CN109593956A - A kind of enriching apparatus and method of uranium solution - Google Patents
A kind of enriching apparatus and method of uranium solution Download PDFInfo
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- CN109593956A CN109593956A CN201811502609.3A CN201811502609A CN109593956A CN 109593956 A CN109593956 A CN 109593956A CN 201811502609 A CN201811502609 A CN 201811502609A CN 109593956 A CN109593956 A CN 109593956A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/42—Treatment or purification of solutions, e.g. obtained by leaching by ion-exchange extraction
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B60/00—Obtaining metals of atomic number 87 or higher, i.e. radioactive metals
- C22B60/02—Obtaining thorium, uranium, or other actinides
- C22B60/0204—Obtaining thorium, uranium, or other actinides obtaining uranium
- C22B60/0217—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes
- C22B60/0252—Obtaining thorium, uranium, or other actinides obtaining uranium by wet processes treatment or purification of solutions or of liquors or of slurries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to Uranium Mining smelting fields, and in particular to a kind for the treatment of process of the enriched uranium from uranium-bearing leachate.The following steps are included: (1) establishes low concentration uranium solution membrane capacitance enrichment system, including collector unit, pretreatment unit, membrane capacitance uranium enrichment unit, cleaning unit.(2) system each unit is passed sequentially through, is carried out in membrane capacitance enrichment unit by positive charging work process, breaking cyclic process and reverse charge regenerative process circulation, realizes the enrichment of uranium in reverse charge regenerative process.The clear liquid that simultaneity factor generates can be used as plant area and recycle with realizations such as medicinal water.This technique can be by 1~30 times of leaching liquid enrichment of 5~100mg/L of uranium concentration.This unit rear end is combined with ion-exchange process, is conducive to improve ion exchange feed liquor uranium concentration, is improved resin adsorption capacity indirectly.
Description
Technical field
The present invention relates to Uranium Mining smelting fields, more particularly, to a kind of processing work of enriched uranium from uranium-bearing leachate
Skill.
Background technique
Field is soaked at present, and the enrichment method of uranium is mainly ion-exchange and solvent extraction.Neutral in-situ leaching process one
As use ion-exchange.Ion-exchange is that ground leaching uranium-bearing leachate is passed through ion exchange tower using macromolecule rouge as carrier
Make uranium-bearing ion exchange into hard resin, again after acids elutes to obtain enrichment by the chemical replacement process of adsorption process
Uranium-bearing mother liquor.With the passage of uranium mining time, uranium concentration is constantly reduced in ground leaching leachate, causes ion exchange resin
Adsorption capacity reduce, leachate processing cost increase the problems such as.
Membrane capacitance uranium enrichment unit is electric conductivity, the adsorptivity using active carbon class electrode, makes the ion in solution in electricity
Under the action of, anion is migrated to anode, and cation is to cathodic migration, and uranium-bearing anion is adsorbed by anode at this time.It runs up to
To a certain degree, by being reversely powered, under the action of new electric field, the ion of electrode surface is adsorbed on to opposite side electrode movement.Together
When, since anion can not penetrate the cation-exchange membrane of opposite side, cation can not also penetrate the anion-exchange membrane of opposite side, because
The ion that this uranium-bearing anion is desorbed with other is intercepted between amberplex together, generates concentration effect.Currently, the skill
Art is chiefly used in circulating cooling water desalination, has no the case that uranium enrichment is carried out using the technology both at home and abroad.
Summary of the invention
It is an object of the invention to: a kind of new uranium enrichment method is found, as the preposition processing technique of ion exchange, solution
The problem of adsorption capacity caused by certainly uranium concentration is too low reduces realizes the preliminary richness for neutrally soaking low concentration uranium in mine-for-leach liquid
Collection.
Technical scheme is as follows: a kind of enriching apparatus of uranium solution, it is characterised in that: including collector unit, in advance
Processing unit, membrane capacitance uranium enrichment unit, cleaning unit；
Collector unit includes elevator pump and collecting tank, and elevator pump is connected to collecting tank；Elevator pump is for directly taking out hole from well site
Promote leachate.Collecting tank is for the collection for leachate；
Pretreatment unit includes raw liquor pump, quartz filter, bag filter；Wherein collecting tank is connected to raw liquor pump, former
Liquid pump is connected to quartz filter, and quartz filter connects bag filter, and bag filter connects liquid collecting by return valve
Pond；Raw liquor pump uses submersible sewage pump, and promoting leachate in collecting tank, to quartz filter, it is with pressure directly that quartz filter produces water
Solution suspension object SS is reduced for retaining the large granular impurity in leachate into bag filter；
Membrane capacitance uranium enrichment unit includes membrane capacitance module, conductivity meter；Wherein bag filter is connected by inlet valve
Membrane capacitance module, membrane capacitance module connects conductivity meter, and conductivity meter produces water valve by lean solution and connects collecting tank, conductivity meter
It is also connected with dope and produces water valve, conductivity meter is also connected with clear liquid and produces water valve, and produces water valve by clear liquid and connect clear liquid discharging valve, passes through
Clear liquid produces water valve and connects wash water valve, and wash water valve connects cleaning agent storage tank；
Cleaning unit includes cleaning agent storage tank and cleaning pump；Cleaning agent storage tank connects cleaning pump, and cleaning pump reconnects film electricity
Molar block；
Membrane capacitance module includes active carbon, activated carbon fibre, graphite, graphene and anion and cation exchange membrane.
