CN204064988U - Flowing wet steam humidity measuring instrument - Google Patents
Flowing wet steam humidity measuring instrument Download PDFInfo
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- CN204064988U CN204064988U CN201420160100.6U CN201420160100U CN204064988U CN 204064988 U CN204064988 U CN 204064988U CN 201420160100 U CN201420160100 U CN 201420160100U CN 204064988 U CN204064988 U CN 204064988U
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- wet steam
- condensing
- heat exchanger
- flowing wet
- measurement mechanism
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000005259 measurement Methods 0.000 claims abstract description 49
- 238000005070 sampling Methods 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims description 20
- 239000000498 cooling water Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 abstract description 25
- 239000000700 radioactive tracer Substances 0.000 abstract description 21
- 230000007812 deficiency Effects 0.000 abstract description 5
- 230000000704 physical effect Effects 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000007707 calorimetry Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004326 stimulated echo acquisition mode for imaging Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The utility model discloses a kind of flowing wet steam humidity measuring instrument, comprise condensing flowing wet steam measurement mechanism; Also comprise the sampler be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.The utility model both can be measured flowing wet steam humidity in real time, also can carry out tracer method sampling, overcame existing apparatus and cannot realize the deficiency that steam moisture measures in real time and carry out tracer method sampling simultaneously.
Description
Technical field
The utility model relates to a kind of steam wetness measurement device, is specifically related to a kind of humidity measuring instrument for flowing wet steam.
Background technology
Pressurized-water reactor nuclear power plant many employings saturation type natural circulation steam generator.Steam-water separator is one of critical component of this type of steam generator, and its effect is that the steam-water twin phases potpourri of about for mass dryness fraction 30% is carried out centrifuging, becomes the flowing wet steam of humidity about 8% ~ 15%.In order to verify the separating property of steam-water separator, and providing foundation for designing improvement, must carry out the demonstration test of steam-water separator, MEASUREMENT OF STEAM separator outlet vapor humidity is the key parameter that this test needs to obtain.
Being applied to flowing wet steam humidity measuring method in steam generator at present has multiple, as throttling calorimetry, optical method, tracer method etc.Wherein, throttling calorimetry is mainly by approximate adiabatic throttling, and the superheated vapor wet steam of high pressure being changed into lower pressure is measured, but needs High Pressure Difference and minimum damp condition, as humidity is less than 1%.Optical method is more novel, but measuring principle and system complex, optical glass very easily pollutes, very undesirable to the vapour survey result containing large drop higher levels of humidity.Tracer method (adopts CsCO
3as tracer agent) because of its higher degree of accuracy, be widely applied in nuclear power station, but need to expend for a long time for even in whole flow system of tracer agent before measuring, then multidraw assay is carried out, for off-line measurement, be generally used for new nuclear power station steam generator reception test, real-time measurement cannot be realized, not only consuming time but also effort.In view of this, all there is the restriction of inherent shortcoming and application scenario in the existing method being applied to steam generator moisture measurement, can not obtain gratifying effect someway if be only used alone in actual applications.
Find through research, in steam-water separator demonstration test, need the method ability effectively Obtaining Accurate steam-water separator outlet vapor humidity adopting tracer method simultaneously and there is real-time measurement function.
Utility model content
Namely the purpose of this utility model is to overcome the deficiencies in the prior art, provides one both can measure in real time flowing wet steam humidity, also can carry out the flowing wet steam humidity measuring instrument of tracer method sampling.
The purpose of this utility model is achieved through the following technical solutions:
Flowing wet steam humidity measuring instrument, comprises condensing flowing wet steam measurement mechanism; Also comprise the sampler be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
The steam sample of extraction is condensed into high temperature subcooled water by condensing flowing wet steam measurement mechanism, and the steam condensation thermal discharge then absorbed according to chilled water can calculate the humidity of steam.Condensing flowing wet steam measurement mechanism can realize the real-time measurement of steam moisture.
