CN119934802A - Nuclear power steam generator secondary side rapid drying equipment and method - Google Patents
Nuclear power steam generator secondary side rapid drying equipment and method Download PDFInfo
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- CN119934802A CN119934802A CN202510096259.9A CN202510096259A CN119934802A CN 119934802 A CN119934802 A CN 119934802A CN 202510096259 A CN202510096259 A CN 202510096259A CN 119934802 A CN119934802 A CN 119934802A
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Abstract
The invention discloses a quick drying device and a quick drying method for a secondary side of a nuclear power steam generator, wherein the quick drying device for the secondary side of the nuclear power steam generator comprises an air compressor, an air heating device and an air distributor which are sequentially connected, the air distributor is connected with a secondary side eye hole of the nuclear power steam generator through a plurality of pipelines so as to input heating air to the secondary side of the nuclear power steam generator, the quick drying device for the secondary side of the nuclear power steam generator further comprises a plurality of dew point temperature probes and a drying monitoring device connected with the dew point temperature probes, the dew point temperature probes are respectively arranged in the secondary side eye hole of the nuclear power steam generator, and the dew point temperature probes are used for feeding dew point temperature information back to the drying monitoring device in real time. The quick drying equipment for the secondary side of the nuclear power steam generator can quickly dry the secondary side of the nuclear power steam generator and monitor the drying condition of the secondary side of the nuclear power steam generator in real time, and can effectively shorten the drying operation time and improve the drying efficiency.
Description
Technical Field
The invention relates to the technical field of nuclear power, in particular to a device and a method for quickly drying a secondary side of a nuclear power steam generator.
Background
The steam generator is one of important equipment of a nuclear power plant and is a key equipment for heat exchange of a primary loop and a secondary loop. According to the requirements of regulations, helium leakage detection of the heat transfer tube of the steam generator is required to be carried out every ten years of operation or after other indexes appear, and in order to prevent water drops from blocking potential leakage points of the heat transfer tube, two sides of the heat transfer tube of the steam generator are required to be dried. The steam generator secondary side inner structure is complicated, and heat transfer area is big, easily produces retaining and sweeps dead angle position, is difficult for reaching the dew point temperature condition of requirement.
The existing method for drying the secondary side of the evaporator generally utilizes the residual temperature of the steam generator to accelerate drying after the primary water pressure test, compressed air is used for forced purging the secondary side of the steam generator, the time is at least 72 hours, and the time accounts for approximately one third of the helium leak detection period of the heat transfer tube of the whole steam generator, and if the primary water pressure test is cancelled, the drying time of the secondary side of the evaporator needs to be further prolonged.
Disclosure of Invention
The invention aims to solve the technical problem of providing a device and a method for quickly drying a secondary side of a nuclear power steam generator.
The invention solves the technical problems by adopting the technical scheme that the quick drying equipment for the secondary side of the nuclear power steam generator comprises an air compressor, an air heating device and a gas distributor which are sequentially connected, wherein the gas distributor is connected with the hole of the secondary side of the nuclear power steam generator through a plurality of pipelines so as to input heating gas to the secondary side of the nuclear power steam generator;
The quick drying equipment for the secondary side of the nuclear power steam generator further comprises a plurality of dew point temperature probes and a drying monitoring device connected with the dew point temperature probes, wherein the dew point temperature probes are respectively arranged in the eye holes of the secondary side of the nuclear power steam generator, and the dew point temperature probes are used for feeding dew point temperature information back to the drying monitoring device in real time.
In some embodiments, the air heating device comprises a shell, wherein an inner container is arranged in the shell, a plurality of heating elements are arranged in the inner container, and an air inlet channel is arranged between the inner wall of the shell and the outer wall of the inner container;
The upper side of shell is equipped with the air inlet, the circumference side of shell is equipped with the gas outlet, the both ends of one side of inner bag are equipped with inlet end and end of giving vent to anger respectively, inlet end with inlet channel intercommunication sets up, the gas outlet with the end intercommunication sets up of giving vent to anger.
In some embodiments, a plurality of the heating elements are stacked in a height direction at intervals.
In some embodiments, the vertical spacing between adjacent heating elements is greater than or equal to 0.2cm and less than or equal to 0.5cm.
