CN106946433A - A kind of sludge dewatering and processing system, method - Google Patents
A kind of sludge dewatering and processing system, method Download PDFInfo
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- CN106946433A CN106946433A CN201710177094.3A CN201710177094A CN106946433A CN 106946433 A CN106946433 A CN 106946433A CN 201710177094 A CN201710177094 A CN 201710177094A CN 106946433 A CN106946433 A CN 106946433A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/126—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using drum filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
Abstract
The present invention relates to one kind dehydration and processing system, method, belong to heavy metal pollution of soil and administer field, and in particular to a kind of sludge dewatering and processing system, method.Including：Soil sedimentation basin, soil dehydration machine and the slurry pond being sequentially connected, wherein soil sedimentation basin entrance point is connected with Magneto separate tank body overfall and mud discharging mouth respectively, its water side is connected with slurry pond inducer, and the slurry pond port of export mixes pond with muddy water respectively and roller-type stone washing machine is connected.Therefore, dewatering efficiency of the present invention is high, can recycle processing water, environment-friendly high-efficiency.
Description
Technical field
The present invention relates to one kind dehydration and processing system, method, belong to heavy metal pollution of soil and administer field, and in particular to
A kind of sludge dewatering and processing system, method.
Background technology
Soil pollution is due to that material or excessive plant nutrient with physiological-toxicity enter soil and cause soil
Earth property deterioration and the phenomenon of physiological function of plants imbalance.With China's rapid development of economy, extensive economic growth mould
Formula causes soil pollution situation severe exacerbation.According to national Soil Pollution Investigation publication in 2014, the state of China 16.1%
Native area is contaminated, and 19.4% arable land is contaminated, and about 1/3rd industrial sites investigated are contaminated.Soil is dirty
Type is contaminated based on heavy metal pollution, and Organic Pollution takes second place, and compound pollution proportion is smaller.Cause the heavy metal of soil pollution
Mainly include cadmium, mercury, arsenic, copper, lead, chromium, zinc and nickel, investigation publication show these heavy metals point position exceeding standard rates be respectively 7.0%,
1.6%th, 2.7%, 2.1%, 1.5%, 1.1%, 0.9%, 4.8%, due to heavy metal in soil have disguise, cumulative bad,
Hysteresis quality and toxicity are relatively strong and the characteristics of easily by bio-absorbable, therefore very urgent for heavy metal pollution of soil repair.
The reparation of heavy-metal contaminated soil mainly has three kinds of methods.The first is that contaminated soil is carried out at security landfill
Put, this mode floor space is larger.Second is to carry out solidification and stabilization to contaminated soil, changes the heavy metal of activated state
For stable state, its migration in soil, bioavailability are reduced.This approach can reduce the poison of heavy metal in soil
Evil, but with the change of envirment factor, the stabilized process of heavy metals immobilization is possible to reverse progress, causes to repair not thorough.
The third is to remove the heavy metal in soil.Phytoremediation can realize the removing of heavy metal, and the country is ground to phytoremediation technology
Study carefully also more, but for the soil of some high concentration heavy metal pollutions, the concentration and poison of heavy metal are such as reduced without pre-treatment
Property, phytoremediation is typically infeasible.And elution technique can efficiently, without quadratic risk function, thoroughly remove contaminated soil in
Heavy metal, both can individually repair the heavy-metal contaminated soil of small area, can also be used as pretreatment technology and other restorative procedures
Use in conjunction, is increasingly widely applied.
Soil leaching technology is divided into elution in situ according to processing mode difference and dystopy is eluted.Elution method in situ is directly will
In eluent injection soil, leacheate is extracted into soil surface in downstream, then leacheate is handled, so persistently entered
OK, until soil environment quality reaches relevant criterion.Dystopy elution is to excavate contaminated soil, in input elution equipment, is adopted
The pollutant for removing or shifting and concentrate in soil is cleaned with leacheate, finally handles dense after leacheate or decrement containing pollutant
Contracting mud cake.The technology can be used for the persistence such as heavy-metal contaminated soil and polycyclic aromatic hydrocarbon, Polychlorinated biphenyls, organo-chlorine pesticide organic
The repairing and treating of contaminated soil.
Although soil washing has the advantages that in long-lasting, ease for operation and high osmosis, leachates rich in weight
The complex compound of metal and eluent, if do not dealt carefully with, can have pollution risk to underground water.
Sludge dewatering system directly affects the efficiency for drenching operation as one of most important equipment in soil washing,
And have greater environmental impacts.It is remaining in sludge dewatering system inefficiency of the prior art, and costs and poor dehydration results, sludge
Leachates severe contaminations environment.
The content of the invention
Present invention is primarily intended to solve technical problem above-mentioned present in existing Soil leaching technology, there is provided one kind
Sludge dewatering and processing system, method.
The above-mentioned purpose of the present invention is mainly addressed by following technical proposals：
A kind of sludge dewatering system, including：Soil sedimentation basin, soil dehydration machine and the slurry pond being sequentially connected, its
Middle soil sedimentation basin entrance point is connected with Magneto separate tank body overfall and mud discharging mouth respectively, its water side and the import of slurry pond
Duan Xianglian, the slurry pond port of export mixes pond with muddy water respectively and roller-type stone washing machine is connected.
