CN103543096A - Dynamic high-temperature and high-pressure oxidation experiment device - Google Patents
Dynamic high-temperature and high-pressure oxidation experiment device Download PDFInfo
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Abstract
The invention relates to a material oxidation experiment device and particularly relates to a dynamic high-temperature and high-pressure oxidation experiment device. The dynamic high-temperature and high-pressure oxidation experiment device comprises an ultrapure water preparation system, a high-pressure metering pump and a pre-heating furnace for generating steam which are connected by a pipeline in sequence, wherein the pre-heating furnace is connected with a high-temperature and high-pressure reactor by a pipeline; the high-temperature and high-pressure reactor further comprises a kettle body heating furnace for reheating and a high-pressure reaction kettle which is arranged in an inner cavity of the kettle body heating furnace and is used for carrying out an experiment on a test sample; a pipeline stretching out of the high-temperature and high-pressure reactor is provided with a backpressure valve and a refrigeration chamber; the backpressure valve is arranged in the refrigeration chamber; the refrigeration chamber is connected with a condenser; the high-pressure reaction kettle is provided with a temperature controlling thermoelectric couple for controlling the temperature. According to the dynamic high-temperature and high-pressure oxidation experiment device, a high-temperature and high-pressure steam oxidization dynamic experiment of a material can be realized under the condition of a laboratory and an environment of 800 DEG C and 40MPa can be realized.
Description
Technical field
The present invention relates to a kind of material oxidation test unit, be specifically related to a kind of dynamic high temperature high-pressure steam oxidation test unit.
Technical background
Steam oxidation is a kind of special Corrosion Types, the parameter of extent of corrosion and steam medium (temperature and pressure) has direct relation, especially often there is inwall severe oxidation in the parts such as Utility Boiler Superheater, reheater, jet chimney in operational process, and the phenomenon such as come off.The damage that oxide skin is peeled off has two kinds of forms.The first, in unit starting and furnace shutting down process, the rate of peeling off of oxide is the highest.In pendant superheater and reheater, cast is often blocked the larger crooked position of elbow, particularly curvature of bottom completely.Generally, this obstruction, when unit puts into operation, may not can cleanedly falls, so that when unit load up, and it is overheated and damage in short-term to produce.Next, it is cause the wearing and tearing of steam turbine solid particle and cause badly damaged that oxide is peeled off the modal problem causing.The position that corrosion occurs conventionally comprises steam turbine porthole bar, first order jet nozzle unit and middle-pressure steam turbine dividing plate.Therefore, be research and solution steam oxidation problem, researcher both domestic and external has been carried out a large amount of laboratory examinations and analytical work.But the laboratory instrumentation that can effectively simulate boiler operatiopn condition is also very limited, and considers power plant's generating efficiency problem, be difficult to again carry out actual measurement experiment in power plant.
So far, lot of domestic and international scientific research institutions have all developed steam oxidation proving installation.For example, the < < metal material high temperature water vapor oxidation experiment device > > (CN10162661B) that Electrical Power Research Institute of Guangdong Power Grid Corporation proposes, by steam generator, produce steam, the pressure that relies on the continuous vaporized expanding of water to produce promotes vapor flow.These work bring many help for experimental study, but do not possess condition of high voltage, and test technology cannot be simulated actual condition.Patent < < high-temperature steam oxidation test device > > (CN101118211B), deionized water is transmitted by volume pump through deoxygenation, through preheating furnace, be heated as high-temperature steam, because design of Sealing Structure causes system pressure not high (25MPa), also cannot simulate actual condition.The operational factor of a patent < < supercritical steam oxidization test device > > is also no more than 620 ℃.The method and apparatus > > that mono-kind of patent < < carries out long-time oxidized corrosion experiment in supercritical water has designed and a kind ofly can carry out room temperature-700 ℃, normal pressure-35MPa, the supercritical water oxidation experiment of thousands of hours to stainless steel, nickel-base alloy, but this invention can only realize static immersing corrosion experiment, cannot simulate the demand of the experiment of High Temperature High Pressure Dynamic Corrosion.Only have Individual testwas chamber to set up the testing equipment that can realize super (super-) critical steam condition abroad, for example: the steam oxidation device in U.S. NETL laboratory, the high-temperature steam oxidation platform of Japan Nippon Steel company etc., but its experiment parameter far below the desired operating mode of power station technology of future generation (750 ℃, 35MPa).
Summary of the invention
The object of the invention is to, overcome the defect of above-mentioned prior art, provide a kind of can be under laboratory condition, the simple and effective dynamic high temperature high-pressure steam oxidation test unit of realizing test material oxidation behavior under dynamic environment, high temperature and high pressure steam condition.
For achieving the above object, technical scheme of the present invention is: comprise ultrapure water production system and the high-pressure metering pump being connected with ultrapure water production system, the pipeline that passes successively preheating furnace and kettle heating furnace is installed on high-pressure metering pump, the outlet of this pipeline be arranged on kettle heating furnace in for placing the autoclave of UUT, be connected, and on autoclave, be provided with for controlling the temperature-control heat couple of kettle furnace temp, the outlet of autoclave by the road be arranged on refrigerating chamber in counterbalance valve be connected, and on refrigerating chamber, be also connected with condenser.