A kind of enrichment method of uranium solution, comprising the following steps:
Step 1: ground leaching takes out hole leachate and is promoted to the progress homogeneous average of collecting tank 2 by elevator pump level-one；
Step 2: solution is by pretreatment unit raw liquor pump two-stage hoisting to quartz filter, quartz sand mistake in collecting tank
Filter production water enters bag filter reduction solution suspension object SS sand filter filtering accuracy and reaches 10~20 μm；Bag filter
Filtering accuracy reaches 5~10 μm；
Step 3: bag filter produces water and enters membrane capacitance uranium enrichment unit by inlet valve；The unit initial setting up open circuit
Time t, positive charging conductivity X, water conductivity Y, lean solution conductivity Z, 4 numerical value are produced；Wherein just charging conductivity X be set as to
1.1~1.5 times of processing solution conductivity, producing water conductivity Y setting in 300~1200 μ s/cm, lean solution conductivity Z is wait locate
1.8~2.5 times for managing electrical conductivity of solution；
Step 3.1: the positive charging process of membrane capacitance module: 0.8~2.0V of membrane capacitance module charging voltage；Bag filter produces
Water enters membrane capacitance module by inlet valve, and when producing water conductivity Y through conductivity meter detection conductivity >, lean solution produces water valve and opens
It opens, dope produces water valve, clear liquid produces water valve and closes, and solution produces water valve through lean solution and returns to collecting tank；Conductivity is detected through conductivity meter
When≤production water conductivity Y, clear liquid produces water valve, clear liquid discharging valve is opened, and lean solution produces water valve and dope produces water valve closing, and wash water valve closes
It closes, solution is recycled through valve, clear liquid discharging valve outlet；When > produces water conductivity Y to conductivity meter detection conductivity again, system
Into next step membrane capacitance open circuit process；
Step 3.2: the breaking process of membrane capacitance module 6: breaking after membrane capacitance module short circuit 15s；Inlet valve is closed, return valve
It opens, to prevent the frequent start-stop of raw liquor pump, bag filter 5 produces water and is back to collecting tank by return valve；The breaking duration
It is set as 60s~180s for setting value t, t, enters next step membrane capacitance regenerative process later；
Step 3.3: 6 regenerative process of membrane capacitance module: membrane capacitance module reverse charging, 0.8~2.0V of charging voltage；Pocket type
Filter produces water and enters membrane capacitance module by valve, and inlet valve, dope produce water valve and open, remaining valve is closed；The uranium being enriched with
Solution is discharged from dope valve；When detecting conductivity≤lean solution conductivity Z through conductivity meter, lean solution produces water valve and opens, and dope produces water
Valve, clear liquid produce water valve and close, and solution produces water valve through lean solution and returns to collecting tank, until when conductivity≤positive charging conductivity X, system
Return to the positive charging process of membrane capacitance module；
Step 4:, will by manually controlling clear liquid discharging valve and wash water valve during the positive charging process clear liquid of step 3.1 produces water
Cleaning agent storage tank is filled spare；
Step 5: system, which is run, starts cleaning process when being more than 0.6Mpa to membrane capacitance module internal pressure；Raw liquor pump is shut down, into
Water valve is closed, lean solution produces water valve and opens, and dope produces water valve and closes, and clear liquid produces water valve and closes；
Membrane capacitance module off state, cleaning agent pump squeezes into the solution of cleaning agent storage tank in membrane capacitance module, wherein storing up
The solution deposited produces water valve by lean solution and is back to collecting tank；In membrane capacitance module after solution replacement, cleaning agent pump and lean solution
Water valve is produced to close.
Cleaning process terminates, and returns to step 2.
In the step 1, collecting tank water quality pH6~10, uranium concentration is 5mg/L~100mg/L, 0~10000 μ of conductivity
s/cm。
In the step 3, setting breaking time t is 120s, positive charging conductivity X is 4400 μ s/cm, produces water conductivity Y
It is 8000 μ s/cm for 1200 μ s/cm, lean solution conductivity Z.
