CN106986429A - A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method - Google Patents

A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method Download PDF

Info

Publication number
CN106986429A
CN106986429A CN201710176858.7A CN201710176858A CN106986429A CN 106986429 A CN106986429 A CN 106986429A CN 201710176858 A CN201710176858 A CN 201710176858A CN 106986429 A CN106986429 A CN 106986429A
Authority
CN
China
Prior art keywords
leachates
tank
heavy
soil
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710176858.7A
Other languages
Chinese (zh)
Inventor
柯国洲
彭书平
朱丽
徐涛
王丽
李卓益
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hubei Bao Hua Hua Environmental Protection Technology Co Ltd
Original Assignee
Hubei Bao Hua Hua Environmental Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hubei Bao Hua Hua Environmental Protection Technology Co Ltd filed Critical Hubei Bao Hua Hua Environmental Protection Technology Co Ltd
Priority to CN201710176858.7A priority Critical patent/CN106986429A/en
Publication of CN106986429A publication Critical patent/CN106986429A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/48Treatment of water, waste water, or sewage with magnetic or electric fields
    • C02F1/481Treatment of water, waste water, or sewage with magnetic or electric fields using permanent magnets
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds

Abstract

The present invention relates to a kind of heavy-metal contaminated soil leachates processing equipment.Including:Washing unit, heavy metal Magneto separate unit, the precipitation dewatering unit being sequentially connected;Wherein, the washing unit is specifically included:Soil leaching tower, its inlet is connected by spray pump P2 with elution thinning tank, and its liquid outlet is connected with leachates recovery pond;The elution thinning tank is connected by eluent dope measuring pump with eluent storage tank;The leachates recovery pond is connected with the import of Soil leaching tower and collecting tank;The features such as device and method has small floor space, skid-mounted type and handled suitable for big yield leachates, can improve heavy metals removal speed in leachates;The addition of subsequent processing units flocculant and flocculation aid can be reduced, be conducive to the decrement of sludge, and sludge handled through dewaterer after the Water circulation that produces to the dilution of eluent, reduce front end Soil leaching rate of water make-up.

