CN207271800U - The chemical leaching piece-rate system of pollutant in high concentration, complete circulation type soil, solid waste - Google Patents

The chemical leaching piece-rate system of pollutant in high concentration, complete circulation type soil, solid waste Download PDF

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CN207271800U
CN207271800U CN201721046294.7U CN201721046294U CN207271800U CN 207271800 U CN207271800 U CN 207271800U CN 201721046294 U CN201721046294 U CN 201721046294U CN 207271800 U CN207271800 U CN 207271800U
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pollutant
chemical leaching
soil
rinsing
solid
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CN201721046294.7U
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张晨
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张晨
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Abstract

The utility model provides a kind of high concentration,Complete circulation type soil,The chemical leaching piece-rate system of pollutant in solid waste,By chemical leaching device,Conveying device and equipment for separating liquid from solid form chemical leaching system,Countercurrent rinsing system is formed with countercurrent rinsing device,Regeneration cycle system is formed with reverse osmosis unit and pollutant extraction element,Wherein,Chemical leaching system makes soil,Pollutant in solid waste is dissolved in leacheate as solute,Soil after countercurrent rinsing system will elute,It is mingled with the pollutant in solution as solute in solid waste to come out by rinsing liquid aliquot replacement,Until soil,Be mingled with solid waste solution pollutant concentration be equal to management goal concentration after discharged,Reach improvement to require,And the detection signal control dynamic that regeneration cycle system is exported by concentration detector and volume detector starts,The constant concentration of pollutant in the volume and leacheate of holding leacheate,To realize stable circulation.

Description

The chemical leaching separation of pollutant in high concentration, complete circulation type soil, solid waste System
Technical field
The utility model, which discloses, is related to soil, the technical field of solid waste pollution improvement, more particularly to a kind of high concentration, The chemical leaching piece-rate system of complete circulation type soil pollutant.
Background technology
At present, when carrying out soil pollutant improvement, generally use chemical leaching piece-rate system carries out soil or solid gives up Pollutant chemistry elution is with separating in thing.The system is mainly by the leacheate containing eluent and pending soil or solid Waste is in contact, and the eluent in the pollutant and leacheate in material is interacted, by desorbing, chelating, being complexed, dissolving Or physics, the chemical process such as extraction, pollutant is transferred in leacheate, to realize the net of the materials such as soil or solid waste Change.
However, using existing chemical leaching system when carrying out soil, solid waste pollution being administered, generally existing is secondary Pollutional load is serious and the problems such as operating cost is excessive, causes it to be promoted and transported on a large scale in engineering field With.Such as:Certain dry weight is the soil of 10t, its pollutant lead content is 1000mg/kg, and repairing target is made in soil Lead content is reduced to below 150mg/kg;The actual moisture content of the soil is 21% (for the matter of moisture content of drying base, i.e. water and arid soil Ratio is measured, similarly hereinafter), the saturated aqueous rate of this kind of soil is 52%, after saturated aqueous soil uses economically viable dewatering means, Its moisture content can drop to 30%.To realize the reparation target, the improvement for taking existing chemical leaching method to be polluted, specifically For:Concentration is used to carry out chemical leaching for bis- sodium solutions of EDTA- of 0.01~0.1mol/L, by the chelatropic reaction of 1h or so Afterwards, the efficiency that the lead that soil Central Plains is present in solid phase is eluted enters liquid up to 90% in the form of the solute of lead chelate Phase.In existing chemical leaching system, liquid-solid ratio parameter (ratio of leacheate quality and soil quality), for final process effect And waste water yield has decisive impact, to ensure treatment effect, the liquid-solid ratio generally selected in existing chemical leaching system For 2~10 (liquid and solid masses ratios), therefore, we are respectively 2.0,2.85 according to liquid-solid ratio and 5.4 3 kind of situation is Example, to analyze the production of existing chemical leaching system waste water when carrying out chemical leaching:
1) when selection liquid-solid ratio for 2.0 when:
It is 20m that volume is added into soil3, concentration be 0.01~0.1mol/L bis- sodium solutions of EDTA- carry out chemistry Elution, after the chelatropic reaction of 1h, efficiency that the lead in soil is eluted is 90%, the lead total amount into leacheate is 9kg, Concentration is 450mg/L;Separation of solid and liquid is carried out to the soil after chemical leaching, soil moisture content is 30% after separation, and water content is 3m3, separation process formation lead content 7.65kg, the eluate 17m of concentration 450mg/L3;It is remaining solid in soil after separation of solid and liquid Phase, not elute lead quality be 1kg, and 3m is remained in soil3Leacheate in Chelating state lead quality be 1.35kg, in solid phase, liquid phase Total lead quality is 2.35kg, and in terms of soil dry weight 10t, its total lead content is 235mg/kg, and not up to 150mg/kg's repaiies Complicated target, it is therefore necessary to be at least introduced back into 5.1m into the soil after chemical leaching33 clear water rinses it, after rinsing again Secondary separation of solid and liquid to soil moisture content is 30%, and lead quality is down to 0.5kg in liquid phase of soil at this time, total lead in solid phase, liquid phase Quality is down to 1.5kg, reaches the reparation target of 150mg/kg, while the Chelating state lead for having 0.85kg enters the wash-off of rinse cycle In liquid, the eluate 5.1m of lead concentration 166.67mg/L is formed3.To sum up, when using liquid-solid ratio for 2.0, lead concentration will be produced The eluate 17m of 450mg/L3, lead concentration 166.67mg/L eluate 5.1m3, amount to eluate wastewater flow rate 22.1m3.It is above-mentioned If waste water is re-used for the similar soil chemistry elution of other batches, the remaining solution pollutant of institute is dense in soil after elution Degree will increase further, and be rinsed to realize that management goal must be introduced into more clear water, and produces more wash therefrom Go out liquid, therefore, the multiplexing of above-mentioned waste water is difficult to realize substantially reduce the purpose of wastewater flow rate.