In order to obtain steam humidity value accurately, also needing cooperation to carry out tracer method steam wetness measurement, therefore increasing sampler.Sampler samples the condensate water flowed out in condensing flowing wet steam measurement mechanism, and namely this sampling sample can be used for tracer method steam wetness measurement.
The utility model both can be measured flowing wet steam humidity in real time, also can carry out tracer method sampling, overcame existing apparatus and cannot realize the deficiency that steam moisture measures in real time and carry out tracer method sampling simultaneously.
Further, described condensing flowing wet steam measurement mechanism comprises: condensing heat exchanger; Be arranged at the first temperature sensor on condensing heat exchanger steam inlet pipeline and the first pressure transducer; Be arranged at the second pressure transducer on condensing heat exchanger cooling water inlet pipeline, the second temperature sensor and second quantity sensor; Be arranged at the 3rd pressure transducer, three-temperature sensor and the first flow sensor on condensing heat exchanger condensation-water drain pipeline.
Further, described sampler comprises the sampling jar be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
Further, described sampler also comprises the cooling heat exchanger be connected with the condensation-water drain pipeline of condensing flowing wet steam measurement mechanism described in water inlet, and the multi-level throttle orifice plate to be connected with cooling heat exchanger water delivering orifice, multi-level throttle orifice plate is connected with described sampling jar; Described sampler also comprises the 4th temperature sensor be arranged between multi-level throttle orifice plate and described sampling jar.
Sample for tracer method needs to reach predetermined temperature and pressure, therefore arranges cooling heat exchanger, makes sample reach predetermined temperature, arranges multi-level throttle orifice plate and reduces pressure to sample.
Further, the emissions adjustment valve be arranged between described 4th temperature sensor and described sampling jar is also comprised.
By conditions of discharge valve, the operating pressure of sampler can be controlled.
Further, the cooling water inlet of described cooling heat exchanger is connected by the cooling water inlet pipeline of pipeline with described condensing flowing wet steam measurement mechanism.
This structure makes a water system can supply water to condensing flowing wet steam measurement mechanism and sampler, reduces volume of the present utility model, simplifies structure of the present utility model.
In sum, advantage of the present utility model and beneficial effect are:
1. the utility model both can be measured flowing wet steam humidity in real time, also can carry out tracer method sampling, overcame existing apparatus and cannot realize the deficiency that steam moisture measures in real time and carry out tracer method sampling simultaneously;
2. cooling heat exchanger and multi-level throttle orifice plate are set, sample can be made to reach predetermined temperature and pressure;
3. emissions adjustment valve is set, the operating pressure of sampler can be controlled;
4. the cooling water inlet of cooling heat exchanger is connected by the cooling water inlet pipeline of pipeline with condensing flowing wet steam measurement mechanism, a water system can be supplied water to condensing flowing wet steam measurement mechanism and sampler, reduce volume of the present utility model, simplify structure of the present utility model.
Accompanying drawing explanation
In order to be illustrated more clearly in embodiment of the present utility model, be briefly described to the accompanying drawing used required for describing in the utility model embodiment below.Apparent, the accompanying drawing in the following describes is only some embodiments recorded in the utility model, for a person skilled in the art, when not paying creative work, according to accompanying drawing below, can also obtain other accompanying drawing.
Fig. 1 is structural representation of the present utility model;
Wherein, the parts title that Reference numeral is corresponding is as follows:
1-steam-water separator experiment body, 2-steam sampling pipe isolation valve, 3-first pressure transducer, 4-condensing heat exchanger, 5-water system, 6-cooling water isolation valve, 7-second pressure transducer, 8-second temperature sensor, 9-second quantity sensor, 10-the 3rd pressure transducer, 11-three-temperature sensor, 12-first flow sensor, 13-cooling heat exchanger, 14-the 4th temperature sensor, 15-emissions adjustment valve, 16-sampling jar, 17-multi-level throttle orifice plate, 18-variable valve, 19-cooling-water drain groove, 20-first temperature sensor, 21-variable valve.