Optimization, a kind of above-mentioned sludge dewatering system is also deepened at processing system, the recycle-water in-depth including recycle-water
Reason system includes：Regulating reservoir, acid storage tank, iron-carbon micro-electrolysis retort, air compressor machine, Fenton reactive tanks, dioxygen water storage tank, help solidifying
Agent storage tank, coagulative precipitation tank, sludge dewatering equipment, recycle-water storage pool, wherein, regulating reservoir and front end respectively with slurry pond and
Acid storage tank is connected, and wherein end is sequentially connected iron-carbon micro-electrolysis retort, Fenton reactive tanks, coagulative precipitation tank, sludge dewatering
Machine and recycle-water storage pool；Wherein Fenton reactive tanks and coagulative precipitation tank entrance point respectively with dioxygen water store tank and flocculation aid
Storage tank is connected；Recycle-water storage pool mixes pond and roller-type stone washing machine with muddy water and is connected coagulative precipitation tank supernatant water outlet respectively
End is connected with recycle-water storage pool.
A kind of sewage disposal system, including the sludge dewatering system described in any of the above-described claim.
Optimization, above-mentioned sewage disposal system also includes：The soil breaking system that is sequentially connected, soil argillaceous sand stone point
From system, superconduction magnetic separation system, wherein, the superconduction magnetic separation system is connected with sludge dewatering system, the sludge dewatering
System is connected back to depth of water processing system.
Optimization, above-mentioned sewage disposal system, the soil breaking system includes：Soil storage feed bin, soil breaking
Machine and belt feeder are sequentially connected with composition；
The soil argillaceous sand stone piece-rate system includes：The cylinder roto-siofter that is sequentially connected, muddy water mix pond, waterpower rotation
Flow device, dewatering screen；The import of the cylinder roto-siofter is connected with belt feeder, and connection muddy water in its fines outlet mixes pond, slightly
Material outlet connection roller-type stone washing machine, the roller-type stone washing machine coarse fodder port of export is connected with belt feeder, the mud that roller-type stone washing machine bottom is set
Water collecting groove water side is connected with dewatering screen charging aperture；
The superconduction magnetic separation system includes：Import is connected with the hydrocyclone light substance port of export, dewatering screen water side
Collecting tank；The collecting tank connects blending tank；The blending tank is connected with magnetizing mediums injector, magnetizing mediums extraction mechanism, institute
State the connection superconduction magnetic separator of magnetizing mediums extraction mechanism；
Optimization, above-mentioned sewage disposal system, soil storage feed bin side wall is equipped with broken arch motor and plate vibrator, prevents
Only blanking is blocked；The soil crusher is used for the broken of contaminated soil and its impurity；The belt feeder is used for after crushing
Soil is delivered in cylinder roto-siofter；
The cylinder roto-siofter is made up of mechanisms such as motor, reductor, drum apparatus, frames, and wherein drum apparatus is tilted
Arrangement, motor links together through reductor with cylinder mechanism, and driving cylinder mechanism is rotatable around its axis, the roto-siofter
Drum apparatus passes through body seal cap sealing.
A kind of sewage water treatment method, the processing of sewage is based on above-mentioned sewage disposal system.
Therefore, the invention has the advantages that：Simple in construction, dewatering efficiency is high, reduces the remaining leachates in soil,
And recycle-water in-depth processing system is introduced, the waste of water resource is reduced.
Brief description of the drawings
Fig. 1 is heavy-metal contaminated soil elution repair system schematic diagram；
Fig. 2 is the flow chart that heavy-metal contaminated soil elutes repair system；
Fig. 3 is that magnetic kind adds influence of the batch to lead adsorption and lead accumulative removal amount；
Fig. 4 is that magnetic kind adds influence of the batch to arsenic adsorbance and arsenic accumulative removal amount；
In figure：1- heavy-metal contaminated soils, 2- soil storage feed bin, 3- soil crushers, the belt feeders of 4.1- first, 4.2-
Second belt feeder, the belt feeders of 4.3- the 3rd, 4.4 the 4th belt feeders, 4.5 the 5th belt feeders, 5- cylinder roto-siofters, 6- rollers wash stone
Machine, 7- cleaning stones stack field, and 8- muddy water mixes pond, and 9- hydrocyclones, 10- dewatering screens, 11- cleaning sands are stacked
, 12- collecting tanks, 13- blending tanks, 14- magnetizing mediums injectors, 15- superconductions magnetic separator, 15.1- superconductors, 15.2- magnetic point
From tank body, 15.3- metal link networks, 16- system control cabinets, 17- refrigeration machines, 18- magnetizing mediums extraction mechanism, 18.1- one cyclonics
Separator, 18.2- secondary cyclones, 19- soil sedimentation basins, 20- soil dehydration machines, 21- cleaning soil, 22- washings are used
Pond, the online water quality testing meters of 23-, 24- regulating reservoirs, 25- acid storage tanks, 26- iron-carbon micro-electrolysis retort, 27- air compressor machines, 28-
Fenton reactive tanks, 29- dioxygen water storage tanks, 30- flocculation aid storage tanks, 31- coagulative precipitation tanks, 32- sludge dewatering equipments, 33- mud cakes,
34- recycle-water storage pools；Muddy water pump P1, muddy water pump P2, muddy water pump P3, muddy water pump P4, muddy water pump P6, vavuum pump P5, sludge pump
P7, sludge pump P11, clarified water pump P8, clarified water pump P9, clarified water pump P10, clarified water pump P12；Magnetic valve F1, magnetic valve F2, magnetic valve
F3, magnetic valve F4.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment：
Fig. 1 is that the heavy-metal contaminated soil of the present embodiment elutes repair process technique, including the soil breaking being sequentially connected
System, soil argillaceous sand stone piece-rate system, superconduction magnetic separation system, sludge dewatering system and recycle-water in-depth processing system.
