CN109741842A - Nuclear power plant capacity control box deaeration test system and method - Google Patents
Nuclear power plant capacity control box deaeration test system and method Download PDFInfo
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- CN109741842A CN109741842A CN201910011687.1A CN201910011687A CN109741842A CN 109741842 A CN109741842 A CN 109741842A CN 201910011687 A CN201910011687 A CN 201910011687A CN 109741842 A CN109741842 A CN 109741842A
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- 238000012360 testing method Methods 0.000 title claims abstract description 131
- 238000000034 method Methods 0.000 title claims abstract description 59
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 138
- 239000001301 oxygen Substances 0.000 claims abstract description 138
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 138
- 239000007788 liquid Substances 0.000 claims abstract description 119
- 238000010926 purge Methods 0.000 claims abstract description 100
- 239000007789 gas Substances 0.000 claims abstract description 79
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000006392 deoxygenation reaction Methods 0.000 claims abstract description 48
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims abstract description 34
- 238000010998 test method Methods 0.000 claims abstract description 10
- 230000033228 biological regulation Effects 0.000 claims abstract description 4
- 238000007599 discharging Methods 0.000 claims abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 74
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 238000002474 experimental method Methods 0.000 claims description 26
- 238000002347 injection Methods 0.000 claims description 24
- 239000007924 injection Substances 0.000 claims description 24
- 238000005273 aeration Methods 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 8
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 14
- 238000005457 optimization Methods 0.000 abstract 1
- 238000012956 testing procedure Methods 0.000 description 36
- 206010037544 Purging Diseases 0.000 description 25
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 17
- 239000002826 coolant Substances 0.000 description 15
- 239000000470 constituent Substances 0.000 description 8
- 238000005259 measurement Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000007872 degassing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- -1 and Δ P is smaller Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000001387 multinomial test Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
本发明公开了一种核电厂容控箱除氧测试系统以及方法，系统包括上充下泄系统、吹扫系统、含氧量调节系统、温度控制系统、参数监控系统，本发明的测试系统提供上充流和下泄流的流量控制、温度调节、含氧量控制、氮气补给以及气体排放等功能，基于这些功能可以实现“间歇吹扫”、“憋压排气”的测试，并且本发明还分别就其在不同工况分别设计了相应的测试方法，通过测试获得容控箱液位、等待时间和吹扫时间对“间歇吹扫”除氧效果的影响规律；以及获得静置时间对“憋压排气”除氧效果的影响规律；并且通过两种方法的测试数据的比较，可以获得“间歇吹扫”和“憋压排气”两种方法在除氧效果上的差异，为实际机组除氧策略优化调整提供更优的数据支撑。
The invention discloses a deoxygenation test system and method for a capacity control box of a nuclear power plant. The system includes a top charging and discharging system, a purging system, an oxygen content regulation system, a temperature control system and a parameter monitoring system. The test system of the present invention provides the above The functions of flow control, temperature adjustment, oxygen content control, nitrogen supply, and gas discharge of charging flow and downflow flow can be realized based on these functions, and the tests of "intermittent purging" and "pressure-holding exhaust" can be realized. Corresponding test methods were designed in different working conditions, and the influence of the liquid level, waiting time and purging time of the capacity control box on the deoxygenation effect of "intermittent purging" was obtained through the test; By comparing the test data of the two methods, the difference between the two methods of “intermittent purging” and “pressurized exhaust” in the deoxidizing effect can be obtained, which is the actual unit. The optimization and adjustment of the deoxygenation strategy provides better data support.
Description
Technical field
The present invention relates to nuclear power fields more particularly to a kind of nuclear power plant to hold control case deoxygenation test macro and method.
Background technique
Chemistry, as one of compacted clay liners core auxiliary system, plays important work with volume control system in operation
With；Wherein volumetric void fraction effect compensates for nuclear power plant and stops from cold conditions to Hot zero power start-up course or from Hot zero power to cold
The variation of caused coolant circuit water volume during heap.Fig. 1 is that primary Ioopsization hold system control principle drawing, in order to maintain
Coolant circuit constant level holds system equipped with the change being connected with coolant circuit, includes in change appearance system in normal power generation
Hold control case etc..Pipeline and equipment in coolant circuit are made of stainless steel, and the dissolved oxygen in water can make pipeline and equipment
At corrosion.The mechanism of oxygen corrosion is as follows: anode: Fe → Fe2 ++2e-；Cathode: O2+H2O+4e-→4OH-, the Fe of generation2 +It can be into one
Step oxidation, the corrosion product ultimately generated is Fe3O4, and the corrosion rate of the raising meeting acceleration equipment of oxygen in water concentration, it makes
The damage of forming apparatus.
