CN106683731B - Spent Radioactive liquid processing method, Spent Radioactive liquid processing device and equipment - Google Patents
Spent Radioactive liquid processing method, Spent Radioactive liquid processing device and equipment Download PDFInfo
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- CN106683731B CN106683731B CN201611207471.5A CN201611207471A CN106683731B CN 106683731 B CN106683731 B CN 106683731B CN 201611207471 A CN201611207471 A CN 201611207471A CN 106683731 B CN106683731 B CN 106683731B
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/04—Treating liquids
- G21F9/06—Processing
- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
Abstract
The invention discloses a kind of Spent Radioactive liquid processing method, Spent Radioactive liquid processing device and equipment.Radioactive liquid waste is handled by the liquid waste treating apparatus including first reactor and second reactor two-stage cascade, radionuclide amount is few in the second obtained supernatant, meets discharge standard.Energy consumption is small, treating capacity is big, and the radioactive solid waste amount of generation is less.
Description
Technical field
The present invention relates to liquid waste disposal technique field, more particularly, to a kind of Spent Radioactive liquid processing method, Spent Radioactive
Liquid processing device and equipment.
Background technology
Substantial amounts of middle low-activity waste liquid can be produced in nuclear power station operational process, the waste liquid containing radionuclide is for example direct
Discharge, will produce serious harm to health and natural environment.Therefore discharge mark is reached after must handling it
Standard could discharge.Be traditionally used for concentrating or separate the method for radionuclide in radioactive liquid waste mainly have evaporation, filtering, from
Son exchanges or is the combination of these technologies.By taking Daya Bay nuclear power plant as an example, process waste liquor uses " filtering+ion exchange+steaming
Hair " process, chemical waste fluid use " filtering+evaporation " process, and ground waste liquid uses " filtering+evaporation " process.
However, it is high energy consumption technique to be concentrated by evaporation, 1m is handled using evaporation concentration method3Low radioactive waste liquid, only energy consumption cost will
Reach thousands of members, do not meet with the energy saving and environmental-friendly sustainable energy development strategy for characteristic.A such as only TEU evaporation
Device for avoid the crystallization of concentrate boron need 24 it is small when keep stand-by heat recurrent state, and need in evaporation process input substantial amounts of
SVA auxiliary steams.Since TEU evaporations and TEP evaporators need to keep stand-by heat circular flow, its forced circulation pump for a long time
The failure-frequency of TEU006PO and TEP008/009PO is higher with respect to other pumps.And due to long-play, TEU/TEP evaporations
The radioactive dosage of device and its auxiliary device significantly raises, and needs strictly to control dosage and implement dosage and share in maintenance process,
Therefore corresponding maintenance cost and human cost are higher.In addition evaporator will produce a collection of 4m every year on average3The high radiation of left and right
Property concentrate, solid waste yield reaches 16 cubic metres or so after cement solidification, and the processing cost of solid waste is very high.Additionally due to need
With pipeline decontamination, complexing agent is often introduced into surfactant into chemical waste fluid, on evaporation process complexing agent and surface
Activating agent will cause concentrate largely to foam so as to influence the quality of distillate, due to being unable to control generation and the receipts of upstream waste liquid
Collection, TEU evaporator effectiveness are often influenced by concentrate foaming, influence treatment effect.
In addition, during by ion-exchange process Adsorption of Radioactive nucleic, the general pattern for using fixed bed reactors, radiation
Property waste liquid by be loaded with ion exchange resin fixed bed reactors occur ion exchange.But since ion exchange resin does not have
Selectivity, in the high waste liquid of salt content, resin is soon because conventional ion is failed by exchange saturation at the same time.Using Daya Gulf as
Example, for TEU except the mixed bed that salt bed configuration is two series connection, series is less, lacks preprocessing function, and do not possess selective desalination work(
Can, integrated treatment efficiency is low, and the clarification time is partially long.When TEU evaporators are unavailable, it is necessary to which the waste liquid of evaporation process can only pass through
Fluid reservoir is kept in, although removing salt bed purified treatment temporarily by one, due to this temporarily except salt bed capacity it is smaller and long when
Between operation be easy to cause radioactive dosage and raise rapidly, liquid waste processing is relatively difficult, it is necessary to set more storage tank to be put to store
Penetrating property waste liquid.Further, since containing more with nucleic existing for colloidal attitude in nuclear power station radioactive liquid waste, such as110mAg、58Co、60Co etc., be easy to be attached to causes to make ion exchange resin saturation on resin, evaporates and the treatment effect of ion exchange is all bad,
The cycle time of ion exchange resin, replace it is frequent, radioactive spent resin yield it is higher, it is necessary to stabilized and curing at
Reason, radioactive solid waste amount is more, and processing, disposal costs are sufficiently expensive, add the totle drilling cost of Radioactive waste management, this is
Nuclear power station urgent problem to be solved at present.
To sum up, the radioactive solid waste amount that traditional Spent Radioactive liquid processing method energy consumption is big, produces is more.
The content of the invention
Based on this, it is necessary to provide at the radioactive liquid waste that a kind of energy consumption is small, the radioactive solid waste amount of generation is less
Reason method and treating apparatus for radioactive waste liquid.
A kind of Spent Radioactive liquid processing device, including：
First reactor, is equipped with the first blender in the first reactor, the first reactor equipped with first into
Liquid mouth and the first liquid outlet, first inlet are used to flow into radioactive liquid waste in the first reactor, during use
Load the first adsorbent in the first reactor, first blender be used to stirring and evenly mixing the radioactive liquid waste with it is described
First adsorbent；And
Second reactor, is equipped with the second blender in the second reactor, the second reactor equipped with second into
Liquid mouth and the second liquid outlet, second inlet are connected with first liquid outlet by pipeline, and second inlet is used
The first supernatant for being formed is flowed into the second reactor after by first reactor processing, described second during use
Load the second adsorbent in reactor, second blender is used to stir and evenly mix first supernatant and the described second absorption
Agent, second liquid outlet are used for the second supernatant discharge second reaction that will be formed after second reactor processing
Device.
A kind for the treatment of apparatus for radioactive waste liquid, including at least the above Spent Radioactive liquid processing device, the Spent Radioactive
It is in be connected in parallel between liquid processing device.
