CN219958560U - Multipath uniform feeding device for treating radioactive waste resin in molten salt bath - Google Patents
Multipath uniform feeding device for treating radioactive waste resin in molten salt bath Download PDFInfo
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- CN219958560U CN219958560U CN202320394839.2U CN202320394839U CN219958560U CN 219958560 U CN219958560 U CN 219958560U CN 202320394839 U CN202320394839 U CN 202320394839U CN 219958560 U CN219958560 U CN 219958560U
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- Prior art keywords
- feeding
- resin
- flange
- melting furnace
- feeding device
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- 239000011347 resin Substances 0.000 title claims abstract description 75
- 229920005989 resin Polymers 0.000 title claims abstract description 75
- 150000003839 salts Chemical class 0.000 title claims abstract description 37
- 239000002901 radioactive waste Substances 0.000 title abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 34
- 230000008018 melting Effects 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 239000000498 cooling water Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 12
- 239000002699 waste material Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 6
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000238413 Octopus Species 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910001119 inconels 625 Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000003608 radiolysis reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model relates to a multi-path uniform feeding device for treating radioactive waste resin in a molten salt bath, which is arranged on a melting furnace and comprises a flange plate, a resin feeding pipeline, a feeding branch pipe, a plurality of discharging holes, an air inlet and a salt feeding pipeline, wherein the flange plate is arranged on the melting furnace in a sealing manner; along the discharging direction, the opening areas of the discharging holes are sequentially increased. Compared with the prior art, the utility model can realize multi-path uniform feeding of the radioactive waste resin under the high temperature condition, forms a fountain-like passage by controlling the airflow velocity to strike through the liquid seal interface of the molten salt bath, breaks through round holes which are distributed in sequence from small to large and from inside to outside on a bottom multi-way branch pipe under the action of a gas carrier band, and ensures that the resin can be dispersed into the molten salt bath in a molten state in the feeding process.
Description
Technical Field
The utility model belongs to the technical field of radioactive waste resin treatment, and relates to a multi-path uniform feeding device for treating radioactive waste resin in a molten salt bath.
Background
With the rapid development of the nuclear industry in China, a certain amount of radioactive waste resin is generated. The waste resins are subjected to pulverization and hardening after long-term storage, and the contained radioactivity can damage the structure of the resins to a certain extent, so that the waste resins have strong corrosiveness to equipment and facilities; radioactivity in the material can also escape, which makes further processing difficult, and is a material that has not yet reached its final stable state, requiring further safe handling for final disposal or reaching a stable state.
The radioactive waste resin belongs to organic substances, is fine particles with higher water content, has the characteristics of inflammability, easy leakage, easy explosion gas generation after radiolysis or pyrolysis, and the like, is quickly carbonized in the presence of open fire and can generate unpleasant and sharp smell, and particularly, the radioactive waste resin is difficult to feed in the form of original particles under the high-temperature condition. It is therefore necessary to provide a multi-path uniform feeding device that is safe, smokeless, and resistant to open fire for the treatment of radioactive waste resins in molten salt baths.
Disclosure of Invention
The utility model aims to provide a multi-path uniform feeding device for treating radioactive waste resin in a molten salt bath, which is used for enabling the radioactive waste resin to exist in a more stable state and facilitating subsequent treatment.
The aim of the utility model can be achieved by the following technical scheme:
the multipath uniform feeding device is arranged on the melting furnace and comprises a flange plate, a resin feeding pipeline, a feeding branch pipe, a plurality of discharging holes, an air inlet and a salt feeding pipeline, wherein the flange plate is arranged on the melting furnace in a sealing mode; along the discharging direction, the opening areas of the discharging holes are sequentially increased.
Further, the feed branch pipe extends along the radial direction of the resin feed pipeline.
Further, the feeding branch pipes are provided with a plurality of feeding branch pipes and are radially arranged at the bottom ends of the resin feeding pipelines.
Further, the bottom end of the resin feeding pipeline is provided with 6-10 feeding branch pipes.