2) when selection liquid-solid ratio for 4.0 when:
It is 40m that volume is added into soil3, concentration be 0.01~0.1mol/L bis- sodium solutions of EDTA- carry out chemistry Elution, after the chelatropic reaction of 1h, efficiency that the lead in soil is eluted is 90%, the lead total amount into leacheate is 9kg, Concentration is 225mg/L;Separation of solid and liquid is carried out to the soil after chemical leaching, soil moisture content is 30% after separation, and water content is 3m3, separation process formation lead content 8.325kg, the eluate 37m of concentration 225mg/L3;It is remaining in soil after separation of solid and liquid Solid phase, not elute lead quality be 1kg, and 3m is remained in soil3Leacheate in Chelating state lead quality be 0.675kg, solid phase, liquid phase In total lead quality be 1.675kg, in terms of soil dry weight 10t, its total lead content is 167.5mg/kg, not up to 150mg/kg Reparation target, it is therefore necessary to be at least introduced back into 1.05m into the soil after chemical leaching3Clear water it is rinsed, rinse Separation of solid and liquid to soil moisture content is 30% again afterwards, and lead quality is down to 0.5kg in liquid phase of soil at this time, total in solid phase, liquid phase Lead quality be down to 1.5kg, reach the reparation target of 150mg/kg, while the Chelating state lead for having 0.175kg enters rinse cycle Eluate in, form the eluate 1.05m of lead concentration 166.67mg/L3.To sum up, when using liquid-solid ratio for 4.0, will produce The eluate 37m of lead concentration 225mg/L3, lead concentration 166.67mg/L eluate 1.05m3, amount to eluate wastewater flow rate 38.05m3
3) when selection liquid-solid ratio for 5.4 when:
It is 54m that volume is added into soil3, concentration be 0.01~0.1mol/L bis- sodium solutions of EDTA- carry out chemistry Elution, after the chelatropic reaction of 1h, efficiency that the lead in soil is eluted is 90%, the lead total amount into leacheate is 9kg, Concentration is 166.667mg/L;Separation of solid and liquid is carried out to the soil after chemical leaching, soil moisture content is 30% after separation, aqueous Measure as 3m3, separation process formation lead content 8.5kg, the eluate 51m of concentration 166.667mg/L3;After separation of solid and liquid, in soil Remaining solid phase, not elute lead quality be 1kg, and 3m is remained in soil3Leacheate in Chelating state lead quality be 0.5kg, solid phase, Total lead quality is 1.5kg in liquid phase, and in terms of soil dry weight 10t, its total lead content is 150mg/kg, reaches 150mg/kg's Repair target.To sum up, when using liquid-solid ratio for 5.4, the eluate wastewater flow rate of lead concentration 166.667mg/L will be produced by amounting to 51m3
To sum up, although existing chemical leaching system can realize the improvement of pollutant in soil, can be produced in governance process The raw largely waste water containing low concentration pollutant, if these waste water discharged, is bound to cause serious secondary pollution;If These substantial amounts of low concentration wastewaters are administered, then can produce high operating cost, economically will be difficult to bear again.
Therefore, the chemical leaching separation used during pollutant control in a kind of new soil and solid waste how is researched and developed System, to solve the above problems, becomes people's urgent problem to be solved.
Utility model content
In consideration of it, the utility model, which discloses, provides pollutant in a kind of high concentration, complete circulation type soil, solid waste Chemical leaching piece-rate system, to solve conventional chemical leaching system when carrying out soil, solid waste pollution being administered, generally existing Secondary pollution load it is serious and the problems such as operating cost is excessive.
Technical solution provided by the utility model, specifically, a kind of high concentration, the chemistry of complete circulation type pollutant in soil Piece-rate system is eluted, the system is suitable for above-mentioned chemical leaching separation method, which includes:Conveying device 2, solid-liquid point From device 3, countercurrent rinsing device 4, reverse osmosis unit 5, pollutant extraction element 6 and chemical leaching for holding leacheate Device 1;
It is separately provided for detecting the Concentration Testing of pollutant concentration in the leacheate in the chemical leaching device 1 Device 11 and the volume detector 12 for detecting the leacheate volume, the solid output terminal of the chemical leaching device 1 and institute State the input terminal connection of conveying device 2;
The output terminal of the conveying device 2 is connected with the input terminal of the equipment for separating liquid from solid 3;
The solid output terminal of the equipment for separating liquid from solid 3 passes through pipeline 7 and the solid input terminal of the countercurrent rinsing device 4 Connection, and valve 71 is provided with the pipeline 7, fluid output port and the chemical leaching of the equipment for separating liquid from solid 3 fill Put 1 fluid input port connection;
The infiltration with fresh water source and the reverse osmosis unit 5 respectively of the fluid input port of the countercurrent rinsing device 4 Liquid output terminal connects, and the fluid output port of the countercurrent rinsing device 4 and the fluid input port of the chemical leaching device 1 connect Connect;
The input terminal of the reverse osmosis unit 5 is connected with the fluid output port of the chemical leaching device 1, described reverse osmosis The concentrated solution output terminal of device 5 is connected with the fluid input port of the chemical leaching device 1;
The input terminal of the pollutant extraction element 6 is connected with the fluid output port of the chemical leaching device 1, the dirt The fluid output port of dye thing extraction element 6 is connected with the fluid input port of the chemical leaching device 1;
Wherein, the output terminal of the concentration detector 11 is connected with the control terminal of the pollutant extraction element 6, the body The output terminal of product detector 12 is connected with the control terminal of the reverse osmosis unit 5.
It is preferred that the countercurrent rinsing device 4 is made of multiple countercurrent rinsing branches 41 being arranged in parallel successively, and it is each inverse Rinsing device 411 and the temporary storage tank 412 of eluate are respectively arranged with stream rinsing branch 41;
Wherein, the solid input terminal of the rinsing device 411 passes through pipeline 7 and the solid output terminal of equipment for separating liquid from solid 3 Connection, and is provided with valve 71 on the pipeline 7, the fluid input port of the rinsing device 411 respectively with fresh water source and The penetrating fluid output terminal connection of the reverse osmosis unit 5, fluid output port and the eluate of the rinsing device 411 are temporarily stored up The input terminal connection of tank 412;
The output terminal of the temporary storage tank 412 of eluate respectively with the fluid input port of the chemical leaching device 1 and under The fluid input port connection of rinsing device 411 in one countercurrent rinsing branch 41.
Further preferably, the rinsing device 411 is filter-pressing device;
Further preferably, the rinsing device 411 includes housing 4111, rotating cabin 4112, the first motor 4113, rabble 4114 and second motor 4115;
Through hole is arranged at intervals with the rotating cabin 4112, the rotation of rotating cabin 4112 is installed in the housing 4111 Portion;
The output terminal of first motor 4113 and the upper end of the rabble 4114 are drivingly connected, the rabble 4114 Lower end be inserted in the inside of the rotating cabin 4112;
The drive end of second motor 4115 is drivingly connected with the rotating cabin 4112.
Further preferably, the output terminal of the temporary storage tank 412 of the eluate also input terminal with the reverse osmosis unit 5 respectively Connected with the input terminal of the pollutant extraction element 6.
Further preferably, input of the concentrated solution output terminal of the reverse osmosis unit 5 also with the pollutant extraction element 6 End connection.
Further preferably, the pollutant extraction element 6 is electrodialysis plant or extraction equipment.
