CN209143972U - It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage - Google Patents
It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage Download PDFInfo
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Abstract
It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage, be related to a kind of sewage plant processing system.In order to solve the problems, such as in municipal sewage plant sewage disposal process that ZVI easily occurs hardened filtrate, short stream and is lost.Tthe utility model system is made of filtering ponds, advanced oxidation processing unit, biofilter, upward flow Zero-valent Iron filtration reactor, static mixer, manganese sand filter and reuse water system.To avoid filtrate hardened, short stream and loss can occur for utility model device；The service life of ZVI filtrate is high；The waste material and residue that device generates can be not belonging to danger wastes by toxic leaching test；The utility model combines advanced oxidation and biofilter, and the biochemical pollutant that can degrade simultaneously includes COD, BOD, ammonia nitrogen, nitrate nitrogen and heavy metal contaminants.The utility model is suitable for sewage treatment.
Description
Technical field
The utility model belongs to technical field of water treatment equipment, and in particular to a kind of sewage plant processing system.
Background technique
The major pollutants of municipal sewage plant are mainly derived from resident living sewage in sewage plant coverage, industry is closed
Flow sewage and rainwater combined sewage.Content of beary metal is very low in general resident living sewage, even without heavy metal pollution.
If sewage plant receives the especially mining industry of industrial enterprise's discharge and the sewage of metallurgy industry discharge or the rainfall runoff in mining area
Interflow, then the sewage in sewage plant is often accompanied by different types of heavy metal.Conventional sewage disposal system and technique can
There are lower removal organic matter, total nitrogen and total phosphorus, but heavy metal is unable to get effective removal, especially in the trace for being lower than 1mg/L
When measuring in concentration range, it is unable to reach discharge standard.
The pollutant of trace concentration has the characteristics that cumulative bad and persistence, is not easy to be degraded in the environment, easily biological
Enrichment.Contaminants drinking water source will seriously threaten human health and ecological environment security into potable water system.It is another
Aspect, contaminating enterprises to the sewage of discharge need to handle it is up to standard after can just be discharged into water body, as country is to discharge standard
Requirement raising, the removal of the pollutant of micro and trace concentration is increasingly becoming the technology of disposal of pollutants person's promotion discharge standard
Bottleneck.For example, characterizing portion is a kind of dirty in urban wastewater treatment firm pollutant emission standard (standard No. GB18918-2002)
Dye object highest permission concentration of emission limit value, which need to be less than 1mg/L, the rank for being even less than 1 μ g/L or the water outlet that must not be detected, to be wanted
It asks, such as total mercury need to be lower than 1 μ g/L, alkyl mercury must not detect, and total cadmium need to be lower than 0.01mg/L, and total chromium need to be lower than 0.1mg/L, and six
Valence chromium 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, trichlorine
The concentration of emission of methane 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, need
Reach higher emission request, i.e., need to meet receiving water body at water environment quality standard (standard No. GB3838-2002)
In classification standard, wherein total mercury need to 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), always
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), and Cr VI need to be lower than 0.01mg/L
(I class water) or 0.05mg/L (II/III/IV class water) need to be lower than, total arsenic need to be lower than 0.05mg/L (I/II/III class water) or need
Lower than 0.1mg/L (IV/V class water), total lead need to be lower than 0.01mg/L (I/II class water) or need to be lower than 0.05mg/L (III/IV class
Water).With country to blowdown enterprise to the emission request of different receiving water bodies improve, find it is a kind of low cost and be able to satisfy it is micro-
The technology that the removal of the pollutant of amount and trace concentration requires has become the technical bottleneck that sewage treatment facility proposes mark transformation.It is conventional
Heavy metal pollution water treatment technology for high density pollution object removal advantageously, such as electric flocculation technique, coagulating sedimentation
Technique etc. has many successful stories, but electric flocculation technique, coagulation-settlement process etc. are handling micro and trace concentration
When, it needs to increase reaction power by way of increasing energy consumption and increasing added amount of chemical, causes cost of sewage disposal at series
Increase.Entering water heavy metal concentration 102~103When in the range of mg/L, by the processing of traditional handicraft can be stable reach
99.9% removal rate, makes pollutant concentration reach 100~101Mg/L magnitude, and keep lower operating cost.However work as
Pollutant concentration continues from 100~101Mg/L is reduced to 10-2~10-3Mg/L is even lower, 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 improve hydraulic detention time, therefore cause
Processing cost increases substantially.