Embodiment
In order to make those skilled in the art understand the utility model better, below in conjunction with the accompanying drawing in the utility model embodiment, clear, complete description is carried out to the technical scheme in the utility model embodiment.Apparent, embodiment described below is only the part in the utility model embodiment, instead of all.Based on the embodiment that the utility model is recorded, other all embodiment that those skilled in the art obtain when not paying creative work, all in the scope of the utility model protection.
Embodiment 1:
As shown in Figure 1, flowing wet steam humidity measuring instrument, comprises condensing flowing wet steam measurement mechanism; Also comprise the sampler be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
The steam sample of extraction is condensed into high temperature subcooled water by condensing flowing wet steam measurement mechanism, and the steam condensation thermal discharge then absorbed according to chilled water can calculate the humidity of steam.Condensing flowing wet steam measurement mechanism can realize the real-time measurement of steam moisture.
In order to obtain steam humidity value accurately, also needing cooperation to carry out tracer method steam wetness measurement, therefore increasing sampler.Sampler samples the condensate water flowed out in condensing flowing wet steam measurement mechanism, and namely this sampling sample can be used for tracer method steam wetness measurement.
The present embodiment both can be measured flowing wet steam humidity in real time, also can carry out tracer method sampling, overcame existing apparatus and cannot realize the deficiency that steam moisture measures in real time and carry out tracer method sampling simultaneously.
Embodiment 2:
As shown in Figure 1, the present embodiment, on the basis of embodiment 1, is further described the concrete structure of condensing flowing wet steam measurement mechanism.
Described condensing flowing wet steam measurement mechanism comprises: condensing heat exchanger 4; Be arranged at the first temperature sensor 20 and the first pressure transducer 3 on condensing heat exchanger 4 steam inlet pipeline; Be arranged at the second pressure transducer 7, second temperature sensor 8 and second quantity sensor 9 on condensing heat exchanger 4 cooling water inlet pipeline; Be arranged at the 3rd pressure transducer 10, three-temperature sensor 11 and the first flow sensor 12 on condensing heat exchanger 4 condensation-water drain pipeline.
Wet steam records pressure P through the first pressure transducer 3
101after, flow into condensing heat exchanger 4.Chilled water, through the second pressure transducer 7, second temperature sensor 8 and second quantity sensor 9, records temperature T
201, pressure P
201with flow F
201after, enter condensing heat exchanger 4, implement countercurrent flow with wet steam by tube wall, wet steam is condensed into high temperature subcooled water.High temperature subcooled water records temperature T after the 3rd pressure transducer 10, three-temperature sensor 11 and first flow sensor 12
101, pressure P
102with flow F
101.
Can be calculated the humidity of wet steam by above-mentioned parameter.
In order to enable those skilled in the art's understanding the utility model clearly, below the calculating of humidity is described.
According to law of conservation of energy
;
The then enthalpy of wet steam:
;
The surface radiating amount of condensing heat exchanger 4:
；
The humidity of wet steam can be calculated thus:
；
In above formula, each calculating parameter can calculate wet steam humidity in real time by measuring in real time.
Wherein:
for enthalpy of wet steam, kJ/kg;
for condensing heat exchanger outlet chilled water enthalpy, by the temperature T measured
202and pressure P
201calculating physical property obtains, kJ/kg;
for condensing heat exchanger entrance chilled water enthalpy, by the temperature T measured
201and pressure P
201calculating physical property obtains, kJ/kg;
for condensing heat exchanger primary side outlet condensate water enthalpy, by the temperature T measured
101and pressure P
102calculating physical property obtains, kJ/kg;
for condensing heat exchanger is to the heat dissipation capacity of environment, comprising radiation and the quantity of heat convection, obtaining by measuring insulation layer surface temperature computation, kW;
A is heat-insulation layer external surface area
, m
2; D is heat-insulation layer external diameter, m; L is heat interchanger length, m;
for the saturation water enthalpy under wet steam corresponding pressure condition, by the pressure P measured
101calculating physical property obtains, kJ/kg;
for the latent heat of vaporization of the water under wet steam corresponding pressure condition, by the pressure P measured
101calculating physical property obtains, kJ/kg.
