CN216826132U - Bubbling reaction device - Google Patents
Bubbling reaction device Download PDFInfo
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- CN216826132U CN216826132U CN202220406219.1U CN202220406219U CN216826132U CN 216826132 U CN216826132 U CN 216826132U CN 202220406219 U CN202220406219 U CN 202220406219U CN 216826132 U CN216826132 U CN 216826132U
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Abstract
The utility model discloses a bubbling reaction device. The device comprises a kettle cover at the upper end of a bubbling reaction device and a reactor body; the kettle cover is detachably covered above the reactor body, and the upper end kettle cover is fixedly connected with the reactor body through a U-shaped flange; a crucible basket is sleeved in the reactor body; the crucible lifting basket is provided with a reaction cavity for accommodating a reactant to be reacted; the height of the reaction cavity is lower than or equal to that of the crucible lifting basket. The bubbling reaction device is suitable for places with radioactivity and strong corrosivity.
Description
Technical Field
The utility model particularly relates to a bubbling reaction device.
Background
Molten salt reactors are a type of liquid fuel reactor that fuses nuclear fuel in a liquid fluoride coolant, and are one of the candidate reactor types for fourth generation reactors. Liquid fluoride salts are used both as coolant and as carrier for nuclear fuels. On-line or off-line separation of isotopes (including fertile and fission products) can be achieved using dry separation techniques (elemental separation by melting spent fuel in liquid molten salt) as the coolant flows out of the reactor core.
Water is not used as a solvent in the process of the dry post-treatment of the spent fuel, and the main separation step is carried out at high temperature. The process has the advantages of radiation resistance, low critical risk, less radioactive waste and the like, and is suitable for treating spent fuel with high fuel consumption and short cooling period. Dry post-treatment, as a high-temperature chemical process, can be divided into a volatilization method, a high-temperature metallurgical process and the like according to different application technical principles. The volatilization methods are classified into a fluoride volatilization method, a chloride volatilization method, an oxidation volatilization method (voloximation), an oxidation reduction volatilization method (AIROX), and the like according to volatilization means. Among them, the fluoride volatilization method is the most studied.
The fluorination volatilization technology is an important dry post-treatment technology, and uranium is fluorinated into high-valence fluoride UF through the following reaction6：
UF4(d)+F2(g)→UF6(g)
Using UF6The uranium recovery device has low boiling point and is easy to volatilize, can realize the separation and recovery of uranium, and is commonly used in the fields of natural uranium conversion, uranium fuel purification and concentration, uranium recovery in MOX or uranium-containing metal elements and the like. The fluorination volatilization technology can realize the recovery of uranium in a molten salt system and realize the nuclear fuel circulation of a molten salt reactor.
The spent fuel reprocessing process is typically performed in a hot chamber. The hot room is a special sealing and shielding operation device commonly used in nuclear engineering, in particular spent fuel reprocessing plants, radiochemical laboratories, isotope production and research facilities. Its main functions are to provide the necessary biological shielding, sealed operating space and basic operating conditions for the operator and the adjacent personnel. Because of the existence of strong radiation active substances and strong corrosive atmosphere environment inside, workers can not directly operate inside the hot chamber and can only rely on a manipulator and a crane to perform remote operation.
The volatilization reaction of spent fuel in molten salt systems is usually carried out in a gas-liquid bubble reactor in a hot chamber. The gas-liquid bubbling reactor, as a spent fuel aftertreatment reaction site, is subjected to double corrosion of high-temperature molten salt and corrosive gas; and the operation in the hot room can only be accomplished by depending on manipulator and crane, therefore need urgently need one kind can satisfy under radioactivity, the use prerequisite in the strong corrosive site, can also be convenient for manipulator and crane operation's gas-liquid tympanic bulla reaction unit.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in overcoming the defect that the operation was accomplished to the complex, the manipulator of being not convenient for of prior art's bubbling reaction unit installation and crane, and provide a bubbling reaction unit. The application of bubbling reaction device is suitable for radioactivity, strong corrosive place to can be used for in the hot chamber, manipulator and crane operation of being convenient for.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
the utility model provides a bubbling reaction device, which comprises an upper kettle cover and a reactor body; the kettle cover is detachably covered above the reactor body, and the upper kettle cover is fixedly connected with the reactor body through a plurality of U-shaped flanges;
a crucible basket is sleeved in the reactor body; the crucible lifting basket is provided with a reaction cavity for accommodating a reactant to be reacted; the height of the reaction cavity is lower than or equal to that of the crucible lifting basket.
