CN111551482B - Comprehensive dynamic water corrosion test device with high-temperature and high-pressure one-loop and two-loop linkage operation - Google Patents
Comprehensive dynamic water corrosion test device with high-temperature and high-pressure one-loop and two-loop linkage operation Download PDFInfo
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Abstract
The invention discloses a comprehensive flowing water corrosion test device and a test method thereof with high-temperature and high-pressure one-loop and two-loop linkage operation, wherein the test device comprises a loop system and a two-loop system; the first loop system and the second loop system comprise main loop systems; the system comprises a loop system, a main pump, a pressure stabilizer, a plurality of simulators, a plurality of pressure sensors, a pressure sensor, a pressure controller, a pressure sensor and a pressure controller, wherein the loop system is a closed loop system, the pressure stabilizer is arranged at the inlet of the main pump to realize prototype simulation of loop pressure in a steam pressure stabilizing mode, and the main loop system of the loop system forms a multi-loop system through the serial and/or parallel connection of a plurality of simulators and various devices to realize simulation of different test parameters of various simulators; the two-loop system realizes prototype simulation of the pressure of the two loops through a pressure stabilizing device; the main loop system of the two-loop system realizes the simulation of different test parameters of the secondary side of the steam generator simulation body. The method can simulate the operating conditions of the first loop and the second loop of the nuclear reactor and the water chemistry process conditions to carry out corrosion test evaluation, and is beneficial to searching effective solving strategies for safe and reliable operation of a nuclear reactor system.
Description
Technical Field
The invention relates to the technical field of nuclear energy, in particular to a comprehensive dynamic water corrosion test device with high-temperature and high-pressure one-loop and two-loop linkage operation.
Background
The corrosion performance of the structural materials of the nuclear reactor, the typical structure of the key equipment and the manufacturing process thereof in the water chemistry environment is an important content of the research on the performance of the reactor materials, and is directly related to the integrity of the pressure boundary of the reactor coolant and the safe and reliable operation of the reactor system.
The corrosion mechanism of the material is different under the condition that the coolant flows in a dynamic high-speed circulation mode (flowing water condition) and under the condition that the coolant does not flow at rest (static water condition). The dynamic water corrosion test is the most effective technical means for performing out-of-pile engineering simulation and in-depth research on material corrosion at present, can simulate the temperature, pressure, flow rate and water chemical environment of equipment and materials to perform long-term corrosion test on nuclear reactor structural materials, and can also research the physicochemical behaviors of migration, deposition, hiding, return and the like of the corrosion products in a test area by adding concerned corrosion product components into a medium, thereby being beneficial to mastering the corrosion behavior of the materials and the water chemistry transition rule and being beneficial to searching corresponding effective engineering solution strategies.
According to the characteristics of prototype service environment of the nuclear reactor structural material, a targeted research party can be developed to obtain representative engineering experiment data and provide technical support for engineering application. Therefore, simulating the operation condition conditions of the first loop and the second loop of the nuclear reactor and the water chemistry process conditions to carry out corrosion test evaluation is an essential important link in the research of nuclear reactor structural materials, typical structures of key equipment and manufacturing processes of the typical structures.
Disclosure of Invention
The invention provides a comprehensive dynamic water corrosion test device with high temperature and high pressure and one-and-two loop linkage operation, which can realize simultaneous simulation of various key equipment materials and different prototype thermal parameters of typical structures of a reactor and simulation of various water chemical environments of a one-and-two loop system.
The invention is realized by the following technical scheme:
the comprehensive dynamic water corrosion test device comprises a high-temperature high-pressure first loop and a high-temperature high-pressure second loop which are operated in a linkage manner, wherein the test device comprises a first loop system and a second loop system; the first loop system and the second loop system comprise main loop systems; the system comprises a loop system, a main pump, a pressure stabilizer, a plurality of simulators, a plurality of pressure sensors, a pressure sensor, a pressure controller, a pressure sensor and a pressure controller, wherein the loop system is a closed loop system, the pressure stabilizer is arranged at the inlet of the main pump to realize prototype simulation of loop pressure in a steam pressure stabilizing mode, and the main loop system of the loop system forms a multi-loop system through the serial and/or parallel connection of a plurality of simulators and various devices to realize simulation of different test parameters of various simulators; the two-loop system realizes prototype simulation of the pressure of the two loops through a pressure stabilizing device; the main loop system of the two-loop system realizes the simulation of different test parameters of the secondary side of the steam generator simulation body.
Preferably, the main loop system of the loop system comprises a primary side of a steam generator simulator, a simulator A, a simulator B, a simulator C, a main pump, a main heater, a preheater and a loop voltage stabilizer; the test medium is heated by the main heater from the outlet of the main pump and then is divided into two branches, the test medium of the first branch enters the analog body A after flow regulation, the outlet medium part of the analog body A is shunted to the primary side of the analog body of the steam generator, and the rest media are mixed with the outlet medium of the analog body B and the outlet medium of the primary side of the analog body of the steam generator after flow regulation and then return to the inlet of the main pump; the test medium of the second branch enters the simulator C after flow regulation, then enters the simulator B after being heated by the preheater for the second time, and the outlet medium of the simulator B is mixed with the flow-dividing medium of the simulator A and the outlet medium of the primary side of the simulator of the steam generator and then returns to the inlet of the main pump.
