CN217855401U - High-temperature gas cooled reactor graphite and carbon reactor internal member vacuumizing, heating and dehumidifying device - Google Patents
High-temperature gas cooled reactor graphite and carbon reactor internal member vacuumizing, heating and dehumidifying device Download PDFInfo
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- CN217855401U CN217855401U CN202221112048.8U CN202221112048U CN217855401U CN 217855401 U CN217855401 U CN 217855401U CN 202221112048 U CN202221112048 U CN 202221112048U CN 217855401 U CN217855401 U CN 217855401U
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Abstract
The utility model provides a graphite, carbon reactor internals evacuation and heating dehydrating unit are piled to high temperature gas cooling, including pressure vessel, steam generator, accident cooling dehydrating unit and normal purifier, pressure vessel passes through hot helium pipe connection steam generator's casing, and the helium fan is installed on steam generator's casing upper portion, and steam generator's casing passes through pipeline parallel connection accident cooling dehydrating unit and the normal purifier who contains the molecular sieve bed, and steam generator's casing still is connected with a return circuit evacuating device. The device can effectively remove the water absorbed by the graphite and carbon reactor internal components of the high-temperature gas cooled reactor, lays a foundation for subsequent unit debugging tests, and can effectively reduce the impurity content of the coolant after the high-temperature gas cooled reactor is loaded.
Description
Technical Field
The utility model relates to a reactor dehumidification technical field especially relates to a high temperature gas cooled piles interior component evacuation and heating dehydrating unit of graphite, carbon.
Background
The high-temperature gas cooled reactor nuclear power station is used as a novel reactor with the fourth generation nuclear power characteristic, helium is used as a coolant in a primary loop of the reactor, the reactor contains graphite and carbon reactor internals, and the graphite and the carbon reactor internals adsorb a certain amount of water in the air in the installation stage, and the water needs to be analyzed and removed in a heating mode during a thermal state function test.
Disclosure of Invention
An object of the utility model is to provide a high temperature gas cooled piles interior component evacuation and heating dehydrating unit for solve graphite, the carbon that contain in the high temperature gas cooled reactor primary circuit and pile interior component dehumidification problem.
The embodiment of the application provides a high temperature gas cooled piles interior member evacuation and heating dehydrating unit, including pressure vessel, steam generator, accident cooling dehydrating unit and normal purifier, pressure vessel passes through hot helium pipe connection steam generator's casing, and main helium fan is installed on steam generator's casing upper portion, and steam generator's casing passes through pipeline parallel connection accident cooling dehydrating unit and the normal purifier who contains the molecular sieve bed, and steam generator's casing still is connected with a return circuit evacuating device.
In some embodiments, the accident cooling and dehumidifying device comprises a main pipeline, a primary water helium cooler, a secondary water helium cooler, a gas-water separator, a gas flow meter and a regulating valve, wherein one end of the main pipeline is connected to a shell outlet of the steam generator, the other end of the main pipeline is connected to a shell inlet of the steam generator, the primary water helium cooler, the secondary water helium cooler, the gas-water separator, the gas flow meter and the regulating valve are sequentially connected in the direction from the shell outlet of the steam generator to the shell inlet of the steam generator through the main pipeline, and the normal purification device is connected in parallel on the main pipeline.
In some embodiments, the normal purification device comprises a purification pipeline, a copper oxide bed, a molecular sieve bed and a low-temperature adsorber, wherein the copper oxide bed, the molecular sieve bed and the low-temperature adsorber are sequentially connected in series through the purification pipeline, two ends of the purification pipeline are both connected to the main pipeline, the copper oxide bed is connected to one end, close to the outlet of the shell of the steam generator, the low-temperature adsorber is connected to one end, close to the inlet of the shell of the steam generator, of the low-temperature adsorber, and the molecular sieve bed is connected between the copper oxide bed and the low-temperature adsorber.
In some embodiments, the primary circuit vacuum extractor is a plurality of vacuum pumps connected in parallel with each other.
In some embodiments, there are three vacuum pumps.
In some embodiments, the vacuum pump is a worm vacuum pump.
In some embodiments, a stop valve is provided at both ends of the purge line, a stop valve is provided on the main line between the purge line and the primary water helium cooler, and a stop valve is provided on the main line between the purge line and the regulating valve.
In some embodiments, humidity measuring devices are provided at both the outlet and the inlet of the gas-water separator.