A kind of Spent Radioactive liquid processing method, includes the following steps：
Above-mentioned Spent Radioactive liquid processing device or above-mentioned treating apparatus for radioactive waste liquid are provided；
Radioactive liquid waste is flowed into the first reactor, by first blender by the radioactive liquid waste with
First adsorbent stirs and evenly mixs, and first adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The first supernatant and the first precipitation are obtained after standing sedimentation；
First supernatant is flowed into the second reactor, by second blender by first supernatant
Liquid is stirred and evenly mixed with second adsorbent, and second adsorbent adsorbs the radionuclide in first supernatant；
The second supernatant and the second precipitation are obtained after standing sedimentation；And
When second supernatant meets discharge standard, second supernatant is discharged into the second reactor.
In one embodiment, it is described to flow into radioactive liquid waste before the operation in the first reactor, also wrap
The operation for collecting radioactive liquid waste is included, the radioactive liquid waste of collection is flowed into described first by way of in batches afterwards
In reactor, after first supernatant flows into the operation in the second reactor, flowed into the first reactor
Enter the radioactive liquid waste of next batch.
In one embodiment, the solid-to-liquid ratio of first adsorbent and the radioactive liquid waste is 20g/L~60g/
L, the solid-to-liquid ratio of second adsorbent and first supernatant is 20g/L~60g/L.
In one embodiment, the method, which is additionally included in, uses the Spent Radioactive liquid processing device or the radiation
Property waste liquor treatment equipment for a period of time after, replace first adsorbent in the first reactor, and by described first
Reactor and the liquid flow direction of the second reactor are exchanged, and described method includes following steps afterwards：
The radioactive liquid waste is flowed into the second reactor, by second blender by the Spent Radioactive
Liquid is stirred and evenly mixed with second adsorbent, and second adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The 3rd supernatant and the 3rd precipitation are obtained after standing sedimentation；
3rd supernatant is flowed into the first reactor, by first blender by the 3rd supernatant
First adsorbent after liquid and replacement stirs and evenly mixs, and first adsorbent after replacement is by the 3rd supernatant
Radionuclide absorption；
The 4th supernatant and the 4th precipitation are obtained after standing sedimentation；And
When the 4th supernatant meets discharge standard, the 4th supernatant is discharged into the first reactor.
In one embodiment, it is described to be inhaled the radioactive liquid waste and described first by first blender
In the attached dose of operation stirred and evenly mixed, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min；Described stand is sunk
In the operation that the first supernatant and the first precipitation are obtained after drop, the standing sedimentation time is 2min~3min.
In one embodiment, it is described to be adsorbed first supernatant and described second by second blender
In the operation that agent stirs and evenly mixs, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min；The standing sedimentation
In the operation for obtaining the second supernatant and the second precipitation afterwards, the standing sedimentation time is 2min~3min.
In one embodiment, first adsorbent includes inorganic adsorbing material and is coated on the inorganic adsorbent
Magnetic core carrier Fe on material3O4；Second adsorbent includes inorganic adsorbing material and is coated on the inorganic adsorbing material
On magnetic core carrier Fe3O4。
In one embodiment, the particle diameter of first adsorbent is 10 μm~30 μm, the grain of second adsorbent
Footpath is 10 μm~30 μm.
Above-mentioned Spent Radioactive liquid processing device is simple in structure, changes general use fixed bed reactors absorption mode, and
It is radioactive liquid waste is mixed with adsorbent by stirring radioactive liquid waste, by first reactor and second reactor two-stage
After adsorption treatment, radionuclide amount is few in the second obtained supernatant, meets discharge standard.Even existing for colloidal attitude
Nucleic, can also be handled, less energy consumption by above-mentioned Spent Radioactive liquid processing device, and the radioactive solid waste amount of generation is less.
The processing method of above-mentioned radioactive liquid waste, passes through the radiation including first reactor and second reactor two-stage cascade
Property liquid waste treating apparatus handle radioactive liquid waste, radioactive liquid waste flows into the first reactor equipped with the first adsorbent and carries out
Adsorption reaction, makes the mixing of radioactive liquid waste and the first adsorbent after the stirring of the first blender, the first adsorbent is by radioactive liquid waste
In radionuclide absorption.After standing sedimentation, most of radionuclide settles to form the first precipitation with the first adsorbent, and
First supernatant, which is flowed into the second reactor equipped with the second adsorbent, carries out adsorption reaction, makes first after the stirring of the second blender
Supernatant and the second adsorbent mix, and the second adsorbent adsorbs the radionuclide in the first supernatant.After standing sedimentation, put
Penetrating property nucleic settles to form the second precipitation with the second adsorbent.Test result indicates that reacted by first reactor and second
After device two-stage adsorption treatment, radionuclide amount is few in the second obtained supernatant, meets discharge standard.Even colloidal attitude
Existing nucleic, can also be adsorbed by the first adsorbent or the second adsorbent and be precipitated during standing sedimentation, therefore radiate
Property waste liquid can directly carry out two-stage adsorption treatment, can save the operation of evaporation process, energy consumption is small.First adsorbent and the second suction
Attached dose can be repeated several times use, and treating capacity is big, and the radioactive solid waste amount of generation is less.
Brief description of the drawings
Fig. 1 is the structure diagram of the Spent Radioactive liquid processing device of an embodiment；
Fig. 2 is the flow diagram when handling radioactive liquid waste of Spent Radioactive liquid processing device as shown in Figure 1；
Fig. 3 is the structure diagram of the treating apparatus for radioactive waste liquid of an embodiment；
Fig. 4 is the flow chart of the Spent Radioactive liquid processing method of an embodiment；
Fig. 5 is that the dosage of adsorbent in embodiment 1 is respectively to Cs under the conditions of 20g/L, 40g/L, 60g/L+Go
Except rate versus time curve figure；
Fig. 6 is the size distribution situation map that the adsorbent in embodiment 2 is measured using laser particle size analyzer；
Fig. 7 is the process schematic of sedimentation experiment in embodiment 2；
Fig. 8 is the decontamination factor of first reactor, the decontamination factor of second reactor and first reactor in embodiment 3
Decontamination factor with second reactor totality is with the curve map for handling batch variation；
Fig. 9 is the aqueous concentration of first reactor in embodiment 3 and the aqueous concentration of second reactor with processing batch
The curve map of change；
Figure 10 is the Cs of single batch in first reactor and second reactor in embodiment 3+The song of the change of adsorbance
Line chart；
The Cs added up in Figure 11 embodiments 3 in first reactor and second reactor+The curve map of adsorbance change；
Figure 12 is the decontamination factor of first reactor in embodiment 6, the decontamination factor of second reactor and the first reaction
Device and the decontamination factor of second reactor totality with the change of processing batch curve map；
Figure 13 is first reactor and second reactor when adsorbent dosage is respectively 40g/L and 60g/L in embodiment 6
Overall decontamination factor with the change of processing batch curve map.
Embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Embodiment be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of running counter to intension of the present invention, therefore the present invention is not limited to the specific embodiments disclosed below.
Referring to Fig. 1, the Spent Radioactive liquid processing device 10 of an embodiment, including first reactor 100, second are reacted
Device 200 and exhausted bath box 300.The first blender 110 is equipped with first reactor 100.Stirred in second reactor 200 equipped with second
Mix device 210.First reactor 100 is connected with second reactor 200.
Specifically, first reactor 100 is equipped with the first inlet 101 and the first liquid outlet 103, the first inlet 101
For radioactive liquid waste to be flowed into first reactor 100, second reactor 200 goes out equipped with the second inlet 201 and second
Liquid mouth 203, the first liquid outlet 103 are connected with the second inlet 201 by pipeline.Further, in the duct be equipped with switch, with
And kinetic pump is to control the flow rate of liquid.Load the first adsorbent, second reactor during use in first reactor 100
Load the second adsorbent in 200.
Exhausted bath box 300 is used to collect radioactive liquid waste, and exhausted bath box 300 passes through the first inlet 101 and first reactor 100
Connection.It is used to collect radioactive liquid waste by exhausted bath box 300, it is anti-radioactive liquid waste easily can be quantified into inflow first in batches
Answer in device 100 and second reactor 200.Certainly, in other embodiments, exhausted bath box 300 can also omit, nuclear power station fortune
The radioactive liquid waste produced during row can be flowed directly into first reactor 100 and handled.
In present embodiment, Spent Radioactive liquid processing device 10 includes first reactor 100 and second reactor 200,
In other embodiments, Spent Radioactive liquid processing device 10 can also include the 3rd be connected in series with second reactor 200
Reactor, the 4th reactor etc..
Specifically, the flow diagram that first reactor 100 handles radioactive liquid waste is as shown in Figure 2.Spent Radioactive liquid stream
After entering to be pre-loaded with the first reactor 100 of the first adsorbent, by the first blender 110 stir and evenly mix radioactive liquid waste with
First adsorbent, mixes radioactive liquid waste and the first adsorbent.Adsorbent adsorbs the radionuclide in radioactive liquid waste,
Radioactive liquid waste after processing, obtains the first supernatant and the first precipitation, the first supernatant in first reactor 100 after standing sedimentation
Liquid is flowed into second reactor 200 by the first liquid outlet 103.After a period of time, as needed, the first precipitation is discharged
Reactor, and supplement the first new adsorbent.
Specifically, Spent Radioactive liquid processing device 10 further includes solenoid valve, Spent Radioactive liquid processing device 10 1 is being used
After the section time, first reactor 100 and 200 liquid of second reactor flow direction can also be exchanged by solenoid valve, make full use of suction
Attached dose of adsorption capacity, on the premise of processing requirement is met, is reduced as far as radwaste yield.
Above-mentioned Spent Radioactive liquid processing device 10 is simple in structure, changes general use fixed bed reactors absorption mode,
But radioactive liquid waste is mixed with adsorbent by stirring radioactive liquid waste, reacted by first reactor 100 and second
After 200 two-stage adsorption treatment of device, radionuclide amount is few in the second obtained supernatant, meets discharge standard.Even glue
Nucleic existing for figure, can also be handled, less energy consumption, the solid radiation of generation gives up by above-mentioned Spent Radioactive liquid processing device 10
Object amount is less.
In addition, referring to Fig. 3, the present invention also provides an embodiment treating apparatus for radioactive waste liquid 20, Spent Radioactive
Liquid processing equipment 20 includes at least two above-mentioned Spent Radioactive liquid processing devices 10.In simultaneously between Spent Radioactive liquid processing device 10
Connection connection.
By the multiple Spent Radioactive liquid processing devices 10 being connected in parallel, a large amount of processing radioactive liquid wastes, place can be realized
Reason amount is big, realizes the continuity processing of radioactive liquid waste.
Above-mentioned treating apparatus for radioactive waste liquid 20 is simple in structure, possesses that effective, selectivity is strong, miniaturization, modularization, removable
The characteristics of property is strong is moved, it is low to the requirement of Site Service condition, it is complex and existing to be very suitable for nuclear power plant's radioactive liquid waste component
The limited particular/special requirement of field arrangement space.Such as many links of nuclear industry can produce low radioactive waste liquid, some of which low radioactive waste liquid
Generation is non-continuous, has dispersed feature in the time and space.Handled for these distributed low radioactive waste liquids, there is three
Kind alternative plan：1) each spaced point establishes processing unit；2) waste liquid is transported to unified centrostigma from spaced point
Handled；3) it is respectively processed using single or multiple wheeled apparatus to each spaced point.In each spaced point one by one
It is big to build the investment for the treatment of facility, equipment vacancy rate is high, it is also necessary to put into substantial amounts of fund and safeguarded and retired, while also need
It is equipped with and operator training, maintenance personnel and retiree, does not have economy.Low radioactive waste liquid is transported to system from spaced point
One centralized processing point is handled, and freight volume is big, and freight is high, environmental risk caused by liquid radioactive waste transport
Greatly, not permitted in regulation, without operability.The treating apparatus for radioactive waste liquid 20 of present embodiment is removable, according to
Need to be moved to each spaced point and be respectively processed, can not only evade the risk in transit of liquid radioactive waste, but also can be to avoid
Overlapping investment construction, improves utilization rate of equipment and installations, treating capacity is big, and energy consumption is small, and the radioactive solid waste amount of generation is less.
Referring to Fig. 4, the Spent Radioactive liquid processing method of an embodiment, includes the following steps S110~S160.
S110, provide Spent Radioactive liquid processing device or treating apparatus for radioactive waste liquid.
Specifically, the structure of Spent Radioactive liquid processing device is as shown in Figure 1, the structure such as figure for the treatment of apparatus for radioactive waste liquid
Shown in 3.
S120, by radioactive liquid waste flow into first reactor in, by the first blender by radioactive liquid waste with first suction
Attached dose stirs and evenly mixs, and the first adsorbent adsorbs the radionuclide in radioactive liquid waste.
Specifically, radioactive liquid waste can be low-activity waste liquid in being produced in nuclear power station operational process, the first reaction
The first adsorbent is pre-loaded with device.Radioactive liquid waste can be flowed into first reactor by pipeline.
