CN112216417A - Feeding area structure of rotary calcining furnace for treating radioactive waste liquid - Google Patents
Feeding area structure of rotary calcining furnace for treating radioactive waste liquid Download PDFInfo
- Publication number
- CN112216417A CN112216417A CN202011094894.7A CN202011094894A CN112216417A CN 112216417 A CN112216417 A CN 112216417A CN 202011094894 A CN202011094894 A CN 202011094894A CN 112216417 A CN112216417 A CN 112216417A
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- flow channel
- waste liquid
- feeding
- pipe
- treatment
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- 239000007788 liquid Substances 0.000 title claims abstract description 68
- 239000002901 radioactive waste Substances 0.000 title claims abstract description 17
- 238000001354 calcination Methods 0.000 title claims description 23
- 239000002699 waste material Substances 0.000 claims abstract description 25
- 238000005192 partition Methods 0.000 claims abstract description 10
- 230000002285 radioactive effect Effects 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 8
- 238000007789 sealing Methods 0.000 abstract description 8
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 18
- 239000011521 glass Substances 0.000 description 13
- 239000002927 high level radioactive waste Substances 0.000 description 4
- 239000003758 nuclear fuel Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000010808 liquid waste Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- G21F9/14—Processing by incineration; by calcination, e.g. desiccation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Environmental & Geological Engineering (AREA)
- Gasification And Melting Of Waste (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention provides a rotary calciner feeding zone structure for treating radioactive waste liquid. The feeding area structure comprises a feeding pipe, a waste liquid feeding port and a tail gas exhaust pipe; the feeding pipe is divided into an upper part and a lower part by a partition plate, and the partition plate is provided with vent holes to form an air flow channel of the upper half part and a liquid flow channel of the lower half part; the waste liquid feeding hole is communicated with the liquid flow channel, and the tail gas exhaust pipe is communicated with the gas flow channel through an inclined pipe section; the bottom of the liquid flow channel is provided with a calciner feed port. The invention adopts a brand new autonomous design, has the advantages of simple and compact structural design, space saving, light structural weight, convenient long-term stable operation of the process and the like, effectively realizes the gas-liquid separation of waste liquid feeding, avoids the problem that condensate seeps from a driven sealing area, and realizes good sealing.
Description
Technical Field
The invention belongs to the field of radioactive waste liquid treatment, and particularly relates to a feeding area structure of a rotary calcining furnace for treating radioactive waste liquid.
Background
A relatively complete industrial system is basically established in the front stage of the nuclear fuel cycle in China, but the rear stage (including high level waste treatment and disposal and the like) of the nuclear fuel cycle is in the research, development and design stage, and the autonomous industrial production capacity cannot be formed up to now. The glass curing technology is a link with great technical difficulty in closed circulation of nuclear fuel, and covers the professions and disciplines of nuclear chemical industry, radiochemistry, high-temperature chemistry, silicate material science, electromagnetism, mechanical design and manufacture, automatic control and the like, and in addition, the glass curing technology relates to strong radioactivity and high-temperature operation, has high requirements on materials and equipment, and has far higher requirements on the reliability, stability and safety of the equipment than the requirements of common industry, so that the glass curing technology puts high requirements on the research and development/design of the process/equipment. Because the prior art has insufficient reserves, the glass curing technology becomes a weak link in the nuclear fuel cycle in China.
At present, the glass curing technology is adopted in the high level radioactive liquid waste treatment technical route determined by China. The two-step cold crucible glass curing technology has the advantages that the treatment temperature is high, the service life of a smelting furnace is long, the two-step cold crucible glass curing technology is suitable for long-term continuous operation and the like, so that the two-step cold crucible glass curing technology is determined as the development direction of the high-level radioactive waste liquid glass curing technology in future in China and is listed as one of ten bottleneck technologies in the nuclear industry, and the technology is also used as one of alternative technologies for high-level radioactive waste liquid glass curing treatment in spent fuel post-treatment commercial factories in China.
The rotary calciner is used as a first-step treatment device of a two-step glass solidification technology, has the advantages of simple operation, high treatment capacity and the like, can remove moisture and most nitrate radicals in waste liquid through evaporation and calcination process processes, further converts the water and most nitrate radicals into solid particles, and then enters the glass furnace for treatment, thereby effectively solving the problems of air pressure fluctuation in the subsequent glass furnace, obviously prolonged melting time and the like. At present, a rotary calciner is used as a core device of a second generation glass solidification technology (a two-step method of the rotary calciner and a hot crucible) and a fourth generation glass solidification technology (a two-step method of the rotary calciner and a cold crucible), and industrial-scale high-level waste liquid treatment is realized in France, England and other countries.