In the step 3.1, membrane capacitance module charging voltage 1.1V；Bag filter produces water and enters membrane capacitance mould by valve
Block, when detecting 1200 μ s/cm of conductivity > through conductivity meter, lean solution produces water valve and opens, and dope produces water valve, clear liquid produces water valve and closes
It closes, solution produces water valve through lean solution and returns to collecting tank；When detecting conductivity≤1200 μ s/cm through conductivity meter, clear liquid produces water valve, clear
Liquid discharging valve is opened, and lean solution produces water valve and dope produces water valve and closes, and wash water valve is closed, and solution clear liquid produces water valve, clear liquid discharging valve
Outlet recycles；When conductivity meter detects conductivity 1200 μ s/cm of > again, system enters next step membrane capacitance open circuit
Journey.
In the step 3.2, the breaking duration is setting value t, and t takes 60.
In the step 3.3, when detecting conductivity≤8000 μ s/cm through conductivity meter, lean solution produces water valve and opens, and dope produces
Water valve, clear liquid produce water valve and close, and solution returns to system front end collecting-tank through valve, until system is returned when conductivity≤4400 μ s/cm
To the positive charging process of membrane capacitance module 6.
In the step 5, membrane capacitance system-down impregnates 1~2h.
Remarkable result of the invention is:
(a) present invention can be by 1~30 times of leaching liquid enrichment of 5~100mg/L of uranium concentration.
(b) present invention can be combined with ion-exchange process, improved ion exchange feed liquor uranium concentration, improved resin indirectly
Adsorption capacity.
(c) clear liquid recycling may be implemented in the present invention while uranium enrichment, and clear liquid, which can be used as, recycles benefit with medicinal water etc.
With.
(d) present invention firstly provides the method for carrying out low concentration uranium solution enrichment using membrane capacitance uranium beneficiation technologies and its
Process flow.
(e) present invention firstly provides according to the method for producing water conductivity progress system automatic control.
Detailed description of the invention
Fig. 1 is enrichment method schematic diagram of the present invention；
In figure: 1. elevator pump, 2. collecting tank, 3. raw liquor pump, 4. quartz filter, 5. bag filter, 6. membrane capacitance
7. conductivity meter of module, 8. cleaning agent storage tank, 9. cleaning agent pumps 10. dope, 11. clear liquid, 12. lean solution, 13. inlet valve 14.
Lean solution produces 15. dope of water valve and produces 16. clear liquid of water valve production 17. clear liquid discharging valve of water valve, 18. wash water valve, 19. return valve
Specific embodiment
Embodiment 1
A kind of enriching apparatus of uranium solution, including collector unit, pretreatment unit, membrane capacitance uranium enrichment unit, cleaning list
Member.
Collector unit includes elevator pump 1 and collecting tank 2, and elevator pump 1 is connected to collecting tank 2；Elevator pump 1 is used for directly from well site
It takes out hole and promotes leachate.Collecting tank 2 realizes the purpose of homogeneous average for the collection for leachate, is subsequent technique
Service.
Pretreatment unit includes raw liquor pump 3, quartz filter 4, bag filter 5.Wherein collecting tank 2 is connected to raw liquor pump
3, raw liquor pump 3 is connected to quartz filter 4, and quartz filter 4 connects bag filter 5, and bag filter 5 passes through return valve
19 connection collecting tanks 2；Raw liquor pump 3 uses submersible sewage pump, promotes in collecting tank 2 leachate to quartz filter 4, quartz sand filtration
Device 4 produces that water is with pressure is directly entered bag filter 5, for retaining the large granular impurity in leachate, reduces solution suspension object SS
(Suspended Solids)。
Membrane capacitance uranium enrichment unit includes membrane capacitance module 6, conductivity meter 7.Wherein bag filter 5 passes through inlet valve 13
Junctional membrane capacitance module 6, membrane capacitance module 6 connects conductivity meter 7, and conductivity meter 7 produces water valve 14 by lean solution and connects liquid collecting
Pond 2, conductivity meter 7 are also connected with dope and produce water valve 15, and conductivity meter 7 is also connected with clear liquid and produces water valve 16, and produces water valve by clear liquid
16 connection clear liquid discharging valves 17 produce water valve 16 by clear liquid and connect wash water valve 18, and wash water valve 18 connects cleaning agent storage tank 8；Film electricity
Molar block 6 includes active carbon, activated carbon fibre, graphite, graphene and anion and cation exchange membrane.The unit is by automatically controlling system
System successively carries out positive charging work process, breaking cyclic process and reverse charge regenerative process, three processes and moves in circles.
