CN111613349A - Micro-gas removal device and method based on fluid self-oscillation and micro-interface reinforcement - Google Patents
Micro-gas removal device and method based on fluid self-oscillation and micro-interface reinforcement Download PDFInfo
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- CN111613349A CN111613349A CN202010477560.1A CN202010477560A CN111613349A CN 111613349 A CN111613349 A CN 111613349A CN 202010477560 A CN202010477560 A CN 202010477560A CN 111613349 A CN111613349 A CN 111613349A
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Abstract
The invention provides a micro-gas removal device based on fluid self-oscillation and micro-interface reinforcement, which comprises a Venturi micro-bubble generation device, a fluid oscillator, a reaction kettle and a gas-liquid separation device, wherein the Venturi micro-bubble generation device is connected with the fluid oscillator; the bottom end of the gas-liquid separation device is provided with a tangential underflow port, the side surface of the gas-liquid separation device is provided with a tangential inlet, and the top end of the gas-liquid separation device is provided with an overflow pipe; the side surface of the reaction kettle is provided with a tangential outlet, and the top of the reaction kettle is provided with a gas-liquid mixture inlet; the bottom of the Venturi microbubble generation device is communicated with the molten salt loop, and the top of the Venturi microbubble generation device is connected with the bottom of the fluid oscillator; the top of the fluid oscillator is connected to the bottom end of the reaction kettle; a gas-liquid mixture inlet at the top end of the reaction kettle is communicated with the overflow pipe; a tangential inlet on the side surface of the gas-liquid separation device is connected with a tangential outlet of the reaction kettle; the tangential underflow port at the bottom end is communicated with the fused salt loop. The trace gas removal device can effectively remove fission gases such as krypton and xenon in a molten salt reactor molten salt loop, reduce neutron loss, reduce equipment maintenance cost and obviously improve the economic benefit of the molten salt reactor.
Description
Technical Field
The invention relates to the technical field of fission gas removal, in particular to a trace gas removal device and a trace gas removal method, and particularly relates to a trace gas removal device and a trace gas removal method based on fluid self-oscillation and micro-interface strengthening technologies.
Background
The thorium-based nucleus has the characteristics of good neutron multiplication performance, less high-level waste generation, rich reserves and the like; the molten salt reactor is one of the candidate reactors of the fourth-generation advanced reactor, and has the advantages and potentials of efficient thorium utilization, high-temperature hydrogen production, no water cooling, suitability for small-scale modular design and the like. However, during the molten salt reactor reaction process, a large amount of gas neutron poisons such as xenon, krypton and the like can be generated, so that the chain reaction of the molten salt reactor is hindered, and the pipeline equipment is greatly damaged. Since neutron poisons are sparingly soluble in fuel salts and exist as tiny bubbles, the united states proposes a mode in which bubbles are blown in first, fission gas is diffused into the bubbles, and then separation is performed. Aiming at the characteristics of small bubbles, high viscosity of a molten salt medium and the like in a molten salt reactor loop, a cyclone separation method is adopted internationally to remove neutron poison in mainstream.
The cyclone separation technology is a high-efficiency separation technology for realizing multi-phase separation by utilizing centrifugal force and two-phase density difference, has simple structure, compact volume, light weight and high separation efficiency, and gradually replaces the traditional gravity settling separation equipment at present. But the cyclone separation technology has the characteristics of rigorous separation conditions and certain requirements on the back pressure of the separator,
through the search of the prior art, in the article 'operating characteristics of cyclone-type gas-liquid separator under different back pressures' published in the journal 'nuclear technology' of Li Hua and the like, a cyclone-type gas-liquid separator suitable for a molten salt reactor degassing system is disclosed, the separation condition of the separator mainly needs to control the back pressure, and the robustness is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a trace gas removal device and a trace gas removal method based on fluid self-oscillation and micro-interface strengthening.