Description

A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method
Technical field
The present invention relates to a kind of leachates processing equipment and method, belong to heavy metal pollution of soil and administer field, specifically relate to And a kind of heavy-metal contaminated soil leachates processing equipment.
Background technology
With China's rapid development of economy, extensive mode of economic development causes soil pollution situation severe exacerbation. According to national Soil Pollution Investigation publication in 2014, the area of China 16.1% was contaminated, 19.4% arable land It is contaminated, about 1/3rd industrial sites investigated are contaminated.Soil pollution type is organic based on heavy metal pollution Thing pollution is taken 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, because heavy metal in soil has disguise, cumulative bad, hysteresis quality and toxicity relatively strong and easily by the spy of bio-absorbable Point, thus it is very urgent for heavy metal pollution of soil repair.
Current heavy metal pollution of soil recovery technique mainly includes biological prosthetic, peripheral doses, chemical remediation and its joint Recovery technique, and Soil leaching technology because its have rapidly and efficiently, treating capacity is big and with low cost the features such as it is wide at home and abroad It is general to use.Although soil washing has the advantages that long-term effect, ease for operation and high osmosis, a large amount of leachates need place Complex compound rich in heavy metal and eluent in reason, leachates, if do not dealt carefully with, can exist to underground water and pollute Risk.
The chemical leachates treatment technology of current development and application mainly has chemical method, Physical, bioanalysis.Chemical method By change heavy metal in leachates existence and be removed, such as utilize chemical precipitation, redox and electrolysis skill Art etc., the problem of this method is by precipitating reagent and reductant-oxidant secondary pollution and high electrolysis tech cost;Physical refers to Keep being excluded in the case that metallochemistry form is constant, such as pass through ion exchange, solvent extraction and UF membrane technology Concentration is carried out to the heavy metal in leachates and realizes separation, in this method by ion-exchanger species, yield and cost impact with And the problems such as fouling membrane, fouling and corrosion;Bioanalysis is to utilize the effect drop such as absorption, conversion, enrichment of microorganism heavy metal Heavy metal concentration in low or elimination leachates, bioremediation has the advantages such as the low, high treating effect of operating cost, but together Defect that when has that time-consuming, microorganism is easily poisoned, resistance to overload shock ability is weaker, sludge output is big etc..
The content of the invention
It is of the invention mainly to solve in the prior art rich in heavy metal leachates treatment effeciency is low, floor space is big and produces mud The problem of measuring high, it is proposed that a kind of heavy-metal contaminated soil leachates processing equipment and method.The equipment and method, which have, takes up an area Area is small, skid-mounted type and the features such as handled suitable for big yield leachates, can improve heavy metals removal speed in leachates;Using Heavy metal in magnetic medium adsorbing separation leachates, can reduce the addition of subsequent processing units flocculant and flocculation aid, Be conducive to the decrement of sludge, and sludge handled through dewaterer after the Water circulation that produces to the dilution of eluent, reduce front end Soil leaching rate of water make-up.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals:
A kind of heavy-metal contaminated soil leachates processing equipment, including:Washing unit, the heavy metal Magneto separate being sequentially connected Unit, precipitation dewatering unit;
Wherein, the washing unit is specifically included:
Soil leaching tower, its inlet is connected by spray pump P2 with elution thinning tank, and its liquid outlet is reclaimed with leachates Pond;The elution thinning tank is connected by eluent dope measuring pump with eluent storage tank;The leachates recovery pond and soil Eluting column is connected with the import of collecting tank;
The heavy metal Magneto separate unit is specifically included:
Blending tank, its import is connected with the outlet of collecting tank, and its outlet is connected with superconduction magnetic separator inlet, described mixed Close the magnetizing mediums dispensing port for setting and being connected with the magnetic kind chemicals dosing plant port of export above tank;The magnetizing mediums of superconduction magnetic separator is reclaimed out Mouth is connected by cyclone separator with magnetizing mediums dispensing port;
The precipitation dewatering unit is specifically included:
Mixing pit, mudpan, sludge dewatering equipment, tank and the storage mud groove being sequentially connected;Wherein, the mixing pit Inlet is connected with the overfall of superconduction magnetic separator;The import of the mixing pit is added by flocculant chemicals dosing plant, flocculation aid Medicine device is connected.
