CN104751927A - Method and system for performing electrodialysis treatment on radioactive waste incineration process waste water - Google Patents
Method and system for performing electrodialysis treatment on radioactive waste incineration process waste water Download PDFInfo
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- CN104751927A CN104751927A CN201310731945.6A CN201310731945A CN104751927A CN 104751927 A CN104751927 A CN 104751927A CN 201310731945 A CN201310731945 A CN 201310731945A CN 104751927 A CN104751927 A CN 104751927A
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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
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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
- G21F9/20—Disposal of liquid waste
- G21F9/22—Disposal of liquid waste by storage in a tank or other container
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Abstract
The invention relates to a radioactive waste treatment technology, in particular to a method and a system for performing electrodialysis treatment on radioactive waste incineration process waste water. The method for performing the electrodialysis treatment on the radioactive waste incineration process waste water includes: respectively placing the process waste water in a primary water concentration tank and a primary water desalination tank according to a volume ratio of 1:1, generating a primary desalinated solution and a primary concentrated solution after performing primary circulation desalination on the process waste water, respectively feeding the primary desalinated solution to a secondary water concentration tank and a secondary water desalination tank according to a concentration and desalination solution volume ratio of 3.5:4.5, performing secondary circulation desalination on the primary desalinated solution in the secondary water concentration tank and the secondary water desalination tank so as to generate a secondary desalinated solution, using a part of the secondary desalinated solution to prepare incineration system new absorption liquid, and discharging the rest of the secondary desalinated solution; performing direct current concentration on the primary concentrated solution separately fed to a concentration chamber and a desalination chamber in a concentration tank according to a volume ration of 5:7 so as to obtain a direct current concentrated solution, spraying the direct current concentrated solution into high temperature flue gas so as to achieve spray drying, and using a bag filter to collect salt particles obtained after the spray drying. The method for performing the electrodialysis treatment on the radioactive waste incineration process waste water is simple in process, and the system for performing the electrodialysis treatment on the radioactive waste incineration process waste water is compact, simple and convenient to operate and run, and low in energy consumption.
Description
Technical field
The present invention relates to a kind of Radwastes treatment technology, be specifically related to a kind of method and system of electrodialysis process radioactive waste burning process waste water.
Background technology
The high-temperature flue gas produced after flammable radioactive waste burns contains the non-pollutants of putting such as dust, heavy metal, sour gas, needs its cooling and purification before discharge.CIU is to HCl, SO contained by flue gas
x, NO
xdeng sour gas, utilize Na
2cO
3solution carry out neutralization absorb, pH value lower than 8 time cannot meet purification efficiency, become technique waste water.Containing Cl in technique waste water
-, SO
4 2-, SO
3 2-, NO
3 -, NO
2 -, CO
3 2-, HCO
3 -deng negative ion, wherein Cl
-account for more than 90%; Kation mainly contains Na
+, Ca
2+, Mg
2+deng, wherein Na
+account for more than 99%; Contain in addition
90sr,
137cs, U, Pu,
60the radioactive nuclides such as Co, activity concentration is at about 4000Bq/L, and salinity total concentration is about 40000mg/L, belongs to high salinity low level waste water.
Past utilizes the traditional handicrafts such as evaporation, ion-exchange to carry out treatment process waste water always, but there are some problems in practical application, mainly contains: the Cl contained by technique waste water
-serious to the equipment corrosion in low level waste water treatment facility, HCO contained in technique waste water
3-the ion exchange column used to low level waste water treatment facility produces analytic function, badly influences overall water treatment effect.For eliminating the impact that these problems are brought, need to develop new wastewater processing technology targetedly.
Summary of the invention
The object of the invention is to the defect for prior art, a kind of method and system of electrodialysis process radioactive waste burning process waste water are provided, realize the zero-emission of technique waste water.
Technical scheme of the present invention is as follows: a kind of method of electrodialysis process radioactive waste burning process waste water, comprises the steps:
(1) technique waste water is sent to wastewater storage tank after filtering, then 1:1 sends into one-level fresh-water tank and the dense tank of one-level respectively by volume;
(2) waste water in one-level fresh-water tank and the dense tank of one-level is realized primary cycle desalting processing by the first electric dialyzator, the one-level desalination solution after process sends into one-level fresh-water tank, and primary concentration liquid sends into the dense tank of one-level; Step (3) is entered to the process of one-level desalination solution, step (6) is entered to the process of primary concentration liquid;
(3) waste water in one-level fresh-water tank sends into the dense tank of secondary and secondary fresh-water tank respectively according to volume ratio 3.5:4.5;
(4) waste water in dense for secondary tank and secondary fresh-water tank is realized secondary cycle desalting processing by the second electric dialyzator, the secondary desalination solution after process sends into secondary fresh-water tank, and secondary concentration liquid sends into the dense tank of secondary;
(5) waste water in secondary fresh-water tank reaches processing requirements recoverable or discharge; Send the waste water in dense for secondary tank back to wastewater storage tank;
(6) waste water in dense for one-level tank is sent into direct current wastewater trough, under the 3rd electric dialyzator effect, realize direct current desalting processing according to deep or light room volume ratio 5:7 respectively, the desalination solution after process sends wastewater storage tank back to, and concentrate storage tank sent into by concentrate;
(7) utilize high-temperature flue gas to realize spraying dry by the waste water feeding quench tower in concentrate storage tank, the solid salinity particle of generation is collected by bag hose.
Further, the method for electrodialysis process radioactive waste burning process waste water as above, in step (2), the flow of primary cycle desalting processing is 28-32L/h, voltage across poles 38-42V, circulation desalination time 110-130min.
Further, the method for electrodialysis process radioactive waste burning process waste water as above, in step (4), the flow of secondary cycle desalting processing is 28-32L/h, voltage across poles 38-42V, circulation desalination time 35-45min.
Further, the method for electrodialysis process radioactive waste burning process waste water as above, in step (6), the flow of direct current desalting processing is 28-32L/h, voltage across poles 48-52V.
A kind of system of electrodialysis process radioactive waste burning process waste water, comprise the filtrator for filtering technique waste water, filtrator is connected with wastewater storage tank, wastewater storage tank connects one-level fresh-water tank and the dense tank of one-level respectively, and described one-level fresh-water tank is connected with the first electric dialyzator with the second pump respectively by the first pump with the dense tank of one-level; Described one-level fresh-water tank is also connected with secondary fresh-water tank and the dense tank of secondary respectively, described secondary fresh-water tank is connected with the second electric dialyzator with the 8th pump respectively by the 7th pump with the dense tank of secondary, and the dense tank of secondary is connected with described wastewater storage tank by the 3rd pump; The dense tank of described one-level is connected with direct current wastewater trough, and direct current wastewater trough is connected with the 3rd electric dialyzator with the 6th pump by the 5th pump, and the freshwater room of the 3rd electric dialyzator connects wastewater storage tank by the 4th pump, and the dense hydroecium of the 3rd electric dialyzator connects concentrate storage tank; Described concentrate storage tank is connected with quench tower.
Further, the system of electrodialysis process radioactive waste burning process waste water as above, wherein, the first described electric dialyzator adopts two-stage two-part assembling mode, two-way film group is in parallel, be divided into again twice series connection in the film group of every road, first time desalination after fresh water as stoste again through a desalination.
Further, the system of electrodialysis process radioactive waste burning process waste water as above, wherein, the pump adopted in system is corrosion protection pump.
Beneficial effect of the present invention is as follows: the present invention utilizes electrodialytic technique brine waste can be realized the desalination of the degree of depth and concentrate, concentrate returns CIU and realizes spraying dry, desalination solution meets " water environment quality standard " (GB3838-2002), a part is for preparing new absorbing liquid, all the other discharges, thus avoid the impact that technique waste water causes waste water disposal facility, achieve the zero-emission of technique waste water.Technique waste water treatment process of the present invention is simple, system compact, and operation operation is easy, energy consumption is low.Major equipment material is nonmetallic materials, at anti-Cl
-corrosion aspect has superiority.
Accompanying drawing explanation
Fig. 1 is method flow schematic diagram of the present invention;
Fig. 2 is system of the present invention composition schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and implementation process, the present invention is described in detail.
As shown in Figure 1, the method basic procedure of electrodialysis process radioactive waste burning process waste water provided by the present invention is as follows: technique waste water by volume 1:1 is placed in the dense tank of one-level and one-level fresh-water tank respectively, flow be 28-32L/h, carry out primary cycle desalination 110-130min under voltage across poles 38-42V after, produce one-level desalination solution and primary concentration liquid.One-level desalination solution carries out secondary cycle desalination according to deep or lightization liquid volume ratio 3.5:4.5 under flow 28-32L/h, voltage across poles 38-42V in the dense tank of secondary and secondary fresh-water tank, the secondary desalination solution concentration produced after 35-45min can meet GB3838-2002 " water environment quality standard " requirement, a part is for preparing the new absorbing liquid of CIU, and all the other discharge.The primary concentration liquid that primary cycle desalination produces carries out direct current by deep or lightization liquid volume ratio 5:7 and concentrates in thickener under flow 28-32L/h, voltage across poles 48-52V, the chilled water needed for direct current concentrate replacement CIU flue gas quenching process obtained sprays in high-temperature flue gas and realizes spraying dry, and the bag hose that dried salinity particle utilizes CIU itself to have is collected.
The major parameter of electrodialysis waste water treatment process is as table 1.
Table 1 electrodialysis process radioactive waste burning process waste water main operating parameters
The system of electrodialysis process radioactive waste burning process waste water provided by the present invention is primarily of electrodialysis Waste Water Treatment, instrument and control system, flue gas quenching tower, flue gas bag hose composition.
The effect of electrodialysis Waste Water Treatment realizes the concentrated of technique waste water and desalination, and electrodialysis Waste Water Treatment equipment is as table 2, and system composition as shown in Figure 2.
Table 2 electrodialysis Waste Water Treatment major equipment
| Sequence number | Device name | Model | Specifeca tion speeification | Physical dimension (㎜) | Quantity |
| 1 | Accurate filter | BG-1 | Water production rate: 0.5m 3/h | Ф90×500 | 1 |
| 2 | Electric dialyzator | DS208 | Water production rate: 10-50L/h | 200×520×450 | 3 |
| 3 | Corrosion protection pump | 4 | Flow: 0.1m 3/ h, lift: 15 meters | 8 | |
| 4 | Tank | 60L | Material: PVC | 5 | |
| 5 | Wastewater storage tank | 1 | 2m 3 | 1 | |
| 6 | Concentrate storage tank | 1 | 2m 3 | 1 | |
| 7 | Tensimeter | 8 | |||
| 8 | Pipeline, tubing | Material: ABS or PVC |
Electric dialyzator is the nucleus equipment of whole electrodialysis system, is made up of pole plate, cation-exchange membrane, anion-exchange membrane, dividing plate.
A, amberplex: adopt " hypotonic permeable membrane " that Cangzhou Zhong Bang water technology company limited produces.Anode membrane has strong acidic activity cation exchange groups R-SO
3-with can dissociating ions H
+, positively charged ion easily absorbs and passes through; Cavity block has very alkaline active cation exchange groups R
-cH
2n
+(CH
3)
3with can dissociating ions Cl
-, electronegative ion easily absorbs and passes through, to Cl
-there is stronger differential permeability.This film is by chemical separating and field of Environment Protection widespread use.
B, electrode: technique waste water contains a large amount of Cl
-and SO
4 2-, corrosivity is comparatively strong, adopts titanium to be coated with ruthenium as electrode material.
C, assembling form design: technique waste water salt content is high, the electrodialytic salt rejection rate of one-level is lower, and adopt two-stage two-part assembling mode, namely two-way film group is in parallel, be divided into again twice series connection in the film group of every road, first time desalination after fresh water as stoste again through a desalination.
D, module type selecting: the physical dimension of dividing plate is 150 × 400 × 0.8mm, be mesh grid formula dividing plate, effective channel size is 100 × 250 × 0.6mm, and flow process is 250mm.Pole plate is selected as fish scale type pole plate, every section of 30 pairs of films.
As shown in Figure 2, the operational process of electrodialysis Waste Water Treatment comprises the steps:
(1) technique waste water is sent to wastewater storage tank after filtering, then 1:1 sends into one-level fresh-water tank and the dense tank of one-level respectively by volume;
(2) waste water in one-level fresh-water tank and the dense tank of one-level is realized primary cycle desalting processing by 1# electric dialyzator under the effect of 1# pump and 2# pump, flow is 28-32L/h, voltage across poles 38-42V, circulation desalination time 110-130min, one-level desalination solution after process sends into one-level fresh-water tank, and primary concentration liquid sends into the dense tank of one-level; Step (3) is entered to the process of one-level desalination solution, step (6) is entered to the process of primary concentration liquid;
(3) waste water in one-level fresh-water tank sends into the dense tank of secondary and secondary fresh-water tank respectively according to volume ratio 3.5:4.5;
(4) waste water in secondary fresh-water tank and the dense tank of secondary is realized secondary cycle desalting processing by 2# electric dialyzator under the effect of 7# pump and 8# pump, flow is 28-32L/h, voltage across poles 38-42V, circulation desalination time 35-45min, secondary desalination solution after process sends into secondary fresh-water tank, and secondary concentration liquid sends into the dense tank of secondary;
(5) waste water in secondary fresh-water tank reaches processing requirements recoverable or discharge; By the water reuse 3# pumped back wastewater storage tank in dense for secondary tank;
(6) waste water in dense for one-level tank is sent into direct current wastewater trough, under the effect of 3# electric dialyzator, direct current desalting processing is realized according to deep or light room volume ratio 5:7 respectively by 5# pump and 6# pump, flow is 28-32L/h, voltage across poles 48-32V, desalination solution after process utilizes 4# pumped back wastewater storage tank, and concentrate storage tank sent into by concentrate; In direct current desalination processes, waste liquid is directly by electric dialyzator, to time not requirement;
(7) utilize high-temperature flue gas to realize spraying dry by the waste water feeding quench tower in concentrate storage tank, the solid salinity particle of generation is collected by bag hose.
Instrument and control system Main Function is the control realizing electrodialysis Waste Water Treatment electric dialyzator and pump, and gathers operational factor and show.
Quench tower and bag hose belong to the existing device of radioactive waste CIU own, and its operational factor maintains original system parameter constant, not by native system influence on system operation.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technology thereof, then the present invention is also intended to comprise these change and modification.
Claims (7)
1. a method for electrodialysis process radioactive waste burning process waste water, comprises the steps:
(1) technique waste water is sent to wastewater storage tank after filtering, then 1:1 sends into one-level fresh-water tank and the dense tank of one-level respectively by volume;
(2) waste water in one-level fresh-water tank and the dense tank of one-level is realized primary cycle desalting processing by the first electric dialyzator, the one-level desalination solution after process sends into one-level fresh-water tank, and primary concentration liquid sends into the dense tank of one-level; Step (3) is entered to the process of one-level desalination solution, step (6) is entered to the process of primary concentration liquid;
(3) waste water in one-level fresh-water tank sends into the dense tank of secondary and secondary fresh-water tank respectively according to volume ratio 3.5:4.5;
(4) waste water in dense for secondary tank and secondary fresh-water tank is realized secondary cycle desalting processing by the second electric dialyzator, the secondary desalination solution after process sends into secondary fresh-water tank, and secondary concentration liquid sends into the dense tank of secondary;
(5) waste water in secondary fresh-water tank reaches processing requirements recoverable or discharge; Send the waste water in dense for secondary tank back to wastewater storage tank;
(6) waste water in dense for one-level tank is sent into direct current wastewater trough, under the 3rd electric dialyzator effect, realize direct current desalting processing according to deep or light room volume ratio 5:7 respectively, the desalination solution after process sends wastewater storage tank back to, and concentrate storage tank sent into by concentrate;
(7) utilize high-temperature flue gas to realize spraying dry by the waste water feeding quench tower in concentrate storage tank, the solid salinity particle of generation is collected by bag hose.
2. the method for electrodialysis process radioactive waste burning process waste water as claimed in claim 1, is characterized in that: in step (2), the flow of primary cycle desalting processing is 28-32L/h, voltage across poles 38-42V, circulation desalination time 110-130min.
3. the method for electrodialysis process radioactive waste burning process waste water as claimed in claim 1, is characterized in that: in step (4), the flow of secondary cycle desalting processing is 28-32L/h, voltage across poles 38-42V, circulation desalination time 35-45min.
4. the method for electrodialysis process radioactive waste burning process waste water as claimed in claim 1, is characterized in that: in step (6), the flow of direct current desalting processing is 28-32L/h, voltage across poles 48-52V.
5. the system of an electrodialysis process radioactive waste burning process waste water, it is characterized in that: comprise the filtrator for filtering technique waste water, filtrator is connected with wastewater storage tank, wastewater storage tank connects one-level fresh-water tank and the dense tank of one-level respectively, and described one-level fresh-water tank is connected with the first electric dialyzator with the second pump respectively by the first pump with the dense tank of one-level; Described one-level fresh-water tank is also connected with secondary fresh-water tank and the dense tank of secondary respectively, described secondary fresh-water tank is connected with the second electric dialyzator with the 8th pump respectively by the 7th pump with the dense tank of secondary, and the dense tank of secondary is connected with described wastewater storage tank by the 3rd pump; The dense tank of described one-level is connected with direct current wastewater trough, and direct current wastewater trough is connected with the 3rd electric dialyzator with the 6th pump by the 5th pump, and the freshwater room of the 3rd electric dialyzator connects wastewater storage tank by the 4th pump, and the dense hydroecium of the 3rd electric dialyzator connects concentrate storage tank; Described concentrate storage tank is connected with quench tower.
6. the system of electrodialysis process radioactive waste burning process waste water as claimed in claim 5, it is characterized in that: the first described electric dialyzator adopts two-stage two-part assembling mode, two-way film group is in parallel, be divided into again twice series connection in the film group of every road, first time desalination after fresh water as stoste again through a desalination.
7. the system of electrodialysis process radioactive waste burning process waste water as claimed in claim 5, is characterized in that: the pump adopted in system is corrosion protection pump.
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481163A (en) * | 2015-12-02 | 2016-04-13 | 于加全 | Water treatment device and water treatment system |
| CN107311375A (en) * | 2017-06-02 | 2017-11-03 | 四川兴澳环境技术服务有限公司 | Low concentration Produced Water In Oil-gas Fields, Ngi Zero discharge treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105481163A (en) * | 2015-12-02 | 2016-04-13 | 于加全 | Water treatment device and water treatment system |
| CN107311375A (en) * | 2017-06-02 | 2017-11-03 | 四川兴澳环境技术服务有限公司 | Low concentration Produced Water In Oil-gas Fields, Ngi Zero discharge treatment method |
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|---|---|
| CN104751927B (en) | 2017-12-01 |
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