CN106683731A - Radioactive waste liquid treating method, radioactive waste liquid treating device and facility - Google Patents
Radioactive waste liquid treating method, radioactive waste liquid treating device and facility Download PDFInfo
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- CN106683731A CN106683731A CN201611207471.5A CN201611207471A CN106683731A CN 106683731 A CN106683731 A CN 106683731A CN 201611207471 A CN201611207471 A CN 201611207471A CN 106683731 A CN106683731 A CN 106683731A
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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
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- G21F9/12—Processing by absorption; by adsorption; by ion-exchange
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Abstract
The invention discloses a radioactive waste liquid treating method, a radioactive waste liquid treating device and a facility. Radioactive waste liquid is treated by the two-stage cascade radioactive waste liquid treating device including a first reactor and a second reactor, the obtained radionuclide content in second radionuclide is small and meets the discharge standard. The energy consumption is low, the handling capacity is large, and the amount of produced radioactive solid waste is small.
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 running, the waste liquid containing radionuclide is as directly
Discharge, will produce serious harm to health and natural environment.Therefore discharge mark is reached after must processing it
Standard could be discharged.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 FOR TREATMENT, using " filtering+evaporation " PROCESS FOR TREATMENT, ground waste liquid is using " filtering+evaporation " PROCESS FOR TREATMENT for chemical waste fluid.
However, it is high energy consumption technique to be concentrated by evaporation, 1m is processed using evaporation concentration method3Low radioactive waste liquid, only energy consumption cost will
Thousands of units are reached, is not met with energy-conservation and the environment-friendly sustainable energy development strategy as characteristic.Such as only one TEU evaporation
Device needs to keep within 24 hours stand-by heat recurrent state to avoid concentrate boron from crystallizing, and needs input substantial amounts of in evaporation process
SVA auxiliary steams.Because TEU evaporations and TEP evaporators need to for a long time keep stand-by heat circular flow, its forced circulation pump
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 is significantly raised, 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 radiation high 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 needing
With pipeline decontamination, to be often introduced into complexing agent and surfactant to 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, generation and receipts due to uncontrollable upstream waste liquid
Collection, TEU evaporator effectiveness is often influenceed by concentrate foaming, influences treatment effect.
Additionally, when passing through ion-exchange process Adsorption of Radioactive nucleic, the general pattern using fixed bed reactors, radiation
Property waste liquid by be loaded with ion exchange resin fixed bed reactors occur ion exchange.But because ion exchange resin does not have
Selectivity, in salt content waste liquid high, resin is soon because simultaneously conventional ion is failed by exchange saturation.It is with Daya Gulf
Example, TEU is two mixed beds of series connection except salt bed configuration, and 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 the waste liquid of evaporation process can only pass through
Fluid reservoir keep in, although by one temporarily remove salt bed purified treatment, but due to this temporarily except salt bed capacity it is smaller and long when
Between operation be easily caused radioactive dosage and raise rapidly, liquid waste processing is relatively difficult to put, it is necessary to set more storage tank to store
Penetrating property waste liquid.Further, since contain the more nucleic existed with colloidal attitude in nuclear power station radioactive liquid waste, such as110mAg、58Co、60Co etc., it is easy to which being attached on resin causes to make ion exchange resin saturation, evaporates and the treatment effect of ion exchange is all bad,
The cycle time of ion exchange resin, changes frequent, radioactive spent resin yield it is higher, it is necessary to stabilized and solidification at
Reason, radioactive solid waste amount is more, and treatment, disposal costs are sufficiently expensive, increased the totle drilling cost of Radioactive waste management, and this is
Current nuclear power station problem demanding prompt solution.
To sum up, traditional Spent Radioactive liquid processing method energy consumption is big, radioactive solid waste amount that is producing 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, radioactive solid waste amount that is producing is less
Reason method and treating apparatus for radioactive waste liquid.