Fig. 2 is an a kind of optional specific implementation system equipment flow of heavy-metal contaminated soil elution repair system
Figure.
Wherein, soil breaking system stores feed bin 2, the belt feeder 4.1 of soil crusher 3 and first by soil and is sequentially connected with group
Into.
The soil argillaceous sand stone piece-rate system includes：Cylinder roto-siofter 5, roller-type stone washing machine 6, muddy water mix pond 8, water
The mixing of power cyclone 9, dewatering screen 10, the second belt feeder 4.2, the 3rd belt feeder 4.3 and the 4th belt feeder 4.4, wherein muddy water is stirred
Mix pond 8 and the entrance point of roller-type stone washing machine 6 to be connected with the fines of cylinder roto-siofter 5 and the coarse fodder port of export respectively, roller-type stone washing machine 6 is exported
End be connected with the 4th belt feeder 4.4, muddy water mixing pond 8, the heavy burder port of export of hydrocyclone 9, the charging aperture of dewatering screen 10 and
5th belt feeder 4.5 is sequentially connected, and gently the material port of export is connected to superconducting magnetic point to the port of export of dewatering screen 10 in the lump with hydrocyclone 9
From the entrance point of collecting tank 12 in system, the coarse fodder port of export of roller-type stone washing machine 6 is connected with the charging aperture of dewatering screen 10.
The superconduction magnetic separation system includes collecting tank 12, blending tank 13, magnetizing mediums injector 14, superconduction magnetic separator
15th, system control cabinet 16, refrigeration machine 17 and magnetizing mediums extraction mechanism 18, wherein collecting tank 12, blending tank 13, superconduction magnetic separator
15 and magnetizing mediums extraction mechanism 18 be sequentially connected, the superconduction magnetic separator 15 respectively with system control cabinet 16 and the phase of refrigeration machine 17
Even, the entrance point of collecting tank 12 is connected with the light substance port of export of hydrocyclone 9 and the water side of dewatering screen 10 respectively；The blending tank
13 are provided with agitator arm and motor, and the top of blending tank 13 is provided with magnetizing mediums extraction mechanism and magnetizing mediums dispensing port, institute
Magnetizing mediums dispensing port is stated with magnetizing mediums injector 14 to be connected.
The superconduction magnetic separator 15 includes superconductor 15.1, Magneto separate tank body 15.2 and metal link network 15.3, described super
Conductor 15.1 can be with dismounting and change, and the superconductor 15.1 includes high-temperature superconductor and cryogenic superconductor, the Magneto separate tank body
15.2 include inlet, overfall, mud discharging mouth and two pressure-vaccum horn mouths, and the inlet is connected with the discharge outlet of blending tank 13,
The overfall is connected with the water inlet end of soil sedimentation basin 19 in collecting tank 12 and sludge dewatering system respectively, the mud discharging mouth and dirt
The water inlet end of soil sedimentation basin 19 is connected in mud dewatering system, and the magnetizing mediums extraction mechanism 18 includes primary cyclone 18.1
With secondary cyclone 18.2, described two pressure-vaccum horn mouths one are malleation, and one is negative pressure, the one cyclonic separation
The inlet port of device 18.1 is connected with negative pressure horn mouth, outlet port and the air inlet of secondary cyclone 18.2, vavuum pump P5 and
Malleation horn mouth is sequentially connected.
The sludge dewatering system includes soil sedimentation basin 19, soil dehydration machine 20 and the slurry pond being sequentially connected
22, the wherein entrance point of soil sedimentation basin 19 is connected with the overfall of Magneto separate tank body 15.2 and mud discharging mouth respectively, soil sedimentation basin 19
Water side and spoil disposal end are connected with slurry pond 22 and the entrance point of sludge concentration tank 19 respectively, the port of export of slurry pond 22 point
Pond 8 is not mixed with muddy water and the entrance point of roller-type stone washing machine 6 is connected；It is provided with the delivery port pipeline of slurry pond 22
Online water quality testing meter 23.
