CN105841771B - Be used for gas-liquid separation and categorised measuring device of liquid flow - Google Patents
Be used for gas-liquid separation and categorised measuring device of liquid flow Download PDFInfo
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- CN105841771B CN105841771B CN201610184517.XA CN201610184517A CN105841771B CN 105841771 B CN105841771 B CN 105841771B CN 201610184517 A CN201610184517 A CN 201610184517A CN 105841771 B CN105841771 B CN 105841771B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/08—Air or gas separators in combination with liquid meters; Liquid separators in combination with gas-meters
Abstract
A device for separating vapor from liquid and classifying and measuring liquid flow comprises a horn-shaped cover (1), a simulation cavity (2), a grating sleeve (3), a cooling plate (4), a condensed liquid collecting container (5), a container side plate (5'), a collecting tank (6), a hose (7), a liquid sealing pipe (8), a collecting tank (9), a vapor return pipe (10), a pressure guide pipe (11), a liquid level meter (12) and a collecting tank (13). Separating the liquid drops entrained in the gas flow from the gas by a grid sleeve (3) and introducing the liquid drops into a designated collection tank (9) and a designated collection tank (13); and the water flow can be collected and measured in real time, and the spatial liquid drops condensed on the cold wall surface and the flow of the water film flowing along the wall surface are respectively measured.
Description
Technical Field
The invention belongs to the technical field of thermonuclear power generation, and particularly relates to a technology for measuring the space dripping ratio of steam condensate in a nuclear power station containment dome.
Background
At present, the containment is one of safety protection measures of nuclear power station realization, when a primary loop pipeline bursts in the containment, hot steam and atomized water vapor can rush into the inner space of the containment, a dome of the containment can generate condensed liquid due to cooling of the hot steam, one part of the condensed liquid can flow downwards along the inclined wall surface under the action of gravity, the other part of the condensed liquid directly drops into the inner space under the action of gravity, and liquid drops dropping into the space enter a liquid phase and form a vapor-liquid two-phase mixture. At present, no device for carrying out detailed research on the generation and change process of a vapor-liquid two-phase mixture in the inner space of the containment is available. Factors such as the flowing form of the condensate, the influence of the space dropping on the wall surface condensation heat and mass transfer boundary layer, the time for the condensate in the containment to return to the reactor core and the like all influence the safe operation of the containment and the whole reactor core system. In order to research the influence of the phenomenon on the heat transfer medium and the droplet dropping proportion, a device for performing vapor-liquid separation and fluid flow classification instant measurement in a container is designed, so that the special research on the dangerous condition generated when a passive containment vessel bursts in a pipeline is realized, the hot vapor and atomized vapor at the burst position are flushed into the containment vessel space, and the detailed research and analysis are performed on the generation and change processes of a vapor-liquid two-phase mixture.
Disclosure of Invention
The invention provides a gas-liquid separation measuring device, which is used for separating liquid drops in a condensed liquid two-phase mixture in an air flow; and respectively measuring the wall surface and the space dropping condensate on line.
The technical scheme of the invention is as follows:
the first device comprises: separation of liquid droplets in a condensed liquid two-phase mixture of the gas stream is achieved.
The first device comprises: the device comprises a horn-shaped cover, a simulation cavity, a grid sleeve, a cooling plate, a container side plate, a collecting tank, a hose, a U-shaped liquid seal pipe, a collecting tank, a steam return pipe, a pressure guide pipe, a liquid level meter and a second collecting tank.
The first device is used for simulating the generation and change process of liquid drops entering a liquid phase and forming a vapor-liquid two-phase mixture in a cavity inside the containment of the nuclear power station.