A kind of Spent Radioactive liquid processing device, including：
First reactor, is provided with the first agitator in the first reactor, the first reactor is provided with first and enters
Liquid mouthful and the first liquid outlet, first inlet are used to flow into radioactive liquid waste in the first reactor, when using
Load the first adsorbent in the first reactor, first agitator be used to stirring and evenly mixing the radioactive liquid waste with it is described
First adsorbent；And
Second reactor, is provided with the second agitator in the second reactor, the second reactor is provided with second and enters
Liquid mouthful and the second liquid outlet, second inlet with first liquid outlet by pipeline communication, use by second inlet
The first supernatant formed after by first reactor treatment is flowed into the second reactor, described second when using
Load the second adsorbent in reactor, second agitator is used to stir and evenly mix first supernatant with the described second absorption
Agent, second liquid outlet is used for the second supernatant discharge second reaction that will be formed after second reactor treatment
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, comprises the following steps：
Above-mentioned Spent Radioactive liquid processing device or above-mentioned treating apparatus for radioactive waste liquid are provided；
During radioactive liquid waste flowed into the first reactor, by first agitator by the radioactive liquid waste with
First adsorbent is stirred and evenly mixed, and first adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The first supernatant and the first precipitation are obtained after standing sedimentation；
During first supernatant flowed into the second reactor, by second agitator 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 radioactive liquid waste is flowed into the operation in the first reactor before, also wrap
The operation for collecting radioactive liquid waste is included, the radioactive liquid waste that will be collected by way of in batches afterwards flows into described first
In reactor, after the operation that first supernatant is flowed into the second reactor, flowed in the first reactor
Enter the radioactive liquid waste of next batch.
In one embodiment, first adsorbent and the solid-to-liquid ratio of the radioactive liquid waste are 20g/L~60g/
L, second adsorbent is 20g/L~60g/L with the solid-to-liquid ratio of first supernatant.
In one embodiment, methods described is additionally included in using the Spent Radioactive liquid processing device or the radiation
Property waste liquor treatment equipment for a period of time after, change first adsorbent in the first reactor, and by described first
Reactor is exchanged with the liquid flow direction of the second reactor, and methods described comprises the following steps afterwards：
During the radioactive liquid waste flowed into the second reactor, by second agitator 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；
During 3rd supernatant flowed into the first reactor, by first agitator by the 3rd supernatant
First adsorbent after liquid and replacing is stirred and evenly mixed, and first adsorbent after replacing 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 agitator
In the attached dose of operation for stirring and evenly mixing, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min；Described standing is sunk
Obtained after drop in the operation of the first supernatant and the first precipitation, the standing sedimentation time is 2min~3min.
In one embodiment, it is described to be adsorbed first supernatant and described second by second agitator
In the operation that agent is stirred and evenly mixed, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min；The standing sedimentation
Obtain afterwards in the operation of the second supernatant and the second precipitation, 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 simple 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 supernatant for obtaining, and meets discharge standard.What even colloidal attitude was present
Nucleic, can also be processed by above-mentioned Spent Radioactive liquid processing device, and less energy consumption, the radioactive solid waste amount of generation is less.
The processing method of above-mentioned radioactive liquid waste, by the radiation including first reactor and second reactor two-stage cascade
Property liquid waste treating apparatus process radioactive liquid waste, radioactive liquid waste carries out in flowing into the first reactor equipped with the first adsorbent
Adsorption reaction, makes the mixing of radioactive liquid waste and the first adsorbent after the stirring of the first agitator, 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 carries out adsorption reaction in flowing into the second reactor equipped with the second adsorbent, and first is made after the stirring of the second agitator
Supernatant and the second adsorbent are mixed, 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 indicate that, reacted by first reactor and second
After device two-stage adsorption treatment, radionuclide amount is few in the second supernatant for obtaining, and meets discharge standard.Even colloidal attitude
The nucleic of presence, can also be adsorbed by the first adsorbent or the second adsorbent and be precipitated during standing sedimentation, therefore radiation
Property waste liquid can directly carry out two-stage adsorption treatment, can save the operation of evaporation process, and energy consumption is small.First adsorbent and the second suction
Attached dose can be repeated several times and 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 structural representation of the Spent Radioactive liquid processing device of an implementation method；
Fig. 2 is the schematic flow sheet when radioactive liquid waste is processed of Spent Radioactive liquid processing device as shown in Figure 1；
Fig. 3 is the structural representation of the treating apparatus for radioactive waste liquid of an implementation method；
Fig. 4 is the flow chart of the Spent Radioactive liquid processing method of an implementation method；
Fig. 5 be adsorbent in embodiment 1 dosage be respectively under the conditions of 20g/L, 40g/L, 60g/L to Cs+Go
Except rate versus time curve figure；
Fig. 6 is the size distribution situation map using the adsorbent in laser particle size analyzer measurement embodiment 2；
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
Overall decontamination factor is with the curve map for processing batch variation with second reactor；
Fig. 9 is the aqueous concentration of first reactor in embodiment 3 and the aqueous concentration of second reactor with treatment batch
The curve map of change；
Figure 10 is the Cs of single batch in first reactor in embodiment 3 and second reactor+The song of the change of adsorbance
Line chart；
The Cs added up in first reactor and second reactor in Figure 11 embodiments 3+The curve map of adsorbance change；
Figure 12 is the decontamination factor of first reactor, the decontamination factor of second reactor and the first reaction in embodiment 6
The overall decontamination factor of device and second reactor with the change for the treatment of 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 for the treatment of batch curve map.