Therefore, nuclear power plant has stringent control requirement to the oxygen content in coolant.When unit starting, when primary Ioops are closed
After participation gas flow reaches requirement later, volume control system is used to carry out the final deoxygenation of primary Ioops.In volume control system
In, there are two oxygen balance: first is that in dissolved oxygen and coolant circuit in coolant circuit in water in gas oxygen balance；Two
It is the balance of oxygen in dissolved oxygen and the gas phase held in control case in liquid phase water.Due to holding, there are one between control case and coolant circuit
Dynamic equilibrium process, that is, the water held in control case can flow into coolant circuit, and the water in coolant circuit can also flow into appearance control
It, can be by reducing the dissolution held in control case in water in order to realize the content for reducing the dissolved oxygen in coolant circuit in water in case
The content of oxygen is realized.Common Deoxidization method has: physics deoxygenation and chemical deoxidization, wherein physics deoxygenation basic principle is as follows:
1) Dalton's law (of partial pressures): mixed gas total pressure is equal to it and forms the sum of each gas partial pressure, that is, holds in control case
Mixed gas total pressure P on the water surface should be equal to each gas (N2, O2, CO2 etc.) partial pressure in dissolution waterIt
With:
2) Henry's law: the solubility of gas in water, it is directly proportional to partial pressure of the gas on the water surface.That is unit bodies
The partial pressure P of the gas on certain gas flow b and the water surface is dissolved in pondingbIt is directly proportional, expression formula are as follows:
In formula: P is mixed gas total pressure, KbFor the weight solubility coefficient of the gas, it and gaseous species, on the water surface
The gas partial pressure is related with the temperature of water.
3) mass transfer equation
Gas, which isolates the water surface, will enough power (Δ P), mass transfer equation are as follows:
G=Km·A·ΔP
In formula: G is educt gas amount；KmFor mass tranfer coefficient；A is mass transfer area；Δ P is uneven pressure difference, i.e. balance pressure
The difference of power and practical partial pressure.
In summary various, it can be drawn a conclusion: the meltage of general gas flow (O2, CO2, air etc.) in water under level pressure
Directly proportional to partial pressure of the gas on liquid level, when the partial pressure of the gas is zero, its meltage also goes to zero；According to biography
Matter equation will have enough uneven pressure differential deltap P, and deoxygenation initial stage gas dissolved water is more, and Δ P is larger, in the form of small bubble
The driving force for overcoming water surface tension to isolate from water is larger, can remove 80%~90% of gas in water, in corresponding water
Oxygen content can be reduced to 0.05~0.1mg/l.The deoxygenation later period only dissolves remaining a small amount of gas in water, and Δ P is smaller, gas
It has been difficult to overcome the surface tension of water to isolate, it must be by increasing carbonated drink contact surface (forming moisture film, the surface tension of moisture film is small) or water
The diffusion of turbulent flow, isolates gas from water.
A kind of relatively common method of chemical deoxidization is that hydrazine is added into coolant water, passes through reacting for hydrazine and oxygen
(N2H4+O2→N2+2H2O) dissolved oxygen in water is removed as far as possible.The prior art determines to return to coolant generally by empirical value
The amount of the hydrazine added in road be easy to cause the amount of addition hydrazine bigger than normal or less than normal, when the usage amount of hydrazine is less than normal, no in this way
The dissolved oxygen in water can be completely removed；And when the usage amount of hydrazine is bigger than normal, extra hydrazine can be consumed except salt bed resin
Exchange capacity makes its failure.
The currently employed method of nuclear power plant is first progress physics deoxygenation, and physics deoxygenation is qualified and then is carried out using hydrazine
Chemical deoxidization.There are two ways to physics deoxygenation uses:
1), build the pressure degassing method: artificially raising appearance control case liquid level to certain altitude, manually opened exhaust valve is exhausted.It is logical
The method for crossing lifting water level carries out nitrogen purging to control case is held.It will first hold at control case water level promoting to 90% liquid level, then open manually
It opens exhaust valve and is exhausted to control case is held；Liquid level is reduced after the completion of exhaust to 50%, and gas blanket is carried out after standing 2 hours
Sampling and measuring oxygen content repeats the operation until holding control case oxygen content qualification.
2), interval purging degassing method: inert gas N is continuously purged to holding in control case2And at interval of a period of time
Exhaust.It opens per hour and holds control case exhaust valve 5 minutes, continuously purged using nitrogen, until oxygen content reaches requirement.
Nuclear power plant carries out in the practical operation of final deoxygenation that there are the following problems to primary Ioops using control case is held at present: current
Case deoxygenation performance test correlation technique is controlled without holding, is empirically parameter progress to the operation for holding control case deoxygenation, existing cannot one
The qualified problem of secondary purging, occupies the overhaul time；It, cannot basis after residual air amount before purging in primary Ioops changes
Deoxygenation strategy is adjusted flexibly in actual conditions.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of nuclear power plant's appearance control
Case deoxygenation test macro and method.
The technical solution adopted by the present invention to solve the technical problems is:
On the one hand the embodiment of the present invention provides a kind of nuclear power plant's appearance control case deoxygenation test macro, comprising:
Charge-letdown system including buffer container, the liquid in the buffer container is imported under the appearance control case and is let out
Pipeline, by it is described hold control case liquid lead back to the buffer container on fill pipeline, on fill under let out control unit, control is let out under above filling
Unit processed be used to control lower aerial drainage in the letdown line and it is described on fill the flow and pressure of charging stream in pipeline；
Purge system is connect with appearance control case, can be used for controlling case injection nitrogen to the appearance and the appearance is controlled case
Interior gas discharge；
Oxygen content regulating system is connect with the letdown line, can be used for injecting oxygen into the lower aerial drainage to adjust
Oxygen content in lower aerial drainage；
Temperature control system is connect with the buffer container, after being passed through heating into the liquid of the buffer container
Steam to adjust the fluid temperature；
Parameter monitoring system, for monitoring the lower aerial drainage and the flow of charging stream, pressure, oxygen content, and monitoring institute
State pressure, liquid level, oxygen content gas and the liquid containing oxygen amount held in control case.