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 easily occurs that filtrate is hardened, short stream to solve ZVI in existing municipal sewage plant sewage disposal process
The problem of with being lost, propose the advanced treatment system for removing heavy metal in sewage plant sewage.
The utility model is used to remove the advanced treatment system of heavy metal in sewage plant sewage by filtering ponds, advanced oxidation
Device, biofilter, upward flow Zero-valent Iron filtration reactor, static mixer, manganese sand filter and reuse water system is managed to constitute；
The upward flow Zero-valent Iron filtration reactor is made of reactor body and regulating system；The regulating system is by adjusting
Save 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
It constitutes；2nd pH transmitter, blender, stirring slurry and the setting of the 2nd pH electrode are being adjusted inside tank, the second medicine storing pot and third
Medicine storing pot setting is being adjusted outside tank, and drug output branch pipe, the second storage are respectively arranged on the second medicine storing pot and third medicine storing pot
It is provided with valve on drug output branch pipe on medicinal cupping and third medicine storing pot, the drug on the second medicine storing pot and third medicine storing pot is defeated
Branch pipe is connected to drug delivery trunk respectively out, and drug delivery trunk is connected to tank is adjusted, and the is provided on drug delivery trunk
Two dosing pumps；It adjusts tank top and is provided with water inlet pipe, adjust pot bottom and be provided with drainpipe, be provided with valve on drainpipe；The
The signal output end of two pH electrodes is connected to the control signal input of the 2nd pH transmitter by signal wire, the 2nd pH transmitter
Control signal output be connected to the control signal input of the second dosing pump by signal wire；
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 when upward flow Zero-valent Iron filtration reactor is run
~30m3/h/m2；Air-land combat is 4~30min；
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 filtering ponds are provided with wastewater inlet and recycling water inlet, the water outlet and advanced oxidation processing unit of filtering ponds
Water inlet be connected to by pipeline, the water outlet of advanced oxidation processing unit is connected to the water inlet of biofilter by pipeline,
The water outlet of biofilter is connected to the water inlet pipe for adjusting the setting of tank top, reactor master in upward flow Zero-valent Iron filtration reactor
The drainpipe of the top setting of body is connected to the water inlet of static mixer, the water outlet of static mixer and manganese sand filter
Water inlet is connected to by pipeline, and the water outlet of manganese sand filter is connected to the water inlet of reuse water system by pipeline；Manganese sand mistake
Filter bottom is provided with backwash water inlet pipe, and manganese sand filter top is provided with backwash drainpipe；It recoils in reuse water system
Cleaning of evaporator bottom setting backwash tube respectively with the backwash water inlet pipe of manganese sand filter and upward flow Zero-valent Iron filtration reactor
The water inlet pipe of slight drag cloth water assembly in middle reactor body is connected to by pipeline；The backwash of manganese sand filter top setting
Drainpipe and the backwash drainpipe of reactor body top setting are connected to the recycling water inlet of filtering ponds by pipeline respectively；
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.；
The filtering ponds are quartz sand fast filter chamber or V-type filter tank；
The advanced oxidation processing unit is ozone high grade oxidation device, ultraviolet advanced oxidation device, Fenton advanced oxidation
Device or hydrogen peroxide/ozone high grade oxidation device；
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；The acid solution is hydrochloric acid of the pH value between 1~5；
In the utility model, filtering ponds are for the suspended matter in the water after removing sewage plant second-level settling pond；Advanced oxidation
The reaction that processing unit generates further decreases sewage for improving the biodegradability of secondary effluent for hydroxyl radical reaction
COD concentration, improve the discharge standard of biochemical indicator, while coloration can be removed；Biofilter is arranged in advanced oxidation device
Later, the reaction of generation is bio-degradation reactions, for reducing BOD concentration, ammonia nitrogen and the nitrate of sewage, is further dropped
Low COD improves the discharge standard of biochemical indicator.Upward flow Zero-valent Iron filtration reactor is arranged in biofilter, filtering ponds and height
The reason of after grade oxidation treatment device is: 1, the remaining dissolution iron ion of zero-valent iron reactor can reduce advanced oxidation device
Performance blocks high grade oxidation catalytic agent material；2, for water after advanced treating, the pollutant concentrations such as COD, BOD, ammonia nitrogen are lower,
They are smaller to the consumption of Zero-valent Iron, therefore can make removal of more Zero-valent Irons for heavy metal, rather than dirty with biochemistry
Contaminate object reaction.