The simulation cavity of the vapor-liquid separation measuring device is a cylindrical cavity, the top and the bottom of the cylindrical body are respectively provided with a horn-shaped cover, one end of a large opening of each horn-shaped cover is welded on the top end face of the cylindrical body, one end of a small opening of each horn-shaped cover is connected with an airflow inlet, one end of a large opening of the other horn-shaped cover is welded on the bottom end face of the cylindrical body, the small opening of each horn-shaped cover is connected with an airflow outlet, the cavity is sealed and closed except the airflow inlet and outlet and is used for simulating a closed cavity of a containment vessel; the cooling plate is adhered to the side wall of the cylindrical body and the outer parts of the two ends of the cylindrical body and is used for simulating the cooling effect of the dome or the side wall of the containment vessel; a circle of container side plates are welded on the inner side wall of the cylindrical body close to the airflow outlet to form a collecting tank for collecting liquid drops flowing down from the side wall, and the bottom of the collecting tank is connected to a collecting tank through a U-shaped liquid seal pipe and a hose; a grid sleeve with grid baffles arranged in a staggered mode is welded on a side plate of a container in the simulated cavity of the vapor-liquid separation measuring device, the grid baffles of the grid sleeve are provided with inclination angles, and when the vapor-liquid separation measuring device is erected vertically, liquid drops dropping on the grid baffles can flow from one step of baffle to the other step of baffle towards one side and flow to the side wall, and cannot flow into the grid sleeve from a grid gap. The airflow inlet is communicated with the airflow outlet from the interior of the grille cover through the grille slits in the grille baffle plate. After airflow carrying liquid drops enters the cavity from the airflow inlet at a high speed, the airflow can impact the staggered grid baffle plate under the action of inertia, the airflow can bypass the grid baffle plate and flow out from a grid gap, the liquid drops impact the grid baffle plate under the action of gravity and then can be adsorbed on the grid baffle plate, flow to the inner side wall of the cylindrical body along the grid baffle plate under the action of gravity, are collected by a collecting tank formed by a side plate of the container, and are connected to one of the collecting tanks together with the liquid drops flowing down from the side wall through a liquid seal pipe and a hose, so that the vapor-liquid separation measurement of the liquid drops in the airflow is realized, and the number of the specifically collected liquid drops is recorded by a liquid level meter in the collecting tank.
The vapor-liquid separation and liquid flow classification measuring device also comprises a condensation liquid collecting container, another set of hose, a liquid seal pipe, a vapor return pipe, a pressure guide pipe, a liquid level meter and a second collecting tank; and a circle of container side plates are welded on the inner side wall of the cylindrical body near the airflow outlet to form a collecting tank, and a condensation liquid collecting container is arranged on one side of each container side plate and is connected to the second collecting tank through another set of liquid sealing pipe and a hose.
A second device: the wall surface and the space dropping condensed liquid are respectively measured on line.
The second device comprises a horn-shaped cover, a simulation cavity, a grating sleeve in which grating baffles are arranged in a staggered manner, a cooling plate, a condensate collecting container, a container side plate, a collecting tank, a hose, a U-shaped liquid seal pipe, a collecting tank, a steam return pipe, a pressure guide pipe, a liquid level meter and another collecting tank.
And the second device is used for simulating the internal cavity of the containment of the nuclear power station to respectively measure the wall surface and the condensed liquid dripped from the space on line. The simulation cavity of the vapor-liquid separation measuring device is a cylindrical cavity, the top and the bottom of the cylindrical body are respectively provided with a horn-shaped cover, one end of a large opening of each horn-shaped cover is welded on the end surface of the cylindrical body, a small opening at one end is connected with an airflow inlet, a small opening at the other end is connected with an airflow outlet, the cavity is sealed and closed outside the airflow inlet and outlet and is used for simulating a closed cavity of a containment vessel; the cooling plate is adhered to the side wall of the cylindrical body and the outer parts of the two ends of the cylindrical body and is used for simulating the cooling effect of the dome or the side wall of the containment vessel; and a circle of container side plates are welded on the inner side wall of the cylindrical body near the airflow outlet to form a collecting tank for collecting liquid drops flowing down from the side wall, and the bottom of the collecting tank is connected to the second collecting tank through a hose and a U-shaped liquid seal pipe. When the gas-liquid separation measuring device is erected vertically, liquid drops dropping on the grid baffle can flow from one step baffle to the other step baffle towards one side and flow to the side wall, and cannot flow into the grid sleeve from the grid gap. The airflow entering from the airflow inlet must pass through the grid slits in the grid baffle plate to flow into the interior of the grid sleeve and reach the airflow outlet. When airflow carrying liquid drops enters the cavity from the airflow inlet at a high speed, the airflow can impact the staggered grid baffle plate under the action of inertia, the airflow can bypass the grid baffle plate and flow out from the grid gap, the liquid drops impact the grid baffle plate under the action of gravity and then can be adsorbed on the grid baffle plate, flow to the inner side wall of the cylindrical body along the grid baffle plate under the action of gravity, are collected by a collecting tank formed by a side plate of the container, and are connected to one of the collecting tanks together with the liquid drops flowing down from the side wall through a U-shaped liquid seal pipe and a hose, and the specific quantity of the collected liquid drops is recorded by a liquid level meter in one of the collecting tanks.
