulating sedimentation system is connected with filtering system by high-pressure pump, by high-pressure pump the water outlet of coagulating sedimentation system is input in the filtering system, filtering system generally adopts two-stage filtration, primary filter is the filtration with manganese sand device, and being provided with in this filtration with manganese sand device with mass concentration is the modification manganese sand filtering material of 1～7% potassium permanganate solution modification; And secondary filter adopts the fine sand strainer, artificial filler is set as filtering filtrate in the fine sand strainer.
The water outlet of the fine sand strainer of filtering system is connected with reverse osmosis system by high-pressure pump, reverse osmosis system is formed by connecting by security personnel's strainer and reverse osmosis membrane apparatus, be provided with reverse osmosis membrane assembly in the described reverse osmosis membrane apparatus, the water outlet of reverse osmosis membrane apparatus links to each other with sterilisation system;
And sterilisation system comprises: sterilization pool, on sterilization pool, be provided with chlorinating equipment, and in sterilization pool, add liquid chlorine by chlorinating equipment as sterilizing agent and oxygenant, discharge by the water outlet of sterilization pool as reuse water with the water after the liquid chlorine sterilization.
On the basis of said system, in the previous stage of neutralized system radical sedimentation basin can also be set, the water outlet of radical sedimentation basin is connected with the water-in of neutralized system, with the water-in of this radical sedimentation basin as the water-in of introducing pit water.When bring down stocks the down-hole, concentration of suspension increases severely in the pit water, can make the high concentration pulverized coal solids precipitation prevent from follow-up pipeline is resulted in blockage by this radical sedimentation basin, and alleviate the load of follow-up equipment, prevent settling region (generally the adopting the labyrinth type inclined-plate clarifying basin) avalanche of coagulating sedimentation system, the effluent quality that radical sedimentation basin also can improve subsequent technique is set simultaneously.
This radical sedimentation basin bottom is provided with mud collection tube and shore pipe for storage mud district, bottom, storage mud district, and described mud collection tube links to each other with described shore pipe, and described shore pipe links to each other with concentration basin; The supernatant liquor of radical sedimentation basin is drained into water outlet by Cipolletti weir and collects canal, and water outlet is collected the canal bottom and is provided with water outlet, and water outlet links to each other with neutralized system by pipeline.
In the above-mentioned treatment system back-purge system can also be set, constitute by back flushing tank and a plurality of backwashing pump; The water-in of back flushing tank is connected with the good water feed water inlet of sterilisation system, and the water outlet of back flushing tank is connected with filtering system and reverse osmosis system by a plurality of backwashing pumps respectively.Be that back flushing tank is passed through filtration with manganese sand device and the back flushing of fine sand strainer that backwashing pump (being generally high-pressure pump) is respectively filtering system, the reverse osmosis membrane assembly that reaches to the reverse osmosis unit in the reverse osmosis system carries out back flushing.
On the neutralized system in the above-mentioned acid mine water treatment system neutralizing agent adding apparatus can also be set, this neutralizing agent adding apparatus is arranged on neutralizing agent and adds on the mouth, add mouth input light-burning magnesium powder solution in neutralization tank by neutralizing agent, described light-burning magnesium powder solution can be that 20～30% light-burning magnesium powder is formulated by content of magnesia, generally can adopt the mine tailing light-burning magnesium powder in being produced by magnesite water-soluble formulated.
Above-mentioned acid mine water treatment system can also comprise: sludge treating system, and described sludge treating system comprises: sludge thickener and sludge dehydration device; Wherein, sludge thickener is communicated with the neutralization tank of radical sedimentation basin, neutralized system and the shore pipe of coagulating sedimentation system respectively, in the sludge thickener mud by sludge pumping to sludge dehydration device, sewage backflow carries out cycling and reutilization by neutralized system in the supernatant liquor of sludge thickener and the sludge dehydration device to neutralized system.