Further, a plurality of discharge holes are distributed on the upper side surface and the outer end of the feeding branch pipe.
Further, a cooling jacket is also sleeved on the resin feeding pipe, and a jacket cooling water inlet and a jacket cooling water outlet are arranged on the cooling jacket.
Further, the flange plate is internally embedded with a flange cooling pipeline, and the flange plate is provided with a flange cooling water inlet and a flange cooling water outlet.
Further, the bottom of the flange plate is provided with a sealing plate, and the outer edge of the sealing plate is in sealing contact with the melting furnace.
Further, the flange plate is provided with an exhaust port in a penetrating way.
Further, the flange plate is also provided with a thermometer extending into the melting furnace.
Compared with the prior art, the utility model has the following characteristics:
1) The utility model can realize the multi-path uniform feeding of the radioactive waste resin under the high temperature condition, forms a fountain-like passage by controlling the airflow velocity to penetrate through the liquid seal interface of the molten salt bath, breaks through round holes which are distributed in sequence from small to large and from inside to outside on a bottom multi-way branch pipe under the action of a gas carrier band, and ensures that the resin can be dispersed into the molten salt bath in a molten state in the feeding process;
2) The utility model can smoothly convey the small-particle and open-fire easy-to-burn carbonized radioactive waste resin into the molten salt bath in a high-temperature flowing state at the high temperature of 700-1000 ℃ in a nitrogen carrier band mode, and realizes long-time stay of the radioactive waste resin in the molten salt bath by changing the height of a feeding device from the bottom of a melting furnace and adjusting the flow of nitrogen, thereby effectively improving the decomposition efficiency of the radioactive waste resin.
Drawings
Fig. 1 is a schematic front view of a multi-path uniform feeding device in an embodiment;
FIG. 2 is an assembly view of a feed manifold and resin feed lines;
FIG. 3 is a schematic diagram of a resin feed path;
FIG. 4 is a schematic top view of a multi-path uniform feeding device according to an embodiment;
the figure indicates:
1-resin feeding pipeline, 2-jacket cooling water inlet, 3-jacket cooling water outlet, 4-cooling jacket, 5-air inlet, 6-flange, 7-salt feeding pipeline, 8-sealing plate, 9-feeding branch pipe, 10-discharge hole, 11-thermometer, 12-air outlet, 13-flange cooling water inlet, 14-melting furnace, 15-molten salt interface, 16-resin feeding passage, 17-resin distributing passage and 18-flange cooling water outlet.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples. The following examples are given with the above technical solutions of the present utility model as a premise, and detailed embodiments and specific operation procedures are given, but the scope of protection of the present utility model is not limited to the following examples.
Examples:
the multi-path uniform feeding device shown in fig. 1 is arranged on a melting furnace 14 and comprises a flange 6, a resin feeding pipeline 1, a feeding branch pipe 9, a plurality of discharging holes 10, an air inlet 5, an air outlet 12 and a salt feeding pipeline 7, wherein the flange 6 is arranged on the melting furnace 14 in a sealing manner, the resin feeding pipeline 1 penetrates through the flange 6, the bottom end of the resin feeding pipeline 1 extends into the melting furnace 14, the discharging holes 10 are formed in the feeding branch pipe 9, the air inlet 5 is communicated with the resin feeding pipeline 1, the air outlet 12 is arranged on the flange 6, and the salt feeding pipeline 7 is arranged on the flange 6 and is communicated with the melting furnace 14.
When in use, the salt bath treatment device for radioactive waste resin is formed by the feeding device and the melting furnace 14, carbonate is added through the salt feeding pipeline 7 and heated to a molten state, and the radioactive waste resin is discharged from the resin feeding pipeline 1 and a plurality of discharging holes 10 on the feeding branch pipe 9 above the bottom of the melting furnace 14 and enters the melting furnace 14.
In some specific embodiments, as shown in fig. 2, a plurality of feeding branch pipes 9 are provided and are radially arranged at the bottom end of the resin feeding pipeline 1, and the design concept refers to octopus. Preferably, 6 to 10 feeding branch pipes 9 are arranged at the bottom end of the resin feeding pipeline 1.