Preferably, the primary loop system further comprises a primary loop water quality adjusting system, wherein the primary loop water quality adjusting system comprises cooling equipment, a purifying module, a primary loop water supplementing pump, a primary loop water supplementing preparation module and a primary loop dosing pipeline; part of medium which is shunted from the outlet of the main pump is cooled by cooling equipment, enters the water quality purification module for purification and then returns to the inlet of the main pump; make-up water prepared by a loop make-up water preparation module is made up into a loop system through a loop make-up water pump; and a loop dosing pipeline is arranged at the inlet of a loop water replenishing pump and is used for adding chemical agents.
Preferably, flow measuring equipment and temperature measuring equipment are arranged at an outlet of cooling equipment in a loop water quality regulating system to obtain a real-time flow value and a real-time temperature value of a test medium of a purification module, and the real-time flow value and the real-time temperature value are used for guiding the opening regulation of a valve at an inlet of the purification module; setting pressure measuring equipment in a main loop system of a loop system to obtain a real-time pressure value for guiding the power regulation of a loop voltage stabilizer, so that the pressure of the loop system is the same as that of a prototype; arranging temperature measuring equipment at the inlet of each simulation body to obtain a real-time temperature value for guiding the power regulation of the main heater and the preheater so that the test temperature of each simulation body is the same as that of the prototype; flow measuring equipment is respectively arranged at the serial loop of the simulator B and the simulator C, the inlet of the simulator A and the inlet of the primary side of the steam generator simulator to obtain a real-time flow value for guiding the adjustment of the opening of each valve, so that the test flow rate of each simulator is the same as that of the prototype.
Preferably, the main loop system of the two-loop system comprises a steam generator analog body secondary side, a condensate pump, a condenser, a mixer and a two-loop voltage stabilizer; the test medium is divided into two branches after coming out of the secondary side outlet of the steam generator simulator, the test medium of the first branch enters the mixer after being condensed by the condenser and then being subjected to flow regulation, and the test medium of the second branch directly enters the mixer after being subjected to flow regulation; the test media of the two branches are mixed in the mixer, then are regulated by the two-loop pressure stabilizing device, and then are driven by the condensate pump to enter the secondary side of the steam generator simulator.
Preferably, pressure measuring equipment is arranged at an inlet of a secondary side of a steam generator simulator to obtain a real-time pressure value, and the real-time pressure value is used for guiding the power regulation of the two-loop voltage stabilizer, so that the pressure of a two-loop system is the same as that of a prototype; temperature measuring equipment is respectively arranged at an outlet and an inlet of the secondary side of the steam generator simulation body to obtain real-time temperature values for guiding the flow ratio adjustment of the gas side and the liquid side of the mixer and the adjustment of the cooling water flow of the condenser, so that the temperature of the inlet of the secondary side of the steam generator simulation body is the same as that of the prototype; and arranging flow measuring equipment at the inlet of the secondary side of the steam generator simulation body to obtain a real-time flow value for guiding the adjustment of the opening of the valve, so that the flow of the secondary side of the steam generator simulation body is the same as that of the prototype.
Preferably, the two-loop system further comprises a two-loop water quality adjusting system, wherein the two-loop water quality adjusting system comprises a sewage discharge module, a two-loop water replenishing pump, a two-loop water replenishing preparation module and a two-loop dosing pipeline; part of medium led out from the secondary side of the steam generator analog body is cooled and depressurized by a pollution discharge module and then is discharged; make-up water prepared by the two-loop make-up water preparation module is made up into a secondary loop system through a two-loop make-up water pump; the inlet of the two-loop water replenishing pump is provided with a two-loop dosing pipeline for adding chemical agents.
Preferably, the loop system and the two-loop system further comprise an online monitoring system, and the online monitoring system is used for monitoring the water chemical parameters of the loop system in real time and adjusting the test medium of the loop system according to the monitoring result of the water chemical parameters.
Preferably, the first loop system and the second loop system of the invention are both provided with an artificial sampling pipeline, the front end of the water quality purification module of the first loop system is provided with the artificial sampling pipeline, and the artificial sampling pipeline of the second loop system is a discharge port of the sewage discharge module.
Preferably, the on-line monitoring system of the present invention includes a dissolved oxygen measuring instrument, a dissolved hydrogen measuring instrument, a conductivity measuring instrument, a pH measuring instrument, and an ion concentration analyzing instrument.
The invention also provides a test method based on the comprehensive flowing water corrosion test device, and the test method comprises a primary loop system test and a water chemical environment simulation and test of a secondary loop system.