Embodiment 3:
As shown in Figure 1, the present embodiment, on the basis of embodiment 1 or 2, is further described sampler.
Described sampler comprises the sampling jar 16 be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
Embodiment 4:
As shown in Figure 1, the present embodiment, on the basis of embodiment 3, is further described sampler.
Described sampler also comprises the cooling heat exchanger 13 be connected with the condensation-water drain pipeline of condensing flowing wet steam measurement mechanism described in water inlet, and the multi-level throttle orifice plate 17 to be connected with cooling heat exchanger 13 water delivering orifice, multi-level throttle orifice plate 17 is connected with described sampling jar 16;
Described sampler also comprises the 4th temperature sensor 14 be arranged between multi-level throttle orifice plate 17 and described sampling jar 16.
Sample for tracer method needs to reach predetermined temperature and pressure, therefore cooling heat exchanger 13 is set, make sample reach predetermined temperature, multi-level throttle orifice plate 17 pairs of samples are set and reduce pressure, the temperature of the 4th temperature sensor 14 to sampling sample is set and monitors.
Embodiment 5:
As shown in Figure 1, the present embodiment, on the basis of embodiment 4, also comprises the emissions adjustment valve be arranged between described 4th temperature sensor and described sampling jar.
By conditions of discharge valve 15, the operating pressure of sampler can be controlled.
Embodiment 6:
As shown in Figure 1, the present embodiment is on the basis of any one embodiment above-mentioned, and the cooling water inlet of described cooling heat exchanger 13 is connected by the cooling water inlet pipeline of pipeline with described condensing flowing wet steam measurement mechanism.
This structure makes a water system can supply water to condensing flowing wet steam measurement mechanism and sampler, reduces volume of the present utility model, simplifies structure of the present utility model.
Embodiment 7:
As shown in Figure 1, flowing wet steam humidity measuring instrument, comprises condensing flowing wet steam measurement mechanism; Also comprise the sampler be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
Described condensing flowing wet steam measurement mechanism comprises: condensing heat exchanger 4(double-pipe exchanger); Be arranged at the first pressure transducer 3 on condensing heat exchanger 4 steam inlet pipeline; Be arranged at the second pressure transducer 7, second temperature sensor 8 and second quantity sensor 9 on condensing heat exchanger 4 cooling water inlet pipeline; Be arranged at the 3rd pressure transducer 10, three-temperature sensor 11 and the first flow sensor 12 on condensing heat exchanger 4 condensation-water drain pipeline.
Described sampler comprises the sampling jar 16 be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism.
Described sampler also comprises the cooling heat exchanger 13 be connected with the condensation-water drain pipeline of condensing flowing wet steam measurement mechanism described in water inlet, and with cooling heat exchanger 13(tube exchanger) multi-level throttle orifice plate 17 that water delivering orifice is connected, multi-level throttle orifice plate 17 is connected with described sampling jar 16; Described sampler also comprises the 4th temperature sensor 14 be arranged between multi-level throttle orifice plate 17 and described sampling jar 16.
Also comprise the emissions adjustment valve 15 be arranged between described 4th temperature sensor 14 and described sampling jar 16.
The cooling water inlet of described cooling heat exchanger 13 is connected by the cooling water inlet pipeline of pipeline with described condensing flowing wet steam measurement mechanism.