However, the design of the feeding zone structure of the rotary calciner is not disclosed in detail in the existing documents at home and abroad, so that the corresponding feeding zone structure of the rotary calciner needs to be developed if the technology of the rotary calciner is independent.
Disclosure of Invention
The invention provides a feeding area structure of a rotary calcining furnace for treating radioactive waste liquid, which aims to solve the problems that the technology of the rotary calcining furnace for the radioactive waste liquid in China is incomplete, immature and the like and realize the autonomy of the technology of the rotary calcining furnace for the radioactive waste liquid.
The rotary calcining furnace feeding area structure for treating radioactive waste liquid comprises a feeding pipe, a waste liquid feeding hole and a tail gas exhaust pipe; the feeding pipe is a pipe body with two sealed ends, the feeding pipe is divided into an upper part and a lower part by a partition plate, and the partition plate is provided with vent holes to form an air flow channel of the upper half part and a liquid flow channel of the lower half part; the waste liquid feeding hole and the tail gas exhaust pipe are positioned at the same end of the feeding pipe, the waste liquid feeding hole is communicated with the liquid flow channel, and the tail gas exhaust pipe is communicated with the gas flow channel through an inclined pipe section; one end of the inclined pipe section, which is communicated with the tail gas exhaust pipe, is higher than one end of the inclined pipe section, which is communicated with the liquid flow channel; the bottom of the liquid flow channel is provided with a calciner feed port.
According to one embodiment, the ratio of the cross-sectional area of the gas flow channel to the cross-sectional area of the liquid flow channel is 1: 1-2: 1.
According to one embodiment, the waste liquid feed inlet is a quick connection.
According to one embodiment, the calciner feedwell may be of a porous structure.
Further, the pore diameter of the porous structure is 2-5 mm.
Furthermore, each trompil of porous structure is the matrix and distributes, and arbitrary adjacent hole centre-to-centre spacing is 4 ~ 6 mm.
According to one embodiment, the angle of inclination of the inclined tube section is between 10 ° and 45 °.
The feeding area structure of the rotary calcining furnace for treating the radioactive waste liquid adopts a brand-new autonomous design, and has the advantages of simple structural design, space saving, convenience for long-term stable operation of the process and the like. The gas-liquid separation type feeding pipe structure effectively realizes gas-liquid separation of waste liquid feeding, and is matched with the tail gas exhaust pipe with the inclined pipe section, so that smooth backflow of tail gas condensate is realized, and adverse consequences caused by liquid carried in tail gas are effectively avoided. Meanwhile, the feeding area structure can be arranged in the dynamic sealing area of the rotary calcining furnace and penetrates through the dynamic sealing structure through the structural design, and the tail gas is smoothly separated and discharged out of the rotary calcining furnace through the gas-liquid separation design and the tail gas exhaust pipe with the inclined pipe section, so that the problem that the generated condensate is leaked out of the dynamic sealing area due to the fact that the gas is cooled after leaving the heating area in the rotary calcining furnace is effectively solved, and good sealing is achieved. In addition, the structural design of the invention does not adopt a feeding bin structure which is commonly used by liquid treatment equipment, but directly replaces the structure with a waste liquid feeding port, a feeding pipe, a tail gas exhaust pipe and the like, thereby greatly reducing the structural weight, avoiding the condition that tail gas condensate is accumulated in the feeding bin, and enabling the structure of the whole rotary calcining furnace to be more compact.
Drawings
FIG. 1 is a schematic diagram of a rotary calciner feed zone configuration for the treatment of radioactive spent liquor according to an embodiment of the invention.
FIG. 2 is a schematic diagram of the operation of a rotary calciner feed zone configuration for the treatment of radioactive spent liquor according to an embodiment of the invention.
Reference numerals: 1. the device comprises a feeding pipe, 2 a waste liquid feeding hole, 3 a tail gas discharging pipe, 4 a partition plate, 5 a vent hole, 6 an airflow channel, 7 a liquid flow channel, 8 an inclined pipe section, 9 a feeding hole of a calcining furnace, 10 a furnace tube of a rotary calcining furnace and 11 a dynamic sealing structure.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings. In the specification, the same or similar reference numerals denote the same or similar components.