Optionally, letting out control unit under above filling includes:
Be set to and fill on pipeline: above fill pump, fill on described pump upstream on fill isolating valve, fill on described
Pump the charging stream flow control valve in downstream；
Be set on letdown line: under let out pump, the upstream of pump is let out under described under let out isolating valve, be located at it is described under
Let out the lower aerial drainage pressure reducing valve in pump downstream, oxygen content regulating system described in the downstream connection of the lower aerial drainage pressure reducing valve；
Bypass line and the lower discharge flow regulating valve being set on the bypass line, the bypass line are connected to
Between lower aerial drainage pressure reducing valve downstream and buffer container.
Optionally, the purge system includes nitrogen cylinder, the connection nitrogen cylinder and appearance control case equipped with nitrogen
Nitrogen purge line, the connection exhaust line for holding control box top, is set the pressure maintaining valve being set in the nitrogen purge line
Set the exhaust valve on the exhaust line.
Optionally, the oxygen content regulating system includes: air compressor, aeration pipeline, is set to the aeration pipeline
On aeration flow control valve, hold control case air injection tube line, be set to it is described hold control case air injection tube line on appearance control case
Air injection valve, the air compressor connect letdown line by the aeration pipeline, and the air compressor also passes through institute
It states appearance control case air injection tube line and connects appearance control box top.
Optionally, the parameter monitoring system includes being arranged in the charge-letdown system, nitrogen purge system, oxygen tune
Section system and it is described hold control case in acquisition oxygen content, liquid level, flow, pressure, temperature data various sensors.
Optionally, test macro further include:
Liquid injection system, including with it is described hold control bottom portion connect water supply line, be set to removing in the water supply line
Oxygen equipment, the small pump positioned at deaeration plant downstream, the water compensating valve positioned at small pump downstream.
On the other hand the embodiment of the present invention provides a kind of nuclear power plant's appearance control case deoxygenation test method, real based on aforementioned system
It is existing, which comprises the multiple groups value based on test parameter executes multiple test experiments, and test experiments take the survey each time
One group of value for trying parameter executes；Wherein, when the test parameter includes that test liquid level, single waiting time and single are vented
Between, wherein the test experiments include:
Preparation process: there is the demineralized water for providing oxygen content to injection in control case is held, and will be held by steam-heating system
The temperature of liquid maintains constant in control case；
Testing procedure one: the liquid level that will hold control case is adjusted to the test liquid level, by letting out control unit under filling on described
Flow control by lower aerial drainage and charging stream is zero, and the appearance is controlled pressure in case by the purge system and maintains first in advance
If pressure；
Testing procedure two: executing interval purging until the parameter monitoring system monitors oxygen content gas in appearance control case and reaches
To stabilization, the interval purging includes: to control the appearance by the purge system at interval of a single waiting time
Gas in control case is once vented according to the single evacuation time；
Testing procedure three: determining the time for executing interval purging, and monitoring system determination is executing based on the parameter
Interval purging front and back holds the variation of the liquid containing oxygen amount in control case.
On the other hand the embodiment of the present invention provides a kind of nuclear power plant's appearance control case deoxygenation test method, real based on aforementioned system
It is existing, which comprises
Preparation process: the water after deoxygenation is injected in control case to holding, and liquid in control case will be held by steam-heating system
The temperature of body maintains constant；
Testing procedure one: the stability of flow of the charging stream is maintained by letting out control unit under filling on described and maintains institute
Flow, the pressure for stating lower aerial drainage are stable, and the appearance is controlled pressure in case by the purge system and maintains the second preset pressure；
Testing procedure two: the oxygen content in lower aerial drainage is adjusted to pre-determined stability value by oxygen content regulating system；
Testing procedure three: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case is lifted to the first liquid level, and the gas held in control case is discharged by the purge system and the appearance is made to control case
Interior pressure maintains third preset pressure；
Testing procedure four: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case reduces and maintains the second liquid level；
Testing procedure five: standing, and adjusts the oxygen content in lower aerial drainage to pre- by oxygen content regulating system during standing
If stationary value, and monitoring system records the oxygen content gas and liquid containing oxygen amount in real time based on the parameter during standing
Situation of change.
On the other hand the embodiment of the present invention provides a kind of nuclear power plant's appearance control case deoxygenation test method, real based on aforementioned system
It is existing, which comprises the multiple groups value based on test parameter executes multiple test experiments, and test experiments take the survey each time
One group of value for trying parameter executes；Wherein, when the test parameter includes that test liquid level, single waiting time and single are vented
Between, wherein the test experiments include:
Preparation process: there is the demineralized water for providing oxygen content to injection in control case is held, and will be held by steam-heating system
The temperature of liquid maintains constant in control case；
Testing procedure one: the liquid level that will hold control case is adjusted to the test liquid level, by letting out control unit under filling on described
It maintains the stability of flow of the charging stream and the flow of the lower aerial drainage, pressure is maintained to stablize, it will by the purge system
The gas held in control case is discharged and pressure in the appearance control case is made to maintain the 4th preset pressure；
Testing procedure two: executing interval purging until the parameter monitoring system monitors oxygen content gas in appearance control case and reaches
To stabilization, the interval purging includes: to control the appearance by the purge system at interval of a single waiting time
Gas in control case is once vented according to the single evacuation time；
Testing procedure three: determining the time for executing interval purging, and monitoring system determination is executing based on the parameter
Interval purging front and back holds the variation of the liquid containing oxygen amount in control case.
