CN209065615U - It is a kind of for removing the processing system of heavy metal in percolate - Google Patents
It is a kind of for removing the processing system of heavy metal in percolate Download PDFInfo
- Publication number
- CN209065615U CN209065615U CN201821874626.5U CN201821874626U CN209065615U CN 209065615 U CN209065615 U CN 209065615U CN 201821874626 U CN201821874626 U CN 201821874626U CN 209065615 U CN209065615 U CN 209065615U
- Authority
- CN
- China
- Prior art keywords
- zero
- valent iron
- supporting layer
- water inlet
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Removal Of Specific Substances (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
It is a kind of for removing the processing system of heavy metal in percolate, be related to a kind of for removing the processing system of heavy metal in percolate.Purpose is to solve the problems, such as that Zero-valent Iron reactivity reduces and hardened filtrate, short stream and loss easily occur for Zero-valent Iron.The processing system that the utility model is used to remove heavy metal in percolate is made of collecting-tank, pretreatment system, upward flow Zero-valent Iron filtration reactor, static mixer, manganese sand filter and reuse water system.Upward flow Zero-valent Iron filtration reactor can be avoided filtrate plate, the short stream of knot and leakage；Pretreatment system can reduce the concentration of the suspended solid into sewage and then reduce head loss；Reuse water system has the function of backwashing function and pickling, and pickling can restore and restore the adsorption capacity of filtrate, and backwash can reduce head resistance；Utility model device can handle various heavy and organic pollutant simultaneously, and water pollutant reaches trace concentration hereinafter, at low cost out.The utility model is suitable for percolate sewage treatment.
Description
Technical field
The utility model belongs to technical field of water treatment equipment, and in particular to a kind of percolate sewage disposal system.
Background technique
Percolate sewage includes the percolate for smelting the generation of slag landfill yard, smelts the rainwater infiltration that slag air storage generates
The percolate that filtrate and the dehydration of solid waste containing heavy metal generate；Organic dirt in percolate sewage containing heavy metal and oxidisability
Object etc. is contaminated, heavy metal includes As, Cd, Cr, Pb, Cu, Zn, Se, Hg etc.；The organic pollutant of oxidisability includes nitrobenzene, chloro
Organic matter, fluoride etc.；Since this kind of micro and trace concentration pollutant has the characteristics that cumulative bad and persistence, in environment
In be not easy to be degraded, be easily bioaccumulation.Contaminants drinking water source or entrance potable water system will seriously threaten the mankind and be good for
Health and ecological environment security.On the other hand, contaminating enterprises to the sewage of discharge need to handle it is up to standard after can just be discharged into water body
In, the raising of the requirement with country to discharge standard, the removal of micro and trace concentration pollutant is increasingly becoming pollution row
The technical bottleneck of the person's of putting promotion discharge standard.For example, urban wastewater treatment firm pollutant emission standard (standard No. GB18918-
2002) characterizing portion a class of pollutant highest allows concentration of emission limit value that need to be less than 1mg/L, be even less than 1 μ g/L's in
Rank or the water outlet requirement that must not be detected, such as total mercury need to be lower than 1 μ g/L, and alkyl mercury must not detect, and total cadmium need to be lower than 0.01mg/
L, total chromium need to be lower than 0.1mg/L, and Cr VI need to be lower than 0.05mg/L, and total arsenic need to be lower than 0.1mg/L, and total lead need to be lower than 0.1mg/L；
In selection item controlled, the concentration of emission of chloroform need to be lower than 0.3mg/L, and the concentration of emission of carbon tetrachloride need to be lower than
0.03mg/L.For blowdown enterprise, higher emission request need to be reached, i.e., need to meet receiving water body in surface water environment quality mark
Classification standard in quasi- (standard No. GB3838-2002), wherein total mercury need to be lower than 0.05 μ g/L (I/II class water) or need to be lower than
0.1 μ g/L (III/IV class water), total cadmium need to be lower than 0.001mg/L (I class water) or need to be lower than 0.005mg/L (II/III/IV class
Water), Cr VI need to be lower than 0.01mg/L (I class water) or need to be lower than 0.05mg/L (II/III/IV class water), and total arsenic need to be lower than
0.05mg/L (I/II/III class water) need to be lower than 0.1mg/L (IV/V class water), and total lead need to be lower than 0.01mg/L (I/II class water)
Or 0.05mg/L (III/IV class water) need to be lower than.As country improves blowdown enterprise to the emission request of different receiving water bodies,
The technology for finding a kind of removal requirement for being able to satisfy micro and trace concentration pollutant again of low cost has become sewage treatment
Facility proposes the technical bottleneck of mark transformation.Conventional heavy metal pollution water treatment technology more has the removal of high density pollution object excellent
Gesture, such as electric flocculation technique, coagulation-settlement process etc., have many successful stories, but electric flocculation technique, coagulating sedimentation work
Skill etc. needs to increase reaction by way of increasing energy consumption and increasing added amount of chemical dynamic when handling micro and trace concentration
Power causes cost of sewage disposal to increase at series.Entering water heavy metal concentration 102~103When in the range of mg/L, pass through biography
Unite technique processing can be stable the removal rate for reaching 99.9%, so that pollutant concentration is reached 100~101Mg/L magnitude, and
Keep lower operating cost.However when pollutant concentration continues from 100~101Mg/L is reduced to 10-2~10-3Mg/L is even more
It is low, as mercury water outlet need to be lower than 0.05 μ g/L (5x10-5Mg/L), then need persistently to add excessive medicament, increase current strength, or
Hydraulic detention time is improved, therefore causes increasing substantially for processing cost.
Micro or trace concentration water outlet can effectively be reached using ion exchange and biosorption technology, but in reality
In the operation of border, since there is very strong selectivity often can guarantee when handling Single Pollution object for absorption resin and biological adsorption
Higher removal effect, but when being coexisted in water there are many heavy metal contaminants the case where, such as when zwitterion coexists, from
Son exchange and biosorption technology it is difficult to ensure that handle the heavy metal ion coexisted simultaneously.In addition, ion exchange and biological adsorption
In the process of running, redox or complex reaction do not occur for technology, and generated waste residue is needed according at danger wastes
Requirement disposition is set, whole operating cost is improved.
Zero-valent Iron (ZVI) has many advantages, such as that hypotoxicity, environmental-friendly, cheap, easy to operate, green is without secondary pollution,
One of the important technology for having become polluted water body reparation, it is dirty in processing nitrogen dye wastewater, chlorinatedorganic sewage, nitrate
It is standby in terms of the waste water controls such as water, perchlorate, herbicide, heavy metal containing sewage to have wide application prospect.ZVI comes from manufacture craft
Classification mainly includes common grinding iron powder, nanometer iron powder, iron sponge powder and water mist iron powder.ZVI particle can restore, adsorb and
The harmful substances such as precipitating removal multi-metal.The mechanism of Zero-valent Iron removal pollutant is divided into: (1) reduction of iron: iron is living
Metal is sprinkled, has stronger reproducibility to heavy metal contaminants, various heavy can be reduced into the valence of zero-valent state or hypotoxicity
State reaches processing intent.(2) light electrolysis acts on: Zero-valent Iron has electrochemical properties, generate in electrode reaction nascent state [H] and
Fe2+Redox can occur with many components in sewage to restore many contaminant degradations.(3) coagulation-co-precipitation is made
With: iron can generate unformed iron hydroxide, cotton-shaped Fe (OH) in corrosion process2With Fe (OH)3Isoreactivity ferrous components, they
With it is very strong adsorb, flocculate, cohere, surface complexing, chelating, build bridge, volume is swept, interface oxidation and co-precipitation ability, whereby may be used
Heavy metal Gu liquid circle Mian gan is controlled to move.(4) absorption-enrichment-co-precipitation: using at iron powder, nanometer iron powder and iron sponge powder
It, can be by micro and trace since iron powder surface has the strong characterization of adsorption of bigger serface when managing heavy metal contaminants in water
Concentration enriching pollutants form co-precipitate in the surface void of iron powder, then through reduction.