In the treatment system of present embodiment, two-stage stirring area and one-level zone of transition are set in the coagulating sedimentation system, promptly mixing zone, reaction zone and zone of transition are controlled at 30～500S with mix stages G value
-1, step of reaction G value is controlled at 5～10S
-1Its stirring intensity is far below the stirring intensity of recommending in the present design manual, the first step stirs and can make coagulating agent and pulverized coal particle thorough mixing and take off steady, the second stage is stirred at a slow speed to make and is taken off steady coal dust colloid thorough mixing formation flco, zone of transition can make takes off the further slaking of flco that steady back forms, and effectively raises the lightweight coal dust effect of settling of pit water middle and high concentration; It is 1～7% KMnO that this system adopts in the filtration with manganese sand device with mass concentration
4The manganese sand filtering material of solution modification, this filtrate has higher specific surface area than conventional manganese sand filtering material, can remove the ferromanganese ion in the water efficiently; This system front end is provided with radial-flow sedimentation tank, can effectively prevent the inclined-plate clarifying basin avalanche accident that concentration of suspension increased severely and causes when brought down stocks the down-hole; Above technology can be handled high turbidity, high ferrimanganic, high salinity acid mine water cost-effectively, avoided existing Generic Processing System fluctuation of service, processing costs height, water outlet usually can't be up to standard, go out environmental pollution by water etc. problem.
Below in conjunction with Fig. 1 above-mentioned acid mine water treatment system is further described in detail.
As shown in Figure 1, this acid mine water treatment system is made of radical sedimentation basin 1, neutralized system 3, coagulating sedimentation system 5, filtration with manganese sand device 7, fine sand strainer 8, security personnel's strainer 10, reverse osmosis system 11 and sterilisation system 14.
The former water A of acid mine water enters radical sedimentation basin 1 by the water-in 19 of radical sedimentation basin 1, and this radical sedimentation basin 1 had both play regulates water quality and water yield effect, plays precipitating action again.Suspended substances such as the ground particle in the former water of pit water, coal dust are through post precipitation, and water outlet enters the collection canal 20 of this radical sedimentation basin 1 by effluent weir, and the radical sedimentation basin water outlet through collecting canal 20 bottoms 21 flows out then.Concentration of suspension changes (10-1000mg/L) greatly in the pit water, when especially bring down stocks the down-hole, concentration of suspension increases severely, even up to several ten thousand mg/L, this radical sedimentation basin 1 makes the high concentration pulverized coal solids precipitation and prevents follow-up line clogging and as the inclined-plate clarifying basin avalanche of the settling region of coagulating sedimentation system, can improve simultaneously the effluent quality of subsequent technique, use this radical sedimentation basin, can reduce recurrent fault when utilizing this mine water treatment system to handle, avoid the inefficacy of follow-up equipment.Radical sedimentation basin 1 bottom enters sludge thickener 15 for storage mud district 22, the mud in the storage mud district 22 by pipeline;
The water outlet of radical sedimentation basin 1 flows into neutralized system 3 through neutralized system water-in 23, passes through neutralization tank 24 and aeration tank 30 successively, the H in neutralization tank 24 in the pit water
+The OH that is provided by light-burning magnesium powder solution
-Neutralization.Light-burning magnesium powder solution is from neutralizing agent configuration case 2 (as the neutralizing agent adding apparatus), the neutralizing agent that neutralizing agent configuration case 2 is arranged on neutralized system 3 adds on the mouth 25, add mouthful 25 inputs by neutralizing agent, by volume pump 26, pH value on-Line Monitor Device 27 and controlling box 28 common control dosages, and by agitator 29 realization neutralizing agent and acid mine water thorough mixing.The supernatant liquor of neutralization tank 24 is crossed dividing plate and is flowed into aeration tank 30, blasts air by gas blower 4, with the Fe in the pit water
2+Be oxidized to Fe
3+, the water outlet of neutralized system 3 is flowed out by neutralized system water outlet 31.As the light-burning magnesium powder solution of neutralizing agent, the mine tailing light-burning magnesium powder in can being produced by magnesite is water-soluble formulated, has low price, shock-absorbing capacity is good, be easy to the advantage controlled in the treating processes, the precipitation of formation is closely knit, can not make water outlet become muddy because of the stirring of water.Aerating oxygen in the treating processes can become ferric iron with oxidation of divalent, reduces the solubleness of iron ion in water, improves the effect of precipitation deironing.