Optimization, a kind of above-mentioned heavy-metal contaminated soil leachates processing equipment, the leachates recovery pond inside is pacified Reflux pump P1, the reflux pump P1 are installed equipped with liquid level gauge, on the leachates recovery pond bottom reflux line and pass through the electricity that flows back Magnet valve F1 is connected with Soil leaching tower import, and the reflux pump P1 is connected by discharge solenoid valve F2 with collecting tank.
Optimize, a kind of above-mentioned heavy-metal contaminated soil leachates processing equipment, set in the superconduction magnetic separator Inlet, overfall, mud discharging mouth and two air pressure-vaccum horn mouths, the inlet and overfall distinguish internally positioned metallic bond Both sides are netted, mud discharging mouth is located at Magneto separate tank base, wherein, the overfall is connected with collecting tank and mixing pit respectively, spoil disposal Mouth is connected by sludge pump with mudpan, and the horn mouth one is malleation, and another is negative pressure.
Optimization, a kind of above-mentioned heavy-metal contaminated soil leachates processing equipment, the mudpan entrance point with Sludge pump is equipped with pipeline between superconduction magnetic separator mud discharging mouth end;The mudpan overfall is connected with tank, Base sludge in the mudpan is delivered to sludge dewatering equipment through sludge pump;The sludge dewatering equipment is plate compression Machine, the plate and frame filter press mud discharging mouth is connected with storage mud groove, and the plate and frame filter press leakage fluid dram is connected with tank.
A kind of method that heavy-metal contaminated soil leachates processing is carried out using the said equipment, including:
Soil leaching step, Soil leaching tower, eluent stoste are delivered to by heavy-metal contaminated soil through belt conveyor Quantitative being flowed into eluent thinning tank is mixed from eluent storage tank and tank respectively with water, after dilution is well mixed Eluent by flowmeter and spray pump it is quantitative be input to eluting column, by eluting column spray system be uniformly sprayed onto a huge sum of money Belong on contaminated soil, be then complexed by desorption, instead and dissolution shifts heavy metal in soil from the soil of solid phase Into leachates, leachates are from elution tower bottom is flowed into leachates recovery pond, and the clean soil of processing is conveyed through belt feeder Field is stacked to soil;
Superconducting magnetic separating step, after heavy metals exceeding standard leachates are delivered into collecting tank through leachates reflux pump, passes through dirt Water pump is quantitatively inputted to blending tank;According to mixing tank body reclaimed water matter requirement, magnetic medium is quantitatively provided by magnetic kind chemicals dosing plant, Magnetic medium is sufficiently mixed under the stirring of stirring system with leachates;The leachates for being mixed with magnetic medium are passed through into sewage pump Be delivered in superconduction magnetic separator, under the high-gradient intense magnetic field effect that superconductor is produced, it is built-in in superconduction magnetic separator can Rotate metal link network and take the magnetic medium for being adsorbed with heavy metal out of liquid level, then using sky blow the trumpet mouth by magnetic medium from gold Category chain is blown out on the net, and enters progress solid and gas separation in cyclone separator, and obtained solid powder rejoins blending tank It is middle to be recycled;Non magnetic bulky grain thing in leachates is deposited to superconduction magnetic separator bottom, and periodically sediment exclusion, When the leachates heavy metal concentration after processing is exceeded, leachates are back in collecting tank again, otherwise are flowed into mixing pit;
Sludge settling dehydration, flocculant is quantitatively adding into mixing pit and flocculation aid is mixed, after mixing Water and superconduction magnetic separator in the bed mud that discharges enter progress precipitation separation in mudpan, upper water enters water storage Chi Zhong, lower floor's mud enters plate and frame filter press through sludge pump, and by press filtration into mud cake after sludge dewatering, the moisture of generation is flowed into In tank, the water in tank is flowed to through blowback to be recycled in eluent storage tank.