Preferably, the simulation and testing of the water chemistry environment of the primary loop system of the present invention comprises the steps of:
step S11, preparing deoxygenated water in advance by adopting a make-up water preparation module;
step S12, measuring the primary loop dissolved oxygen through an online monitoring system of the primary loop system, and calculating the addition of the deoxidant according to the measurement result; injecting a deoxidant into the primary loop through a dosing pipeline of the primary loop water quality adjusting system to carry out constant-temperature deoxidization, and monitoring the oxygen concentration through an online monitoring system of the primary loop system until the dissolved oxygen concentration is reduced to a required range;
step S13, after the deoxidization is qualified, a water quality purification module in a primary loop water quality regulation system is started to remove residual deoxidization agent;
step S14, after the residual deoxidant is removed, injecting a test medium into the primary loop system through a water replenishing pump and a dosing pipeline in the primary loop water quality adjusting system to simulate a test water chemical environment required by the primary loop system;
step S15, in the test operation, continuously or periodically monitoring the primary loop water chemical parameters through an online monitoring system of the primary loop system, sampling and analyzing through a manual sampling port if necessary, and adjusting the primary loop test medium according to the water chemical parameter measurement result;
step S16, in the test process, a flow measuring device and a temperature measuring device arranged at an outlet of a cooling device in a loop water quality regulating system are used for obtaining a real-time flow value and a temperature value of a test medium flowing through a water quality purification module, and guiding the opening regulation of a valve at an inlet of the water quality purification module to enable the purification flow to meet the requirement, and meanwhile, the purification column is prevented from losing effectiveness due to overhigh temperature at the inlet of the water quality purification module; real-time pressure values are obtained through a loop main loop pressure measuring device, and power regulation of a loop voltage stabilizer is guided, so that the loop system pressure is the same as the original pressure; obtaining a real-time temperature value through temperature measuring equipment arranged at an inlet of the test simulation body, and guiding power regulation of the main heater and the preheater to enable the test temperature of the test simulation body to be the same as that of the prototype; the real-time flow value is obtained through a serial loop of the simulator body B and the simulator body C, flow measuring equipment arranged at an inlet of the simulator body A and an inlet of a primary side of the steam generator simulator body, and the opening adjustment of the valve is guided, so that the test flow rate of the test simulator body is the same as that of a prototype.
Further, in step S15 of the present invention, the adjusting the primary loop test medium according to the water chemistry parameter measurement result specifically includes: when the measurement result of the chemical ion concentration parameter is lower, the dosing operation is carried out; and when the measurement result is higher, performing purification operation.
Preferably, the simulation and testing of the water chemistry environment of the two-circuit system of the present invention comprises the steps of:
step S21, preparing deoxygenated water in advance by adopting a two-loop make-up water preparation module;
step S22, injecting test agents into the two-loop system through a dosing pipeline of the two-loop water quality adjusting system, and simulating a water chemistry environment required by the test of the two-loop system;
step S23, in the test operation, the on-line monitoring system of the two-loop system continuously or periodically monitors the water chemistry parameters of the two-loop system, if necessary, the discharge port of the pollution discharge module performs sampling analysis, and the two-loop test medium is adjusted according to the measurement result of the water chemistry parameters;
step S24, in the test process, obtaining a real-time pressure value through a pressure measuring device arranged at the secondary side inlet of the steam generator simulator, and knowing the adjustment of the two-loop pressure stabilizing device to ensure that the pressure of the two-loop system is the same as that of the prototype; obtaining a real-time temperature value through temperature measuring equipment arranged at an inlet of the secondary side of the steam generator simulator, and guiding the flow ratio regulation of the gas side and the liquid side of the mixer and the regulation of the cooling water flow of the condenser to ensure that the temperature of the inlet of the secondary side of the steam generator simulator is the same as that of the prototype; and (3) obtaining a real-time flow value through flow measuring equipment arranged at an inlet of the secondary side of the steam generator, and guiding the adjustment of the opening of a valve to ensure that the flow of the secondary side of the steam generator is the same as that of the prototype.
Further, in step S24 of the present invention, the adjusting the two-loop test medium according to the measurement result of the water chemistry parameter is specifically: when the measurement result of the chemical ion concentration parameter is lower, the chemical adding operation is carried out, and when the measurement result is higher, the pollution discharge and water supplement operation is carried out; when the measurement result of the dissolved oxygen concentration is higher, accurately calculating the addition amount of the deoxidant according to the measurement result, and adding the deoxidant for adjustment; when the pH measurement result is higher or lower, the pH value is adjusted by adding different test agents.
The invention has the following advantages and beneficial effects:
the invention provides a comprehensive flowing water corrosion test device for high-temperature and high-pressure one-loop and two-loop linkage operation, which can simulate the operation working conditions of the first loop and the second loop of a nuclear reactor and the water chemistry process conditions to carry out corrosion test evaluation, is beneficial to mastering the material corrosion behavior and the water chemistry transition law, and is beneficial to searching effective solving strategies for safe and reliable operation of a nuclear reactor system.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of the structure of the device of the present invention.
In the figure: 1. a valve I; 2. a flow measuring device I; 3. a valve II; 4. a pressure measurement device I; 5. a temperature measuring device I; 6. a steam generator analog body; 7. a pollution discharge module; 8. a condensate pump; 9. a temperature measuring device II; 10. a flow measuring device II; 11. a mimic A; 12. a valve III; 13. a mimic body B; 14. a valve IV; 15. a temperature measuring device III; 16. a preheater; 17. a flow measuring device III; 18. a temperature measuring device IV; 19. a mimetic C; 20. a valve V; 21. a flow measuring device IV; 22. a main heater; 23. a pressure measurement device II; 24. a main pump; 25. a primary circuit water replenishing pump; 26. a valve VI; 27. a loop voltage regulator; 28. a cooling device; 29. a flow measuring device V; 30. a temperature measuring device V; 31. a purification module; 32. a manual sampling pipeline; 33. a loop on-line monitoring system; 34. a primary loop make-up water preparation module; 35. a loop dosing line; 36. a second loop dosing pipeline; 37. a second loop make-up water preparation module; 38. a second loop water replenishing pump; 39. a mixer; 40. a two-circuit voltage stabilizer; 41. a second loop online monitoring system; 42. a valve VIII; 43. a condenser.