The water outlet of neutralized system 3 flows into coagulating sedimentation system 5 through coagulating sedimentation system water-in 32, pit water in coagulating sedimentation system 5 successively through mixing zone 33, reaction zone 34, zone of transition 35 and settling region 36, water outlet enters coagulating sedimentation systematic collection canal 37 by effluent weir, and the coagulating sedimentation system water outlet through collecting canal 37 bottoms 38 flows out then.The current of mixing zone 33 are crossed dividing plate and are flowed into reaction zone 34 from the top, and the current of reaction zone 34 are crossed dividing plate and flowed into zone of transition 35 from the top, and zone of transition 35 water flow into settling region 36 from the bottom; Mixing zone 33 and reaction zone 34 are equipped with agitator 37, and the agitator 37 of mixing zone 33 is located at the middle part in pond, and the agitator 37 of reaction zone 34 is located at the bottom, pond; The mixing zone is controlled at 30～500S in the G of mix stages value
-1Reaction zone is controlled at 5～10S in the G of step of reaction value
-1The G value that this G value is recommended in the existing technical manual.Suspended substance in the pit water mainly is made up of light-weight coal dust, rock dust and partial organic substances, compares suspended substance in underground water/surface water, and density is littler, and negative charge is stronger, adopts the G value of recommending in the present handbook can't obtain satisfied coagulating sedimentation effect at all.
The water outlet of coagulating sedimentation system 5 pumps into filtration with manganese sand device 7 by high-pressure pump 6a by filtration with manganese sand device water-in 38 and carries out deferrization and demanganization, pit water behind the deferrization and demanganization flows out from filtration with manganese sand device water outlet 39, flow into fine sand strainer 8 through fine sand strainer water-in 40, the water outlet after the filtration is flowed out from fine sand strainer water outlet 41.Pit water since funneling effect, ground and water mutual effect make iron manganese content far above underground water iron manganese content in the surface water, iron level often reaches hundreds of mg/L, manganese content often reaches tens mg/L, and the pH value of pit water is lower, ferrous iron, manganese are difficult to oxidation, the filtrate ripening stage long (1-2 month) when adopting filtration with manganese sand to remove, the frequent severe overweight of water outlet manganese content.Employing is 1～7% KMnO with mass concentration in the filtration with manganese sand device 7
4The manganese sand filtering material of solution modification, this filtrate has higher specific surface area than conventional manganese sand filtering material, the ripening stage of manganese sand filtering material can be shortened to 1～2 day by 1～2 month, and can greatly improve effluent quality.Filtration with manganese sand device 7 is all established with the backwash system with fine sand strainer 8 and is connected, and cooperates the supply backwashing water to carry out back flushing with backwashing pump 17a, 17b by the backwash water tank 9 of backwash system.
The water outlet of fine sand strainer 8 pumps into security personnel's strainer 10 by another high-pressure pump 6b by security personnel's strainer water-in 42, flow out from security personnel's strainer water outlet 43, flow into reverse osmosis system 11 by reverse osmosis system water-in 44, various ions, organism, micronic dust thing, bacterium, colloid etc. nearly all are trapped in reverse osmosis system 11, and the water outlet of reverse osmosis system 11 is flowed out by reverse osmosis water outlet 45.Reverse osmosis membrane assembly in the reverse osmosis system 11 can require to adopt domestic and international sophisticated membrane module to be configured according to pit water character and water outlet, reverse osmosis system 11 is connected with the backwash system, supplies backwashing waters by the backwash water tank 9 of backwash system with backwashing pump 12 and carries out back flushing.
The water outlet of reverse osmosis system 11 enters the sterilization pool 47 of sterilisation system 14 from sterilization pool water-in 46, sterilization pool 47 is provided with chlorinating equipment 13 (can adopt the chlorine machine of throwing), be used in sterilization pool 47, adding liquid chlorine as sterilizing agent, the water outlet of sterilization pool 47 is flowed out by sterilization pool water outlet 48, and the clean water basin that this water outlet enters the system back promptly can be used as the water reuse.