In some embodiments, the air heating device comprises at least one temperature probe disposed proximate the air outlet, and a control device coupled to the temperature probe and the heating element.
In some embodiments, the air heating device comprises at least one first pressure sensor and at least one second pressure sensor, wherein the first pressure sensor and the second pressure sensor are connected with the control device;
the first pressure sensor is arranged at the air inlet, and the second pressure sensor is arranged at the air outlet.
In some embodiments, the air heating device comprises at least one first gas flow meter and at least one second gas flow meter, wherein the first gas flow meter and the second gas flow meter are connected with the control device;
the first gas flow meter is arranged at the gas inlet, and the second gas flow meter is arranged at the gas outlet.
In some embodiments, the air heating device further comprises a moving wheel disposed at the bottom of the housing.
In some embodiments, the pipeline comprises a heat shield tube.
The invention also discloses a quick drying method for the secondary side of the nuclear power steam generator, which is applied to the quick drying equipment for the secondary side of the nuclear power steam generator in any embodiment, and comprises the following steps:
The air compressor, the air heating device and the gas distributor are sequentially connected, and the gas distributor is connected with a secondary side eye hole of the nuclear power steam generator through a plurality of pipelines so as to input heating gas to the secondary side of the nuclear power steam generator;
The dew point temperature probe is used for monitoring the dew point temperature information of the secondary side of the nuclear power steam generator in real time and feeding the dew point temperature information back to the drying monitoring device in real time.
The quick drying equipment for the secondary side of the nuclear power steam generator has the advantages that the quick drying equipment for the secondary side of the nuclear power steam generator can quickly dry the secondary side of the nuclear power steam generator and monitor the drying condition of the secondary side of the nuclear power steam generator in real time, the drying operation time can be effectively shortened, and the drying efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present invention and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:
FIG. 1 is a schematic diagram of a secondary side flash drying apparatus for a nuclear power steam generator in accordance with some embodiments of the invention;
FIG. 2 is a schematic diagram of an air heating device in accordance with some embodiments of the invention;
Fig. 3 is a schematic view of a part of the structure of an air heating apparatus in some embodiments of the present invention.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present invention.
It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in an interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Referring to fig. 1 to 3, the present invention illustrates a nuclear power steam generator secondary side quick drying apparatus for quick drying of a nuclear power steam generator 100, wherein the nuclear power steam generator 100 may include an evaporator tube wall 101, the evaporator tube wall 101 is provided with a plurality of nuclear power steam generator secondary side holes 102, a tube sheet 103 is provided in the evaporator tube wall 101, and a heat transfer tube bundle 104 is provided on the tube sheet 103.
As shown in fig. 1, the nuclear power steam generator secondary side quick drying apparatus may include an air compressor 10, an air heating device 20, and a gas distributor 30 connected in sequence, the gas distributor 30 being connected to a nuclear power steam generator secondary side eyelet 102 through a plurality of lines 40 to input heated gas to the nuclear power steam generator secondary side. The line 40 may also be provided with a number of control valves which control the flow and velocity of the compressed gas.
The quick drying equipment for the secondary side of the nuclear power steam generator further comprises a plurality of dew point temperature probes 50 and a drying monitoring device 60 connected with the dew point temperature probes 50, wherein the dew point temperature probes 50 are respectively arranged in the eye holes of the secondary side of the nuclear power steam generator, and the dew point temperature probes 50 are used for feeding dew point temperature information back to the drying monitoring device 60 in real time.
Understandably, the quick drying equipment for the secondary side of the nuclear power steam generator can quickly dry the secondary side of the nuclear power steam generator and monitor the drying condition of the secondary side of the nuclear power steam generator in real time, and can effectively shorten the drying operation time and improve the drying efficiency. The quick drying equipment for the secondary side of the nuclear power steam generator can avoid the condition that the primary circuit water pressure test is canceled to prolong the drying time of the secondary side of the nuclear power steam generator. The quick drying equipment for the secondary side of the nuclear power steam generator can obviously shorten the drying time of the secondary side of the nuclear power steam generator, and has corresponding advantages under the condition of no loop hydrostatic test or other occasions where the waste heat of the evaporator cannot be utilized. The method can effectively reduce the total time of the helium leak detection project of the overhaul steam generator and save a key path. Specifically, the secondary side drying time of the helium leak detection project of the single evaporator heat transfer pipe is expected to be shortened by more than 6 hours, and calculated by 6 units, at least more than 36 hours of critical paths can be saved. The benefit is even more pronounced if the re-drying due to secondary side drying failure is considered in the historical empirical feedback. Compared with the existing test process, the secondary side quick drying equipment of the nuclear power steam generator shortens the time occupied by a secondary side critical path by 6 hours, and the economic benefit of single-round overhaul is estimated to be about 260 ten thousand yuan.