Optimization, a kind of above-mentioned method that heavy-metal contaminated soil leachates processing is carried out using the said equipment is described In Soil leaching step, when liquid level is relatively low in leachates recovery pond, spray pump is opened and reflux pump is closed, and eluent is from dilution Constantly it is sprayed onto in tank on soil, the eluent for carrying heavy metal is entered in leachates recovery pond, causes liquid level in pond Constantly rise, when liquid level reaches liquid level gauge setting height, spray pump is closed and reflux pump and return flow solenoid valve unlatching work;With The increase of reflow's cycle, causes heavy metal concentration in leachates to raise, when heavy metal concentration exceedes relevant criterion, backflow electricity Magnet valve is closed and discharge solenoid valve is opened, and heavy metals exceeding standard leachates are delivered at superconducting magnetic separative element through reflux pump Reason, as leachates are constantly reduced in recovery pond, liquid level is constantly reduced in recovery pond, when liquid level is less than the standard that liquid level gauge is set When, system is circulated into next round.
Therefore, the invention has the advantages that:
1st, using the heavy metal in magnetic medium adsorbing separation leachates, subsequent processing units flocculant can be reduced and helped The addition of solidifying agent, is conducive to the decrement of sludge.
2nd, non-wastewater discharge, the dilution of the Water circulation that sludge is produced after being handled through dewaterer to eluent, reduces front end Soil leaching rate of water make-up.
Brief description of the drawings
Accompanying drawing 1 is a kind of schematic diagram of the present invention;
In figure, 1.1 first belt feeders, 1.2 second belt feeders, 2 eluting columns, 3 leachates recovery ponds, 4 elution thinning tanks, 5 Eluent storage tank, 6 collecting tanks, 7 blending tanks, 8 magnetic kind chemicals dosing plants, 9 superconduction magnetic separators, 10 cyclone separators, 11 flocculants Chemicals dosing plant, 12 flocculation aid chemicals dosing plants, 13 mixing pits, 14 mudpans, 15 sludge dewatering equipments, 16, storage mud groove, 17 water storages Pond, P1 reflux pumps, P2 spray pumps, P3 eluent dopes measuring pump, P4 intake pumps, P5 dredge pumps, P6 vavuum pumps, sludge pump P7, Sludge pump P8, P9 reuse water pump, F1 return flow solenoid valves, F2 discharge solenoid valves, F3 backflows ball valve, F4 ball-valves, V1 spray streams Gauge, V2 blending waters flowmeter, V3 vacuum tables.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
Embodiment:
As shown in figure 1, being a kind of heavy-metal contaminated soil leachates processing equipment of the present embodiment.In figure:
First belt feeder 1.1, the charging for heavy-metal contaminated soil in eluting column;
Second belt feeder 1.2, the discharging for handling rear soil up to standard in eluting column;
Eluting column 2, is cleaned for heavy metal contaminated soil, and top is evenly distributed with shower nozzle, the elution after dilution Agent is uniformly sprayed on heavy-metal contaminated soil;
Leachates recovery pond 3, the leachates flowed out for collecting in eluting column, the leachates of collection are circulated through reflux pump P1 Use;
Thinning tank 4 is eluted, for keeping in dense diluent and water mixed dilute eluent in proportion;
Eluent storage tank 5, for being stored to the former dope of detergent, it is dilute that dope is delivered to elution through eluent dilution pumps Release in tank and to be mixed in proportion with water;
Collecting tank 6, the leachates for receiving the heavy metals exceeding standard in leachates recovery pond;
Blending tank 7, is stirred with heavy metals exceeding standard leachates for magnetic kind and mixes;
Magnetic kind chemicals dosing plant 8, the loss for the magnetic kind required for heavy metal processing in blending tank and supplement magnetic kind;
Superconduction magnetic separator 9, for the separation of magnetic kind in mixed solution, will be inhaled by the rotatable metal link network of setting The magnetic kind of attached heavy metal takes superconduction magnetic separator out of;
Cyclone separator 10, the recycling for putting forward magnetic kind;
Flocculant chemicals dosing plant 11, for being quantitatively adding flocculant into mixing pit, contributes to solution suspension particles agglomerate Connection forms thick cotton-shaped granule or agglomerate;
Flocculation aid chemicals dosing plant 12, for being quantitatively adding flocculation aid into mixing pit, accelerates flocculation sediment speed;
Mixing pit 13, handles solution up to standard for receiving the heavy metal given off through superconduction magnetic separator overfall, passes through Flocculant and flocculation aid are quantitatively adding, accelerates the removal of other impurities in solution.
Mudpan 14, the solution of flocculant and flocculation aid is mixed with for receiving, and carry out place of settling in mixing pit 13 Reason, obtains recycle-water and sludge;
Sludge dewatering equipment 15, the sludge for being come out to mudpan carries out dehydration compression processing, and obtains mud cake;
Storage mud groove 16 is used for the mud cake for storing the generation of sludge dewatering equipment 15;
Tank 17, with connection elution thinning tank 4 outlet pipe, and with mudpan 14 and sludge dewatering equipment 15 Connected filling pipe.
The structure of the present embodiment can be divided into three units, be heavy-metal contaminated soil washing unit, leachates respectively Heavy metal Magneto separate unit and sludge settling dewatering unit.
