CN103543096B - A kind of dynamic high temperature high-pressure oxidation experimental provision - Google Patents
A kind of dynamic high temperature high-pressure oxidation experimental provision Download PDFInfo
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- CN103543096B CN103543096B CN201310529916.1A CN201310529916A CN103543096B CN 103543096 B CN103543096 B CN 103543096B CN 201310529916 A CN201310529916 A CN 201310529916A CN 103543096 B CN103543096 B CN 103543096B
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Abstract
The present invention relates to a kind of material oxidation experimental provision, be specifically related to a kind of dynamic high temperature high-pressure steam oxidation assay device.Including: the ultrapure water production system that is sequentially connected with by pipeline, high-pressure metering pump and for producing the preheating furnace of steam, described preheating furnace is connected with high-temperature high-voltage reaction device by pipeline；Described high-temperature high-voltage reaction device includes the kettle heating furnace for again heating and the autoclave being arranged in kettle heating furnace inner chamber for sample is tested；Go out and the pipeline of high-temperature high-voltage reaction device is provided with counterbalance valve and refrigerating chamber；Described counterbalance valve is arranged in refrigerating chamber；Described refrigerating chamber is connected to condenser；Described autoclave is arranged by the temperature-control heat couple controlling temperature.Can be in laboratory conditions, it is achieved the high temperature and high pressure steam of material is aoxidized dynamic test, and 800 DEG C, the environment of 40MPa can be reached.
Description
Technical field
The present invention relates to a kind of material oxidation assay device, be specifically related to a kind of dynamic high temperature high-pressure steam oxidation assay device.
Technical background
Steam oxidation is a kind of special Corrosion Types, the parameter (temperature and pressure) of extent of corrosion and steam medium has direct relation, especially the parts such as Utility Boiler Superheater, reheater, jet chimney tend to occur inwall severe oxidation in running, and the phenomenon such as come off.The damage that oxide skin is peeled off has two kinds of forms.First, in unit starting and furnace shutting down process, the peeling rate of oxide is the highest.In pendant superheater and reheater, cast often blocks the bigger crooked position of elbow, particularly curvature of bottom completely.Under normal circumstances, this blocking, when unit puts into operation, it is possible to will not be cleaned out, so that when unit load up, producing short-time overheating and damage.Secondly, oxide peels off the modal problem caused is cause the abrasion of steam turbine solid particle to cause badly damaged.The position of corrosion is generally occurred to include Turbine Steam door rod, first order jet nozzle unit and middle-pressure steam turbine dividing plate.Therefore, for research and solution steam oxidation problem, researcher both domestic and external has carried out substantial amounts of laboratory test and analytical work.But it is possible to the laboratory instrumentation effectively simulating boiler operatiopn condition is also very limited, and consider power plants generating electricity efficiency, be difficult to again carry out actual measurement experiment in power plant.
So far, lot of domestic and international scientific research institutions all develop steam oxidation test device.Such as, " metal material high temperature water vapor oxidation experiment device " (CN10162661B) that Electrical Power Research Institute of Guangdong Power Grid Corporation proposes, produce steam by steam generator, rely on the pressure that the continuous vaporized expanding of water produces to promote steam flowing.These work bring many help for experimental study, but do not possess condition of high voltage, and test technology cannot simulate actual condition.Patent " high-temperature steam oxidation test device " (CN101118211B), is transmitted deionized water by dosing pump through deoxygenation, and preheated stove is heated as high-temperature steam, owing to design of Sealing Structure causes system pressure not high (25MPa), also cannot simulate actual condition.The operational factor of patent " a kind of supercritical steam oxidization test device " is also less than 620 DEG C.Patent " a kind of method and apparatus carrying out long-time oxidized corrosion experiment in supercritical water " devises and a kind of rustless steel, nickel-base alloy can carry out room temperature-700 DEG C, normal pressure-35MPa, the supercritical water oxidation experiment of thousands of hours, but this invention can only realize static immersing corrosion experiment, it is impossible to the demand of the experiment of simulation High Temperature High Pressure Dynamic Corrosion.The testing equipment that can realize super (super-) critical steam condition is set up in external only Individual testwas room, such as: the steam oxidation device of U.S.'s NETL laboratory, the pyrogenic steam oxidation platform etc. of NipponSteel company of Japan, but its experiment parameter is far below the operating mode (750 DEG C, 35MPa) required by power station technology of future generation.