The recycle-water in-depth processing system includes regulating reservoir 24, acid storage tank 25, iron-carbon micro-electrolysis retort 26, air compressor machine
27th, Fenton reactive tanks 28, dioxygen water storage tank 29, flocculation aid storage tank 30, coagulative precipitation tank 31, sludge dewatering equipment 32 and recycle-water
Storage pool 34, wherein, the front end of regulating reservoir 24 is connected with slurry pond 22 and acid storage tank 25 respectively, and its end is sequentially connected iron carbon
Micro-electrolysis reaction tank 26, Fenton reactive tanks 28, coagulative precipitation tank 31, sludge dewatering equipment 32 and recycle-water storage pool 34；Wherein
Fenton reactive tanks 28 and the entrance point of coagulative precipitation tank 31 are connected with dioxygen water store tank 29 and flocculation aid storage tank 30 respectively；Reuse
The port of export of water storage pool 34 mixes pond 8 with muddy water respectively and roller-type stone washing machine 6 is connected, the supernatant water outlet of coagulative precipitation tank 31
End is connected with the entrance point of recycle-water storage pool 34；Wherein described acid storage tank 25 is at least one in storage industry sulfuric acid or hydrochloric acid
Kind, the flocculation aid storage tank 30 is used to store polyacrylamide solution.
The soil storage feed bin 2 is used for the temporary and system feeding of heavy-metal contaminated soil, and feed bin side wall is equipped with
Broken arch motor and plate vibrator, prevent that blanking from blocking；The pulverizer 3 is used for the broken of contaminated soil and its impurity；It is described
Belt feeder 4.1 is used to the soil after crushing being delivered in cylinder roto-siofter.
The soil that the cylinder roto-siofter 5 is used for after sieving approach, isolates containing the coarse fodder more than 10mm and is less than
10mm fines, the cylinder roto-siofter 5 is made up of mechanisms such as motor, reductor, drum apparatus, frames, wherein drum apparatus
It is in tilted layout, motor links together through reductor with cylinder mechanism, driving cylinder mechanism is rotatable around its axis, described time
Turn sieve drum apparatus by body seal cap sealing, so as to ensure that equipment in the course of the work, effectively prevents dust pollution；Through circle
The coarse fodder isolated of cylinder roto-siofter 5 is delivered to roller-type stone washing machine 6 by the 3rd belt feeder 4.3, the clean stone isolated, through the
Four belt feeders 4.4 are delivered to clean stone and stack field 7, and the mud obtained after separation is collected through the underdrain groove of roller-type stone washing machine 6
After enter in dewatering screen 10, the roller-type stone washing machine 6 be used for cylinder roto-siofter 5 screen out come coarse fodder elution, by thick
Expect to realize coarse fodder with the mutual friction of current, coarse fodder and equipment inner wall and coarse fodder and its surface is fine grain separates；Particle diameter
Fines less than 10mm is delivered to muddy water through the second belt feeder 4.2 and mixed in pond 8, and the muddy water, which mixes pond 8, to be used for
Water and fines are mixed with mud mixture, are separated to by stirring mixing by heavy metal in water from soil；The waterpower rotation
Stream device 9 is used to separate the larger fine particle of proportion in muddy water；The dewatering screen 10 is used to separate by hydrocyclone processing
Moisture in the thin particulate matter obtained afterwards.
The collecting tank 12 is used to collect the light substance that the water outlet of dewatering screen 10 and cyclone separator 9 give off；The mixing
Tank 13 is used for the quantitative water of collecting tank and mixed with magnetizing mediums, and the magnetizing mediums comes from magnetizing mediums extraction mechanism 18 and magnetizing mediums sample introduction
Device 14；The magnetizing mediums injector 14 supplements magnetic medium into blending tank for quantitative；The superconduction magnetic separator 15 is wrapped
Superconductor 15.1, Magneto separate tank body 15.2 and metal link network 15.3 are included, the superconductor 15.1 is used for superconduction magnetic separator 15
Inside provides predetermined high-gradient magnetic field；The Magneto separate tank body 15.2 is used to collect the muddy water that storage is mixed with magnetic medium；Institute
The magnetisable material in water can be adsorbed by stating after metal link network 15.3 is magnetized in high-gradient magnetic field；The magnetizing mediums extraction mechanism 18
The magnetic medium of heavy metal is adsorbed with metal link network 15.3 for separating and collecting；The primary cyclone 18.1 and two grades
Cyclone separator 18.2 is used to separate the magnetic medium in gas, and the magnetic medium isolated is back to use into blending tank 13 again
In.
The soil sedimentation basin 19 is used to precipitate the muddy water and magnetic of qualified discharge after the processing of superconduction magnetic separation system and is situated between
The bed mud of matter extraction mechanism discharge；The soil dehydration machine 20 is used for the concentration and dehydration of sludge slurry；The slurry pond 22
Pond 8 is mixed for the supernatant and the pressure filtration yielding water of soil dehydration machine 20 of the discharge of collecting mudpan 19, and for muddy water
With the offer water of roller-type stone washing machine 6；The online water quality testing meter 23 of water quality is used to monitor water quality condition in slurry groove, institute
Stating water quality condition includes COD (COD), ammonia nitrogen, pH and dissolved oxygen.