Specifically, the first adsorbent can be a kind of particle for being capable of Adsorption of Radioactive nucleic.In present embodiment, first
The particle diameter of adsorbent is 10 μm~30 μm.After agitated, the first adsorbent can be suspended in radioactive liquid waste, thus with radiation
Property waste liquid fully mix, adsorb waste liquid in radionuclide.For a period of time, the first adsorbent can settle standing sedimentation, real
Existing separation of solid and liquid.
In present embodiment, the first adsorbent includes inorganic adsorbing material and the magnetic core being coated on inorganic adsorbing material
Carrier Fe3O4。
Inorganic adsorbing material, can putting from high salt amount to the high selectivity of main trace nucleic Cs, Sr, Co, Ag, I etc.
Target species ion is efficiently removed in penetrating property waste liquid, the radioactive activity of waste liquid can quickly be greatly lowered, non-put is coexisted
The influence of ion is smaller, therefore service life is grown, and quantity of solid waste is small.After the absorption of the first adsorbent, substantial amounts of radioactive nucleus
Element is enriched in the first adsorbent of solid-state of small size, is easy to radiation protection.Compared to spent resin, what inorganic adsorbing material produced
Radioactive waste heat endurance and chemical stability is good, radiation-resistant property is strong, is not easy, by RADIATION DECOMPOSITION or biological decomposition, to be easy to
The processing disposal in later stage, during underground disposal head's phase stores, has more long-term safety.Coated on inorganic adsorbing material
Magnetic core carrier Fe3O4, after the completion of stirring and adsorbing, the first adsorbent can quickly be settled by the principle of electromagnetic induction, into one
Step improves treatment effeciency.
It will be appreciated, of course, that in other embodiments, the first adsorbent can not also have by magnetism, pass through gravity
Also the first adsorbent can be settled.
After radioactive liquid waste is flowed into first reactor, radioactive liquid waste is stirred in the first reactor, makes radiation
Property waste liquid and the first adsorbent mix, the first adsorbent by radioactive liquid waste radionuclide adsorb.By stirring operation,
It can accelerate the first adsorbent to complete to adsorb in a short time with radioactive liquid waste, shorten the reaction time.
In present embodiment, change general use fixed bed reactors absorption mode, but by stirring Spent Radioactive
Liquid mixes radioactive liquid waste and the first adsorbent.Specifically, radioactive liquid waste and first are adsorbed by the first blender
In the operation that agent stirs and evenly mixs, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min.The results showed
2min~3min is stirred, removal rate i.e. reachable more than 99% of radionuclide, treatment effeciency significantly improves, and suitable treatment is dashed forward
A large amount of radioactive liquid wastes that hair event produces.
The first supernatant and the first precipitation are obtained after S130, standing sedimentation.
After the completion of radioactive liquid waste and the first adsorbent adsorption reaction, a period of time is stood, realizes separation of solid and liquid so as to obtain
Precipitated to the first supernatant and first.First supernatant further can be flowed into flow into equipped with the second adsorbent the by pipeline
Handled in two reactors.And the radioactive liquid waste of next batch can be again flowed into first reactor, the first adsorbent without
Need to take out, repeat the multiple batches of radioactive liquid waste of processing, until the first adsorbent reaches saturation, then mended into first reactor
Fill the first new adsorbent.
Specifically, being obtained after standing sedimentation in the first supernatant and the first operation precipitated, the standing sedimentation time is 2min
~3min.The results showed preferable separation of solid and liquid can be achieved in standing sedimentation 2min~3min.Most of radionuclide with
First adsorbent settles to form the first precipitation.Compared to ion-exchange process, present embodiment is promoted by the way of stirring and evenly mixing
First adsorbent and radioactive liquid waste adsorption reaction, realize separation of solid and liquid, the first adsorbent by the way of standing sedimentation afterwards
The multiple batches of radioactive liquid waste of repeatable processing, the radioactive solid waste amount of generation are less.
S140, by the first supernatant liquid stream second reactor obtained in S130, by the second blender by the first supernatant
Liquid is stirred and evenly mixed with the second adsorbent, and the second adsorbent adsorbs the radionuclide in the first supernatant.
After the first supernatant and the first precipitation are obtained after standing sedimentation, the first supernatant is flowed into equipped with the second adsorbent
Second reactor in be further processed.Specifically, the first supernatant can be flowed into second reactor by pipeline.
Specifically, the second adsorbent can be a kind of particle for being capable of Adsorption of Radioactive nucleic.In present embodiment, second
The particle diameter of adsorbent is 10 μm~30 μm.After agitated, the second adsorbent can be suspended in the first supernatant, so that with first
Supernatant fully mixes, and adsorbs the radionuclide in the first supernatant.For a period of time, the second adsorbent can sink standing sedimentation
Drop, realizes separation of solid and liquid.
In present embodiment, the second adsorbent includes inorganic adsorbing material and the magnetic core being coated on inorganic adsorbing material
Carrier Fe3O4.Inorganic adsorbing material, can putting from high salt amount to the high selectivity of main trace nucleic Cs, Sr, Co, Ag, I etc.
Target species ion is efficiently removed in penetrating property waste liquid, the radioactive activity of waste liquid can quickly be greatly lowered, non-put is coexisted
The influence of ion is smaller, therefore service life is grown, and quantity of solid waste is small.After the absorption of the second adsorbent, radionuclide enrichment
In the second adsorbent of solid-state of small size, it is easy to radiation protection.Magnetic core carrier Fe is coated on inorganic adsorbing material3O4, when stirring
After the completion of mixing absorption, the second adsorbent can quickly be settled by the principle of electromagnetic induction, further improve treatment effeciency.
It will be appreciated, of course, that in other embodiments, the second adsorbent can not also have by magnetism, pass through gravity
Also the second adsorbent can be settled.
Specifically, the first adsorbent is identical with the second sorbent material, and after the absorption of two-stage sequencing batch type, Spent Radioactive
Radionuclide in liquid is adsorbed by the first adsorbent and the second adsorbent substantially, so as to reach discharge standard.First absorption
Agent and the second adsorbent can repeatedly use, and without taking out after single treatment, reduce radioactive solid waste amount.
After first supernatant is flowed into second reactor, the first supernatant is stirred in the second reactor, makes first
Supernatant and the second adsorbent mix, and the second adsorbent adsorbs remaining radionuclide in the first supernatant.Pass through stirring
Operation, can accelerate the second adsorbent and complete to adsorb in a short time with the first supernatant, shorten the reaction time.
Specifically, being stirred and evenly mixed the first supernatant and the second adsorbent by the second blender, stir speed (S.S.) is
250rpm~350rpm, mixing time are 2min~3min.Second adsorbent, which repeats, handles the first multiple batches of supernatant.
