WO2026031433A1 - Appareil de mélange gaz-liquide destiné à une centrale nucléaire - Google Patents

Appareil de mélange gaz-liquide destiné à une centrale nucléaire

Info

Publication number
WO2026031433A1
WO2026031433A1 PCT/CN2024/138593 CN2024138593W WO2026031433A1 WO 2026031433 A1 WO2026031433 A1 WO 2026031433A1 CN 2024138593 W CN2024138593 W CN 2024138593W WO 2026031433 A1 WO2026031433 A1 WO 2026031433A1
Authority
WO
WIPO (PCT)
Prior art keywords
mixing
gas
pipe
liquid
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/138593
Other languages
English (en)
Chinese (zh)
Inventor
谢恩飞
王耀东
王争光
李盛杰
刘喜超
林丰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Nuclear Power Engineering Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Original Assignee
China Nuclear Power Engineering Co Ltd
Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Nuclear Power Engineering Co Ltd, Shenzhen China Guangdong Nuclear Engineering Design Co Ltd filed Critical China Nuclear Power Engineering Co Ltd
Publication of WO2026031433A1 publication Critical patent/WO2026031433A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/40—Static mixers
    • B01F25/42—Static mixers in which the mixing is affected by moving the components jointly in changing directions, e.g. in tubes provided with baffles or obstructions
    • B01F25/43—Mixing tubes, e.g. wherein the material is moved in a radial or partly reversed direction
    • B01F25/431—Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/2366—Parts; Accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/20—Mixing gases with liquids
    • B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
    • B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
    • B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
    • B01F23/23764—Hydrogen
    • 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
    • G21C19/28—Arrangements for introducing fluent material into the reactor core; Arrangements for removing fluent material from the reactor core