In the present invention, preferably, the opening of the crucible basket is lower than the opening of the reactor body by 5-10 cm.
In the utility model, the "the height of the reaction chamber is lower than or equal to the height of the crucible basket," the height of the reaction chamber is lower than the height of the crucible basket "generally means that the shape of the crucible basket is similar to the shape of a basket with a handle; by "the height of the reaction chamber is equal to the height of the crucible basket" it is generally meant that the crucible basket may be a cylindrical reactor.
The utility model discloses in, preferably, the crucible hand-basket sets a hand-basket lid, the crucible hand-basket with the hand-basket lid passes through the buckle and connects.
Wherein, preferably, the quantity of buckle is 2 ~ 5.
The 'buckle connection' can be realized in a mode that a buckle bolt is arranged on the lifting basket cover, a buckle groove for correspondingly accommodating the buckle bolt is formed in the opening of the crucible lifting basket, and the buckle bolt is matched with the buckle groove to realize the fixed connection and separation of the crucible lifting basket and the lifting basket cover.
The utility model discloses in, the diameter of crucible hand-basket is satisfying and being less than under the prerequisite of response ware body, can be according to how much adjustment crucible hand-basket's of waiting the reactant volume diameter to satisfy and wait that the reactant is located one-third to two-thirds department of the reaction chamber of crucible hand-basket.
The utility model discloses in, generally, be equipped with the air inlet on the upper end kettle cover. Generally, the air inlet on the upper kettle cover is connected to one end of an air pipe, and the other end of the air pipe is positioned in the reactant to be reacted.
Preferably, the other end of the vent pipe is located in the center of the bottom of the reaction cavity of the crucible basket.
Wherein, preferably, the other end of the breather pipe is provided with a gas distributor.
The material of the vent pipe can be any one of nickel metal, nickel-based alloy, stainless steel, copper, gold, silver, platinum, graphite and silicon carbide.
The utility model discloses in, generally, still be equipped with a gas outlet on the upper end cauldron lid for the output result. Generally, the outer wall of the reactor body is also provided with a vacuumizing port.
In the utility model, preferably, the thickness of the side wall of the crucible basket is 2-5 mm.
The utility model discloses in, generally, still be equipped with the pressure measurement component on the upper end kettle cover, be used for detecting pressure in the tympanic bulla reaction unit.
In the present invention, generally, the inner liner of the crucible basket is a nickel metal crucible inner liner, a nickel-based alloy crucible inner liner, a ceramic crucible inner liner or a graphite crucible inner liner.
The utility model discloses in, preferably, be equipped with rings on the upper end kettle cover to be convenient for crane and manipulator operation.
The utility model discloses in, preferably, the bubbling reaction device still includes the heater, the detachable cover of heater is located the bubbling reaction device outside is used for to the lateral wall and the diapire of reactor provide the heat. Preferably, the heater is also covered with an insulating layer.
The utility model discloses an above-mentioned bubbling reaction device can be as reaction unit in the reaction of fluoridizing recovery uranium that volatilizees.
The utility model discloses in, use generally including following step: placing a reactant to be reacted in a reaction cavity of the crucible lifting basket, and introducing reaction gas into the reactant to be reacted through an air inlet and an air pipe of the upper-end kettle cover to react; and outputting a reaction product through a gas outlet of the upper-end kettle cover.
In the present invention, the method for obtaining the molten solid molten salt generally comprises the following steps: the method comprises the steps of filling solid molten salt into a crucible basket, connecting a crucible basket cover with the crucible basket by using a mechanical arm in a buckling mode, placing the crucible basket in an inner cavity of the bubbling reaction device by using a hot-chamber crane, removing the basket cover by using the mechanical arm, placing an upper-end kettle cover above a kettle body by using a hot-chamber crane, sealing the reaction kettle by using the hot-chamber mechanical arm, removing air and water in a reaction system by using inert gas entering through a gas inlet, and heating until the molten salt is molten.