On the other hand the embodiment of the present invention provides a kind of nuclear power plant's appearance control case deoxygenation test method, real based on aforementioned system
It is existing, which comprises
Preparation process: the water after deoxygenation is injected in control case to holding, and liquid in control case will be held by steam-heating system
The temperature of body maintains constant；
Testing procedure one: the stability of flow of the charging stream is maintained by letting out control unit under filling on described and maintains institute
Flow, the pressure for stating lower aerial drainage are stable, and the appearance is controlled pressure in case by the purge system and maintains the 5th preset pressure；
Testing procedure two: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case is lifted to the first liquid level, and the gas held in control case is discharged by the purge system and the appearance is made to control case
Interior pressure maintains the 6th preset pressure；
Testing procedure three: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case reduces and maintains the second liquid level；
Testing procedure four: standing, and adjusts the oxygen content in lower aerial drainage to pre- by oxygen content regulating system during standing
If stationary value, and monitoring system records the oxygen content gas and liquid containing oxygen amount in real time based on the parameter during standing
Situation of change.
Nuclear power plant of the invention holds control case deoxygenation test macro and method, has the advantages that survey of the invention
Test system provides the flow control of charging stream and lower aerial drainage, lower aerial drainage temperature is adjusted, the control of lower aerial drainage oxygen content, nitrogen supply with
And the functions such as gas discharge, these functions are based on, the test of " interval purges ", " build the pressure exhaust ", and the present invention may be implemented
Corresponding test method also is separately designed in the situation of different operating conditions with regard to " interval purges ", " build the pressure exhaust " respectively, with test
" interval purges ", " build the pressure exhaust " are obtained by test to the effect for holding control case deoxygenation and hold control case liquid level, single waiting time
With these key factors of single purge time to the affecting laws of " interval purges " deaerating effect；And it is stood by test
Affecting laws of the time to " build the pressure exhaust " deaerating effect；And the comparison of the test data by two methods, can obtain
" interval purges " and " the build the pressure exhaust " difference of two methods on deaerating effect, provide more for actual set deoxygenation Developing Tactics
Excellent data supporting.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings:
Fig. 1 is that primary Ioopsization hold system control principle drawing；
Fig. 2 is the structural schematic diagram that nuclear power plant of the present invention holds control case deoxygenation test macro.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give exemplary embodiments of the invention.But the invention can be realized in many different forms, however it is not limited to this paper institute
The embodiment of description.On the contrary, purpose of providing these embodiments is make it is more thorough and comprehensive to the disclosure.It answers
When understanding that the specific features in the embodiment of the present invention and embodiment are the detailed description to technical scheme, rather than
Restriction to technical scheme, in the absence of conflict, the technical characteristic in the embodiment of the present invention and embodiment can
To be combined with each other.
It should be noted that the terms such as " connected " or " connection " mentioned herein, not only include by two entities
It is connected directly, also includes being indirectly connected by having other entities beneficial to improvement.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
" first ", " second " used in this specification etc. includes that the term of ordinal number can be used for illustrating various constituent elements,
But these constituent elements are not limited by these terms.It is only that using the purpose of these terms and distinguishes a constituent element
In other constituent elements.For example, first constituent element can be named as under the premise of not departing from interest field of the invention
Two constituent elements, similarly, the second constituent element can also be named as the first constituent element.
It is the structural schematic diagram that nuclear power plant of the present invention holds control case deoxygenation test macro, physical circuit in figure with reference to Fig. 2, Fig. 2
Indicate that liquid line, dotted line route indicate gas line.It is mainly following that the nuclear power plant of the present embodiment holds control case deoxygenation test macro
Part includes: charge-letdown system, purge system, oxygen content regulating system, temperature control system, parameter monitoring system.
Charge-letdown system including buffer container, the liquid in the buffer container is imported under the appearance control case and is let out
Pipeline, by it is described hold control case liquid lead back to the buffer container on fill pipeline, on fill under let out control unit, control is let out under above filling
Unit processed be used to control lower aerial drainage in the letdown line and it is described on fill the flow and pressure of charging stream in pipeline,
In:
Purge system is connect with appearance control case, can be used for controlling case injection nitrogen to the appearance and the appearance is controlled case
Interior gas discharge；
Oxygen content regulating system is connect with the letdown line, can be used for injecting oxygen into the lower aerial drainage to adjust
Oxygen content in lower aerial drainage；
Temperature control system is connect with the buffer container, after being passed through heating into the liquid of the buffer container
Steam to adjust the fluid temperature；
Parameter monitoring system, for monitoring the lower aerial drainage and the flow of charging stream, pressure, oxygen content, and monitoring institute
State pressure, liquid level, oxygen content gas and the liquid containing oxygen amount held in control case.
In the present invention, hold control case and be consistent as tested component with physical device, specifically, holding control case is vertical hold
Pressure vessel, top and bottom is ball-shaped welded end enclosure structure, and in the present embodiment, multiple interfaces of top end socket are respectively used to connect
Related pipeline in letdown line and purge system, wherein the interface internal for accessing letdown line is provided with nozzle, core
When motor group is run, the coolant of primary Ioops enters appearance control case by letdown line, in the nozzle by holding control case inner top
It is atomized spray.The interface for holding control lower box part end socket fills pipeline on connecting, and the coolant held in control case passes through upper washing pipe line
Refill primary Ioops.
The five above system structures are described in detail respectively below.