Definitions

  • This invention relates to the field of gas-liquid mixing technology, and more particularly to a gas-liquid mixing device for a nuclear power plant.
  • this hydrogenation method has the following drawbacks: 1) The control box is covered with hydrogen, and a large amount of hydrogen accumulates in the gas phase, posing safety risks such as hydrogen explosion and fire; 2) The amount of hydrogen added required to adjust or maintain the hydrogen concentration of the primary coolant is achieved by adjusting or controlling the gas phase pressure of the control box, which can only slowly adjust the dissolved hydrogen concentration of the primary coolant, which is time-consuming and has low adjustment accuracy; 3) During the unit startup and shutdown phases, the type of gas covering the control box needs to be changed, that is, hydrogen is replaced with nitrogen, and then air.
  • the technical problem to be solved by the present invention is to provide a gas-liquid mixing device for nuclear power plants.
  • a gas-liquid mixing device for a nuclear power plant comprising: a liquid inlet pipe, a gas inlet pipe, a fluid mixing pipe and a fluid outlet pipe.
  • the fluid mixing pipe is provided with a plurality of mixing elements arranged along its axial direction.
  • the plurality of mixing elements includes at least one first mixing element and at least one second mixing element, and the flow channels of the first mixing element and the second mixing element are staggered.
  • the first mixing element near the inlet end of the fluid mixing pipe is fitted with the first second mixing element, and the remaining mixing elements are spaced apart from the adjacent preceding mixing element.
  • the medium velocity in the fluid mixing pipe is 0.6 m/s to 1 m/s. If the central axis of the fluid mixing pipe is parallel to the horizontal plane, the other mixing elements have a first distance L between them and the adjacent previous mixing element, and the first distance L is less than 600 mm. If the central axis of the fluid mixing pipe is perpendicular to the horizontal plane, the other mixing elements have a second distance L’ between them and the adjacent previous mixing element, and the second distance L’ is less than 1800 mm.
  • the remaining mixing elements when the central axis of the fluid mixing pipe is parallel to the horizontal plane and the first spacing L ⁇ 200 mm, the remaining mixing elements include a plurality of first mixing elements and a plurality of second mixing elements arranged alternately.
  • the remaining mixing elements when the central axis of the fluid mixing pipe is parallel to the horizontal plane and the first spacing L > 350 mm, the remaining mixing elements include a plurality of first mixing elements.
  • the remaining mixing elements when the central axis of the fluid mixing pipe is parallel to the horizontal plane and 200mm ⁇ first spacing L ⁇ 350mm, the remaining mixing elements include a plurality of alternating first mixing elements and a plurality of second mixing elements, or the remaining mixing elements include a plurality of first mixing elements.
  • the mixing element is composed of several corrugated sheets stacked together, with the crests and troughs of the cross sections of adjacent corrugated sheets connected one-to-one, and/or adjacent corrugated sheets are connected by connecting pieces; the plane on which the corrugated sheet of the first mixing element is located is perpendicular to the plane on which the corrugated sheet of the second mixing element is located.
  • the plane containing the corrugated sheet of the first mixing element is perpendicular to the horizontal plane, and the plane containing the corrugated sheet of the second mixing element is parallel to the horizontal plane.
  • the corrugated sheet is formed by repeatedly arranging or sequentially arranging a plurality of corrugated units along the length direction, and the corrugated shape of the corrugated unit is at least one of V-shape, U-shape, ⁇ -shape, and C-shape.
  • the spaced-apart hybrid elements are connected and fixed by a support member, which is a support frame in the shape of a cylinder or a square.
  • the outlet end of the air inlet pipe extends from the side wall of the liquid inlet pipe into the liquid inlet pipe and extends along the direction of fluid flow.
  • the air intake pipe includes an air intake section, a curved section, and an air outlet section.
  • the air intake section is located outside the liquid intake pipe, and the curved section and the air outlet section are located inside the liquid intake pipe.
  • the central axis of the air intake section is perpendicular to that of the air outlet section, and the air outlet section is coaxially arranged with the liquid intake pipe.
  • the central axes of the inlet pipe, the fluid mixing pipe, and the fluid outlet pipe coincide.
  • the fluid mixing pipe is detachably connected to the inlet pipe and the fluid outlet pipe, respectively, and the detachable connection is a flange connection, a snap-fit connection or a threaded connection.
  • the detachable connection is a flange connection.
  • the inlet and outlet ends of the fluid mixing pipe are respectively provided with a first flange and a second flange.
  • the outlet end of the liquid inlet pipe is provided with a third flange connected to the first flange.
  • the inlet end of the fluid outlet pipe is provided with a fourth flange connected to the second flange.
  • the first flange and the third flange are connected by a first fastener, and the second flange and the fourth flange are connected by a second fastener.
  • This invention proposes a gas-liquid mixing device for nuclear power plants.
  • Gas and liquid enter a fluid mixing pipe via inlet pipes and liquid inlet pipes.
  • a first and second mixing element breaks up bubbles and mixes the gas and liquid, ensuring thorough contact and mixing. This promotes the dissolution of gases (such as hydrogen), thereby maintaining or increasing the dissolved hydrogen concentration in the primary coolant.