During work, open steam sampling pipe isolation valve 2, from steam-water separator experiment body 1, introduce wet steam.Wet steam records pressure P through the first pressure transducer 3
101after, flow into condensing heat exchanger 4.Open cooling water isolation valve 6, from the chilled water in water system 5 through the second pressure transducer 7, second temperature sensor 8 and second quantity sensor 9, record temperature T
201, pressure P
201with flow F
201after, enter condensing heat exchanger 4, implement countercurrent flow with wet steam by tube wall, wet steam is condensed into high temperature subcooled water.High temperature subcooled water records temperature T after the 3rd pressure transducer 10, three-temperature sensor 11 and first flow sensor 12
101, pressure P
102with flow F
101.For calculating the illustrating with reference to embodiment 2 of humidity.
Open variable valve 21, the chilled water in condensing heat exchanger 4 is flowed in cooling-water drain groove 19 after the first temperature sensor 20 detected temperatures.
The high temperature subcooled water flowed out from condensing heat exchanger 4 enters cooling heat exchanger 13.Flow in cooling heat exchanger 13 from the chilled water in water system 5, high temperature subcooled water is cooled to sample temperature, after multi-level throttle orifice plate 17 reduces pressure, open emissions adjustment valve 15, sampling sample enters sampling jar 16, measures for tracer method.In this process, the temperature of the 4th temperature sensor 14 to sampling sample is adopted to monitor.Open variable valve 18, the chilled water in cooling heat exchanger 13 enters in cooling-water drain groove 19.
As mentioned above, the utility model can be realized preferably.
Claims (3)
1. flowing wet steam humidity measuring instrument, is characterized in that:
Comprise condensing flowing wet steam measurement mechanism;
Also comprise the sampler be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism;
Described sampler comprises the sampling jar (16) be connected with the condensation-water drain pipeline of described condensing flowing wet steam measurement mechanism;
Described sampler also comprises the cooling heat exchanger (13) be connected with the condensation-water drain pipeline of condensing flowing wet steam measurement mechanism described in water inlet, and the multi-level throttle orifice plate (17) to be connected with cooling heat exchanger (13) water delivering orifice, multi-level throttle orifice plate (17) is connected with described sampling jar (16);
Described sampler also comprises the 4th temperature sensor (14) be arranged between multi-level throttle orifice plate (17) and described sampling jar (16);
The cooling water inlet of described cooling heat exchanger (13) is connected by the cooling water inlet pipeline of pipeline with described condensing flowing wet steam measurement mechanism.
2. flowing wet steam humidity measuring instrument according to claim 1, is characterized in that, described condensing flowing wet steam measurement mechanism comprises:
Condensing heat exchanger (4);
Be arranged at the first pressure transducer (3) on condensing heat exchanger (4) steam inlet pipeline;
Be arranged at the second pressure transducer (7) on condensing heat exchanger (4) cooling water inlet pipeline, the second temperature sensor (8) and second quantity sensor (9);
Be arranged at the 3rd pressure transducer (10), three-temperature sensor (11) and the first flow sensor (12) on condensing heat exchanger (4) condensation-water drain pipeline.