In the above-mentioned treatment system, the neutralization tank 24 of neutralized system 3 and the bottom of aeration tank 30 are equipped with sludge bucket 49, mud in the sludge bucket 49 enters sludge thickener 15 by pipeline, the mixing zone 33 of coagulating sedimentation system 5, reaction zone 34, zone of transition 35 and 36 bottoms, sloping plate deposition district are equipped with sludge bucket, mud in the sludge bucket also enters sludge thickener 15 by pipeline, and the mud in the sludge thickener 15 is delivered to sludge dehydration device 16 through sludge pump 50 and dewatered.The sewage employing sump pump 51 of sludge dehydration device 16 is back to coagulating sedimentation system 5 front end pipelines and carries out circular treatment, the mud outward transport after the dehydration; Simultaneously the supernatant liquor of sludge thickener 15 also adopts sump pump 51 to be back to coagulating sedimentation system 5 front end pipelines to carry out circular treatment.
Mine water treatment system in the embodiment of the invention is particularly useful for the acid mine water of high turbidity, high ferrimanganic, high salinity to be handled, and the water quality of handling the back water outlet can be used for industrial reuse and additional mining area domestic water.Have the following advantages compared to existing technology and positive effect:
(1) is provided with radical sedimentation basin foremost in technology, when mine is brought down stocks, radical sedimentation basin plays precipitation pulverized coal particle effect, and the suspended substance blocking pipeline of high density and the pressure inclined-plate clarifying basin that collapses has guaranteed safely and steadily running of total system when preventing to bring down stocks;
What (2) utilize in the selection of neutralizing agent is the useless mine tailing light-burning magnesium powder that abandons in the magnesite production process, the shock-absorbing capacity of light-burning magnesium powder is good, add dose by control easily and regulate the pH value of handling water sample, dosing is easily excessive when having overcome calcium oxide as neutralizing agent, the uppity shortcoming of water sample pH value.While directly adds when light-burning magnesium powder is handled acid mine water and gets final product, and need not join breast before adding, and its corrodibility is less than calcium oxide.Utilize the small and dense reality of precipitation that produces with acid mine water in the light-burning magnesium powder, precipitation capacity and throw out volume are all littler than the calcium oxide, and character is more stable, and sludge quantity reduces.Utilize light-burning magnesium powder also to realize the purpose of waste recycling, saved the cost that pit water is handled as neutralizing agent;
(3) settling tank adopts mixing zone, the isolating mode of reaction zone, and the G value of mix stages is controlled at 30～500S
-1, the G value of step of reaction is controlled at 5～10S
-1, the G value scope that provides in the existing relevant Specialty Design handbook all is provided.So just avoided because the excessive loose frangible shortcoming of the alumen ustum that forms in the coagulation process that causes of hydraulic gradient.Thereby when handling pit water, overcome this shortcoming and reached good flocculation sediment effect.
4) employing of filtration with manganese sand device is 1～7%KMnO through mass concentration
4The manganese sand filtering material of solution modification, this modified filter material shortened to 1～3 day with the ripening stage of traditional filtrate by 1～2 month.
The water treatment system that the embodiment of the invention provides undergoes technological transformation to the colliery acid mine water, eliminates old milk of lime and adds the system that technology is carried out ore deposit water inlet processing, has important environmental value and remarkable economical, social benefit.The water quality that native system is handled the back water outlet can satisfy the requirement of water of productive use such as fully-mechanized mining equipment emulsion preparation water, downhole electrical motor cooling, the dustproof watering in down-hole and equipment washing and even domestic water.Realize the reuse of acid mine water, alleviated the pressure of mining area water
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (10)
1. acid mine water treatment system, it is characterized in that: this system is formed by connecting in turn by neutralized system, coagulating sedimentation system, filtering system, reverse osmosis system and sterilisation system, wherein, the water-in of described neutralized system is as the water-in of introducing the acid mine water of handling, and the water outlet of described sterilisation system is as the clear water relief outlet after handling;
Described coagulating sedimentation system comprises mixing zone, reaction zone, zone of transition and settling region, and described mixing zone is communicated with successively with reaction zone, zone of transition and settling region; The water-in of described mixing zone is communicated with the water outlet of described neutralized system; The water outlet of described settling region is communicated with the water-in of described filtering system;
Described filtering system comprises the filtration with manganese sand device, and being provided with in the described filtration with manganese sand device with mass concentration is the modification manganese sand filtering material of 1～7% potassium permanganate solution modification.