ZVI goes heavy metal research in water removal to have certain basis, but there is also problems for practical application.From application
Mode is classified, and adding of agent mode and media filtration mode are broadly divided into.Directly using nanometer ZVI or micron-sized ZVI as medicine
Agent is added in sewage, and the pollutant in water can be effectively treated, however during adding, ZVI easily with the oxygen in air
Dissolved oxygen in molecule and water reacts, the iron oxygen passivation layer of one layer of 1~4nm densification of Surface Creation, leads to corrosion slowly, instead
Answer active reduction.ZVI kernel is wrapped up by ferriferous oxide and separates further corrosion and the contact with pollutant, leads to whole work
Property it is low, efficiency decline.In order to overcome ZVI surface passivation, academia and engineering circles have carried out many trials, including preparation nanometer zero
Valence iron (nZVI), bimetallic system oxide, additional low-intensity magnetic field, ultrasonic wave synergistic reaction, loaded nano Zero-valent Iron, a hydridization huge sum of money
It is molten etc. to belong to ion (palladium, nickel), acid.Above-mentioned improvement can improve ZVI activity and enhancing removal efficiency of heavy metals to a certain extent, but all
In the presence of such as cost is excessively high, engineering construction is difficult, brings secondary pollution problems, such as patent CN106477689A,
CN203256019, CN103332823, CN104326595, CN105776491, CN102807272, CN102583689,
CN103112918 and CN103342410.Use ZVI that can prevent contact of the ZVI with air as filtrate, prevents it direct
Oxidation, while reducing the investment of medicine system and cooperative system.However, general filter type be it is lower to flow through filter, due to
ZVI grain diameter very little (partial size usually nm~μm between), lower to when flowing through filter running, filtrate frequent occurrence
The problem of hardened, short stream and loss, influence outlet effect.The either application of ZVI adding of agent formula or lower filter to stream ZVI is answered
With, in known application case, the first use of ZVI is only accounted for, it will by way of spoil disposal and replacement filtrate after use
ZVI is abandoned, therefore only the ZVI of surface portion is contaminated object oxidation or forms the oxide of iron, and is still had inside ZVI a large amount of
The good Zero-valent Iron for having neither part nor lot in reaction is not used, and is resulted in waste of resources.
Utility model content
The utility model is in order to solve the iron oxygen of surface densification easily generated during existing Zero-valent Iron processing percolate sewage
Passivation layer causes reactivity to reduce and the problem of hardened filtrate, short stream easily occurs and is lost for Zero-valent Iron, proposes a kind of to be used to go
Except the processing system of heavy metal in percolate.
The utility model is used to remove the processing system of heavy metal in percolate by collecting-tank, pretreatment system, upward flow
Zero-valent Iron filtration reactor, static mixer, manganese sand filter and reuse water system are constituted；
The upward flow Zero-valent Iron filtration reactor is made of reactor body and regulating system；
The regulating system is by adjusting tank, the 2nd pH transmitter, blender, stirring slurry, the 2nd pH electrode, the second dosing
Pump, the second medicine storing pot and third medicine storing pot are constituted；2nd pH transmitter, blender, stirring slurry and the setting of the 2nd pH electrode are being adjusted
It saves inside tank, the second medicine storing pot and the setting of third medicine storing pot are being adjusted outside tank, on the second medicine storing pot and third medicine storing pot respectively
It is provided with drug output branch pipe, is provided with valve, the second storage on the drug output branch pipe on the second medicine storing pot and third medicine storing pot
Drug output branch pipe on medicinal cupping and third medicine storing pot is connected to drug delivery trunk respectively, and drug delivery trunk and adjusting tank connect
It is logical, the second dosing pump is provided on drug delivery trunk；It adjusts tank top and is provided with water inlet pipe, adjust pot bottom and be provided with draining
It manages, is provided with valve on drainpipe；The signal output end of 2nd pH electrode and the control signal input of the 2nd pH transmitter are logical
Signal wire connection is crossed, the control signal output of the 2nd pH transmitter and the control signal input of the second dosing pump pass through signal
Line connection；
The reactor body be containment cylinder tank or closed cuboid pond, the bottom of reactor body be provided with into
Water pipe, the top of reactor body are provided with drainpipe and backwash drainpipe, are provided with intake pump on water inlet pipe；Reactor master
Internal portion is from top to bottom disposed with Zero-valent Iron filter material layer, the first supporting layer, the second supporting layer, third supporting layer and the 4th and holds
Hold in the palm layer；The Zero-valent Iron filter material layer is made of zeroth order iron powder；The effective grain size d10 of zeroth order iron powder in Zero-valent Iron filter material layer is
250 μm, nonuniformity coefficient k80 is less than 1.5, iron content >=96%；Zero-valent Iron filter material layer with a thickness of 0.5~1.5m；Described
Supporting layer filtrate is filled in one supporting layer, the second supporting layer, third supporting layer and the 4th supporting layer；In first supporting layer
Supporting layer filtrate be with zeroth order iron powder identical in Zero-valent Iron filter material layer or with the Zero-valent Iron powder density in Zero-valent Iron filter material layer
Identical quartz sand；The partial size of supporting layer filtrate is 0.8~2mm, 40~100mm of thickness in first supporting layer；Described second holds
Hold in the palm layer in supporting layer filtrate be with zeroth order iron powder identical in Zero-valent Iron filter material layer or with the Zero-valent Iron in Zero-valent Iron filter material layer
The identical quartz sand of powder density；The partial size of supporting layer filtrate is 2~4mm, 40~100mm of thickness in second supporting layer；Described
Supporting layer filtrate in three supporting layers be with zeroth order iron powder identical in Zero-valent Iron filter material layer or with zero in Zero-valent Iron filter material layer
The identical quartz sand of valence iron powder density；The partial size of supporting layer filtrate is 4~8mm, 40~100mm of thickness in third supporting layer；Institute
State supporting layer filtrate in the 4th supporting layer be with zeroth order iron powder identical in Zero-valent Iron filter material layer or in Zero-valent Iron filter material layer
The identical quartz sand of Zero-valent Iron powder density；In 4th supporting layer the partial size of supporting layer filtrate be 8~16mm, thickness 40~
100mm；4th supporting layer bottom is provided with big resistance cloth water assembly；Zero-valent Iron filter material layer lower part is provided with slight drag water distribution group
Part；The water inlet end of big resistance cloth water assembly is connected to water inlet pipe water outlet；The water inlet pipe of slight drag cloth water assembly is leant out to reaction
Device bottom part body is provided with valve on the water inlet pipe of the slight drag cloth water assembly outside reactor body；It is adjusted in regulating system
The drainpipe of pot bottom setting is connected to the water inlet for the water inlet pipe that reactor body bottom is arranged；The big resistance cloth water assembly
For strainer head；The slight drag cloth water assembly is perforated pipe；
Hydraulic loading is 4~30m when upward flow Zero-valent Iron filtration reactor is run3/h/m2；Air-land combat be 4~
30min；
The pretreatment system is made of pretreatment unit, sedimentation basin, sludge reservoir, plate and frame filter press；Pretreatment unit
Water outlet be connected to the water inlet of sedimentation basin by pipeline, the sludge import of the sludge outlet of sedimentation basin and sludge reservoir is logical
Piping is connected to, and is provided with dredge pump, the sludge outlet and sheet frame of sludge reservoir on the pipeline between sedimentation basin and sludge reservoir
The sludge import of filter press is connected to by pipeline, is provided with sludge pump, plate on the pipeline between sludge reservoir and plate and frame filter press
The percolate of frame filter press exports and the supernatant outlet of sludge reservoir is connected with the recycling water inlet of collecting-tank by pipeline respectively