Wherein, the eluent storage tank, dilution measuring pump, elution that heavy-metal contaminated soil washing unit includes being sequentially connected are dilute Release tank, spray pump, flowmeter, eluting column, leachates recovery pond, reflux pump and return flow solenoid valve;Wherein, the eluent storage tank For storing high concentration eluent, the high concentration eluent is chelating agent, and the chelating agent is ethylenediamine tetra-acetic acid, amino three In acetic acid, diethyl pentetic acid, ethylenediamine disuccinic acid, citric acid, malic acid, oxalic acid, Humic acids and fulvic acids extremely Few one kind;The eluent of the high concentration through dilute measuring pump be delivered in eluent thinning tank with the water in tank according to Certain proportion is prepared by mixing into the eluent of low concentration, and the eluent thinning tank contains automatic blending system;The eluent It is quantitatively transferred to by spray pump and flowmeter at the top of eluting column;Equally distributed shower nozzle is provided with the top of the eluting column, it is ensured that Eluent is uniformly sprayed on soil, and the eluting column is provided with automatic feed mouthful and discharging opening;The leachates recovery pond is used for Collect and liquid level gauge, the leachates recovery pond are installed inside the leachates of elution tower bottom outflow, the leachates recovery pond Reflux pump and return flow solenoid valve are installed on the reflux line of bottom, installed between the reflux pump magnetic valve and collecting tank on pipeline There is discharge solenoid valve;When the leachates backflow pool is in that heavy metal concentration is not exceeded in high level and leachates, reflux pump and Return flow solenoid valve is opened, and spray pump is stopped, and leachates are back at the top of eluting column through reflux pump;The leachates backflow pool When heavy metal concentration is exceeded in high level and leachates, return flow solenoid valve is closed and discharge solenoid valve is opened, and spray pump stops Only work;When the high level is changed into low liquid level, reflux pump, return flow solenoid valve and discharge solenoid valve are closed, and spray pump is opened.
Wherein, leachates heavy metal Magneto separate unit includes collecting tank, blending tank, magnetic kind chemicals dosing plant, superconduction Magneto separate Machine and magnetizing mediums reclaimer;Wherein, the import of the collecting tank is connected with leachates reflux pump one outlet end, described to collect Tank outlet is connected with the import of blending tank;The blending tank outlet separates tank body inlet with superconducting magnetic and is connected, the blending tank Magnetizing mediums dispensing port is provided with above, the magnetizing mediums dispensing port is connected with the magnetic kind chemicals dosing plant port of export, the magnetic kind dosing dress The consumption supplement for magnetic kind in Magneto separate mixing tank body is put, the magnetic kind includes iron powder, ferroferric oxide powder and its chemistry At least one of improved ferroferric oxide nano particle, the chemical modification is using the organic polymer modification with special groups Ferroferric oxide nano granules, enhancing ferroso-ferric oxide and heavy metal ion conjugation, the special groups include amino, carboxylic At least one of base, hydroxyl and sulfydryl, the organic polymer include acrylic acid, chitosan, glycine betaine, polypyrrole, polyphenyl Second is dilute, oleic acid, dopamine, polyvinyl alcohol, POLYPROPYLENE GLYCOL, starch, vinyl acetate, polystyrene, polyethylene pyrrole network alkanone, silicon At least one of acetoacetic ester etc.;The superconduction magnetic separator includes superconducting magnet, metal link network, Magneto separate tank body, refrigeration machine And system control cabinet, the superconductor can dismantle, be replaced by cryogenic magnet or high-temperature superconducting magnet, the superconducting magnet Predetermined high-gradient magnetic field is provided inside to superconduction separator;The metal link network is located at the Magneto separate tank body of high-gradient magnetic field In, the magnetic kind of heavy metal is adsorbed with constantly as metal link network rotational band goes out Magneto separate tank body;Set on the Magneto separate tank body Inlet, overfall, mud discharging mouth and two air pressure-vaccum horn mouths, the inlet and overfall are located at the metallic bond respectively The both sides of net, mud discharging mouth be located at be located at Magneto separate tank base, wherein, the overfall respectively with collecting tank and mixing pit phase Even, mud discharging mouth is connected by sludge pump with mudpan, and the horn mouth one is malleation, and another is negative pressure;The magnetic Dielectric film filter equipment includes cyclone separator and vavuum pump, and the negative pressure horn mouth is connected with several cyclonic separations in parallel Device, the vacuum pump discharges end is connected with malleation horn mouth.