2. acid mine water treatment system according to claim 1 is characterized in that: described system also comprises:
Radical sedimentation basin, described radical sedimentation basin is arranged on the previous stage of described neutralized system, and the water outlet of described radical sedimentation basin is connected with the water-in of neutralized system, and the water-in of described radical sedimentation basin is as the water-in of introducing pit water.
3. acid mine water treatment system according to claim 1, it is characterized in that: the whole reaction tank of described coagulating sedimentation system's employing, divide in the described reaction tank and be separated with four lattice that link to each other successively, first lattice are the mixing zone, second lattice are reaction zone, the 3rd lattice are zone of transition, and the 4th lattice are the settling region; Be equipped with agitator in described mixing zone and the reaction zone, the agitator of described mixing zone is located at the middle part in the mixing zone, and the agitator of described reaction zone is located at the bottom in the reaction zone; The bottom of described mixing zone, reaction zone, zone of transition and settling region also is provided with sludge bucket.
4. acid mine water treatment system according to claim 3 is characterized in that: the G value regulation range of the agitator of described mixing zone is 30～500S
-1The G value regulation range of the agitator of described reaction zone is 5～10S
-1
5. according to claim 1 or 3 described acid mine water treatment systems, it is characterized in that: the settling region of described coagulating sedimentation system adopts the labyrinth inclined-plate clarifying basin, the swash plate that swash plate adopts the non-toxic polyvinyl chloride material to make, and swash plate is provided with fin.
6. acid mine water treatment system according to claim 1 is characterized in that: be separated into two lattice that closely link to each other in the described neutralized system, first lattice are neutralization tank, and second lattice are the aeration tank; Described neutralization tank is provided with water-in and adds the neutralizing agent interpolation mouth of light-burning magnesium powder solution neutralizing agent, is provided with whipping appts in the neutralization tank; The water-in of described neutralization tank is as the neutralized system water-in, and the pit water in the neutralization tank flows into the aeration tank by the dividing plate between neutralization tank and the aeration tank; Described aeration tank water outlet is as the water outlet of neutralized system;
Bottom, described aeration tank is provided with microporous aeration device and gas blower.
7. acid mine water treatment system according to claim 6 is characterized in that: described neutralization tank and bottom, aeration tank also are provided with sludge bucket.
8. acid mine water treatment system according to claim 6, it is characterized in that: described neutralized system also comprises: the neutralizing agent adding apparatus, the neutralizing agent that is arranged on described neutralized system adds on the mouth, be provided with the light-burning magnesium powder solution as neutralizing agent in the described neutralizing agent adding apparatus, described light-burning magnesium powder solution is that 20～30% light-burning magnesium powder is formulated by content of magnesia;
Described filtering system also comprises the fine sand strainer, and described fine sand strainer is connected as secondary filter after the described filtration with manganese sand device, is provided with artificial filler in the described fine sand strainer.
9. acid mine water treatment system according to claim 1, it is characterized in that: described reverse osmosis system comprises: security personnel's strainer and reverse osmosis membrane apparatus, be provided with reverse osmosis membrane assembly in the described reverse osmosis membrane apparatus, security personnel's strainer is communicated with described reverse osmosis membrane apparatus, and the water outlet of reverse osmosis membrane apparatus links to each other with sterilisation system;
Described sterilisation system comprises: sterilization pool is provided with the chlorinating equipment of adding as the liquid chlorine of sterilizing agent and oxygenant on described sterilization pool.
10. acid mine water treatment system according to claim 1 is characterized in that: described system also comprises: back-purge system is made of back flushing tank and backwashing pump; The water-in of back flushing tank is connected with the good water feed water inlet of sterilisation system, and the water outlet of back flushing tank is connected with filtering system and reverse osmosis system by a plurality of backwashing pumps respectively.
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Application publication date: 20100915 |