  • gases such as hydrogen
  • This ensures the necessary reducing water chemistry environment for the primary coolant, inhibits water irradiation decomposition, and reduces corrosion of primary equipment materials.
  • using a gas-liquid mixing device eliminates the safety hazards of hydrogen explosions and fires caused by large amounts of hydrogen accumulation in the capacitive control tank. It also improves the adjustment rate and control accuracy of the primary coolant hydrogen concentration, while avoiding the cumbersome changes in the gas coverage of the capacitive control tank during startup and shutdown.
  • the gas-liquid mixing device offers significant advantages in both safety and economy.
  • Figure 1 is a schematic diagram of the structure of a nuclear power plant gas-liquid mixing device in some embodiments of the present invention
  • Figure 2 is a magnified view of part A in Figure 1;
  • Figure 3 is a schematic diagram of the structure of a nuclear power plant gas-liquid mixing device in some other embodiments of the present invention.
  • Figure 4 shows the relationship between the flow velocity of the medium and the gas concentration in the fluid mixing pipe of the present invention.
  • liquid inlet pipe 1 air inlet pipe 2, air inlet section 21, curved section 22, air outlet section 23, fluid mixing pipe 3, first mixing element 31, second mixing element 32, and fluid output pipe 4.
  • terms such as “installation,” “connection,” “linking,” “fixing,” and “setting” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being “on” or “below” another component, the component can be located “directly” or “indirectly” on the other component, or there may be one or more intermediary components.
  • the nuclear power plant gas-liquid mixing device in some embodiments of the present invention can be used for hydrogen mixing of coolant in the primary loop of a nuclear power plant.
  • the gas-liquid mixing device includes: a liquid inlet pipe 1, a gas inlet pipe 2, a fluid mixing pipe 3, and a fluid outlet pipe 4.
  • the gas inlet pipe 2 is connected to the liquid inlet pipe 1, and the liquid inlet pipe 1, fluid mixing pipe 3, and fluid outlet pipe 4 are sequentially connected.
  • Gas or a gas-liquid mixture is introduced into the gas inlet pipe 2, containing only a small amount of liquid.
  • hydrogen or a small amount of coolant containing hydrogen is introduced into the gas inlet pipe 2, and coolant is introduced into the liquid inlet pipe 1.
  • the hydrogen and coolant are fully contacted and mixed in the fluid mixing pipe 3, and then discharged from the gas-liquid mixing device through the fluid outlet pipe 4.
  • the outlet end of the air inlet pipe 2 extends into the liquid inlet pipe 1 from the side wall of the liquid inlet pipe 1 and extends along the fluid flow direction.
  • the air inlet pipe 2 includes an air inlet section 21, a curved section 22, and an air outlet section 23 connected in sequence.
  • the air inlet section 21 is located outside the liquid inlet pipe 1, while the curved section 22 and the air outlet section 23 are located inside the liquid inlet pipe 1.
  • the central axes of the air inlet section 21 and the air outlet section 23 are perpendicular, and the air outlet section 23 is coaxially arranged with the liquid inlet pipe 1.
  • the air inlet pipe 2 may extend obliquely into the liquid inlet pipe 1, i.e., the angle between the air inlet section 21 of the air inlet pipe 2 and the central axis of the liquid inlet pipe 1 is less than 90 degrees.
  • the fluid mixing pipe 3 contains several mixing elements arranged along its axial direction.
  • the outer side of the mixing elements is in contact with the inner wall of the fluid mixing pipe 3, or there is a small gap between the outer side of the mixing elements and the inner wall of the fluid mixing pipe 3.
  • the cross-sectional shape of the mixing elements is consistent with the cross-sectional shape of the fluid mixing pipe 3, for example, both the mixing elements and the fluid mixing pipe 3 have rectangular or circular cross-sectional shapes.
  • the mixing element can be composed of several corrugated sheets stacked together.
  • the crests and troughs of the cross-sections of adjacent corrugated sheets are connected one-to-one, and/or adjacent corrugated sheets are connected by connecting pieces, thereby forming a tortuous and narrow flow channel between adjacent corrugated sheets and between adjacent corrugated sheets and connecting pieces, which has a good effect on breaking up bubbles.
  • adjacent corrugated sheets are connected by connecting pieces
  • the mixing unit is composed of several corrugated sheets and several connecting pieces stacked alternately, with the corrugated sheets and connecting pieces stacked so that their projections completely overlap. Under the action of several mixing elements, the gas is broken into tiny bubbles in the fluid mixing pipe 3, which fully contact and dissolve into the liquid.
  • the corrugated sheet can be formed by repeatedly arranging or sequentially placing several corrugated units along its length.
  • the corrugation shape of the corrugated units is at least one of V-shape, U-shape, ⁇ -shape, and C-shape.
  • the wavelengths of the several corrugated sheets can be the same or different.
  • wavelength refers to the distance between two adjacent peaks (or troughs) of the cross-section of the corrugated sheet.
  • the hybrid element can be an SMV type hybrid element (a commercially available product).
  • the mixing elements include at least one first mixing element 31 and at least one second mixing element 32, with the flow channels of the first mixing element 31 and the second mixing element 32 arranged alternately.
  • the first mixing element 31 and the second mixing element 32 have the same shape, structure, and size, but their arrangement directions within the fluid mixing pipe 3 are different.