The purpose of the invention is realized by the following scheme:
the invention provides a micro gas removing device based on fluid self-oscillation and micro interface reinforcement, which comprises a Venturi micro bubble generating device, a fluid oscillator, a reaction kettle and a gas-liquid separating device; the bottom end of the gas-liquid separation device is provided with a tangential underflow port, the side surface of the gas-liquid separation device is provided with a tangential inlet, and the top end of the gas-liquid separation device is provided with an overflow pipe; a tangential outlet is formed in the side surface of the reaction kettle, and a gas-liquid mixture inlet is formed in the top of the reaction kettle; the bottom of the Venturi microbubble generation device is communicated with the molten salt loop, the top of the Venturi microbubble generation device is connected with the bottom of the fluid oscillator, and the middle of the Venturi microbubble generation device is also provided with a gas injection hole; the top of the fluid oscillator is connected to the bottom end of the reaction kettle; a gas-liquid mixture inlet at the top end of the reaction kettle is communicated with an overflow pipe at the top end of the gas-liquid separation device; a tangential inlet on the side surface of the gas-liquid separation device is connected with a tangential outlet on the side surface of the reaction kettle; and a tangential underflow port at the bottom end of the gas-liquid separation device is communicated with the molten salt loop.
Preferably, fluidic oscillator includes import convergent section, diffusion chamber, water conservancy diversion boss and export divergent section, venturi microbubble generating device's top with import convergent section is connected, import convergent section with the diffusion chamber links to each other, the water conservancy diversion boss is arranged in among the diffusion chamber, the diffusion chamber with export divergent section links to each other, export divergent section with reation kettle's bottom intercommunication.
Preferably, the reaction kettle comprises a gradually expanding section and a straight cylinder cavity from bottom to top, a tangential outlet is arranged on the side surface of the straight cylinder cavity, and a gas-liquid mixture inlet is arranged at the top of the straight cylinder cavity; the diverging section is in communication with an outlet diffuser section of the fluidic oscillator.
Preferably, the divergent section and the outlet divergent section have a divergent angle in accordance.
Preferably, the gas-liquid separation device is a centrifugal cylindrical gas-liquid separator, and comprises an overflow pipe with an inner diameter of D1, wherein the overflow pipe is arranged from top to bottom, the overflow pipe is L1, the large-diameter straight cylinder cavity with an inner diameter of D2, the tapered cavity with a length of L2 and the small-diameter straight cylinder cavity with a length of L3 and a diameter of D3, a tangential inlet with a tangential angle of alpha is arranged on the side surface of the large-diameter straight cylinder cavity, a tangential underflow port with an inner diameter of D4 is arranged on the side wall of the bottom end of the small-diameter straight cylinder cavity, a circular pipe section at one end of the overflow pipe is partially inserted into the large-diameter straight cylinder cavity, and the other end of the overflow pipe is connected with.
Preferably, the conical current stabilizer with the vertex angle of beta is arranged at the bottom in the small-diameter straight cylinder cavity.
Preferably, the vertex angle β of the conical flow stabilizer is 30 °.
Preferably, the inner diameter D1 of the overflow pipe is 40-50mm, the length L1 of the large-diameter straight cylinder cavity is 600mm, the inner diameter D2 is 96-150mm, the tangential angle alpha of the tangential inlet is 24-30 degrees, the length L2 of the tapered cavity is 300-675mm, the length L3 of the small-diameter straight cylinder cavity is 50-75mm, the inner diameter D3 is 64-100mm, and the inner diameter D4 of the tangential underflow opening is 40-50 mm.
The second aspect of the present invention provides a method for removing trace gas, which employs the above-mentioned trace gas removal device based on fluid self-oscillation and micro-interface enhancement, and specifically includes the following steps:
s1, introducing the molten salt carrying the fission gas into the Venturi microbubble generation device, and injecting the carrier gas through a gas injection hole of the Venturi microbubble generation device;
s2, enabling molten salt carrying fission gas and carrier gas to enter a flow channel of the fluid oscillator from the Venturi microbubble generation device, and generating oscillation jet flow due to the wall attachment effect to realize self oscillation of the fluid;
s3, enabling the molten salt carrying the fission gas and the carrier gas to enter a reaction kettle from the fluid oscillator, strengthening the turbidness of the fluid in the reaction kettle, accelerating the mass transfer efficiency, enabling the carrier gas to fully absorb the fission gas, and enabling the molten salt to form bubble flow carrying micro bubbles;
s4, enabling the bubbly flow of the molten salt carrying the microbubbles to enter a tangential inlet on the side face of the centrifugal columnar gas-liquid separator and then form a rotational flow around the cavity, generating different gravity and centrifugal force due to gas-liquid density difference to further form a gas core, returning the gas core to the reaction kettle from the overflow pipe at the upper part, and returning the molten salt subjected to fission gas removal to the molten salt loop from the tangential underflow port.
