CN111167162A - Easy-to-maintain mixer-settler used in hot room - Google Patents
Easy-to-maintain mixer-settler used in hot room Download PDFInfo
- Publication number
- CN111167162A CN111167162A CN202010022094.8A CN202010022094A CN111167162A CN 111167162 A CN111167162 A CN 111167162A CN 202010022094 A CN202010022094 A CN 202010022094A CN 111167162 A CN111167162 A CN 111167162A
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- China
- Prior art keywords
- mixer
- settler
- extraction tank
- chamber
- mixing chamber
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0426—Counter-current multistage extraction towers in a vertical or sloping position
- B01D11/0434—Counter-current multistage extraction towers in a vertical or sloping position comprising rotating mechanisms, e.g. mixers, rotational oscillating motion, mixing pumps
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/42—Reprocessing of irradiated fuel
- G21C19/44—Reprocessing of irradiated fuel of irradiated solid fuel
- G21C19/46—Aqueous processes, e.g. by using organic extraction means, including the regeneration of these means
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention belongs to the technical field of nuclear fuel post-treatment, and particularly relates to a mixer-settler which is used in a hot chamber and easy to maintain. The extraction tank is divided into a first-stage extraction tank to an Nth-stage extraction tank from the upstream to the downstream according to the flow direction of the organic phase, and each extraction tank comprises a clarification chamber and a mixing chamber which are connected through a mixing phase port; the bottom of the clarifying chamber is provided with a heavy phase outlet; the bottom of the mixing chamber is provided with a heavy phase inlet, and the inside of the mixing chamber is provided with a stirring paddle; the clarifying chamber of the extraction tank and the mixing chamber of the adjacent extraction tank are close to each other; the clarifying chamber of the upstream extraction tank is connected with the mixing chamber of the adjacent downstream extraction tank through a light phase port; the heavy phase inlet of the mixing chamber of the upstream extraction cell is connected to the heavy phase outlet of the clarification chamber of the adjacent downstream extraction cell via a heavy phase pipe.
Description
Technical Field
The invention belongs to the technical field of nuclear fuel post-treatment, and particularly relates to a mixer-settler which is used in a hot chamber and easy to maintain.
Background
In the nuclear fuel post-treatment process, the main purpose is to separate the target component from the dissolved solution and purify the target component by liquid-liquid extraction separation process experiments or large-scale production of more strong radioactive substances to obtain qualified target products. At present, in the engineering field, extraction equipment widely applied comprises a mixer-settler, an air pulse extraction column and a centrifugal extractor.
Under certain operating conditions, it is necessary to select appropriate extraction equipment to meet production requirements, which requires consideration of various aspects of equipment such as processing capacity, mass transfer efficiency, and operating stability. These experiments or production are typically conducted in hot rooms, and extraction equipment is installed, operated and removed remotely by cranes and robots. However, the existing mixer-settler has poor radiation resistance, short service life and difficult maintenance and overhaul, and is not suitable for related operations in a hot room.
Disclosure of Invention
The invention aims to provide a mixer settler extraction separation bench device which is convenient for remote operation and maintenance in a hot chamber through a mechanical arm and a crane.
In order to achieve the above purposes, the invention adopts the technical scheme that the easy-maintenance mixer-settler used in a hot chamber is used for extracting a water phase and an organic phase in the hot chamber provided with a manipulator, wherein the mixer-settler comprises a plurality of single-stage extraction tanks connected in parallel, the extraction tanks are divided into a first-stage extraction tank to an Nth-stage extraction tank from the upstream to the downstream of the flow direction of the organic phase, and each extraction tank comprises a clarification chamber and a mixing chamber which are connected through a mixing phase port; the bottom of the clarifying chamber is provided with a heavy phase outlet; the bottom of the mixing chamber is provided with a heavy phase inlet, and the inside of the mixing chamber is provided with a stirring paddle; the clarifying chamber of the extraction tank and the mixing chamber of the adjacent extraction tank are close to each other; the clarifying chamber of the extraction tank positioned at the upstream is connected with the mixing chamber of the adjacent extraction tank positioned at the downstream through a light port; the heavy phase inlet of the mixing chamber of the upstream extraction tank is connected to the heavy phase outlet of the clarification chamber of the adjacent downstream extraction tank by a heavy phase pipe.