Cleaning unit includes cleaning agent storage tank 8 and cleaning pump 9.Cleaning agent storage tank 8 connects cleaning pump 9, and cleaning pump 9 reconnects
Membrane capacitance module 6；When pressure is greater than 0.6Mpa in membrane capacitance module 6, carries out membrane capacitance module 6 and clean, it is molten in replacement module
Liquid.
A kind of enrichment method of uranium solution, comprising the following steps:
Step 1: ground leaching takes out hole leachate and is promoted to the progress homogeneous average of collecting tank 2 by 1 level-one of elevator pump.2 water of collecting tank
Matter pH6~10, uranium concentration are 5mg/L~100mg/L, 0~10000 μ s/cm of conductivity；
Step 2: solution is by 3 two-stage hoisting of pretreatment unit raw liquor pump to quartz filter 4, quartz in collecting tank 2
Sand filter 4 produces water bag filter 5 reduction by 4 filtering accuracy of solution suspension object SS sand filter with pressure that enters and reaches 10~20 μ
m；Bag filter filtering accuracy reaches 5~10 μm；
Step 3: bag filter 5 produces water and enters membrane capacitance uranium enrichment unit by inlet valve 13；The unit initial setting up
Breaking time (t), produces 4 water conductivity (Y), lean solution conductivity (Z) numerical value at the conductivity that just charging (X), passes through conductivity meter 7
The actual numerical value of measurement realizes that system automatically controls compared with setting numerical value, makes membrane capacitance module 6 times and enters membrane capacitance open circuit
Process, positive charging work process and reverse charge regenerative process；
Step 3.1: the positive charging process of membrane capacitance module 6: 6 0.8~2.0V of charging voltage of membrane capacitance module；Bag filter
5, which produce water, enters membrane capacitance module 6 by inlet valve 13, when detecting conductivity > production water conductivity (Y) through conductivity meter 7, lean solution
It produces water valve 14 to open, dope produces water valve 15, clear liquid produces water valve 16 and closes, and solution produces water valve 14 through lean solution and returns to collecting tank 2；Through electricity
When electrical conductivity instrument 7 detects conductivity≤production water conductivity (Y), clear liquid produces water valve 16, clear liquid discharging valve 17 is opened, and lean solution produces water valve 14
It produces water valve 15 with dope to close, wash water valve 18 is closed, and solution is recycled through valve 16,17 outlet of valve；When conductivity meter 7 detects conductance
Rate again > produce water conductivity (Y) when, system enters next step membrane capacitance open circuit process；
Step 3.2: the breaking process of membrane capacitance module 6: breaking after membrane capacitance module short circuit 15s；Inlet valve 13 is closed, reflux
Valve 19 is opened, and to prevent the frequent start-stop of raw liquor pump 3, bag filter 5 produces water and is back to collecting tank 2 by return valve 19；Open circuit
Duration is setting value t, is traditionally arranged to be 60s~180s, enters next step membrane capacitance regenerative process later；
Step 3.3: 6 regenerative process of membrane capacitance module: 6 reverse charging of membrane capacitance module, 0.8~2.0V of charging voltage；Bag
Formula filter 5 produces water and enters membrane capacitance module 6 by valve 13, and inlet valve 13, dope produce water valve 16 and open, remaining valve is closed；
The uranium solution being enriched with is discharged from dope valve 16；When detecting conductivity≤lean solution conductivity (Z) through conductivity meter 7, lean solution produces water
Valve 14 is opened, and dope produces water valve 15, clear liquid produces water valve 16 and closes, and solution produces water valve 14 through lean solution and returns to collecting tank 2, until conductance
When rate≤just charging conductivity (X), system returns to the positive charging process of membrane capacitance module 6；
Step 4: during the positive charging process clear liquid of step 3.1 produces water, by manually controlling clear liquid discharging valve 17 and wash water valve
18, cleaning agent storage tank 8 is filled spare；
Step 6: system, which is run, starts cleaning process when being more than 0.6Mpa to 6 internal pressure of membrane capacitance module；Raw liquor pump 3 is shut down,
Inlet valve 13 is closed, lean solution produces water valve 14 and opens, and dope produces water valve 15 and closes, and clear liquid produces water valve 16 and closes；Membrane capacitance module 6 is disconnected
Line state, cleaning agent pump 9 squeezes into the solution of cleaning agent storage tank 8 in membrane capacitance module 6, wherein the solution stored is produced by lean solution
Water valve 14 is back to collecting tank 2；In membrane capacitance module 6 after solution replacement, cleaning agent pump 9 and lean solution produce water valve 14 and close,
Membrane capacitance system-down impregnates 1~2h.