It is logical；The pretreatment unit is coagulative precipitation device, electric flocculation device, coagulating basin, absorption resin filtering device or sand filtering device；
The reuse water system is added by reverse washing tank, the first pH transmitter, blender, stirring slurry, the first pH electrode, first
Teat pipette and the first medicine storing pot are constituted；First pH transmitter, blender, stirring slurry and the first pH electrode are arranged in reverse washing tank
Portion, the first medicine storing pot are arranged outside reverse washing tank；Reverse washing tank bottom is provided with drain pipe and backwash tube, on backwash tube
It is provided with valve and delivery pump；First medicine storing pot is connected to reverse washing tank by pipeline, and the first dosing pump is arranged in the first drug storage
Pipeline between tank and reverse washing tank connects；The signal output end of first pH electrode and the control signal of the first pH transmitter input
End is connected to by signal wire, and the control signal output of the first pH transmitter and the control signal input of the first dosing pump pass through
Signal wire connection；
The water outlet of the collecting-tank is connected to the water inlet of pretreatment unit in pretreatment system by pipeline, pretreatment
The water inlet of the outfall of sedimentation basin and the bottom setting of reactor body in upward flow Zero-valent Iron filtration reactor in system
Pipe is connected to, the water inlet of the drainpipe and static mixer of the top setting of reactor body in upward flow Zero-valent Iron filtration reactor
Mouth connection, the water outlet of static mixer are connected to the water inlet of manganese sand filter by pipeline, the water outlet of manganese sand filter
It is connected to the water inlet of reuse pool by pipeline；Manganese sand filter bottom is provided with backwash water inlet pipe, in manganese sand filter
Portion is provided with backwash drainpipe；In reuse water system reverse washing tank bottom be arranged backwash tube respectively with manganese sand filter
The water inlet pipe for backwashing the slight drag cloth water assembly in water inlet pipe and upward flow Zero-valent Iron filtration reactor in reactor body is logical
Piping connection；The backwash drainpipe of manganese sand filter top setting and the backwash drainpipe of reactor body top setting
It is connected to respectively with the recycling water inlet of collecting-tank by pipeline；
The reactor body material is glass reinforced plastic, aluminium alloy, cast iron, carbon steel, stainless steel, plastics or armored concrete；
The aluminium alloy, cast iron, carbon steel, stainless steel material reactor body the inner surface and the outer surface be coated with erosion resistant coating；Anti-corrosion
The material of layer material is raw lacquer, cashew resin, phenolic resin coating, epoxy-phenolic paint, epoxy coating, chlorinated polyvinyl chloride paints, drip
Blueness, furane resins, polyurethanes, inorganic zinc rich paint etc.；
In the utility model, big resistance cloth water assembly in upward flow Zero-valent Iron filtration reactor in reactor body into
Water end (W.E.) is connected to water inlet pipe intakes for reactor body；The water inlet pipe of slight drag cloth water assembly in reactor body and reuse
The backwash tube of water system bottom setting is connected to the backwash for answering device main body；Regulating system has the function of vulcanization and pH value tune
Function is saved, the second medicine storing pot and third medicine storing pot are respectively used to the dissolvable sulfide and acid solution of storage high concentration；PH value is
4~6 be the pH value most preferably reacted, and the 2nd pH transmitter is set as 4~6, when the 2nd pH electrode detection to adjust tank in sewage
PH not in 4~6 ranges when, the 2nd pH transmitter control the second dosing pump to adjust tank input acid solution to save tank in sewage
PH be 4~6；Dissolvable sulfide is used to adjust the S of sewage in tank2-Dissolvable sulfide is added to adjusting in the adjusting of concentration
Make the S in sewage in tank2-Concentration be 0.02~20mg/L；By the way that soluble sulphur is added in the pending water into regulating system
After compound and acid solution, reaction is entered by the drain pipe that regulating system bottom is arranged by regulating system treated pending water
Device main body, is vulcanized using regulating system, makes filtrate that sulfurization occur, and can prevent filtrate and oxygen or water effect from oxygen occurs
In filter material surface and form iron oxide passivation layer, instead formed ferrous sulfide or vulcanization iron layer, ferrous sulfide or
S in iron sulfide2-Reduction can be equally provided, and remove the heavy metal in water removal by way of precipitating；The adjusting system
The residence time of system is 15~45min；The dissolvable sulfide is dissolvable sulfide salt；Dissolvable sulfide salt is vulcanization
Calcium or vulcanized sodium；Acid solution is hydrochloric acid of the pH value between 1~5；
The concentration for the suspended solid (SS) for entering sewage is reduced to 1~100mg/L using pretreatment system by the utility model,
The head loss during subsequent filter can be reduced, energy utilization rate is improved.The coagulating sedimentation or electric flocculation of use are at low cost；
The concentration reduction of the suspended solid of sewage can protect subsequent reactor, and it is excessively high to prevent pollutant concentration, pollutant concentration
Moment is more than the filter capacity upper limit of filtrate；Pretreatment system can also remove removing heavy metals, and heavy metal concentration is reduced to ppm
Below.The reagent added in pretreatment unit is milk of lime, ferrous sulfate, CaS, Na2One of S or a variety of；Wherein, lime
Newborn main component is the Ca (OH) that CaO is dissolved in water generation2, as alkaline matter, milk of lime improves the pH of liquid phase after being added.Very
Multi-metal ion generates hydroxide precipitating under alkaline condition, such as Cu (OH)2Deng.Arsenic acid radical ion can be formed partially with Ca
Calcium arsenite Ca (AsO2) 2 is precipitated.CaS,Na2S provides soluble S2-Ion, S2-Sulfide can be formed with heavy metal cation
Precipitating, such as CuS.It is precipitated different from heavy metal hydroxide, sulfide precipitation is more stable, is not easy to dissolve out in acid condition.
Arsenic acid radical ion can be reacted with milk of lime and ferrous sulfate generates pyroarsenous acid iron precipitating；
In the utility model, the reagent added to static mixer is permanganate；The reaction of generation are as follows: 5Fe2++MnO4-
+8H+=5Fe3++Mn2++4H2O
In the utility model, reverse washing tank is used to store the sewage that processing is completed in reuse water system；Reuse water system tool
There are backwashing function and pickling function；First medicine storing pot is for storing acid solution；When zero in upward flow Zero-valent Iron filtration reactor
When valence iron filtrate gradually loses processing reducing power due to oxidation, the first dosing pump of control of the first pH transmitter is by the
It is 4~6 that acid solution in one medicine storing pot, which is input in reverse washing tank to pH in reverse washing tank,；Reuse water system is upwards to stream zeroth order
The backwashing water that input pH is 4~6 in iron filtration reactor carries out pickling, and the first pH transmitter setting value is 4 in acid cleaning process
~6；Pickling is the di-iron trioxide that the attachment of Zero-valent Iron filter material surface is dissolved in by chemical action, ferroso-ferric oxide, hydroxide
Ferrous and iron hydroxide, Zero-valent Iron is exposed again, achievees the purpose that recovery and reduction adsorption ability.Backwash is to pass through
The physical action of water flow scrubs filter material surface, by the filtrate attachment in manganese sand filter and upward flow Zero-valent Iron filtration reactor
Iron oxide passivation layer, pollutant co-precipitation residue and the heavy metal-iron complex that the hydroxide of iron, particulate matter, pickling fall off
Equal sediments are removed from filter material surface, reduce the head resistance of upward flow Zero-valent Iron filtration reactor and manganese sand filter；It utilizes
The period of recycle-water system acid-washing was 1~4 week, and the pickling time of each pickling cycle is 5~30 minutes；It is described to utilize reuse
Hydraulic loading when water system backwashes is 30~40m3/h/m2；Backwashing period is 24~72 hours, each backwashing period
Backwashing time be 5~30 minutes.
