Drying mechanism, vapor-liquid separation assembly and steam generation device
By employing a radially nested and symmetrically arranged drying unit design in the dryer, the problem of uneven steam flow rate in traditional dryers is solved, achieving a more uniform dehumidification effect and flow field distribution, while also supporting compact design and simplified assembly.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER DESIGN COMPANY
- Filing Date
- 2026-05-28
- Publication Date
- 2026-07-14
AI Technical Summary
The parallel arrangement of drying units in traditional dryers leads to uneven steam flow, resulting in localized high flow rates and poor dehumidification uniformity.
Multiple drying units are nested radially, and the structural design, which combines symmetrical ring and coaxial arrangement, optimizes the steam flow area and velocity distribution, enhances the dehumidification effect, and ensures stable steam flow and dehumidification through the design of the outer cover and the drying body.
It achieves uniform distribution of steam flow field, improves dehumidification uniformity, increases flow area, reduces steam humidity, supports compact design, and simplifies assembly process.
Smart Images
Figure CN122377264A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of processing equipment technology, and more specifically, relates to a drying mechanism, a vapor-liquid separation component, and a steam generating device. Background Technology
[0002] Reference Figure 1 and Figure 2 In related technologies, the vapor-liquid separation component in a steam generator includes a vapor-liquid separator 10 and a dryer 20 arranged sequentially from bottom to top. The vapor-liquid separator 10 is used to perform coarse separation of the vapor-liquid mixture, which forms wet steam after coarse separation, thereby reducing the overall humidity. The dryer 20 is used to perform deep dehumidification of the wet steam and further reduce the steam humidity to less than 0.1% to meet the operating requirements of the steam turbine.
[0003] However, the multiple drying units 21 in a conventional dryer 20 are usually arranged in parallel. Due to this arrangement, the steam velocity in the peripheral area of the dryer 20 is higher than that in the central area, which can easily lead to local high velocity and thus result in poor overall dehumidification uniformity of the dryer 20. Summary of the Invention
[0004] The purpose of this application is to provide a drying mechanism, a vapor-liquid separation component, and a steam generating device, in order to solve the technical problem of poor dehumidification uniformity in related technologies.
[0005] To achieve the above objectives, according to one aspect of this application, a drying mechanism is provided, comprising a plurality of drying units arranged in a radially nested manner, wherein the drying units are used to remove liquid droplets from steam.
[0006] In this application, multiple drying units are nested in a radial direction, which can balance the flow area available for steam circulation in the drying mechanism at various radial points, so that steam can circulate evenly in the central and peripheral areas of the drying mechanism. This effectively reduces the difference in steam flow velocity between different areas, suppresses the phenomenon of local high flow velocity, achieves uniform distribution of the overall steam flow field, and thus effectively improves the overall dehumidification uniformity of the drying mechanism.
[0007] Meanwhile, multiple drying units adopt a radially nested layout, which, compared to the traditional parallel arrangement, can make full use of the central and edge spaces of the installation container on which the drying mechanism can be installed. On the one hand, under the constraint of the same installation size, the overall flow area of the drying mechanism can be effectively increased, the steam flow velocity can be reduced, the steam dehumidification capacity can be enhanced, the outlet steam humidity can be stably reduced, and the dehumidification effect of the drying mechanism can be improved. On the other hand, under the premise of meeting the same steam flow area, the space occupied by the drying mechanism can be compressed, the overall size of the drying mechanism can be reduced, which is conducive to the compact and miniaturized design of the drying mechanism.
[0008] Optionally, at least one drying unit has a symmetrical annular cross-section, with the cross-section perpendicular to the central axis of the drying mechanism.
[0009] The cross-section of the drying unit is a symmetrical ring perpendicular to the central axis, making the circumferential structure of the drying unit regular and symmetrical. This structural design can effectively balance the flow area available for steam circulation in all circumferences of the drying unit, weaken the differences in local flow resistance, effectively reduce the difference in steam flow velocity in all circumferences, and achieve the most uniform distribution of the overall steam flow field, thereby improving the overall dehumidification uniformity of the drying mechanism.
[0010] Meanwhile, the drying unit, which adopts a symmetrical ring structure, is highly adaptable to the internal space of the installation container, and can make full use of the circumferential redundant space inside the installation container to achieve a compact and regular arrangement within a limited installation range.
[0011] Optionally, at least one drying unit has a circular cross-section.
[0012] The drying unit has a circular cross-section, a symmetrical and regular structure, and uniform circumferential flow dimensions, which can further balance the steam flow resistance and circumferential flow velocity, and reduce airflow deviation and local flow velocity anomalies. At the same time, the drying unit is highly adaptable to the internal space of the installation container and has a reasonable and compact layout.
[0013] Optionally, each drying unit is arranged coaxially.
[0014] On the one hand, the coaxial arrangement of each drying unit can keep the circumferential gap between adjacent drying units consistent, thereby effectively balancing the steam flow resistance and flow splitting state, reducing the velocity deviation in different areas, suppressing problems such as excessive local velocity, airflow deviation and vortex disturbance, optimizing the overall flow field distribution and improving the uniformity of the flow field distribution.
[0015] On the other hand, each drying unit is assembled with the same axis as the reference, resulting in high structural concentricity, better overall assembly stability and structural regularity, and facilitating modular installation and positioning.
[0016] Optionally, two adjacent drying units can be connected to each other or be integrally molded.
[0017] On the one hand, connecting two adjacent drying units to each other or using an integrated molding structure can improve the overall connection strength and structural rigidity between the drying units, reduce structural deformation caused by vibration and airflow impact during operation, and enhance the overall structural stability of the drying mechanism.