In some embodiments, the air compressor 10 is configured to provide clean oil-free compressed air, typically at a gas flow rate of at least 2000Nm 3/h, and the air compressor 10 outlet is de-watered and dried to provide an outlet compressed air dew point temperature of less than-20 ℃.
As shown in fig. 2 and 3, in some embodiments, the air heating device 20 includes a housing 21, a liner 22 is disposed in the housing 21, a plurality of heating elements 23 are disposed in the liner 22, an air inlet channel a is disposed between an inner wall of the housing 21 and an outer wall of the liner 22, and compressed air enters the liner 22 through the air inlet channel a and is subjected to heat exchange by the heating elements 23. A in fig. 2 is a compressed air flow path.
The upper side of the housing 21 is provided with an air inlet 211, the circumferential side of the housing 21 is provided with an air outlet 212, two ends of one side of the liner 22 are respectively provided with an air inlet end 221 and an air outlet end 222, the air inlet end 221 is communicated with the air inlet channel A, and the air outlet 212 is communicated with the air outlet end 222. The air inlet 211 may be an air inlet flange and the air outlet 212 may be an air outlet flange. The air inlet flange and the air outlet flange can adopt the same structural design, can be quickly connected with an air inlet pipe and an air outlet pipe through flange structures, and have good tightness. Preferably, the air inlet 211 and the air outlet 212 may be further provided with adjusting valves for adjusting the flow rate and the flow velocity of the compressed air.
Wherein, the shell 21 and the liner 22 form a jacket structure to form the main body of the air heating device 20, the shell 21 adopts a multi-layer composite material with poor heat conductivity, good heat resistance and certain ductility as an outer layer metal material and an inner liner, so that the air heating device has better pressure-bearing performance, is not easy to dissipate heat, has small overall heat dissipation loss and reduces the scalding risk of operators, and preferably, the composite material can be an asbestos-based composite material but is not limited to the asbestos-based composite material. The liner 22 may be made of a metal material with good thermal conductivity, good heat resistance, and incombustibility, which does not need to bear pressure, but can bear a certain temperature, and preferably, the material of the liner 22 includes, but is not limited to, copper, aluminum, tungsten alloy, and aluminum nitride. The effective flow area of the jacket structure formed by the outer shell 21 and the inner liner 22 is larger than the cross-sectional area of the air inlet 211 (such as an air inlet flange), so that the fluid flow resistance is not increased significantly.
As shown in fig. 3, in some embodiments, a plurality of the heating elements 23 are stacked at intervals along the height direction, and the heating elements 23 are in a zigzag wave shape or other shapes, and the heating elements 23 include, but are not limited to, heating wires or heating sheets. The heating element 23 is at an angle of less than 90 ° to the direction of the inlet of the compressed air. Preferably, the heating elements 23 may be in a W-shaped arrangement structure, which can better increase the contact area between the heating elements 23 and flowing air, and when compressed air enters the inner container 22, the heating elements 23 are in direct contact with each other, so that the heat exchange efficiency is improved, the wind resistance is reduced, the included angle between the flowing direction of the compressed air and the heating elements 23 is set to be smaller than 90 degrees, and the compressed air flowing path is increased, meanwhile, the heating dead angle formed by the compressed air is avoided, and the compressed air flow rate and the heat exchange efficiency on the surface of the heating elements 23 are improved.
As shown in fig. 2, in some embodiments, the vertical spacing between adjacent heating elements 23 is greater than or equal to 0.2cm and less than or equal to 0.5cm. For example, the vertical spacing between adjacent heating elements 23 may be 0.2cm, 0.3cm, 0.4cm, 0.5cm.