Specific embodiment
To enable the above objects, features and advantages of the present invention more obvious understandable, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.Elaborate many details in order to fully understand this hair in the following description
It is bright.But the present invention can be implemented with being much different from other manner described here, and 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 by following public specific implementation.
Fig. 1, the Spent Radioactive liquid processing device 10 of an implementation method, including first reactor 100, second is referred to react
Device 200 and exhausted bath box 300.The first agitator 110 is provided with first reactor 100.Second is provided with second reactor 200 to stir
Mix device 210.First reactor 100 is connected with second reactor 200.
Specifically, first reactor 100 is provided 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 is provided with the second inlet 201 and second and goes out
Liquid mouthful 203, the first liquid outlet 103 and the second inlet 201 pass through pipeline communication.Further, be provided with the duct switch, with
And kinetic pump is controlling the flow rate of liquid.Load the first adsorbent, second reactor when using 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 is by the first inlet 101 and first reactor 100
Connection.It is used to collect radioactive liquid waste by exhausted bath box 300, radioactive liquid waste easily quantitatively can be in batches flowed into first anti-
Answer in device 100 and second reactor 200.Certainly, in other embodiments, exhausted bath box 300 can also be omitted, nuclear power station fortune
The radioactive liquid waste produced during row is processed in can flowing directly into first reactor 100.
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 be connected in series with second reactor 200 the 3rd
Reactor, the 4th reactor etc..
Specifically, the schematic flow sheet of the treatment radioactive liquid waste of first reactor 100 is as shown in Figure 2.Radioactive liquid waste stream
After entering to be pre-loaded with the first reactor 100 of the first adsorbent, by the first agitator 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 obtains the first supernatant and the first precipitation, the first supernatant after treatment in first reactor 100 after standing sedimentation
Liquid is flowed into second reactor 200 by the first liquid outlet 103.After using 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 also includes magnetic valve, Spent Radioactive liquid processing device 10 1 is being used
After the section time, first reactor 100 can also be flowed to the liquid of second reactor 200 by magnetic valve and exchanged, 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.
The above-mentioned simple structure of Spent Radioactive liquid processing device 10, 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 the two-stage adsorption treatment of device 200, radionuclide amount is few in the second supernatant for obtaining, and meets discharge standard.Even glue
The nucleic that figure is present, can also be processed, less energy consumption by above-mentioned Spent Radioactive liquid processing device 10, and the solid radiation of generation gives up
Thing amount is less.
Additionally, referring to Fig. 3, the present invention also provides the treating apparatus for radioactive waste liquid 20 of an implementation method, 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, can realize largely processing radioactive liquid waste, locate
Reason amount is big, realizes the continuity treatment of radioactive liquid waste.
The simple structure of above-mentioned treating apparatus for radioactive waste liquid 20, possesses effective, selectivity strong, miniaturization, modularization, removable
The characteristics of dynamic property is strong, it is low to the requirement of Site Service condition, it is very suitable for nuclear power plant's radioactive liquid waste composition complex and existing
The limited particular/special requirement of field arrangement space.The many links of such as 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.Processed for these distributed low radioactive waste liquids, there is three
Plant alternative plan：1) each spaced point sets up processing unit；2) waste liquid is transported to unified centrostigma from spaced point
Processed；3) it is respectively processed to each spaced point using single or multiple wheeled apparatus.In each spaced point one by one
The investment for building treatment facility is big, and equipment vacancy rate is high, in addition it is also necessary to puts into substantial amounts of fund and is safeguarded and retired, while also needing
It is equipped with and operator training, attendant and retiree, does not have economy.Low radioactive waste liquid is transported to system from spaced point
One focus on a little is processed, and freight volume is big, and freight is high, the environmental risk that liquid radioactive waste transport point brings
Greatly, it is not permitted in regulation, without operability.The treating apparatus for radioactive waste liquid 20 of present embodiment may move, according to
Need to move to each spaced point and be respectively processed, can both evade the risk in transit of liquid radioactive waste, can avoid again
Overlapping investment is built, and improves utilization rate of equipment and installations, and treating capacity is big, and energy consumption is small, and the radioactive solid waste amount of generation is less.