Detailed Description
Hereinafter, the term "comprising" or "may include" used in various embodiments of the present invention indicates the presence of the invented function, operation or element, and does not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to mean that the specified features, numbers, steps, operations, elements, components, or combinations of the foregoing, are only meant to indicate that a particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to the possibility of, one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing.
In various embodiments of the invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
The embodiment provides a comprehensive dynamic water corrosion test device with high-temperature and high-pressure one-loop and two-loop linkage operation. The test device comprises a loop system and a secondary loop system, corrosion test evaluation is carried out by simultaneously simulating various key equipment materials and different prototype thermal parameters of a typical structure of the nuclear reactor and simulating various water chemical environments of the primary loop system and the secondary loop system, and effective engineering solution measures are provided for the integrity of a coolant pressure boundary of the nuclear reactor and the safe and reliable operation of the reactor system.
The primary circuit system of the embodiment is a closed-loop system, and a pressure stabilizer is arranged at the inlet of the primary pump to realize the prototype simulation of the primary circuit pressure in a steam pressure stabilizing mode.
The loop system of this embodiment includes major loop system, and the major loop system of loop system forms multi-loop system through the series-parallel connection relation of multiple analog body and all kinds of equipment, has realized the prototype simulation of the different temperatures of all kinds of experimental analog bodies and flow, specifically is: the primary side of the steam generator simulator is connected with the reactor structural material simulator A in series to form a loop, the reactor structural material simulator B, the reactor structural material simulator C and the preheater are connected in series to form a loop, and the two loop parts are mutually connected in parallel. The realization method comprises the following steps: the test medium is heated by the main heater from the outlet of the main pump and then divided into two branches, the test medium of the first branch enters the reactor structural material simulator A after the flow is regulated by the valve, the outlet medium of the first branch is partially shunted to the primary side of the steam generator simulator, and the rest of the test medium is mixed with the outlet medium of the reactor structural material simulator B and the outlet medium of the primary side of the steam generator simulator after the flow of the rest of the test medium is regulated by the valve and returns to the inlet of the main pump. The test medium of the second branch enters a reactor structural material simulator C after the flow of the test medium is regulated by a valve, then enters a reactor structural material simulator B after being heated secondarily by a preheater, and the outlet medium returns to the inlet of the main pump after being converged with the split medium of the reactor structural material simulator A and the outlet medium of the primary side of the steam generator simulator.
In this embodiment, the primary loop system further includes a primary loop water quality adjusting system and a primary loop water quality on-line monitoring system 33.
The primary loop water quality adjusting system can realize the simulation of various water chemical environments of the primary loop system through various modes such as purification, water supplement, medicine addition and the like. The purification scheme specifically comprises the following steps: part of medium shunted from the outlet of the main pump is cooled by cooling equipment, enters the water quality purification module for purification, and finally returns to the inlet of the main pump. The water replenishing scheme specifically comprises the following steps: make-up water prepared by the make-up water preparation module is supplemented into the loop system through a make-up water pump. The dosing scheme specifically comprises the following steps: the inlet of the water replenishing pump is provided with a chemical adding port for adding chemical agents.
The loop water quality online monitoring system 33 can realize online detection and manual sampling of pH, conductivity, dissolved hydrogen, dissolved oxygen and various ions, wherein the online monitoring can adopt a plurality of modes such as in-line and on-line. The method specifically comprises the following steps: the water quality in the pipeline or the equipment is continuously or regularly monitored by various online water chemistry monitoring instruments arranged on the pipeline or the equipment; the cold end of the loop system is provided with a sampling port to manually sample the water quality of the loop system.
As shown in fig. 1, the main loop system of the loop system includes: the primary side of the steam generator simulator 6, the simulator A11, the simulator B13, the simulator C19, the main pump 24, the main heater 22, the preheater 16 and the loop voltage stabilizer 27. Specifically, in a loop system, a test medium is heated by a main heater 22 from an outlet of a main pump 24 and then is divided into two branches, the test medium of the first branch enters a simulator A11 after the flow of the test medium is regulated by a valve IV 14, part of the outlet medium of the first branch is branched to the primary side of a steam generator simulator 6, and the rest of the test medium is mixed with the outlet medium of a simulator B13 and the outlet medium of the primary side of the steam generator simulator 6 after the flow of the test medium is regulated by a valve III 12 and returns to an inlet of the main pump 24. The test medium of the second branch enters a simulator C19 after the flow rate of the test medium is regulated by a valve V20, then enters a simulator B13 after being heated by a preheater 16 for the second time, and the outlet medium returns to the inlet of the main pump 24 after being merged with the medium of the branch flow of the simulator A11 and the outlet medium of the primary side of the steam generator simulator 6.
A primary loop water quality adjusting system includes: cooling equipment 28, a purification module 34, a primary loop make-up water preparation module 34; a primary dosing line 35. The method specifically comprises the following steps: part of the medium which is branched from the outlet of the main pump 24 is cooled by the cooling equipment 28, enters the water quality purification module 31 for purification, and finally returns to the inlet of the main pump 24; make-up water prepared by the primary circuit make-up water preparation module 34 is made up into the loop system by the primary circuit make-up water pump 25; and a dosing pipeline 35 is arranged at the inlet of the water replenishing pump 25 and is used for adding chemical agents.