As shown in fig. 2, in some embodiments, the air heating device 20 includes at least one temperature probe 24, where the temperature probe 24 is disposed near the air outlet 212, and the temperature probe 24 may be an inner cavity disposed at the air outlet 212, or the temperature probe 24 may be disposed near the air outlet 212 at the air outlet end 222 of the inner container 22. The air heating device 20 further comprises a control device 25, the control device 25 is connected with the temperature probe 24 and the heating element 23, the temperature probe 24 can also be connected with the drying monitoring device 60, and the control device 25 can be mounted on the upper surface of the housing 21. The temperature probe 24 is used for monitoring the temperature of the compressed air in real time and feeding back a temperature signal to the control device 25 and/or the drying monitoring device 60. Of course, the air inlet 211 and the liner 22 may be provided with a temperature probe 24, which is not particularly limited herein.
As shown in fig. 2, in some embodiments, the air heating device 20 includes at least one first pressure sensor 26 and at least one second pressure sensor 27, where the first pressure sensor 26 and the second pressure sensor 27 are connected to the control device 25, and the first pressure sensor 26 is disposed at the air inlet 211 and the second pressure sensor 27 is disposed at the air outlet 212. The first pressure sensor 26 is disposed in the inner cavity of the air inlet 211, the second pressure sensor 27 is disposed in the inner cavity of the air outlet 212, or the first pressure sensor 26 is disposed in the air inlet channel a near the air inlet 211, and the second pressure sensor 27 is disposed in the air inlet channel a near the air inlet 211. The first pressure sensor 26 and the second pressure sensor 27 are used for monitoring the pressure of the air inlet 211 and the air outlet 212 to judge the air path pressure loss of the air heating device 20 for the compressed air.
In some embodiments, as shown in fig. 2, the air heating device 20 comprises at least one first air flow meter 28 and at least one second air flow meter 29, wherein the first air flow meter 28 and the second air flow meter 29 are connected with the control device 25, the first air flow meter 28 is disposed at the air inlet 211, and the second air flow meter 29 is disposed at the air outlet 212. The first gas flow meter 28 is disposed in the inner cavity of the air inlet 211, the second gas flow meter 29 is disposed in the inner cavity of the air outlet 212, or the first gas flow meter 28 is disposed in the air inlet channel a near the air inlet 211, and the second gas flow meter 29 is disposed in the air inlet channel a near the air inlet 211. The first gas flow meter 28 and the second gas flow meter 29 are used for monitoring the gas flow of the gas inlet 211 and the gas outlet 212 to judge the gas flow inhibition condition of the air heating device 20 on the compressed air.
The control device 25 can be used for monitoring and feeding back the pressure, the gas flow and the temperature change of the compressed air passing through the air heating device 20 in real time, and can control the temperature of the air heating device 20 in a mode of combining a fuzzy control theory and PID control, when the temperature of the air outlet 212 of the air heating device 20 reaches a set value, the control device 25 can automatically adjust the output power of the heating element 23 according to the feedback signal of the temperature probe 24 through a PID operation and then control the system, so that the temperature control on the resistive load of the heating element 23 is realized, and the gas temperature of the air outlet 212 is uniform and meets the drying process requirement. The mode of combining fuzzy control and PID control has fast response and setting function, and can be manually and automatically switched according to requirements. Preferably, the control device 25 includes, but is not limited to, a PLC industrial personal computer.
In some embodiments, the control device 25 may set the desired heating target of the air heating device 20, activate the air compressor 10 and determine that the air path is clear. The desired heating target may be, for example, 35-40 ℃, preferably 40 ℃. The control device 25 realizes the interlocking control of the compressed air and the heating element 23, and when the compressed air flow is only present, the heating element 23 can be started, and when the air flow cannot be detected, the heating element 23 is synchronously stopped. The control device 25 starts the operation of the heating element 23 according to the temperature range (such as 35 ℃ to 40 ℃) set by the personnel, when the feedback signal of the temperature probe 24 positioned at the air outlet 212 is lower than the lower temperature limit threshold, and stops the operation of the heating element 23 when the feedback signal of the temperature probe 24 is higher than the upper temperature limit threshold.
As shown in fig. 2, in some embodiments, the air heating device 20 further includes a moving wheel 213 disposed at the bottom of the housing 21. The moving wheel 213 is used for the transport case movement of the air heating device 20. The mobile wheel 213 includes, but is not limited to, a heavy duty universal wheel.