In some embodiments, a dew point hygrometer is installed at the outlet of each of the vacuum pumps.
In some embodiments, the gas flow meter is a vortex street gas flow meter.
The utility model has the advantages that:
(1) The device can effectively remove the water absorbed by the graphite and carbon reactor internal components of the high-temperature gas cooled reactor, lays a foundation for subsequent unit debugging tests, and can effectively reduce the impurity content of the coolant after the high-temperature gas cooled reactor is loaded.
(2) Accident cooling dehydrating unit and normal purifier can cooperate the use, and when the moisture in a reactor return circuit can't get rid of completely through accident cooling dehydrating unit, continue the dehumidification through throwing into normal purifier, can guarantee the dehumidification effect.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent from and readily appreciated by reference to the following description of the embodiments taken in conjunction with the accompanying drawings,
wherein:
FIG. 1 is a schematic structural diagram of a high temperature gas cooled reactor graphite and carbon reactor internals vacuumizing and heating dehumidification device in an embodiment of the present invention;
reference numerals:
1-a pressure vessel; 2-a steam generator; 3-a helium circulator; 4-a first stop valve; 5-a third stop valve; 6-main pipeline; 7-adjusting valve; 8-first-stage water helium cooler; 9-secondary water helium cooler; 10-gas-water separator; 11-vortex street gas flow meter; 12-a purge line; 13-a molecular sieve bed; 14-a fourth stop valve; 15-a low temperature adsorber; 16-a second stop valve; 17-a copper oxide bed; 18-vacuum pump.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The high temperature gas cooled reactor graphite, carbon reactor inner member vacuumizing and heating dehumidifying device according to the embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1, an embodiment of the present invention provides a device for evacuating, heating and dehumidifying graphite and carbon reactor internals of a high temperature gas cooled reactor, including a reactor primary circuit, an accident cooling and dehumidifying device, a normal purification device, and a primary circuit evacuating device, where the reactor primary circuit includes a pressure vessel 1, a steam generator 2, and a hot helium conduit, and the pressure vessel 1 is connected to a shell of the steam generator 2 through the hot helium conduit. The pressure vessel 1 contains graphite and carbon reactor internals, which are reactor neutron moderating media. The upper part in the shell of the steam generator 2 is provided with a main helium fan 3, and the main helium fan 3 is a power device for the helium medium in a loop of the reactor to circularly flow and is a single-stage centrifugal fan.
The shell of the steam generator 2 is connected with the accident cooling and dehumidifying device and the normal purifying device in parallel through a pipeline, and the shell of the steam generator 2 is also connected with a loop vacuumizing device.
Wherein, accident cooling dehydrating unit includes main line 6, one-level water helium cooler 8, second grade water helium cooler 9, gas-water separator 10, vortex street formula gas flowmeter 11 and governing valve 7, the one end of main line 6 is connected in steam generator 2's shell outlet, the other end of main line 6 is connected in steam generator 2's shell inlet, the direction from steam generator 2's shell outlet to steam generator 2's shell inlet connects gradually one-level water helium cooler 8 through main line 6, second grade water helium cooler 9, gas-water separator 10, vortex street formula gas flowmeter 11 and governing valve 7, normal purifier of parallel connection on main line 6. Humidity measuring devices are arranged at the outlet and the inlet of the gas-water separator 10. The primary water helium cooler 8 and the secondary water helium cooler 9 are different in size and cooling amount, the size and cooling amount of the primary water helium cooler 8 are larger than those of the secondary water helium cooler 9, the cooling work of the whole system is mostly completed by the primary water helium cooler 8, and the primary water helium cooler 8 generally adopts cheap and readily available equipment cooling water, so that the system has good economy. The secondary water helium cooler 9 further cools the gas exiting the primary water helium cooler 8.
The accident cooling and dehumidifying device has the main functions that helium medium is cooled through the two-stage cooler, moisture in the helium is condensed and separated from the helium in the separator to be dehumidified, and the helium returns to a loop of the reactor again, so that the aim of circular drying is fulfilled.
Normal purifier includes the purge line 12, copper oxide bed 17, molecular sieve bed 13 and low temperature adsorber 15 are through purge line 12 series connection in proper order, the both ends of purge line 12 are all connected in main line 6, copper oxide bed 17 connects in the shell outlet one end that is close to steam generator 2, low temperature adsorber 15 connects in the shell inlet one end that is close to steam generator 2, molecular sieve bed 13 connects between copper oxide bed 17 and low temperature adsorber 15. The main function of the normal purification device is to remove moisture and carbon dioxide by adsorption.