Step 7: cleaning process terminates, and returns to step 2.
Embodiment 2
Step 1: establishing low concentration uranium solution membrane capacitance enrichment system.System mainly includes leachate collector unit, pre- place
Manage unit, membrane capacitance uranium enrichment unit, cleaning unit.
Collector unit is made of well site deep well pump and collecting tank.Deep well pump promotes leachate for directly taking out hole from well site.
Collecting tank realizes the purpose of homogeneous average for the collection for leachate, is subsequent technique service.
Pretreatment unit is made of raw liquor pump, quartz filter, bag filter.Raw liquor pump uses submersible sewage pump, is promoted
Leachate is to quartz filter in collecting-tank, and quartz filter produces that water is with pressure to be directly entered bag filter, for retaining
Large granular impurity in leachate reduces solution suspension object SS (Suspended Solids).
Membrane capacitance uranium enrichment unit is mainly made of membrane capacitance module, conductivity meter.Membrane capacitance module is by active carbon, activity
Carbon fibe, graphite, graphene and anion and cation exchange membrane composition.The unit successively carries out breaking circulation by automatic control system
Process, positive charging work process and reverse charge regenerative process, three processes move in circles.
Cleaning unit is mainly made of cleaning agent storage tank and cleaning pump.When pressure is greater than 0.6Mpa in membrane capacitance module,
Carry out the cleaning of membrane capacitance module, solution in replacement module.
Step 2: ground leaching takes out hole leachate and is promoted to collecting tank progress homogeneous average by elevator pump level-one.Collecting-tank water quality exists
PH7.48, uranium concentration 28mg/L, 3860 μ s/cm of conductivity.
Step 3: solution is by pretreatment unit raw liquor pump two-stage hoisting to quartz filter in collecting tank.Filter produces
The water bag filter with pressure that enters reduces solution suspension object SS.Quartz filter filtering accuracy reaches 10~20 μm.Pocket type mistake
Filter filtering accuracy reaches 5~10 μm.
Step 4: bag filter produces water and enters membrane capacitance uranium enrichment unit by inlet valve 13.The unit initial setting up is disconnected
Road time 120s, positive charging 4400 μ s/cm of conductivity, 1200 μ s/cm of water conductivity, 8000 μ s/cm of lean solution conductivity are produced.
1) the positive charging process of membrane capacitance: membrane capacitance charging voltage 1.1V.Bag filter produces water and enters film electricity by valve 13
Molar block 6, when detecting 1200 μ s/cm of conductivity > through conductivity meter 7, lean solution produces water valve 14 and opens, and dope produces water valve 15, clear liquid
It produces water valve 16 to close, solution returns to system front end collecting-tank through valve 14；When detecting conductivity≤1200 μ s/cm through conductivity meter 7,
Clear liquid produces water valve 16, valve 17 is opened, and lean solution, which produces water valve 14 and dope and produces water valve 15, closes, and wash water valve 18 is closed, solution through valve 16,
17 outlet of valve recycles；When conductivity meter 7 detects conductivity 1200 μ s/cm of > again, it is disconnected that system enters next step membrane capacitance
Pass by journey.
2) membrane capacitance open circuit process: breaking after membrane capacitance module short circuit 15s.Valve 13 is closed, and valve 19 is opened, bag filter
It produces water and is back to collecting-tank by valve 19.Enter next step membrane capacitance regenerative process after breaking 60s.
3) membrane capacitance regenerative process: membrane capacitance reverse charging, 0.8~2.0V of charging voltage.Bag filter, which produces water, to be passed through
Valve 13 enters membrane capacitance module 6, and inlet valve 13, dope produce water valve 16 and open, remaining valve is closed.The uranium solution being enriched with is from dense
Liquid valve 16 is discharged.When detecting conductivity≤8000 μ s/cm through conductivity meter 7, lean solution produces water valve 14 and opens, dope production water valve 15,
Clear liquid produces water valve 16 and closes, and solution returns to system front end collecting-tank through valve 14, until system is returned when conductivity≤4400 μ s/cm
To the positive charging process of membrane capacitance.
Step 5: during the positive charging process clear liquid of step 4 produces water, by manually controlling clear liquid discharging valve 17 and wash water valve 18,
Cleaning agent storage tank 8 is filled spare.
Step 6: system, which is run, starts cleaning process when being more than 0.6Mpa to membrane capacitance internal pressure.Raw water pump is shut down, inlet valve
13 close, lean solution produces water valve 14 and opens, and dope produces water valve 15 and closes, and clear liquid produces water valve 16 and closes.Membrane capacitance off state, cleaning
Pump 9 squeezes into the solution of cleaning agent storage tank 8 in membrane capacitance module, wherein the solution stored is back to collecting-tank by valve 14.Film
In capacitance module after solution replacement, cleaning pump 9 and lean solution produce water valve 14 and close, and membrane capacitance system-down impregnates 1~2h.