Further, the mixer-settler adopts a gravity leg heavy phase weir to adjust and control the interface height of the liquid in the mixer-settler; the heavy phase weir is arranged on the first-stage extraction tank and comprises a limit groove with the height controlled by a threaded rod; the height of the limiting groove can be adjusted by rotating the threaded rod through the manipulator, and the static pressure of the liquid column is changed, so that the interface position of liquid in the mixer-settler can be remotely adjusted.
Further, the mixed phase port is a vertical hole type; the light phase port is in an overflow weir type.
Further, every the stirring rake is driven by a motor and corresponding gear box, the power module of motor adopts the plug design, the stirring rake with the motor with the gear box adopts the design of integral type quick change, can cross and pass through manipulator and quick change equipment are in long-range the change in the hot chamber.
Further, the cover plate is arranged on the upper surface of the mixing and clarifying tank, the cover plate is hermetically connected with the tank body of the mixing and clarifying tank, and radioactive substances in the mixing and clarifying tank cannot escape from the tank body.
Further, the mixer-settler adopts the capacitance principle to detect the liquid interface in the mixer-settler.
Furthermore, the material of the extraction tank is 316L or 304 stainless steel.
Further, the number of the extraction tanks can be adjusted as needed.
Further, the stirring paddle is a four-blade flat paddle.
The invention has the beneficial effects that:
1. the mixer-settler is of a multi-stage structure and can be adjusted according to the process requirements, so that the quick replacement of the motor and the gear box of the stirring device and the quick connection of a circuit are realized, and the mixer-settler is easy to maintain. And a four-blade flat paddle mechanical stirring mode is selected, so that the controllability is good.
2. The interface height in the mixer-settler is regulated and controlled by adopting a gravity leg heavy phase weir. The height of the limiting groove is adjusted by rotating the threaded rod through the manipulator, and the static pressure of the liquid column is changed, so that the phase interface position in the mixer-settler is adjusted, the remote operation is realized, and the adjustment is convenient and reliable.
3. The interface of the mixer-settler is detected by adopting the capacitance principle, the sensitivity is high, and the mixer-settler is suitable for detecting small liquid level.
4. The mixing phase port adopts a vertical hole type mixing phase port, has strong adaptability and simultaneously has less strict requirements on the installation position of the stirring paddle.
5. The extraction tank is made of corrosion-resistant and irradiation-resistant materials such as 316L or 304 stainless steel, the requirements of operating environment with strong radioactivity and strong corrosivity in the hot chamber are met, and the mixer-settler is suitable for being used in the hot chamber and can be operated remotely.
6. The cover plate and the tank body of the mixing and clarifying tank are sealed, and radioactive substances cannot escape from the tank body.
7. The stirring paddle, the motor and the gear box are designed in an integrated quick-change mode, and the hot chamber is convenient to replace.
8. The replacement of equipment parts, instruments, electrical devices and the like in a sealed area can be operated remotely, and the quick replacement of each important outsourcing part is realized.