The molecular sieve bed 13 is a 5A molecular sieve bed. The molecular sieve bed 13 is a cylinder filled with molecular sieve, and the 5A molecular sieve bed is a cylinder filled with 5A molecular sieve. The 5A molecular sieve is a chemical substance with a molecular formula of 3/4 CaO.1/4 Na 2 O·Al 2 O 3 ·2SiO 2 ·9/2H 2 And O. The 5A molecular sieves can adsorb any molecules smaller than this pore size and are generally referred to as calcium molecular sieves. It has the functions of 3A and 4A molecular sieves and can adsorb C 3 —C 4 The normal alkane, chloroethane, bromoethane, butanol and the like can be applied to normal and isomeric hydrocarbon separation, pressure swing adsorption separation and co-adsorption of water and carbon dioxide.
The 5A molecular sieve bed comprises a vertical bed and a horizontal bed, wherein the vertical bed is compact in volume, the bed layer of the vertical bed is usually higher, and the occupied area is small. Horizontal beds and vertical beds are also cylindrical, and the advantage of horizontal beds is that the gas flow is evenly distributed. The vertical bed or the horizontal bed can be selected according to actual needs.
The primary circuit vacuumizing device is 3 vacuum pumps 18 which are connected in parallel, the vacuum pumps 18 are worm vacuum pumps 18, and a dew point type humidity meter is installed at the outlet of each vacuum pump 18 and used for measuring the humidity at the outlet of the vacuum pump 18. The primary loop vacuumizing device has the functions of vacuumizing air in a primary loop of the reactor, replacing the primary loop of the reactor with helium, vacuumizing to play a role in dehumidification, and removing trace moisture due to vacuum diffusion.
The two ends of the purifying pipeline 12 are provided with stop valves, the stop valves comprise a first stop valve 4 and a second stop valve 16 and are used for controlling the opening and closing of a normal purifying device, a third stop valve 5 is arranged between the purifying pipeline 12 and the first-level water helium cooler 8 on the main pipeline 6, and a fourth stop valve 14 is arranged between the purifying pipeline 12 and the regulating valve 7 on the main pipeline 6 and is used for controlling the opening and closing of the accident cooling and dehumidifying device.
The embodiment also provides a method for vacuumizing, heating and dehumidifying the high-temperature gas cooled reactor graphite and carbon reactor internal components, which comprises the following specific implementation steps:
1) Vacuumizing and dehumidifying a primary loop of the reactor:
a loop vacuumizing device is used for vacuumizing a closed reactor loop, the vacuum state of the reactor loop is maintained, and water contained in the graphite and carbon reactor internal components volatilizes to the vacuum environment in the vacuum environment and is pumped out by a worm vacuum pump 18.
2) Measuring the vacuumizing exhaust humidity:
the dew point type humidity meter for measuring the humidity is utilized to measure the exhaust humidity at the outlet of a primary loop vacuum pumping system, and when the measured humidity is lower than the ambient air humidity and no liquid condensed water is discharged from the outlet of the vacuum pump 18, the humidity measurement can be finished.
3) A certain amount of helium is filled into a primary loop of the reactor:
a certain amount of high-purity helium is filled into a loop of the reactor by utilizing purchased helium or a helium storage system in a factory, specifically, the helium is filled into the pressure container 1, so that the loop of the reactor is converted into a positive pressure state from a vacuum state.
4) The helium circulator 3 is started, and the accident cooling and dehumidifying device dehumidifies:
starting the primary helium fan 3, converting electric energy into heat energy and mechanical energy by the primary helium fan 3, heating helium in a primary loop of the reactor to 250 ℃, heating graphite and carbon reactor internals by the hot helium to evaporate water contained in the graphite and carbon reactor internals into a helium atmosphere, enabling the helium carrying water vapor to flow through the accident cooling and dehumidifying device under the driving of a pressure head of the primary helium fan 3, condensing the water vapor into liquid water under the action of a primary water helium cooler 8 and a secondary water helium cooler 9, removing the liquid water when the water vapor flows through a gas-water separator 10, and returning the dried helium to the primary loop of the reactor again. Helium humidity is measured at the inlet and outlet of the moisture separator 10 and the process can be terminated when the outlet humidity does not drop significantly from the inlet humidity.