Step 7: cleaning process terminates, and returns to step 2.
Dope uranium concentration 437mg/L after being enriched with by the realization of this technique, 15.6 times of enrichment times；Clear liquid produces water conductivity
298 μ s/cm, uranium concentration < 1mg/L.
A kind of enrichment method of uranium solution, it is characterised in that: the following steps are included:
Step 1: ground leaching takes out hole leachate and is promoted to the progress homogeneous average of collecting tank 2 by 1 level-one of elevator pump；
Step 2: (solution is by 3 two-stage hoisting of pretreatment unit raw liquor pump to quartz filter 4, quartz sand in 2 for liquid collecting
The production water of filter 4 enters reduction solution suspension object SS sand filter (4) filtering accuracy of bag filter 5 and reaches 10~20 μm；Bag
Formula filter filtering accuracy reaches 5~10 μm；
Step 3: bag filter 5 produces water and enters membrane capacitance uranium enrichment unit by inlet valve 13；The unit initial setting up
Breaking time t, positive charging conductivity X, water conductivity Y, lean solution conductivity Z, 4 numerical value are produced；Wherein just charging conductivity X setting
It is 1.1~1.5 times of electrical conductivity of solution to be processed, producing water conductivity Y setting in 300~1200 μ s/cm, lean solution conductivity Z is
1.8~2.5 times of electrical conductivity of solution to be processed；
Step 3.1: the positive charging process of membrane capacitance module 6: 6 0.8~2.0V of charging voltage of membrane capacitance module；Bag filter
5, which produce water, enters membrane capacitance module 6 by inlet valve 13, and when detecting conductivity > production water conductivity Y through conductivity meter 7, lean solution is produced
Water valve 14 is opened, and dope produces water valve 15, clear liquid produces water valve 16 and closes, and solution produces water valve 14 through lean solution and returns to collecting tank 2；Through conductance
When rate instrument 7 detects conductivity≤production water conductivity Y, clear liquid produces water valve 16, clear liquid discharging valve 17 is opened, and lean solution produces water valve 14 and dense
Liquid produces water valve 15 and closes, and wash water valve 18 is closed, and solution is recycled through valve 16,17 outlet of clear liquid discharging valve；When conductivity meter 7 detects
Conductivity again > produce water conductivity Y when, system enters next step membrane capacitance open circuit process；
Step 3.2: the breaking process of membrane capacitance module 6: breaking after membrane capacitance module short circuit 15s；Inlet valve 13 is closed, reflux
Valve 19 is opened, and to prevent the frequent start-stop of raw liquor pump 3, bag filter 5 produces water and is back to collecting tank 2 by return valve 19；Open circuit
Duration is setting value t, and t is set as 60s~180s, enters next step membrane capacitance regenerative process later；
Step 3.3: 6 regenerative process of membrane capacitance module: 6 reverse charging of membrane capacitance module, 0.8~2.0V of charging voltage；Bag
Formula filter 5 produces water and enters membrane capacitance module 6 by valve 13, and inlet valve 13, dope produce water valve 16 and open, remaining valve is closed；
The uranium solution being enriched with is discharged from dope valve 16；When detecting conductivity≤lean solution conductivity Z through conductivity meter 7, lean solution produces water valve
14 open, and dope produces water valve 15, clear liquid produces water valve 16 and closes, and solution produces water valve 14 through lean solution and returns to collecting tank 2, until conductivity
When≤positive charging conductivity X, system returns to the positive charging process of membrane capacitance module 6；
Step 4: during the positive charging process clear liquid of step 3.1 produces water, by manually controlling clear liquid discharging valve 17 and wash water valve
18, cleaning agent storage tank 8 is filled spare；
Step 5: system, which is run, starts cleaning process when being more than 0.6Mpa to 6 internal pressure of membrane capacitance module；Raw liquor pump 3 is shut down,
Inlet valve 13 is closed, lean solution produces water valve 14 and opens, and dope produces water valve 15 and closes,
Clear liquid produces water valve 16 and closes；6 off state of membrane capacitance module, the solution that cleaning agent pumps 9 cleaning agent storage tanks 8 squeeze into film
In capacitance module 6, wherein the solution stored, which produces water valve 14 by lean solution, is back to collecting tank 2；Solution replacement in membrane capacitance module 6
After, cleaning agent pump 9 and lean solution produce water valve 14 and close.