The nuclear power station containment is arranged on the other side of the container side plate in the cavity, a condensate collecting container in unit area is further arranged, and a liquid level meter is arranged in the condensate collecting container and used for recording the liquid level change condition in the condensate collecting container on line. The quantity of the condensed liquid collected by the condensed liquid collecting container is multiplied by the area of the dome, and the measured data is the online measured data of the condensed liquid directly dropping from the top to the space inside the containment dome of the nuclear power station in an accident.
The collection tank collects the condensate generated by the simulated nuclear power station containment dome, the condensate flows from the side wall and directly drips from the dome to form a space, the cavity surface heat dissipation loss of the vapor-liquid separation measuring device can be evaluated according to the total flow of the condensate, and the comparison verification is formed between the heat dissipation loss and the heat dissipation loss measured on the heat preservation layer on the outer side of the cavity of the vapor-liquid separation measuring device. Therefore, a curve graph of the two-phase mixture of the condensed liquid in the airflow inside the cavity of the vapor-liquid separation measuring device at different temperatures and humidities can be obtained, and different heat and mass transfer characteristics of relatively dry steam and saturated steam can be calculated to determine the heat dissipation characteristics of the dome and the side wall of the containment of the nuclear power station. For the liquid level measurement in the pressurized steam pipeline, the liquid level measurement is realized by adopting a liquid level collection technology and arranging a liquid level meter under a lower elevation.
The invention has the following advantages and prominent effects: the structure of the grid type vapor-liquid separation device can separate liquid drops carried in the gas flow with gas and lead the liquid drops into a designated collecting tank. The liquid seal device and the gas return device can be used for collecting and measuring water flow in real time. The traditional drain valve technology adopts an intermittent opening and closing principle, pressure fluctuation in a pipeline is easy to be large when the drain valve is opened, and accordingly flow is influenced, and the liquid seal technology solves the problem. The scheme of low-level arrangement, water filling and pressure guiding of the liquid level meter can be used for accurately measuring the liquid level in the pressure-bearing container. The device can be applied to research of the critical inclination angle of water drop at the dome position of the containment and the proportion of the condensed water drop at different inclination angles.
Drawings
FIG. 1 is a schematic diagram of a device for separating droplets from a two-phase mixture of a coagulation liquid;
FIG. 2 shows one of the respective measuring devices for wall and space dripping condensates;
FIG. 3 is a second schematic view of a device for measuring the amount of the condensate dripping on the wall and space, respectively;
FIG. 4 is a third schematic view of a device for measuring the amount of the condensate dripping from the wall and the space.
Description of the drawings: 1-a horn-shaped cover; 2-simulating a cavity; 3-a grid sleeve; 4-a cooling plate; 5-a condensate collection container; 5' -a container side panel; 6-collecting tank; 7-a hose; 8-U type liquid seal pipe; 9-a second collection tank; 10-a steam return pipe; 11-a pressure guiding pipe; 12-a liquid level meter; 13-collecting tank.