Wherein, sludge settling dewatering unit includes mixing pit, mudpan, sludge dewatering equipment, the water storage being sequentially connected Pond and storage mud groove;Wherein, the mixing pit inlet is connected with Magneto separate tank body overfall, the mixing pit and superconduction Magneto separate Connecting pipe is provided with ball valve and sample tap between machine, and the mixing pit is connected with flocculant and flocculation aid chemicals dosing plant respectively, The flocculant and flocculation aid are quantitatively added by measuring pump, and the mixing pit port of export is connected with mudpan entrance point; Sludge pump is equipped with pipeline between mudpan entrance point and Magneto separate tank body the mud discharging mouth end, in superconduction magnetic separator The bed mud of precipitation is delivered in mudpan through pump, and the mudpan overfall is connected with tank, and the sludge sinks Base sludge in the pond of shallow lake is delivered to sludge dewatering equipment through sludge pump;The sludge dewatering equipment is plate and frame filter press, the sheet frame Filter press mud discharging mouth is connected with storage mud groove, and the plate and frame filter press leakage fluid dram is connected with tank.
The course of work of the present embodiment is as follows:
1st, Soil leaching
Heavy-metal contaminated soil is fed in eluting column 2 through belt feeding machine 1, the elution through eluent dope measuring pump P3 Agent stoste and water enter from tank 17 and eluent storage tank 5 mixed in elution thinning tank in proportion respectively, prepare Low concentration eluent, low concentration eluent is entered in eluting column 2 through spray pump P2 and spray flow meter V1, is flowed through heavy metal-polluted The leachates that dye soil reaches the bottom of eluting column 2 are collected through leachates recovery pond 3, when leachates recovery pond 3 is in low liquid level, Spray pump P2 works always to close up to leachates recovery pond 3 reaches after high level, now reflux pump P1 and return flow solenoid valve F1 Open, leachates enter circulated sprinkling process, when leachates heavy metal concentration is exceeded in leachates recovery pond 3, flow back electromagnetism Valve F1 is closed, and discharge solenoid valve F2 is opened, and leachates are transported in collecting tank 6, when the liquid level of leachates recovery pond 3 is reduced to During low liquid level, reflux pump P1 and discharge solenoid valve F2 are closed, spray pump unlatching work, into next round Sprayer Circulation process, warp The percutaneous band discharging machine 1 of clean soil after the processing of eluting column 2 is delivered to sludge stockyard.
2nd, leachates heavy metal superconduction Magneto separate
The leachates collected in collecting tank 6 are quantitatively transferred in blending tank 7 through intake pump P4, according to water quality and water, magnetic Kind chemicals dosing plant 8 is quantitatively adding magnetic kind and leachates are stirred mixing, and the leachates for being mixed with magnetic kind are conveyed through dredge pump P5 Into superconduction magnetic separator 9, through superconducting magnetic centrifugation, the magnetic kind for being adsorbed with heavy metal is attracted to and is built in superconduction Magneto separate The metallic bond of machine 9 is online, the magnetic kind of Adsorption of Heavy Metals is taken out of liquid level by the rotation of metal link network, and then vavuum pump P6 takes out The recovery that magnetic kind is brought into and enters magnetic kind in cyclone separator 10 is inhaled and purges, the magnetic kind of recovery rejoins blending tank 7 Supernatant that is middle to be recycled, being discharged through overfall in superconduction magnetic separator 9, ball valve F3 is opened if heavy metal is not up to standard And ball valve F4 is closed, supernatant is back to collecting tank 6 and handled again, and F3 is closed if processing is up to standard and ball valve F4 is opened, on Clear liquid is delivered in mixing pit 13.
3rd, sludge settling is dehydrated
According to the water of mixing pit 13, flocculant chemicals dosing plant 11 and flocculation aid chemicals dosing plant 12 are respectively into mixing pit 13 Flocculant and flocculation aid are quantitatively adding, mixed liquor and the discharge of the mud discharging mouth of superconduction magnetic separator 9 of flocculant and flocculation aid is mixed with Sludge is together transported in mudpan 14 supernatant in progress sludge settling separation, mudpan 14 through sludge pump P7 It is flowed into tank 17, base sludge is delivered to sludge dewatering equipment 15 through sludge pump P8 and carries out dewatering and filtering mud, generation Water is discharged into tank 17 and reclaimed, and the sludge of generation is stored in storage mud groove 16, and the water in tank 17 is through reuse water pump P9 and blending water flowmeter V2 are quantitatively transferred in elution thinning tank 4 and carry out eluent thinned water.
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 (6)