In the utility model, the reagent added to static mixer is potassium 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；In the utility model upward flow Zero-valent Iron filtration reactor operational process,
Filter process only needs two parameters of expansion rate and hydraulic detention time that filtrate entirety is realized by control intake pressure, i.e., adjustable
Concentration for the treatment of up to standard required for drought stress process is horizontal, therefore easy to operate；The utility model upward flow Zero-valent Iron
In filtration reactor operational process, make filtrate that sulfurization occur by adding dissolvable sulfide into water
(Sulfidation).Sulfurization can prevent filtrate and oxygen or water effect from occurring to aoxidize and forming iron oxide passivation layer, take and
Instead of form ferrous sulfide or vulcanization iron layer；The ferrous sulfide or iron sulfide of synkaingenesis state can equally provide reduction,
The heavy metal in water removal can be removed by way of precipitating；
2. 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；
3, 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.
4, compared with conventional processing technique, utility model device combines advanced oxidation and biofilter, Neng Goutong
When degradation biochemical pollutant include COD, BOD, ammonia nitrogen, nitrate nitrogen and heavy metal contaminants etc., treated for utility model device
Sewage can satisfy the level-one emission standard A and a huge sum of money of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard "
Belong to discharge standard.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model sewage plant advanced treatment system；
Fig. 2 is the structural schematic diagram of upward flow Zero-valent Iron filtration reactor 2；
Fig. 3 is the schematic diagram that hardened phenomenon occurs for the existing lower ZVI into stream filter process；Arrow direction is water in Fig. 3
Flow direction；
Fig. 4 is filtrate occupied state schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 5 is filtrate suspended state schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 6 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. 7 is iron oxide passivation layer removal process schematic diagram in upward flow Zero-valent Iron filtration reactor；
Fig. 8 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. 1~8, present embodiment is for removing sewage plant sewage
The advanced treatment system of middle heavy metal is filtered by filtering ponds 5, advanced oxidation processing unit 6, biofilter 4, upward flow Zero-valent Iron
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
By adjusting tank, the 2nd pH transmitter 31, blender, stirring slurry, the 2nd pH electrode 32, the second dosing pump 33, the second medicine storing pot 34
It is constituted with third medicine storing pot 35；2nd pH transmitter 31, blender, stirring slurry and the setting of the 2nd pH electrode 32 are being adjusted in tank
Portion, the second medicine storing pot 34 and the setting of third medicine storing pot 35 are being adjusted outside tank, are divided on the second medicine storing pot 34 and third medicine storing pot 35
It is not provided with drug output branch pipe, is provided with valve on the drug output branch pipe on the second medicine storing pot 34 and third medicine storing pot 35,
Drug output branch pipe on second medicine storing pot 34 and third medicine storing pot 35 is connected to drug delivery trunk respectively, drug delivery trunk
It is connected to tank is adjusted, the second dosing pump 33 is provided on drug delivery trunk；It adjusts tank top and is provided with water inlet pipe, adjust tank bottom
Portion is provided with drainpipe, is provided with valve on drainpipe；The signal output end of 2nd pH electrode 32 and the 2nd pH transmitter 31
Control signal input is connected to by signal wire, the control of the control signal output of the 2nd pH transmitter 31 and the second dosing pump 33
Signal input part processed is connected to 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；The effective grain size of zeroth order iron powder in Zero-valent Iron filter material layer 18
D10 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；
Support is filled in first supporting layer 14, the second supporting layer 15, third supporting layer 16 and the 4th supporting layer 17
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 with
The identical quartz sand of 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
0.8~2mm, 40~100mm of thickness；
Supporting layer filtrate in second supporting layer 15 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is 2 in second supporting layer 15
