CN204204437U - A kind of equipment removing nitrous acid in aftertreatment feed liquid - Google Patents
A kind of equipment removing nitrous acid in aftertreatment feed liquid Download PDFInfo
- Publication number
- CN204204437U CN204204437U CN201420606350.8U CN201420606350U CN204204437U CN 204204437 U CN204204437 U CN 204204437U CN 201420606350 U CN201420606350 U CN 201420606350U CN 204204437 U CN204204437 U CN 204204437U
- Authority
- CN
- China
- Prior art keywords
- tower
- feed liquid
- nitrous acid
- aftertreatment
- equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 76
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 239000000463 material Substances 0.000 claims abstract description 22
- 239000000945 filler Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- 239000008236 heating water Substances 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 6
- 239000003758 nuclear fuel Substances 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract description 3
- 238000012805 post-processing Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 229910052778 Plutonium Inorganic materials 0.000 description 5
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 230000002829 reductive effect Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Substances NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 235000013409 condiments Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- WJWSFWHDKPKKES-UHFFFAOYSA-N plutonium uranium Chemical compound [U].[Pu] WJWSFWHDKPKKES-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Landscapes
- Degasification And Air Bubble Elimination (AREA)
Abstract
The utility model belongs to nuclear fuel post-processing technology field, discloses in a kind of nuclear fuel aftertreatment Purex flow for removing the equipment of nitrous acid in aftertreatment feed liquid.This equipment comprises and removes tower, air generator and feed liquid receiving tank, and the upper end wherein removing tower is equipped with liquor inlet, and lower end is provided with air intake, and bottom is provided with material liquid outlet, and the outer tower wall removing tower is provided with heating arrangement; Feed liquid receiving tank is connected by feed liquid efferent duct with the material liquid outlet removing tower bottom; Remove tower inside and be provided with filler, pending feed liquid enters Ta Nei from the liquor inlet removing tower and contacts with the air inversion entered by air intake.This equipment has that nitrous acid removal effect is good, speed is fast, can continued operation and the high beneficial effect of processing power.
Description
Technical field
The utility model belongs to nuclear fuel post-processing technology field, is specifically related to the equipment removing nitrous acid in aftertreatment feed liquid in nuclear fuel aftertreatment Purex flow.
Background technology
The aftertreatment technology flow process of present research adopts U (IV)-hydrazine, azanol-hydrazine or N, the reductive agents such as N-dimethyl hydroxylamine-methyl hydrazine carry out reduction reextraction Pu (III), in the 1BP feed liquid that uranium plutonium obtains after being separated, plutonium is trivalent, next step to be undertaken by extraction and back extraction the purification of plutonium concentrated before, Pu (III) need be oxidized to Pu (IV).Add oxides of nitrogen etc. oxidizing after can make containing certain content in feed liquid nitrous acid, the nitrous acid of existence can have an impact to subsequent technique, as the loss of the luxus consumption or plutonium that cause reductive agent, therefore, need remove nitrous acid wherein.The removal methods of nitrous acid mainly contains air carrying band method, vacuumizes removal method, ultrasonic removal method and heating etc., and wherein air carrying band method adopts in solution, pass into air, utilizes air to be gone out with the form carrier band of oxides of nitrogen by the nitrous acid in solution; Vacuumizing removal method is utilize the amount of nitrogen oxides vacuumizing and reduce in gas phase, promotes that nitrous acid resolves into oxides of nitrogen and enters gas phase, thus is removed by the nitrous acid in solution; Ultrasonic removal method utilizes the molecular motion in ultrasound wave quickening solution, decompose thus remove from solution, but the equipment vacuumizing removal method and ultrasonic removal method is complicated after nitrous acid stability is reduced, more difficult for hot operation; Heating passes through heated solution, make the nitrous acid in system resolve into oxides of nitrogen to overflow to reach the object removed from solution, the speed that heating removes nitrous acid is slower, and the Pu (IV) in feed liquid is easily oxidizing to Pu (VI) by heating, has a negative impact to subsequent technique.Integrated comparative, air carrying band method has following clear superiority: do not introduce reagent, and required equipment is few, is easy to control, and is easy to realize continued operation and can improves productive capacity.
At present, remove equipment for nitrous acid in nuclear fuel aftertreatment Purex flow, employing be pass into air bubbling in the plutonium feed liquid storage tank after batch condiment, to reach the effect removing nitrous acid, be not suitable for and remove nitrous acid on a large scale.
Utility model content
(1) utility model object
Problem existing for prior art, the utility model provides that a kind of nitrous acid removal effect is good, speed is fast and processing power the is high nitrous acid for aftertreatment feed liquid removes equipment.
(2) technical scheme
For solving the problem existing for prior art, the utility model is achieved through the following technical solutions:
A kind of equipment removing nitrous acid in aftertreatment feed liquid, this equipment comprises and removes tower, air generator and feed liquid receiving tank, and the upper end wherein removing tower is equipped with liquor inlet, and lower end is provided with air intake, bottom is provided with material liquid outlet, and the outer tower wall removing tower is provided with heating arrangement; Feed liquid receiving tank is connected by feed liquid efferent duct with the material liquid outlet removing tower bottom; Remove tower inside and be provided with filler, pending feed liquid enters Ta Nei from the liquor inlet removing tower and contacts with the air inversion entered by air intake.