1. a kind of heavy-metal contaminated soil leachates processing equipment, it is characterised in that including:The washing unit that is sequentially connected, again Metallic magnetic separative element, precipitation dewatering unit;
Wherein, the washing unit is specifically included:
Soil leaching tower (2), its inlet is connected by spray pump P2 with elution thinning tank (4), and its liquid outlet is returned with leachates Receives pond (3) is connected;The elution thinning tank (4) is connected by eluent dope measuring pump P3 with eluent storage tank (5);It is described to drench Go out liquid recovery pond (3) and be connected with the import that Soil leaching tower exports (2) and collecting tank (6);
The heavy metal Magneto separate unit is specifically included:
Blending tank (7), its import is connected with the outlet of collecting tank (6), and its outlet is connected with superconduction magnetic separator (9) inlet, The magnetizing mediums dispensing port being connected with magnetic kind chemicals dosing plant (8) port of export is set above the blending tank (7);Superconduction magnetic separator (9) magnetizing mediums reclaims outlet and is connected by cyclone separator (10) with magnetizing mediums dispensing port;
The precipitation dewatering unit is specifically included:
Mixing pit (13), mudpan (14), sludge dewatering equipment (15), tank (17) and the storage mud groove being sequentially connected (16);Wherein, mixing pit (13) inlet is connected with the overfall of superconduction magnetic separator (9);The mixing pit (13) Import is connected by flocculant chemicals dosing plant (11), flocculation aid chemicals dosing plant (12).
2. a kind of heavy-metal contaminated soil leachates processing equipment according to claim 1, it is characterised in that described to drench Installation reflux pump P1, institute on liquid level gauge, leachates recovery pond (3) bottom reflux line are installed inside liquid recovery pond (3) State reflux pump P1 by return flow solenoid valve F1 with Soil leaching tower (2) import to be connected, the reflux pump P1 passes through discharge solenoid valve F2 is connected with collecting tank (6).
3. a kind of heavy-metal contaminated soil leachates processing equipment according to claim 1, it is characterised in that the superconduction Inlet, overfall, mud discharging mouth and two air pressure-vaccum horn mouths, the inlet and overfall are set in magnetic separator (9) Internally positioned metal link network both sides respectively, mud discharging mouth is located at Magneto separate tank base, wherein, the overfall respectively with collecting tank It is connected with mixing pit, mud discharging mouth is connected by sludge pump with mudpan, the horn mouth one is malleation, and another is negative Pressure.
4. a kind of heavy-metal contaminated soil leachates processing equipment according to claim 1, it is characterised in that the sludge Sludge pump is equipped with pipeline between sedimentation basin (14) entrance point and superconduction magnetic separator (9) mud discharging mouth end;The sludge settling Pond (14) overfall is connected with tank (17), and the base sludge in the mudpan (14) is delivered to dirt through sludge pump P7 Mud dewaterer (15);The sludge dewatering equipment (15) is plate and frame filter press, the plate and frame filter press mud discharging mouth and storage mud groove (16) It is connected, the plate and frame filter press leakage fluid dram is connected with tank (17).
5. a kind of method that heavy-metal contaminated soil leachates processing is carried out using the said equipment, it is characterised in that including:
Soil leaching step, Soil leaching tower, eluent stoste and water are delivered to by heavy-metal contaminated soil through belt conveyor Quantitative being flowed into elution thinning tank is mixed from eluent storage tank and tank respectively, the eluent after dilution is well mixed By flowmeter and spray pump it is quantitative be input to eluting column, heavy metal pollution is uniformly sprayed onto by eluting column spray system On soil, then heavy metal in soil is transferred to from the soil of solid phase and drenches by desorption, anti-complexing and dissolution In liquid, leachates are from elution tower bottom is flowed into leachates recovery pond, and the clean soil of processing is delivered to soil through belt feeder Stack field;
Superconducting magnetic separating step, after heavy metals exceeding standard leachates are delivered into collecting tank through leachates reflux pump, passes through sewage pump It is quantitative to input to blending tank;According to mixing tank body reclaimed water matter requirement, magnetic medium, magnetic are quantitatively provided by magnetic kind chemicals dosing plant Medium is sufficiently mixed under the stirring of stirring system with leachates;The leachates for being mixed with magnetic medium are conveyed by sewage pump It is rotatable built in superconduction magnetic separator under the high-gradient intense magnetic field effect that superconductor is produced into superconduction magnetic separator Metal link network takes the magnetic medium for being adsorbed with heavy metal out of liquid level, then using sky blow the trumpet mouth by magnetic medium from metallic bond Online blowout, and progress solid and gas separation in cyclone separator is entered, obtained solid powder rejoins in blending tank Row is recycled;Non magnetic bulky grain thing in leachates is deposited to superconduction magnetic separator bottom, and periodically sediment exclusion, works as place When leachates heavy metal concentration after reason is exceeded, leachates are back in collecting tank again, otherwise are flowed into mixing pit;
Sludge settling dehydration, flocculant is quantitatively adding into mixing pit and flocculation aid is mixed, mixed water And the bed mud discharged in superconduction magnetic separator enters progress precipitation separation in mudpan, upper water enters tank In, lower floor's mud enters plate and frame filter press through sludge pump, and by press filtration into mud cake after sludge dewatering, the moisture of generation is flowed into storage In pond, the water in tank is flowed to through blowback to be recycled in eluent storage tank.
6. a kind of method that heavy-metal contaminated soil leachates processing is carried out using the said equipment according to claim 5, Characterized in that, in the Soil leaching step, when liquid level is relatively low in leachates recovery pond, spray pump is opened and reflux pump is closed Close, eluent is constantly sprayed onto on soil from thinning tank, the eluent for carrying heavy metal enters leachates recovery pond In, cause liquid level in pond constantly to raise, when liquid level reaches liquid level gauge setting height, spray pump is closed and reflux pump and backflow electricity Magnet valve unlatching work;With the increase of reflow's cycle, heavy metal concentration in leachates is caused to raise, when heavy metal concentration exceedes phase During the standard of pass, return flow solenoid valve is closed and discharge solenoid valve is opened, and heavy metals exceeding standard leachates are delivered to superconducting magnetic through reflux pump Separative element is handled, and as leachates are constantly reduced in recovery pond, liquid level is constantly reduced in recovery pond, when liquid level is less than liquid During the standard of position meter setting, system is circulated into next round.
CN201710176858.7A 2017-03-23 2017-03-23 A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method Pending CN106986429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710176858.7A CN106986429A (en) 2017-03-23 2017-03-23 A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710176858.7A CN106986429A (en) 2017-03-23 2017-03-23 A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method