The chemical leaching segregative line of pollutant in high concentration provided by the utility model, complete circulation type soil, solid waste System, the chemical leaching piece-rate system is by chemical leaching device, conveying device and the equipment for separating liquid from solid for holding leacheate Chemical leaching system is formed, countercurrent rinsing system is formed with countercurrent rinsing device, with reverse osmosis unit and pollutant extraction dress Put and form regeneration cycle system, wherein, using in high concentration leacheate and soil, solid waste first in chemical leaching system Pollutant react, the pollutant in soil, solid waste is dissolved in as solute in leacheate, then again by adverse current Rinse-system goes out the pollutant being mingled with soil, solid waste after elution in solution as solute by rinsing liquid aliquot replacement Come, until the pollutant concentration for being mingled with solution in soil, solid waste is discharged after being equal to management goal concentration, reach improvement It is required that.And regeneration cycle system is in the course of work of chemical leaching system and countercurrent rinsing system, by concentration detector with And the detection signal control dynamic of volume detector output starts, and by the startup of the regeneration cycle system, can make soil, solid Waste keeps the volume of leacheate and the constant concentration of pollutant in leacheate, with reality during whole pollutant process Existing stable circulation.Chemical leaching piece-rate system provided by the utility model, is drenched by holding high concentration in chemical leaching device Washing lotion, on the one hand can be converted into solute by the pollutant in soil, solid waste and be dissolved in leacheate, and convenient follow-up adverse current is floated Wash the progress of countercurrent rinsing in system;On the other hand, pollutant in soil, solid waste is removed for any stable operation For system, the pollutant gross mass removed in its unit interval is steady state value, therefore, flows through in regeneration cycle system and carries out Solution pollutant concentration, liquid inventory, the product of pollutants removal rate three of pollutant extraction are steady state value, discounting for The difference of removal efficiency, then solution concentration and liquid inventory are in inversely prroportional relationship.The requires of the utility model is delivered to pollutant and carries The chemical leaching liquid of device, reverse osmosis concentrated solution are taken, its pollutant concentration is at least the soil, solid waste after administering In be mingled with N times of pollutant concentration of solution, and N >=2, its principle are to be delivered to pollutant extraction dress by significantly being lifted Pollutant concentration is to a certain high concentration value in the solution put so that pollutant extracts amount of solution to be treated and accordingly significantly subtracts It is few.In addition, pollutant concentration value usually has actively for improving the treatment effeciency of pollutant extraction in raising solution Effect, can correspondingly cause pollutant to extract amount of solution to be treated and further reduce.In addition, using in the utility model Chemical leaching piece-rate system to need the amount of solution of pollutant extraction process to be greatly decreased, therefore, it is possible to avoid low concentration from giving up Largely outer row, the corresponding loss amount for causing chemical leaching are greatly decreased water.
High concentration provided by the utility model, the chemical leaching piece-rate system of complete circulation type pollutant in soil, have knot Structure is simple, and design is reasonable, it is easy to use the advantages that.
Brief description of the drawings
Attached drawing herein is merged in specification and forms the part of this specification, shows and meets the utility model Embodiment, and be used to together with specification to explain the principle of the utility model.
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, for ordinary skill people For member, without creative efforts, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is that the utility model discloses a kind of high concentration of embodiment offer, the chemistry of complete circulation type pollutant in soil The structure diagram of piece-rate system is eluted, wherein, 8 represent that slag, local product hopper, 9 represent supplement eluent;
Fig. 2 is that the utility model discloses a kind of high concentration of embodiment offer, the chemistry of complete circulation type pollutant in soil The structure diagram of piece-rate system is eluted, wherein, 8 represent that slag, local product hopper, 9 represent supplement eluent;
Fig. 3 is to disclose a kind of high concentration of embodiment offer, complete circulation type soil, in solid waste using the utility model Pollutant chemistry elutes the workflow schematic diagram of piece-rate system.
Embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Following description is related to During attached drawing, unless otherwise indicated, the same numbers in different attached drawings represent the same or similar key element.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with the utility model.On the contrary, they be only with such as The example of the consistent device of some aspects be described in detail in the appended claims, the utility model.
Due to the chemical leaching system used in the prior art, during soil renewal or Solid Waste Treatment, generally The phenomenon big in the presence of wastewater flow rate is produced, therefore problems with can be produced:1) generation of a large amount of waste water, waste liquid will increase by two secondary environments The risk of pollution;If 2) carry out purification treatment to caused a large amount of waste water, waste liquid, its high waste water treatment cost is passing through It is probably to be difficult to what is born in Ji;3) since waste water, waste liquid amount are larger, and elution agent concentration contained therein is usually relatively low, therefore So that the target for recycling eluent is technically difficult to realize, and if do not recycle eluent, and operating cost will be increased; 4) since waste water, waste liquid amount are larger, and pollutant concentration contained therein is usually relatively low, hence in so that the recycling recycling of pollutant Using being technically difficult to realize;5) technical process causes water resources consumption excessive, is difficult to bear for arid area.
High concentration that the present embodiment provides, complete circulation type soil, in solid waste pollutant chemical leaching segregative line System, intend by significantly cut down technique waste water yield, the problem of above-mentioned associated is resolved at the same time, and make soil renewal or The financial cost of Solid Waste Treatment is significantly cut down.
Change referring to Fig. 1 for pollutant in a kind of high concentration of the present embodiment offer, complete circulation type soil, solid waste Learn elution piece-rate system, the system mainly by conveying device 2, equipment for separating liquid from solid 3, countercurrent rinsing device 4, reverse osmosis unit 5, Pollutant extraction element 6 and the chemical leaching device 1 for holding leacheate form;Wherein, in chemical leaching device 1 respectively It is provided with the concentration detector 11 for detecting pollutant concentration in leacheate and the volume for detecting leacheate volume detects Device 12, the solid output terminal of chemical leaching device 1 are connected with the input terminal of conveying device 2, the output terminal and solid-liquid of conveying device 2 The input terminal connection of separator 3, the solid output terminal of equipment for separating liquid from solid 3 pass through pipeline 7 and the solid of countercurrent rinsing device 4 Input terminal connects, and valve 71 is provided with pipeline 7, the fluid output port of equipment for separating liquid from solid 3 and the liquid of chemical leaching device 1 Body input terminal connects, and the fluid input port of countercurrent rinsing device 4 is defeated with the penetrating fluid at fresh water source and reverse osmosis unit 5 respectively Outlet connects, and the fluid output port of countercurrent rinsing device 4 is connected with the fluid input port of chemical leaching device 1, reverse osmosis unit 5 Input terminal be connected with the fluid output port of chemical leaching device 1, the concentrated solution output terminal of reverse osmosis unit 5 is filled with chemical leaching 1 fluid input port connection is put, the input terminal of pollutant extraction element 6 is connected with the fluid output port of chemical leaching device 1, dirty The fluid output port of dye thing extraction element 6 is connected with the fluid input port of chemical leaching device 1, the output terminal of concentration detector 11 It is connected with the control terminal of pollutant extraction element 6, the output terminal of volume detector 12 is connected with the control terminal of reverse osmosis unit 5.
The specific work process of above-mentioned piece-rate system is as follows:Pending soil or solid waste is input to chemical leaching dress Chemical leaching is carried out in putting 1, the eluent in the pollutant and leacheate in soil or solid waste is reacted, is dissolved in elution In liquid, partial contamination thing is deposited in leacheate, and partial contamination thing is present in solute and is mixed in soil or solid waste In solution, then the soil after elution or solid waste are transported in equipment for separating liquid from solid 3 by conveying device 2, will be eluted Soil or solid waste afterwards carries out separation of solid and liquid, to reduce the solution content being mingled with soil or solid waste, and then reduces Pollutant load in soil or solid waste, the liquid after separation of solid and liquid is returned in chemical leaching device 1, and separation of solid and liquid Solid afterwards, which is transported in countercurrent rinsing device 4, carries out countercurrent rinsing, to remove remaining pollution in soil or solid waste Thing, until contained pollutant reaches management goal in doped solution in soil or solid waste, wherein, the rinsing after countercurrent rinsing Liquid can be returned to as multiplexing leacheate in chemical leaching device 1, and is respectively arranged with Concentration Testing in chemical leaching device 1 Device 11 and volume detector 12, when the pollutant concentration that concentration detector 11 is detected in chemical leaching device 1 exceedes the perseverance of setting During definite value, start pollutant extraction element 6 and export the part leacheate in chemical leaching device 1, pass through pollutant and extract dress Put 6 and carry out pollution extraction, the leacheate after extraction pollutant is returned in chemical leaching device 1, to realize pollutant concentration Reduction, when the leacheate volume that volume detector 12 is detected in chemical leaching device 1 exceedes the steady state value of setting, start anti- Permeability apparatus 5 exports the part leacheate in chemical leaching device 1, and progress is reverse osmosis, and the concentrated solution of reverse osmosis formation is returned Return in chemical leaching device 1, realize the reduction of leacheate volume in chemical leaching device 1, the penetrating fluid of reverse osmosis formation is Clear water, is sent to countercurrent rinsing device 4 and is used as Fresh rinse solution.