Further, the fission gas to be removed is krypton or xenon.
Compared with the prior art, the invention has the following beneficial effects: centrifugal separators do not have such disadvantages and it is therefore considered to replace the existing cyclonic separation technology with centrifugal separators.
1. The trace gas removal device can effectively remove fission gases such as krypton and xenon in a molten salt reactor molten salt loop, reduce neutron loss, reduce equipment maintenance cost and obviously improve the economic benefit of the molten salt reactor.
2. The trace gas removing device provided by the invention adopts a mode of combining the fluid oscillator and the reaction kettle to carry out mass transfer, and due to the self-oscillation of the fluid, the fluid can be fully stirred without using a stirrer, so that the mass transfer efficiency is enhanced.
3. The trace gas removing device provided by the invention adopts the centrifugal columnar gas-liquid separator, overcomes the defects of harsh separation conditions and high requirement on back pressure of the traditional cyclone separator, and has good robustness.
4. The trace gas removal device adopts the integrated design of the mass transfer device and the separator, greatly reduces the occupied area of equipment, and provides possibility for the small-sized modular design of the molten salt reactor.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a perspective view of a trace gas removal unit according to the present invention;
FIG. 2 is a schematic view of the structure of the trace gas removal apparatus of the present invention;
FIG. 3 is a perspective view of a Venturi microbubble generation device in the trace gas removal device according to the present invention;
FIG. 4 is a perspective view of a venturi-type microbubble generating device in the trace gas removal device according to the present invention;
FIG. 5 is a perspective view of a fluidic oscillator in the trace gas removal device of the present invention;
FIG. 6 is a front view of FIG. 5;
FIG. 7 is a front view of a reaction vessel in the trace gas removal device of the present invention;
FIG. 8 is a perspective view of a reaction vessel in the trace gas removal device of the present invention;
FIG. 9 is a schematic view showing the structure of a centrifugal column-shaped gas-liquid separator in the trace gas removing device according to the present invention;
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
During the operation of the molten salt reactor, a large amount of gas neutron poisons such as xenon and krypton are generated, and the safety and the efficiency of the reactor are damaged, so that the online separation of fission gas products is necessary. In view of the characteristics of high viscosity of liquid molten salt medium of the molten salt reactor, tiny bubbles in a loop and the like, the online degassing device of the loop, which comprises a Venturi microbubble generation device, a fluid oscillator, a reaction kettle and a centrifugal columnar gas-liquid separator, is designed. Molten salt carrying tiny bubbles enters the integral device, fission gas is adsorbed on carrier gas through the Venturi microbubble generation device, the fluid oscillator and the reaction kettle, rotational flow is formed in a pipe column after the fission gas passes through an inlet section of the centrifugal columnar gas-liquid separator, a low-pressure area is formed in the center of the cylinder, the bubbles are gathered towards the center, the bubbles are led out of the separator through an upper end overflow port, the molten salt along the wall surface of the cylinder is led out from a bottom flow port of the separator and returns to a molten salt loop, and gas-liquid separation is completed.
As shown in fig. 1 to 9, the present invention will be described in further detail with reference to specific embodiments.
Example 1
A micro gas removing device based on fluid self-oscillation and micro-interface reinforcement comprises a Venturi micro-bubble generating device 1, a fluid oscillator 2, a reaction kettle 3 and a gas-liquid separating device 4; the bottom end of the gas-liquid separation device 4 is provided with a tangential underflow port 41, the side surface is provided with a tangential inlet 42, the tangential inlet is favorable for fluid to flow along the wall surface to form rotational flow, and the top end is provided with an overflow pipe 43; the side surface of the reaction kettle 3 is provided with a tangential outlet 31, and the top part is provided with a gas-liquid mixture inlet 32; the bottom of the venturi micro-bubble generating device 1 is communicated with the molten salt loop, the top of the venturi micro-bubble generating device 1 is connected with the bottom of the fluid oscillator 2, and the middle of the venturi micro-bubble generating device 1 is also provided with a gas injection hole 11; the top of the fluid oscillator 2 is connected to the bottom end of the reaction kettle 3; the gas-liquid mixture inlet 32 at the top end of the reaction kettle 3 is communicated with the overflow pipe 43 at the top end of the gas-liquid separation device 4; the tangential inlet 42 on the side surface of the gas-liquid separation device 4 is connected with the tangential outlet 31 on the side surface of the reaction kettle 3; and a tangential underflow port 41 at the bottom end of the gas-liquid separation device 4 is communicated with a molten salt loop.