The principles of the present invention and the utility model has the advantages that
1, utility model device treatment process do not need other ancillary equipments such as electromagnetism or ultrasound can be to avoid filtrate
Hardened, short stream and loss occurs；In the utility model upward flow Zero-valent Iron filtration reactor, zeroth order iron powder filtering material particle is in weight
The suspended state of power and buoyant equilibrium, sewage, which is filled between zeroth order iron powder filtering material particle, keeps Zero-valent Iron filter material layer outstanding in expansion
Floating form, the phenomenon that having prevented hardened filtrate and short stream；Sewage is entered in reactor by reactor lower part, is arranged by reactor top
Reactor out, zeroth order iron powder filtering material particle are suspended in sewage, therefore will not sink to entering water inlet in zeroth order iron powder filtering material particle
Pipeline leaks, and will not overflow from discharge pipe line；
2, in the utility model upward flow Zero-valent Iron filtration reactor operational process, filter process only needs to intake by control
Pressure realizes two parameters of expansion rate and hydraulic detention time of filtrate entirety, i.e., up to standard required for controllable water treatment procedure
Concentration for the treatment of is horizontal, therefore easy to operate；
3, in the utility model upward flow Zero-valent Iron filtration reactor operational process, by adding soluble vulcanization into water
Object makes filtrate that sulfurization (Sulfidation) occur.Sulfurization can prevent filtrate and oxygen or water effect from oxidation occurs simultaneously
Iron oxide passivation layer is formed, replaces to form ferrous sulfide or vulcanization iron layer；The ferrous sulfide or iron sulfide of synkaingenesis state
Reduction can be equally provided, the heavy metal in water removal can be removed by way of precipitating；
4. in the utility model longtime running, cleaning the pollutant of filter material surface such as by way of backwashing and weak acid is washed
The precipitating such as iron complex, while iron oxygen passivation layer is removed, restore filtrate reducing property；Therefore filtrate has obtained pickling weight repeatedly
System improves the service life of ZVI filtrate, achievees the purpose that sufficiently to adsorb and use to greatest extent；
5, compared with conventional processing technique, utility model device can handle multiple pollutant such as As, Cd, Cr simultaneously,
Pb, Cu, Zn, Se, Hg etc. and the organic pollutant of oxidisability such as nitrobenzene, chlorinatedorganic, fluoride etc.；Processing cost
Low, water pollutant reaches trace concentration or less out；
6, in the utility model after Zero-valent Iron filtrate is by exhaustive oxidation or adsorption saturation, backwash or acid can not be passed through again
When washing recovery processing capacity again, these filtrates become discarded filtrate；The waste material and residue that utility model device generates can
By toxic leaching test, it is not belonging to danger wastes.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the utility model is used to remove the processing system of heavy metal in percolate；
Fig. 2 is that the utility model shows for removing the structure of pretreatment system 6 in the processing system of heavy metal in percolate
It is intended to；
Fig. 3 is the structural schematic diagram of upward flow Zero-valent Iron filtration reactor 2；
Fig. 4 is the schematic diagram that hardened phenomenon occurs for the existing lower ZVI into stream filter process；Arrow direction is water flow in figure
Direction；
Fig. 5 is filtrate occupied state schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 6 is filtrate suspended state schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 7 is that the sediments such as heavy metal-iron complex removed in upward flow Zero-valent Iron filtration reactor backwash process
Journey schematic diagram；
Fig. 8 is iron oxide passivation layer removal process schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 9 is the forming process schematic diagram of FeS layer or vulcanization iron layer in upward flow Zero-valent Iron filtration reactor.
Specific embodiment:
Technical solutions of the utility model are not limited to that specific embodiments lis below, and further include each specific embodiment
Between any reasonable combination.
Specific embodiment 1: illustrating present embodiment in conjunction with Fig. 1~9, present embodiment is for removing weight in percolate
The processing system of metal is by collecting-tank 5, pretreatment system 6, upward flow Zero-valent Iron filtration reactor 2, static mixer 7, manganese sand
Filter 8 and reuse water system 9 are constituted；
The upward flow Zero-valent Iron filtration reactor 2 is made of reactor body 1 and regulating system 3；
The regulating system 3 is by adjusting tank, the 2nd pH transmitter 31, blender, stirring slurry, the 2nd pH electrode 32, second
Dosing pump 33, the second medicine storing pot 34 and third medicine storing pot 35 are constituted；2nd pH transmitter 31, blender, stirring slurry and the 2nd pH
The setting of electrode 32 is being adjusted inside tank, and the second medicine storing pot 34 and the setting of third medicine storing pot 35 are being adjusted outside tank, the second medicine storing pot
34 and third medicine storing pot 35 on be respectively arranged with drug output branch pipe, the drug on the second medicine storing pot 34 and third medicine storing pot 35 is defeated
Valve is provided on branch pipe out, the drug output branch pipe on the second medicine storing pot 34 and third medicine storing pot 35 is total with drug output respectively
Pipe connection, drug delivery trunk are connected to tank is adjusted, and the second dosing pump 33 is provided on drug delivery trunk；Tank top is adjusted to set
It is equipped with water inlet pipe, pot bottom is adjusted and is provided with drainpipe, be provided with valve on drainpipe；The signal output end of 2nd pH electrode 32
It is connected to the control signal input of the 2nd pH transmitter 31 by signal wire, the control signal output of the 2nd pH transmitter 31
It is connected to the control signal input of the second dosing pump 33 by signal wire；
The reactor body 1 is that containment cylinder tank or closed cuboid pond, the bottom of reactor body 1 are provided with
Water inlet pipe 11, the top of reactor body 1 are provided with drainpipe 13 and backwash drainpipe, are provided with intake pump on water inlet pipe 11
12；From top to bottom be disposed with inside reactor body 1 Zero-valent Iron filter material layer 18, the first supporting layer 14, the second supporting layer 15,
Third supporting layer 16 and the 4th supporting layer 17；The Zero-valent Iron filter material layer 18 is made of zeroth order iron powder；In Zero-valent Iron filter material layer 18
Zeroth order iron powder effective grain size d10 be 250 μm, nonuniformity coefficient k80 is less than 1.5, iron content >=96%；Zero-valent Iron filter material layer
18 with a thickness of 0.5~1.5m；First supporting layer 14, the second supporting layer 15, third supporting layer 16 and the 4th supporting layer 17
It is interior to be filled with supporting layer filtrate；Supporting layer filtrate in first supporting layer 14 is and in Zero-valent Iron filter material layer 18 identical zero
Valence iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；Supporting layer filtrate in first supporting layer 14
Partial size be 0.8~2mm, 40~100mm of thickness；Supporting layer filtrate in second supporting layer 15 is and Zero-valent Iron filter material layer
Identical zeroth order iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18 in 18；Second supporting layer 15
The partial size of middle supporting layer filtrate is 2~4mm, 40~100mm of thickness；Supporting layer filtrate in the third supporting layer 16 be with
Identical zeroth order iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18 in Zero-valent Iron filter material layer 18；
The partial size of supporting layer filtrate is 4~8mm, 40~100mm of thickness in third supporting layer 16；Support in 4th supporting layer 17
Layer filtrate be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with the Zero-valent Iron powder density phase in Zero-valent Iron filter material layer 18
Same quartz sand；The partial size of supporting layer filtrate is 8~16mm, 40~100mm of thickness in 4th supporting layer 17；4th supporting layer
17 bottoms are provided with big resistance cloth water assembly 22；18 lower part of Zero-valent Iron filter material layer is provided with slight drag cloth water assembly 23；Big resistance
The water inlet end of cloth water assembly 22 is connected to 11 water outlet of water inlet pipe；The water inlet pipe of slight drag cloth water assembly 23 is leant out to reactor master
1 bottom of body is provided with valve on the water inlet pipe of the slight drag cloth water assembly 23 outside reactor body 1；It is adjusted in regulating system 3
The drainpipe of pot bottom setting is connected to the water inlet for the water inlet pipe 11 that 1 bottom of reactor body is arranged；
The pretreatment system 6 is made of pretreatment unit 62, sedimentation basin 63, sludge reservoir 64, plate and frame filter press 65；In advance
The water outlet of processing unit 62 is connected to the water inlet of sedimentation basin 63 by pipeline, and the sludge outlet and sludge of sedimentation basin 63 are store
The sludge import in pond 64 is connected to by pipeline, is provided with dredge pump, sludge on the pipeline between sedimentation basin 63 and sludge reservoir 64
The sludge outlet of reservoir 64 is connected to the sludge import of plate and frame filter press 65 by pipeline, sludge reservoir 64 and plate and frame filter press
Sludge pump, the supernatant outlet of the percolate outlet and sludge reservoir 64 of plate and frame filter press 65 are provided on pipeline between 65
It is connected to respectively with the recycling water inlet of collecting-tank 5 by pipeline；
The reuse water system 9 by reverse washing tank, the first pH transmitter 41, blender, stirring slurry, the first pH electrode 42,
First dosing pump 43 and the first medicine storing pot 44 are constituted；First pH transmitter 41, blender, stirring slurry and the first pH electrode 42 are set
It sets inside reverse washing tank, the first medicine storing pot 44 is arranged outside reverse washing tank；Reverse washing tank bottom is provided with drain pipe and anti-
Flushing pipe is provided with valve and delivery pump on backwash tube；First medicine storing pot 44 is connected to reverse washing tank by pipeline, and first adds
The pipeline that Teat pipette 43 is arranged between the first medicine storing pot 44 and reverse washing tank connects；The signal output end of first pH electrode 42 with
The control signal input of first pH transmitter 41 is connected to by signal wire, the control signal output of the first pH transmitter 41
It is connected to the control signal input of the first dosing pump 43 by signal wire；
The water outlet of the collecting-tank 5 is connected to the water inlet of pretreatment unit 62 in pretreatment system 6 by pipeline, in advance
The outfall of sedimentation basin 63 and the bottom of reactor body 1 in upward flow Zero-valent Iron filtration reactor 2 are set in processing system 6
The water inlet pipe 11 set is connected to, in upward flow Zero-valent Iron filtration reactor 2 drainpipe 13 of the top setting of reactor body 1 with it is quiet
The water inlet of state mixer 7 is connected to, and the water outlet of static mixer 7 is connected to the water inlet of manganese sand filter 8 by pipeline, manganese
The water outlet of sand filter 8 is connected to the water inlet of reuse pool 9 by pipeline；8 bottom of manganese sand filter is provided with backwash
Water inlet pipe, 8 top of manganese sand filter are provided with backwash drainpipe；The recoil that reverse washing tank bottom is arranged in reuse water system 9
Pipe is washed respectively and in reactor body 1 in the backwash water inlet pipe of manganese sand filter 8 and upward flow Zero-valent Iron filtration reactor 2
The water inlet pipe of slight drag cloth water assembly 23 is connected to by pipeline；The backwash drainpipe of 8 top of manganese sand filter setting and reaction
The backwash drainpipe of 1 top of device main body setting is connected to the recycling water inlet of collecting-tank 5 by pipeline respectively.