Detailed Description
Example 1: respectively measuring the wall surface and the space dropping condensate;
before the operation of the gas-liquid separation measuring device, flushing water into the second collecting tank 9 and the collecting tank 13 until the water liquid level is increased to be higher than the elevation position of the liquid level meter 12; enough water is filled into the pressure guiding pipe 11 from the joint of the steam return pipe 10, so that the pressure guiding pipe 11 on the side wall of the collecting tank is completely filled with cooling water. Opening an air inlet valve, when the steam and air mixture flows into the steam-liquid separation measuring device from the horn-shaped cover 1 of the airflow inlet, the steam is condensed on the inner surface of the cooling plate 4, and a part of water flows downwards along the side wall of the simulation cavity 2 under the influence of gravity, surface tension, dirt, surface unevenness and other factors, and the water flowing along the side wall of the simulation cavity 2 flows into the collecting tank 6; the other part of water drops in the form of liquid drops, and one part of water flows along with the air flow or drops on the side plate 5' of the container; the small liquid drops dropping from the space flow onto the grid type baffle of the grid sleeve 3 along with the air flow, and the air flow easily bypasses the grid sleeve 3 due to the small air density and the good compressibility and flows out through the air flow outlet of the lower horn-shaped cover 1. Because the inertia and the density of the water drops are larger, the water drops can hit the grid baffle plate of the grid sleeve 3 and then can be adsorbed on the grid baffle plate, flow to the inner side wall of the cylindrical body along the grid baffle plate under the action of gravity, are collected by the collecting tank 6 formed by the side plate 5' of the container, and are connected to the collecting tank 13 together with the liquid drops flowing down from the side wall through the U-shaped liquid seal pipe 8 and the hose 7; a part of the drops in the space can fall into a condensate collecting container 5 arranged on a side plate 5' of the container and is connected to a second collecting tank 9 through a U-shaped liquid seal pipe 8 and a hose 7; along with the increase of the liquid level of the water in the collecting water tank 6 and the condensate collecting container 5, the downstream U-shaped liquid seal pipe 8 is filled with water, so that the air flow liquid seal is realized, the water which continuously flows down from the side wall of the simulation cavity 2 after the liquid seal flows into the cooling water collecting tank 13, the water level in the cooling water collecting tank 13 is continuously increased, the water pressure difference in the pressure guide pipes at the two sides of the liquid level meter 12 is reduced along with the increase of the liquid level, and the flow of the condensed water in each collecting tank can be directly measured according to the direct proportion of the water pressure difference and the liquid level height.
Example 2: performing condensation heat exchange research on a containment dome;
before the operation of the gas-liquid separation measuring device, flushing water into the second collecting tank 9 and the collecting tank 13 until the water liquid level is increased to be higher than the elevation position of the liquid level meter 12; enough water is filled into the pressure guiding pipe 11 from the joint of the steam return pipe 10, so that the pressure guiding pipe 11 on the side wall of the collecting tank is completely filled with cooling water. Opening an air inlet valve, when the steam and air mixture flows into the steam-liquid separation measuring device from the horn-shaped cover 1 of the airflow inlet, the steam is condensed on the inner surface of the cooling plate 4, and a part of water flows downwards along the side wall of the simulation cavity 2 under the influence of gravity, surface tension, dirt, surface unevenness and other factors, and the water flowing along the side wall of the simulation cavity 2 flows into the collecting tank 6; the other part of water drops in the form of liquid drops, and one part of water flows along with the air flow or drops on the side plate 5' of the container; the small liquid drops dropping from the space flow onto the grid type baffle of the grid sleeve 3 along with the air flow, and the air flow easily bypasses the grid sleeve 3 due to the small air density and the good compressibility and flows out through the air flow outlet of the lower horn-shaped cover 1. Because the inertia and the density of the water drops are larger, the water drops can hit the grid baffle plate of the grid sleeve 3 and then can be adsorbed on the grid baffle plate, flow to the inner side wall of the cylindrical body along the grid baffle plate under the action of gravity, are collected by the collecting tank 6 formed by the side plate 5' of the container, and are connected to the collecting tank 13 together with the liquid drops flowing down from the side wall through the U-shaped liquid seal pipe 8 and the hose 7; a part of the drops in the space can fall into a condensate collecting container 5 arranged on a side plate 5' of the container and is connected to a second collecting tank 9 through a U-shaped liquid seal pipe 8 and a hose 7; along with the increase of the liquid level of the water in the collecting water tank 6 and the condensate collecting container 5, the downstream U-shaped liquid seal pipe 8 is filled with water, so that the air flow liquid seal is realized, the water which continuously flows down from the side wall of the simulation cavity 2 after the liquid seal flows into the cooling water collecting tank 13, the water level in the cooling water collecting tank 13 is continuously increased, the water pressure difference in the pressure guide pipes at the two sides of the liquid level meter 12 is reduced along with the increase of the liquid level, and the flow of the condensed water in each collecting tank can be directly measured according to the fact that the water pressure difference is in direct proportion to the liquid level height. The condensation water quantity can be converted into a heat exchange numerical value through the condensation factor, and the influence of the dryness of the steam and air mixture on the heat exchange numerical value can be effectively researched. The quantity of the condensate which flows downwards from the side wall of the simulation cavity 2 and the quantity of the condensate which directly drips from the space in unit area can be obtained by respectively measuring the quantities of the condensate in the second 9 and the 13 collecting tanks, and the quantity of the condensate which directly drips from the space in unit time in the steam with different dryness of the nuclear power station containment dome can be obtained by multiplying the quantity of the condensate by the quantity of the area of the nuclear power station containment dome.