Fig. 4 is referred to, the Spent Radioactive liquid processing method of an implementation method comprises the following steps S110~S160.
S110, offer 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 for the treatment of apparatus for radioactive waste liquid is as schemed
Shown in 3.
S120, by radioactive liquid waste flow into first reactor in, by the first agitator 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 producing in nuclear power station running, the first reaction
The first adsorbent is pre-loaded with device.Radioactive liquid waste can be by pipeline inflow first reactor.
Specifically, the first adsorbent can be the particle that a class is 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, so as to radiation
Property waste liquid fully mix, absorption waste liquid in radionuclide.For a period of time, the first adsorbent can be settled 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 is high to the selectivity of main trace nucleic Cs, Sr, Co, Ag, I etc., can putting from high salt amount
Target species ion is efficiently removed in penetrating property waste liquid, the radioactive activity of waste liquid can be quickly greatly lowered, non-putting is coexisted
The influence of ion is smaller, therefore long service life, and quantity of solid waste is small.After being adsorbed through the first adsorbent, substantial amounts of radioactive nucleus
Element is enriched in the adsorbent of solid-state first of small size, it is easy to radiation protection.Compared to spent resin, what inorganic adsorbing material was produced
Radioactive waste heat endurance and chemical stability is good, radiation-resistant property strong, is difficult, by RADIATION DECOMPOSITION or biological decomposition, to be easy to
The treatment disposal in later stage, during underground disposal long term storage, 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, enter one
Step improves treatment effeciency.
It will be appreciated, of course, that in other embodiments, the first adsorbent can not also have by magnetic, by gravity
Also the first adsorbent can be settled.
After radioactive liquid waste is flowed into first reactor, radioactive liquid waste is stirred in first reactor, make radiation
Property waste liquid and the first adsorbent mix, the first adsorbent by radioactive liquid waste radionuclide adsorb.By stirring operation,
The first adsorbent can be accelerated and complete absorption 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 agitator
In the operation that agent is stirred and evenly mixed, stir speed (S.S.) is 250rpm~350rpm, and mixing time is 2min~3min.The results showed,
Stirring 2min~3min, the clearance of radionuclide can reach more than 99%, and treatment effeciency is significantly improved, and suitable treatment is dashed forward
A large amount of radioactive liquid wastes that hair event is produced.
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, realize separation of solid and liquid so as to obtain
Precipitated to the first supernatant and first.First supernatant can be further flowed into by pipeline and flow into equipped with the second adsorbent the
Processed 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 for the treatment of, until the first adsorbent reaches saturation, then mended in first reactor
Fill the first new adsorbent.
Specifically, during the first supernatant and the first operation for precipitating are obtained after standing sedimentation, the standing sedimentation time is 2min
~3min.The results showed, standing sedimentation 2min~3min is to be capable of achieving preferable separation of solid and liquid.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 treatment, the radioactive solid waste amount of generation is less.
In S140, the first supernatant stream second reactor that will be obtained in S130, by the second agitator 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 by pipeline inflow second reactor.
Specifically, the second adsorbent can be the particle that a class is 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 as to first
Supernatant is fully mixed, the radionuclide in the first supernatant of absorption.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 is high to the selectivity of main trace nucleic Cs, Sr, Co, Ag, I etc., can putting from high salt amount
Target species ion is efficiently removed in penetrating property waste liquid, the radioactive activity of waste liquid can be quickly greatly lowered, non-putting is coexisted
The influence of ion is smaller, therefore long service life, and quantity of solid waste is small.After being adsorbed through the second adsorbent, radionuclide enrichment
In the adsorbent of solid-state second of small size, it is easy to radiation protection.Magnetic core carrier Fe is coated on inorganic adsorbing material3O4, when stirring
Mix after the completion of absorption, can quickly be settled the second adsorbent 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 magnetic, by gravity
Also the second adsorbent can be settled.
Specifically, the first adsorbent is identical with the second sorbent material, by after the absorption of two-stage sequencing batch type, Spent Radioactive
Radionuclide in liquid is adsorbed by the first adsorbent with the second adsorbent substantially, so as to reach discharge standard.First absorption
Agent and the second adsorbent can be repeatedly used, 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 second reactor, make first
Supernatant and the second adsorbent are mixed, the radionuclide absorption that the second adsorbent will be remained in the first supernatant.By stirring
Operation, can accelerate the second adsorbent and the first supernatant completes absorption in a short time, shorten the reaction time.