In the present embodiment, charge-letdown system realizes buffering using buffer container, and buffer container uses floating roof structure or thin
The mode of film covering is sealed, to completely cut off influence of the outside air to oxygen content in buffer container.Buffer container, under let out pipe
Line, hold control case, on fill pipeline etc. and constitute a closed cycle, the side wall of buffer container is connected with setting inlet valve by top position
The back with water inlet line of V5, the side wall of buffer container are connected with the flowing line of setting drain valve V4 by top position, by control into
Water valve V5, drain valve V4 can inject corresponding liquid in buffer container, and in the present embodiment, buffer container is specially to buffer
Water tank.
In a feasible embodiment, it is described on fill under to let out control unit include following three parts:
1) be set to and fill on pipeline: above fill pump PO2, fill on described the pump upstream PO2 on fill isolating valve
033VP, the charging stream flow control valve 046VP that the pump downstream PO2 is filled on described.Preferably, the entrance of pump PO2 is filled on described
It is connected with a bypass line between outlet, a control valve for small flows V3 is provided on the bypass line.
2) be set on letdown line: under let out pump PO1, the upstream of pump PO1 is let out under described under let out isolating valve V1,
The lower aerial drainage pressure reducing valve 013VP in the pump downstream PO1 is let out under described.
Wherein, oxygen content regulating system described in the downstream connection of the lower aerial drainage pressure reducing valve 013VP, it is preferred that let out under
It flows and is provided with nozzle arrangements in the pipeline in the downstream pressure reducing valve 013VP, the gas of oxygen content regulating system discharge passes through the nozzle knot
Structure mixes gas in lower aerial drainage, realizes and controls the oxygen content of lower aerial drainage.
3) bypass line and the lower discharge flow regulating valve V2 being set on the bypass line, the bypass line connect
It is connected to the lower downstream aerial drainage pressure reducing valve 013VP (the specially position of access oxygen content regulating system and lower aerial drainage pressure reducing valve 013VP
Between outlet) and buffer container between, for let out under shunting pump PO1 outlet flow.
Preferably, it is additionally provided with draining bypass on letdown line, is let out with simulating to shunt down in real process using triple valve
Flow is flowed, specifically, the system also includes: drain valve 030VP1, flowing line and the drain valve being set on flowing line
030VP2, drain valve 030VP1 be located on letdown line access oxygen content regulating system position and it is described hold control case entrance it
Between, flowing line be connected to it is described under let out the downstream of pump PO1, specially access oxygen content regulating system position and drain valve
Between 030VP1.In addition, being also connected with a flowing line, the row by bottom position in the side wall for holding control case in the present embodiment
It is provided with drain valve V6 on water pipeline, can be used for draining.
With continued reference to Fig. 2, in a feasible embodiment, the purge system include equipped with nitrogen nitrogen cylinder,
Connect the nitrogen cylinder and the nitrogen purge line for holding control case, the pressure maintaining valve being set in the nitrogen purge line
024VZ, the connection exhaust line for holding control box top, the exhaust valve 286VY being arranged on the exhaust line.Specifically,
Nitrogen purge line, exhaust line are connect with two interfaces for holding control box top respectively, keep nitrogen pressure using pressure maintaining valve 024VZ
Power is constant, adjusts valve regulation nitrogen flow using exhaust valve 286VY.
With continued reference to Fig. 2, in a feasible embodiment, the oxygen content regulating system include: air compressor,
Aeration pipeline, the aeration flow control valve V7 being set on the aeration pipeline, hold control case air injection tube line, be set to it is described
Hold the appearance control case air injection valve V8 on control case air injection tube line, on the one hand the air compressor passes through the aeration pipeline
The pressure reducing valve 013VP downstream position of letdown line is connected, to carry out aeration control to lower aerial drainage to adjust containing in lower aerial drainage
Oxygen amount is provided with an aeration structure in figure on letdown line, aeration pipeline is connected to by aeration structure with letdown line,
And the gas in aeration pipeline is sprayed by the nozzle arrangements inside aeration structure in the liquid of letdown line.The air compression
On the other hand machine also controls case air injection tube line by the appearance and is indirectly connected with appearance control box top, hold on control case convenient for control
The air pressure of portion's gas compartment, to simulate in actual moving process before nitrogen purging, appearance control upper box part space is full of high pressure
The state of air.Specifically, appearance control case air injection tube line is connected to the downstream pressure maintaining valve 024VZ of the nitrogen purge line
Position.
With continued reference to Fig. 2, in a feasible embodiment, in the present embodiment, temperature control system is added using steam
Hot mode is heated, and is kept the temperature of water in entire test macro almost the same with real process, is maintained 46 DEG C.Specifically, packet
The heating pipeline for including electrically heated boiler, connecting with the side wall of buffer container heats the water in pipeline via electric heating pot stove heating
After be discharged into buffer container, buffer container is provided with nozzle with the interface that connect of heating pipeline in buffer container.
Preferably, the present embodiment further includes liquid injection system, and liquid injection system includes and the moisturizing holding control bottom portion and connecting
Pipeline, the deaeration plant being set in the water supply line, positioned at deaeration plant downstream small pump PO3, be located at deaeration plant
Isolating valve V9 between small pump PO3, the water compensating valve REA018VB positioned at the downstream small pump PO3.In the present embodiment, water supply pipe
Line is to be connect by above filling pipeline with control case is held, specifically, water supply line is connected to the position of the close appearance control case of water supply line,
In this way, in the upper manual moisturizing filled on pipeline and be arranged in water supply line simulation real process.