5) And (3) continuously dehumidifying by the normal purification device:
when the moisture content in the primary loop of the reactor cannot be continuously removed under the action of the accident cooling and dehumidifying device, the accident cooling and dehumidifying device is isolated, the normal purifying device is put into use, and the molecular sieve bed 13 in the normal purifying device is utilized to continuously adsorb and dehumidify until the dehumidification is finished.
The invention is further described below by means of specific examples.
Example 1
Only the accident cooling and dehumidifying device is needed for dehumidification. The specific implementation steps are as follows:
1) Vacuumizing and dehumidifying a primary loop of the reactor:
a loop vacuumizing device is used for vacuumizing a closed reactor loop, the vacuum state of the reactor loop is maintained, and water contained in the graphite and carbon reactor internal components volatilizes to the vacuum environment in the vacuum environment and is pumped out by a worm vacuum pump 18.
2) Measuring the vacuumizing exhaust humidity:
the dew point type humidity meter for measuring the humidity is utilized to measure the exhaust humidity at the outlet of a primary loop vacuum pumping system, and when the measured humidity is lower than the ambient air humidity and no liquid condensed water is discharged from the outlet of the vacuum pump 18, the humidity measurement can be finished.
3) A reactor primary loop is filled with a certain amount of helium:
a certain amount of high-purity helium is filled into a loop of the reactor by utilizing purchased helium or a helium storage system in a factory, specifically, the helium is filled into the pressure container 1, so that the loop of the reactor is converted into a positive pressure state from a vacuum state.
4) The helium circulator 3 is started, and the accident cooling and dehumidifying device dehumidifies:
the first stop valve 4 and the second stop valve 16 are closed, the third stop valve 5 and the fourth stop valve 14 are opened, and the emergency cooling and dehumidifying device is used. Starting the primary helium fan 3, converting electric energy into heat energy and mechanical energy by the primary helium fan 3, heating helium in a primary loop of the reactor to 250 ℃, heating graphite and carbon reactor internals by the hot helium to evaporate water contained in the graphite and carbon reactor internals into a helium atmosphere, enabling the helium carrying water vapor to flow through the accident cooling and dehumidifying device under the driving of a pressure head of the primary helium fan 3, condensing the water vapor into liquid water under the action of a primary water helium cooler 8 and a secondary water helium cooler 9, removing the liquid water when the water vapor flows through a gas-water separator 10, and returning the dried helium to the primary loop of the reactor again. Helium humidity is measured at the inlet and outlet of the moisture separator 10 and the process can be terminated when the outlet humidity does not significantly decrease from the inlet humidity.
Example 2
The emergency cooling dehumidification device and the normal purification device are matched with dehumidification. The specific implementation steps are as follows:
1) Vacuumizing and dehumidifying a primary loop of the reactor:
a loop vacuumizing device is used for vacuumizing a closed loop of the reactor, the vacuum state of the loop of the reactor is maintained, and water contained in the graphite and carbon reactor internal components volatilizes to the vacuum environment in the vacuum environment and is pumped out by a worm vacuum pump 18.
2) Measuring the vacuumizing exhaust humidity:
the dew-point hygrometer for measuring humidity is used for measuring the exhaust humidity at the outlet of a loop vacuum pumping system, and when the measured humidity is lower than the ambient air humidity and no liquid condensed water is discharged from the outlet of the vacuum pump 18, the humidity measurement can be finished.
3) A certain amount of helium is filled into a primary loop of the reactor:
a certain amount of high-purity helium is filled into a loop of the reactor by utilizing purchased helium or a helium storage system in a factory, specifically, the helium is filled into the pressure container 1, so that the loop of the reactor is converted into a positive pressure state from a vacuum state.