Fig. 4 is the schematic diagram that hardened phenomenon occurs for the existing lower ZVI into stream filter process；Arrow direction is water in Fig. 4
Flow direction；Due to the lower gravity to the waterpower squeezing action of stream and filtrate itself, filtrate is caused to generate during the filtration process
Aggregation.Filter material layer after aggregation can not provide sufficient time of filtration, therefore water flow can only be flowed by the gap between hardened piece
It is dynamic, short stream is generated, sewage can not come into full contact with filtrate, influence filter effect and reaction effect；
Hardened phenomenon occurs for filtrate during upward flow filtration in the prior art, the reason is that the gradation due to filtrate does not conform to
Reason, density is bigger than normal, and the relatively low factor of hydraulic loading of filtering, causes filtrate during the filtration process without forming ideal suspend
State, since the effect of gravity generates aggregation.Filter material layer after aggregation can not provide sufficient time of filtration, therefore water flow can only
By the gap flowing between hardened piece, short stream is generated, can not be come into full contact with filtrate, influence filter effect and reaction effect.
Fig. 5 is filtrate occupied state schematic diagram in upward flow Zero-valent Iron filtration reactor；Effective grain of zeroth order iron powder in Fig. 5
Diameter d10 is 250 μm, and nonuniformity coefficient k80 is less than 1.5, and the ferrous powder granules of small particle are interspersed in large-sized iron powder after filling
Between grain, uniform gap is formed.Fig. 6 is filtrate suspended state schematic diagram in upward flow Zero-valent Iron filtration reactor；Fig. 6 can
To find out, the uniform upward flow that big resistance water distribution system generates, under hydraulic loading the expansion rate of filtrate entirety for 5~
Between 10%, suspended state is formed, uniform fluid flow is distributed in the uniform gap that bulky grain and short grained Zero-valent Iron filtrate generate
Between.Fig. 7 is that the sediment removal process such as heavy metal-iron complex are shown in upward flow Zero-valent Iron filtration reactor backwash process
It is intended to；Fig. 7 sinks it is found that can generate a large amount of heavy metal-iron complex etc. after filtering after a period of time, between ferrous powder granules
Starch blocks gap between filtrate；By the backwash of high water-base fluid, water flow can remove the sediment of these obstructions, release
The gap of filtrate reduces head resistance when conventional upward flow filtration；Fig. 8 is iron oxide in upward flow Zero-valent Iron filtration reactor
Passivation layer removal process schematic diagram；After filtering after a period of time, ferrous powder granules surface forms one layer by Fe2O3、Fe4O3Or
Fe(OH)3The iron oxide passivation layer that the oxide of equal iron is formed.Due to the presence of the passivation layer, the active Zero-valent Iron of filter material surface
It can not be come into full contact with filtered water stream, lose reducing power.Present embodiment is backwashed by weak acid by iron oxide passivation layer
Removal, weak acid backwash use the weak acid of pH=4~6, can effectively dissolve iron oxide passivation layer, while again will not be by Zero-valent Iron
Dissolution；Fig. 9 is the forming process schematic diagram of FeS layer or vulcanization iron layer in upward flow Zero-valent Iron filtration reactor；Work as water flow
In there are a certain amount of S2-When ion, Fe that Fe and Fe are formed in oxidation-reduction process2+And Fe3+Ion meeting and S2-Occur
Sulfurization forms FeS and Fe2S3, instead of iron oxide passivation layer, in the ferrous sulfide or iron sulfide of these nascent states due to
S2-Presence reduction can be equally provided.
The principle of present embodiment and the utility model has the advantages that
1, present embodiment device treatment process do not need other ancillary equipments such as electromagnetism or ultrasound can be to avoid filtrate
Hardened, short stream and loss occurs；In present embodiment upward flow Zero-valent Iron filtration reactor 2, zeroth order iron powder filtering material particle is in
The suspended state of gravity and buoyant equilibrium, sewage, which is filled between zeroth order iron powder filtering material particle, makes Zero-valent Iron filter material layer 18 be in swollen
Swollen suspended form, the phenomenon that having prevented hardened filtrate and short stream；Sewage is entered in reactor by reactor lower part, by reactor
Reactor is discharged in portion, and zeroth order iron powder filtering material particle is suspended in sewage, therefore will not sink entrance in zeroth order iron powder filtering material particle
Inlet pipeline leaks, and will not overflow from discharge pipe line；
2, in 2 operational process of present embodiment upward flow Zero-valent Iron filtration reactor, filter process only need by control into
Water pressure realizes two parameters of expansion rate and hydraulic detention time of filtrate entirety, i.e., up to standard required for controllable water treatment procedure
Concentration for the treatment of it is horizontal therefore easy to operate；
3, in present embodiment upward flow Zero-valent Iron filtration reactor operational process, by adding soluble vulcanization into water
Object makes filtrate that sulfurization (Sulfidation) occur.Sulfurization can prevent filtrate and oxygen or water effect from oxidation occurs simultaneously
Iron oxide passivation layer is formed, replaces to form ferrous sulfide or vulcanization iron layer；The ferrous sulfide or iron sulfide of synkaingenesis state
Reduction can be equally provided, the heavy metal in water removal can be removed by way of precipitating；
4. in present embodiment longtime running, cleaning the pollutant of filter material surface such as by way of backwashing and weak acid is washed
The precipitating such as iron complex, while iron oxygen passivation layer is removed, restore filtrate reducing property；Therefore filtrate has obtained pickling weight repeatedly
System improves the service life of ZVI filtrate, achievees the purpose that sufficiently to adsorb and use to greatest extent；
5, compared with conventional processing technique, present embodiment device can handle multiple pollutant such as As, Cd, Cr simultaneously,
Pb, Cu, Zn, Se, Hg etc. and the organic pollutant of oxidisability such as nitrobenzene, chlorinatedorganic, fluoride etc.；Processing cost
Low, water pollutant reaches trace concentration or less out；
6, in present embodiment after Zero-valent Iron filtrate is by exhaustive oxidation or adsorption saturation, backwash or acid can not be passed through again
When washing recovery processing capacity again, these filtrates become discarded filtrate；The waste material and residue that present embodiment device generates can
By toxic leaching test, it is not belonging to danger wastes.