Preferably, remove the main body of tower described in, inner stuffing is resistance to irradiation, the corrosion material of resistance to nitric acid.
Preferably, described in remove tower top be provided with demister, the rear end of demister is equipped with cyclone separator.
Preferably, remove tower described in be built-in with one or more sieve plate filler is separated.
Preferably, described in remove the heating arrangement that tower outer tower wall is arranged be electric boiling plate fixing on tower wall or the heat tape be wound around on tower wall or heating water jacket, make feed temperature in tower be 30 ~ 50 DEG C.
Preferably, described in remove the nozzle opening direction of tower air intake down, the feed liquid flowed down from tower upper end can be avoided to enter air generator.
Preferably, pending feed liquid enters liquor inlet by feed liquid discharge pump via feed liquid input pipe, and feed liquid input pipe is provided with retaining valve.
Preferably, the air passed into from air intake is 50 ~ 500 with the volume flow ratio of the feed liquid passed into from liquor inlet.
Preferably, the top and the bottom that remove tower described in are equipped with pressure-measuring device and temperature measuring set.
Preferably, described in remove tower main body, filler and sieve plate material be stainless steel, wherein filler is the western tower ring of stainless steel.
Preferably, described air generator is fan blower or air compressor.
Preferably, being provided with the material of Absorbable rod neutron at the middle part of oxidizing tower or tower wall, wherein absorbing the material of neutron for containing
10b or
6the material of Li.
(3) beneficial effect
The equipment of what the utility model provided remove nitrous acid in aftertreatment feed liquid, it adopts and towerly removes equipment, subtractive process adopts gas as continuous phase, liquid is as disperse phase, feed liquid contacts with air at filling surface, the filler placed in tower can increase gas liquid interfacial area, is beneficial to removing of nitrous acid.In addition this equipment is also equipped with demister, cyclone separator, and temperature and pressure-measuring device etc. improve treatment scale, has that nitrous acid removal effect is good, speed is fast, can continued operation and the high beneficial effect of processing power, and specific explanations is:
1) during extensive price modification process, the filler removed in tower too much to cause at the bottom of tower burden heavy and the inner-tower filling material problem of sinking because of Action of Gravity Field, by arranging sieve plate in the filler removing tower inside, alleviate the heavy burden burden at the bottom of tower, also make the distribution of filler in tower that remove in tower more stable simultaneously.
2) arrange heating arrangement removing on tower outer tower wall, for the feed liquid removed in tower heats up, what improve nitrous acid removes speed.
3) the nozzle opening direction removing the bottom air inlet of tower, makes air Jet with downward flow direction down, and the feed liquid flowed down from tower upper end can be avoided to enter air generator.
4) on a large scale to feed liquid carry out nitrous acid remove time, there is criticality safety problem in plutonium feed liquid, the application by remove the material that Absorbable rod neutron is set in the middle of tower or on tower wall can head it off.
Accompanying drawing explanation
Fig. 1 is that the nitrous acid that the utility model embodiment 1 provides removes device schematic diagram, wherein:
1. air generator 2. removes tower 3. air intake 4. bottom temp measuring instrument 5. base pressure measuring instrument 6. filler 7. electric boiling plate 8. head temperature measuring instrument 9. top pressure measuring instrument 10. demister 11. cyclone separator 12. offgas outlet 13. liquor inlet 14. feed liquid feed flow meter 15. feed liquid discharge pump 16. material liquid outlet 17. feed liquid receiving tank.
Embodiment
Below in conjunction with specification drawings and specific embodiments, the utility model is further elaborated.
Embodiment 1
A kind of equipment removing nitrous acid in aftertreatment feed liquid, as shown in Figure 1, this equipment comprises and removes tower 2 (significant height is 2350mm, diameter is 273mm), air generator 1 and feed liquid receiving tank 17, the upper end wherein removing tower 2 is equipped with liquor inlet 13, and lower end is provided with air intake 3, bottom is provided with material liquid outlet 16, inside is provided with filler 6, the outer tower wall removing tower 2 is provided with electric boiling plate 7, makes feed temperature in tower be 30 DEG C; Pending feed liquid enters liquor inlet 13 by feed liquid discharge pump 15 via feed liquid input pipe, contacts with the air inversion entered by air intake 3, wherein feed liquid input pipe is provided with retaining valve.Feed liquid receiving tank 17 is connected by feed liquid efferent duct with the material liquid outlet 16 removing tower 2 bottom;
Described air generator 1 is fan blower, and remove the main body of tower 2, the material of inner stuffing 6 is stainless steel, wherein filler is the western tower ring of stainless steel.The top and the bottom that remove tower 2 are equipped with pressure-measuring device and temperature measuring set.The air passed into from air intake is 50 with the volume flow ratio of the feed liquid passed into from liquor inlet.