4) The helium circulator 3 is started, and the accident cooling and dehumidifying device dehumidifies:
the first stop valve 4 and the second stop valve 16 are closed, the third stop valve 5 and the fourth stop valve 14 are opened, and the emergency cooling and dehumidifying device is used. Starting the primary helium fan 3, converting electric energy into heat energy and mechanical energy by the primary helium fan 3, heating helium in a primary loop of the reactor to 250 ℃, heating graphite and carbon reactor internals by the hot helium to evaporate water contained in the graphite and carbon reactor internals into a helium atmosphere, enabling the helium carrying water vapor to flow through the accident cooling and dehumidifying device under the driving of a pressure head of the primary helium fan 3, condensing the water vapor into liquid water under the action of a primary water helium cooler 8 and a secondary water helium cooler 9, removing the liquid water when the water vapor flows through a gas-water separator 10, and returning the dried helium to the primary loop of the reactor again. The helium humidity is measured at the inlet and the outlet of the gas-water separator 10, and after a period of time, if the humidity of the outlet is still obviously reduced compared with the humidity of the inlet, which indicates that the moisture content in the primary loop of the reactor cannot be continuously removed under the action of the accident cooling and dehumidifying device, a normal purifying device is required to be put into the reactor.
5) And (3) continuously dehumidifying by the normal purification device:
and closing the third stop valve 5 and the fourth stop valve 14, opening the first stop valve 4 and the second stop valve 16, isolating the emergency cooling and dehumidifying device, putting the normal purifying device into use, and continuing to adsorb and dehumidify by using the molecular sieve bed 13 in the normal purifying device until dehumidification is finished.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a high temperature gas cooled piles graphite, carbon reactor internals evacuation and heating dehydrating unit, its characterized in that includes pressure vessel, steam generator, accident cooling dehydrating unit and normal purifier, pressure vessel passes through hot helium pipe connection steam generator's casing, and main helium fan is installed on steam generator's casing upper portion, and steam generator's casing passes through pipeline parallel connection accident cooling dehydrating unit and the normal purifier who contains the molecular sieve bed, and steam generator's casing still is connected with a return circuit evacuating device.
2. The high temperature gas cooled reactor graphite, carbon reactor internals evacuating and heating dehumidification device according to claim 1, wherein the accident cooling dehumidification device comprises a main pipeline, a primary water helium cooler, a secondary water helium cooler, a gas-water separator, a gas flow meter and a regulating valve, wherein one end of the main pipeline is connected to a shell outlet of the steam generator, the other end of the main pipeline is connected to a shell inlet of the steam generator, the primary water helium cooler, the secondary water helium cooler, the gas-water separator, the gas flow meter and the regulating valve are sequentially connected through the main pipeline from the shell outlet of the steam generator to the shell inlet of the steam generator, and a normal purification device is connected in parallel on the main pipeline.
3. The device of claim 2, wherein the normal purification device comprises a purification pipeline, a copper oxide bed, a molecular sieve bed and a low-temperature adsorber, the copper oxide bed, the molecular sieve bed and the low-temperature adsorber are sequentially connected in series through the purification pipeline, two ends of the purification pipeline are connected to the main pipeline, the copper oxide bed is connected to one end of the shell close to the steam generator, the low-temperature adsorber is connected to one end of the shell close to the steam generator, and the molecular sieve bed is connected between the copper oxide bed and the low-temperature adsorber.
4. The high temperature gas cooled reactor graphite, carbon reactor internals evacuating and heating dehumidification device according to any one of claims 1 to 3, wherein the primary evacuating device is a plurality of vacuum pumps connected in parallel.
5. The device for evacuating, heating and dehumidifying a graphite and carbon reactor internals according to claim 4, wherein three vacuum pumps are provided.
6. The apparatus of claim 4, wherein the vacuum pump is a worm-gear vacuum pump.
7. The apparatus of claim 3, wherein the purge line has stop valves at both ends thereof, the stop valve is disposed between the purge line and the first-stage helium cooler, and the stop valve is disposed between the purge line and the control valve.
8. The device for evacuating, heating and dehumidifying a graphite and carbon reactor internals for high temperature gas cooled reactor according to claim 2, wherein humidity measuring devices are installed at an outlet and an inlet of the gas-water separator.
9. The apparatus of claim 4, wherein a dew-point hygrometer is installed at an outlet of each of the vacuum pumps.
10. The high temperature gas cooled reactor graphite, carbon reactor internals evacuating and heating dehumidification device according to claim 2, wherein the gas flow meter is a vortex street gas flow meter.
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| CN202221112048.8U CN217855401U (en) | 2022-05-09 | 2022-05-09 | High-temperature gas cooled reactor graphite and carbon reactor internal member vacuumizing, heating and dehumidifying device |
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| CN202221112048.8U CN217855401U (en) | 2022-05-09 | 2022-05-09 | High-temperature gas cooled reactor graphite and carbon reactor internal member vacuumizing, heating and dehumidifying device |
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