In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of embodiments of the invention and should not be construed as limiting the invention. The various components in the drawings are not to scale in order to clearly illustrate the details of the various components, and so the proportions of the various components in the drawings should not be taken as limiting.
The feeding area structure of the rotary calcining furnace for treating radioactive waste liquid comprises a feeding pipe 1, a waste liquid feeding hole 2 and a tail gas exhaust pipe 3; the feeding pipe 1 is a pipe body with two sealed ends, the feeding pipe 1 is divided into an upper part and a lower part by a partition plate 4, and the partition plate 4 is provided with a vent hole 5 which forms an upper half part of an airflow channel 6 and a lower half part of a liquid flow channel 7; the waste liquid feeding hole 2 and the tail gas exhaust pipe 3 are positioned at the same end of the feeding pipe 1, the waste liquid feeding hole 2 is communicated with the liquid flow channel 7, and the tail gas exhaust pipe 3 is communicated with the gas flow channel 6 through an inclined pipe section 8; one end of the inclined pipe section 8 communicated with the tail gas exhaust pipe 3 is higher than one end communicated with the liquid flow channel 7; the bottom of the flow channel 7 has a calciner feed 9.
According to an example, the cross-sectional area ratio of the air flow channel 6 to the liquid flow channel 7 is 1: 1-2: 1, so that the flow distribution of the air flow and the liquid flow is facilitated.
According to an example, the waste liquid feed inlet 2 is a quick connector, facilitating quick connection.
According to one example, the calciner feed 9 may be of a porous structure to disperse the spent liquor into small droplets to enhance the calcination of the spent liquor in the furnace.
Furthermore, the aperture of the porous structure is 2-5mm, so that a good waste liquid dispersion effect is obtained.
Further, each trompil of porous structure is the matrix and distributes, and arbitrary adjacent hole centre-to-centre spacing is 4 ~ 6mm to obtain better waste liquid dispersion effect.
According to an example, the inclination angle of the inclined pipe section 8 is 10-45 degrees, so that smooth backflow of the exhaust condensate is facilitated.
Example 1
The rotary calciner designed by adopting the structure of the feed zone of the rotary calciner disclosed by the invention is used for carrying out evaporation/calcination treatment on radioactive waste liquid, and the structure of the feed zone is set as follows: the cross-sectional area ratio of the air flow channel 6 to the liquid flow channel 7 is 1:1, the feeding port 9 of the calcining furnace can adopt a porous structure, the aperture is 4mm, the center distance between any adjacent holes is 5mm, the inclination angle of the inclined pipe section 8 is 35 degrees, and the specific treatment steps are as follows:
and starting the rotary calciner, feeding the waste liquid into the feeding pipe 1 through the waste liquid feeding port 2, feeding the waste liquid into the rotary calciner furnace tube 10 through the liquid flow channel 7 and the calciner feeding port 9, and evaporating/calcining the waste liquid in the rotary calciner furnace tube 10. The generated tail gas is discharged out of the rotary calciner to a tail gas treatment system through the structures such as the calciner feed port 9, the vent holes 5 on the partition plate 4, the airflow channel 6, the inclined pipe section 8, the tail gas exhaust pipe 3 and the like.
The above treatment process shows that: by adopting the structural design of the feeding area of the rotary calcining furnace, the operations of radioactive waste liquid feeding, tail gas discharging and the like can be simpler, the running stability of the rotary calcining furnace is good, no condensate seeps out from a dynamic sealing area, and the long-term running can be realized.
Although a few embodiments in accordance with the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
Claims (7)
1. A rotary calciner feed zone structure for treating radioactive waste liquid is characterized in that the rotary calciner feed zone structure for treating the radioactive waste liquid comprises a feed pipe, a waste liquid feed inlet and a tail gas exhaust pipe; the feeding pipe is a pipe body with two sealed ends, the feeding pipe is divided into an upper part and a lower part by a partition plate, and the partition plate is provided with vent holes to form an air flow channel of the upper half part and a liquid flow channel of the lower half part; the waste liquid feeding hole and the tail gas exhaust pipe are positioned at the same end of the feeding pipe, the waste liquid feeding hole is communicated with the liquid flow channel, and the tail gas exhaust pipe is communicated with the gas flow channel through an inclined pipe section; one end of the inclined pipe section, which is communicated with the tail gas exhaust pipe, is higher than one end of the inclined pipe section, which is communicated with the liquid flow channel; the bottom of the liquid flow channel is provided with a calciner feed port.