Adopt the equipment described in embodiment 1, removing of nitrous acid is carried out to aftertreatment feed liquid, processing power is 100L/h, wherein feed liquid consists of: concentration of nitric acid: 2.2mol/L, U (VI) concentration: 2g/L, Fe (III) concentration: 10g/L, through remove tower 2 remove after the content of nitrous acid be 0.08mol/L.
Embodiment 2
As different from Example 1, remove tower 2 and be built-in with one or more sieve plate filler is separated, remove in the middle part of tower 2 and be equipped with neutron absorber material
10b
4c.Removing the heating arrangement that tower 2 outer tower wall is arranged is the heat tape be wound around on tower wall, makes feed temperature in tower be 50 DEG C.The top removing tower 2 is provided with demister 10, and the rear end of demister 10 is equipped with cyclone separator 11.The air passed into from air intake is 200 with the volume flow ratio of the feed liquid passed into from liquor inlet.Air generator is air compressor.
Adopt the equipment described in embodiment 1, removing of nitrous acid is carried out to aftertreatment feed liquid, processing power is 100L/h, wherein feed liquid consists of: concentration of nitric acid: 2.1mol/L, U (VI) concentration: 2g/L, Fe (III) concentration: 10g/L, through remove tower 2 remove after the content of nitrous acid be 0.07mol/L.
Embodiment 3
As different from Example 1, remove tower 2 and be built-in with one or more sieve plate filler is separated, remove on tower 2 tower wall and be equipped with neutron absorber material
6liF.Removing the heating arrangement that tower 2 outer tower wall is arranged is the heating water jacket be wound around on tower wall, makes feed temperature in tower be 40 DEG C.The air passed into from air intake is 350 with the volume flow ratio of the feed liquid passed into from liquor inlet.Air generator is air compressor.
Adopt the equipment described in embodiment 1, removing of nitrous acid is carried out to aftertreatment feed liquid, processing power is 100L/h, wherein feed liquid consists of: concentration of nitric acid: 2.4mol/L, U (VI) concentration: 2g/L, Fe (III) concentration: 10g/L, through remove tower 2 remove after the content of nitrous acid be 0.09mol/L.
Claims (10)
1. one kind removes the equipment of nitrous acid in aftertreatment feed liquid, it is characterized in that, this equipment comprises and removes tower, air generator and feed liquid receiving tank, the upper end wherein removing tower is equipped with liquor inlet, lower end is provided with air intake, bottom is provided with material liquid outlet, and the outer tower wall removing tower is provided with heating arrangement; Feed liquid receiving tank is connected by feed liquid efferent duct with the material liquid outlet removing tower bottom; Remove tower inside and be provided with filler, pending feed liquid enters Ta Nei from the liquor inlet removing tower and contacts with the air inversion entered by air intake.
2. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described in remove the main body of tower, inner stuffing is resistance to irradiation, the corrosion material of resistance to nitric acid.
3. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described in remove tower top be provided with demister, the rear end of demister is equipped with cyclone separator.
4. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described in remove tower and be built-in with one or more sieve plate filler is separated.
5. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, it is characterized in that, the described heating arrangement that tower outer tower wall is arranged that removes is electric boiling plate or the heat tape be wound around on tower wall or heating water jacket that tower wall is fixed, makes feed temperature in tower be 30 ~ 50 DEG C.
6. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described air intake is opening direction nozzle down.
7. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, the middle part removing tower described or tower wall are provided with the material of Absorbable rod neutron.
8. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, the air passed into from air intake is 50 ~ 500 with the volume flow ratio of the feed liquid passed into from liquor inlet.
9. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described in remove the top of tower and bottom is equipped with pressure-measuring device and temperature measuring set.
10. a kind of equipment removing nitrous acid in aftertreatment feed liquid according to claim 1, is characterized in that, described in remove tower main body, filler and sieve plate material be stainless steel, wherein filler is the western tower ring of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420606350.8U CN204204437U (en) | 2014-10-20 | 2014-10-20 | A kind of equipment removing nitrous acid in aftertreatment feed liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420606350.8U CN204204437U (en) | 2014-10-20 | 2014-10-20 | A kind of equipment removing nitrous acid in aftertreatment feed liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204204437U true CN204204437U (en) | 2015-03-11 |
Family
ID=52662369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420606350.8U Expired - Lifetime CN204204437U (en) | 2014-10-20 | 2014-10-20 | A kind of equipment removing nitrous acid in aftertreatment feed liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204204437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470593A (en) * | 2018-01-24 | 2018-08-31 | 中国原子能科学研究院 | The treatment process of ammonium diuranate mother liquor of precipitation of ammonium |
-
2014
- 2014-10-20 CN CN201420606350.8U patent/CN204204437U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108470593A (en) * | 2018-01-24 | 2018-08-31 | 中国原子能科学研究院 | The treatment process of ammonium diuranate mother liquor of precipitation of ammonium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20150311 |