In some specific embodiments, the opening areas of the plurality of discharge holes 10 on the feeding branch pipe 9 are sequentially increased along the discharge direction, so as to ensure that the resin can be dispersed into the molten salt bath in a molten state in the feeding process.
In some specific embodiments, the discharge holes 10 are distributed on the upper side and the outer end of the feeding branch pipe 9, and the discharge holes 10 arranged on the outer end can be used for reducing the residue in the branch pipe when molten salt is discharged.
The air inlet 5 is used for introducing protective gas nitrogen and oxidizing gas air into the melting furnace 14; and meanwhile, under the action of gas, the liquid sealing interface of molten carbonate is penetrated through by controlling the flow speed of the gas flow to be immersed into the molten salt bath, and the bottom feeding branch pipe 9 is broken through under the action of the carrier band of the gas flow to enter the molten salt bath in the melting furnace 14. Accordingly, the exhaust port 12 provided in the flange 6 is used to equalize the air pressure in the melting furnace 14.
By changing the height of the feeding branch pipe 9 from the bottom of the melting furnace 14 and adjusting the flow of nitrogen, the stay time of the radioactive waste resin in the molten salt bath can be realized, and the molten salt oxidative decomposition efficiency is improved:
example 1:
as shown in fig. 3, the height of the resin feeding pipeline 1 from the bottom of the melting furnace 14 is regulated to be 50mm, the flow rate of nitrogen is regulated to be 10min/L, gas can penetrate through the molten salt interface 15 of the molten salt bath to form a fountain-like resin feeding channel 16 and a resin separating channel 17, 5kg of waste resin is oxidized in 5kg of carbonate bath, the oxidation time is 8h, and the decomposition efficiency of the waste resin can reach 98.31%;
example 2:
the height of the resin feeding pipeline 1 from the bottom of the melting furnace 14 is regulated to be 30mm, the flow rate of nitrogen is regulated to be 13min/L, gas can penetrate through the molten salt interface 15 of the molten salt bath to form a fountain-like resin feeding channel 16 and a resin distributing channel 17, 5kg of waste resin is oxidized in 5kg of carbonate bath, the oxidation time is 8h, and the decomposition efficiency of the waste resin can reach 98.86%.
Example 3:
the height of the resin feeding pipeline 1 from the bottom of the melting furnace 14 is regulated to be 10mm, the flow rate of nitrogen is regulated to be 15min/L, gas can penetrate through the molten salt interface 15 of the molten salt bath to form a fountain-like resin feeding channel 16 and a resin distributing channel 17, 5kg of waste resin is oxidized in 5kg of carbonate bath, the oxidation time is 8h, and the decomposition efficiency of the waste resin can reach 99.16%.
Example 4:
the height of the resin feeding pipeline 1 from the bottom of the melting furnace 14 is adjusted to be 5mm, the flow rate of nitrogen is adjusted to be 18min/L, gas can penetrate through the molten salt interface 15 of the molten salt bath to form a fountain-like resin feeding channel 16 and a resin distributing channel 17, 5kg of waste resin is oxidized in 5kg of carbonate bath, the oxidation time is 8h, and the decomposition efficiency of the waste resin can reach 99.52%.
In some specific embodiments, a cooling jacket 4 is further sleeved on the resin feeding pipeline 1, and a jacket cooling water inlet 2 and a jacket cooling water outlet 3 are arranged on the cooling jacket 4. The waste resin feed passage is designed in the pipe layer, the cooling water circulation passage is designed in the shell layer, and the air inlet 5 is located below the cooling jacket 4 to prevent the back channeling of hot steam in the melting furnace 14.
In some specific embodiments, the resin feed line 1 is designed to have a wall thickness of phi 70 x 10mm,10mm and a nitrogen blanket gas feed to ensure that the waste resin is not carbonized in the line by the high temperature in the melting furnace.