On the basis of meeting the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The reagent and the raw material used in the utility model are available on the market.
The utility model discloses an actively advance the effect and lie in: the utility model provides a can heat the indoor use, the manipulator is operatable, is suitable for the reaction unit of the great draw ratio of radioactivity, the strong corrosive site use fluoridize to volatilize and retrieve uranium.
Drawings
Fig. 1 is a schematic view of the structure of the bubble reaction apparatus in example 1.
FIG. 2 is a schematic top view of a crucible basket (including a basket lid) in example 1.
FIG. 3 is a schematic front view of a crucible basket (including a basket cover) in example 1.
Description of the reference numerals
Crucible basket 3
Snap fastener 501
Hanging ring 10
Detailed Description
The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
The bubble reaction device as shown in fig. 1 comprises an upper end kettle cover 1 and a reactor body 2; the kettle cover is detachably covered above the reactor body 2, and the upper end kettle cover 1 is fixedly connected with the reactor body 2 through a U-shaped flange;
a crucible basket 3 is sleeved in the reactor body 2; the crucible lifting basket 3 is provided with a reaction cavity 4 for accommodating a reactant to be reacted; the height of the reaction chamber 4 is lower than or equal to the height of the crucible basket 3.
In this embodiment, the opening of the crucible basket 3 is 8cm lower than the opening of the reactor body 2.
In this embodiment, the height of the reaction chamber 4 is equal to the height of the crucible basket 3, i.e. the crucible basket 3 is a cylindrical container.
In this embodiment, as shown in fig. 2(a) - (b) and fig. 3(a) - (b), a basket cover 5 is provided for the crucible basket 3, and the crucible basket 3 and the basket cover 5 are connected by a snap. Wherein, the quantity of buckle is 3.
The 'snap connection' is realized in such a manner that a snap bolt 501 is arranged on the basket cover 5, a snap groove 502 for correspondingly accommodating the snap bolt 501 is arranged at an opening of the crucible basket 3, when the snap bolt is located in the snap groove 502 of the dotted line, the crucible basket 3 is fixedly connected with the basket cover 5, and when the snap bolt is located in the snap groove 502 of the solid line, the crucible basket 3 is disconnected from the basket cover 5.
In this embodiment, be equipped with air inlet 6 on the upper end kettle cover 1, air inlet 6 on the upper end kettle cover 1 is connected to the one end of a breather pipe 7, and the other end of breather pipe 7 is arranged in waiting to react the thing.
Wherein, the other end of the breather pipe 7 is positioned at the center of the bottom of the reaction chamber 4 of the crucible basket 3.
Wherein, the other end of the breather pipe 7 is provided with a gas distributor.
Wherein, the material of breather pipe 7 is nickel metal.
In this embodiment, the upper kettle cover 1 is further provided with a gas outlet 8 for outputting a product; the outer wall of the reactor body 2 is also provided with a vacuum pumping port 9.
In this embodiment, the thickness of the side wall of the crucible basket 3 is 3 mm.
In this embodiment, the upper kettle cover 1 is further provided with a pressure detection element for detecting the pressure in the bubbling reaction device.
In this embodiment, the crucible basket 3 is a nickel metal crucible lining.
In this embodiment, lifting rings 10 are arranged on the upper-end kettle cover 1, so that the crane and the manipulator can operate conveniently.
In this embodiment, the bubble reaction apparatus further includes a heater 11, and the heater 11 is detachably sleeved outside the bubble reaction apparatus and is used for providing heat to the side wall and the bottom wall of the reactor. The heater 11 is also covered with a heat-insulating layer.