Specifically, being stirred and evenly mixed the first supernatant with the second adsorbent by the second agitator, stir speed (S.S.) is
250rpm~350rpm, mixing time is 2min~3min.Second adsorbent repeats the first multiple batches of supernatant for the treatment of.
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, realize 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, the first multiple batches of supernatant for the treatment of is repeated, until
Second adsorbent reaches saturation, then to supplementing the second new adsorbent in second reactor.
Specifically, during the second supernatant and the second operation for precipitating are obtained after standing sedimentation, the standing sedimentation time is 2min
~3min.The results showed, standing sedimentation 2min~3min is to be capable of achieving preferable separation of solid and liquid.Remained 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 treatment, until the second adsorbent reaches saturation, then it is new to being supplemented in second reactor
Second adsorbent, the radioactive solid waste amount of generation is less.
S160, when the second supernatant meets discharge standard, by the second supernatant discharge second reactor.
Specifically, by after the adsorption treatment of first reactor and second reactor two-stage sequencing batch type, detecting on second
Whether the radionuclide in clear liquid meets discharge standard, when the second supernatant meets discharge standard, by the second supernatant row
Go out second reactor, the radioactive liquid waste treatment 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
The 4th reactor that 3rd reactor is connected with the 3rd reactor ... processed, until the supernatant of discharge reaches discharge
Standard.
In present embodiment, before radioactive liquid waste is flowed into the operation in the first reactor equipped with the first adsorbent,
Also include collecting the operation of radioactive liquid waste, the radioactive liquid waste that will be collected by way of in batches is flowed into equipped with the first absorption
In the first reactor of agent, after the operation that the first supernatant is flowed into the second reactor equipped with the second adsorbent, to the
The radioactive liquid waste of next batch is flowed into one reactor.Process in batches, realize the continuity treatment of radioactive liquid waste treatment.
Specifically, the amount of the radioactive liquid waste per batch processed as needed, can be distributed.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~
First adsorbent of 60g.The influx of the second adsorbent is 20g/L~60g/L.Effective volume in second reactor per 1L,
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, keep good adsorption capacity, the first adsorbent and second after the radioactive liquid waste that can process more than 70 batches
Adsorbent is reused, and effectively reduces the radioactive solid waste amount for producing.
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, change first reactor in the first adsorbent, by first reactor with second reaction
Liquid flow direction in device is exchanged, and the method comprises the following steps afterwards：During radioactive liquid waste flowed into second reactor, by the
Two agitators stir and evenly mix radioactive liquid waste with the second adsorbent, and the second adsorbent is by the radionuclide in radioactive liquid waste
Absorption, obtains the 3rd supernatant and the 3rd precipitation after standing sedimentation.By in the 3rd supernatant inflow first reactor.By first
First adsorbent of the agitator by the 3rd supernatant and after changing is stirred and evenly mixed, and the first adsorbent after replacing 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.
Because the radionuclide concentration level of the radioactive liquid waste processed in first reactor is higher, therefore the first reaction
There is failure state first in the first adsorbent in device, and now the second adsorbent in second reactor also has good suction
Attached activity.Now, only to first reactor can discharge the operation of adsorbent, and load the first new adsorbent, and the
The second adsorbent in two reactors is changed without.Then first reactor is exchanged with second reactor liquid flow direction, 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.Exchanged by the way that first reactor and second reactor liquid are flowed to, the second adsorbent in second reactor can be repeated
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 processing sequence switching of first reactor and second reactor relies on solenoid valve control.Present embodiment can fill
Divide using the adsorption capacity of adsorbent, on the premise of processing requirement is met, be reduced as far as radwaste yield.
Above-mentioned Spent Radioactive liquid processing method is by after first reactor and second reactor two-stage adsorption treatment, obtaining
The second supernatant in radionuclide amount it is few, meet discharge standard.Even the nucleic that colloidal attitude is present, also can be by first
Adsorbent or the second adsorbent are adsorbed, and so as to be 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 can be repeated several times and make
With treating capacity is big, and the radioactive solid waste amount of generation is less.
It is below specific embodiment part.
In following examples, the radionuclide in radioactive liquid waste is Cs+, the first adsorbent and the second adsorbent phase
Answer for Cs can be adsorbed+Adsorbent.Methods described is conventional method, the raw material and detection institute unless otherwise instructed
Can be obtained from open commercial sources unless otherwise instructed with standardizing chemical reagent.