Referring to Fig. 2, the structure design of preferable countercurrent rinsing device 4 in above-mentioned piece-rate system, the countercurrent rinsing device 4 by Multiple countercurrent rinsing branches 41 being arranged in parallel successively are formed, and each countercurrent rinsing branch 41 is respectively arranged with rinsing device 411 and the temporary storage tank 412 of eluate;Wherein, the solid input terminal of rinsing device 411 passes through pipeline 7 and equipment for separating liquid from solid 3 Solid output terminal connects, and valve 71 is provided with the pipeline 7, the fluid input port of rinsing device 411 respectively with fresh water The penetrating fluid output terminal of source and reverse osmosis unit 5 connects, fluid output port and the temporary storage tank 412 of eluate of rinsing device 411 Input terminal connection;The output terminal of the temporary storage tank 412 of eluate respectively with the fluid input port of chemical leaching device 1 and next inverse The fluid input port connection of rinsing device 411 in stream rinsing branch 41.
Wherein, rinsing device 411 can select filter-pressing device, can be mechanism filter-pressing or air press filtration.
Referring to Fig. 2, rinsing device 411 can also select following structure design, wherein, rinsing device 411 is mainly by housing 4111st, rotating cabin 4112, the first motor 4113,4114 and second motor 4115 of rabble are formed, wherein, on rotating cabin 4112 Through hole is arranged at intervals with, the rotation of rotating cabin 4112 is installed on inside housing 4111, the output terminal and rabble of the first motor 4113 4114 upper end is drivingly connected, and the lower end of rabble 4114 is inserted in the inside of rotating cabin 4112, the driving of the second motor 4115 End is drivingly connected with rotating cabin 4112.
The course of work of countercurrent rinsing device 4 is:Equipment for separating liquid from solid 3 by the soil of output or solid waste in batches according to It is secondary into different countercurrent rinsing branches 41, initially entered into the soil in each bar countercurrent rinsing branch 41 or solid waste Rinsed to rinsing device 411, when rinsing device 411 selects filter-pressing device, soil or solid waste are put into filter-pressing device It is interior, it is passed through rinsing liquid and is once rinsed, after rinsing, eluate is press-filtered out by filter-pressing device, and completion once rinses, so It is passed through rinsing liquid for the second time into filter-pressing device again afterwards and carries out secondary rinsing, after rinsing, eluate is by filter-pressing device press filtration Out, secondary rinsing is completed, until soil or solid waste are mingled with the pollutant concentration of solution and reach improvement mesh in filter-pressing device Mark requires, and the soil after rinsing or solid waste are input in finished product apparatus for placing, and is input to washes from filter-pressing device every time The eluate gone out in the temporary storage tank 412 of liquid can be multiple according to being used as in the filter-pressing device that setting is input in next countercurrent rinsing branch 41 By the use of rinsing liquid or back to being used as multiplexing leacheate in chemical leaching device 1;When rinsing device 411 is the structure shown in Fig. 3, It is first into the soil in each bar countercurrent rinsing branch 41 or solid waste in the rotating cabin 4112 of rinsing device 411, And after in rotating cabin being passed through rinsing liquid, start the first motor 4113 driving rabble 4114 and once stirred rinsing, rinsing After stirring rinsing, start the second motor 4413 driving rotating cabin 4112 and rotated relative to housing 4111, carry out solid-liquid point From, complete a rinse cycle, required according to administering, can be repeatedly passed through into rotating cabin rinsing liquid carry out above-mentioned stirring rinsing with And separation of solid and liquid process, until in rotating cabin soil or solid waste be mingled with solution pollutant concentration reach management goal will Ask, the soil after rinsing or solid waste are input in finished product apparatus for placing, and it is defeated from the housing 4111 of rinsing device every time Entering can be according in the filter-pressing device that setting is input in next countercurrent rinsing branch 41 to the eluate in the temporary storage tank 412 of eluate As multiplexing rinsing liquid or back in chemical leaching device 1 as multiplexing leacheate.
Wherein, the output terminal of the temporary storage tank 412 of eluate is also extracted with the input terminal and pollutant of reverse osmosis unit 5 and filled respectively 6 input terminal connection is put, by the structure design, the eluate in the temporary storage tank 412 of eluate not only being returned directly to Learn in elution device 1, but also open can be handled by reverse osmosis unit 5 and pollutant extraction element 6 after return again to leacheate In, as multiplexing leacheate.
The concentrated solution output terminal of reverse osmosis unit 5 can also be connected with the input terminal of pollutant extraction element 6, i.e., by anti- Concentrated solution after the processing of permeability apparatus 5 carries out the extraction of pollutant by pollutant extract extraction element 6 again.
Since the process object of pollutant is different, pollutant extraction element 6 can select no device respectively, such as: When pollutant is heavy metal element, electrodialysis plant can be selected as pollutant extraction element, and when pollutant is organic matter When, extraction element of the extraction equipment as pollutant can be selected.Referring to Fig. 1, pollutant extraction element shown in this Fig is the moon Ion diaphragm electrolysis unit (note:Anion membrane electrolysis unit is one kind of electrodialysis plant), i.e., set in the middle part of electrolytic cell Anion membrane is equipped with, electrolytic cell is divided into cathode pool and anode pool, after leacheate is input in the electrodialysis plant, is carried out Electrolysis, wherein heavy metal ion can be restored in cathode, the indoor chelator anion of cathode due to be subject to anion every The barrier of film can be together with aqueous solution together back to change without destruction, chelator anion are aoxidized, decomposed into anode chamber Learn and be multiplexed in elution device 1, to avoid the loss of chelating agent.