~4mm, 40~100mm of thickness；
Supporting layer filtrate in the third supporting layer 16 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is 4 in third supporting layer 16
~8mm, 40~100mm of thickness；
Supporting layer filtrate in 4th supporting layer 17 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is 8 in 4th supporting layer 17
~16mm, 40~100mm of thickness；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；What the drainpipe and 1 bottom of reactor body that pot bottom setting is adjusted in regulating system 3 were arranged
The water inlet of water inlet pipe 11 is connected to；The big resistance cloth water assembly 22 is strainer head；The slight drag cloth water assembly 23 is to wear
Kong Guan；
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 filtering ponds 5 are provided with wastewater inlet and recycling water inlet, and water outlet and the advanced oxidation processing of filtering ponds 5 fill
It sets 6 water inlet to be connected to by pipeline, the water outlet of advanced oxidation processing unit 6 and the water inlet of biofilter 4 pass through pipeline
Connection, the water outlet of biofilter 4 is connected to the water inlet pipe for adjusting the setting of tank top, in upward flow Zero-valent Iron filtration reactor 2
The drainpipe 13 of the top setting of reactor body 1 is connected to the water inlet of static mixer 7, the water outlet of static mixer 7
It is connected to the water inlet of manganese sand filter 8 by pipeline, the water outlet of manganese sand filter 8 and the water inlet of reuse water system 9 are logical
Piping connection；8 bottom of manganese sand filter is provided with backwash water inlet pipe, and 8 top of manganese sand filter is provided with backwash draining
Pipe；The backwash tube that reverse washing tank bottom is arranged in reuse water system 9 respectively with the backwash water inlet pipe of manganese sand filter 8 and upper
The water inlet pipe of slight drag cloth water assembly 23 into stream Zero-valent Iron filtration reactor 2 in reactor body 1 is connected to by pipeline；Manganese
8 top of sand filter setting backwash drainpipe and 1 top of reactor body setting backwash drainpipe respectively with filtering
The recycling water inlet in pond 5 is connected to by pipeline.
Fig. 3 is the schematic diagram that hardened phenomenon occurs for the existing lower ZVI into stream filter process；Arrow direction is water in Fig. 3
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. 4 is filtrate occupied state schematic diagram in upward flow Zero-valent Iron filtration reactor；Effective grain of zeroth order iron powder in Fig. 4
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. 5 is filtrate suspended state schematic diagram in upward flow Zero-valent Iron filtration reactor；Fig. 5 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. 6 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. 6 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. 7 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. 8 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；Present embodiment upward flow Zero-valent Iron filtration reactor 2 is run
In the process, filter process only needs expansion rate and hydraulic detention time two ginsengs that filtrate entirety is realized by control intake pressure
It counts, i.e., concentration for the treatment of up to standard required for controllable water treatment procedure is horizontal, therefore easy to operate；In present embodiment to
It flows in Zero-valent Iron filtration reactor operational process, makes filtrate that sulfurization occur by adding dissolvable sulfide into water
(Sulfidation).Sulfurization can prevent filtrate and oxygen or water effect from occurring to aoxidize and forming iron oxide passivation layer, take and
Instead of form ferrous sulfide or vulcanization iron layer；The ferrous sulfide or iron sulfide of synkaingenesis state can equally provide reduction,
The heavy metal in water removal can be removed by way of precipitating；
2. 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；
3, 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.
4, compared with conventional processing technique, present embodiment device combines advanced oxidation and biofilter, Neng Goutong
When degradation biochemical pollutant include COD, BOD, ammonia nitrogen, nitrate nitrogen and heavy metal contaminants etc., treated for present embodiment device
Sewage can satisfy the level-one emission standard A and a huge sum of money of GB 18918-2002 " urban wastewater treatment firm pollutant emission standard "
Belong to discharge standard.