In all of the embodiments illustrated, Cs before and after adsorbing+Concentration using plasma mass spectrum (ICP-MS) of ion is determined.
Performance of the adsorbent uses Cs+The clearance of ion is represented.Clearance RRt(%) as shown in following formula 1,
Wherein, RRtIt is Cs (I) clearance of t, C0It is raw water Cs+Concentration (mg/L), CtIt is t 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).Experiment adsorbent is 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 CsNO3Running water (the μ s/cm of electrical conductivity about 980,550~750mg/L of correspondence salinity) is dissolved in prepare, Cs+
Concentration is 1.5mg/L.Under the conditions of the 300rpm within the 13min of stirring reaction, 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)
Clearance.Clearance under the conditions of the dosage of different adsorbents is mapped to t, as shown in Figure 5.Result of the test is visible：Inhale
Attached dose of dosage is bigger, and the removal speed to Cs (I) is faster.Under the conditions of each dosage, most of Cs+Gone in 2min
Remove.Specifically in 2min, 3min and 5min to Cs+Clearance data such as table 1 below.
Table 1：Adsorbent is under different dosages to the clearance (%) of Cs (I)
Data above surface, in 2min, Cs when dosage is 20g/L+Clearance be 99.3%, 40g/L when clearance
Hereafter clearance is further added by the reaction time up to 99.9% when being 99.6%, 60g/L, and clearance no longer substantially increases.Thus may be used
See, stirring and adsorbing reaction time 2min or so, adsorbent can be by the radionuclide absorption 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 is adsorbed
Agent (Chinese invention patent ZL201210347269.8).Experiment determines the gravitational settling time with checking adsorbent.
Magnetic for being selected in the present embodiment removes caesium adsorbent, and 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 reactor wall completely, complete solid liquid phase quick separating.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.
Individual particle free settling process in media as well can be divided into boost phase and constant velocity stage.For little particle
Speech, boost phase is generally extremely short, can ignore.Then, it is at the uniform velocity process that whole infall process can be assumed that.
It is the final speed of infall process, i.e. constant velocity stage that Stokes settles the sinking speed described by formula (2)
Sinking speed u0Can be calculated by following formula and obtained：
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
Between 10 μm~30 μm, median is 23.35 μm to footpath substrate.
Measure adsorbent density about 4.0g/mL, the density of aqueous is 1.0g/mL, and viscosity is 0.001Pa
S, the then particle sinking speed for settling formula calculating according to Stokes is 3.56mm/s.It is being applicable for proof theory sinking speed
Property, from the graduated cylinder of 500mL, diameter about 5cm, about 25cm high carry out sedimentation experiment, and process of the test photo is referring to accompanying drawing 7.Design
In theory sinking speed 3.56mm/s can be used as reference, then the sedimentation time needed for theoretical sinking speed is calculated is 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 by externally-applied magnetic field, and 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 operating 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 running water (the μ s/cm of electrical conductivity about 980, correspondence 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 are
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.Taking the supernatant samples of part first carries out Cs+It is dense
In degree detection and the first supernatant second reactor of the inflow equipped with the second adsorbent.Stirred with 300rpm in second reactor
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, to flowing into next batch in first reactor
Radioactive liquid waste.So move in circles.The primary effluent sample (the first supernatant samples) of each batch is measured using ICP-MS
With the Cs in secondary effluent sample (the second supernatant samples)+Concentration, and calculate decontamination factor DF according to (3) formula：
Wherein, CinIt is the water inlet Cs into corresponding reactor+Concentration (mg/L), CoutIt is corresponding reactor
Water outlet Cs+Concentration (mg/L), DF is decontamination factor.
After tested, the decontamination factor of first reactor, the decontamination factor of second reactor and first reactor and second
, with the situation of change for the treatment of batch as shown in figure 8, abscissa is treatment batch, ordinate is to go for the overall decontamination factor of reactor
The logarithm of the dirty factor, 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 for the treatment of 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 the batch of the radioactive liquid waste disposal methods 70 (70L) for passing through the present embodiment
After radioactive liquid waste, first reactor and the overall decontamination factor of second reactor are still higher, with good dirt-removing power.
In the starting stage, the decontamination factor of first reactor is more than 1000.As treatment batch increases, the primary effluent of first reactor
Concentration gradually increases, and first order decontamination factor is gradually reduced.Due to the increase of primary effluent concentration, the effect that second reactor is played
More and more substantially, the decontamination factor of second reactor increases with the increase for the treatment of 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 processed.