With continued reference to Fig. 2, in a feasible embodiment, the parameter monitoring system includes being arranged on described to fill
Under let out system, nitrogen purge system, oxygen regulating system and it is described hold control case in acquisition oxygen content, liquid level, flow, pressure
The various sensors of power, temperature data.Such as in Fig. 2, MP indicate pressure measurement sensor, MT indicate sensor for measuring temperature,
MD indicates that process measurement sensor, MG indicate that dissolved oxygen amount measurement sensor, 012MN indicate level sensor.As Fig. 2 can
See, fills pipeline, letdown line, nitrogen purge line, exhaust line, aeration pipeline, heating pipeline, water supply line, appearance control upper
Test point is all distributed in case, and above one or several kinds of sensors are arranged in each test point, and key testpoint is as follows:
The aerial drainage entrance in the case where holding control case is arranged the temperature, pressure of aerial drainage, flow under multiple sensors real-time measurement and is contained
Oxygen amount；
On holding control box body, gas sample pipeline is arranged, the gas for continuously measuring the appearance control case gas compartment is oxygen-containing
Amount；
On holding control box body, level sensor is arranged, for measuring the liquid level for holding control case.
Case exit is controlled holding, arranges temperature, pressure, flow and the oxygen content of multiple sensors real-time measurement charging stream.
It is understood that the control in the present invention to temperature, flow, pressure, liquid level, can be passed according to corresponding
The data of sensor monitoring carry out feedback control realization to corresponding control equipment (such as valve, electrically heated boiler etc.).Citing comes
It says, to control the stability of flow of lower aerial drainage in a certain setting flow value, then it can be according to the flow sensor on lower aerial drainage pipeline
The data on flows of monitoring carries out feedback control to lower discharge flow regulating valve: if the data on flows of monitoring indicates that flow is greater than setting
Flow value then turns down lower discharge flow regulating valve, conversely, lower discharge flow regulating valve is beaten greatly.Other temperature, pressure, liquid
Similarly, details are not described herein again for the control of position.
As it can be seen that the system of the present embodiment can be realized hold control case on fill letdown flow control, manual moisturizing control, under let out
The various functions such as flowing water temperature control system, the control of lower aerial drainage oxygen content, nitrogen supply and gas discharge.On the basis of these functions
On, test macro of the present invention can carry out multinomial test content, according to measurement condition difference, the test content mainly carried out
It see the table below shown in 1:
1 test content table of table
It can be understood that above each test content independently executes, test content one, two can provide theory can
For capable test data to provide reference to actual set deoxygenation strategy, test content three, four can provide practicable test
Data with to actual set deoxygenation strategy provide reference, moreover, test content three, four can preferably be test content one,
It is further tested on the basis of two data provided.Below for the above various test contents, corresponding side is provided respectively
Method embodiment.
Corresponding with test content one, an embodiment of the method for the invention provides a kind of nuclear power plant's appearance control case deoxygenation test
Method is realized based on system embodiment above-mentioned.
The method of the present embodiment includes: that the multiple groups value based on test parameter executes multiple test experiments, is tested each time
Experiment takes one group of value of the test parameter to execute, and test parameter includes: test liquid level L, single waiting time T and single
Evacuation time t.That is, the present embodiment with regard to L, T, t provide n (n >=2) kind value: [L1, T1, t1], [L2, T2, t2],
[L3, T3, t3] ... [Ln, Tn, tn] has carried out a test experiments for each group of value, below with one group of value therein
For [Li, Ti, ti], the test experiments are discussed in detail, test experiments include:
Preparation process: there is regulation oxygen content W to injection in control case is held1Demineralized water, and pass through steam-heating system will
The temperature of liquid maintains constant in appearance control case.Specifically, the injection of demineralized water can be injected from buffer container, the present embodiment is excellent
It is selected as injecting after deaeration plant from water supply line by closing.
Testing procedure one: the liquid level that will hold control case is adjusted to the test liquid level Li, by letting out control under filling on described singly
The flow control of lower aerial drainage and charging stream is zero by member, and the appearance is controlled pressure in case by the purge system and maintains first
Preset pressure.
Specifically, be zero by the flow control of lower aerial drainage and charging stream, be by filled on keeping pump and under let out pump shutdown, together
When close on fill isolating valve 033VP and under let out isolating valve V1 realization.It is to pass through that pressure, which maintains the first preset pressure, in appearance control case
Pressure maintaining valve 024VZ in nitrogen purge line is realized.
It will additionally be appreciated that the relevant equipment of other unmentioned pipelines is at closing if not otherwise specified
State, such as the relevant air compressor of aeration pipeline, regulating valve V7 etc., similarly, there are also other flowing lines, water supply line
It is all for closed state etc. relevant equipment.
Testing procedure two: executing interval purging until the parameter monitoring system monitors oxygen content gas in appearance control case and reaches
To stabilization, the interval purging includes: to pass through described in purge system control at interval of single waiting time Ti
The gas held in control case is once vented according to the single evacuation time ti, namely one single waiting time of interval
Ti opens an exhaust valve 286VY, and the time that exhaust valve 286VY is opened every time is up to ti.
It should be noted that will lead to the lower aerial drainage entirely recycled, charging stream during purging, hold liquid in control case,
Holding the oxygen content variation of gas in control case, final line interval purging, which finishes, can reach a dynamic equilibrium, when reaching balance, buffering
Liquid in container, lower aerial drainage, charging stream, the oxygen content held liquid in control case, hold gas in control case can reach stable, moreover,
The oxygen content in the liquid in circulation is identical at this time.