The second supernatant and the second precipitation are obtained after S150, standing sedimentation.
After the completion of first supernatant and the second adsorbent adsorption reaction, a period of time is stood, realizes separation of solid and liquid so as to obtain
Precipitated to the second supernatant and second.When the second supernatant meets discharge standard, the second supernatant is discharged into second reactor.
The first supernatant of next batch can be again flowed into second reactor, repeats the first multiple batches of supernatant of processing, until
Second adsorbent reaches saturation, then the second new adsorbent is supplemented into second reactor.
Specifically, being obtained after standing sedimentation in the second supernatant and the second operation precipitated, the standing sedimentation time is 2min
~3min.The results showed preferable separation of solid and liquid can be achieved in standing sedimentation 2min~3min.It is remaining in first supernatant
Radionuclide settles to form the second precipitation with the second adsorbent.Without taking out after the second adsorbent after sedimentation, the second adsorbent
The first multiple batches of supernatant of repeatable processing, until the second adsorbent reaches saturation, then is supplemented newly into second reactor
Second adsorbent, the radioactive solid waste amount of generation are less.
S160, when the second supernatant meets discharge standard, by the second supernatant discharge second reactor.
Specifically, after first reactor and the adsorption treatment of second reactor two-stage sequencing batch type, in detection second
Whether the radionuclide in clear liquid meets discharge standard, and when the second supernatant meets discharge standard, the second supernatant is arranged
Go out second reactor, the radioactive liquid waste processing of the batch is completed.
If the second supernatant is not up to discharge standard, the second supernatant further can be flowed into what is be connected with second reactor
3rd reactor, the 4th reactor being connected with the 3rd reactor ... handled, until discharge supernatant reach discharge
Standard.
In present embodiment, radioactive liquid waste is flowed into before the operation in the first reactor equipped with the first adsorbent,
The operation for collecting radioactive liquid waste is further included, flows into the radioactive liquid waste of collection equipped with the first absorption by way of in batches
In the first reactor of agent, after operation in the second reactor that the first supernatant flows into equipped with the second adsorbent, to the
The radioactive liquid waste of next batch is flowed into one reactor.Handle in batches, realize the continuity processing of radioactive liquid waste processing.
Specifically, can be as needed, the amount of the radioactive liquid waste of distribution every batch of processing.Specifically, the first adsorbent with
The solid-to-liquid ratio of radioactive liquid waste is 20g/L~60g/L.Effective volume in first reactor per 1L, corresponding input 20g~
The first adsorbent of 60g.The influx of second adsorbent is 20g/L~60g/L.Effective volume in second reactor per 1L,
The second adsorbent of corresponding input 20g~60g.Show through result of the test, the first adsorbent and the are put into by above-mentioned dosage
Two adsorbents, good adsorption capacity, the first adsorbent and second are kept after can handling the radioactive liquid waste of more than 70 batches
Adsorbent is reused, and effectively reduces the radioactive solid waste amount produced.
In present embodiment, Spent Radioactive liquid processing method is additionally included in using Spent Radioactive liquid processing device or radioactivity
Waste liquor treatment equipment for a period of time after, replace first reactor in the first adsorbent, by first reactor with second reaction
Liquid flow direction in device is exchanged, and this method comprises the following steps afterwards：Radioactive liquid waste is flowed into second reactor, by the
Two blenders stir and evenly mix radioactive liquid waste and the second adsorbent, and the second adsorbent is by the radionuclide in radioactive liquid waste
Adsorb, the 3rd supernatant and the 3rd precipitation are obtained after standing sedimentation.3rd supernatant is flowed into first reactor.Pass through first
First adsorbent of the blender by the 3rd supernatant and after replacing stirs and evenly mixs, and the first adsorbent after replacement is by the 3rd supernatant
Radionuclide absorption in liquid.The 4th supernatant and the 4th precipitation are obtained after standing sedimentation.When the 4th supernatant meets discharge
During standard, the 4th supernatant is discharged into first reactor.
Since the radionuclide concentration level of the radioactive liquid waste handled in first reactor is higher, the first reaction
There is failure state first in the first adsorbent in device, and the second adsorbent in second reactor also has good suction at this time
Attached activity.At this time, the operation of discharge adsorbent can be only carried out to first reactor, and loads the first new adsorbent, and the
The second adsorbent in two reactors is changed without.Then first reactor and second reactor liquid flow direction are exchanged, i.e., it is original
First reactor and second reactor backward operation.Radioactive liquid waste is flowed into the second reactor equipped with the second adsorbent
In.By the way that first reactor and second reactor liquid flow direction are exchanged, the second adsorbent in second reactor can repeat
It is used for multiple times, and first adsorbent of the water exit end always in first reactor is new adsorbent, ensures the purification requirement of water outlet.
Specifically, the switching of the processing sequence of first reactor and second reactor relies on solenoid valve control.Present embodiment can fill
Divide the adsorption capacity using adsorbent, on the premise of processing requirement is met, be reduced as far as radwaste yield.
Above-mentioned Spent Radioactive liquid processing method obtains after first reactor and second reactor two-stage adsorption treatment
The second supernatant in radionuclide amount it is few, meet discharge standard., also can be by first even nucleic existing for colloidal attitude
Adsorbent or the absorption of the second adsorbent, so that precipitated during standing sedimentation, therefore radioactive liquid waste can directly carry out two
Level adsorption treatment, can save the operation of evaporation process, and energy consumption is small.First adsorbent and the second adsorbent, which can be repeated several times, to be made
With treating capacity is big, and the radioactive solid waste amount of generation is less.
It is specific embodiment part below.
In following embodiments, the radionuclide in radioactive liquid waste is Cs+, the first adsorbent and the second adsorbent phase
What is answered is that can adsorb Cs+Adsorbent.The method is conventional method, the raw material and detection institute unless otherwise instructed
It can be obtained unless otherwise instructed from open commercial sources with standardizing chemical reagent.
In all of the embodiments illustrated, Cs before and after absorption+The concentration using plasma mass spectrum (ICP-MS) of ion measures.
Performance of the adsorbent uses Cs+The removal rate of ion represents.Removal rate RRt(%) as shown in following formula 1,
Wherein, RRtFor Cs (I) removal rate of t moment, C0For raw water Cs+Concentration (mg/L), CtFor t moment solution C s+Concentration
(mg/L)。
Embodiment 1
The micron order magnetic core cladded type ferrocyanide that the adsorbent selected in the present embodiment is voluntarily developed removes caesium adsorbent
(Chinese invention patent ZL201210347269.8).Adsorbent is tested to target species Cs+Removal capacity.Respectively in reactor
The interior adsorbent for flowing into 20g/L, 40g/L and 60g/L carries out batch experiment, and research adsorbent is to Cs in solution+Absorption situation.