Specific embodiment 2: the present embodiment is different from the first embodiment in that: the upward flow Zero-valent Iron mistake
Filtering hydraulic loading when reactor 2 is run is 4~30m3/h/m2；Air-land combat is 4~30min.Other steps and parameter with
Specific embodiment one is identical.
Specific embodiment 3: the present embodiment is different from the first and the second embodiment in that: the reactor body 1
Material is glass reinforced plastic, aluminium alloy, cast iron, carbon steel, stainless steel, plastics or armored concrete；The aluminium alloy, cast iron, carbon steel, no
The inner surface and the outer surface of the reactor body 1 for steel material of becoming rusty is coated with erosion resistant coating；The material of erosion resistant coating material is raw lacquer, laccol
Resin, phenolic resin coating, epoxy-phenolic paint, epoxy coating, chlorinated polyvinyl chloride paints, pitch, furane resins, polyurethane
Ester or inorganic zinc rich paint.Other steps and parameter are the same as one or two specific embodiments.
Specific embodiment 4: unlike one of present embodiment and specific embodiment one to three: the big resistance
Cloth water assembly 22 is strainer head；The slight drag cloth water assembly 23 is perforated pipe.Other steps and parameter and specific embodiment party
One of formula one to three is identical.
Specific embodiment 5: unlike one of present embodiment and specific embodiment one to four: the pretreatment
Device 62 is coagulative precipitation device, electric flocculation device, coagulating basin, absorption resin filtering device or sand filtering device.Other steps and
Parameter is identical as one of specific embodiment one to four.
Using following embodiment verifying the utility model has the beneficial effects that
Embodiment 1:
It is a kind of for removing the processing system of heavy metal in percolate, it is characterised in that: for removing in percolate a huge sum of money
The processing system of category is by collecting-tank 5, pretreatment system 6, upward flow Zero-valent Iron filtration reactor 2, static mixer 7, manganese sand mistake
Filter 8 and reuse water system 9 are constituted；
The upward flow Zero-valent Iron filtration reactor 2 is made of reactor body 1 and regulating system 3；
The regulating system 3 is by adjusting tank, the 2nd pH transmitter 31, blender, stirring slurry, the 2nd pH electrode 32, second
Dosing pump 33, the second medicine storing pot 34 and third medicine storing pot 35 are constituted；2nd pH transmitter 31, blender, stirring slurry and the 2nd pH
The setting of electrode 32 is being adjusted inside tank, and the second medicine storing pot 34 and the setting of third medicine storing pot 35 are being adjusted outside tank, the second medicine storing pot
34 and third medicine storing pot 35 on be respectively arranged with drug output branch pipe, the drug on the second medicine storing pot 34 and third medicine storing pot 35 is defeated
Valve is provided on branch pipe out, the drug output branch pipe on the second medicine storing pot 34 and third medicine storing pot 35 is total with drug output respectively
Pipe connection, drug delivery trunk are connected to tank is adjusted, and the second dosing pump 33 is provided on drug delivery trunk；Tank top is adjusted to set
It is equipped with water inlet pipe, pot bottom is adjusted and is provided with drainpipe, be provided with valve on drainpipe；The signal output end of 2nd pH electrode 32
It is connected to the control signal input of the 2nd pH transmitter 31 by signal wire, the control signal output of the 2nd pH transmitter 31
It is connected to the control signal input of the second dosing pump 33 by signal wire；
The reactor body 1 is that containment cylinder tank or closed cuboid pond, the bottom of reactor body 1 are provided with
Water inlet pipe 11, the top of reactor body 1 are provided with drainpipe 13 and backwash drainpipe, are provided with intake pump on water inlet pipe 11
12；From top to bottom be disposed with inside reactor body 1 Zero-valent Iron filter material layer 18, the first supporting layer 14, the second supporting layer 15,
Third supporting layer 16 and the 4th supporting layer 17；The Zero-valent Iron filter material layer 18 is made of zeroth order iron powder；In Zero-valent Iron filter material layer 18
Zeroth order iron powder effective grain size d10 be 250 μm, nonuniformity coefficient k80 is less than 1.5, iron content >=96%；Zero-valent Iron filter material layer
18 with a thickness of 1m；It is filled in first supporting layer 14, the second supporting layer 15, third supporting layer 16 and the 4th supporting layer 17
Supporting layer filtrate；Supporting layer filtrate in first supporting layer 14 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or
Quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is in first supporting layer 14
2mm, thickness 100mm；Supporting layer filtrate in second supporting layer 15 is and identical Zero-valent Iron in Zero-valent Iron filter material layer 18
Powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The grain of supporting layer filtrate in second supporting layer 15
Diameter is 2mm, thickness 40mm；Supporting layer filtrate in the third supporting layer 16 is and in Zero-valent Iron filter material layer 18 identical zero
Valence iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；Supporting layer filtrate in third supporting layer 16
Partial size be 4mm, thickness 40mm；Supporting layer filtrate in 4th supporting layer 17 is identical with Zero-valent Iron filter material layer 18
Zeroth order iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；Supporting layer is filtered in 4th supporting layer 17
The partial size of material is 8mm, thickness 40mm；4th supporting layer, 17 bottom is provided with big resistance cloth water assembly 22；Zero-valent Iron filter material layer 18
Lower part is provided with slight drag cloth water assembly 23；The water inlet end of big resistance cloth water assembly 22 is connected to 11 water outlet of water inlet pipe；Small resistance
The water inlet pipe of power cloth water assembly 23 is leant out to 1 bottom of reactor body, the slight drag cloth water assembly 23 outside reactor body 1
Valve is provided on water inlet pipe；In regulating system 3 adjust pot bottom setting drainpipe and 1 bottom of reactor body setting into
The water inlet of water pipe 11 is connected to；
The pretreatment system 6 is made of pretreatment unit 62, sedimentation basin 63, sludge reservoir 64, plate and frame filter press 65；In advance
The water outlet of processing unit 62 is connected to the water inlet of sedimentation basin 63 by pipeline, and the sludge outlet and sludge of sedimentation basin 63 are store
The sludge import in pond 64 is connected to by pipeline, is provided with dredge pump, sludge on the pipeline between sedimentation basin 63 and sludge reservoir 64
The sludge outlet of reservoir 64 is connected to the sludge import of plate and frame filter press 65 by pipeline, sludge reservoir 64 and plate and frame filter press
Sludge pump, the supernatant outlet of the percolate outlet and sludge reservoir 64 of plate and frame filter press 65 are provided on pipeline between 65
It is connected to respectively with the recycling water inlet of collecting-tank 5 by pipeline；
The reuse water system 9 by reverse washing tank, the first pH transmitter 41, blender, stirring slurry, the first pH electrode 42,
First dosing pump 43 and the first medicine storing pot 44 are constituted；First pH transmitter 41, blender, stirring slurry and the first pH electrode 42 are set
It sets inside reverse washing tank, the first medicine storing pot 44 is arranged outside reverse washing tank；Reverse washing tank bottom is provided with drain pipe and anti-
Flushing pipe is provided with valve and delivery pump on backwash tube；First medicine storing pot 44 is connected to reverse washing tank by pipeline, and first adds
The pipeline that Teat pipette 43 is arranged between the first medicine storing pot 44 and reverse washing tank connects；The signal output end of first pH electrode 42 with
The control signal input of first pH transmitter 41 is connected to by signal wire, the control signal output of the first pH transmitter 41
It is connected to the control signal input of the first dosing pump 43 by signal wire；
The water outlet of the collecting-tank 5 is connected to the water inlet of pretreatment unit 62 in pretreatment system 6 by pipeline, in advance
The outfall of sedimentation basin 63 and the bottom of reactor body 1 in upward flow Zero-valent Iron filtration reactor 2 are set in processing system 6
The water inlet pipe 11 set is connected to, in upward flow Zero-valent Iron filtration reactor 2 drainpipe 13 of the top setting of reactor body 1 with it is quiet
The water inlet of state mixer 7 is connected to, and the water outlet of static mixer 7 is connected to the water inlet of manganese sand filter 8 by pipeline, manganese
The water outlet of sand filter 8 is connected to the water inlet of reuse pool 9 by pipeline；8 bottom of manganese sand filter is provided with backwash
Water inlet pipe, 8 top of manganese sand filter are provided with backwash drainpipe；The recoil that reverse washing tank bottom is arranged in reuse water system 9
Pipe is washed respectively and in reactor body 1 in the backwash water inlet pipe of manganese sand filter 8 and upward flow Zero-valent Iron filtration reactor 2
The water inlet pipe of slight drag cloth water assembly 23 is connected to by pipeline；The backwash drainpipe of 8 top of manganese sand filter setting and reaction
The backwash drainpipe of 1 top of device main body setting is connected to the recycling water inlet of collecting-tank 5 by pipeline respectively.The reactor
1 material of main body is glass reinforced plastic；The big resistance cloth water assembly 22 is strainer head；The slight drag cloth water assembly 23 is perforation
Pipe；The pretreatment unit 62 is coagulating basin.