Testing procedure three: determining the time TOi for executing interval purging, and monitoring system determination is being held based on the parameter
The variation for the liquid containing oxygen amount in the ranks having a rest in the appearance control case of purging front and back.
Specifically, controlling the W mentioned in liquid containing oxygen amount, that is, above-mentioned preparation process in case before executing interval purging1, according to
Above it will be appreciated that purging of in the ranks having a rest eventually, which finishes, can reach a dynamic equilibrium, it is possible to be monitored by dissolved oxygen amount measurement sensor
To the liquid containing oxygen amount W held in control case2i, then executing interval purging front and back to hold the variation of the liquid containing oxygen amount in control case is Δ Wi=
W1-W2i。
That is, in the time TOi and content control this period case of the available execution interval purging of the present embodiment
Liquid containing oxygen amount variation be Δ Wi, the two data are the deaerating effect that can be shown that interval purging, because different batches
Result data Toi, Δ W acquired in test experimentsiDifference, so being based on calculating formula It is calculated every
Hold the variable quantity Xi of liquid containing oxygen amount in control case when in test experiments obtained unit time as oxygen removal efficiency
Judge index.Then the obtained Xi of the test experiments of more all batches can determine the best primary test of deaerating effect
Experiment, then the value for the test parameter that the secondary test experiments are based on may be considered an optimal value.
Corresponding with test content two, another embodiment of the method for the invention provides a kind of nuclear power plant's appearance control case deoxygenation survey
Method for testing realizes, the method for the present embodiment includes the following steps: based on system embodiment above-mentioned
Preparation process: the water after deoxygenation is injected in control case to holding, and liquid in control case will be held by steam-heating system
The temperature of body maintains constant.In the present embodiment, preferably by deaeration plant is opened, injected from water supply line into appearance control case
Water after deoxygenation.
Testing procedure one: the stability of flow of the charging stream is maintained by letting out control unit under filling on described and maintains institute
Flow, the pressure for stating lower aerial drainage are stable, and the appearance is controlled pressure in case by the purge system and maintains the second preset pressure；
Specifically, on the one hand, fill pump in starting and open valve 033VP, and regulating valve 046VP maintains the flow of charging stream steady
It is fixed, on the other hand, pump is let out under starting and opens valve V1, V2,013VP, 030VP1, and regulating valve V2 and 013VP maintain lower aerial drainage
Flow and pressure stablize；Adjusting the pressure maintaining valve 024VZ in nitrogen purge line maintains pressure in appearance control case to maintain second in advance
If pressure.
Testing procedure two: the oxygen content in lower aerial drainage is adjusted to pre-determined stability value W by oxygen content regulating system1；
Specifically, starting air compressor, and regulating valve V7, it is supervised according to the dissolved oxygen amount measurement sensor held at control tank inlet
The oxygen content in lower aerial drainage is surveyed, finally stablizes the oxygen content in lower aerial drainage in pre-determined stability value W1.With former approach embodiment
Similarly, the present embodiment finally can also reach a dynamic equilibrium, and when reaching balance, interior liquid, charging stream, holds control case at lower aerial drainage
Interior liquid, the oxygen content for holding gas in control case can reach stable, and the oxygen content in the liquid in circulation is identical at this time
All be W1, we can record the oxygen content gas for holding overhead gas space in control case at this time, it is assumed that be W1a。
Testing procedure three: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case is lifted to the first liquid level, and the gas held in control case is discharged by the purge system and the appearance is made to control case
Interior pressure maintains third preset pressure.
Specifically, the first liquid level is generally 90% water level, by the flow of the adjustable charging stream of regulating valve 046VP, lead to
The flow of the adjustable lower aerial drainage of valve V2 is overregulated, we can control by the method so that charging stream flow is less than lower aerial drainage
Flow is then turned on exhaust valve 286VY, pressure reduction in the appearance control case to be stepped up appearance control case water level to 90% water level
To third preset pressure, exhaust valve 286VY is closed.
Testing procedure four: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case reduces and maintains the second liquid level.
Specifically, the second liquid level is generally 50% water level, similarly, we can be made by regulating valve 046VP, V2, control
It obtains charging stream flow and is greater than lower discharge flow, gradually reduce appearance control case water level to 50% water level.
Testing procedure five: standing, and adjusts the oxygen content in lower aerial drainage to pre- by oxygen content regulating system during standing
If stationary value W1, adjustment process can be with reference to the elaboration of above-mentioned testing procedure two；And it is monitored based on the parameter during standing
System records the situation of change of the oxygen content gas and liquid containing oxygen amount in real time.
Assuming that the data of the liquid containing oxygen amount recorded are [Tsi, w during entire standing2i], oxygen content gas
Data are [Tsi, w2ai], i≤N, N indicate the entire record number for standing process, when Tsi indicates standing when i-th records
Between, W2iIndicate the liquid containing oxygen amount that i-th is recorded, W2aiIndicate the oxygen content gas that is recorded of i-th, then it is available not
The variation of the same corresponding liquid containing oxygen amount of time of repose Tsi is Δ Wi=W1-W2i, different standings can so be calculated
The oxygen removal efficiency of the corresponding liquid containing oxygen amount of time Tsi isSimilarly, the oxygen removal efficiency of oxygen content gas isThen Xi or Xai corresponding to more all time of repose Tsi, that is, can determine that deaerating effect is optimal
Time of repose.