  • the plane containing the corrugated sheet of the first mixing element 31 is perpendicular to the plane containing the corrugated sheet of the second mixing element 32, allowing gas and liquid to mix in opposite longitudinal and transverse directions.
  • the plane containing the corrugated sheet of the first mixing element 31 is perpendicular to the horizontal plane (defined as the first mixing element 31 being arranged longitudinally), and the plane containing the corrugated sheet of the second mixing element 32 is parallel to the horizontal plane (defined as the second mixing element 32 being arranged transversely).
  • the first mixing element 31 not only breaks up bubbles but also guides them to the bottom of the fluid mixing pipe 3, resulting in more uniform gas-liquid mixing.
  • the first mixing element 31 and the first mixing element 32 are fitted together near the inlet end of the fluid mixing pipe 3. Thus, after the gas and liquid enter the fluid mixing pipe 3 from the liquid inlet pipe 1, they first pass through the staggered flow channels, so that the bubble breaking and gas-liquid mixing effect reach the best state.
  • the remaining mixing elements are spaced apart from the adjacent previous mixing element, so that mass transfer can also be performed in the section of the fluid mixing pipe 3 without mixing elements.
  • the fluid mixing pipe 3 When the medium flow rate is between 0.6 m/s and 1 m/s (0.66 m/s being the optimal flow rate), the fluid mixing pipe 3 exhibits good gas-liquid mixing performance, while the pressure differential in the fluid mixing pipe 3 can be controlled at a suitable level.
  • the flow rate at the primary coolant inlet of the nuclear power plant actually has two corresponding velocities under different operating conditions: approximately 0.66 m/s under normal operating conditions and approximately 1.33 m/s under high-flow purification conditions. Selecting a medium flow velocity of 0.6 m/s to 1 m/s within the fluid mixing pipe 3 ensures the hydrogen mixing capacity under normal operating conditions while maintaining a reasonable pressure differential under high-flow purification conditions.
  • the medium velocity in the fluid mixing pipe 3 is 0.6 m/s to 1 m/s
  • the central axis of the fluid mixing pipe 3 is parallel to the horizontal plane, and the other mixing elements have a first distance L between them and the adjacent mixing element, and the first distance L is less than 600 mm
  • the air bubbles in the pipe section without mixing elements will have basically floated to the top of the inner wall of the fluid mixing pipe 3. At this time, the effect of the mixing elements on breaking up the air bubbles is small and can be ignored.
  • the first first mixing element 31 and the first second mixing element 32 near the inlet end of the fluid mixing pipe 3 are fitted together, and the remaining mixing elements include several first mixing elements 31 and several second mixing elements 32 arranged alternately, so as to ensure that the gas and liquid are continuously and evenly mixed in both longitudinal and transverse directions, and a more ideal gas-liquid mixing effect can be obtained.
  • the first first mixing element 31 and the first second mixing element 32 near the inlet end of the fluid mixing pipe 3 are fitted together, and the remaining mixing elements include several first mixing elements 31.
  • most of the air bubbles after 350mm have basically floated to the top of the inner wall of the fluid mixing pipe 3.
  • the second mixing elements 32 arranged laterally thereafter can only act on a small number of top air bubbles. Therefore, the remaining mixing elements should all be first mixing elements 31 arranged longitudinally.
  • the first first mixing element 31 and the first second mixing element 32 near the inlet end of the fluid mixing pipe 3 are fitted together.
  • the remaining mixing elements include several first mixing elements 31 and several second mixing elements 32 arranged alternately, or the remaining mixing elements include several first mixing elements 31. Both of these arrangements of the remaining mixing elements can achieve a better gas-liquid mixing effect.
  • the first mixing element 31 and the first mixing element 32 near the inlet end of the fluid mixing pipe 3 are fitted together, and the remaining mixing elements have a second distance L’ between them and the adjacent preceding mixing element, and the second distance L’ is less than 1800 mm.
  • the remaining mixing elements include several alternating first mixing elements 31 and several second mixing elements 32.
  • the second mixing elements 32 are arranged laterally, the gas with lower density will rise and aggregate under the action of buoyancy.
  • the first mixing elements 31 are arranged longitudinally, the gas flow direction is the same as the gravity direction, so the bubbles are not easy to agglomerate. A better gas-liquid mixing effect can be achieved by alternating first mixing elements 31 and second mixing elements 32.
  • the total number of mixing elements is preferably 8 to 20, such as 8, 12, 16, 20, etc.
  • mixing elements are independently fixed within the fluid mixing pipe 3; alternatively, several mixing elements are pre-connected by machining before being placed within the fluid mixing pipe 3. Machining connection methods include, but are not limited to, welding.
  • the spaced-apart mixing elements are connected and fixed by support members (not shown).
  • These support members are support frames, which are cylindrical or square in shape.
  • the length of the support frame is consistent with the length of the fluid mixing pipe 3, and the length of the support frame can be set according to the spacing between the mixing elements.