It is to be carried out using the chemical leaching piece-rate system provided in the embodiment above in soil or solid waste referring to Fig. 3 The process flow chart of pollutant process, wherein, 1. high concentration chemistry elution circuit by chemical leaching device, conveying device and is consolidated Liquid separating apparatus is formed, and high concentration chemistry elution circuit receives the things such as the soil to be treated sent by outside, solid waste Expect (stream S), the leacheate in the high concentration chemistry elution circuit contains eluent and pollutant, and so-called high concentration is mainly The levels of finger pollutant are higher, and the pollutant control aimed concn of solution is mingled with the soil, solid waste for N times, should High concentration leacheate derives from fresh leacheate stream C and the multiplexing leacheate in other steps, makes to be treated The materials such as soil, solid waste and leacheate interact, it would be desirable to the dirt in the material such as the soil of processing, solid waste Thing is contaminated as solute dissolving with leacheate, after the material after chemical leaching then is carried out solid and liquid separation, will remove portion Material after liquid separation body is removed in the form of stream A and sent into countercurrent rinsing system;2. countercurrent rinsing system is by countercurrent rinsing Device is formed, and countercurrent rinsing system receives the stream A of high concentration chemistry elution circuit output, by externally input rinsing liquid liquid stream U, makes the two interact, after the material after rinsing then is carried out solid and liquid separation, after removing partially liq Material is removed in the form of stream G (for technological process product), and the eluate for rinsing generation is moved out of to form eluate liquid stream H, The flow portion is all fed directly in the form of liquid stream E be used as multiplexing leacheate in high concentration chemistry elution circuit, remaining Part is liquid stream J, is sent into regeneration cycle system;3. regeneration cycle system, the startup of the regeneration cycle system, mainly according to height The concentration of pollutant is determined in the volume of leacheate and leacheate in concentration chemical leaching system, when pollutant in leacheate When concentration exceedes the constant density set or leacheate volume more than the constant volume set, high concentration chemistry elution circuit will be defeated Go out leacheate liquid stream B or countercurrent rinsing system output eluate liquid stream J, by regeneration cycle system to above-mentioned containing pollutant Stream, which carries out processing chemically or physically, makes its pollutant concentration reduce or reduce the volume of stream, is formed and regenerates leacheate, again Raw rinsing liquid, the pollutant with solution phase separation, regeneration leacheate are delivered to high concentration chemistry elution circuit in the form of liquid stream D It is middle to be used as leacheate reuse, regeneration rinse liquid removed in the form of liquid stream R be completely or partially delivered to after regeneration cycle system it is inverse Rinse-system is flowed as rinsing liquid reuse, is moved to the pollutant of solution phase separation outside system and is formed contaminated material stream P.
Wherein, referring to Fig. 3, high concentration chemistry elution circuit:In certain steady production period T, into high concentration It is M to have quality in the stream S of chemical leaching systemSPollutant X reacted by chemical leaching and eluent, dissolved as solute In leacheate, the solid phase that is formed for lessivation, liquid phase mixture, it is desirable to control in the system pollutant X in liquid phase Mass concentration CXMaintain in a higher scope, specific requirement is:CX=N*C0, in preceding formula:N is the drift of rinse-system Wash efficiency, N=CA/CG, and N >=2 are required, wherein CAThe concentration of pollutant X, C in the solution carried under one's arms by stream AGFor stream G Pollutant X Rong Du, C in the solution carried under one's arms0It is mingled with the pollutant control target rich of solution in soil, solid waste for setting Degree, it should be pointed out that the rinse-system of any one setting, in stable operation, its rinse efficiency N is one fixed Parameter value.
To keep leacheate volume VTConstant, specific control mode is as follows:
In the period T of certain steady production, drenched by controlling in the unit interval into and out high concentration chemistry The solution body accumulated amount for washing system is equal so that total solution amount volume stability is in some fixed value V in the systemT.Into system Solution body accumulated amount include:The solution body accumulated amount V carried under one's arms in stream SS, by regeneration cycle system convey Lai regeneration leacheate liquid Flow the volume V of DD, by countercurrent rinsing system convey Lai eluate liquid stream E volume VE;The solution body accumulated amount of removal system Including:The volume V of the eluate liquid stream B of chemical leaching system outputB, chemical leaching system output stream A in carried under one's arms The volume V of solutionA, technological process, which passes through, to be controlled:VS+VD+VE=VB+VA, then at this time in high concentration chemistry elution circuit Solution body accumulated amount is a certain constant fixed value VT, wherein, VTMaintenance stabilization be using the startup of counter-infiltration system, penetrating fluid What the size of yield was kept.
Concentration C to keep pollutant in leacheateXConstant, specific control mode is as follows:
Leacheate volume is a certain stationary value V in high concentration chemistry elution circuitTUnder conditions of, during by controlling unit It is interior equal into the pollutant X amounts in into and out high concentration chemistry elution circuit liquid phase, you can.When inlet in the unit interval During more than discharge, pollutant X is constantly enriched with leacheate, CXValue increases;When inlet is less than discharge in the unit interval When, total amounts of the pollutant X in leacheate is constantly reduced, CXValue reduces;It is dirty when inlet is equal to discharge in the unit interval Contaminate the concentration Cs of thing X in the solutionXValue keeps stablizing.Pollutant X mass Ms in into system in solutionINIncluding:In stream S The pollutant X amounts of being eluted MS, the pollutant X mass Ms for regenerating leacheate liquid stream D come by the conveying of regeneration cycle systemD, by adverse current The pollutant X mass Ms for the eluate liquid stream E that rinse-system conveying comesE, i.e. MIN=MS+MD+ME;Dirt in the solution of removal system Contaminate thing X mass MsOUTIncluding:Pollutant X mass Ms in the eluate liquid stream B of chemical leaching system outputB, chemical leaching system The pollutant X mass Ms in solution are carried under one's arms in the stream A of outputA, i.e. MOUT=MB+MA.System is in steady operation period, due to this When in chemical leaching system leacheate volume be a certain stationary value VT, by entering in the process control unit interval and The pollutant X amounts flowed out in high concentration chemistry elution circuit solution are equal, i.e., by controlling MIN=MOUTSo that high concentration chemistry The concentration C of pollutant X in elution circuit in solutionXValue stabilization is in N*C0.Work as CXValue appearance is fluctuated and more than N*C0When, pass through Increase the removal rate δ of liquid stream B, the volume flow of liquid stream J or increase regeneration cycle system to pollutant so that have in the unit interval More pollutant X are reproduced circulatory system removal, correspondingly so that MIN< MOUT, C in high concentration chemistry elution circuitXValue drop As low as N*C0;In CXValue constantly reduces and occurs or be likely to occur less than N*C0In the case of, reduce liquid stream B, the volume of liquid stream J Flow reduces removal rate δ of the regeneration cycle system to pollutant so that has less pollutant X to be reproduced in the unit interval and follows Loop system removes, correspondingly so that MIN> MOUT, C in high concentration chemistry elution circuitXValue increases to N*C0
In stable operation stage, since the pollutant X mass removed in unit interval T via regeneration cycle system is definite value MDEL(MDEL=MS-MG, M in formulaGBy being polluted in solution that the stream G of technological process final product, that is, rinse-system output is carried under one's arms Thing X mass), therefore by setting pollutant concentration C in stable operation stage high concentration chemistry elution circuitXFor the N* of higher concentration C0, to reduce regeneration cycle system eluate volume flow to be treated.When regeneration cycle system only receives to come from high concentration During the leacheate liquid stream B of chemical leaching system, the volume V of leacheate liquid stream B in unit interval T is controlledB=MS/(N*C0*δ);When Regeneration cycle system receives the leacheate liquid stream B from high concentration chemistry elution circuit, washing from countercurrent rinsing system at the same time When going out liquid liquid stream J, liquid stream B, the volume of liquid stream J in unit interval T are controlled as the following formula:VB*C0B+VJ*CJJ=MS, (in formula δB、δJRespectively regeneration cycle system is to the pollutant X removal rates in liquid stream B, liquid stream J, CJFor the pollutant X mass in liquid stream J Concentration).