3. flowing wet steam humidity measuring instrument according to claim 1, is characterized in that:
Also comprise the emissions adjustment valve (15) be arranged between described 4th temperature sensor (14) and described sampling jar (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420160100.6U CN204064988U (en) | 2014-04-03 | 2014-04-03 | Flowing wet steam humidity measuring instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420160100.6U CN204064988U (en) | 2014-04-03 | 2014-04-03 | Flowing wet steam humidity measuring instrument |
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|---|---|
| CN204064988U true CN204064988U (en) | 2014-12-31 |
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ID=52206474
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|---|---|---|---|
| CN201420160100.6U Expired - Lifetime CN204064988U (en) | 2014-04-03 | 2014-04-03 | Flowing wet steam humidity measuring instrument |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136857A (en) * | 2015-09-30 | 2015-12-09 | 东南大学 | Method for measuring moisture supersaturation degree and device of method |
| CN106706707A (en) * | 2016-12-21 | 2017-05-24 | 西安交通大学 | Flowing wet vapor humidity sensor based on electric arc heating and measuring method |
| CN106932436A (en) * | 2015-12-31 | 2017-07-07 | 核动力运行研究所 | A kind of online steam wetness measurement system and measuring method |
| CN109459533A (en) * | 2018-11-22 | 2019-03-12 | 南京林业大学 | A kind of steam wetness measurement devices and methods therefor |
| CN109507372A (en) * | 2018-12-21 | 2019-03-22 | 核动力运行研究所 | A kind of steam generator steam wetness measurement system and method |
| CN110108595A (en) * | 2019-04-15 | 2019-08-09 | 中国辐射防护研究院 | A kind of gas-vapour mixing method humidity detection device |
| CN111068411A (en) * | 2019-12-30 | 2020-04-28 | 哈尔滨工程大学 | System for researching steam-water separation performance of corrugated plate dryer |
| CN112489840A (en) * | 2020-11-12 | 2021-03-12 | 中广核工程有限公司 | Tracer injection equipment for steam humidity measurement test of nuclear power plant |
| CN115219547A (en) * | 2021-04-14 | 2022-10-21 | 中国石油天然气股份有限公司 | Wellhead steam dryness monitoring device and wellhead steam dryness monitoring method |
-
2014
- 2014-04-03 CN CN201420160100.6U patent/CN204064988U/en not_active Expired - Lifetime
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105136857B (en) * | 2015-09-30 | 2017-10-31 | 东南大学 | A kind of method and its device for measuring steam degree of supersaturation |
| CN105136857A (en) * | 2015-09-30 | 2015-12-09 | 东南大学 | Method for measuring moisture supersaturation degree and device of method |
| CN106932436A (en) * | 2015-12-31 | 2017-07-07 | 核动力运行研究所 | A kind of online steam wetness measurement system and measuring method |
| CN106932436B (en) * | 2015-12-31 | 2023-11-21 | 核动力运行研究所 | Online steam humidity measurement system and measurement method |
| CN106706707A (en) * | 2016-12-21 | 2017-05-24 | 西安交通大学 | Flowing wet vapor humidity sensor based on electric arc heating and measuring method |
| CN106706707B (en) * | 2016-12-21 | 2019-03-01 | 西安交通大学 | A kind of flowing wet steam humidity sensor and measurement method based on electric arc heated |
| CN109459533B (en) * | 2018-11-22 | 2023-10-27 | 南京林业大学 | Steam humidity measuring device and method thereof |
| CN109459533A (en) * | 2018-11-22 | 2019-03-12 | 南京林业大学 | A kind of steam wetness measurement devices and methods therefor |
| CN109507372A (en) * | 2018-12-21 | 2019-03-22 | 核动力运行研究所 | A kind of steam generator steam wetness measurement system and method |
| CN109507372B (en) * | 2018-12-21 | 2023-10-20 | 核动力运行研究所 | Steam humidity measurement system and method for steam generator |
| CN110108595B (en) * | 2019-04-15 | 2021-09-24 | 中国辐射防护研究院 | Humidity monitoring device adopting gas-steam mixing method |
| CN110108595A (en) * | 2019-04-15 | 2019-08-09 | 中国辐射防护研究院 | A kind of gas-vapour mixing method humidity detection device |
| CN111068411A (en) * | 2019-12-30 | 2020-04-28 | 哈尔滨工程大学 | System for researching steam-water separation performance of corrugated plate dryer |
| CN112489840A (en) * | 2020-11-12 | 2021-03-12 | 中广核工程有限公司 | Tracer injection equipment for steam humidity measurement test of nuclear power plant |
| CN115219547A (en) * | 2021-04-14 | 2022-10-21 | 中国石油天然气股份有限公司 | Wellhead steam dryness monitoring device and wellhead steam dryness monitoring method |
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