Summary of the invention
It is an object of the invention to, overcome the defect of above-mentioned prior art, it is provided that one can in laboratory conditions, and simple and effective realization tests material dynamic high temperature high-pressure steam oxidation assay device of oxidation behavior when dynamic environment, high temperature and high pressure steam.
For achieving the above object, the technical scheme is that the high-pressure metering pump including ultrapure water production system and being connected with ultrapure water production system, high-pressure metering pump is provided with the pipeline sequentially passing through preheating furnace and kettle heating furnace, the outlet of this pipeline is connected with the autoclave for placing UUT being arranged in kettle heating furnace, and on autoclave, it is provided with the temperature-control heat couple for controlling kettle furnace temp, the outlet of autoclave is connected with the counterbalance valve being arranged in refrigerating chamber by the road, and on refrigerating chamber, it is also associated with condenser.
Described ultrapure water production system includes the upper water box with discharging valve that the ultrapure water machine being provided with ion exchange resin is connected with ultrapure water machine；Described upper water box is connected with high-pressure metering pump by pipeline.
The export pipeline of described counterbalance valve is provided with the lower header with lower header valve；Described lower header is connected with ultrapure water machine by water pump.
Pipeline between described high-pressure metering pump and preheating furnace is provided with the antivibrator for compensator or trimmer pressure fluctuation.
Described preheating furnace, kettle heating furnace are respectively arranged with preheating furnace temperature-control heat couple, kettle temperature thermocouple.
Pipeline in described preheating furnace adopts spiral tube structure.
The outlet of described pipeline enters bottom autoclave, for pipe outlet fluid can be made along autoclave barrel wall rotational flow bottom inlet duct, and make the warp architecture of autoclave inner barrel steam automatic rotation, and bottom autoclave, it is further opened with quick opening valve.
Pipeline between described autoclave and counterbalance valve is provided with pressure control assembly；
Pressure transducer that described pressure control assembly includes being arranged in upstream and the Pressure gauge being arranged on downstream pipe auxiliary work and air relief valve.
Described kettle heating furnace include body of heater and be arranged on inboard wall of furnace body round autoclave several heating rods, and preheating furnace and kettle heating furnace all adopt the heat insulation layer of aluminium silicate packing material.
The thermal detector for measuring temperature it is provided with in described refrigerating chamber.
Ultra-pure water is converted into steam by preheating furnace by the present invention, then by kettle heating furnace steam heated again and realize progressive solution, thus the temperature needed for reaching oxidation experiment, coordinated by high-pressure metering pump and counterbalance valve and make to reach the pressure needed for oxidation experiment, and 800 DEG C, 40MPa can be reached.The real-time temperature controlled in reactor is carried out by arranging temperature-control heat couple in autoclave.By arranging refrigerating chamber and condenser after autoclave, improve the condensing rate of steam, increase stability and the safety of system.
Further, the present invention is by being entered autoclave by pipeline in kettle heating furnace by bottom of furnace body, and by pipeline bending at an angle, makes steam automatic rotation in autoclave, thus reaching the effect of dynamic test.
Further, the present invention is by forming media flow loop, it is achieved recycling of water resource, it is possible to effectively save cost.
Accompanying drawing explanation
Fig. 1 is assembly of the invention structural representation.