The specific structures of the venturi microbubble generation device 1, the fluid oscillator 2, the reaction kettle 3, and the gas-liquid separation device 4 are as follows:
the venturi micro-bubble generating device 1 includes from bottom to top: the gas injection device comprises six parts, namely an inlet straight pipe section 12, a contraction section 13, a cylindrical throat 14, an expansion section 15, an outlet straight pipe section 16 and a gas injection hole 11 of the throat, wherein the gas injection hole 11 is communicated with an external gas source, and nitrogen is introduced to be used as carrier gas to enter the Venturi tube. Preferably, a dissolved oxygen detector is installed in front of the venturi tube for detecting the oxygen concentration.
The reaction kettle 3 comprises a divergent section 33 and a straight cylinder cavity 34 from bottom to top, a tangential outlet 31 is arranged on the side surface of the straight cylinder cavity 34, and a gas-liquid mixture inlet 32 is arranged at the top of the straight cylinder cavity 34; the divergent section 33 communicates with the outlet divergent section 24 of the fluidic oscillator 2.
The gas-liquid separation device 4 is a centrifugal cylindrical gas-liquid separator, and comprises an overflow pipe 43 with an inner diameter of D1, a large-diameter straight cylinder cavity 44 with a length of L1 and an inner diameter of D2, a tapered cavity 45 with a length of L2, and a small-diameter straight cylinder cavity 46 with a length of L3 and a diameter of D3, wherein the side surface of the large-diameter straight cylinder cavity 44 is provided with a tangential inlet 42 with a tangential angle of alpha, the bottom end side wall of the small-diameter straight cylinder cavity 46 is provided with a tangential underflow port 41 with an inner diameter of D4, a circular pipe section at one end of the overflow pipe 43 is partially inserted into the large-diameter straight cylinder cavity 44, and the other end of the overflow pipe is connected with the gas-liquid mixture inlet 32 of the reaction kettle 3. The inner diameter D1 of the overflow pipe 43 is 50mm, the length L1 of the large-diameter straight cylinder cavity 44 is 600mm, the inner diameter D2 is 150mm, the tangential angle alpha of the tangential inlet 42 is 27 degrees, a tangential angle is set to better form a cyclone, the separation effect is enhanced, the length L2 of the tapered cavity 45 is 675mm, the length L3 of the small-diameter straight cylinder cavity 46 is 75mm, the inner diameter D3 is 100mm, and the inner diameter D4 of the tangential underflow port 41 is 50 mm.
Example 2
Example 2 is a preferred example of example 1.
In embodiment 2, the diffusion angle of the diverging section 33 is the same as that of the outlet diffusion section 24, and a conical flow stabilizer 47 having an apex angle β of 30 ° is provided at the bottom of the small diameter straight cylindrical cavity 46, so that a gas core can be better formed in the gas-liquid separation apparatus. The rest is the same as the structure in embodiment 1.
Example 3
Example 3 is an application example of example 1 or example 2.
The method for removing the trace gas by adopting the trace gas removing device based on the fluid self-oscillation and the micro-interface strengthening specifically comprises the following steps:
s1, introducing the molten salt carrying the fission gas into the Venturi micro-bubble generating device 1, and injecting the carrier gas from the gas injection hole 11 of the Venturi micro-bubble generating device through a circulating pump; the fission gas to be removed is krypton or xenon.