The bubbling reaction device is used as a reaction device in the reaction of recovering uranium by fluorination and volatilization. The method specifically comprises the following steps:
(1) filling solid FLiBe molten salt with the uranium content of 5 wt.% into a reaction cavity 4 of a crucible basket 3, covering and lifting the basket cover 5, putting the crucible basket 3 into a reactor body 2 through a manipulator, removing the basket cover 5, covering an upper kettle cover 1, closing an air inlet 6 and an air outlet 8, opening a vacuumizing port 9, and standing for a period of time; closing the vacuumizing port 9, opening the air inlet 6, and removing air and water in the reaction system by using pure argon gas in a replacement way; then the vacuumizing port 9 is closed, and the gas inlet 6 and the gas outlet 8 are closed;
(2) heating the reactor to raise the temperature from room temperature to 200 ℃, and then preserving the heat for 2 hours; and replacing the atmosphere in the reaction kettle with pure argon after the heat preservation is finished so as to remove water generated in the heating process.
(3) Continuously heating the reaction kettle to enable the temperature to reach 550 ℃; keeping the temperature for 3h until the molten salt is completely molten, and introducing fluorine-argon mixed gas (the volume fraction of F2 is 20%) into the molten fluorine salt in the reaction kettle from the air inlet 6 and the air pipe 7 through a mass flow meter at a flow rate of 0.4L/min;
(4) and after the reaction is stopped, stopping heating, stopping introducing the fluorine-argon mixed gas, and after the reaction is finished, purging the reaction kettle and the pipeline for 30min by using argon with the flow rate of 0.6L/min. The system was then evacuated and the cycle was repeated for a total of 6 times. And opening the reactor to take out the molten salt, and detecting that the content of U in the molten salt after fluorination is 25ppm, wherein the content of possible corrosion product elements such as Cr, Ni and Fe is not obviously increased. The nickel crucible lining is shown to effectively protect the reactor and avoid the pollution of corrosion products to the process medium. The gas circulation in the whole reaction process is smooth, the outlet gas path is not blocked, the product is not condensed and deposited above the reactor, and the final product is output from the gas outlet 8.
Although particular embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are examples only and that the scope of the present invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (10)
1. A bubbling reaction device is characterized by comprising an upper-end kettle cover and a reactor body; the upper-end kettle cover is detachably covered above the reactor body, and the upper-end kettle cover is fixedly connected with the reactor body through a U-shaped flange;
a crucible basket is sleeved in the reactor body; the crucible lifting basket is provided with a reaction cavity for accommodating a reactant to be reacted; the height of the reaction cavity is lower than or equal to that of the crucible lifting basket.
2. The bubble reaction device according to claim 1, wherein the opening of the crucible basket is 5 to 10cm lower than the opening of the reactor body.
3. The bubble reaction device according to claim 1, wherein the crucible basket is provided with a basket cover, and the crucible basket is connected with the basket cover by a snap fit;
wherein, the quantity of buckle is 2 ~ 5.
4. The bubble reaction apparatus according to claim 1, wherein said upper cover is provided with an air inlet.
5. The bubble reaction device according to claim 1, wherein the air inlet of the upper kettle cover is connected to one end of an air pipe, and the other end of the air pipe is positioned in the reactant.
6. The bubble reaction device according to claim 5, wherein the other end of the vent pipe is located at the center of the bottom of the reaction chamber of the crucible basket;
and the other end of the breather pipe is provided with a gas distributor.
7. The bubble reaction device according to claim 1, wherein the upper cover is further provided with a gas outlet;
the outer wall of the reactor body is also provided with a vacuum-pumping port.
8. The bubble reaction apparatus according to claim 1, wherein the crucible carrier has a sidewall thickness of 2 to 5 mm.
9. The bubble reaction device according to claim 1, wherein the upper cover is further provided with a pressure detection element; and a lifting ring is arranged on the upper-end kettle cover.
10. The bubble reaction device according to claim 1, wherein the bubble reaction device further comprises a heater detachably sleeved outside the bubble reaction device; and an insulating layer is coated outside the heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220406219.1U CN216826132U (en) | 2022-02-21 | 2022-02-21 | Bubbling reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220406219.1U CN216826132U (en) | 2022-02-21 | 2022-02-21 | Bubbling reaction device |
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| Publication Number | Publication Date |
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| CN216826132U true CN216826132U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220406219.1U Active CN216826132U (en) | 2022-02-21 | 2022-02-21 | Bubbling reaction device |
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| CN (1) | CN216826132U (en) |
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- 2022-02-21 CN CN202220406219.1U patent/CN216826132U/en active Active
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