Using following embodiment verifying the utility model has the beneficial effects that
Embodiment 1:
The present embodiment is used to remove the advanced treatment system of heavy metal in sewage plant sewage by filtering ponds 5, advanced oxidation
Manage device 6, biofilter 4, 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
By adjusting tank, the 2nd pH transmitter 31, blender, stirring slurry, the 2nd pH electrode 32, the second dosing pump 33, the second medicine storing pot 34
It is constituted with third medicine storing pot 35；2nd pH transmitter 31, blender, stirring slurry and the setting of the 2nd pH electrode 32 are being adjusted in tank
Portion, the second medicine storing pot 34 and the setting of third medicine storing pot 35 are being adjusted outside tank, are divided on the second medicine storing pot 34 and third medicine storing pot 35
It is not provided with drug output branch pipe, is provided with valve on the drug output branch pipe on the second medicine storing pot 34 and third medicine storing pot 35,
Drug output branch pipe on second medicine storing pot 34 and third medicine storing pot 35 is connected to drug delivery trunk respectively, drug delivery trunk
It is connected to tank is adjusted, the second dosing pump 33 is provided on drug delivery trunk；It adjusts tank top and is provided with water inlet pipe, adjust tank bottom
Portion is provided with drainpipe, is provided with valve on drainpipe；The signal output end of 2nd pH electrode 32 and the 2nd pH transmitter 31
Control signal input is connected to by signal wire, the control of the control signal output of the 2nd pH transmitter 31 and the second dosing pump 33
Signal input part processed is connected to 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；The effective grain size of zeroth order iron powder in Zero-valent Iron filter material layer 18
D10 is 250 μm, and nonuniformity coefficient k80 is 1.1, iron content >=96%；Zero-valent Iron filter material layer 18 with a thickness of 1.5m；
Support is filled in first supporting layer 14, the second supporting layer 15, third supporting layer 16 and the 4th supporting layer 17
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 with
The identical quartz sand of 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 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is in second supporting layer 15
4mm, thickness 40mm；
Supporting layer filtrate in the third supporting layer 16 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is in third supporting layer 16
4mm, thickness 40mm；
Supporting layer filtrate in 4th supporting layer 17 be with zeroth order iron powder identical in Zero-valent Iron filter material layer 18 or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer 18；The partial size of supporting layer filtrate is in 4th supporting layer 17
16mm, thickness 40mm；4th supporting layer, 17 bottom is 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；The water inlet end of big resistance cloth water assembly 22 is connected to 11 water outlet of water inlet pipe；Slight drag cloth water assembly
23 water inlet pipe is leant out to 1 bottom of reactor body, is set on the water inlet pipe of the slight drag cloth water assembly 23 outside reactor body 1
It is equipped with valve；In regulating system 3 adjust pot bottom setting drainpipe and 1 bottom of reactor body setting water inlet pipe 11 into
Mouth of a river connection；The big resistance cloth water assembly 22 is strainer head；The slight drag cloth water assembly 23 is perforated pipe；
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 filtering ponds 5 are provided with wastewater inlet and recycling water inlet, and water outlet and the advanced oxidation processing of filtering ponds 5 fill
It sets 6 water inlet to be connected to by pipeline, the water outlet of advanced oxidation processing unit 6 and the water inlet of biofilter 4 pass through pipeline
Connection, the water outlet of biofilter 4 is connected to the water inlet pipe for adjusting the setting of tank top, in upward flow Zero-valent Iron filtration reactor 2
The drainpipe 13 of the top setting of reactor body 1 is connected to the water inlet of static mixer 7, the water outlet of static mixer 7
It is connected to the water inlet of manganese sand filter 8 by pipeline, the water outlet of manganese sand filter 8 and the water inlet of reuse water system 9 are logical
Piping connection；8 bottom of manganese sand filter is provided with backwash water inlet pipe, and 8 top of manganese sand filter is provided with backwash draining
Pipe；The backwash tube that reverse washing tank bottom is arranged in reuse water system 9 respectively with the backwash water inlet pipe of manganese sand filter 8 and upper
The water inlet pipe of slight drag cloth water assembly 23 into stream Zero-valent Iron filtration reactor 2 in reactor body 1 is connected to by pipeline；Manganese
8 top of sand filter setting backwash drainpipe and 1 top of reactor body setting backwash drainpipe respectively with filtering
The recycling water inlet in pond 5 is connected to by pipeline.