Radioactive liquid waste uses CsNO3Tap water (about 980 μ s/cm of electrical conductivity, 550~750mg/L of corresponding salinity) is dissolved in prepare, Cs+
Concentration is 1.5mg/L.Within the 13min that reaction is stirred under the conditions of 300rpm, specific point in time sampling (sample volume is chosen
The ratio for accounting for overall solution volume is small to ignoring), and analyze wherein Cs+Concentration, Cs (I) is calculated by above formula (1)
Removal rate.Removal rate under the conditions of the dosage of different adsorbents maps t, as shown in Figure 5.Result of the test is visible：Inhale
Attached dose of dosage is bigger, faster to the removal speed of Cs (I).Under the conditions of each dosage, most of Cs+Gone in 2min
Remove.Specifically in 2min, 3min and 5min to Cs+Removal rate data such as table 1 below.
Table 1：Adsorbent is under different dosages to the removal rate (%) of Cs (I)
Data above surface, in 2min, Cs when dosage is 20g/L+Removal rate removal rate when being 99.3%, 40g/L
For 99.6%, 60g/L when removal rate up to 99.9%, be hereafter further added by the reaction time, removal rate no longer substantially increases.Thus may be used
See, stirring and adsorbing reaction time 2min or so, adsorbent can adsorb the radionuclide in radioactive liquid waste.
Embodiment 2
The adsorbent selected in the present embodiment is the micron order magnetic core cladded type ferrocyanide voluntarily developed except caesium adsorbs
Agent (Chinese invention patent ZL201210347269.8).Experiment determines the gravitational settling time with verification adsorbent.
Caesium adsorbent is removed to magnetism selected in this present embodiment, we also test carries out Magneto separate using externally-applied magnetic field
The experiment of sedimentation.In experiment, electric circle is wound in reactor outer wall, externally-applied magnetic field can be both produced after energization, adsorbent was at several seconds
Among can just be attracted on completely on reactor wall, complete the quick separating of solid liquid phase.In view of in nuclear power station actual motion,
Simplify structure design and the operation of reactor as far as possible, therefore by taking this magnetic adsorbent as an example, the high spot reviews gravity of adsorbent
Settling property.
The free settling process of individual particle in media as well can be divided into boost phase and constant velocity stage.For little particle
Speech, boost phase is usually extremely short, can ignore.Then, it is at the uniform velocity process that whole infall process, which can be assumed that,.
Stokes sedimentation formula (2) described sinking speed is the final speed of infall process, i.e. constant velocity stage
Sinking speed u0It can be calculated and obtained by following formula：
Wherein, g is acceleration of gravity, and r is particle radius, and ρ is grain density, and ρ ' is the density of liquid medium, and η is liquid
The viscosity of medium.
The size distribution situation of the adsorbent in the present embodiment is measured using laser particle size analyzer, as shown in Figure 6.Grain
For footpath substrate between 10 μm~30 μm, median is 23.35 μm.
Measure the density of adsorbent is about 4.0g/mL, the density of aqueous is 1.0g/mL, viscosity 0.001Pa
S, then the particle sinking speed calculated according to Stokes sedimentation formula is 3.56mm/s.For being applicable in for proof theory sinking speed
Property, the graduated cylinder of 500mL is selected, diameter about 5cm, high about 25cm carry out sedimentation experiment, test process photo referring to attached drawing 7.Design
In theoretical sinking speed 3.56mm/s can be used as reference, then theoretical sinking speed calculate needed for the sedimentation time be 1.17min.
Experimental result shows that solution is clarified completely in 1min to 2min, illustrates that use meets preferably with actual result.Above-mentioned sedimentation
The research of speed shows, it is not necessary to which, by externally-applied magnetic field, adsorbent can just realize preferable separation of solid and liquid in 2min.Therefore can
Remove externally-applied magnetic field, system can be made more simple and reliable, reduce running control and operation.
Embodiment 3
The micron order magnetic core cladded type that the first adsorbent and the second adsorbent selected in the present embodiment are voluntarily developed is sub-
The iron cyanide removes caesium adsorbent (Chinese invention patent ZL201210347269.8).Two-stage sequencing batch type reactor is employed, is tested
It is to Cs+Removal capacity.In laboratory conditions, using Spent Radioactive liquid processing device (two-stage sequencing batch type as shown in Figure 1
Reactor) carry out batch experiment.Wherein radioactive liquid waste uses CsNO3It is dissolved in tap water (about 980 μ s/cm of electrical conductivity, corresponding salt
550~750mg/L of concentration) prepare, Cs+Concentration is 1.5mg/L, and the effective volume of first reactor and second reactor is
1L.The first adsorbent and the quality that adds of the second adsorbent flowed into first reactor and second reactor be
40g, is 1L per batch processing water.In experiment, radioactive liquid waste initially enters first reactor, anti-under 300rpm mixing speeds
2.5min, standing sedimentation 2.5min is answered to obtain the first supernatant and the first precipitation.The first supernatant samples of part are taken to carry out Cs+It is dense
Degree detection and the first supernatant, which flow into, to be equipped with the second reactor of the second adsorbent.Stirred in the second reactor with 300rpm
After reacting 2.5min, standing sedimentation 2.5min under speed, the second supernatant and the second precipitation are obtained.Take part the second supernatant sample
Product carry out Cs+Concentration Testing, when the second supernatant meets discharge standard, second reactor is discharged by the second supernatant.When
One supernatant is flowed into after the operation in the second reactor equipped with the second adsorbent, and next batch is flowed into first reactor
Radioactive liquid waste.So move in circles.Use the primary effluent sample (the first supernatant samples) of ICP-MS measurement each batches
With the Cs in secondary effluent sample (the second supernatant samples)+Concentration, and calculate decontamination factor DF according to (3) formula：
Wherein, CinTo enter the water inlet Cs of corresponding reactor+Concentration (mg/L), CoutFor corresponding reactor
Water outlet Cs+Concentration (mg/L), DF are decontamination factor.