[0018] On the other hand, compared with the traditional method where multiple parallel drying units need to be individually fixed to the mounting container, this application is based on a structural design where each drying unit is nested in sequence along the radial direction of the drying mechanism, and adjacent drying units are connected to each other or are integrally formed parts. Only the outermost drying unit needs to be fixed to the mounting container. This structural design can significantly reduce the number of welding points and welds, reduce the areas that cannot be reached for connection during manufacturing, simplify the assembly process, reduce processing and installation errors, and improve the assembly efficiency and overall assembly quality of the drying mechanism.
[0019] Optionally, the drying unit includes a mounting cover and a drying body. The mounting cover is provided with an air inlet and an air outlet, which are spaced apart and connect the inside and outside of the mounting cover. The drying body is disposed inside the mounting cover and is used to remove liquid droplets from the steam.
[0020] The installation cover not only provides air inlets and outlets for directional steam flow, but also encloses and protects the drying unit inside the cover, blocking interference from external chaotic airflow. This ensures that steam is stably introduced only through the air inlet and discharged in an orderly manner through the outlet after being dehumidified by the drying unit, making the steam flow path regular and controllable.
[0021] Optionally, the mounting cover has an outer peripheral surface with multiple spaced air inlets.
[0022] The designated air inlets can reasonably increase the resistance on the air intake side of the drying unit, balance the air intake flow field, and reduce the problem of excessively high local flow velocity. At the same time, the multiple air inlets can increase the air intake flow area of the mounting cover, realize the multi-point entry of steam, balance the overall air intake flow rate and velocity, reduce the problem of local airflow concentration, ensure that steam smoothly enters the mounting cover and flows through the drying body, optimize the overall flow field distribution, and thus improve the uniformity of dehumidification.
[0023] Optionally, the mounting cover has an upper surface, and the air outlet is located on the upper surface.
[0024] By placing the air outlet on the upper surface of the mounting cover, a reasonable flow direction layout of steam entering from the periphery and exiting from the top can be achieved. This helps to extend the flow path and residence time of steam inside the mounting cover, allowing the steam to fully contact the drying body and improve the removal efficiency of liquid droplets in the steam.
[0025] Meanwhile, the flow pattern of steam entering from the periphery and exiting from the top facilitates the natural fall and collection of condensed droplets by gravity, reducing the risk of droplets being carried out by the upward airflow, further reducing the humidity of the steam after drying, and ensuring a stable dehumidification effect.
[0026] Optionally, the mounting cover also has an inner circumferential surface located inside the mounting cover and distributed radially at intervals from the outer circumferential surface along the drying unit, the inner circumferential surface being inclined from the lower end to the upper end toward the side opposite to the outer circumferential surface.
[0027] The inner circumferential surface is arranged inclined from bottom to top towards the side opposite to the outer circumferential surface, which can form a gentle guiding effect on the upward airflow, reduce the resistance of steam flow and internal airflow disturbance, optimize the flow field distribution inside the drying unit, and ensure uniform and stable airflow delivery.
[0028] Optionally, the outer cover includes an outer peripheral body and an inner peripheral body distributed radially at intervals along the drying unit, wherein the outer peripheral surface is the outer surface of the outer peripheral body away from the inner peripheral body, and the inner peripheral surface is the inner surface of the inner peripheral body close to the outer peripheral body.
[0029] The outer peripheral body has an outer peripheral surface, and the inner peripheral body has an inner peripheral surface. It adopts an internal and external split structure design, which allows each component to be processed independently according to the usage requirements. This realizes the functional division of air intake guidance and internal airflow guidance, with clear structural division of labor, improving the overall structural adaptability.
[0030] Optionally, in two adjacent drying units, the drying unit located on the outer side is the first unit, and the drying unit located on the inner side is the second unit; the inner circumference of the first unit and the outer circumference of the second unit form an air inlet gap, which is used to allow steam to enter the second unit, and the spacing of the air inlet gap decreases from the bottom to the top.
[0031] An independent air intake gap is formed between the first unit and the second unit, which can limit and guide the incoming steam, so that the steam flows in an orderly manner along a preset path, reducing the risk of airflow dispersion and ensuring that the steam enters the second unit stably for drying.
[0032] Meanwhile, the intake gap adopts a structure that is wider at the bottom and narrower at the top, which can moderately throttle and homogenize the upward steam, gently increase the airflow velocity, suppress local eddies and turbulence, and optimize the interlayer flow field distribution.
[0033] Optionally, the drying unit located at the center of the multiple drying units is the central unit. The inner periphery of the central unit forms a maintenance passage, and a maintenance ladder is installed in the maintenance passage. The upper surface of the inner periphery of the central unit is provided with a maintenance port that communicates with the maintenance passage. A sealing cover is pivotally connected to the inner periphery of the central unit. The sealing cover can rotate relative to the inner periphery of the central unit to open or close the maintenance port.
[0034] On the one hand, the maintenance channel formed inside the inner periphery of the central unit can make reasonable use of the spare space of the central unit. Compared with the conventional arrangement of setting the maintenance channel in the middle of the drying mechanism in an extra-long area, the maintenance channel formed by the inner periphery of the central unit can achieve a compact layout without occupying additional installation space, while ensuring that the overall flow area of the drying mechanism meets the usage requirements. This adapts to the integrated assembly requirements of the drying mechanism.
[0035] On the other hand, by setting up an inspection port connected to the maintenance channel, the operator can directly enter the drying unit through the maintenance channel, which makes it convenient for the operator to regularly inspect, maintain and troubleshoot the internal structure of the drying unit, reducing the difficulty of maintenance and the degree of operational restriction.
[0036] On the other hand, the sealing cover is pivotally assembled to the inner circumference and can rotate relative to the inner circumference to switch the use state, thereby realizing the opening and closing of the inspection port. The opening and closing operation is simple and convenient, and the structure is stable and reliable.