The course of work and method of work of the chemical leaching piece-rate system, thing to be rinsed are illustrated with reference to Fig. 3 Material A in batches, successively respectively enters countercurrent rinsing system, and (Q is big to the Q countercurrent rinsing branch which includes In the natural number equal to 2), the quality of every batch of material A is equal, is removed after rinsing by system, becomes the production of technological process Thing.Each batch material, is completed the sequencing of processing by technological process by it, is named as A successively1、A2、A3……AX…… (X is positive integer), is sequentially inputted on each rinsing branch, for any batch material A in order per batch materialsX, floating Wash in system and successively implement Q (Q is any natural number more than or equal to 2 of setting) rinse cycle, be known as Q stage countercurrents rinsing system System, rinses the number of branch and drift of the rinse unit to a batch materials on every countercurrent rinsing branch wherein in countercurrent rinsing system It is equal to wash number, material AXAny a times (a be positive integer, 1 < a≤Q) rinse cycle be:By drift used in the process Washing lotion and material rinse are mixed to form mixture, in mixed process, polluter X in material to be rinsed by dissolving, The effects such as diffusion, dilution or chemical reaction, are dispersed evenly into the liquid contained by mixture in the form of dissolved matter, by mixing The eluate containing polluter X is isolated in compound, the residue separated after eluate is material AXThe a times rinse cycle Wash rear thing.As a < Q, the rear thing of washing of a times rinse cycle enters material A as material to be rinsedXThe a+1 times it is rinsed Journey;As a=Q, material AXRear thing is washed caused by the Q times rinse cycle as countercurrent rinsing system and whole technological process most End-product, removes system;Material AXIt is thing in a times (a is positive integer, and 1≤a < Q) rinsing liquid used in rinse cycle Expect AX-1The caused eluate in the a+1 times rinse cycle;Material AXIt is in rinsing liquid used in the Q times rinse cycle The rinsing liquid liquid stream F inputted by countercurrent rinsing its exterior;Material AXThe caused eluate in the 1st rinse cycle, quilt Removal system forms eluate liquid stream H;Material AXThe Q times rinse cycle caused by wash after rear thing is moved out of system, material AX+QInto material AXThe 1st cleaning is carried out in rinse unit where former.
Above-mentioned countercurrent rinsing system can be named as the differential step dystopy change of current rinse-systems of Q, for containing in carried under one's arms solution There is the rinse cycle of the material flow A of pollutant X, if according to following state modulator to the rinse cycle of material flow A:1. wait to rinse Material flow A with equivalent divide equally different batches successively enter system;2. by being free of pollution in externally input rinsing liquid liquid stream U Thing X;3. its rinsing liquid volumetric usage is V in each secondary rinse cycle of each batch materialGK times, and each secondary rinse cycle, The eluate of same volume amount is isolated, makes to wash rear thing solution content (i.e. V identical with material flow AG=VA).According to the above State modulator is to the rinse cycle of material flow A, and in the steady production stage, its wash effect is as follows:
1. with CAWith CGRatio N value size represent Q stage countercurrent rinse-systems wash effect, i.e. NQ=CA/CG;When During Q=2 (i.e. system is 2 stage countercurrent rinse-systems), N2=(K+1)2-K;When Q=3 (i.e. system is 3 stage countercurrent rinse-systems) When, N3=(K+1) * N2-K*(K+1);As Q > 3, NQ=(K+1) * NQ-1-K*NQ-2.(in formula:CACarried under one's arms by material flow A molten Pollutant X concentration, C in liquidGPollutant X concentration in solution is carried under one's arms by countercurrent rinsing system output stream G, Q is default Rinsing times);
②MA=MG+MH(in formula:MAPollutant X mass, M in solution are carried under one's arms by material flow AGIt is defeated for countercurrent rinsing system Reactor effluent stream G carries under one's arms pollutant X mass, M in solutionHFor pollutant X matter in the eluate liquid stream H of countercurrent rinsing system output Amount);
③CG=CA/NQ, CH=CA*(NQ-1)/(K*NQ), VH=VU=K*VG=K*VA(in formula:VUTo input countercurrent rinsing The rinsing liquid liquid stream U volumes of system;VHFor the eluate liquid stream H volumes of countercurrent rinsing system output);
By the design of above-mentioned countercurrent rinsing system process parameters, the need processing generated in each countercurrent rinsing system washes out Liquid is only that each batch is rinsed material eluate caused by rinsing for the first time, and second or even the wash-off after rinsing for the Q time Liquid can be utilized repeatedly, can greatly reduce the wash-off liquid measure of generation, reduce the sewage quantity that need to be handled, and reduce waste water control Component, simultaneously because the technological design each batch be rinsed material for the first time eluate caused by rinsing by repeatedly making Just discharged with rear, therefore pollutant concentration is higher in the eluate of its discharge, if handled again by reverse osmosis unit, can obtain To the concentrated solution containing higher concentration pollutant, it is sent to pollutant extraction element again at this time and is handled, due to pollutant concentration It is higher, solution body accumulated amount to be treated can be greatly reduced and the difficulty and processing cost of processing can be reduced, preferably solved existing There is problem present in technology.
Referring to Fig. 3, regeneration cycle system has following features:
1. the system receives stream B, stream J, the reduction of its pollutant concentration is made to its processing carried out chemically or physically, and Output regeneration leacheate liquid stream D, regeneration rinse liquid liquid stream R, the pollutant stream P with solution phase separation to outside system;2. one In fixed steady production period T, liquid stream (or stream) amount, the removal rate of pollutant X of system are entered by controlling so that from The mass M of pollutant X in the pollutant stream P separated in the system in solutionDELFor MSWith MGDifference, i.e. MDEL=MS- MG(M in formulaGPollutant X mass in the solution carried under one's arms by the stream G of technological process final product, that is, rinse-system output);③ In certain steady production period T, pass through the regeneration rinse liquid liquid stream R volumes V for controlling system to exportRMeet with Lower requirement, i.e. VR=VS+VH-VA-VLOSS-VP
High concentration that the present embodiment provides, complete circulation type soil, in solid waste pollutant chemical leaching segregative line System, has following beneficial effect:
1st, the pollutant quality for needing to remove within the steady production stage, unit interval is fixed value, since this practicality is new Pollutant concentration is higher in the eluate produced in the chemical leaching piece-rate system that type provides so that need to be via regeneration cycle system The wash-off flow quantity for removing pollutant is greatly decreased, and higher pollutant concentration is usually also beneficial to improve the removal of pollutant Efficiency.
2nd, the eluate grade that the utility model countercurrent rinsing system produces is high, volume is few, and fully enters regeneration and follow Loop system, avoids the phenomenon that the discharge of low concentration poaching wastewater causes secondary pollution, and environmental benefit is good.
3rd, due to the not external waste discharge of the utility model chemical leaching piece-rate system, the corresponding eluent caused in solution Number of dropouts minimizes, and can effectively reduce operating cost.
The utility model is carried out with a specific case study on implementation below further to explain in detail explanation.
Embodiment 1
Equally by background technology exemplified by by the soil remediation of heavy metal lead pollution, using provided by the utility model highly concentrated Degree, the chemical leaching piece-rate system of complete circulation type soil pollutant carry out the improvement of lead contamination.Wherein, before the soil treatment, its Total lead content is 1000mg/kg (in terms of dry soil quality, similarly hereinafter), and soil moisture content is 21% (for moisture content of drying base, i.e. water With the mass ratio of arid soil, similarly hereinafter), the saturated aqueous rate of the soil is 52%, and saturated aqueous soil is using economically viable After dewatering means, its moisture content can drop to 30%;Management goal is:Speed by soil treatment amount 10t/h (butt) is continuous Stable operation, makes total lead content in the soil after processing be less than 150mg/kg.