S2, enabling the molten salt carrying the fission gas and the carrier gas to enter a flow channel of the fluid oscillator 2 from the Venturi microbubble generation device 1, and generating oscillation jet flow due to the wall attachment effect to realize self oscillation of the fluid;
s3, enabling the molten salt carrying the fission gas and the carrier gas to enter a reaction kettle 3 from the fluid oscillator 2, and in the reaction kettle 3, strengthening the turbidness of the fluid, accelerating the mass transfer efficiency, enabling the carrier gas to fully absorb the fission gas, and enabling the molten salt to form bubble-shaped flow carrying micro bubbles;
s4, enabling the bubbly flow of the molten salt carrying the microbubbles to enter a tangential inlet on the side face of the centrifugal columnar gas-liquid separator and then form a rotational flow around the cavity, generating different gravity and centrifugal force due to gas-liquid density difference to further form a gas core, returning the gas core to the reaction kettle 2 from the overflow pipe 43 at the upper part, and returning the molten salt subjected to fission gas removal to the molten salt loop from the tangential underflow port 41.
To test the loop operation and verify the separation effect, the following experiment was designed:
specifically, the gaseous fission products to be removed are replaced by oxygen, and the carrier gas argon in the molten salt pile is replaced by nitrogen. After the oxygen is dyed by the resazurin reagent, the high-speed camera performs shooting analysis, so that the oxygen distribution condition can be conveniently observed. After the oxygen concentration is detected by the dissolved oxygen detector, the gas removal efficiency is determined by comparing the oxygen concentration changes of the fluid before and after passing through the oscillator, the reaction kettle and the separation device.
Specifically, when the distilled water carrying the 'fission gas' oxygen and the carrier gas nitrogen pass through a flow passage of the fluid oscillator, oscillation jet flow can be generated due to the wall attachment effect, and the turbidness of the fluid is enhanced when the distilled water and the carrier gas nitrogen pass through the reaction kettle, so that the mass transfer efficiency is accelerated, and the nitrogen carrier gas can fully absorb the oxygen.
Specifically, bubble-shaped flow of distilled water carrying micro bubbles enters a tangential inlet on the side surface of the centrifugal columnar gas-liquid separator and then forms rotational flow around the cavity, different gravity and centrifugal force are generated due to gas-liquid density difference, so that a gas core is formed, the gas core returns to the reaction kettle from an upper overflow port, and the distilled water after gas removal returns to the circulating pump from a bottom flow port to form loop circulation.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A micro gas removing device based on fluid self-oscillation and micro-interface strengthening is characterized by comprising a Venturi micro-bubble generating device (1), a fluid oscillator (2), a reaction kettle (3) and a gas-liquid separating device (4);
the bottom end of the gas-liquid separation device (4) is provided with a tangential underflow port (41), the side surface is provided with a tangential inlet (42), and the top end is provided with an overflow pipe (43);
a tangential outlet (31) is arranged on the side surface of the reaction kettle (3), and a gas-liquid mixture inlet (32) is arranged at the top of the reaction kettle;
the bottom of the Venturi microbubble generation device (1) is communicated with the molten salt loop, the top of the Venturi microbubble generation device is connected with the bottom of the fluid oscillator (2), and the middle of the Venturi microbubble generation device (1) is also provided with a gas injection hole (11);
the top of the fluid oscillator (2) is connected to the bottom end of the reaction kettle (3); a gas-liquid mixture inlet (32) at the top end of the reaction kettle (3) is communicated with an overflow pipe (43) at the top end of the gas-liquid separation device (4); a tangential inlet (42) on the side surface of the gas-liquid separation device (4) is connected with a tangential outlet (31) on the side surface of the reaction kettle (3); and a tangential underflow port (41) at the bottom end of the gas-liquid separation device (4) is communicated with the molten salt loop.
2. The micro-gas removal device based on fluid self-oscillation and micro-interface strengthening as claimed in claim 1, wherein the fluid oscillator (2) comprises an inlet tapered section (21), a diffusion cavity (22), a flow guiding boss (23) and an outlet diffusion section (24), the top of the venturi micro-bubble generation device (1) is connected to the inlet tapered section (21), the inlet tapered section (21) is connected to the diffusion cavity (22), the flow guiding boss (23) is disposed in the diffusion cavity (22), the diffusion cavity (22) is connected to the outlet diffusion section (24), and the outlet diffusion section (24) is communicated to the bottom end of the reaction kettle (3).