In nuclear industry, the discarded adsorbent for being enriched radionuclide need to be by treatment and long term storage, therefore radiation
The volume of property waste should small quantization.After tested in the present embodiment, under conditions of decontamination factor is met more than 1000, treatment
What the radioactive wastewater of 70L was produced discards adsorbent only 40g (about 10mL), treating capacity and waste yield volume ratio containing Cs (I)
It is 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, first using the method treatment radioactive liquid waste of 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, by vacuum filtration fill
Put the discharge of the first adsorbent, the first new adsorbent is loaded in first reactor, and in second reactor second adsorbs
Agent is changed without.Then first reactor is exchanged with the liquid flow direction in second reactor, the first of the first adsorbent will be updated
Reactor in ensuing processing procedure as the second level, and using second reactor (the second stage reactor before) as
One-level is used, and to improve adsorbent utilization rate, it is ensured that 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
Result is tested, treating apparatus for radioactive waste liquid as shown in Figure 3 is devised.The treating apparatus for radioactive waste liquid includes two parallel connections
Liquid waste treating apparatus.The mode for taking two-way in parallel is run, and 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 the overall removal of soils factor 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
It is water inlet, absorption, precipitation, water outlet.Cs in waste liquid+Concentration is 1.5mg/L, and water inlet, absorption, precipitation, water outlet stage are each
2.5min.One batch processed needs 10min, and 6 batches can be processed per hour.
Adsorbent adds solid-to-liquid ratio for 40g/L, i.e. each reactor adsorbent add quality about 3400g.The two-way is in parallel
The operational mode of two-stage reactor is：Water inlet, absorption, precipitation, each 2.5min of water outlet stage in operation.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 is absorption phase, and 1-B is precipitate phase；Ensuing 2.5min, 1-A are
Precipitate phase, 1-B is 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 is not reached
It is required that untill.
Method of testing 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 is produced 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, treatment
Efficiency high, radwaste yield is small.
Embodiment 6
The present embodiment tests the effect of enhanced processing amount on radioactive liquid waste disposal methods plant produced line of the invention
Really.First adsorbent and the second adsorbent are magnetic core cladded type ferrocyanide except caesium adsorbent is (by 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 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, is 20L per batch processed water.Devised in reactor certainly
Dynamic control, is switched over to one or two grades, and water inlet and draining are automatically stopped by Liquid level after the batch number set by completion
Operation.Two groups of dispositions of different adsorbent dosages are tested respectively.Adsorbent dosage in each reactor in first group
It is 40g/L, control stirring and adsorbing reaction time and standing sedimentation time are 3min.Adsorbent in each reactor in second group
Dosage is 60g/L, and control stirring and adsorbing reaction time and standing sedimentation time are 3min.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 overall decontamination factor of device as shown in figure 12 with the situation of change for the treatment of batch.It can be recognized from fig. 12 that with treatment 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 overall removal of soils factor of second reactor is slowly reduced, and decontamination factor is reduced to after about 30 batch raw waters are processed
1000, it is reduced to 100 after about 70 batch raw waters for the treatment of.If it is required that decontamination factor be more than 1000, then by treatment 30
Batch is calculated, the enrichment Cs that treatment 600L raw waters are produced+Discarded adsorbent be 800g, the volume for the treatment of capacity and waste yield
Than being 3000.Under conditions of decontamination factor is met 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.
Such as the decontamination factor that Figure 13 is first reactor and second reactor totality in first group of experiment and second group of experiment
With the situation of change for the treatment of batch.Be can be seen that when adsorbent dosage brings up to 60g/L from 40g/L from Figure 13 results,
Reaction incipient stage Cs+Decontamination factor be obviously improved, under conditions of meeting decontamination factor 1000, can treatment batch be carried from 30
It is high to 70 batches.Experiment is visible, and adsorbent dosage improves 50%, and processed batch of the decontamination factor more than 1000 is improved
One times.From experiment, adsorbent dosage is brought up into 60g/L from 40g/L, stirring, sedimentation etc. are had no significant effect.