Following parameter is set to rinse-system:1. use 7 differential step dystopy change of current rinse-systems (Q=7);2. chemical leaching The material flow A moisture content to be rinsed of device output is 30%, and the different batches divided equally with equivalent successively enter system;3. each Its rinsing liquid volumetric usage is V in each secondary rinse cycle of batchesGK times (K values 1.5), and each secondary rinse cycle, The eluate of same volume amount is isolated, it is identical with material flow A to make to wash solution content in rear thing, is 30%;4. by system Externally input rinsing liquid liquid stream U volumes are 4.5m3/ h, wherein without pollutant X.According to above state modulator to material flow The rinse cycle of A, in the steady production stage, its wash effect is as follows:N7=CA/CG=49.25781, (in formula:CAFor material flow A carries under one's arms pollutant X concentration, C in solutionGPollutant X concentration in solution is carried under one's arms by countercurrent rinsing system output stream G).
Following parameter is set to chemical leaching device (high concentration chemistry elution circuit) stable operation stage:1. System Solution The high concentration desired value C of middle lead0For 8000mg/L, chemical leaching uses bis- sodium solutions of EDTA- of 0.1mol/L concentration;2. soil Earth, through chemical leaching, dehydration to moisture content 30%, is exported to adverse current in the form of stream A and floated in high concentration chemistry elution circuit Wash process system;3. soil has the enough reaction time in system, and is sufficiently stirred, it is ensured that enters solution in soil Total lead eluting rate reach 90%.
Make following setting to regeneration cycle system:1. system is using anion membrane electrolysis to by high concentration chemical leaching The leaded eluate liquid stream B of system output is administered, after eluate enters anion membrane electric tank cathode room, lead and EDTA The chelate that molecule is formed is destroyed, and metallic lead, which separates out in cathode and is moved out of system, forms pollutant stream P, EDTA molecule quilt Anion membrane barrier is without entering anode chamber, being destroyed, and regenerated bis- sodium solutions of EDTA- are by cathode chamber stream after removing lead Go out, removal system is utilized as regeneration leacheate.Suitable selection electrode parameter, voltage parameter so that the removal of lead in solution Rate reaches 75%;2. system uses hyperfiltration to being handled by eluate liquid stream, the not leaded and chemical leaching after processing The clear water of agent, the system that removes form regeneration rinse liquid liquid stream R, remove system in rinse-system, concentrated solution as rinsing liquid multiplexing; 3. the regeneration leacheate of anion membrane electric tank cathode room output, the concentrated solution output system in the lump of reverse osmosis unit output, Regeneration leacheate liquid stream D is formed, is multiplexed as leacheate in high concentration chemistry elution circuit.
In the steady production stage of 1h durations, the soil butt quality of input high concentration chemistry elution circuit is 10t, input The volume that water is carried under one's arms in soil is 2.1m3(before processing moisture content 21%), after being contacted with leacheate, the lead eluting rate in soil 90%, it is eluted the lead mass M into leacheateSFor 9kg;Due to the solution lead concentration value of high concentration chemistry elution circuit setting For 8000mg/L, therefore by lead concentration C in the stream A of high concentration chemistry elution circuit output its solution for carrying under one's armsAIt is worth for 8000mg/ L, solution body accumulated amount are VA=3m3(moisture content 30%), lead mass M in solutionAIt is worth for 24kg;Using 7 differential step dystopy change of current drifts Wash system to rinse stream A, due to CA/CG=49.25781, therefore what is exported washes lead in rear material flow G its solution for carrying under one's arms Concentration CGIt is V to be worth for 162.4108mg/L, solution body accumulated amountG=3m3, lead quality is 0.48723kg in solution, rinse-system is defeated Lead concentration C in the eluate liquid stream H gone outHIt is V to be worth for 5225.059mg/L, solution body accumulated amountH=4.5m3, lead mass MHIt is worth and is 23.51277kg。
In the steady production stage of 1h durations:Input the liquid bulk of high concentration chemistry elution circuit and liquid regeneration cycle system Accumulated amount includes:VS(to carry under one's arms the volume of water, V in input soilS=2.1m3)、VH(washed for what is exported by countercurrent rinsing system Go out liquid liquid stream H volumes, VH=4.5m3);High concentration chemistry elution circuit and the volume of fluid bag of regeneration cycle system output Include:VA(for its solution body accumulated amount for carrying under one's arms of the stream A of high concentration chemistry elution circuit output, VA=3.0m3)、VR(followed by regeneration The regeneration rinse liquid liquid stream R volumes of loop system reverse osmosis unit output).To ensure that high concentration chemistry elution circuit and regeneration follow Liquid volume constant in loop system, it is necessary to so that input and output volume of fluid is identical, i.e. VR=VS+VH-VA=3.6m3, in fact Existing object above:By VH(4.5m3) regeneration cycle system reverse osmosis unit is fully entered, and moved by high concentration chemistry elution circuit Go out 2.7m3Eluate input to the reverse osmosis unit of regeneration cycle system, amount to 7.2m above3Solution through reverse osmosis unit at Reason, it is 50% to control its producing water ratio, forms volume 3.6m3Regeneration rinse liquid liquid stream VROutput forms volume to rinse-system Measure 3.6m3Concentrated solution be back to high concentration chemistry elution circuit.
In the steady production stage of 1h durations:Input in high concentration chemistry elution circuit and regeneration cycle system in solution Lead quality includes:MS(for the lead quality being eluted in input soil, MS=9kg), MH(for the eluate exported by rinse-system Lead quality in liquid stream H, MH=23.51277kg);In high concentration chemistry elution circuit and the solution of regeneration cycle system output Lead quality include:MA(for the lead quality in the stream A of high concentration chemistry elution circuit output its solution for carrying under one's arms, MA= 24kg)、MP(metallic lead separates out in electric tank cathode and is moved out of the quality of system).To ensure in high concentration chemistry elution circuit Lead maintains high concentration desired value C in solution0(8000mg/L), it is necessary to so that high concentration chemistry elution circuit and regeneration cycle system The input of lead, output quantity are identical in solution, i.e. MP=MS+MH-MA=8.51277kg, to realize object above:By high concentration Learn elution circuit and remove 1.418795m3Eluate input the removal rate for regeneration cycle system electrodialysis plant, controlling its lead Reach 75%, separated out at this time in electric tank cathode and be moved out of the metallic lead mass M of systemPFor 8.51277kg.
In the steady production stage of 1h durations:The rinsing liquid liquid stream U volumes for inputting countercurrent rinsing system are 4.5m3, its Include volume 3.6m3Regeneration rinse liquid liquid stream VR, by the Fresh rinse solution liquid stream F volumes of technological process external complement VFFor 0.9m3
In the steady production stage of 1h durations, by the stream A of high concentration chemistry elution circuit output its solution for carrying under one's arms EDTA molar concentration values CAE is 0.1mol/L, and solution body accumulated amount is VA=3m3(moisture content 30%), rinse-system to stream A into After row rinsing, wash effect value N7=49.25781, therefore what is exported washes EDTA molar concentrations in rear material flow G its solution for carrying under one's arms Value CGE is 0.00203mol/L, solution body accumulated amount is VG=3m3, EDTA moles are 6.090405mol in solution.To remain high The concentration value of elution medicament in concentration chemical leaching system, from technological process outside input mole into the system and be The EDTA- disodiums (i.e. stream C) of 6.090405mol, its reduced mass are 2.267092kg.