[0037] Optionally, the sealing cover is provided with fasteners; when the sealing cover blocks the inspection port, the fasteners are connected to the inner circumference of the central unit; when the inspection port is in the open state, the fasteners are disconnected from the inner circumference of the central unit.
[0038] By using fasteners to achieve a detachable locking fit between the sealing cap and the inner circumference, the assembly firmness of the sealing cap in the closed state can be improved, effectively resisting the impact of internal airflow and equipment vibration, reducing the risk of the sealing cap loosening, shifting or accidentally opening, helping to ensure the sealing reliability of the inspection port, reducing the risk of excessive humidity caused by steam flowing directly out of the inspection port, and reducing the risk of foreign objects entering the inspection channel through the inspection port.
[0039] Optionally, the drying unit also includes a drain pipe located below and connected to the mounting cover; the drain pipes of two adjacent drying units are connected to each other.
[0040] The added drain pipe can collect and discharge the condensate produced by drying and separation in a timely manner, reducing the risk of droplets accumulating and lingering inside the installation cover, and ensuring the efficiency of vapor-liquid separation.
[0041] Meanwhile, the drain pipes of adjacent drying units are interconnected, forming a centralized drain channel to achieve unified collection and orderly discharge of condensate from each drying unit, simplifying the overall pipeline layout structure, reducing the number of independent pipelines, and lowering assembly complexity and subsequent maintenance costs.
[0042] According to another aspect of this application, a vapor-liquid separation assembly is provided, including a vapor-liquid separation mechanism and the aforementioned drying mechanism. The vapor-liquid separation mechanism is located below the drying mechanism and is used to separate a vapor-liquid mixture to obtain steam. The drying mechanism is used to receive the steam and remove liquid droplets from the steam.
[0043] The combined structure of the vapor-liquid separation mechanism and the drying mechanism arranged vertically enables a step-by-step dehumidification process. First, the lower vapor-liquid separation mechanism completes the initial separation of large-diameter droplets, and then the upper drying mechanism further removes the tiny droplets remaining in the vapor. The two-stage structure has a clear division of labor and works in concert.
[0044] This vertical arrangement aligns with the natural upward flow of steam, ensuring smooth and stable airflow. Simultaneously, the two-stage progressive treatment mode effectively enhances the overall vapor-liquid separation and dehumidification purification, reducing the humidity of the final discharged steam and overcoming the shortcomings of single-stage separation structures, which result in incomplete purification and limited treatment effectiveness.
[0045] According to another aspect of this application, a steam generating apparatus is provided, including a steam generating component and the aforementioned vapor-liquid separation component. The steam generating component is used to generate and output a vapor-liquid mixture, and the vapor-liquid separation component is used to receive the vapor-liquid mixture and separate the vapor-liquid mixture to obtain steam.
[0046] The steam generating unit produces and outputs a steam-liquid mixture to the steam-liquid separation unit. The steam-liquid separation unit receives the mixture and dries it, thus enabling the steam generating unit to output steam with the required humidity. This combined design, with clear division of labor among functional units and an overall layout that follows the natural upward flow path of steam, facilitates efficient steam processing.
[0047] The beneficial effects of the drying mechanism provided in this application are as follows: In this application, multiple drying units are nested in the radial direction, which can balance the flow area available for steam circulation in the radial direction of the drying mechanism, so that steam can circulate evenly in the central area and the surrounding area of the drying mechanism, thereby effectively reducing the difference in steam flow velocity between different areas, suppressing the phenomenon of local high flow velocity, realizing the uniform distribution of the overall steam flow field, and thus effectively improving the overall dehumidification uniformity of the drying mechanism.
[0048] Meanwhile, multiple drying units adopt a radially nested layout, which, compared to the traditional parallel arrangement, can make full use of the central and edge spaces of the installation container on which the drying mechanism can be installed. On the one hand, under the constraint of the same installation size, the overall flow area of the drying mechanism can be effectively increased, the steam flow velocity can be reduced, the steam dehumidification capacity can be enhanced, the outlet steam humidity can be stably reduced, and the dehumidification effect of the drying mechanism can be improved. On the other hand, under the premise of meeting the same steam flow area, the space occupied by the drying mechanism can be compressed, the overall size of the drying mechanism can be reduced, which is conducive to the compact and miniaturized design of the drying mechanism. Attached Figure Description
[0049] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0050] Figure 1 This is a simplified structural diagram of a steam generator in related technologies; Figure 2 A top view diagram illustrating the arrangement of multiple drying units in the relevant technology; Figure 3 This is a simplified structural diagram of the steam generator provided in the embodiments of this application; Figure 4 This is a schematic diagram of the drying mechanism provided in the embodiments of this application after the drying body is hidden; Figure 5 This is a top view of the drying mechanism provided in the embodiments of this application after the drying body is hidden; Figure 6 A front view schematic diagram of the drying mechanism provided in the embodiments of this application; Figure 7 for Figure 6 Schematic diagram of the cross section at point BB; Figure 8 This is a cross-sectional view of the drying mechanism provided in the embodiments of this application after the drying body is hidden; Figure 9 for Figure 7 Enlarged view of point C in the middle; Figure 10 for Figure 8 Enlarged view of point E in the middle; Figure 11 for Figure 4 Enlarged view of point A in the middle; Figure 12 A schematic diagram illustrating the steam flow direction provided for an embodiment of this application; Figure 13 for Figure 7 Enlarged view of point D in the middle; The details of the reference numerals used in the above figures are as follows: 10. Vapor-liquid separator; 20. Dryer; 21. Drying unit; 100. Drying mechanism; 110. Drying unit; 111. Mounting cover; 1111. Air inlet; 1112. Air outlet; 1113. Outer peripheral surface; 1114. Upper surface; 1115. Inner peripheral surface; 1116. Outer peripheral body; 1117. Inner peripheral body; 1118. Upper annular plate; 1119. Air inlet gap; 11110. Maintenance passage; 11111. Maintenance ladder; 11112. Sealing cover; 11113. Drain pipe; 112. Drying body; 200. Vapor-liquid separation mechanism; 300. Steam generating assembly; 400. Mounting container. Detailed Implementation
[0051] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to that other element. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0053] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0055] As described in the background section, refer to Figure 1 and Figure 2 In related technologies, the vapor-liquid separation component in a steam generator includes a vapor-liquid separator 10 and a dryer 20 arranged sequentially from bottom to top. The vapor-liquid separator 10 is used to perform coarse separation of the vapor-liquid mixture, which forms wet steam after coarse separation, thereby reducing the overall humidity. The dryer 20 is used to perform deep dehumidification of the wet steam and further reduce the steam humidity to less than 0.1% to meet the operating requirements of the steam turbine.