The regulating reservoir 24 is used for the pH value for adjusting the waste water not up to standard of the discharge of slurry pond 22；The acid storage tank 25 is used
Stored in acid solution and according to water quality in regulating reservoir and water volume condition, quantitative addition acid solution carries out pH regulations；The micro- electricity of iron carbon
Solution retort 26 is used to handle the acid waste water discharged in regulating reservoir 24, using the difference in Electrode Potential that there is 1.2V between Fe and C,
Form countless micro cell systems, a large amount of Fe produced on anode2+By Quick Oxidation into Fe3+, being formed has higher absorption wadding
Coagulate the flocculant of activity；Cathode reaction produces the hydroxyl of a large amount of nascent states, under conditions of slant acidity, the equal energy of these active components
Occur redox reaction with many components in waste water, organic macromolecule is occurred chain-scission degradation；The air compressor machine 27 is used for
Air is passed through into iron-carbon micro-electrolysis retort 26, accelerates Fe2+Oxidation rate；The Fenton reactive tanks 28 utilize addition
H2O2The Fe generated with light electrolysis2+React the hydroxyl radical free radical attack organic molecule with strong oxidizing property produced, further ore deposit
Change the organic matter not removed in decomposition water by light electrolysis；The dioxygen water storage tank 29 is used for H2O2Store and quantitative to Fenton
H is added in reactive tank 282O2；The flocculation aid storage tank 30 is stored for polyacrylamide solution, and according to the water of coagulative precipitation tank 31
Matter and the quantitative addition polyacrylamide solution of water volume condition；The coagulative precipitation tank 31 passes through sewage and flocculation aid polyacrylamide
Amine aqueous solution is mixed, and enables the particle for being difficult to precipitate in water to be aggregated with one another to form colloid, and then precipitates separation；The sludge dewatering equipment
32 are used to carry out mud-water separation to the sludge that the bottom of coagulative precipitation tank 31 is discharged；The recycle-water storage pool 34 is used for coagulating sedimentation
The collection storage of the supernatant of pond 31 and the pressure filtration yielding water of sludge dewatering equipment 32, and be that roller-type stone washing machine 6 and muddy water mixing pond 8 are carried
For water.
After said structure, the present embodiment, which is additionally provided, a kind of utilizes above-mentioned system to carry out heavy-metal contaminated soil pouring
The method for washing reparation, is concretely comprised the following steps：
(1) soil breaking
Heavy-metal contaminated soil 1 is stored in soil storage feed bin 2, by the soil crusher 3 for being arranged on bin bottom
Bulk soil is crushed, the soil particle after crushing is delivered in cylinder roto-siofter 5 through the first belt feeder 4.1 to be sieved
Point.
(2) soil argillaceous sand stone is separated
Soil after broken enters in cylinder roto-siofter 5 and sieved, and thick material is from the lower end discharging opening of cylinder roto-siofter 5
Screen out and, thin material 5 upper end outlets from cylinder roto-siofter are separated, screen out the thick material come through the 3rd belt feeder
4.3 are delivered in roller-type stone washing machine 6 and are rinsed, and obtain clean stone, and being delivered to clean stone through the 4th belt feeder 4.4 stacks
7, the muddy water collecting pit that the muddy water of generation is set through the bottom of roller-type stone washing machine 6 enters back into dewatering screen 10 after being collected and enters one
Step isolates small particle；Cylinder roto-siofter 5 screens out the fines come and is delivered to muddy water mixing pond through the second belt feeder 4.2
In 8, thin material is thoroughly mixed to form mud mixture solution, the muddy water of generation with detergent water in muddy water mixes pond 8
It is delivered to through muddy water pump P1 in hydrocyclone 9, the light component in muddy water is entered in the collecting tank 12 of superconduction magnetic separation system,
The outlet at bottom of the restructuring lease making such as sand in muddy water hydrocyclone 9 exits into dewatering screen 10 and carries out girt-water separation, residual
Fine particle on the top of dewatering screen 10 is delivered to clean sand through the 5th belt feeder 4.5 and stacks field 11.
(3) superconduction Magneto separate
The muddy water and dewatering screen 10 that top comes out in hydrocyclone 9 convey the muddy water come in collecting tank through muddy water pump P2
Mixed in 12；Mixing muddy water is quantitatively transferred in blending tank 13 through muddy water pump P3, according to the water of blending tank 13 and water quality condition, is led to
The quantitative addition magnetic medium of magnetizing mediums injector 14 is crossed, then by the stirring system built in blending tank 13, magnetic is situated between
Matter is sufficiently mixed with muddy water；It is mixed with the muddy water of magnetizing mediums to be delivered in superconduction magnetic separator 15 through muddy water pump P4, in superconductor
Under the 15.1 High-gradient Magnetic field actions provided, the metal link network 15.3 inside Magneto separate tank body 15.2 is adsorbed in water after being magnetized
Magnetisable material, with the rotation of metal link network 15.3, the magnetic medium for being adsorbed with heavy metal is carried over liquid level, is then situated between by magnetic
Matter extraction mechanism 18 is recycled；Under vavuum pump P5 effects, blown by two be arranged on Magneto separate tank body 15.2
Inhale horn mouth to separate magnetizing mediums from metal link network 15.3, then sequentially enter primary cyclone 18.1 and two grades of rotations
Magnetic kind recovery is carried out in wind separator 18.2, the magnetic kind being recovered to is added in blending tank 13 again and recycled；Through
The muddy water after superconduction magnetic separator 15 is handled is crossed, if heavy metal concentration detection is exceeded, magnetic valve F1 is opened and magnetic valve F2 is closed
Close, muddy water is back in collecting tank 12 through muddy water pump P6 and reprocessed；Otherwise magnetic valve F1 is opened and magnetic valve F2 is closed, mud
Water is delivered in soil sedimentation basin 19 through muddy water pump P6.