Claims (10)
1. a kind of enriching apparatus of uranium solution, it is characterised in that: single including collector unit, pretreatment unit, the enrichment of membrane capacitance uranium
Member, cleaning unit；
Collector unit includes elevator pump (1) and collecting tank (2), and elevator pump (1) is connected to collecting tank (2)；Elevator pump (1) is for direct
Hole, which is taken out, from well site promotes leachate；Collecting tank (2) is for the collection for leachate；
Pretreatment unit includes raw liquor pump (3), quartz filter (4), bag filter (5)；Wherein collecting tank (2) connection is former
Liquid pump (3), raw liquor pump (3) are connected to quartz filter (4), and quartz filter (4) connects bag filter (5), pocket type mistake
Filter (5) passes through return valve (19) connection collecting tank (2)；Raw liquor pump (3) uses submersible sewage pump, promotes leachate in collecting tank (2)
To quartz filter (4), quartz filter (4) produces that water is with pressure is directly entered bag filter (5), for retaining leachate
In large granular impurity, reduce solution suspension object SS；
Membrane capacitance uranium enrichment unit includes membrane capacitance module (6), conductivity meter (7)；Wherein bag filter (5) passes through inlet valve
(13) junctional membrane capacitance module (6), membrane capacitance module (6) connects conductivity meter (7), and conductivity meter (7) produces water by lean solution
Valve (14) connects collecting tank (2), and conductivity meter (7) is also connected with dope and produces water valve (15), and conductivity meter (7) is also connected with clear liquid and produces water
Valve (16), and water valve (16) connection clear liquid discharging valve (17) is produced by clear liquid, water valve (16) are produced by clear liquid and connect wash water valve
(18), wash water valve (18) connection cleaning agent storage tank (8)；
Cleaning unit includes cleaning agent storage tank (8) and cleaning pump (9)；Cleaning agent storage tank (8) connects cleaning pump (9), cleaning pump (9)
It reconnects membrane capacitance module (6).
2. a kind of enriching apparatus of uranium solution according to claim 1, it is characterised in that: membrane capacitance module (6) includes living
Property charcoal, activated carbon fibre, graphite, graphene and anion and cation exchange membrane.
3. a kind of enrichment method for the enriching apparatus for applying uranium solution as claimed in claim 2, it is characterised in that: including following
Step:
Step 1: ground leaching takes out hole leachate and is promoted to the progress homogeneous average of collecting tank 2 by elevator pump (1) level-one；
Step 2: collecting tank (2) interior solution is by pretreatment unit raw liquor pump (3) two-stage hoisting to quartz filter (4), stone
Sand filter (4) production water enters reduction solution suspension object SS sand filter (4) filtering accuracy of bag filter 5 and reaches 10~20
μm；Bag filter filtering accuracy reaches 5~10 μm；
Step 3: bag filter (5) produces water and enters membrane capacitance uranium enrichment unit by inlet valve (13)；The unit initial setting up
Breaking time t, positive charging conductivity X, water conductivity Y, lean solution conductivity Z, 4 numerical value are produced；Wherein just charging conductivity X setting
It is 1.1~1.5 times of electrical conductivity of solution to be processed, producing water conductivity Y setting in 300~1200 μ s/cm, lean solution conductivity Z is
1.8~2.5 times of electrical conductivity of solution to be processed；
Step 3.1: membrane capacitance module (6) positive charging process: membrane capacitance module (6) 0.8~2.0V of charging voltage；Bag filter
(5) it produces water and enters membrane capacitance module (6) by inlet valve (13), when detecting conductivity > production water conductivity Y through conductivity meter 7,
Lean solution produces water valve (14) and opens, and dope produces water valve (15), clear liquid produces water valve (16) and closes, and solution produces water valve (14) through lean solution and returns to
Collecting tank (2)；When detecting conductivity≤production water conductivity Y through conductivity meter 7, clear liquid produces water valve (16), clear liquid discharging valve (17)
It opens, lean solution produces water valve (14) and dope produces water valve (15) and closes, and wash water valve (18) is closed, and solution is through valve (16), clear liquid outlet
Valve (17) outlet recycles；When > produces water conductivity Y to conductivity meter (7) detection conductivity again, system enters next step film
Capacitor open circuit process；
Step 3.2: the breaking process of membrane capacitance module 6: breaking after membrane capacitance module short circuit 15s；Inlet valve 13 is closed, return valve
(19) it opens, to prevent the frequent start-stop of raw liquor pump 3, bag filter (5) produces water and is back to collecting tank (2) by return valve 19；
The breaking duration is setting value t, and t is set as 60s~180s, enters next step membrane capacitance regenerative process later；
Step 3.3: membrane capacitance module (6) regenerative process: membrane capacitance module (6) reverse charging, 0.8~2.0V of charging voltage；Bag