Drawings
FIG. 1 is a top plan view of a readily serviceable mixer-settler for use in a hot-box (shown with a 6-stage extraction tank, by way of example only) according to an embodiment of the present invention;
FIG. 2 is a side view of two adjacent extraction cells of a serviceable mixer-settler for use in a hot box according to an embodiment of the invention (arrows in the figure indicate the direction of flow of the heavy phase);
fig. 3 is a schematic view of a quick-change device of a stirring device according to an embodiment of the invention;
FIG. 4 is a view in the direction A of FIG. 3;
in the figure: 1-a first-stage extraction tank, 2-a second-stage extraction tank, 3-a third-stage extraction tank, 4-a fourth-stage extraction tank, 5-a fifth-stage extraction tank, 6-a sixth-stage extraction tank, 7-a clarification chamber, 8-a mixing chamber, 9-a light phase port, 10-a mixed phase port, 11-a heavy phase inlet, 12-a stirring paddle, 13-a threaded rod, 14-a limiting groove, 15-a heavy phase pipe, 16-a heavy phase outlet and 17-a motor.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 and fig. 2, the invention provides a maintenance-easy mixer-settler used in a hot chamber, which is used for extracting a water phase and an organic phase in the hot chamber provided with a manipulator, and comprises a mixer-settler formed by connecting a plurality of unipolar extraction tanks in parallel, wherein the extraction tanks are divided into a first-stage extraction tank 1 to an Nth-stage extraction tank from upstream to downstream according to the flow direction of the organic phase, and each extraction tank comprises a clarification chamber 7 and a mixing chamber 8 which are connected through a mixing port 10; the bottom of the clarifying chamber 7 is provided with a heavy phase outlet 16; the bottom of the mixing chamber 8 is provided with a heavy phase inlet 11, and the inside of the mixing chamber is provided with a stirring paddle 12; the clarifying chamber 7 of the extraction tank and the mixing chamber 8 of the adjacent extraction tank are close to each other; the clarifying chamber 7 of the upstream extraction tank is connected with the mixing chamber 8 of the adjacent downstream extraction tank through a light phase port 9; the heavy phase inlet 11 of the mixing chamber 8 of the upstream extraction cell is connected to the heavy phase outlet 16 of the fining chamber 7 of the adjacent downstream extraction cell by a heavy phase pipe 15 (i.e. the heavy phase inlet 11 is of the communicating pipe type).
The mixer-settler adopts a gravity leg heavy phase weir to adjust and control the interface height of the liquid in the mixer-settler; the heavy phase weir is arranged on the first-stage extraction tank 1 and comprises a limit groove 14 with the height controlled by a threaded rod 13; can adjust the spacing groove 14 height through manipulator rotation threaded rod 13, change the liquid column static pressure to realize the interface position of the liquid in the remote regulation mixer-settler, adjust convenient, reliable.
The mixed phase port 10 is a vertical hole type, has strong adaptability and simultaneously has less strict requirements on the installation position of the stirring paddle 12; the light phase port 9 is in an overflow weir type.
Each stirring paddle 12 is driven by a motor 17 and a corresponding gear box, a power module of the motor 17 adopts a plug-in design, and the stirring paddles 12, the motor 17 and the gear boxes adopt an integrated quick-change design and can be remotely replaced in a hot chamber through a manipulator and a quick-change device (see fig. 3 and 4). The stirring paddle 12 is a four-blade flat paddle.
The cover plate is arranged on the upper surface of the mixer-settler and is hermetically connected with the cell body of the mixer-settler, and radioactive substances in the mixer-settler cannot escape from the cell body.
The mixer-settler adopts the capacitance principle to detect the liquid interface in the mixer-settler, has high sensitivity and is suitable for detecting small liquid level.
The material of the extraction tank is corrosion-resistant and irradiation-resistant materials such as 316L or 304 stainless steel, and the like, so that the operating environment requirements of strong radioactivity and strong corrosivity in the hot chamber are met.
The number of extraction tanks can be adjusted as desired.
The organic phase and the water phase are mixed and contacted under the action of a stirring paddle 12 of the mixing chamber 8 to complete material exchange; after the two phases are mixed in the mixing chamber 8, the two phases are thrown out through the mixing phase port 10 under the action of centrifugal force of the stirring paddle 12, enter the clarifying chamber 7, are clarified and split in the clarifying chamber 7, the water phase is heavier at the lower layer, and the organic phase is lighter at the upper layer.
The flow direction of the liquid flow in the mixer-settler is illustrated by taking the second-stage extraction tank 2 as an example:
the organic phase of the first-stage extraction tank 1 floats on the upper layer of the clarification chamber of the first-stage extraction tank 1 after being clarified, and flows into the mixing chamber of the second-stage extraction tank 2 through a light phase port of the first-stage extraction tank 1;
the water phase of the third-stage extraction tank 3 is settled in the lower layer of the settling chamber of the third-stage extraction tank 3 after being settled, and the suction force formed by the stirring paddle of the second-stage extraction tank 2 enters the mixing chamber of the second-stage extraction tank 2 through a heavy phase pipe (between the settling chamber of the third-stage extraction tank 3 and the mixing chamber of the second-stage extraction tank 2);
the organic phase and the water phase are mixed in the mixing chamber of the second-stage extraction tank 2, enter the clarifying chamber 7 of the second-stage extraction tank 2 for clarification and phase splitting, the organic phase enters the mixing chamber of the third-stage extraction tank 3 through the light phase port of the clarifying chamber of the second-stage extraction tank 2, and the water phase enters the mixing chamber of the first-stage extraction tank 1 through the heavy phase pipe (between the clarifying chamber of the second-stage extraction tank 2 and the mixing chamber of the first-stage extraction tank 1).