1.2 ton/hours of system design discharge in embodiment 1,24 hours continuous operations；Pretreatment unit 62 is distinguished in order
Milk of lime, ferrous sulfate and vulcanized sodium are added, adding concentration is respectively 105mg/L, 55mg/L and 5mg/L；Upward flow Zero-valent Iron
The design air-land combat 10min of filtration reactor 2 designs hydraulic loading 10m3/h/m2；It is adjusted in tank in regulating system 3
The pH of sewage is adjusted to 5.5；PH adjust use pH value for 2 hydrochloric acid；Adjust the S of sewage in tank2-Concentration be 0.05mg/L,
S2-Concentration, which is adjusted, uses calcium sulfide；The residence time of regulating system 3 is 30min；Period using 9 pickling of reuse water system is 1
Week, the pickling time of each pickling cycle are 30 minutes, and pH is 5 in reverse washing tank when pickling；It is recoiled using reuse water system 9
Hydraulic loading when washing is 30m3/h/m2；Backwashing period is 24 hours, and the backwashing time of each backwashing period is 30 points
Clock；
The process object of embodiment 1 is the percolate smelting slag heap and generating, the total quantity control on emission of percolate and processing
It the results are shown in Table 1,0.0005L represents detection limit of the concentration in detection method of the detection of treated water pollutant in table 1
0.0005PPM or less；Percolate discharges after processing, and treating capacity is 25 ton per days, As in water outlet, and the concentration of Cd, Pb are respectively
0.0231PPM,<0.0005PPM,<0.0005PPM, removal rate are respectively 90%,>99%,>99%；Emission request reaches
GB3838-2002IV class water quality standard.Illustrate that the present embodiment effectively removes the heavy metal ion in percolate, water after processing
In As meet emission request.
Table 1
| Pollutant | Total As | Total Cd | Total Pb |
| Unit | PPM | PPM | PPM |
| It is up to standard to require GB3838-2002IV | <0.1 | <0.005 | <0.05 |
| Percolate enters water concentration | 5.1251 | 5.1293 | 3.2092 |
| Concentration after leachate pretreatment | 0.2538 | 0.0132 | 0.0112 |
| Percolate aqueous concentration | 0.0231 | 0.0005L* | 0.0005L* |
Claims (5)
1. a kind of for removing the processing system of heavy metal in percolate, it is characterised in that: for removing heavy metal in percolate
Processing system by collecting-tank (5), pretreatment system (6), upward flow Zero-valent Iron filtration reactor (2), static mixer (7),
Manganese sand filter (8) and reuse water system (9) are constituted；
The upward flow Zero-valent Iron filtration reactor (2) is made of reactor body (1) and regulating system (3)；
The regulating system (3) is by adjusting tank, the 2nd pH transmitter (31), blender, stirring slurry, the 2nd pH electrode (32),
Two dosing pumps (33), the second medicine storing pot (34) and third medicine storing pot (35) are constituted；2nd pH transmitter (31), blender, stirring
Slurry and the setting of the 2nd pH electrode (32) are being adjusted inside tank, and the second medicine storing pot (34) and third medicine storing pot (35) setting are adjusting tank
Be respectively arranged on outside, the second medicine storing pot (34) and third medicine storing pot (35) drug output branch pipe, the second medicine storing pot (34) and
Drug on third medicine storing pot (35) exports and is provided with valve on branch pipe, on the second medicine storing pot (34) and third medicine storing pot (35)
Drug output branch pipe is connected to drug delivery trunk respectively, and drug delivery trunk is connected to tank is adjusted, and is set on drug delivery trunk
It is equipped with the second dosing pump (33)；It adjusts tank top and is provided with water inlet pipe, adjust pot bottom and be provided with drainpipe, be arranged on drainpipe
There is valve；The signal output end of 2nd pH electrode (32) and the control signal input of the 2nd pH transmitter (31) pass through signal wire
Connection, the control signal output of the 2nd pH transmitter (31) and the control signal input of the second dosing pump (33) pass through signal
Line connection；
The reactor body (1) is containment cylinder tank or closed cuboid pond, and the bottom of reactor body (1) is provided with
Water inlet pipe (11), the top of reactor body (1) are provided with drainpipe (13) and backwash drainpipe, and water inlet pipe is arranged on (11)
There are intake pump (12)；Zero-valent Iron filter material layer (18), the first supporting layer are from top to bottom disposed with inside reactor body (1)
(14), the second supporting layer (15), third supporting layer (16) and the 4th supporting layer (17)；The Zero-valent Iron filter material layer (18) is by zeroth order
Iron powder is constituted；The effective grain size d10 of zeroth order iron powder in Zero-valent Iron filter material layer (18) is 250 μm, and nonuniformity coefficient k80 is less than
1.5, iron content >=96%；Zero-valent Iron filter material layer (18) with a thickness of 0.5~1.5m；First supporting layer (14), second are held
Ask layer (15), third supporting layer (16) and the 4th supporting layer (17) interior filled with supporting layer filtrate；First supporting layer (14)
In supporting layer filtrate be with identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or with zero in Zero-valent Iron filter material layer (18)
The identical quartz sand of valence iron powder density；In first supporting layer (14) partial size of supporting layer filtrate be 0.8~2mm, thickness 40~
100mm；Supporting layer filtrate in second supporting layer (15) be with identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or
Quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；The grain of supporting layer filtrate in second supporting layer (15)
Diameter is 2~4mm, 40~100mm of thickness；Supporting layer filtrate in the third supporting layer (16) is and Zero-valent Iron filter material layer (18)
In identical zeroth order iron powder or quartz sand identical with the Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；Third supporting layer
(16) partial size of supporting layer filtrate is 4~8mm, 40~100mm of thickness in；Supporting layer filtrate in 4th supporting layer (17)
For and Zero-valent Iron filter material layer (18) in identical zeroth order iron powder or identical as the Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)
Quartz sand；The partial size of supporting layer filtrate is 8~16mm, 40~100mm of thickness in 4th supporting layer (17)；4th supporting layer
(17) bottom is provided with big resistance cloth water assembly (22)；Zero-valent Iron filter material layer (18) lower part is provided with slight drag cloth water assembly
(23)；The water inlet end of big resistance cloth water assembly (22) is connected to water inlet pipe (11) water outlet；Slight drag cloth water assembly (23) into
Water pipe is leant out to reactor body (1) bottom, is set on the water inlet pipe of the external slight drag cloth water assembly (23) of reactor body (1)
It is equipped with valve；The drainpipe of pot bottom setting and the water inlet pipe of reactor body (1) bottom setting are adjusted in regulating system (3)
(11) water inlet connection；
The pretreatment system (6) is by pretreatment unit (62), sedimentation basin (63), sludge reservoir (64), plate and frame filter press (65)
It constitutes；The water outlet of pretreatment unit (62) is connected to the water inlet of sedimentation basin (63) by pipeline, the sludge of sedimentation basin (63)
Outlet is connected to the sludge import of sludge reservoir (64) by pipeline, the pipeline between sedimentation basin (63) and sludge reservoir (64)
On be provided with dredge pump, the sludge outlet of sludge reservoir (64) is connected to the sludge import of plate and frame filter press (65) by pipeline,
Sludge pump is provided on pipeline between sludge reservoir (64) and plate and frame filter press (65), the percolate of plate and frame filter press (65) goes out
The supernatant outlet of mouth and sludge reservoir (64) is connected to the recycling water inlet of collecting-tank (5) by pipeline respectively；
The reuse water system (9) is by reverse washing tank, the first pH transmitter (41), blender, stirring slurry, the first pH electrode