  • the end faces of the support frame abut against the cross-section of the mixing element, and the outer contour of the end faces of the support frame matches the outer contour of the cross-section of the mixing element.
  • the support frame serves a connecting and supporting function and does not affect the gas-liquid mixing effect in the pipe section without mixing elements.
  • the mixing elements are not fixed within the fluid mixing pipe 3, nor are they pre-connected by processing.
  • the spaced-apart mixing elements are placed within the fluid mixing pipe 3 and spaced apart by several supports. The supports abut against adjacent mixing elements, facilitating installation, replacement, and adjustment of the spacing between the mixing elements.
  • the two ends of the spaced-apart mixing elements are connected to supports, forming an integral structure with each individual mixing element and its two end supports. Several such integral structures are then placed within the fluid mixing pipe 3. This design facilitates installation while improving the overall stability and support of the mixing elements, thus enhancing the bubble breaking effect.
  • the central axes of the inlet pipe 1, the fluid mixing pipe 3, and the fluid outlet pipe 4 coincide, making the flow path of the fluid within the gas-liquid mixing device smoother and enhancing structural stability.
  • the diameter of the fluid mixing pipe 3 is equal to the diameters of the inlet pipe 1 and the fluid outlet pipe 4, or the diameter of the fluid mixing pipe 3 is greater than or less than the diameters of the inlet pipe 1 and the fluid outlet pipe 4.
  • the size of the diameters of the inlet pipe 1 and the fluid outlet pipe 4 has virtually no impact on the gas-liquid mixing effect of the fluid mixing pipe 3.
  • the fluid mixing pipe 3 is detachably connected to the inlet pipe 1 and the fluid outlet pipe 4, respectively.
  • the detachable connection can be a flange connection, a snap-fit connection, or a threaded connection.
  • the detachable connection is a flange connection.
  • the inlet and outlet ends of the fluid mixing pipe 3 are respectively provided with a first flange and a second flange.
  • the outlet end of the inlet pipe 1 is provided with a third flange connected to the first flange, and the inlet end of the fluid outlet pipe 4 is provided with a fourth flange connected to the second flange.
  • the first and third flanges are connected by a first fastener, and the second and fourth flanges are connected by a second fastener. Both the first and second fasteners can include several flange bolts.
  • the detachable connection is a snap-fit connection.
  • the outlet end of the inlet pipe 1 and the inlet end of the fluid outlet pipe 4 are respectively provided with grooves opening towards the fluid mixing pipe 3. Both ends of the fluid mixing pipe 3 are respectively provided with protrusions that engage with the grooves. That is, the inlet pipe 1 and the fluid mixing pipe 3, and the fluid mixing pipe 3 and the fluid outlet pipe 4, are both detachably fixed connections formed by snap-fit.
  • the detachable connection can be a threaded connection.
  • the inner wall of the outlet end of the liquid inlet pipe 1 and the inner wall of the inlet end of the fluid outlet pipe 4 are respectively provided with internal threads that are screwed to the end of the fluid mixing pipe 3.
  • the outer surfaces of both ends of the fluid mixing pipe 3 are respectively provided with corresponding external threads. That is, the liquid inlet pipe 1 and the fluid mixing pipe 3, and the fluid mixing pipe 3 and the fluid outlet pipe 4 are all connected by screwing to form a detachable fixed connection.
  • This invention proposes a gas-liquid mixing device for a nuclear power plant.
  • Gas and liquid enter the fluid mixing pipe 3 through the gas inlet pipe 2 and the liquid inlet pipe 1.
  • the first mixing element 31 and the second mixing element 32 which are arranged in an alternating manner, break up bubbles and mix the gas and liquid, so that the gas and liquid can fully contact and mix, promote the dissolution of gas (such as hydrogen), and then the fluid is discharged through the fluid outlet pipe 4.
  • the gas-liquid mixing device of the present invention is applied to the hydrogen mixing of the primary coolant in a nuclear power plant.
  • the gas-liquid mixing device is installed in the chemical and volume control system (RCV) and connected in parallel with the control box.
  • the gas-liquid mixing device adds hydrogen to the primary coolant discharged downwards, which can gradually increase the dissolved hydrogen concentration in the primary coolant during unit startup and compensate for the normal hydrogen consumption of the reactor coolant system (RCP) during normal operation.
  • RCP reactor coolant system
  • the gas-liquid mixing device of the present invention has the following advantages:
  • control box Since hydrogen mixing is carried out by a gas-liquid mixing device, the control box does not need to be covered with hydrogen, thereby eliminating the safety hazards such as hydrogen explosion and fire caused by a large amount of hydrogen in the gas phase of the control box.
  • the present invention uses a gas-liquid mixing device to directly add hydrogen.
  • the gas-liquid mixing device has a very stable effect on breaking up bubbles.
  • the amount of hydrogen added can be adjusted by the flow control component of the RCV system or by adjusting the pressure of the container.
  • the control is more direct and effective.
  • the control accuracy of the dissolved hydrogen concentration of the primary coolant is higher and the adjustment rate is faster.
  • the gas-liquid mixing device of the present invention has significant advantages in terms of both safety and economy.
  • the gas-liquid mixing device of the present invention can also be extended to gas-liquid mixing processes of different components in other technical fields.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Dispersion Chemistry (AREA)