After tested, the decontamination factor of first reactor, the decontamination factor of second reactor and first reactor and second
For the decontamination factor of reactor totality with the situation of change of processing batch as shown in figure 8, abscissa is processing batch, ordinate is to go
The logarithm of the dirty factor, it is similar in the figure of following decontamination factor.Specifically, aqueous concentration (the first supernatant C s of first reactor+
Concentration) and second reactor aqueous concentration (the second supernatant C s+Concentration) with situation of change such as Fig. 9 institutes of processing batch
Show.The Cs of single batch in first reactor and second reactor+The situation of change of adsorbance is as shown in Figure 10.First reactor
And the Cs added up in second reactor+Adsorbance situation of change is as shown in figure 11.
It can be seen from the results above that Spent Radioactive liquid processing method through this embodiment handles 70 batches (70L)
After radioactive liquid waste, the decontamination factor of first reactor and second reactor totality is still higher, has good dirt-removing power.
In the starting stage, the decontamination factor of first reactor is more than 1000.With processing batch increase, the primary effluent of first reactor
Concentration gradually increases, and first order decontamination factor is gradually reduced.Since primary effluent concentration increases, the effect that second reactor plays
More and more obvious, the decontamination factor of second reactor increases with the increase of processing batch.The overall removal of soils of two-stage reactor because
Son remains to be remained above 1000 after 70 batches of radioactive wastewaters are handled.
In nuclear industry, processing need to be passed through and store for a long time by being enriched the discarded adsorbent of radionuclide, therefore be radiated
The volume of property waste should small quantization.After tested in the present embodiment, under conditions of meeting that decontamination factor is more than 1000, processing
What the radioactive wastewater of 70L produced discards adsorbent only 40g (about 10mL), treating capacity and waste yield volume ratio containing Cs (I)
For 7000.Two-stage sequencing batch type liquid waste treating apparatus can make full use of the adsorption capacity of adsorbent, before processing requirement is met
Put, be reduced as far as radwaste yield.
Embodiment 4
In the present embodiment, radioactive liquid waste is first handled using the method for embodiment 3, when the decontamination factor of first reactor subtracts
It is small to a certain extent when (being, for example, less than 1000) when, it is meant that the adsorbent in reactor will exhaust, pass through be filtered by vacuum dress
Put and discharge the first adsorbent, load the first new adsorbent in the first reactor, and second in second reactor is adsorbed
Agent is changed without.Then first reactor and the liquid flow direction in second reactor are exchanged, the first of the first adsorbent will be updated
Reactor is used as the second level in ensuing processing procedure, and using second reactor (the second stage reactor before) as
Level-one uses, and to improve adsorbent utilization rate, ensures outlet effect, reduces radwaste yield.
Embodiment 5
The micron order magnetic core cladded type that the first adsorbent and the second adsorbent selected in the present embodiment are voluntarily developed is sub-
The iron cyanide removes caesium adsorbent (Chinese invention patent ZL201210347269.8).According to the two-stage reactor examination in embodiment 3
Test as a result, devising treating apparatus for radioactive waste liquid as shown in Figure 3.The treating apparatus for radioactive waste liquid include two it is in parallel
Liquid waste treating apparatus.The mode of two-way parallel connection is taken to run, the height for setting single reactor is 45cm, and basal diameter is
50cm, per reactor effective volume about 85L single all the way.After tested, in the case where ensureing that the overall removal of soils factor is more than 1000,
The treatment scale of the equipment is set to reach 1t/h (ton hour).Treating apparatus for radioactive waste liquid operation can be divided into four-stage, respectively
To intake, adsorbing, precipitating, water outlet.Cs in waste liquid+Concentration for 1.5mg/L, water inlet, absorption, precipitation, water outlet stage are each
2.5min.One batch processed needs 10min, can handle 6 batches per hour.
It is 40g/L that adsorbent, which adds solid-to-liquid ratio, i.e., each reactor adsorbent adds quality about 3400g.The two-way is in parallel
The operational mode of two-stage reactor is：Intake, adsorb in operation, precipitation, each 2.5min of water outlet stage.When 1-A reactors are in
During the water outlet stage of a cycle, 1-B initially enters the fill phase of a cycle；Subsequent 2.5min, 1-A are water inlet rank
Section, 1-B is absorption phase；2.5min afterwards, 1-A are absorption phase, and 1-B is precipitate phase；Ensuing 2.5min, 1-A are
Precipitate phase, 1-B are water outlet stage；When 1-A enters the water outlet stage of second round, 1-B is just into second period
Fill phase.The linked manner of 2-A and 2-B reactors is also such.And so on circulate, until water outlet Cs+Concentration does not reach
Untill it is required that.
Test method test decontamination factor in embodiment 3.(the water outlet Cs when the overall removal of soils factor is 1000+It is dense
When degree reaches the one thousandth of influent concentration), whole equipment runs about 70 circulations, and the amount of disposing waste liquid about 11900L, produces useless
Abandon adsorbent about 6.8kg (about 1.7L), treating capacity and waste yield volume ratio about 7000.The treating capacity of the equipment is big, processing
Efficient, radwaste yield is small.
Embodiment 6
The effect of enhanced processing amount on the Spent Radioactive liquid processing method processing plant production line of the present embodiment test present invention
Fruit.First adsorbent and the second adsorbent are magnetic core cladded type ferrocyanide except caesium adsorbent (passes through Chinese invention patent
Prepared after the method industry extension production of ZL201210347269.8), it prepares the first adsorbent and the second adsorbent is adopted
Magnetic core is the industrial magnetic powder of 100 mesh.Using Spent Radioactive liquid processing device 10 as shown in Figure 1, (two-stage sequencing batch type reacts
Device) carry out batch experiment.Each reactor dischargeable capacity is 20L, and every batch of processing water is 20L.Devised in reactor certainly
Dynamic control, switches over a two level, and water inlet and draining are automatically stopped by Liquid level after set batch number is completed
Operation.The disposition of two groups of difference adsorbent dosages is tested respectively.Adsorbent dosage in each reactor in first group
For 40g/L, it is 3min to control stirring and adsorbing reaction time and standing sedimentation time.Adsorbent in each reactor in second group
Dosage is 60g/L, and it is 3min to control stirring and adsorbing reaction time and standing sedimentation time.First group of experiment is thrown when adsorbent
When dosage is 40g/L, the decontamination factor of first reactor, the decontamination factor of second reactor and first reactor and second anti-
Answer the decontamination factor of device totality as shown in figure 12 with the situation of change of processing batch.It can be recognized from fig. 12 that with processing batch
Increase, the decontamination factor of first reactor is gradually reduced, and the decontamination factor of second reactor gradually increases, first reactor and
The overall removal of soils factor of second reactor totality slowly reduces, and decontamination factor is reduced to after about 30 batch raw waters are handled
1000, handle about 70 batch raw waters and be reduced to 100 afterwards.If it is required that decontamination factor be more than 1000, then by processing 30
Batch calculates, the enrichment Cs that processing 600L raw waters produce+Discarded adsorbent be 800g, treating capacity and the volume of waste yield
Than for 3000.Under conditions of meeting that decontamination factor is more than 100, respective volume ratio is 7000.Illustrate that the method for the present invention is expanding
In big industrial production practical application, treatment effeciency is still higher, and radwaste yield is small.