[0056] However, the multiple drying units 21 in a conventional dryer 20 are usually arranged in parallel. Due to this arrangement, the steam velocity in the peripheral area of the dryer 20 is higher than that in the central area, which can easily lead to local high velocity and thus result in poor overall dehumidification uniformity of the dryer 20.
[0057] Reference Figures 3 to 7 To address the aforementioned problems, according to one aspect of this application, an embodiment of this application provides a drying mechanism 100, which includes a plurality of drying units 110. The plurality of drying units 110 are arranged in a radially nested manner along the drying mechanism 100, and the drying units 110 are used to remove liquid droplets from steam.
[0058] In this embodiment, the drying mechanism 100 is used in a steam generating device, which includes a mounting container 400. The mounting container 400 is cylindrical, and the drying mechanism 100 is integrally assembled inside the mounting container 400. The drying unit 110 can be any functional component with steam dehumidification function, such as a component equipped with multiple parallel corrugated plates, a component equipped with honeycomb dehumidification channels, or a component equipped with a metal fiber filter layer.
[0059] The radial direction of the drying mechanism 100 refers to the direction perpendicular to the central axis of the drying mechanism 100. The radial direction of the drying mechanism 100 is parallel to the radial direction of the mounting container 400 and perpendicular to the vertical direction; see the attached instruction manual. Figure 12 In the diagram, the direction of steam flow is indicated by a dashed line with a solid arrowhead; multiple drying units 110 are nested sequentially along the radial direction of the drying mechanism 100, meaning that each drying unit 110 has a ring structure.
[0060] In this application, multiple drying units 110 are nested in the radial direction, which can balance the flow area available for steam to flow in the drying mechanism 100 at various radial points, so that steam can flow evenly in the central area and the surrounding area of the drying mechanism 100, thereby effectively reducing the difference in steam flow velocity between different areas, suppressing the phenomenon of local high flow velocity, realizing the uniform distribution of the overall steam flow field, and thus effectively improving the overall dehumidification uniformity of the drying mechanism 100.
[0061] Meanwhile, the multiple drying units 110 adopt a radially nested layout, which, compared with the traditional parallel arrangement, can make full use of the central and edge spaces of the installation container 400 on which the drying mechanism 100 can be installed. On the one hand, under the constraint of the same installation size, the overall flow area of the drying mechanism 100 can be effectively increased, the steam flow velocity can be reduced, the steam dehumidification capacity can be enhanced, the outlet steam humidity can be stably reduced, and the dehumidification effect of the drying mechanism 100 can be improved. On the other hand, under the premise of meeting the same steam flow area, the space occupied by the drying mechanism 100 can be compressed, the overall size of the drying mechanism 100 can be reduced, which is conducive to the compact and miniaturized design of the drying mechanism 100.
[0062] Reference Figures 4 to 7 In one embodiment, at least one drying unit 110 has a symmetrical annular cross-section, which is perpendicular to the central axis of the drying mechanism 100.
[0063] In this embodiment, the cross-section of the drying unit 110 can be a regular polygon (equilateral triangle, square, regular hexagon, regular octagon), symmetrical rhombus, ellipse, symmetrical racetrack shape, symmetrical ring, circle, or other symmetrical cross-sectional structures, and the drying unit 110 as a whole has a three-dimensional shape such as a ring column or a ring cylinder.
[0064] The central axis of the drying mechanism 100 refers to the central reference axis of the overall structure of the drying mechanism 100. The central axis of the drying mechanism 100 is perpendicular to the radial line of the drying mechanism 100.
[0065] The cross-section of the drying unit 110 is a symmetrical ring perpendicular to the central axis, making the circumferential structure of the drying unit 110 regular and symmetrical. This structural design can effectively balance the flow area available for steam flow in all circumferential directions of the drying unit 110, weaken the difference in local flow resistance, effectively reduce the difference in steam flow velocity in all circumferential directions, and achieve the most uniform distribution of the overall steam flow field, thereby improving the overall dehumidification uniformity of the drying mechanism 100.
[0066] Meanwhile, the drying unit 110, which adopts a symmetrical ring structure, is highly adaptable to the internal space of the installation container 400. It can make full use of the circumferential redundant space inside the installation container 400 and achieve a compact and regular arrangement within a limited installation range.
[0067] Reference Figures 4 to 7 In one embodiment, at least one drying unit 110 has an annular cross-section.
[0068] The drying unit 110 has a circular cross-section, a symmetrical and regular structure, and uniform circumferential flow dimensions, which can further balance the steam flow resistance and circumferential flow velocity, and reduce airflow deviation and local flow velocity anomalies. At the same time, the drying unit 110 is highly adaptable to the internal space of the installation container 400 and has a reasonable and compact layout.