In a further preferred embodiment, the loop system further comprises a temperature measuring device II 9, a flow measuring device II 10, a valve III 12, a valve IV 14, a temperature measuring device III 15, a flow measuring device III 17, a temperature measuring device IV 18, a valve V20, a flow measuring device IV 21, a pressure measuring device II 23, a valve VI 26, a flow measuring device V29 and a temperature measuring device V30.
The loop system in this embodiment specifically operates as follows:
1) preparing deoxygenated water in advance by adopting a make-up water preparation module 34; in this embodiment, the primary loop make-up water preparation module 34 adopts, but is not limited to, bubbling deoxygenation, dosing deoxygenation, and other manners.
2) Measuring the dissolved oxygen in the primary loop by using a primary loop water quality online monitoring system 33, and calculating the addition of a deoxidant (the deoxidant adopts, but is not limited to hydrazine hydrate) according to the measurement result; the oxygen scavenger is injected into the primary loop through a dosing pipeline 35 of the primary loop water quality regulating system to carry out constant-temperature oxygen removal, and the oxygen concentration is monitored through a primary loop water quality online monitoring system 33 until the dissolved oxygen concentration is reduced to a required range.
In this embodiment, the method for calculating the amount of oxygen scavenger added is as follows:
in the formula, VN2H4·H2O-hydrazine reagent addition, mL; m is1-the mass of the primary loop aqueous solution, kg; cO2-measuring the concentration of dissolved oxygen in the primary circuit, mg/kg; rhoN2H4·H2OThe density of the hydrazine reagent, g/mL, is 1.032 g/mL; 80% — volume content of hydrazine hydrate in the reagent; 32-molar mass of oxygen, g/mol; 50-molar mass of hydrazine hydrate, g/mol; 1000-conversion of units of mg to g; k is the correction factor.
3) After the deoxidization is qualified, a water quality purification module 31 in a primary loop water quality regulation system is started to remove residual deoxidization agent;
4) after the residual deoxidant is removed, test media are injected into the primary loop system through a water replenishing pump 25 and a medicine adding pipeline 35 in the primary loop water quality adjusting system to simulate the test water chemical environment required by the primary loop system.
In this embodiment, the method for calculating the amount of reagent added is as follows:
in the formula, m represents the mass of the added reagent and g represents the mass of the added reagent; m is1-mass of loop water, kg; c is the test requirement value of the main element, mg/kg; x% — reagent purity; k is the molar mass ratio of the main element to the reagent; 1000-conversion of mg to g units.
5) In the test operation, various parameters (such as pH, conductivity, ion concentration and the like) of the primary loop water chemistry are continuously or periodically monitored by a primary loop online monitoring system 33, sampling analysis can be performed through a manual sampling port 32 if necessary, and a primary loop test medium is adjusted according to the measurement result of the water chemistry parameters, wherein the method comprises the following steps: when the measurement result of the chemical ion concentration parameter is lower, the dosing operation is carried out; and when the measurement result is higher, performing purification operation.
In this embodiment, when the water chemistry parameter is lower, the method for calculating the reagent addition amount is as follows:
in the formula, m is in need of supplementationThe amount of reagent of (a), g; m is1-mass of loop water, kg; c is the test requirement value of the main element, mg/kg; c1-the measured value of the main element, mg/kg; x% — reagent purity; k is the molar mass ratio of the main element to the reagent; 1000-conversion of mg to g units.
When the water chemistry parameter is higher, the calculation method of the purification time comprises the following steps:
wherein t is the purification time, h; c1-the measured value of the main element, mg/kg; c is the test requirement value of the main element, mg/kg; m is1-mass of aqueous circuit solution, kg; q is the purification flow rate, kg/h.
6) In the test process, a real-time flow value and a temperature value of a test medium flowing through the water quality purification module 31 are obtained through a flow measuring device V29 and a temperature measuring device V30 arranged at the outlet of a cooling device 28 in a loop water quality regulation system, the opening of a valve VI 26 at the inlet of the water quality purification module 31 is guided to be adjusted, the purification flow meets the requirement, and meanwhile, the temperature measuring device V30 avoids the purification column from being invalid due to overhigh temperature at the inlet of the water quality purification module 31; obtaining a real-time pressure value through a loop main loop pressure measuring device II 23, and guiding the power regulation of a loop voltage stabilizer 27 to ensure that the loop system pressure is the same as the original pressure; obtaining a real-time temperature value through a temperature measuring device II 9, a temperature measuring device III 15 and a temperature measuring device IV 18 arranged at an inlet of a test simulation body, and guiding power regulation of a main heater 22 and a preheater 16 to enable the test temperature of each simulation body to be the same as that of a prototype; real-time flow values are obtained through a serial loop of the simulator B13 and the simulator C19, and a flow measuring device III 17, a flow measuring device IV 21 and a flow measuring device II 10 which are arranged at an inlet of the simulator A11 and an inlet of a primary side of the steam generator simulator 6, and opening adjustment of the valve IV 14, the valve V20 and the valve III 12 is guided, so that the test flow rate of each simulator is the same as that of a prototype.
The two-loop system of the embodiment realizes prototype simulation of two-loop pressure through the pressure stabilizing device, and the further pressure stabilizing device can be a pressure stabilizer or back pressure equipment.