Formula filter (5) produces water and enters membrane capacitance module (6) by valve (13), and inlet valve (13), dope produce water valve (16) and open, remaining
Valve is closed；The uranium solution being enriched with is discharged from dope valve (16)；Conductivity≤lean solution conductivity Z is detected through conductivity meter (7)
When, lean solution produces water valve (14) and opens, and dope produces water valve (15), clear liquid produces water valve (16) and closes, and solution produces water valve (14) through lean solution
Collecting tank (2) are returned to, until system returns to membrane capacitance module (6) positive charging process when conductivity≤positive charging conductivity X；
Step 4: during the positive charging process clear liquid of step 3.1 produces water, by manually controlling clear liquid discharging valve 17 and wash water valve (18),
Cleaning agent storage tank (8) is filled spare；
Step 5: system, which is run, starts cleaning process when being more than 0.6Mpa to membrane capacitance module (6) internal pressure；Raw liquor pump (3) is shut down,
Inlet valve (13) is closed, lean solution produces water valve (14) and opens, and dope produces water valve (15) and closes, and clear liquid produces water valve (16) and closes；Film electricity
Molar block (6) off state, cleaning agent pumps (9) and squeezes into the solution of cleaning agent storage tank (8) in membrane capacitance module (6), wherein storing up
The solution deposited produces water valve (14) by lean solution and is back to collecting tank (2)；After membrane capacitance module (6) interior solution replacement, cleaning
Agent pumps (9) and lean solution produces water valve (14) and closes.
4. a kind of enrichment method of uranium solution according to claim 3, it is characterised in that: further include step 7: cleaning process
Terminate, returns to step 2.
5. a kind of enrichment method of uranium solution according to claim 3, it is characterised in that: in the step 1, collecting tank
(2) water quality pH6~10, uranium concentration are 5mg/L~100mg/L, 0~10000 μ s/cm of conductivity.
6. a kind of enrichment method of uranium solution according to claim 3, it is characterised in that: in the step 3, setting open circuit
Time t is 120s, positive charging conductivity X is 4400 μ s/cm, production water conductivity Y is 1200 μ s/cm, lean solution conductivity Z is 8000
μs/cm。
7. a kind of enrichment method of uranium solution according to claim 6, it is characterised in that: in the step 3.1, membrane capacitance
Module (6) charging voltage 1.1V；Bag filter (5) produces water and enters membrane capacitance module (6) by valve (13), through conductivity meter
(7) when detecting 1200 μ s/cm of conductivity >, lean solution produces water valve (14) and opens, and dope produces water valve (15), clear liquid produces water valve (16) and closes
It closes, solution produces water valve (14) through lean solution and returns to collecting tank (2)；When detecting conductivity≤1200 μ s/cm through conductivity meter (7), clearly
Liquid produces water valve (16), clear liquid discharging valve (17) is opened, and lean solution produces water valve (14) and dope produces water valve (15) and closes, wash water valve (18)
It closes, solution clear liquid produces water valve (16), clear liquid discharging valve (17) outlet recycles；When conductivity meter 7 detects conductivity > again
When 1200 μ s/cm, system enters next step membrane capacitance open circuit process.
8. a kind of enrichment method of uranium solution according to claim 7, it is characterised in that: in the step 3.2, open circuit
Duration is setting value t, and t takes 60.
9. a kind of enrichment method of uranium solution according to claim 8, it is characterised in that: in the step 3.3, through conductance
When rate instrument (7) detects conductivity≤8000 μ s/cm, lean solution produces water valve (14) and opens, and dope produces water valve (15), clear liquid produces water valve
(16) it closes, solution returns to system front end collecting-tank through valve (14), until system returns to film electricity when conductivity≤4400 μ s/cm
Molar block (6) positive charging process.
10. a kind of enrichment method of uranium solution according to claim 3, it is characterised in that: in the step 5, membrane capacitance
Module (6), which is shut down, impregnates 1~2h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112851005A (en) * | 2020-12-25 | 2021-05-28 | 核工业北京化工冶金研究院 | Zero-emission treatment system and method for uranium-containing underground water |
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| US20180282183A1 (en) * | 2016-12-12 | 2018-10-04 | Atlantis Technologies | Miniature capacitive deionization devices and related systems and methods |
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| JPH0931564A (en) * | 1995-07-19 | 1997-02-04 | Mitsubishi Electric Corp | Uranium enriching device |
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| CN105177289A (en) * | 2015-10-19 | 2015-12-23 | 核工业理化工程研究院 | Automatic purifying method for feed liquid with variable uranium concentration |
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