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 decontamination factor for 70 batches can be processed under conditions of 1000, that is, 1400 liters of waste water are processed, produce solid waste 1200
Gram, wastewater treatment capacity and waste yield volume ratio are 4600, illustrates that the method for the present invention is answered the industrial production for expanding is actual
In, treatment effeciency is still higher, and radwaste yield is small.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one 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 guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of Spent Radioactive liquid processing device, it is characterised in that including：
First reactor, is provided with the first agitator in the first reactor, the first reactor is provided with the first inlet
With the first liquid outlet, first inlet is used to flow into radioactive liquid waste in the first reactor, described when using
Load the first adsorbent in first reactor, first agitator is used to stir and evenly mix the radioactive liquid waste with described first
Adsorbent；And
Second reactor, is provided with the second agitator in the second reactor, the second reactor is provided with the second inlet
With the second liquid outlet, with first liquid outlet by pipeline communication, second inlet is used for will for second inlet
The first supernatant formed after the first reactor treatment is flowed into the second reactor, in the described second reaction when using
Load the second adsorbent in device, second agitator is used to stir and evenly mix first supernatant and second adsorbent,
Second liquid outlet is used to for the second supernatant formed after second reactor treatment to discharge the second reactor.
2. a kind for the treatment of apparatus for radioactive waste liquid, it is characterised in that including at least two Spent Radioactives as claimed in claim 1
Liquid processing device, is in be connected in parallel between the Spent Radioactive liquid processing device.
3. a kind of Spent Radioactive liquid processing method, it is characterised in that comprise the following steps：
Spent Radioactive liquid processing device as claimed in claim 1 or radioactive liquid waste as claimed in claim 2 treatment are provided
Equipment；
During radioactive liquid waste flowed into the first reactor, by first agitator by the radioactive liquid waste with it is described
First adsorbent is stirred and evenly mixed, and first adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The first supernatant and the first precipitation are obtained after standing sedimentation；
During first supernatant flowed into the second reactor, by second agitator will first supernatant and
Second adsorbent is stirred and evenly mixed, 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.
4. Spent Radioactive liquid processing method according to claim 3, it is characterised in that described that radioactive liquid waste is flowed into institute
Before stating the operation in first reactor, also including the operation of collection radioactive liquid waste, will be received by way of in batches afterwards
The radioactive liquid waste of collection is flowed into the first reactor, in first supernatant flows into the second reactor
After operation, to the radioactive liquid waste that next batch is flowed into the first reactor.
5. Spent Radioactive liquid processing method according to claim 3, 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 second adsorbent is 20g/L with the solid-to-liquid ratio of first supernatant
~60g/L.
6. Spent Radioactive liquid processing method according to claim 3, it is characterised in that methods described is additionally included in and uses institute
After stating Spent Radioactive liquid processing device or the treating apparatus for radioactive waste liquid for a period of time, in the replacing first reactor
First adsorbent, and the liquid flow direction of the first reactor and the second reactor is exchanged, afterwards the side
Method comprises the following steps：
During the radioactive liquid waste flowed into the second reactor, by second agitator by the radioactive liquid waste with
Second adsorbent is stirred and evenly mixed, and second adsorbent adsorbs the radionuclide in the radioactive liquid waste；
The 3rd supernatant and the 3rd precipitation are obtained after standing sedimentation；
During 3rd supernatant flowed into the first reactor, by first agitator by the 3rd supernatant with
And first adsorbent after changing is stirred and evenly mixed, first adsorbent after replacing is by putting in the 3rd supernatant
Penetrating property nucleic is adsorbed；
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.
7. Spent Radioactive liquid processing method according to claim 3, it is characterised in that described by first agitator
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；Obtained after the standing sedimentation the first supernatant and first precipitation operation in, standing sedimentation
Time is 2min~3min.
8. Spent Radioactive liquid processing method according to claim 3, it is characterised in that described by second agitator
In the operation that first supernatant is stirred and evenly mixed with second adsorbent, stir speed (S.S.) is 250rpm~350rpm, is stirred
The time is mixed for 2min~3min；Obtained after the standing sedimentation the second supernatant and second precipitation operation in, during standing sedimentation
Between be 2min~3min.
9. 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 Fe being coated on the inorganic adsorbing material3O4。
10. Spent Radioactive liquid processing method according to claim 1, it is characterised in that the particle diameter of first adsorbent
It it is 10 μm~30 μm, the particle diameter of second adsorbent is 10 μm~30 μm.
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| CN109754888A (en) * | 2019-01-16 | 2019-05-14 | 中国辐射防护研究院 | A method of radioactivity waste oil is handled using spent sorbents in nuclear power station |
| WO2019203725A1 (en) * | 2018-04-17 | 2019-10-24 | E.L.I (Environment Laboratory Impact) Services Pte. Ltd. | Process and system for removing radioactive ions present in a liquid |
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