(4) sludge dewatering
Bottom is arranged in heavy metal concentration permitted discharge and superconduction magnetic separator 15 after the processing of superconduction magnetic separator 15
The sludge put together enters and mud-water separation is carried out in soil sedimentation basin 19, and the supernatant of soil sedimentation basin 19 enters slurry
In pond 22, base sludge is delivered to soil dehydration machine 20 by sludge pump P7 and carries out carry out mud-water separation, and cleaning is obtained after press filtration
Soil 21, press filtration water is delivered in slurry pond 22, when the water collected in slurry pond 22 is through online water quality testing meter 23
When detecting up to standard, magnetic valve F3 is opened and F4 is closed, and clarified water pump P12 is closed, and the water outlet of slurry pond 22 flows back through clarified water pump P8
Mixed to muddy water in pond 8 and roller-type stone washing machine 6；Otherwise magnetic valve F3 is closed and F4 is opened, the water outlet of slurry pond 22 warp
Clarified water pump P8 is delivered to regulating reservoir 24, and clarified water pump P12 is opened, and the water outlet of recycle-water storage pool 34 is delivered to mixing through clarified water pump P12
In stirring pool 8 and roller-type stone washing machine 6.
(5) recycle-water in-depth is handled
Free state heavy metal is largely removed after the processing of superconduction magnetic separator 15 in soil, due to possible in soil
The poisonous and harmful hardly degraded organic substance of solubilised state of presence, these organic matters are individually difficult to remove separation by superconduction Magneto separate, therefore
These organic matters can be caused to accumulate during the recycling of slurry, when organic concentration is exceeded in slurry pond 22
When, the water outlet of slurry pond 22 is delivered to regulating reservoir 24 through clarified water pump P8, according to water water and water quality situation, is stored up by acid solution
The quantitative addition acid solution of tank 24,3-4 is adjusted to by solution ph, and acid waste water is delivered to iron-carbon micro-electrolysis through clarified water pump P9 from bottom
In retort 26, and air is blasted by air compressor machine 27 inwards, due to there is 1.2V difference in Electrode Potential between Fe and C, thus
Countless micro cell systems can be formed, iron is anode, and cementite is negative electrode, and electrode reaction is：Anode Fe-2e → Fe2+, Fe2+/
Fe=-0.44V；Negative electrode 2H++ 2e → 2 [H], H+/ H2=-0.00V, under oxygen in water effect, what is produced on anode is a large amount of
Fe2+By Quick Oxidation into Fe3+, form the flocculant with higher adsorption-flocculation activity；Cathode reaction produces a large amount of nascent states
Hydroxyl, under conditions of slant acidity, with many components in waste water redox reaction can occur for these active components, make to have
Chain-scission degradation occurs for machine macromolecular；Carry not oxidized Fe2+Waste water is entered in Fenton reactive tanks 28, then by double
Oxygen water storage tank 29 is quantitatively adding H2O2, make H2O2The Fe generated with light electrolysis2+Fenton reagent is constituted, what reaction was produced has strong
The hydroxyl radical free radical attack organic molecule of oxidisability, further mineralising decomposing organic matter, and reach the purpose of organics removal；Place
Water after reason is delivered to coagulative precipitation tank 31 through clarified water pump P10, and being quantitatively adding flocculation aid by flocculation aid storage tank 30 accelerates iron wadding
The precipitation separation of solidifying body, the supernatant of coagulative precipitation tank 31 is delivered in recycle-water storage pool 34, the base sludge of coagulative precipitation tank 31
Sludge dewatering equipment 32 is delivered to through sludge pump P11 and carries out press filtration, obtains mud cake 33, press filtration water enters recycle-water storage pool 34
In, when 22 overproof water quality of slurry pond, the water in recycle-water storage pool 34 is delivered to muddy water through clarified water pump P12 and mixed
In pond 8 and roller-type stone washing machine 6.
For a kind of heavy-metal contaminated soil elution repair system and method for the present invention, by following case history to upper
State implementation result and carry out analysis checking, be specifically described as follows：
Embodiment 1：
Hunan mine pollution site remediation project, the place soil major pollutants are needed based on heavy metal lead and arsenic
It is 41000m to want rehabilitating soil earth volume3, repaired using the heavy-metal contaminated soil elution repair system of the present invention, soil
Elute in the case of device systems normal duty, average treatment amount is 150m3/ h, system carrying out practically process is as shown in Figure 2.
From soil the contaminated soil that feed bin 2 comes out is stored to crush by soil crusher 3, it is broken after soil particle through the
One belt feeder 4.1, which is delivered in cylinder roto-siofter 5, to be sieved.