Wherein: 1, ultrapure water machine；2, upper water box；3, upper water box discharging valve；4, high-pressure metering pump；5, antivibrator；6, preheating furnace；7, temperature-control heat couple；8, kettle heating furnace；9, autoclave；10, heating rod；11, temperature-control heat couple；12, valve；13, temperature thermocouple；14, pressure transducer；15, Pressure gauge；16, air relief valve；17, refrigerating chamber；18, counterbalance valve；19, condenser；20, thermal detector；21, lower header；22, water pump；23, lower header discharging valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1, the ultrapure water production system that the present invention includes ultrapure water machine 1 and the upper water box 2 with discharging valve 3 that is connected with ultrapure water machine 1 forms, ultrapure water machine 1 adopts ion exchange resin depurator；Make the ultra-pure water electrical conductivity prepared > 0.05 μ s/cm (18M Ω)；nullUpper water box 2 by pipeline successively with high-pressure metering pump 4、Antivibrator 5 is connected，The pipeline going out antivibrator 5 sequentially passes through preheating furnace 6 and kettle heating furnace 8，And be connected with the autoclave 9 for placing UUT being arranged in kettle heating furnace 8，And this pipeline adopts diameter 6mm、Wall thickness 1mm Hastelloy pipe enters bottom autoclave 9，For pipe outlet fluid can be made along autoclave 9 barrel wall rotational flow bottom inlet duct，And make the warp architecture of autoclave 9 inner barrel steam automatic rotation，And bottom autoclave 9, it is further opened with quick opening valve 12，Autoclave 9 is provided with the temperature-control heat couple 11 for controlling kettle furnace temp，The outlet of autoclave 9 is connected with the counterbalance valve 18 being arranged in refrigerating chamber 17 by the road，And on refrigerating chamber 17, it is also associated with condenser 19，The thermal detector 20 for measuring temperature it is provided with in refrigerating chamber 17，The export pipeline of counterbalance valve 18 is provided with the lower header 21 with lower header valve 23；Described lower header is connected with ultrapure water machine 1 by water pump 22.Preheating furnace 6, kettle heating furnace 8 are respectively arranged with preheating furnace temperature-control heat couple 7, kettle temperature thermocouple 13, and preheating furnace 6 and kettle heating furnace 8 all adopt the heat insulation layer of aluminium silicate packing material.And the pipeline between autoclave 9 and counterbalance valve 18 is provided with pressure control assembly；Pressure transducer 14 that described pressure control assembly includes being arranged in upstream and the Pressure gauge 15 being arranged on downstream pipe auxiliary work and air relief valve 16.
Pipeline in the preheating furnace 6 of the present invention adopts spiral tube structure, pipe external diameterWall thickness 1.5mm.Autoclave 9 adopts Ni-based solid forging or bar alloy, welding, wall thickness 20mm.Kettle heating furnace 8 include body of heater and be arranged on inboard wall of furnace body round autoclave 9 several heating rods 10.
In the media flow loop of the present invention, flow rate of liquid is that steam flow rate is less than 50ml/min less than 8ml/min.Pipe valve adopts Hastelloy materials processing, mainly has valve, threeway, four-way, pressure cap, pressure ring, straight-through, adapter etc..
Work process: the preparation before plant running includes system evacuation, sample installation, system water filling (ultra-pure water) and starts water process, arranges high-pressure metering pump 4 and the several step of counterbalance valve 18.System evacuation refers to after system sealing, to start high-pressure pump and be completely exhausted out by the water of test last time residual.Sample is installed and is referred to be fixed on sample stand by sheet specimens and be positioned in high-pressure reactor 9.System water filling refers to when not heating up, and with relatively low pressure, ultra-pure water fills whole cavity and pipeline.Start water process refer to open ultrapure water production system, including ultrapure water machine 1 and for water circulation pump 22.High-pressure metering pump 4 arranges and includes pressure and flow set.
Normal condition: with high-pressure metering pump 4 for starting point, high pressure ultra-pure water is flow forward under the pressure effect of high-pressure metering pump 4, enters steam preheating stove and is heated, it is achieved by the transformation of water to gas after antivibrator 5 compensator or trimmer pressure fluctuates, and reach to specify steam preheating temperature, about 450-600 DEG C；Then steam enters kettle heating furnace by pipeline, again heated by kettle heating furnace 8, reach to test temperature required 700-800 DEG C, and entered autoclave 9 by bottom of furnace body, bottom suction line appropriately curved, make pipeline outlet fluid along barrel wall rotational flow, at autoclave 9 steam inside automatic rotation.The steam going out autoclave 9 first passes through pressure control assembly, and when there is super high pressure accident, pressure transducer 14 and air relief valve 16 would automatically turn on and carry out pressure release, and pressure registration is read by Pressure gauge 15.Then steam is cooled down by cooling assembly, is condensed by steam, liquefies.Condensed ultra-pure water enters lower header 21 by pipeline, is then imported ultrapure water machine 1 by water pump 22, thus realizing recycling of water.
When experiment terminates, being first shut off steam preheating assembly, high-temperature high-voltage reaction device, be then shut off high-pressure metering pump 4, autoclave 9 is slowly cooled to room temperature with stove, opens quick opening valve and takes out sample.Normal experiment generally need not experimenter be intervened, and system will be run automatically.Flow according to experimental design, needs timing to carry out water supply to lower header.