In some embodiments, the material of the resin feed line 1 and the salt feed line 7 is Inconel 625.
The multi-path uniform feeding device is fastened through the flange plate 6, and in some specific embodiments, a path of cooling circulating water pipeline is further designed inside the flange plate 6, and comprises a flange cooling pipeline embedded in the flange plate 6, and a flange cooling water inlet 13 and a flange cooling water outlet 18 which are arranged on the flange plate 6 as shown in fig. 4. A sealing plate 8 with the outer edge in sealing contact with the melting furnace 14 is arranged at the bottom of the flange plate 6. On the one hand, the temperature of the flange plate 6 can be effectively reduced through the structure, so that the temperature is controlled below 60 ℃, and on the other hand, the high temperature in the melting furnace 14 can be prevented from being dissipated.
In some embodiments, the flange 6 is further provided with a thermometer 11, preferably a high temperature resistant thermometer, extending into the melting furnace 14, and the bottom end is immersed in the molten salt bath for real-time monitoring of the temperature of the molten salt bath.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present utility model. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.
Claims (10)
1. The multi-path uniform feeding device is arranged on a melting furnace (14) and is characterized by comprising a flange (6) arranged on the melting furnace (14) in a sealing manner, a resin feeding pipeline (1) penetrating through the flange (6) and extending into the melting furnace (14) from the bottom end, a feeding branch pipe (9) arranged at the bottom end of the resin feeding pipeline (1), a plurality of discharging holes (10) arranged on the feeding branch pipe (9), an air inlet (5) communicated with the resin feeding pipeline (1) and a salt feeding pipeline (7) arranged on the flange (6) and communicated with the melting furnace (14); along the discharging direction, the opening areas of the plurality of discharging holes (10) are sequentially increased.
2. A multi-path uniform feeding device according to claim 1, characterised in that said feeding branch (9) extends in the radial direction of the resin feeding line (1).
3. The multi-path uniform feeding device according to claim 1, wherein a plurality of feeding branch pipes (9) are arranged at the bottom end of the resin feeding pipeline (1) in a radial manner.
4. The multi-path uniform feeding device according to claim 1, wherein 6-10 feeding branch pipes (9) are arranged at the bottom end of the resin feeding pipeline (1).
5. A multi-path uniform feeding device according to claim 1, characterised in that a plurality of discharge holes (10) are distributed on the upper side and the outer end of the feeding branch pipe (9).
6. The multi-path uniform feeding device according to claim 1, wherein the resin feeding pipeline (1) is further sleeved with a cooling jacket (4), and the cooling jacket (4) is provided with a jacket cooling water inlet (2) and a jacket cooling water outlet (3).
7. The multi-path uniform feeding device according to claim 1, wherein the flange plate (6) is embedded with a flange cooling pipeline, and the flange plate (6) is provided with a flange cooling water inlet and a flange cooling water outlet.
8. A multi-path uniform feeding device according to claim 1, wherein the bottom of the flange plate (6) is provided with a sealing plate (8) with the outer edge in sealing contact with the melting furnace (14).
9. A multi-path uniform feeding device according to claim 1, wherein the flange (6) is provided with an exhaust port (12) in a penetrating manner.
10. A multi-path uniform feeding device according to claim 1, characterised in that the flange (6) is further provided with a thermometer (11) extending into the melting furnace (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320394839.2U CN219958560U (en) | 2023-03-06 | 2023-03-06 | Multipath uniform feeding device for treating radioactive waste resin in molten salt bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320394839.2U CN219958560U (en) | 2023-03-06 | 2023-03-06 | Multipath uniform feeding device for treating radioactive waste resin in molten salt bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219958560U true CN219958560U (en) | 2023-11-03 |
Family
ID=88536919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320394839.2U Active CN219958560U (en) | 2023-03-06 | 2023-03-06 | Multipath uniform feeding device for treating radioactive waste resin in molten salt bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219958560U (en) |
-
2023
- 2023-03-06 CN CN202320394839.2U patent/CN219958560U/en active Active
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