Examples
Example 1
An extraction experiment of the feed liquid containing the neptunium (Np) is carried out by utilizing a mixer-settler (the material of the extraction tank is 316L stainless steel) of the 16-stage extraction tank provided by the invention.
Preparing a certain amount of feed liquid containing Np and HNO3Concentration 1-3mol/L, Np (VI) concentration 1-5g/L, 10 grade extraction, 6 grade washing. Under certain technological conditions, the mixed clarifying tank can extract the neptunium into an organic phase, the yield of the neptunium is more than 99.99 percent, and the process requirement is met.
Example 2
The plutonium (Pu) -containing feed liquid extraction experiment was carried out by using a mixer settler (the material of the extraction tank was 304 stainless steel) of the 16-stage extraction tank provided by the present invention.
Preparing a certain amount of feed liquid containing Pu and HNO3Concentration of 1-3mol/L, Pu (IV) is 0.5-1.5g/L, 10 grades of extraction and 6 grades of washing. Under certain process conditions, the mixer settler can extract plutonium into an organic phase, the yield of the plutonium is more than 99.99 percent, and the process requirements are met.
The device according to the present invention is not limited to the embodiments described in the specific embodiments, and those skilled in the art can derive other embodiments according to the technical solutions of the present invention, and also belong to the technical innovation scope of the present invention.
Claims (9)
1. An easy-to-maintain mixer-settler used in a hot cell for extracting aqueous and organic phases in a hot cell equipped with a robot, characterized in that: the device comprises a mixer-settler consisting of a plurality of single-stage extraction tanks connected in parallel, wherein the extraction tanks are divided into a first-stage extraction tank (1) to an Nth-stage extraction tank from upstream to downstream according to the flow direction of the organic phase, and each extraction tank comprises a clarification chamber (7) and a mixing chamber (8) which are connected through a mixing port (10); a heavy phase outlet (16) is arranged at the bottom of the clarifying chamber (7); the bottom of the mixing chamber (8) is provided with a heavy phase inlet (11), and the inside of the mixing chamber is provided with a stirring paddle (12); the clarifying chamber (7) of the extraction tank and the mixing chamber (8) of the adjacent extraction tank are close to each other; the clarification chamber (7) of the extraction tank located upstream is connected with the mixing chamber (8) of the adjacent extraction tank located downstream through a light phase port (9); the heavy phase inlet (11) of the mixing chamber (8) of the upstream extraction cell is connected to the heavy phase outlet (16) of the clarification chamber (7) of the adjacent downstream extraction cell via a heavy phase pipe (15).
2. A mixer-settler according to claim 1, characterized in that: the mixer-settler adopts a gravity leg heavy phase weir to adjust and control the interface height of the liquid in the mixer-settler; the heavy phase weir is arranged on the first-stage extraction tank (1) and comprises a limit groove (14) with the height controlled by a threaded rod (13); the height of the limit groove (14) can be adjusted by rotating the threaded rod (13) through the manipulator, and the static pressure of the liquid column is changed, so that the interface position of the liquid in the mixer-settler can be remotely adjusted.
3. A mixer-settler according to claim 1, characterized in that: the mixed phase port (10) is a vertical hole type; the light phase port (9) is in an overflow weir type.
4. A mixer-settler according to claim 1, characterized in that: every stirring rake (12) are driven by a motor (17) and corresponding gear box, the power module of motor (17) adopts the plug design, stirring rake (12) with motor (17) with the gear box adopts the design of integral type quick change, can cross through manipulator and quick change equipment are in long-range the change in the hot chamber.
5. A mixer-settler according to claim 1, characterized in that: the cover plate is arranged on the upper surface of the mixer-settler and is hermetically connected with the cell body of the mixer-settler, and radioactive substances in the mixer-settler cannot escape from the cell body.