Claims (4)
1. a dynamic high temperature high-pressure steam oxidation experimental provision, it is characterized in that, including ultrapure water production system and the high-pressure metering pump (4) that is connected with ultrapure water production system, high-pressure metering pump (4) is provided with the pipeline sequentially passing through preheating furnace (6) and kettle heating furnace (8), the outlet of this pipeline is connected with the autoclave (9) for placing UUT being arranged in kettle heating furnace (8), and on autoclave (9), it is provided with the temperature-control heat couple (11) for controlling kettle furnace temp, the outlet of autoclave (9) is connected with the counterbalance valve (18) being arranged in refrigerating chamber (17) by the road, and on refrigerating chamber (17), it is also associated with condenser (19)；
Described preheating furnace (6), kettle heating furnace (8) are respectively arranged with preheating furnace temperature-control heat couple (7), kettle temperature thermocouple (13)；
Pipeline in described preheating furnace (6) adopts spiral tube structure；
The outlet of described pipeline enters from autoclave (9) bottom, for pipe outlet fluid can be made along autoclave (9) barrel wall rotational flow bottom inlet duct, and make the warp architecture of autoclave (9) inner barrel steam automatic rotation, and it is further opened with quick opening valve (12) in autoclave (9) bottom；
Described ultrapure water production system includes being provided with the upper water box with discharging valve (3) (2) that the ultrapure water machine (1) of ion exchange resin is connected with ultrapure water machine (1)；Described upper water box (2) is connected with high-pressure metering pump (4) by pipeline；
Described kettle heating furnace (8) includes body of heater and is arranged on inboard wall of furnace body round several heating rods (10) of autoclave (9), and preheating furnace (6) and kettle heating furnace (8) all adopt the heat insulation layer of aluminium silicate packing material；
Pipeline between described autoclave (9) and counterbalance valve (18) is provided with pressure control assembly；
Pressure transducer (14) that described pressure control assembly includes being arranged in upstream and the Pressure gauge (15) being arranged on downstream pipe auxiliary work and air relief valve (16).
2. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, it is characterised in that: the export pipeline of described counterbalance valve (18) is provided with the lower header (21) with lower header valve (23)；Described lower header is connected with ultrapure water machine (1) by water pump (22).
3. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, it is characterised in that: the pipeline between described high-pressure metering pump (4) and preheating furnace (6) is provided with the antivibrator (5) for compensator or trimmer pressure fluctuation.
4. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, it is characterised in that: it is provided with the thermal detector (20) for measuring temperature in described refrigerating chamber (17).
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| CN104568722A (en) * | 2015-01-23 | 2015-04-29 | 中国核动力研究设计院 | Corrosion testing device under supercritical state |
| CN104729979A (en) * | 2015-03-27 | 2015-06-24 | 华电电力科学研究院 | High temperature water vapor oxidation experiment device capable of accurately controlling oxygen content |
| CN105842081A (en) * | 2016-05-06 | 2016-08-10 | 华能国际电力股份有限公司 | High-temperature lasting test device and method for environment corrosion |
| CN106708111A (en) * | 2016-12-29 | 2017-05-24 | 华能国际电力股份有限公司 | Dynamic high temperature and high pressure steam oxidation test device controlling oxygen content and use method thereof |
| CN106896054B (en) * | 2017-04-20 | 2020-10-30 | 华能国际电力股份有限公司 | Supercritical carbon dioxide corrosion experimental device |
| CN107525762B (en) * | 2017-10-17 | 2023-06-13 | 华能国际电力股份有限公司 | Test device and method for testing adhesiveness of thermally grown oxide film on metal surface |
| CN108548859B (en) * | 2018-06-11 | 2023-11-03 | 遵义师范学院 | Direct determination device and determination method for chemical oxygen demand of solid pollutants |
| CN110132831A (en) * | 2019-05-30 | 2019-08-16 | 华能山东石岛湾核电有限公司 | A kind of high temperature gas cooled reactor secondary circuit Dynamic Water chemical corrosion test research device and application method |
| CN115376395B (en) * | 2022-08-05 | 2023-11-10 | 国家电投集团科学技术研究院有限公司 | Full-process simulation test system for water loss accident |
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