2. The rotary calciner feed zone structure for the treatment of radioactive spent liquor according to claim 1 wherein: the cross-sectional area ratio of the air flow channel to the liquid flow channel is 1: 1-2: 1.
3. The rotary calciner feed zone structure for the treatment of radioactive spent liquor according to claim 1 wherein: the waste liquid feed inlet is a quick connector.
4. A rotary calciner feed zone configuration for the treatment of radioactive spent liquor according to claims 1-3 wherein: the feeding port of the calcining furnace adopts a porous structure.
5. The rotary calciner feed zone structure for the treatment of radioactive waste liquor according to claim 4, characterized in that: the pore diameter of the porous structure is 2-5 mm.
6. The rotary calciner feed zone structure for the treatment of radioactive waste liquor according to claim 5, characterized in that: each trompil of porous structure is the matrix and distributes, and arbitrary adjacent hole centre-to-centre spacing is 4 ~ 6 mm.
7. The rotary calciner feed zone structure for the treatment of radioactive spent liquor according to claims 1-3, 5-6 wherein: the inclination angle of the inclined pipe section is 10-45 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094894.7A CN112216417B (en) | 2020-10-14 | 2020-10-14 | Rotary calciner feeding zone structure for treating radioactive waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011094894.7A CN112216417B (en) | 2020-10-14 | 2020-10-14 | Rotary calciner feeding zone structure for treating radioactive waste liquid |
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| Publication Number | Publication Date |
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| CN112216417A true CN112216417A (en) | 2021-01-12 |
| CN112216417B CN112216417B (en) | 2023-10-24 |
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| CN202011094894.7A Active CN112216417B (en) | 2020-10-14 | 2020-10-14 | Rotary calciner feeding zone structure for treating radioactive waste liquid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447614A (en) * | 2021-06-21 | 2021-09-28 | 中国原子能科学研究院 | Method for measuring denitration rate in radioactive waste liquid calcination process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5906483A (en) * | 1998-05-01 | 1999-05-25 | Harper International Corp. | Rotary film calciner |
| US20040022697A1 (en) * | 1997-09-09 | 2004-02-05 | Moskovskoe Gosudarstvennoe Predpriyatie- Obiedinenny Ekologo-Technologichesky I | Installation for vitrification of liquid radioactive wastes, cooled discharge unit and cooled induction melter for the installation |
| US20080214886A1 (en) * | 2006-09-14 | 2008-09-04 | Atomic Energy Of Canada Limited | Evaporator/calciner |
| JP2017062190A (en) * | 2015-09-25 | 2017-03-30 | 太平洋セメント株式会社 | Processing method and processing apparatus for radioactive cesium contaminated water |
| CN107622806A (en) * | 2017-09-22 | 2018-01-23 | 绵阳科大久创科技有限公司 | A kind of high activity liquid waste glass solidification system and its curing |
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-
2020
- 2020-10-14 CN CN202011094894.7A patent/CN112216417B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040022697A1 (en) * | 1997-09-09 | 2004-02-05 | Moskovskoe Gosudarstvennoe Predpriyatie- Obiedinenny Ekologo-Technologichesky I | Installation for vitrification of liquid radioactive wastes, cooled discharge unit and cooled induction melter for the installation |
| US5906483A (en) * | 1998-05-01 | 1999-05-25 | Harper International Corp. | Rotary film calciner |
| US20080214886A1 (en) * | 2006-09-14 | 2008-09-04 | Atomic Energy Of Canada Limited | Evaporator/calciner |
| JP2017062190A (en) * | 2015-09-25 | 2017-03-30 | 太平洋セメント株式会社 | Processing method and processing apparatus for radioactive cesium contaminated water |
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| 李扬: "冷坩埚处理高放废液***的进料设计", 《科技创新导报》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113447614A (en) * | 2021-06-21 | 2021-09-28 | 中国原子能科学研究院 | Method for measuring denitration rate in radioactive waste liquid calcination process |
| CN113447614B (en) * | 2021-06-21 | 2022-08-09 | 中国原子能科学研究院 | Method for measuring denitration rate in radioactive waste liquid calcination process |
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| CN112216417B (en) | 2023-10-24 |
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