[0069] Reference Figures 4 to 7 In one embodiment, the drying units 110 are arranged coaxially. In this embodiment, the cross-section of each drying unit 110 is annular, and the central axis of each drying unit 110 is the same central axis, that is, the central axis of the drying mechanism 100.
[0070] On the one hand, the coaxial arrangement of each drying unit 110 can keep the circumferential gap between adjacent drying units 110 consistent, thereby effectively balancing the steam flow resistance and flow splitting state, reducing the flow velocity deviation in different areas, suppressing problems such as excessive local flow velocity, airflow deviation and vortex disturbance, optimizing the overall flow field distribution and improving the uniformity of the flow field distribution.
[0071] On the other hand, each drying unit 110 is assembled with the same axis as the reference, resulting in high structural concentricity, better overall assembly stability and structural regularity, and facilitating modular installation and positioning.
[0072] In one specific embodiment, there are four drying units 110, which are nested sequentially and arranged coaxially.
[0073] Reference Figures 4 to 7 In one embodiment, two adjacent drying units 110 are connected to each other or are integrally formed.
[0074] In this embodiment, two adjacent drying units 110 are connected by connecting components such as connecting brackets or connecting plates; it should be noted that in other embodiments, two adjacent drying units 110 may also be integrally molded parts.
[0075] On the one hand, the interconnection of two adjacent drying units 110 or the adoption of an integral molding structure can improve the overall connection strength and structural rigidity between the drying units 110, reduce the structural deformation caused by vibration and airflow impact during operation, and enhance the overall structural stability of the drying mechanism 100.
[0076] On the other hand, compared with the traditional method where multiple parallel drying units 110 need to be individually fixed to the mounting container 400, this application is based on the structural design where each drying unit 110 is nested in sequence along the radial direction of the drying mechanism 100, and adjacent drying units 110 are connected to each other or are integrally formed parts. Only the outermost drying unit 110 needs to be fixed to the mounting container 400. This structural design can significantly reduce the number of welding points and welds, reduce the areas that cannot be reached for connection during the manufacturing process, simplify the assembly process, reduce processing and installation errors, and improve the assembly efficiency and overall assembly quality of the drying mechanism 100.
[0077] Reference Figures 4 to 12 In one specific embodiment, the drying unit 110 includes a mounting cover 111 and a drying body 112. The mounting cover 111 is provided with an air inlet 1111 and an air outlet 1112. The air inlet 1111 and the air outlet 1112 are spaced apart and connect the inside and outside of the mounting cover 111. The drying body 112 is disposed inside the mounting cover 111 and is used to remove liquid droplets in the steam.
[0078] In this embodiment, the outer cover 111 is generally in the shape of a three-dimensional ring column or ring cylinder; the drying body 112 includes multiple parallel corrugated plates, and a bent channel is formed between adjacent corrugated plates; due to the difference in density between droplets and steam in the gas-liquid mixture, the inertial force and adhesion force are different. When the droplets pass through the bent channel, they cannot deflect with the steam and hit the corrugated plates to form a water film. Under the action of gravity, they gradually gather into a water flow, thereby removing droplets from the steam. The dried steam then flows to the steam turbine.
[0079] The mounting cover 111 not only provides air inlet 1111 and air outlet 1112 to achieve directional steam flow, but also encloses and protects the drying body 112 inside the mounting cover 111, blocking interference from external chaotic airflow. This ensures that steam is stably introduced only through the air inlet 1111 and discharged in an orderly manner from the air outlet 1112 after being dehumidified by the drying body 112, making the steam flow path regular and controllable.
[0080] Reference Figures 9 to 12 In one embodiment, the mounting cover 111 has an outer peripheral surface 1113, and the outer peripheral surface 1113 is provided with a plurality of spaced-apart air inlets 1111. In this embodiment, the outer peripheral surface 1113 of the mounting cover 111 is the outer annular wall surface of the mounting cover 111.
[0081] The air inlet 1111 can reasonably increase the resistance on the air intake side of the drying unit 110, balance the air intake flow field, and reduce the problem of excessive local flow velocity. At the same time, the multiple air inlets 1111 can increase the air intake flow area of the mounting cover 111, realize the multi-point entry of steam, balance the overall air intake flow rate and air intake velocity, reduce the problem of local airflow concentration, ensure that steam enters the mounting cover 111 smoothly and flows through the drying body 112, optimize the overall flow field distribution, and thus improve the dehumidification uniformity.
[0082] In one specific embodiment, some air inlets 1111 are evenly distributed along the axial direction of the mounting cover 111, and some air inlets 1111 are evenly distributed along the circumference of the mounting cover 111, so that all air inlets 1111 are arranged in a matrix. This arrangement can achieve uniform steam intake along the circumference and axial direction, further balance the intake flow, avoid local airflow concentration, ensure that steam enters the interior of the mounting cover 111 stably and smoothly, optimize the flow field distribution, and improve the overall dehumidification uniformity.
[0083] Reference Figure 9 and Figure 10 In one embodiment, the mounting cover 111 has an upper surface 1114, and an air outlet 1112 is disposed on the upper surface 1114.
[0084] In this embodiment, the upper surface 1114 is the uppermost surface of the mounting cover 111, located above the outer peripheral surface 1113. In addition, in order to ensure uniform steam discharge and balance the overall airflow velocity, the air outlet 1112 is arranged along the circumference of the mounting cover 111 and is an annular opening, and multiple air outlets 1112 are arranged sequentially along the radial direction of the drying mechanism 100.