3. The micro-gas removal device based on fluid self-oscillation and micro-interface strengthening as claimed in claim 1 or 2, wherein the reaction kettle (3) comprises a divergent section (33) and a straight cylindrical cavity (34) from bottom to top, a tangential outlet (31) is arranged on the side surface of the straight cylindrical cavity (34), and a gas-liquid mixture inlet (32) is arranged on the top of the straight cylindrical cavity (34); the divergent section (33) communicates with an outlet divergent section (24) of the fluidic oscillator (2).
4. The micro gas removal device based on self-oscillation of fluid and micro interface strengthening according to claim 3, wherein the divergent section (33) is in accordance with the diffusion angle of the outlet divergent section (24).
5. The micro-gas removal device based on fluid self-oscillation and micro-interface strengthening according to claim 1, wherein the gas-liquid separation device (4) is a centrifugal cylindrical gas-liquid separator, and comprises an overflow pipe (43) with an inner diameter of D1, a large-diameter straight cylindrical cavity (44) with a length of L1 and an inner diameter of D2, a tapered cavity (45) with a length of L2 and a small-diameter straight cylindrical cavity (46) with a length of L3 and a diameter of D3, which are arranged from top to bottom, the side surface of the large-diameter straight cylindrical cavity (44) is provided with a tangential inlet (42) with a tangential angle of alpha, the bottom end side wall of the small-diameter straight cylindrical cavity (46) is provided with a tangential underflow port (41) with an inner diameter of D4, one end of a circular pipe section of the overflow pipe (43) is partially inserted into the large-diameter straight cylindrical cavity (44), and the other end of the overflow pipe is connected with the inlet (32) of the gas-.
6. The micro-gas removal device based on self-oscillation of fluid and micro-interface strengthening according to claim 5, characterized in that the bottom of the small diameter straight cylinder cavity (46) is provided with a conical flow stabilizer (47) with a vertex angle β.
7. Micro gas removal device based on fluidic self-oscillation and micro-interface strengthening according to claim 6, characterized in that the conical flow stabilizer (47) has a vertex angle β of 30 °.
8. The micro-gas removal device based on fluid self-oscillation and micro-interface intensification as claimed in claim 5, wherein the inner diameter D1 of the overflow pipe (43) is 40-50mm, the length L1 of the large-diameter straight cylinder cavity (44) is 600mm, the inner diameter D2 is 96-150mm, the tangential angle α of the tangential inlet (42) is 24-30 °, the length L2 of the tapered cavity (45) is 300-675mm, the length L3 of the small-diameter straight cylinder cavity (46) is 50-75mm, the inner diameter D3 is 64-100mm, and the inner diameter D4 of the tangential underflow port (41) is 40-50 mm.
9. A trace gas removal method, which is characterized by adopting the trace gas removal device based on fluid self-oscillation and micro-interface strengthening as claimed in any one of claims 1 to 8, and comprises the following steps:
s1, introducing the molten salt carrying the fission gas into the Venturi microbubble generation device (1), and injecting the carrier gas through a gas injection hole (11) of the Venturi microbubble generation device;
s2, enabling molten salt carrying fission gas and carrier gas to enter a flow channel of the fluid oscillator (2) from the Venturi microbubble generation device (1), and generating oscillation jet flow due to the wall attachment effect to realize self oscillation of the fluid;
s3, enabling the molten salt carrying the fission gas and the carrier gas to enter a reaction kettle (3) from the fluid oscillator (2), and in the reaction kettle (3), enhancing the turbidness of the fluid to enable the carrier gas to fully absorb the fission gas, so that the molten salt forms bubble-shaped flow carrying micro bubbles;
s4, enabling the bubbly flow of the molten salt carrying the micro bubbles to enter a tangential inlet on the side face of the centrifugal columnar gas-liquid separator and then form a rotational flow around the cavity, generating different gravity and centrifugal force due to gas-liquid density difference, further forming a gas core, returning the gas core to the reaction kettle (3) from the upper part of the overflow pipe (43), and returning the molten salt subjected to fission gas removal to a molten salt loop from the tangential underflow port (41).
10. A trace gas removal method as claimed in claim 9, wherein said fission gas to be removed is krypton or xenon.
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| CN113816460A (en) * | 2021-10-14 | 2021-12-21 | 华东理工大学 | Self-overflow iterative separation cyclone and application thereof in separation of DNAs PLs in underground water |
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