Publications (1)

Publication Number Publication Date
CN106986429A true CN106986429A (en) 2017-07-28

Family

ID=59412403

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710176858.7A Pending CN106986429A (en) 2017-03-23 2017-03-23 A kind of heavy-metal contaminated soil leachates processing equipment and sewage water treatment method

Country Status (1)

Country Link
CN (1) CN106986429A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030068202A1 (en) * 2001-10-03 2003-04-10 Lin Hsing Kuang Heap and in-situ remediation of contaminated soil using metallic iron and hydrogen peroxide
CN102601106A (en) * 2012-03-08 2012-07-25 中国科学院过程工程研究所 Ectopic leaching restoring device and restoring method for chromic slag polluted soil
CN105964670A (en) * 2016-07-05 2016-09-28 湖南艾布鲁环保科技有限公司 Device and method for recycling ex-site chemical elution-remediating eluate for heavy metal contaminated soil
CN106186221A (en) * 2016-10-07 2016-12-07 玉灵华科技有限公司 Metal handling apparatus in a kind of sewage and method
CN106219694A (en) * 2016-10-07 2016-12-14 玉灵华科技有限公司 A kind of sewage water treatment method and system
CN106277233A (en) * 2016-10-07 2017-01-04 玉灵华科技有限公司 A kind of superconduction sewage-treatment plant and method
CN205914514U (en) * 2016-07-05 2017-02-01 湖南艾布鲁环保科技有限公司 Integrated equipment of chemical drip washing of heavy metal pollution place soil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030068202A1 (en) * 2001-10-03 2003-04-10 Lin Hsing Kuang Heap and in-situ remediation of contaminated soil using metallic iron and hydrogen peroxide
CN102601106A (en) * 2012-03-08 2012-07-25 中国科学院过程工程研究所 Ectopic leaching restoring device and restoring method for chromic slag polluted soil
CN105964670A (en) * 2016-07-05 2016-09-28 湖南艾布鲁环保科技有限公司 Device and method for recycling ex-site chemical elution-remediating eluate for heavy metal contaminated soil
CN205914514U (en) * 2016-07-05 2017-02-01 湖南艾布鲁环保科技有限公司 Integrated equipment of chemical drip washing of heavy metal pollution place soil
CN106186221A (en) * 2016-10-07 2016-12-07 玉灵华科技有限公司 Metal handling apparatus in a kind of sewage and method
CN106219694A (en) * 2016-10-07 2016-12-14 玉灵华科技有限公司 A kind of sewage water treatment method and system
CN106277233A (en) * 2016-10-07 2017-01-04 玉灵华科技有限公司 A kind of superconduction sewage-treatment plant and method

Similar Documents

Publication Publication Date Title
US7666318B1 (en) Process, method and system for removing mercury from fluids
CN104475441B (en) A kind of Soil leaching repair system and method thereof concentrating design concept based on decrement
CN103722005B (en) A kind of chemical leaching system processing heavy metal-polluted soil, organic contamination
AU2005266851B2 (en) Plug-flow regeneration process
CN103861867B (en) A kind of elution method soil remediation technique
CN102674524B (en) Copper recovery apparatus and copper recovery method
CN100567186C (en) A kind of garbage leachate treatment process
WO1995030471A1 (en) Liquid treatment method and system
CN202358976U (en) Glass wastewater treatment equipment
CN106825018A (en) A kind of composite chemical ELUTION METHOD of efficient restoration of soil polluted by heavy metal
CN201433144Y (en) Desulfurization waste water treatment recycling device
CN104310657A (en) Multistage settling and garden sewage regenerating system
CN105772497A (en) Soil ectopic leaching restoring complete equipment
CN1968902A (en) Method and apparatus for treating organic drainage and sludge
CN105170630B (en) A kind of method and apparatus of combined type soil washing desorption
CN102503030B (en) System for treating heavy metal wastewater
CN101798166B (en) Device and method for magnetic separation of underwater sludge
CN101380526A (en) Method and system for removing pollutant from fluid
CN101570377A (en) Processing method of waste water containing heavy metal and dye
CN107739136B (en) A kind of ecology sludge treatment device
CN208541851U (en) A kind of filter device of rare earth processing waste water
CN104944709A (en) Electroplating wastewater zero-discharge treatment method and system
CN104788002B (en) A kind of sludge pretreatment equipment
CN102167490A (en) Integrated treatment method for thickening, drying and purifying municipal sludge
CN101041491A (en) Method for treating industrial wastewater / sewage by two-stage magnetic isolation technique

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170728