In the steady production stage of 1h durations, rear material flow G (i.e. technological process final product) is washed in rinse-system output Butt quality is 10t, and it is 3m to carry under one's arms amount of solution3(moisture content 30%).Since high concentration chemistry elution circuit is to lead in soil Elution efficiency is 90%, therefore the lead (quality 1kg) containing 100mg/kg in stream G its solid phase;Lead in its solution for carrying under one's arms of stream G Concentration CGIt is worth for 162.4108mg/L, therefore lead quality is 0.48723kg in the liquid phases carried under one's arms of stream G.The lead that stream G is carried under one's arms Gross mass is 1.48723kg, and the lead content converted in butt soil is 148.723mg/kg, is less than the improvement of 150mg/kg Target.
To sum up, in the steady production stage of 1h durations:The material that technological process is consumed only includes 0.9m3Fresh rinsing The EDTA- disodiums of liquid, 2.267092kg;Wash-off liquid measure handled by regeneration cycle system electrodialysis plant is only 1.418795m3, reverse osmosis unit processing solution amount is 7.2m3;Technological process processing amount of soil 10t (butt), lead removal rate reach To 85.13%, recycling metallic lead quality is 1.48723kg, and realizes wastewater zero discharge, avoids the possibility of secondary pollution.
Those skilled in the art will readily occur to this practicality after considering specification and putting into practice utility model disclosed herein New other embodiments.This application is intended to cover any variations, uses, or adaptations of the utility model, these Variations, uses, or adaptations follow the general principle of the utility model and including undocumented skills of the utility model Common knowledge or conventional techniques in art field.Description and embodiments be considered only as it is exemplary, the utility model True scope and spirit are pointed out by claim.
It should be appreciated that the accurate knot that the utility model is not limited to be described above and is shown in the drawings Structure, and various modifications and changes may be made without departing from the scope thereof.The scope of the utility model only will by appended right Ask to limit.

Claims (7)

1. a kind of high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, it is characterised in that the system bag Include:Conveying device (2), equipment for separating liquid from solid (3), countercurrent rinsing device (4), reverse osmosis unit (5), pollutant extraction element (6) and for holding the chemical leaching device (1) of leacheate;
It is separately provided for detecting the concentration detector of pollutant concentration in the leacheate in the chemical leaching device (1) (11) and for detecting the volume detector (12) of the leacheate volume, the solid output terminal of the chemical leaching device (1) It is connected with the input terminal of the conveying device (2);
The output terminal of the conveying device (2) is connected with the input terminal of the equipment for separating liquid from solid (3);
The solid output terminal of the equipment for separating liquid from solid (3) is inputted by the solid of pipeline (7) and the countercurrent rinsing device (4) End connection, and valve (71) is provided with the pipeline (7), fluid output port and describedization of the equipment for separating liquid from solid (3) Learn the fluid input port connection of elution device (1);
The infiltration with fresh water source and the reverse osmosis unit (5) respectively of the fluid input port of the countercurrent rinsing device (4) Liquid output terminal connects, the fluid output port of the countercurrent rinsing device (4) and the fluid input port of the chemical leaching device (1) Connection;
The input terminal of the reverse osmosis unit (5) is connected with the fluid output port of the chemical leaching device (1), described reverse osmosis The concentrated solution output terminal of device (5) is connected with the fluid input port of the chemical leaching device (1);
The input terminal of the pollutant extraction element (6) is connected with the fluid output port of the chemical leaching device (1), the dirt The fluid output port of dye thing extraction element (6) is connected with the fluid input port of the chemical leaching device (1);
Wherein, the output terminal of the concentration detector (11) is connected with the control terminal of the pollutant extraction element (6), the body The output terminal of product detector (12) is connected with the control terminal of the reverse osmosis unit (5).
2. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 1 In the countercurrent rinsing device (4) is made of multiple countercurrent rinsing branches (41) being arranged in parallel successively, and each countercurrent rinsing Rinsing device (411) and the temporary storage tank of eluate (412) are respectively arranged with branch (41);
Wherein, the solid input terminal of the rinsing device (411) is exported by the solid of pipeline (7) and equipment for separating liquid from solid (3) End connection, and is provided with valve (71) on the pipeline (7), the fluid input port of the rinsing device (411) respectively with it is fresh The penetrating fluid output terminal of water source and the reverse osmosis unit (5) connects, the fluid output port of the rinsing device (411) and institute State the input terminal connection of the temporary storage tank of eluate (412);
The output terminal of the temporary storage tank of eluate (412) respectively with the fluid input port of the chemical leaching device (1) and under The fluid input port connection of rinsing device (411) in one countercurrent rinsing branch (41).
3. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 2 In the rinsing device (411) is filter-pressing device.
4. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 2 In, the rinsing device (411) include housing (4111), rotating cabin (4112), the first motor (4113), rabble (4114) with And second motor (4115);
Through hole is arranged at intervals with the rotating cabin (4112), rotating cabin (4112) rotation is installed on the housing (4111) It is internal;
The output terminal of first motor (4113) is drivingly connected with the upper end of the rabble (4114), the rabble (4114) lower end is inserted in the inside of the rotating cabin (4112);
The drive end of second motor (4115) is drivingly connected with the rotating cabin (4112).
5. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 2 In the output terminal also input terminal with the reverse osmosis unit (5) and the pollutant respectively of, the temporary storage tank of eluate (412) The input terminal connection of extraction element (6).
6. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 1 It is connected in input terminal of the concentrated solution output terminal also with the pollutant extraction element (6) of, the reverse osmosis unit (5).
7. high concentration, the chemical leaching piece-rate system of complete circulation type pollutant in soil, its feature exist according to claim 1 In the pollutant extraction element 6 is electrodialysis plant or extraction equipment.
CN201721046294.7U 2017-08-21 2017-08-21 The chemical leaching piece-rate system of pollutant in high concentration, complete circulation type soil, solid waste Withdrawn - After Issue CN207271800U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107309263A (en) * 2017-08-21 2017-11-03 张晨 The chemical leaching separation method and its piece-rate system of pollutant in high concentration, complete circulation type soil, solid waste
CN108627382A (en) * 2018-05-25 2018-10-09 西南大学 A kind of sample pre-treatments and detection integrated apparatus measuring all kinds of indexs of soil based on microfluidic chip technology

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107309263A (en) * 2017-08-21 2017-11-03 张晨 The chemical leaching separation method and its piece-rate system of pollutant in high concentration, complete circulation type soil, solid waste
WO2019037562A1 (en) * 2017-08-21 2019-02-28 张晨 Chemical leaching and separating method for contaminants in soil or solid waste and separation system thereof
CN108627382A (en) * 2018-05-25 2018-10-09 西南大学 A kind of sample pre-treatments and detection integrated apparatus measuring all kinds of indexs of soil based on microfluidic chip technology
CN108627382B (en) * 2018-05-25 2020-06-23 西南大学 Sample pretreatment and detection integrated device for determining various indexes of soil based on microfluidic chip technology

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