[0085] By placing the air outlet 1112 on the upper surface 1114 of the mounting cover 111, a reasonable flow direction layout of steam entering from the periphery and exiting from the top can be achieved. This helps to extend the flow path and residence time of steam inside the mounting cover 111, allowing the steam to fully contact the drying body 112 and improve the removal efficiency of liquid droplets in the steam.
[0086] Meanwhile, the flow pattern of steam entering from the periphery and exiting from the top facilitates the natural fall and collection of condensed droplets by gravity, reducing the risk of droplets being carried out by the upward airflow, further reducing the humidity of the steam after drying, and ensuring a stable dehumidification effect.
[0087] Reference Figure 9 and Figure 10 In one embodiment, the mounting cover 111 further has an inner peripheral surface 1115, which is located inside the mounting cover 111 and is distributed radially at intervals from the outer peripheral surface 1113 along the drying unit 110. The inner peripheral surface 1115 is inclined from the lower end to the upper end toward the side opposite to the outer peripheral surface 1113.
[0088] In this embodiment, the inner circumferential surface 1115 is the inner annular wall surface on which the outer cover 111 is installed, and the inner circumferential surface 1115 gradually slopes from the lower end to the upper end toward the side opposite to the outer circumferential surface 1113. The drying body 112 is arranged between the outer circumferential surface 1113 and the inner circumferential surface 1115, and the inner circumferential surface 1115 is used to guide the steam treated by the drying body 112 to the outlet 1112.
[0089] The inner circumferential surface 1115 is arranged inclined from bottom to top towards the side opposite to the outer circumferential surface 1113, which can form a gentle guiding effect on the upward airflow, reduce the resistance of steam flow and internal airflow disturbance, optimize the flow field distribution inside the drying unit 110, and ensure uniform and stable airflow delivery.
[0090] Reference Figures 9 to 11 In one embodiment, the mounting cover 111 includes an outer peripheral body 1116 and an inner peripheral body 1117 distributed radially at intervals along the drying unit 110. The outer peripheral surface 1113 is the outer surface of the outer peripheral body 1116 facing away from the inner peripheral body 1117, and the inner peripheral surface 1115 is the inner surface of the inner peripheral body 1117 close to the outer peripheral body 1116.
[0091] In this embodiment, the outer peripheral body 1116 is an open annular plate, and the air inlet 1111 is disposed on the outer peripheral body 1116. The axis of the outer peripheral body 1116 is collinear with the central axis of the drying mechanism 100. The inner peripheral body 1117 is a solid annular plate, and the axis of the inner peripheral body 1117 is collinear with the central axis of the drying mechanism 100. The inner peripheral body 1117 gradually tilts from the lower end to the upper end toward the side away from the outer peripheral body 1116. In addition, the mounting cover 111 also includes an upper annular plate 1118, which is disposed on the outer peripheral body 1116 and located between the outer peripheral body 1116 and the inner peripheral body 1117. The axis of the upper annular plate 1118 is collinear with the central axis of the drying mechanism 100. The upper surface 1114 and the air outlet 1112 are disposed on the upper annular plate 1118.
[0092] The outer peripheral body 1116 has an outer peripheral surface 1113, and the inner peripheral body 1117 has an inner peripheral surface 1115. The design adopts an inner and outer split structure, which allows each component to be processed independently according to the usage requirements. This realizes the functional division of air intake guidance and internal airflow guidance, with clear structural division of labor, and improves the overall structural adaptability.
[0093] Reference Figure 7 , Figure 9 , Figure 10 as well as Figure 12In one embodiment, among two adjacent drying units 110, the drying unit 110 located on the outer side is the first unit, and the drying unit 110 located on the inner side is the second unit; the inner circumference 1117 of the first unit and the outer circumference 1116 of the second unit form an air inlet gap 1119, which is used to allow steam to enter the second unit, and the spacing of the air inlet gap 1119 decreases from the lower end to the upper end.
[0094] In this embodiment, the spacing of the air inlet gaps 1119 gradually decreases from the bottom to the top. An independent air inlet gap 1119 is formed between the first unit and the second unit, which can limit and guide the incoming steam, so that the steam flows in an orderly manner along a preset path, reducing the risk of airflow dispersion and ensuring that the steam enters the second unit stably for drying.
[0095] Meanwhile, the intake gap 1119 adopts a structure that is wider at the bottom and narrower at the top, which can moderately throttle and homogenize the upward steam, gently increase the airflow velocity, suppress local eddies and turbulence, and optimize the interlayer flow field distribution.
[0096] Reference Figure 5 , Figure 7 as well as Figure 13 In one embodiment, the drying unit 110 located at the center of the plurality of drying units 110 is the central unit. The inner circumference 1117 of the central unit forms a maintenance channel 11110, and a maintenance ladder 11111 is provided in the maintenance channel 11110. The upper surface 1114 of the inner circumference 1117 of the central unit is provided with a maintenance port communicating with the maintenance channel 11110. The inner circumference 1117 of the central unit is pivotally connected to a sealing cover 11112, which can rotate relative to the inner circumference 1117 of the central unit to open or block the maintenance port.
[0097] In this embodiment, the inner circumferential body 1117 of the central unit is hollow inside, and the inner diameter of the inner circumferential body 1117 of the central unit gradually decreases from the lower end to the upper end. The inspection port penetrates the upper surface 1114 of the inner circumferential body 1117 of the central unit. The sealing cover 11112 is pivotally connected to the inner circumferential body 1117 of the central unit via a pivot shaft.