It is understood that the example above be optimal time of repose is selected with the processing mode of discrete data, in fact,
The functional relation between Xai and Tsi can also be obtained by curve matching, then find the corresponding standing of maximum of function
Time.
Above-mentioned discrete data analysis point is sent out in turn,
Corresponding with test content three, another embodiment of the method for the invention provides a kind of nuclear power plant's appearance control case deoxygenation survey
Method for testing realizes that the method for the present embodiment includes: that the multiple groups value based on test parameter is executed based on system embodiment above-mentioned
Multiple test experiments, test experiments take one group of value of the test parameter to execute each time, and test parameter includes: test liquid level
L, single waiting time T and single evacuation time t.
With the corresponding embodiment of the method for test content one, below by taking one group of value of test parameter as an example, this is discussed in detail
The test experiments of embodiment, test experiments include:
Preparation process: there is the demineralized water for providing oxygen content to injection in control case is held, and will be held by steam-heating system
The temperature of liquid maintains constant in control case.It can specifically be walked with reference to the preparation of the corresponding embodiment of the method part of test content one
Suddenly, details are not described herein again.
Testing procedure one: the liquid level that will hold control case is adjusted to the test liquid level, by letting out control unit under filling on described
It maintains the stability of flow of the charging stream and the flow of the lower aerial drainage, pressure is maintained to stablize, it will by the purge system
The gas held in control case is discharged and pressure in the appearance control case is made to maintain the 4th preset pressure；
Specifically, on the one hand, fill pump in starting and open valve 033VP, and regulating valve 046VP maintains the flow of charging stream steady
It is fixed, on the other hand, pump is let out under starting and opens valve V1, V2,013VP, 030VP1, and regulating valve V2 and 013VP maintain lower aerial drainage
Flow and pressure stablize；Adjusting the pressure maintaining valve 024VZ in nitrogen purge line maintains pressure in appearance control case to maintain the 4th in advance
If pressure.
Testing procedure two: executing interval purging until the parameter monitoring system monitors oxygen content gas in appearance control case and reaches
To stabilization, the interval purging includes: to control the appearance by the purge system at interval of a single waiting time
Gas in control case is once vented according to the single evacuation time.The corresponding method of test content one can specifically be referred to
The testing procedure three of embodiment part, details are not described herein again.
Testing procedure three: determining the time for executing interval purging, and monitoring system determination is executing based on the parameter
Interval purging front and back holds the variation of the liquid containing oxygen amount in control case.The corresponding embodiment of the method for test content one can specifically be referred to
Partial testing procedure four, details are not described herein again.
Corresponding with test content four, another embodiment of the method for the invention provides a kind of nuclear power plant's appearance control case deoxygenation survey
Method for testing realizes, the method for the present embodiment includes the following steps: based on system embodiment above-mentioned
Preparation process: the water after deoxygenation is injected in control case to holding, and liquid in control case will be held by steam-heating system
The temperature of body maintains constant；The preparation process of the corresponding embodiment of the method part of test content two can be specifically referred to, herein
It repeats no more.
Testing procedure one: the stability of flow of the charging stream is maintained by letting out control unit under filling on described and maintains institute
Flow, the pressure for stating lower aerial drainage are stable, and the appearance is controlled pressure in case by the purge system and maintains the 5th preset pressure.
The testing procedure one of the corresponding embodiment of the method part of test content two can be specifically referred to, details are not described herein again.
Testing procedure two: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case is lifted to the first liquid level, and the gas held in control case is discharged by the purge system and the appearance is made to control case
Interior pressure maintains the 6th preset pressure.The testing procedure of the corresponding embodiment of the method part of test content two can specifically be referred to
Three, details are not described herein again.
Testing procedure three: charging stream is controlled by letting out control unit under filling on described, the flow of lower aerial drainage is controlled so that holding
The liquid level of case reduces and maintains the second liquid level.The test of the corresponding embodiment of the method part of test content two can specifically be referred to
Step 4, details are not described herein again.
Testing procedure four: standing, and adjusts the oxygen content in lower aerial drainage to pre- by oxygen content regulating system during standing
If stationary value, and monitoring system records the oxygen content gas and liquid containing oxygen amount in real time based on the parameter during standing
Situation of change.The testing procedure five of the corresponding embodiment of the method part of test content two can be specifically referred to, it is no longer superfluous herein
It states.
In conclusion nuclear power plant of the invention holds control case deoxygenation test macro and method, this is had the advantages that
The test macro of invention provides the flow control of charging stream and lower aerial drainage, lower aerial drainage temperature is adjusted, the control of lower aerial drainage oxygen content, nitrogen
The functions such as gas supply and gas discharge, are based on these functions, and the test of " interval purges ", " build the pressure exhaust " may be implemented, and
And the present invention has also separately designed corresponding test side in the situation of different operating conditions with regard to " interval purges ", " build the pressure exhaust " respectively
Method with test " interval purges ", " build the pressure exhaust " to the effect for holding control case deoxygenation, and is obtained by test and holds control case liquid level, list
The affecting laws of secondary waiting time and these key factors of single purge time to " interval purges " deaerating effect；And pass through survey
Examination obtains time of repose to the affecting laws of " build the pressure exhaust " deaerating effect；And the ratio of the test data by two methods
Compared with " interval purge " and " the build the pressure exhaust " difference of two methods on deaerating effect can be obtained, for actual set deoxygenation plan
Slightly adjustment provides more preferably data supporting.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (10)
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