As further shown in fig. 1, the air distributor 30 is positioned near the secondary side eye 102 of the steam generator for multiplexing the compressed air heated by the air heating device 20. The gas distributor 30 is connected to the secondary side eyelets 102 of the nuclear power steam generator by a plurality of lines 40 to supply heated gas to the secondary side of the nuclear power steam generator, the lines 40 comprising heat shielding pipes, the lines 40 being heat shielding pipes made of PVC material with an outer layer of corrugated metal tubing. The heat shield tube is used to connect the gas distributor 30 and the steam generator secondary side eye 102, has certain heat insulating properties, reduces heat loss on the high temperature gas transmission path, and can reduce personnel scalding risks.
In some embodiments, the steam generator secondary side eyelets 102 are located above the tube sheet 103, evenly distributed circumferentially around the evaporator tube wall 101, as an inlet for compressed air to the secondary side of the nuclear power steam generator, and may have at least one set of dew point temperature probes 50 disposed therein. The tube sheet 103 is located inside the evaporator tube wall 101, on which a plurality of heat transfer tube bundles 104 are distributed according to a specific arrangement, and usually there is a considerable amount of residual water above the tube sheet 103 due to structural shielding or insufficient drainage. The heat transfer tube bundles 104 are main inspection objects of helium leak detection of the heat transfer tubes of the evaporator, are arranged in the evaporator tube walls 101 in a specific rule, have narrow gaps between the heat transfer tube bundles 104, are not easy to purge by compressed air, and are easy to have purge dead angles. The evaporator tube wall 101 is a container tube wall which contains the tube plate 103, the heat transfer tube bundle 104 and other parts, and a certain number of eyelets, hand holes and manholes are distributed.
In some embodiments, the dew point temperature probe 50 is located in the secondary side hole 102 of the steam generator, and the dew point temperature probe 50 may also be disposed in the secondary side manhole of the steam generator, where the dew point temperature probe 50 feeds back dew point temperature information to the drying monitoring device 60 in real time, and the drying monitoring device 60 is used for monitoring the drying condition in the secondary side of the nuclear power steam generator. The drying monitor 60 may be a PLC including, but not limited to, the same PLC as the control device 25, and in some embodiments the drying monitor 60. Of course, the drying monitor 60 and the control device 25 may be separate PLC computers.
In addition, an ambient temperature probe can be further disposed in the secondary side hole 102 of the steam generator, the ambient temperature probe is connected with the drying monitoring device 60, and the drying monitoring device 60 monitors and judges the drying condition of the secondary side of the nuclear power steam generator according to the signal collected and fed back.
Understandably, the quick drying equipment for the secondary side of the nuclear power steam generator can accurately heat compressed air, maintain the air flow, monitor the drying condition of the secondary side of the nuclear power steam generator in real time, realize quick drying of the secondary side of the nuclear power steam generator and reliably grasp the drying condition of the secondary side of the nuclear power steam generator.
The secondary side of the nuclear power steam generator is quickly dried, the drying condition of the nuclear power steam generator is monitored in real time, the drying operation time can be effectively shortened, and the drying efficiency is improved.
In some embodiments, the invention also discloses a method for quickly drying the secondary side of the nuclear power steam generator, which is applied to the quick drying equipment for the secondary side of the nuclear power steam generator in any embodiment, and comprises the following steps:
The air compressor 10, the air heating device 20 and the gas distributor 30 are connected in sequence, and the gas distributor 30 is connected to the secondary side eyelets 102 of the nuclear power steam generator through a plurality of lines 40 to input heating gas to the secondary side of the nuclear power steam generator.
The dew point temperature probe 50 monitors dew point temperature information for monitoring the secondary side of the nuclear power steam generator in real time and feeds back the dew point temperature information to the drying monitoring device 60 in real time.
In this embodiment, the method further includes the steps of:
the temperature probe 24, the first pressure sensor 26, the second pressure sensor 27, the first gas flow meter 28 and the second gas flow meter 29 are arranged in place and the air heating device 20 is activated.
The control device 25 sets the intended heating target of the air heating device 20, starts the air compressor 10 and determines that the air path is clear. The desired heating target may be, for example, 35-40 ℃, preferably 40 ℃.