Particle diameter through being screened out in cylinder roto-siofter 5 is delivered to roller through the 3rd belt feeder 4.3 more than 10mm materials and washes stone
Machine 6 is rinsed, and obtained coarse fodder is delivered to clean stone through the 4th belt feeder 4.4 and stacks field 7, and the muddy water of generation is after collection
Dewatering screen 10 is delivered to be sieved；It is defeated through the second belt feeder 4.2 that the particle diameter screened out in cylinder roto-siofter 5 is less than 10mm materials
Deliver to muddy water and mix pond 8, by the mixing that adds water, the muddy water of generation is delivered to hydrocyclone 9 through muddy water pump P1, obtains
To heavy material from the bottom of hydrocyclone 9 be flowed into dewatering screen 10 progress coarseparticulate separation, from the top of hydrocyclone 9
The light material of outflow and the water outlet of dewatering screen 10 enter collecting tank 12 in the lump.
Sewage is quantitatively transferred in blending tank 13 through muddy water pump P3 in collecting tank 12, then fixed by magnetizing mediums injector 14
The addition magnetic medium of amount, is sufficiently mixed under magnetizing mediums stirring system effect built-in in blending tank 13 with muddy water；It is mixed with
The muddy water of magnetizing mediums is delivered in superconduction magnetic separator 15 through muddy water pump P4, and the high-gradient intense magnetic field produced in superconductor 15.1 is made
Under, built-in rotatable metal link network 15.3 will be adsorbed with the magnetic medium drag-out of heavy metal in superconduction magnetic separator 15
Face, is then blown out from metal link network 15.3 magnetic medium using sky mouth of blowing the trumpet, and is entered in cyclone separator and carried out
Solid and gas is separated, and obtained magnetic medium is rejoined to be recycled in blending tank 13；Non magnetic bulky grain in leachates
Thing is deposited to the bottom of superconduction magnetic separator 15, and periodically sediment is delivered in soil sedimentation basin 19, muddy water after processing
When middle heavy metal concentration is exceeded, muddy water is back in collecting tank 12 again, otherwise the soil precipitation flowed into sludge dewatering unit
Pond 19.
The supernatant of soil sedimentation basin 19 is entered in slurry pond 22, and base sludge is delivered to soil by sludge pump P7
Dewaterer 20 carries out carry out mud-water separation, clean soil 21 is obtained after press filtration, press filtration water is delivered in slurry pond 22, when washing
When washing the water collected in millpond 22 and detecting up to standard through online water quality testing meter 23, magnetic valve F3 is opened and F4 is closed, clarified water pump
P12 is closed, and the water outlet of slurry pond 22 is back to muddy water through clarified water pump P8 and mixed in pond 8 and roller-type stone washing machine 6；Otherwise it is electric
Magnet valve F3 is closed and F4 is opened, and the water outlet of slurry pond 22 is delivered to regulating reservoir 24 through clarified water pump P8, and clarified water pump P12 is opened, and is returned
It is delivered to the water outlet of water storage pool 34 through clarified water pump P12 in mixing pond 8 and roller-type stone washing machine 6.
When organic concentration is exceeded in slurry pond 22, the water outlet of slurry pond 22 is delivered to regulating reservoir through clarified water pump P8
24, according to water water and water quality situation, by the quantitative addition acid solution of acid solution storage tank 24, solution ph is adjusted to 3-4, it is acid
Waste water is delivered in iron-carbon micro-electrolysis retort 26 through clarified water pump P9 from bottom, and blasts air inwards by air compressor machine 27,
Under oxygen in water effect, a large amount of Fe produced on anode2+By Quick Oxidation into Fe3+, being formed has higher adsorption-flocculation activity
Flocculant；Cathode reaction produces the hydroxyl of a large amount of nascent states, under conditions of slant acidity, these active components energy and waste water
In many components occur redox reaction, make organic macromolecule occur chain-scission degradation；Carry not oxidized Fe2+Waste water
Enter in Fenton reactive tanks 28, H is then quantitatively adding by dioxygen water storage tank 292O2, make H2O2The Fe generated with light electrolysis2 +Fenton reagent is constituted, the hydroxyl radical free radical attack organic molecule with strong oxidizing property produced is reacted, further mineralising is decomposed
Organic matter, and reach the purpose of organics removal；Water after processing is delivered to coagulative precipitation tank 31 through clarified water pump P10, by helping
Solidifying agent storage tank 30 is quantitatively adding the precipitation separation that flocculation aid accelerates iron floccule body, and the supernatant of coagulative precipitation tank 31 is delivered to recycle-water
In storage pool 34, the base sludge of coagulative precipitation tank 31 is delivered to sludge dewatering equipment 32 through sludge pump P11 and carries out press filtration, obtains mud cake
33, press filtration water is entered in recycle-water storage pool 34, when slurry pond overproof water quality, the water warp in recycle-water storage pool 34
Clarified water pump P12 is delivered to muddy water and mixed in pond 8 and roller-type stone washing machine 6.