The two-loop system of the embodiment comprises a main loop system, and the scheme for realizing the prototype simulation of the secondary side temperature and the flow of the steam generator simulation body by the two-loop main loop system comprises the following steps: the test medium is divided into two branches after coming out of the secondary side outlet of the steam generator simulator, the test medium of the first branch enters the mixer after being condensed by the condenser and then the flow is regulated by the valve, and the test medium of the second branch directly enters the mixer after the flow is regulated by the valve; the test media of the two branches are mixed in the mixer and then are driven by the condensate pump to enter the secondary side of the steam generator analog body.
In another preferred embodiment, the two-circuit system further comprises a two-circuit water quality regulating system and a two-circuit water quality monitoring system 41.
The two-loop water quality adjusting system can realize the simulation of various water chemical environments of the two-loop system through various modes such as pollution discharge, water supplement, medicine addition and the like. The sewage discharge scheme specifically comprises the following steps: part of medium led out from the secondary side of the steam generator analog body is cooled and depressurized by a pollution discharge module and then is discharged; the water supplementing scheme and the medicine adding scheme are the same as those of a loop system.
The implementation scheme of the two-loop water quality online monitoring system 41 is the same as that of the one-loop system.
Specifically, as shown in fig. 1, the main loop system of the two-loop system includes: the secondary side of the steam generator simulator 6, a condensate pump 8, a mixer 39, a two-circuit pressure stabilizing device 40, a condenser 43 and a valve VIII 42. In the second loop system, the test medium is divided into two branches after coming out from the outlet of the secondary side of the steam generator simulator 6, the test medium of the first branch enters the mixer 39 after being condensed by the condenser 43 by adjusting the flow through the valve VIII 42, and the test medium of the second branch directly enters the mixer 39 after being adjusted by the valve I1; the test media of the two branches are mixed in the mixer 39 and then are driven by the condensate pump 8 to enter the secondary side of the steam generator simulator 6.
The two-circuit water quality adjusting system comprises: a secondary loop dosing pipeline 36, a secondary loop make-up water preparation module 37, a pollution discharge module 7 and a secondary loop make-up water pump 38. The method specifically comprises the following steps: part of medium led out from the secondary side of the steam generator analog body 6 is cooled and depressurized by a pollution discharge module 7 and then discharged; make-up water prepared by the two-loop make-up water preparation module 37 is made up into a loop system through a two-loop make-up water pump 38; the inlet of the water replenishing pump 38 is provided with a dosing pipeline 36 for adding chemical agents.
In addition, the two-circuit system further includes: valve I1, flow measuring device I2, valve II 3, pressure measuring device I4, temperature measuring device I5 and valve VIII 42.
The specific operation process of the two-loop system of this embodiment is as follows:
1) preparing the deoxygenated water in advance by adopting a two-loop make-up water preparation module 37;
2) injecting test agents into the two-loop system through a drug adding pipeline 36 of the two-loop water quality adjusting system, and simulating a water chemical environment required by the test of the two-loop system;
4) in the test operation, various parameters (such as pH, conductivity, ion concentration and the like) of the two-loop water chemistry are continuously or periodically monitored by the two-loop online monitoring system 41, if necessary, sampling analysis can be carried out through the discharge port of the pollution discharge module 7, and the two-loop test medium is adjusted according to the measurement result of the water chemistry parameters, wherein the method comprises the following steps: when the measurement result of the chemical ion concentration parameter is lower, the chemical adding operation is carried out, and when the measurement result is higher, the pollution discharge and water supplement operation is carried out; when the measurement result of the dissolved oxygen concentration is higher, accurately calculating the addition amount of the deoxidant according to the measurement result, and adding the deoxidant for adjustment; when the pH measurement result is higher or lower, different types of test medicaments are added for adjustment;
5) in the test process, a real-time pressure value is obtained through a pressure measuring device I4 arranged at an inlet of the secondary side of the steam generator 6, and the regulation of the two-loop pressure stabilizing device 40 is guided, so that the pressure of a two-loop system is the same as that of a prototype; obtaining a real-time temperature value through a temperature measuring device I5 arranged at the inlet of the secondary side of the steam generator 6, and guiding the flow ratio regulation of the gas side and the liquid side of the mixer 39 (namely the flow ratio of two branches at the outlet of the secondary side of the steam generator simulation body) and the regulation of the cooling water flow of the condenser 43 to ensure that the inlet temperature of the secondary side of the steam generator simulation body 6 is the same as the original temperature; and a real-time flow value is obtained through a flow measuring device I2 arranged at an inlet of the secondary side of the steam generator, and the opening of a valve II 3 is guided to be adjusted, so that the flow of the secondary side of the steam generator is the same as that of the original model.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (14)
1. The comprehensive dynamic water corrosion test device is characterized by comprising a loop system and a secondary loop system; the first loop system and the second loop system comprise main loop systems; the system comprises a loop system, a main pump, a pressure stabilizer, a plurality of simulators, a plurality of pressure sensors, a pressure sensor, a pressure controller, a pressure sensor and a pressure controller, wherein the loop system is a closed loop system, the pressure stabilizer is arranged at the inlet of the main pump to realize prototype simulation of loop pressure in a steam pressure stabilizing mode, and the main loop system of the loop system forms a multi-loop system through the serial and/or parallel connection of a plurality of simulators and various devices to realize simulation of different test parameters of various simulators; the two-loop system realizes prototype simulation of the pressure of the two loops through a pressure stabilizing device; the main loop system of the two-loop system realizes the simulation of different test parameters of the secondary side of the steam generator simulation body;
the two-loop system also comprises a two-loop water quality adjusting system, and the two-loop water quality adjusting system comprises a sewage discharge module (7), a two-loop water replenishing pump (38), a two-loop water replenishing preparation module (37) and a two-loop dosing pipeline (36); part of medium led out from the secondary side of the steam generator analog body (6) is cooled and depressurized by a pollution discharge module (7) and then is discharged; make-up water prepared by the two-loop make-up water preparation module (37) is made up into a secondary loop system through a two-loop make-up water pump (38); the inlet of the two-loop water replenishing pump (38) is provided with a two-loop dosing pipeline (36) for adding chemical agents.