Described 1.2 ton/hours of 2 design discharge of upward flow Zero-valent Iron filtration reactor, 24 hours continuous operations, water when operation
Power load is 15m3/h/m2；Air-land combat is 15min；1 material of reactor body is glass reinforced plastic；The filtering ponds 5
For V-type filter tank；The advanced oxidation processing unit 6 is ozone high grade oxidation device；
The pH that sewage in tank is adjusted in regulating system 3 is adjusted to 5.5；PH adjust use pH value for 2 hydrochloric acid；It adjusts in tank
S in sewage2-Concentration be 0.05mg/L, S2-Concentration, which is adjusted, uses calcium sulfide；The residence time of regulating system 3 is 30min；Benefit
It was 1 week with period of 9 pickling of reuse water system, the pickling time of each pickling cycle is 10 minutes, and when pickling backwashes
PH is 5 in tank；Hydraulic loading when being backwashed using reuse water system 9 is 30m3/h/m2；Backwashing period is 24 hours, each
The backwashing time of backwashing period is 15 minutes.
The process object of embodiment 1 is the sewage treatment plant in certain mining city, and pollutant is flat before handling through the present embodiment device
Equal concentration and processing result are shown in Table 1, inspection of the concentration of the detection of the ND water pollutant that represents that treated in detection method in table 1
Below rising limit；The sewage discharged after the processing of the present embodiment device reaches GB3838-2002IV class water quality standard and GB18918-
2002 one kind A grade standards.Illustrate that the present embodiment goes the biochemical pollutant in municipal wastewater and heavy metal contaminants effectively
It removes.
Table 1 (unit: mg/L)
Claims (5)
1. a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage, it is characterised in that: the system is by filtering ponds
(5), advanced oxidation processing unit (6), biofilter (4), 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 adjusting system
(3) are united by adjusting tank, the 2nd pH transmitter (31), blender, stirring slurry, the 2nd pH electrode (32), the second dosing pump (33), the
Two medicine storing pots (34) and third medicine storing pot (35) are constituted；2nd pH transmitter (31), blender, stirring slurry and the 2nd pH electrode
(32) setting is being adjusted inside tank, and the second medicine storing pot (34) and third medicine storing pot (35) setting are being adjusted outside tank, the second drug storage
Drug output branch pipe, the second medicine storing pot (34) and third medicine storing pot (35) are respectively arranged on tank (34) and third medicine storing pot (35)
On drug output branch pipe on be provided with valve, drug on the second medicine storing pot (34) and third medicine storing pot (35) output branch pipe divides
It is not connected to drug delivery trunk, drug delivery trunk is connected to tank is adjusted, and the second dosing pump is provided on drug delivery trunk
(33)；It adjusts tank top and is provided with water inlet pipe, adjust pot bottom and be provided with drainpipe, be provided with valve on drainpipe；2nd pH
The signal output end of electrode (32) is connected to the control signal input of the 2nd pH transmitter (31) by signal wire, and the 2nd pH becomes
The control signal output of device (31) and the control signal input of the second dosing pump (33) is sent to be connected to by signal wire；
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 made of zeroth order iron powder；The effective grain size of zeroth order iron powder in Zero-valent Iron filter material layer (18)
D10 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；
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 identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；The partial size of supporting layer filtrate in first supporting layer (14)
For 0.8~2mm, 40~100mm of thickness；
Supporting layer filtrate in second supporting layer (15) be with identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；The partial size of supporting layer filtrate in second supporting layer (15)
For 2~4mm, 40~100mm of thickness；
Supporting layer filtrate in the third supporting layer (16) be with identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；The partial size of supporting layer filtrate in third supporting layer (16)
For 4~8mm, 40~100mm of thickness；
Supporting layer filtrate in 4th supporting layer (17) be with identical zeroth order iron powder in Zero-valent Iron filter material layer (18) or with