(42), the first dosing pump (43) and the first medicine storing pot (44) are constituted；First pH transmitter (41), blender, stirring slurry and first
PH electrode (42) is arranged inside reverse washing tank, and the first medicine storing pot (44) is arranged outside reverse washing tank；Reverse washing tank bottom is set
It is equipped with drain pipe and backwash tube, is provided with valve and delivery pump on backwash tube；First medicine storing pot (44) and reverse washing tank are logical
Piping connection, the pipeline that the first dosing pump (43) is arranged between the first medicine storing pot (44) and reverse washing tank connect；First pH
The signal output end of electrode (42) is connected to the control signal input of the first pH transmitter (41) by signal wire, and the first pH becomes
The control signal output of device (41) and the control signal input of the first dosing pump (43) is sent to be connected to by signal wire；
The water outlet of the collecting-tank (5) is connected to the water inlet of pretreatment unit (62) in pretreatment system (6) by pipeline,
The outfall of sedimentation basin (63) and reactor body in upward flow Zero-valent Iron filtration reactor (2) in pretreatment system (6)
(1) water inlet pipe (11) of bottom setting is connected to, the top of reactor body (1) in upward flow Zero-valent Iron filtration reactor (2)
The drainpipe (13) of setting is connected to the water inlet of static mixer (7), the water outlet and manganese sand filter of static mixer (7)
(8) water inlet is connected to by pipeline, and the water outlet of manganese sand filter (8) and the water inlet of reuse water system (9) pass through pipeline
Connection；Manganese sand filter (8) bottom is provided with backwash water inlet pipe, and manganese sand filter (8) top is provided with backwash drainpipe；
In reuse water system (9) reverse washing tank bottom be arranged backwash tube respectively with the backwash water inlet pipe of manganese sand filter (8) and
The water inlet pipe of slight drag cloth water assembly (23) in upward flow Zero-valent Iron filtration reactor (2) in reactor body (1) passes through pipe
Road connection；The backwash drainpipe of manganese sand filter (8) top setting and the backwash draining of reactor body (1) top setting
Pipe is connected to the recycling water inlet of collecting-tank (5) by pipeline respectively.
2. according to claim 1 for removing the processing system of heavy metal in percolate, it is characterised in that: on described to
Hydraulic loading is 4~30m when flowing Zero-valent Iron filtration reactor (2) operation3/h/m2；Air-land combat is 4~30min.
3. according to claim 1 for removing the processing system of heavy metal in percolate, it is characterised in that: the reaction
Device main body (1) material is glass reinforced plastic, aluminium alloy, cast iron, carbon steel, stainless steel, plastics or armored concrete；The aluminium alloy, casting
Iron, carbon steel, stainless steel material reactor body (1) the inner surface and the outer surface be coated with erosion resistant coating；The material of erosion resistant coating material
Matter is raw lacquer, cashew resin, phenolic resin coating, epoxy-phenolic paint, epoxy coating, chlorinated polyvinyl chloride paints, pitch, furans tree
Rouge, polyurethanes or inorganic zinc rich paint.
4. according to claim 1 for removing the processing system of heavy metal in percolate, it is characterised in that: the big resistance
Power cloth water assembly (22) is strainer head；The slight drag cloth water assembly (23) is perforated pipe.
5. according to claim 1 for removing the processing system of heavy metal in percolate, it is characterised in that: the pre- place
Managing device (62) is coagulative precipitation device, electric flocculation device, coagulating basin, absorption resin filtering device or sand filtering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821874626.5U CN209065615U (en) | 2018-11-14 | 2018-11-14 | It is a kind of for removing the processing system of heavy metal in percolate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821874626.5U CN209065615U (en) | 2018-11-14 | 2018-11-14 | It is a kind of for removing the processing system of heavy metal in percolate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209065615U true CN209065615U (en) | 2019-07-05 |
Family
ID=67099086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821874626.5U Active CN209065615U (en) | 2018-11-14 | 2018-11-14 | It is a kind of for removing the processing system of heavy metal in percolate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209065615U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179789A (en) * | 2018-11-14 | 2019-01-11 | 哈尔滨泽能环保科技有限公司 | It is a kind of for removing the processing system of heavy metal in percolate |
-
2018
- 2018-11-14 CN CN201821874626.5U patent/CN209065615U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179789A (en) * | 2018-11-14 | 2019-01-11 | 哈尔滨泽能环保科技有限公司 | It is a kind of for removing the processing system of heavy metal in percolate |
| CN109179789B (en) * | 2018-11-14 | 2024-01-23 | 哈尔滨泽能环保科技有限公司 | Treatment system for removing heavy metals in leachate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102503030B (en) | System for treating heavy metal wastewater | |
| CN102951749B (en) | Method and device for removing heavy metals in industrial wastewater by nanoscale zero-valent iron-multilevel reversed filter type system | |
| Gan et al. | Antimony (Sb) pollution control by coagulation and membrane filtration in water/wastewater treatment: A comprehensive review | |
| CN102884010A (en) | Zero valent iron/iron oxide mineral/ferrous iron composite for treatment of a contaminated fluid | |
| CN109317091A (en) | A kind of modified meerschaum heavy-metal adsorption material and preparation method | |
| CN102234161B (en) | Method for treating high-concentration arsenic-containing wastewater | |
| CN101264946A (en) | Iron-carbon pipe component capable of purifying waste water, integrated magnetoelectric oxidation biological filter chamber and application system | |
| CN102153176A (en) | Attapulgite carrier flocculation water treatment agent and production method | |
| CN103112918B (en) | Integrated process for treating heavy metal wastewater | |
| CN108455768A (en) | It is a kind of using water reuse as the organic-inorganic polluted heavy metals production wastewater treatment method of core | |
| CN101920188A (en) | Method for modifying manganese ore and application thereof in removal of arsenic from groundwater permeable reactive wall | |
| CN101096279A (en) | Multifunctional critical multiple catalyzing electrolysis set equipment | |
| CN101244860A (en) | Extremely-high concentration multi-species heavy metal waste liquid treatment method and apparatus | |
| CN204803171U (en) | Electroplating wastewater treatment device | |
| CN109231719A (en) | It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage | |
| CN209065615U (en) | It is a kind of for removing the processing system of heavy metal in percolate | |
| CN203007063U (en) | Comprehensive wastewater treatment device of inorganic laboratory | |
| CN109231409A (en) | It is a kind of for removing the upward flow Zero-valent Iron filtration reactor and filtration system of underwater trace concentration heavy metal | |
| CN209143972U (en) | It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage | |
| CN105016569B (en) | Processing system and method for cold rolling reverse osmosis strong brine | |
| CN209276210U (en) | It is a kind of for removing the upward flow Zero-valent Iron filtration reactor and filtration system of underwater trace concentration heavy metal | |
| CN109179789A (en) | It is a kind of for removing the processing system of heavy metal in percolate | |
| CN102303931A (en) | Treating method and device for electroplating wastewater | |
| CN207361939U (en) | A kind of skid-mounted type low concentration heavy metal water processing equipment | |
| CN208561983U (en) | A kind of heavy metal waste water treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |