CN104789782A - BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process - Google Patents
BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process Download PDFInfo
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- CN104789782A CN104789782A CN201510167261.7A CN201510167261A CN104789782A CN 104789782 A CN104789782 A CN 104789782A CN 201510167261 A CN201510167261 A CN 201510167261A CN 104789782 A CN104789782 A CN 104789782A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a nuclear fuel reprocessing method in order to solve the problems that more devices are adopted, actual operation is complex, excessive nitric oxide is consumed, the economy is low and the like when a U/Pu separation section of the Purex process adopts nitric oxide for price adjustment, and provides a BP price-adjusting, degassing and acid-adjusting integrated device and method in a Purex process. The device comprises a filler column and a feed liquid receiving tank, wherein a BP feed liquid inlet and an NO2 feed port are formed in the filler column, a tail gas outlet is formed in the top, and a feed pipe extending to the feed liquid receiving tank is arranged on the feed liquid receiving tank. The method comprises steps of Pu price adjustment, nitrous acid removal and acid adjustment. According to the BP price-adjusting, degassing and acid-adjusting integrated device in the Purex process, nitric oxide price adjustment equipment is successfully simplified, the overall design of the adopted technological process is remarkably optimized, the nitric oxide consumption and the tail gas treatment quantity are remarkably reduced, the economy is remarkably improved, and a large quantity of costs is saved.
Description
Technical field
The present invention relates to a kind of nuclear fuel reprocessing method, particularly a kind of Purex flow BP price modification, degassed, acid adjustment integrated apparatus and method.
Background technology
In nuclear industry field, Purex flow is as the nuclear fuel reprocessing process quilt widespread use of classics.In Purex flow, the Pu product in each stage adopts BP (comprising 1BP and 2BP) to represent.
At the uranium plutonium segregation section of Purex flow, need to use reductive agent that Pu in organic phase (IV) is reduced to Pu (III), make Pu enter aqueous phase, and uranium is still present in organic phase with U (VI) state, thus realize the separation of uranium plutonium.Containing Pu (III) and remaining reductive agent in the Pu thick product 1BP feed liquid that uranium plutonium segregation section obtains, in Pu purification cycle, need reductive agent oxidation remaining in 1BP feed liquid, and Pu (III) is oxidizing to Pu (IV), then the acidity be adjusted to needed for 2AF carries out extraction back extraction, Pu is further purified concentrated.
In addition, containing Pu (III) and remaining reductive agent in the Pu product 2BP feed liquid obtained in Pu purification cycle, same needs is oxidized reductive agent wherein and Pu (III), carries out plutonium oxalate precipitation after acid adjustment.
Traditional price modification method makes oxygenant with Sodium Nitrite, although this method price modification effect is better, the Sodium Nitrite additionally added is to introducing a large amount of sodium ion in flow process.It is estimated, for above-mentioned reasons, often produce 1 ton of Pu by the α refuse of generation 7 tons of SODIUMNITRATE, significantly increase the burden of waste treatment.For overcoming the above-mentioned shortcoming adopting Sodium Nitrite price modification, the reprocessing plant of many countries adopts oxynitride to replace Sodium Nitrite to carry out the price modification of Pu, as the Ma Kuer factory of France, UP3 factory, UP2-800 factory, six institute's reprocessing plants of Japan, the THORP factory of Britain and europeanized factory.
Apply comparatively widely although oxynitride price modification obtains, but still come with some shortcomings at present, mainly comprise following two aspects: the feed liquid one, after nitrogen oxides, also need to contact to remove wherein excessive oxynitride with air inversion in filled column or sieve-plate column, and then feed liquid introduced in feed liquid receiving tank carry out acidity adjustment, in whole process, equipment is more, and actual motion is comparatively complicated; Two, in price modification process, because oxynitride is not by HNO
3solution fully dissolves and causes its luxus consumption, and produce a large amount of oxynitride tail gas need process, significantly reduce the economy of this technique.
Summary of the invention
Adopt the equipment existing for oxynitride price modification more for solving Purex flow uranium plutonium segregation section, actual motion is complicated, oxynitride luxus consumption, the problems such as economy is not good enough, the invention provides that a kind of Purex flow BP readjusts prices, degassed, acid adjustment integrated apparatus and method.
Described Purex flow BP price modification, degassed, acid adjustment integrated apparatus comprise filled column and feed liquid receiving tank, are connected bottom described filled column with feed liquid receiving tank top; Filled column inside is filled with price modification filler;
Filled column is provided with BP feed liquid opening for feed and NO
2opening for feed, described BP feed liquid gating location is higher than NO
2opening for feed; Filled column top is provided with offgas outlet;
Feed liquid receiving tank is provided with the feed pipe in the portion of inserting into the inner.
Described NO
2the distance of opening for feed and filled column bottom is preferably 0.3 ~ 0.5m.
Adopt that above-mentioned Purex flow BP readjusts prices, degassed, the price modification of acid adjustment integrated apparatus, degassed a, acid-adjusting method, the method comprises the following steps:
(1) respectively by BP feed liquid opening for feed, NO
2opening for feed, feed pipe pass into BP feed liquid, NO continuously
2, air, make NO
2with reductive agent counter current contact generation redox reaction, the O in the air that the NO that reaction generates is passed into rapidly
2be oxidized to NO
2, continue and reductive agent generation redox reaction, thus realize the price modification of Pu, excessive oxynitride is delivered to exhaust treatment system by offgas outlet;
(2), after completing the price modification of Pu, stop passing into NO
2, continue through feed pipe and in feed liquid, pass into air to remove nitrous acid excessive in feed liquid, make it to be converted into oxynitride and be delivered to exhaust treatment system by offgas outlet;
(3) in feed liquid, add nitric acid by feed pipe, then pass into air to feed pipe and mixing is made it to feed liquid bubbling, complete the acidity adjustment of feed liquid.
Purex flow BP price modification of the present invention, the simplification that degassed, acid adjustment integrated apparatus successfully achieves oxynitride price modification equipment, eliminate a filled column and agitator, adopt it to Purex flow BP price modification, operation that is degassed, acid adjustment is also corresponding is simplified.Significantly, coordinate Purex flow BP of the present invention price modification, degassed, acid adjustment integrated apparatus, the price modification adopted, global design that is degassed, acid adjustment technical process are able to remarkable optimization, significantly reduce oxynitride consumption and vent gas treatment amount, process the BP feed liquid of identical amount, the consumption of oxynitride reduces more than 60%, and the lifting amplitude of oxynitride utilization ratio is very considerable.And the reduction of the simplification of equipment, oxynitride consumption and vent gas treatment amount all can significantly improve economy, thus save a large amount of nuclear fuel reprocessing costs.
Accompanying drawing explanation
Fig. 1 Purex flow BP of the present invention readjusts prices, degassed, acid adjustment integrated apparatus schematic diagram.
The existing Purex flow BP of Fig. 2 readjusts prices, degassed, acid adjustment device schematic diagram.
Reference numeral: 1. offgas outlet, 2.BP feed liquid opening for feed, 3. filled column, 4.NO2 opening for feed, 5. feed pipe, 6. feed liquid receiving tank, 7. price modification filled column offgas outlet, filled column aqueous phase outlet of 8. readjusting prices, filled column of 9. readjusting prices, 10.BP feed liquid opening for feed, 11.NO2 opening for feed, 12. price modification filled column air intlets, 13. degassing filler post offgas outlet, 14. the import of degassing filler post aqueous phase, 15. degassing filler posts, 16. degassing filler post air intlets, 17. concentrated nitric acid opening for feeds, 18. agitators, 19. feed liquid receiving tanks.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
Embodiment 1
Adopt that Purex flow BP of the present invention readjusts prices, degassed, acid adjustment integrated apparatus and method process certain 1BP feed liquid, reductive agent in this 1BP feed liquid is the salt-free reductive agent of dimethyl hydroxylamine-methyl hydrazine of China Atomic Energy Science Research Institute's research and development, and concrete steps are as follows:
(1) respectively by BP feed liquid opening for feed, NO
2opening for feed, feed pipe pass into BP feed liquid, NO continuously
2, air, make NO
2with reductive agent counter current contact generation redox reaction, the O in the air that the NO that reaction generates is passed into rapidly
2be oxidized to NO
2, continue and reductive agent generation redox reaction, thus realize the price modification of Pu, excessive oxynitride is delivered to exhaust treatment system by offgas outlet;
(2), after completing the price modification of Pu, stop passing into NO
2, continue through feed pipe and in feed liquid, pass into air to remove nitrous acid excessive in feed liquid, make it to be converted into oxynitride and be delivered to exhaust treatment system by offgas outlet;
(3) in feed liquid, add nitric acid by feed pipe, then pass into air to feed pipe and mixing is made it to feed liquid bubbling, complete the acidity adjustment of feed liquid.
Result shows, and adopt device and method of the present invention rapidly Pu (III) oxidation can be entirely Pu (IV), exhaustive oxidation destroys reductive agent.Actually operating complexity is lower, and process the 1BP feed liquid of identical amount, the consumption of oxynitride reduces 70%.
Embodiment 2
Adopt that Purex flow BP of the present invention readjusts prices, degassed, acid adjustment integrated apparatus and method process certain 2BP feed liquid, concrete steps are as follows:
(1) respectively by BP feed liquid opening for feed, NO
2opening for feed, feed pipe pass into BP feed liquid, NO continuously
2, air, make NO
2with reductive agent counter current contact generation redox reaction, the O in the air that the NO that reaction generates is passed into rapidly
2be oxidized to NO
2, continue and reductive agent generation redox reaction, thus realize the price modification of Pu, excessive oxynitride is delivered to exhaust treatment system by offgas outlet;
(2), after completing the price modification of Pu, stop passing into NO
2, continue through feed pipe and in feed liquid, pass into air to remove nitrous acid excessive in feed liquid, make it to be converted into oxynitride and be delivered to exhaust treatment system by offgas outlet;
(3) in feed liquid, add nitric acid by feed pipe, then pass into air to feed pipe and mixing is made it to feed liquid bubbling, complete the acidity adjustment of feed liquid.
Result shows, and adopt device and method of the present invention rapidly Pu (III) oxidation can be entirely Pu (IV), exhaustive oxidation destroys the residue reductive agent in this 2BP feed liquid.Actually operating complexity is lower, and process the 2BP feed liquid of identical amount, the consumption of oxynitride reduces 60%.
Claims (3)
1. Purex flow BP price modification, degassed, an acid adjustment integrated apparatus, is characterized in that:
Described Purex flow BP price modification, degassed, acid adjustment integrated apparatus comprise filled column and feed liquid receiving tank, are connected bottom described filled column with feed liquid receiving tank top; Filled column inside is filled with price modification filler;
Filled column is provided with BP feed liquid opening for feed and NO
2opening for feed, described BP feed liquid gating location is higher than NO
2opening for feed; Filled column top is provided with offgas outlet;
Feed liquid receiving tank is provided with the feed pipe in the portion of inserting into the inner.
2. Purex flow BP price modification as claimed in claim 1, degassed, acid adjustment integrated apparatus, is characterized in that: described NO
2the distance of opening for feed and filled column bottom is 0.3 ~ 0.5m.
3. adopt Purex flow BP as claimed in claim 1 or 2 price modification, degassed, the price modification of acid adjustment integrated apparatus, degassed a, acid-adjusting method, it is characterized in that the method comprises the following steps:
(1) respectively by BP feed liquid opening for feed, NO
2opening for feed, feed pipe pass into BP feed liquid, NO continuously
2, air, make NO
2with reductive agent counter current contact generation redox reaction, the O in the air that the NO that reaction generates is passed into rapidly
2be oxidized to NO
2, continue and reductive agent generation redox reaction, thus realize the price modification of Pu, excessive oxynitride is delivered to exhaust treatment system by offgas outlet;
(2), after completing the price modification of Pu, stop passing into NO
2, continue through feed pipe and in feed liquid, pass into air to remove nitrous acid excessive in feed liquid, make it to be converted into oxynitride and be delivered to exhaust treatment system by offgas outlet;
(3) in feed liquid, add nitric acid by feed pipe, then pass into air to feed pipe and mixing is made it to feed liquid bubbling, complete the acidity adjustment of feed liquid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167261.7A CN104789782A (en) | 2015-04-10 | 2015-04-10 | BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510167261.7A CN104789782A (en) | 2015-04-10 | 2015-04-10 | BP price-adjusting, degassing and acid-adjusting integrated device and method in Purex process |
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| CN104789782A true CN104789782A (en) | 2015-07-22 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884098A (en) * | 2015-12-15 | 2017-06-23 | 中核四○四有限公司 | A kind of system and method for the price adjustment of feed liquid containing plutonium |
| CN107369486A (en) * | 2017-07-27 | 2017-11-21 | 中国原子能科学研究院 | The regulation of 2AF and OF feed liquids prepares integrated system in a kind of aftertreatment technology flow |
| CN108682466A (en) * | 2018-05-22 | 2018-10-19 | 中国原子能科学研究院 | A kind of oxidation unit and method of the feed liquid containing plutonium |
| CN108922645A (en) * | 2018-08-23 | 2018-11-30 | 中国原子能科学研究院 | The adjusting preparation facilities of 2AF feed liquid in nuclear fuel aftertreatment technology process |
| CN109390067A (en) * | 2018-11-13 | 2019-02-26 | 中国原子能科学研究院 | The pretreatment unit of uranium crude product liquid 1CU in a kind of aftertreatment technology process |
| CN110759322A (en) * | 2019-09-16 | 2020-02-07 | 中国核电工程有限公司 | Acid recovery method and device for dissolved exhaust gas generated by spent fuel aftertreatment |
| CN114684843A (en) * | 2020-12-25 | 2022-07-01 | 中核四0四有限公司 | Method for quickly oxidizing oxalic acid |
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| CN102412002A (en) * | 2011-09-06 | 2012-04-11 | 中国原子能科学研究院 | N2O4Device for oxidation regulation of plutonium valence state |
| CN103896345A (en) * | 2014-02-27 | 2014-07-02 | 中国原子能科学研究院 | Method and device for oxidative adjustment of plutonium valence with NOx |
| CN104328291A (en) * | 2014-10-20 | 2015-02-04 | 中国原子能科学研究院 | Oxidizing valence-adjusting equipment for oxidizing Pu (III) to Pu (IV) |
| CN104332210A (en) * | 2014-10-20 | 2015-02-04 | 中国原子能科学研究院 | Apparatus for removing nitrous acid in reprocessing feed solution |
| CN204570004U (en) * | 2015-04-10 | 2015-08-19 | 中国原子能科学研究院 | Purex flow BP price modification, degassed, acid adjustment integrated apparatus |
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Patent Citations (5)
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| CN103896345A (en) * | 2014-02-27 | 2014-07-02 | 中国原子能科学研究院 | Method and device for oxidative adjustment of plutonium valence with NOx |
| CN104328291A (en) * | 2014-10-20 | 2015-02-04 | 中国原子能科学研究院 | Oxidizing valence-adjusting equipment for oxidizing Pu (III) to Pu (IV) |
| CN104332210A (en) * | 2014-10-20 | 2015-02-04 | 中国原子能科学研究院 | Apparatus for removing nitrous acid in reprocessing feed solution |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884098A (en) * | 2015-12-15 | 2017-06-23 | 中核四○四有限公司 | A kind of system and method for the price adjustment of feed liquid containing plutonium |
| CN107369486A (en) * | 2017-07-27 | 2017-11-21 | 中国原子能科学研究院 | The regulation of 2AF and OF feed liquids prepares integrated system in a kind of aftertreatment technology flow |
| CN108682466A (en) * | 2018-05-22 | 2018-10-19 | 中国原子能科学研究院 | A kind of oxidation unit and method of the feed liquid containing plutonium |
| CN108922645A (en) * | 2018-08-23 | 2018-11-30 | 中国原子能科学研究院 | The adjusting preparation facilities of 2AF feed liquid in nuclear fuel aftertreatment technology process |
| CN109390067A (en) * | 2018-11-13 | 2019-02-26 | 中国原子能科学研究院 | The pretreatment unit of uranium crude product liquid 1CU in a kind of aftertreatment technology process |
| CN109390067B (en) * | 2018-11-13 | 2024-10-18 | 中国原子能科学研究院 | Pretreatment device for uranium crude product liquid 1CU in post-treatment process flow |
| CN110759322A (en) * | 2019-09-16 | 2020-02-07 | 中国核电工程有限公司 | Acid recovery method and device for dissolved exhaust gas generated by spent fuel aftertreatment |
| CN114684843A (en) * | 2020-12-25 | 2022-07-01 | 中核四0四有限公司 | Method for quickly oxidizing oxalic acid |
| CN114684843B (en) * | 2020-12-25 | 2023-11-03 | 中核四0四有限公司 | Method for rapidly oxidizing oxalic acid |
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Application publication date: 20150722 |
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