The identical quartz sand of Zero-valent Iron powder density in Zero-valent Iron filter material layer (18)；The partial size of supporting layer filtrate in 4th supporting layer (17)
For 8~16mm, 40~100mm of thickness；4th supporting layer (17) bottom is provided with big resistance cloth water assembly (22)；Zero-valent Iron filtrate
Layer (18) lower part is provided with slight drag cloth water assembly (23)；The water inlet end of big resistance cloth water assembly (22) and water inlet pipe (11) are discharged
Mouth connection；The water inlet pipe of slight drag cloth water assembly (23) is leant out to reactor body (1) bottom, reactor body (1) outside
Valve is provided on the water inlet pipe of slight drag cloth water assembly (23)；Adjust in regulating system (3) drainpipe of pot bottom setting with
The water inlet connection of the water inlet pipe (11) of reactor body (1) bottom setting；The big resistance cloth water assembly (22) is long handle filter
Head；The slight drag cloth water assembly (23) is perforated pipe；
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 filtering ponds (5) are provided with wastewater inlet and recycling water inlet, and water outlet and the advanced oxidation processing of filtering ponds (5) fill
The water inlet for setting (6) is connected to by pipeline, and the water outlet of advanced oxidation processing unit (6) and the water inlet of biofilter (4) are logical
Piping connection, the water outlet of biofilter (4) are connected to the water inlet pipe for adjusting the setting of tank top, and the filtering of upward flow Zero-valent Iron is anti-
The drainpipe (13) for answering the top of reactor body (1) in device (2) to be arranged is connected to the water inlet of static mixer (7), static
The water outlet of mixer (7) is connected to the water inlet of manganese sand filter (8) by pipeline, the water outlet of manganese sand filter (8) with
The water inlet of reuse water system (9) is connected to by pipeline；Manganese sand filter (8) bottom is provided with backwash water inlet pipe, manganese sand mistake
Filter (8) top is provided with backwash drainpipe；In reuse water system (9) reverse washing tank bottom be arranged backwash tube respectively with
Small resistance in the backwash water inlet pipe and upward flow Zero-valent Iron filtration reactor (2) of manganese sand filter (8) in reactor body (1)
The water inlet pipe of power cloth water assembly (23) is connected to by pipeline；The backwash drainpipe of manganese sand filter (8) top setting and reaction
The backwash drainpipe of device main body (1) top setting is connected to the recycling water inlet of filtering ponds (5) by pipeline respectively.
2. according to claim 1 for removing the advanced treatment system of heavy metal in sewage plant sewage, it is characterised in that:
Hydraulic loading is 4~30m when the upward flow Zero-valent Iron filtration reactor (2) runs3/h/m2；Air-land combat be 4~
30min。
3. according to claim 1 or 2 for removing the advanced treatment system of heavy metal in sewage plant sewage, feature exists
In: reactor body (1) material is glass reinforced plastic, aluminium alloy, cast iron, carbon steel, stainless steel, plastics or armored concrete；Institute
State aluminium alloy, cast iron, carbon steel, stainless steel material reactor body (1) 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 or inorganic zinc rich paint.
4. according to claim 3 for removing the advanced treatment system of heavy metal in sewage plant sewage, it is characterised in that:
The filtering ponds (5) are quartz sand fast filter chamber or V-type filter tank.
5. according to claim 4 for removing the advanced treatment system of heavy metal in sewage plant sewage, it is characterised in that:
The advanced oxidation processing unit (6) be ozone high grade oxidation device, ultraviolet advanced oxidation device, Fenton advanced oxidation device or
Hydrogen peroxide/ozone high grade oxidation device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109231719A (en) * | 2018-11-14 | 2019-01-18 | 哈尔滨泽能环保科技有限公司 | It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109231719A (en) * | 2018-11-14 | 2019-01-18 | 哈尔滨泽能环保科技有限公司 | It is a kind of for removing the advanced treatment system of heavy metal in sewage plant sewage |
| CN109231719B (en) * | 2018-11-14 | 2024-02-20 | 哈尔滨泽能环保科技有限公司 | Advanced treatment system for removing heavy metals in sewage of sewage plant |
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