[0098] On the one hand, a maintenance channel 11110 is formed inside the inner periphery 1117 of the central unit, which can make reasonable use of the spare space of the central unit. Compared with the conventional arrangement of setting the maintenance channel 11110 in the middle of the drying mechanism 100 in an extra-long area, the maintenance channel 11110 formed by the inner periphery 1117 of the central unit can achieve a compact layout while ensuring that the overall flow area of the drying mechanism 100 meets the usage requirements. It does not require additional installation space and is suitable for the integrated assembly requirements of the drying mechanism 100.
[0099] On the other hand, by setting up an inspection port connected to the maintenance channel 11110, the operator can directly enter the interior of the drying mechanism 100 through the maintenance channel 11110, which makes it convenient for the operator to conduct regular inspections, maintenance and troubleshooting of the internal structure of the drying mechanism 100, reducing the difficulty of maintenance and the degree of operational restriction.
[0100] On the other hand, the sealing cover 11112 is pivotally mounted on the inner circumferential body 1117 and can rotate relative to the inner circumferential body 1117 to switch the use state, thereby realizing the opening and closing of the inspection port. The opening and closing operation is simple and convenient, and the structure is stable and reliable.
[0101] Reference Figure 13 In one embodiment, the sealing cover 11112 is provided with a fastener; when the sealing cover 11112 seals the inspection port, the fastener is connected to the inner circumference 1117 of the central unit; when the inspection port is in the open state, the fastener is disconnected from the inner circumference 1117 of the central unit.
[0102] In this embodiment, fasteners are selected from fastening bolts or fastening pins; it should be noted that fasteners are not limited to the above two forms, and various structural components that can achieve detachable fastening connections, such as snap-fit components, plug-in components, and magnetic components, can also be used to adapt to assembly requirements under different working conditions.
[0103] The use of fasteners to achieve a detachable locking fit between the sealing cover 11112 and the inner circumference body 1117 can improve the assembly firmness of the sealing cover 11112 in the closed state, effectively resist the impact of internal airflow and equipment vibration, reduce the risk of the sealing cover 11112 loosening, shifting or accidentally opening, help ensure the sealing reliability of the inspection port, reduce the risk of steam flowing out directly through the inspection port and causing excessive humidity, and reduce the risk of foreign objects entering the inspection channel 11110 through the inspection port.
[0104] Reference Figure 4 as well as Figures 6 to 8 In one embodiment, the drying unit 110 further includes a drain pipe 11113, which is located below the mounting cover 111 and communicates with the mounting cover 111; the drain pipes 11113 of two adjacent drying units 110 are connected to each other.
[0105] In this embodiment, the drain pipes 11113 of two adjacent drying units 110 converge into a single pipe. In one specific embodiment, among the four drying units 110, the drain pipe 11113 of the innermost drying unit 110 is connected to the drain pipe 11113 of the adjacent drying unit 110, and the drain pipes 11113 of the remaining two drying units 110 are connected. Furthermore, to improve drainage efficiency, each drying unit 110 is provided with multiple drain pipes 11113 spaced apart along its circumference.
[0106] The added drain pipe 11113 can collect and discharge the condensate generated during drying and separation in a timely manner, reducing the risk of droplets accumulating and lingering inside the housing 111, and ensuring the efficiency of vapor-liquid separation.
[0107] Meanwhile, the drain pipes 11113 of adjacent drying units 110 are interconnected, forming a centralized drain channel, realizing the unified collection and orderly discharge of condensate from each drying unit 110, simplifying the overall pipeline layout structure, reducing the number of independent pipelines, and lowering assembly complexity and subsequent maintenance costs.
[0108] Reference Figures 3 to 13 According to another aspect of this application, an embodiment of this application also provides a vapor-liquid separation assembly, which includes a vapor-liquid separation mechanism 200 and the aforementioned drying mechanism 100. The vapor-liquid separation mechanism 200 is located below the drying mechanism 100 and is used to separate the vapor-liquid mixture to obtain steam. The drying mechanism 100 is used to receive the steam and remove liquid droplets from the steam.
[0109] In this embodiment, the vapor-liquid separation mechanism 200 is a vapor-liquid separator used to perform coarse separation of the vapor-liquid mixture to obtain pre-separated steam.
[0110] The combined structure of the vapor-liquid separation mechanism 200 and the drying mechanism 100 arranged vertically enables a step-by-step dehumidification process. First, the lower vapor-liquid separation mechanism 200 completes the initial separation of large-diameter droplets, and then the upper drying mechanism 100 further removes the tiny droplets remaining in the vapor. The two-stage structure has a clear division of labor and works in concert.
[0111] This vertical arrangement aligns with the natural upward flow of steam, ensuring smooth and stable airflow. Simultaneously, the two-stage progressive treatment mode effectively enhances the overall vapor-liquid separation and dehumidification purification, reducing the humidity of the final discharged steam and overcoming the shortcomings of single-stage separation structures, which result in incomplete purification and limited treatment effectiveness.
[0112] Reference Figures 3 to 13 According to another aspect of this application, embodiments of this application also provide a steam generating apparatus, which includes a steam generating component 300 and the aforementioned vapor-liquid separation component. The steam generating component 300 is used to generate and output a vapor-liquid mixture, and the vapor-liquid separation component is used to receive the vapor-liquid mixture and separate the vapor-liquid mixture to obtain steam.
[0113] In the embodiments of this application, the steam generator is the hub of the primary and secondary loops of the nuclear power plant and the most important heat exchange equipment in the pressurized water reactor nuclear power plant. It is used to transfer the heat generated by the reactor to the secondary side to generate steam, which is then delivered to the steam turbine and drives the generator to generate electricity.
[0114] The steam generating device also includes a mounting container 400, a steam generating assembly 300 which is a tube bundle component and is disposed inside the mounting container 400, and a vapor-liquid separation assembly located above the steam generating assembly 300 and disposed inside the mounting container 400.