The control device 25 performs interlocking control of the compressed air and the heating element 23, when the first gas flow meter 28 and/or the second gas flow meter 29 detect the compressed air gas flow rate, the heating element 23 is started, and when the first gas flow meter 28 and/or the second gas flow meter 29 detect no compressed air gas flow rate, the heating element 23 is stopped synchronously.
The control device 25 starts the operation of the heating element 23 when the feedback signal of the temperature probe 24 at the air outlet 212 is lower than the lower temperature limit threshold (e.g. 35 ℃) according to the temperature range (e.g. 35 ℃ to 40 ℃) set by the personnel, and stops the operation of the heating element 23 when the feedback signal of the temperature probe 24 is higher than the upper temperature limit threshold (e.g. 40 ℃).
The control device 25 can be used for monitoring and feeding back the pressure, the gas flow and the temperature change of the compressed air passing through the air heating device 20 in real time, and can control the temperature of the air heating device 20 in a mode of combining a fuzzy control theory and PID control, when the temperature of the air outlet 212 of the air heating device 20 reaches a set value, the control device 25 can automatically adjust the output power of the heating element 23 according to the feedback signal of the temperature probe 24 through a PID operation and then control the system, so that the temperature control on the resistive load of the heating element 23 is realized, and the gas temperature of the air outlet 212 is uniform and meets the drying process requirement. The mode of combining fuzzy control and PID control has fast response and setting function, and can be manually and automatically switched according to requirements. Preferably, the control device 25 includes, but is not limited to, a PLC industrial personal computer.
The staff can monitor the drying condition inside the secondary side of the nuclear power steam generator in real time according to the drying monitoring device 60, and can estimate the residual drying time according to the dew point temperature change curve. Further, the staff can monitor the drying condition inside the secondary side of the nuclear power steam generator in real time according to the drying monitoring device 60, and can estimate the residual drying time according to the temperature and dew point temperature change curve.
The quick drying equipment and the quick drying method for the secondary side of the nuclear power steam generator can obviously shorten the drying time of the secondary side of the nuclear power steam generator, and have corresponding advantages under the condition of no loop hydrostatic test or other occasions where the waste heat of the evaporator cannot be utilized. The method can effectively reduce the total time of the helium leak detection project of the overhaul steam generator and save a key path. Specifically, the secondary side drying time of the helium leak detection project of the single evaporator heat transfer pipe is expected to be shortened by more than 6 hours, and calculated by 6 units, at least more than 36 hours of critical paths can be saved. The benefit is even more pronounced if the re-drying due to secondary side drying failure is considered in the historical empirical feedback. Compared with the existing test process, the secondary side quick drying equipment and method of the nuclear power steam generator shorten the time occupied by the secondary side critical path by about 6 hours, and the economic benefit of single-round overhaul is estimated to be about 260 ten thousand yuan.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
It is to be understood that the foregoing examples merely illustrate preferred embodiments of the present invention, and are not to be construed as limiting the scope of the invention, but that it is to be understood that modifications and improvements to the above-described embodiments may be made by those skilled in the art without departing from the spirit of the invention, and that it is intended to cover all modifications and improvements as fall within the scope of the invention.
Claims (10)
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| CN202510096259.9A CN119934802A (en) | 2025-01-21 | 2025-01-21 | Nuclear power steam generator secondary side rapid drying equipment and method |
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| CN202510096259.9A CN119934802A (en) | 2025-01-21 | 2025-01-21 | Nuclear power steam generator secondary side rapid drying equipment and method |
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| CN111351342A (en) * | 2018-12-21 | 2020-06-30 | 核动力运行研究所 | Compact steam generator secondary side tube sheet drying device |
| CN114659270A (en) * | 2022-04-28 | 2022-06-24 | 大连传森科技有限公司 | A high pressure pure air heater |
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2025
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| CN2257012Y (en) * | 1995-12-08 | 1997-06-25 | 锦州市北方电器厂 | Electrothermic pressure air exchanger |
| CN204063573U (en) * | 2014-06-21 | 2014-12-31 | 东莞市博鑫节能环保科技有限公司 | High-efficiency energy-saving heating equipment |
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| CN114659270A (en) * | 2022-04-28 | 2022-06-24 | 大连传森科技有限公司 | A high pressure pure air heater |
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