2. The integrated dynamic water corrosion test device according to claim 1, wherein the main loop system of the loop system comprises a primary side of a steam generator simulator (6), a simulator A (11), a simulator B (13), a simulator C (19), a main pump (24), a main heater (22), a preheater (16) and a loop voltage stabilizer (27); the test medium is heated by a main heater (22) from the outlet of a main pump (24) and then is divided into two branches, the test medium of the first branch enters a simulation body A (11) after flow regulation, the outlet medium part of the simulation body A (11) is divided to the primary side of a steam generator simulation body (6), and the rest of the medium is mixed with the outlet medium of the simulation body B (13) and the outlet medium of the primary side of the steam generator simulation body (6) after flow regulation and then returns to the inlet of the main pump (24); the test medium of the second branch enters the simulator C (19) after flow regulation, then enters the simulator B (13) after being heated for the second time by the preheater (16), and the outlet medium of the simulator B (13) returns to the inlet of the main pump (24) after being mixed with the split medium of the simulator A (11) and the outlet medium of the primary side of the steam generator simulator (6).
3. The comprehensive flowing water corrosion test device according to claim 2, wherein the primary loop system further comprises a primary loop water quality adjusting system, and the primary loop water quality adjusting system comprises a cooling device (28), a purification module (31), a primary loop water replenishing pump (25), a primary loop water replenishing preparation module (34) and a primary loop medicine adding pipeline (35); part of medium which is shunted from the outlet of the main pump (24) is cooled by a cooling device (28), enters a water quality purification module for purification and then returns to the inlet of the main pump; make-up water prepared by a loop make-up water preparation module is made up into a loop system through a loop make-up water pump (25); a primary loop dosing pipeline (35) is arranged at an inlet (25) of the primary loop water replenishing pump (25) and used for adding chemical agents.
4. The comprehensive flowing water corrosion test device according to claim 3, wherein a flow measuring device and a temperature measuring device are arranged at an outlet of a cooling device (28) in a primary loop water quality regulating system to obtain a real-time flow value and a temperature value of a test medium of the purification module (31) for guiding the opening regulation of a valve at an inlet of the purification module (31); setting pressure measurement equipment in a main loop system of a loop system to obtain a real-time pressure value for guiding the power regulation of a loop voltage stabilizer (27) so that the pressure of the loop system is the same as that of a prototype; arranging temperature measuring equipment at the inlet of each simulation body to obtain a real-time temperature value for guiding the power regulation of the main heater and the preheater so that the test temperature of each simulation body is the same as that of the prototype; flow measuring devices are respectively arranged at the serial loop of the simulator B (13) and the simulator C (19), the inlet of the simulator A (11) and the inlet of the primary side of the steam generator simulator (6) to obtain a real-time flow value for guiding the adjustment of the opening of each valve, so that the test flow rate of each simulator is the same as that of a prototype.
5. The comprehensive flowing water corrosion test device according to any one of claims 1-4, wherein the main loop system of the two-loop system comprises a steam generator simulator (6) secondary side, a condensate pump (8), a condenser (43), a mixer (39) and a two-loop pressure stabilizer (40); the test medium is divided into two branches after coming out of a secondary side outlet of the steam generator simulation body (6), the test medium of the first branch enters a mixer after being condensed by a condenser (43) and flow regulation, and the test medium of the second branch directly enters the mixer (39) after flow regulation; the test media of the two branches are mixed in a mixer (39), then regulated by a two-loop pressure stabilizing device (40), and then driven by a condensate pump (8) to enter the secondary side of a steam generator simulator (6).
6. The comprehensive flowing water corrosion test device according to claim 5, wherein a pressure measuring device is arranged at the secondary side inlet of the steam generator simulation body (6) to obtain a real-time pressure value for guiding the power regulation of the two-loop voltage stabilizer (40) so that the pressure of the two-loop system is the same as that of the prototype; temperature measuring equipment is respectively arranged at an outlet and an inlet of the secondary side of the steam generator simulation body (6) to obtain real-time temperature values for guiding the flow ratio regulation of the gas side and the liquid side of the mixer (39) and the cooling water flow regulation of the condenser (43), so that the temperature of the secondary side inlet of the steam generator simulation body (6) is the same as that of the prototype; and a flow measuring device is arranged at the inlet of the secondary side of the steam generator simulation body (6) to obtain a real-time flow value for guiding the adjustment of the valve opening, so that the flow of the secondary side of the steam generator simulation body (6) is the same as that of the prototype.
7. The integrated kinetic water corrosion test device according to any one of claims 1 to 4, wherein the one-loop system and the two-loop system further comprise an online monitoring system, and the online monitoring system is used for monitoring water chemical parameters of the loop system in real time and adjusting a loop system test medium according to the monitoring result of the water chemical parameters.