From figs. 3 and 4 it can be seen that being continuously added with magnetic medium, Heavy Metals in Contaminated Soils lead and arsenic accumulation
Removal amount is first raised, after tend to be steady, often handle 1000m3Contaminated soil, the lead that can be removed and arsenic weight respectively 1800g
And 100g；
Heavy-metal contaminated soil accumulated process amount and lead and arsenic leaching concentration relation are as shown in table 1.As it can be seen from table 1
Maximum leaching concentration difference 0.056mg/L, 0.041mg/L of before processing, Heavy Metals in Contaminated Soils lead and arsenic, by the present invention
After system processing, the leaching concentration of heavy metal in soil lead and arsenic is all far below environmental standard value 0.01mg/L, 0.01mg/L, place
Manage result completely up to standard.
Table 1
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (7)
1. a kind of sludge dewatering system, it is characterised in that including：Soil sedimentation basin, soil dehydration machine and the washing being sequentially connected
Millpond, wherein soil sedimentation basin entrance point are connected with Magneto separate tank body overfall and mud discharging mouth respectively, its water side and washing
Millpond inducer is connected, and the slurry pond port of export mixes pond with muddy water respectively and roller-type stone washing machine is connected.
2. a kind of sludge dewatering system according to claim 1, it is characterised in that also deepen processing system including recycle-water
System, recycle-water in-depth processing system includes：Regulating reservoir, acid storage tank, iron-carbon micro-electrolysis retort, air compressor machine, Fenton reactions
Groove, dioxygen water storage tank, flocculation aid storage tank, coagulative precipitation tank, sludge dewatering equipment, recycle-water storage pool, wherein, regulating reservoir and front end
It is connected respectively with slurry pond and acid storage tank, wherein end is sequentially connected iron-carbon micro-electrolysis retort, Fenton reactive tanks, mixed
Solidifying sedimentation basin, sludge dewatering equipment and recycle-water storage pool；Wherein Fenton reactive tanks and coagulative precipitation tank entrance point respectively with it is double
Oxygen water store tank is connected with flocculation aid storage tank；Recycle-water storage pool mixes pond with muddy water respectively and roller-type stone washing machine is connected mixed
Solidifying sedimentation basin supernatant water side is connected with recycle-water storage pool.
3. a kind of sewage disposal system, it is characterised in that include the sludge dewatering system of any of the above-described claim.
4. sewage disposal system according to claim 3, it is characterised in that characterized in that, also including：It is sequentially connected
Soil breaking system, soil argillaceous sand stone piece-rate system, superconduction magnetic separation system, wherein, superconduction magnetic separation system and sludge dewatering
System is connected, and sludge dewatering system is connected back to depth of water processing system.
5. sewage disposal system according to claim 4, it is characterised in that
Soil breaking system includes：Soil storage feed bin, soil crusher and belt feeder are sequentially connected with composition；
Soil argillaceous sand stone piece-rate system includes：The cylinder roto-siofter that is sequentially connected, muddy water mixes pond, hydrocyclone, de-
Water sieve；The import of cylinder roto-siofter is connected with belt feeder, and connection muddy water in its fines outlet mixes pond, coarse fodder outlet connection rolling
Cylinder stone scrubber, the roller-type stone washing machine coarse fodder port of export is connected with belt feeder, the muddy water collecting tank water outlet that roller-type stone washing machine bottom is set
End is connected with dewatering screen charging aperture；
Superconduction magnetic separation system includes：The collecting tank that import is connected with the hydrocyclone light substance port of export, dewatering screen water side；
Collecting tank connects blending tank；Blending tank is connected with magnetizing mediums injector, magnetizing mediums extraction mechanism, and the connection of magnetizing mediums extraction mechanism is super
Magnetic conduction seperator.
6. sewage disposal system according to claim 5, it is characterised in that soil storage feed bin side wall is equipped with broken arch motor
And plate vibrator, prevent that blanking from blocking；Soil crusher is used for the broken of contaminated soil and its impurity；Belt feeder is used for powder
Soil after broken is delivered in cylinder roto-siofter；
Cylinder roto-siofter is made up of mechanisms such as motor, reductor, drum apparatus, frames, and wherein drum apparatus is in tilted layout, electronic
Machine links together through reductor with cylinder mechanism, and driving cylinder mechanism is rotatable around its axis, and roto-siofter drum apparatus passes through machine
Body seal cap sealing.
7. a kind of sewage water treatment method, it is characterised in that sewage disposal system of the processing of sewage based on claim 3-6.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108083609A (en) * | 2017-12-20 | 2018-05-29 | 南昌航空大学 | A kind of method that municipal sludge is nursed one's health by composite reagent |
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| CN104874599A (en) * | 2015-03-18 | 2015-09-02 | 江苏盖亚环境工程有限公司 | Soil ex-situ leaching system and method thereof |
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| CN102923890A (en) * | 2012-10-29 | 2013-02-13 | 江苏大学 | Method for treating pharmaceutical wastewater |
| CN104874599A (en) * | 2015-03-18 | 2015-09-02 | 江苏盖亚环境工程有限公司 | Soil ex-situ leaching system and method thereof |
| CN104889149A (en) * | 2015-06-10 | 2015-09-09 | 中国科学院地理科学与资源研究所 | Ectopic classification leaching repair complete process of arsenic and heavy metal contaminated soil |
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