6. A mixer-settler according to claim 1, characterized in that: the mixer-settler adopts the capacitance principle to detect the liquid interface in the mixer-settler.
7. A mixer-settler according to claim 1, characterized in that: the material of the extraction tank is 316L or 304 stainless steel.
8. A mixer-settler according to claim 1, characterized in that: the number of extraction tanks can be adjusted as required.
9. A mixer-settler according to claim 1, characterized in that: the stirring paddle (12) is a four-blade flat paddle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022094.8A CN111167162A (en) | 2020-01-09 | 2020-01-09 | Easy-to-maintain mixer-settler used in hot room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010022094.8A CN111167162A (en) | 2020-01-09 | 2020-01-09 | Easy-to-maintain mixer-settler used in hot room |
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| Publication Number | Publication Date |
|---|---|
| CN111167162A true CN111167162A (en) | 2020-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010022094.8A Pending CN111167162A (en) | 2020-01-09 | 2020-01-09 | Easy-to-maintain mixer-settler used in hot room |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3714324A (en) * | 1968-06-18 | 1973-01-30 | Gen Electric | Irradiated fuel recovery system |
| CN2464414Y (en) * | 2001-01-18 | 2001-12-12 | 核工业第四研究设计院 | Miniature extractor |
| CN201668978U (en) * | 2010-05-17 | 2010-12-15 | 长沙有色冶金设计研究院 | Level-six countercurrent extractor |
| CN206052108U (en) * | 2016-08-26 | 2017-03-29 | 陕西华源矿业有限责任公司 | A kind of extract return method device and the extraction box with extract return method device |
| CN109273128A (en) * | 2018-10-17 | 2019-01-25 | 中国核电工程有限公司 | A kind of big stream of novel nuclear fuel post-processing compares mixer-settler |
| CN209210891U (en) * | 2018-12-04 | 2019-08-06 | 郴州金铖环保科技有限公司 | Extraction tank |
| CN110434797A (en) * | 2019-09-03 | 2019-11-12 | 中国电子科技集团公司第十二研究所 | A kind of component quick change part and the quick change component including it |
| CN209816228U (en) * | 2018-12-28 | 2019-12-20 | 中核沽源铀业有限责任公司 | EC-D type extraction tank for uranium hydrometallurgy |
-
2020
- 2020-01-09 CN CN202010022094.8A patent/CN111167162A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3714324A (en) * | 1968-06-18 | 1973-01-30 | Gen Electric | Irradiated fuel recovery system |
| CN2464414Y (en) * | 2001-01-18 | 2001-12-12 | 核工业第四研究设计院 | Miniature extractor |
| CN201668978U (en) * | 2010-05-17 | 2010-12-15 | 长沙有色冶金设计研究院 | Level-six countercurrent extractor |
| CN206052108U (en) * | 2016-08-26 | 2017-03-29 | 陕西华源矿业有限责任公司 | A kind of extract return method device and the extraction box with extract return method device |
| CN109273128A (en) * | 2018-10-17 | 2019-01-25 | 中国核电工程有限公司 | A kind of big stream of novel nuclear fuel post-processing compares mixer-settler |
| CN209210891U (en) * | 2018-12-04 | 2019-08-06 | 郴州金铖环保科技有限公司 | Extraction tank |
| CN209816228U (en) * | 2018-12-28 | 2019-12-20 | 中核沽源铀业有限责任公司 | EC-D type extraction tank for uranium hydrometallurgy |
| CN110434797A (en) * | 2019-09-03 | 2019-11-12 | 中国电子科技集团公司第十二研究所 | A kind of component quick change part and the quick change component including it |
Non-Patent Citations (3)
| Title |
|---|
| J.T. 朗著: "《核燃料后处理工程》", 31 December 1980, 原子能出版社 * |
| 吴宜灿: "《聚变中子学》", 31 December 2016, 中国原子能出版社 * |
| 汪家鼎等: "《溶剂萃取手册》", 31 January 2001, 化学工业出版社 * |
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Application publication date: 20200519 |
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| RJ01 | Rejection of invention patent application after publication |