8. The comprehensive flowing water corrosion test device according to claim 7, wherein the one-loop system and the two-loop system are both provided with an artificial sampling pipeline, the front end of the water quality purification module (31) of the one-loop system is provided with an artificial sampling pipeline (32), and the artificial sampling pipeline of the two-loop system is a discharge port of the sewage discharge module.
9. The integrated kinetic water corrosion test device according to claim 7, wherein the online monitoring system comprises a dissolved oxygen measuring instrument, a dissolved hydrogen measuring instrument, a conductivity measuring instrument, a pH measuring instrument and an ion concentration analyzing instrument.
10. A test method based on the integrated flowing water corrosion test device of any one of claims 1 to 9, characterized in that the test method comprises a test of a primary loop system and a simulation and test of a water chemistry environment of a secondary loop system.
11. The testing method of claim 10, wherein the simulation and testing of the water chemistry environment of the primary loop system comprises the steps of:
step S11, preparing deoxygenated water in advance by adopting a make-up water preparation module;
step S12, measuring the primary loop dissolved oxygen through an online monitoring system of the primary loop system, and calculating the addition of the deoxidant according to the measurement result; injecting a deoxidant into the primary loop through a dosing pipeline of the primary loop water quality adjusting system to carry out constant-temperature deoxidization, and monitoring the oxygen concentration through an online monitoring system of the primary loop system until the dissolved oxygen concentration is reduced to a required range;
step S13, after the deoxidization is qualified, a water quality purification module in a primary loop water quality regulation system is started to remove residual deoxidization agent;
step S14, after the residual deoxidant is removed, injecting a test medium into the primary loop system through a water replenishing pump and a dosing pipeline in the primary loop water quality adjusting system to simulate a test water chemical environment required by the primary loop system;
step S15, in the test operation, continuously or periodically monitoring the primary loop water chemical parameters through an online monitoring system of the primary loop system, sampling and analyzing through a manual sampling port if necessary, and adjusting the primary loop test medium according to the water chemical parameter measurement result;
step S16, in the test process, a flow measuring device and a temperature measuring device arranged at an outlet of a cooling device in a loop water quality regulating system are used for obtaining a real-time flow value and a temperature value of a test medium flowing through a water quality purification module, and guiding the opening regulation of a valve at an inlet of the water quality purification module to enable the purification flow to meet the requirement, and meanwhile, the purification column is prevented from losing effectiveness due to overhigh temperature at the inlet of the water quality purification module; real-time pressure values are obtained through a loop main loop pressure measuring device, and power regulation of a loop voltage stabilizer is guided, so that the loop system pressure is the same as the original pressure; obtaining a real-time temperature value through temperature measuring equipment arranged at an inlet of the test simulation body, and guiding power regulation of the main heater and the preheater to enable the test temperature of the test simulation body to be the same as that of the prototype; the real-time flow value is obtained through a serial loop of the simulator body B and the simulator body C, flow measuring equipment arranged at an inlet of the simulator body A and an inlet of a primary side of the steam generator simulator body, and the opening adjustment of the valve is guided, so that the test flow rate of the test simulator body is the same as that of a prototype.
12. The testing method according to claim 11, wherein the step S15 of adjusting the primary loop testing medium according to the water chemistry parameter measurement result is specifically: when the measurement result of the chemical ion concentration parameter is lower, the dosing operation is carried out; and when the measurement result is higher, performing purification operation.
13. The testing method of claim 10, wherein the simulation and testing of the water chemistry environment of the two-circuit system comprises the steps of:
step S21, preparing deoxygenated water in advance by adopting a two-loop make-up water preparation module;
step S22, injecting test agents into the two-loop system through a dosing pipeline of the two-loop water quality adjusting system, and simulating a water chemistry environment required by the test of the two-loop system;
step S23, in the test operation, the on-line monitoring system of the two-loop system continuously or periodically monitors the water chemistry parameters of the two-loop system, if necessary, the discharge port of the pollution discharge module performs sampling analysis, and the two-loop test medium is adjusted according to the measurement result of the water chemistry parameters;
step S24, in the test process, obtaining a real-time pressure value through a pressure measuring device arranged at the secondary side inlet of the steam generator simulator, and knowing the adjustment of the two-loop pressure stabilizing device to ensure that the pressure of the two-loop system is the same as that of the prototype; obtaining a real-time temperature value through temperature measuring equipment arranged at an inlet of the secondary side of the steam generator simulator, and guiding the flow ratio regulation of the gas side and the liquid side of the mixer and the regulation of the cooling water flow of the condenser to ensure that the temperature of the inlet of the secondary side of the steam generator simulator is the same as that of the prototype; and (3) obtaining a real-time flow value through flow measuring equipment arranged at an inlet of the secondary side of the steam generator, and guiding the adjustment of the opening of a valve to ensure that the flow of the secondary side of the steam generator is the same as that of the prototype.
14. The test method according to claim 13, wherein the step S24 of adjusting the two-circuit test medium according to the water chemistry parameter measurement result is specifically: when the measurement result of the chemical ion concentration parameter is lower, the chemical adding operation is carried out, and when the measurement result is higher, the pollution discharge and water supplement operation is carried out; when the measurement result of the dissolved oxygen concentration is higher, accurately calculating the addition amount of the deoxidant according to the measurement result, and adding the deoxidant for adjustment; when the pH measurement result is higher or lower, the pH value is adjusted by adding different test agents.
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