[0115] The steam generating unit 300 generates and outputs a steam-liquid mixture to the steam-liquid separation unit. The steam-liquid separation unit receives the mixture and dries it, thereby enabling the steam generating unit to output steam with the required humidity. This combined design, with clear division of labor among the functional units and an overall layout that follows the natural upward flow path of steam, facilitates efficient steam processing.
[0116] In summary, implementing the drying mechanism, vapor-liquid separation component, and steam generating device provided in this embodiment has at least the following beneficial technical effects: In this application, multiple drying units 110 are arranged in a radially nested manner, which can balance the flow area available for steam flow in the drying mechanism 100 at various radial locations, so that steam can flow evenly in the central region and the surrounding region of the drying mechanism 100, thereby effectively reducing the difference in steam flow velocity between different regions, suppressing the phenomenon of local high flow velocity, realizing the uniform distribution of the overall steam flow field, and thus effectively improving the overall dehumidification uniformity of the drying mechanism 100.
[0117] Meanwhile, the multiple drying units 110 adopt a radially nested layout, which, compared with the traditional parallel arrangement, can make full use of the central and edge spaces of the installation container 400 where the drying mechanism 100 can be installed. On the one hand, under the constraint of the same installation size, the overall flow area of the drying mechanism 100 can be effectively increased, the steam flow velocity can be reduced, the steam dehumidification capacity can be enhanced, the outlet steam humidity can be stably reduced, and the dehumidification effect of the drying mechanism 100 can be improved. On the other hand, under the premise of meeting the same steam flow area, the space occupied by the drying mechanism 100 can be compressed, and the overall size of the drying mechanism 100 can be reduced, which is conducive to the compact and miniaturized design of the drying mechanism 100. Thus, the size and weight of the steam generating device can be reduced, the size of the nuclear island building of the nuclear power plant can be reduced, and the construction cost of the nuclear power plant can be reduced.
[0118] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A drying mechanism, characterized in that, It includes multiple drying units, which are nested sequentially along the radial direction of the drying mechanism. The drying units are used to remove liquid droplets from the steam.
2. The drying mechanism according to claim 1, characterized in that, At least one of the drying units has a symmetrical annular cross-section, which is perpendicular to the central axis of the drying mechanism.
3. The drying mechanism according to claim 2, characterized in that, At least one of the drying units has a circular cross-section.
4. The drying mechanism according to claim 1, characterized in that, Each of the drying units is arranged coaxially.
5. The drying mechanism according to claim 1, characterized in that, The two adjacent drying units are connected to each other or are integrally formed parts.
6. The drying mechanism according to any one of claims 1 to 5, characterized in that, The drying unit includes a mounting cover and a drying body. The mounting cover is provided with an air inlet and an air outlet, which are spaced apart and connect the inside and outside of the mounting cover. The drying body is disposed inside the mounting cover and is used to remove liquid droplets from the steam.
7. The drying mechanism according to claim 6, characterized in that, The mounting cover has an outer peripheral surface, and the outer peripheral surface is provided with a plurality of spaced-apart air inlets.
8. The drying mechanism according to claim 6, characterized in that, The mounting cover has an upper surface, and the air outlet is located on the upper surface.
9. The drying mechanism according to claim 7, characterized in that, The mounting cover also has an inner circumferential surface located inside the mounting cover and distributed radially at intervals from the outer circumferential surface along the drying unit. The inner circumferential surface is inclined from the lower end to the upper end toward the side opposite to the outer circumferential surface.
10. The drying mechanism according to claim 9, characterized in that, The mounting cover includes an outer peripheral body and an inner peripheral body that are radially spaced along the drying unit. The outer peripheral surface is the outer surface of the outer peripheral body that is away from the inner peripheral body, and the inner peripheral surface is the inner surface of the inner peripheral body that is close to the outer peripheral body.
11. The drying mechanism according to claim 10, characterized in that, In two adjacent drying units, the drying unit located on the outer side is the first unit, and the drying unit located on the inner side is the second unit; the inner circumference of the first unit and the outer circumference of the second unit form an air inlet gap, which is used to allow steam to enter the second unit, and the spacing of the air inlet gap decreases from the bottom to the top.
12. The drying mechanism according to claim 10, characterized in that, The drying unit located at the center of the plurality of drying units is the central unit, and an inspection channel is formed inside the inner circumference of the central unit, and an inspection ladder is provided in the inspection channel; The inner circumference of the central unit is provided with an inspection port communicating with the inspection channel. The inner circumference of the central unit is pivotally connected to a sealing cover, which can rotate relative to the inner circumference of the central unit to open or block the inspection port.
13. The drying mechanism according to claim 12, characterized in that, The sealing cover is provided with fasteners; when the sealing cover blocks the inspection port, the fasteners are connected to the inner circumference of the central unit; when the inspection port is in the open state, the fasteners are disconnected from the inner circumference of the central unit.
14. The drying mechanism according to claim 6, characterized in that, The drying unit also includes a drain pipe located below the mounting cover and connected to the mounting cover; the drain pipes of two adjacent drying units are connected to each other.
15. A vapor-liquid separation assembly, characterized in that, The device includes a vapor-liquid separation mechanism and a drying mechanism according to any one of claims 1 to 14, wherein the vapor-liquid separation mechanism is located below the drying mechanism for separating a vapor-liquid mixture to obtain steam, and the drying mechanism is used to receive the steam and remove liquid droplets from the steam.
16. A steam generating apparatus, characterized in that, The device includes a steam generating assembly and a vapor-liquid separation assembly as described in claim 15, wherein the steam generating assembly is used to generate and output a vapor-liquid mixture, and the vapor-liquid separation assembly is used to receive the vapor-liquid mixture and separate the vapor-liquid mixture to obtain steam.