If Figure 13 is the decontamination factor of first reactor and second reactor totality in first group of experiment and second group of experiment
With the situation of change of processing batch.It can be seen that from Figure 13 results when adsorbent dosage brings up to 60g/L from 40g/L,
React incipient stage Cs+Decontamination factor be obviously improved, under conditions of meeting decontamination factor 1000, can will processing batch be carried from 30
It is high to 70 batches.As it can be seen that adsorbent dosage improves 50%, decontamination factor handles batch raising more than 1000 for experiment
One times.As it can be seen that adsorbent dosage is brought up to 60g/L from 40g/L from experiment, had no significant effect to stirring, settling etc..
Therefore the balance of detersive efficiency and quantity of solid waste should be considered, with preferably suitable adsorbent dosage.Second group of experiment
In, meet that decontamination factor can handle 70 batches under conditions of being 1000, that is, handle 1400 liters of waste water, produce solid waste 1200
Gram, wastewater treatment capacity and waste yield volume ratio are 4600, illustrate that the method for the present invention is answered widened industrial production is actual
In, treatment effeciency is still higher, and radwaste yield is small.
Embodiment described above only expresses the several embodiments of the present invention, its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (8)
1. a kind of Spent Radioactive liquid processing method, it is characterised in that include the following steps：
Spent Radioactive liquid processing device or treating apparatus for radioactive waste liquid are provided, wherein, the Spent Radioactive liquid processing device bag
First reactor and second reactor are included, is equipped with the first blender in the first reactor, the first reactor is equipped with
First inlet and the first liquid outlet, first inlet are used to flow into radioactive liquid waste in the first reactor, make
Used time loads the first adsorbent in the first reactor, and first blender is used to stir and evenly mix the radioactive liquid waste
With first adsorbent, the second reactor is interior to be equipped with the second blender, and the second reactor is equipped with the second feed liquor
Mouth and the second liquid outlet, second inlet are connected with first liquid outlet by pipeline, and second inlet is used for
The first supernatant for being formed after first reactor processing is flowed into the second reactor, when use is anti-described second
Answer and load the second adsorbent in device, second blender is used to stir and evenly mix first supernatant and the described second absorption
Agent, second liquid outlet are used for the second supernatant discharge second reaction that will be formed after second reactor processing
Device, the treating apparatus for radioactive waste liquid include at least two Spent Radioactive liquid processing devices, at the radioactive liquid waste
It is in be connected in parallel between reason device；Radioactive liquid waste is flowed into the first reactor, by first blender by institute
State radioactive liquid waste to stir and evenly mix with first adsorbent, first adsorbent is by the radioactivity in the radioactive liquid waste
Nucleic adsorbs；
The first supernatant and the first precipitation are obtained after standing sedimentation；
First supernatant is flowed into the second reactor, by second blender will first supernatant and
Second adsorbent stirs and evenly mixs, and second adsorbent adsorbs the radionuclide in first supernatant；
The second supernatant and the second precipitation are obtained after standing sedimentation；And
When second supernatant meets discharge standard, second supernatant is discharged into the second reactor.
2. Spent Radioactive liquid processing method according to claim 1, it is characterised in that described that radioactive liquid waste is flowed into institute
Before stating the operation in first reactor, the operation for collecting radioactive liquid waste is further included, will be received by way of in batches afterwards
The radioactive liquid waste of collection is flowed into the first reactor, when first supernatant is flowed into the second reactor
After operation, the radioactive liquid waste of next batch is flowed into the first reactor.
3. Spent Radioactive liquid processing method according to claim 1, it is characterised in that first adsorbent is put with described
The solid-to-liquid ratio of penetrating property waste liquid is 20g/L~60g/L, and the solid-to-liquid ratio of second adsorbent and first supernatant is 20g/L
~60g/L.
4. Spent Radioactive liquid processing method according to claim 1, it is characterised in that the method is additionally included in using institute
After stating Spent Radioactive liquid processing device or the treating apparatus for radioactive waste liquid for a period of time, replace in the first reactor
First adsorbent, and the liquid flow direction of the first reactor and the second reactor is exchanged, afterwards the side
Method includes the following steps：
The radioactive liquid waste is flowed into the second reactor, by second blender by the radioactive liquid waste with
Second adsorbent stirs and evenly mixs, and second adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The 3rd supernatant and the 3rd precipitation are obtained after standing sedimentation；
3rd supernatant is flowed into the first reactor, by first blender by the 3rd supernatant with
And first adsorbent after replacing stirs and evenly mixs, first adsorbent after replacement is by putting in the 3rd supernatant
Penetrating property nucleic adsorbs；
The 4th supernatant and the 4th precipitation are obtained after standing sedimentation；And
When the 4th supernatant meets discharge standard, the 4th supernatant is discharged into the first reactor.
5. Spent Radioactive liquid processing method according to claim 1, it is characterised in that described to pass through first blender
In the operation that the radioactive liquid waste and first adsorbent are stirred and evenly mixed, stir speed (S.S.) is 250rpm~350rpm,
Mixing time is 2min~3min；In the operation that the first supernatant and the first precipitation are obtained after the standing sedimentation, standing sedimentation
Time is 2min~3min.
6. Spent Radioactive liquid processing method according to claim 1, it is characterised in that described to pass through second blender
In the operation that first supernatant and second adsorbent are stirred and evenly mixed, stir speed (S.S.) is 250rpm~350rpm, is stirred
It is 2min~3min to mix the time；In the operation that the second supernatant and the second precipitation are obtained after the standing sedimentation, during standing sedimentation
Between be 2min~3min.
7. Spent Radioactive liquid processing method according to claim 1, it is characterised in that first adsorbent includes inorganic
Sorbing material and the magnetic core carrier Fe being coated on the inorganic adsorbing material3O4；Second adsorbent includes inorganic adsorbent
Material and the magnetic core carrier Fe3O4 being coated on the inorganic adsorbing material.
8. Spent Radioactive liquid processing method according to claim 1, it is characterised in that the particle diameter of first adsorbent is
10 μm~30 μm, the particle diameter of second adsorbent is 10 μm~30 μm.
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