Claims (1)
1. The device for vapor-liquid separation and liquid flow classification measurement is provided with a simulation cavity (2), a cooling plate (4), a container side plate (5'), a collecting tank (6) and a collecting tank (13), and is characterized by further comprising a horn-shaped cover (1), a grid sleeve (3), a hose (7), a U-shaped liquid sealing pipe (8), a vapor return pipe (10), a pressure guide pipe (11) and a liquid level meter (12); the simulation cavity (2) is a cylindrical cavity, the top and the bottom of the cylindrical cavity are respectively provided with a horn-shaped cover (1), one end of a large opening of the horn-shaped cover (1) is welded on the top end face of the cylindrical body, a small opening is connected with an airflow inlet, one end of a large opening of the other horn-shaped cover (1) is welded on the bottom end face of the cylindrical body, the small opening is connected with an airflow outlet, and the cavity is sealed and closed except the airflow inlet and outlet; the cooling plate (4) is stuck to the side wall of the cylinder body and the outer parts of the two ends; a circle of container side plates (5') are welded on the inner side wall of the columnar body near the airflow outlet to form a collecting tank (6), and the bottom of the collecting tank (6) is connected to a collecting tank (13) through a U-shaped liquid seal pipe (8) and a hose (7); a grating sleeve (3) with a grating baffle arranged in a staggered manner is welded on the side plate (5') of the inner container of the simulated cavity (2), and the grating baffle of the grating sleeve (3) has an inclination angle; the airflow inlet is communicated with the airflow outlet from the interior of the grating sleeve through the grating slits in the grating baffle;
the condensation liquid collecting container (5) is additionally provided with a set of second flexible pipe, a second liquid seal pipe, a second vapor return pipe, a second pressure leading pipe, a second liquid level meter and a second collecting tank (9); a circle of container side plates (5 ') are welded on the inner side wall of the columnar body near the airflow outlet to form a collecting tank (6), a condensate collecting container (5) is arranged on one side of the container side plates (5'), and the condensate collecting container (5) is connected to a second collecting tank (9) through another set of second liquid-sealed pipes and second flexible pipes.
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| CN201610184517.XA CN105841771B (en) | 2016-03-28 | 2016-03-28 | Be used for gas-liquid separation and categorised measuring device of liquid flow |
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| CN201610184517.XA CN105841771B (en) | 2016-03-28 | 2016-03-28 | Be used for gas-liquid separation and categorised measuring device of liquid flow |
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| CN105841771B true CN105841771B (en) | 2022-03-25 |
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| CN108844592A (en) * | 2018-04-11 | 2018-11-20 | 西安交通大学 | A kind of condensed fluid collection measuring device and method based on pressure difference measuring signal |
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| CA1201789A (en) * | 1983-12-19 | 1986-03-11 | Murphy Oil Company Limited | Metering separator for determining the liquid mass flow rate in a gas-liquid oilfield production stream |
| KR20040043138A (en) * | 2004-02-07 | 2004-05-22 | 윤장식 | centurifugal type air purification apparatus |
| CN100434870C (en) * | 2006-02-07 | 2008-11-19 | 俞洪燕 | Gas-liquid polyphase flow separating rectifying device and measurement device thereof |
| CN101700450A (en) * | 2009-11-13 | 2010-05-05 | 核电秦山联营有限公司 | Containment filtration exhaust system |
| EP2562541A1 (en) * | 2011-08-23 | 2013-02-27 | Siemens Aktiengesellschaft | High precision detection of the volume proportion of a component in a multicomponent fluid |
| CN102562028A (en) * | 2012-02-16 | 2012-07-11 | 大庆圣坤石油技术服务有限公司 | Automatic continuous oil measuring device of U-shaped tube integrator |
| US9176000B2 (en) * | 2013-04-15 | 2015-11-03 | General Electric Company | System for measurement of fluid levels in multi-phase fluids |
| CN203862048U (en) * | 2014-05-19 | 2014-10-08 | 中国石油大学(华东) | Liquid drop collection measuring device |
| CN205642511U (en) * | 2016-03-28 | 2016-10-12 | 中国人民解放军92609部队 | Be used for categorised measuring device of vapor -liquid separation and liquid flow |
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