Abstract

L'invention concerne un appareil de mélange gaz-liquide destiné à une centrale nucléaire, comprenant : un tuyau d'entrée de liquide (1), un tuyau d'entrée de gaz (2), un tuyau de mélange de fluide (3), et un tuyau de sortie de fluide (4). Le tuyau d'entrée de gaz (2) est en communication avec le tuyau d'entrée de liquide (1) ; le tuyau d'entrée de liquide (1), le tuyau de mélange de fluide (3) et le tuyau de sortie de fluide (4) sont en communication séquentielle ; un gaz ou un mélange gaz-liquide est introduit dans le tuyau d'entrée de gaz (2) ; une pluralité d'éléments de mélange sont agencés à l'intérieur du tuyau de mélange de fluide (3) dans la direction axiale de celui-ci ; la pluralité d'éléments de mélange comprend au moins un premier élément de mélange (31) et au moins un second élément de mélange (32) ; et des canaux d'écoulement du premier élément de mélange (31) sont décalés par rapport aux canaux d'écoulement du second élément de mélange (32). Le premier élément de mélange (31) et le second élément de mélange (32), dans le tuyau de mélange de fluide (3), comportant des canaux d'écoulement respectifs décalés les uns par rapport aux autres réalisent un broyage de mousse et une agitation et un mélange gaz-liquide, afin de mettre en œuvre un contact gaz-liquide complet et de mélanger et de favoriser la dissolution de gaz (par exemple, l'hydrogène), ce qui permet de maintenir ou d'augmenter la concentration d'hydrogène dissous dans un liquide de refroidissement de circuit primaire.
PCT/CN2024/138593 2024-08-07 2024-12-11 Appareil de mélange gaz-liquide destiné à une centrale nucléaire Pending WO2026031433A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202411083495.9A CN119075725A (zh) 2024-08-07 2024-08-07 一种核电站气液混合装置
CN202411083495.9 2024-08-07

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WO2026031433A1 true WO2026031433A1 (fr) 2026-02-12

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WO (1) WO2026031433A1 (fr)

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* Cited by examiner, † Cited by third party
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CN119075725A (zh) * 2024-08-07 2024-12-06 深圳中广核工程设计有限公司 一种核电站气液混合装置

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WO2011080782A1 (fr) * 2009-12-30 2011-07-07 Hysytech S.R.L. Procédé et dispositif pour préparer un mélange gazeux homogène à partir d'un écoulement de gaz et à partir d'un écoulement de liquide
CN104437150A (zh) * 2013-09-13 2015-03-25 天津凯德实业有限公司 泡沫发生器
CN209456386U (zh) * 2018-12-29 2019-10-01 四川佳运油气技术服务有限公司 一种天然气增效用混合装置
CN216799312U (zh) * 2022-02-25 2022-06-24 重庆市化工研究院有限公司 一种静态混合器
CN118347340A (zh) * 2024-05-11 2024-07-16 广西防城港核电有限公司 一种气液脉冲装置
CN119075725A (zh) * 2024-08-07 2024-12-06 深圳中广核工程设计有限公司 一种核电站气液混合装置

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