Described ultrapure water production system comprises and is provided with the upper water box with water drain valve that the ultrapure water machine of ion exchange resin is connected with ultrapure water machine; Described upper water box is connected with high-pressure metering pump by pipeline.
On the export pipeline of described counterbalance valve, be provided with the lower header with lower header valve; Described lower header is connected with ultrapure water machine by water pump.
On described high-pressure metering pump and the pipeline between preheating furnace, be provided with the damper for compensator or trimmer pressure fluctuation.
On described preheating furnace, kettle heating furnace, be 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 from autoclave bottom, inlet duct bottom is for can make pipe outlet fluid along autoclave barrel wall rotational flow, and make the warp architecture of autoclave inner barrel steam automatic rotation, and also offer quick opening valve in autoclave bottom.
On described autoclave and the pipeline between counterbalance valve, be provided with pressure control assembly;
Described pressure control assembly comprises tensimeter and the reduction valve that is arranged on the pressure transducer in upstream and is arranged on auxiliary work on the pipeline of downstream.
Described kettle heating furnace comprise 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 thermal insulation separation thermosphere of alumina silicate packing material.
In described refrigerating chamber, be provided with for measuring the thermal detector of temperature.
The present invention is converted into steam by preheating furnace by ultrapure water, then by kettle heating furnace, steam is again heated and realizes classification and heat, thereby reach the required temperature of oxidation experiment, by high-pressure metering pump and counterbalance valve, coordinate and make to reach the required pressure of oxidation experiment, and can reach 800 ℃, 40MPa.By being set in autoclave, temperature-control heat couple carrys out the temperature in real-time control reactor.By refrigerating chamber and condenser are set after autoclave, improve the condensing rate of steam, increase stability and the security of system.
Further, the present invention is by kettle heating furnace inner tube route bottom of furnace body is entered to autoclave, and by pipeline bending at an angle, makes steam automatic rotation in autoclave, thereby reaches the effect of dynamic test.
Further, the present invention, by forming media flow loop, realizes recycling of water resource, can be effectively cost-saving.
Accompanying drawing explanation
Fig. 1 is apparatus structure schematic diagram of the present invention.
Wherein: 1, ultrapure water machine; 2, upper water box; 3, upper water box water drain valve; 4, high-pressure metering pump; 5, damper; 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, tensimeter; 16, reduction valve; 17, refrigerating chamber; 18, counterbalance valve; 19, condenser; 20, thermal detector; 21, lower header; 22, water pump; 23, lower header water drain valve.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1, the present invention includes ultrapure water machine 1 and ultrapure water production system that the upper water box 2 with water drain valve 3 that is connected with ultrapure water machine 1 forms, ultrapure water machine 1 adopts ion exchange resin clarifier, make the ultrapure water conductivity >0.05 μ s/cm (18M Ω) preparing, upper water box 2 by pipeline successively with high-pressure metering pump 4, damper 5 is connected, go out the pipeline of damper 5 successively through preheating furnace 6 and kettle heating furnace 8, and be arranged on kettle heating furnace 8 in for placing the autoclave 9 of UUT, be connected, and this pipeline adopts diameter 6mm, wall thickness 1mm Hastelloy pipe enters from autoclave 9 bottoms, inlet duct bottom is for can make pipe outlet fluid along autoclave 9 barrel wall rotational flows, and make the warp architecture of autoclave 9 inner barrel steam automatic rotations, and also offer quick opening valve 12 in autoclave 9 bottoms, on autoclave 9, be provided with for controlling the temperature-control heat couple 11 of kettle furnace temp, the outlet of autoclave 9 by the road be arranged on refrigerating chamber 17 in counterbalance valve 18 be connected, and on refrigerating chamber 17, be also connected with condenser 19, in refrigerating chamber 17, be provided with for measuring the thermal detector 20 of temperature, on the export pipeline of counterbalance valve 18, be 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.On preheating furnace 6, kettle heating furnace 8, be 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 thermal insulation separation thermosphere of alumina silicate packing material.And be provided with pressure control assembly on the pipeline between autoclave 9 and counterbalance valve 18; Described pressure control assembly comprises the pressure transducer 14 being arranged in upstream and the tensimeter 15 that is arranged on auxiliary work on the pipeline of downstream and reduction valve 16.
Pipeline in preheating furnace 6 of the present invention adopts spiral tube structure, pipe external diameter
wall thickness 1.5mm.Autoclave 9 adopts Ni-based solid forging or bar alloy, welding, wall thickness 20mm.Kettle heating furnace 8 comprise body of heater and be arranged on inboard wall of furnace body round autoclave 9 several heating rods 10.
In media flow of the present invention loop, flow rate of liquid is for being less than 8ml/min, and steam flow rate is less than 50ml/min.Pipe valve adopts Hastelloy materials processing, mainly contains valve, threeway, four-way, pressure cap, pressure ring, straight-through, X-over etc.
The course of work: the preliminary work before device operation comprises system evacuation, sample installation, system water filling (ultrapure water) and startup water treatment, high-pressure metering pump 4 and the several steps of counterbalance valve 18 are set.System evacuation refers to after system sealing, starts high-pressure pump and discharges completely testing residual water last time.Sample is installed and is referred to sheet specimens be fixed on sample stand and be positioned in high-pressure reactor 9.System water filling refers under the condition not heating up, and with lower pressure, ultrapure water is filled with to whole cavity and pipeline.Start water treatment and refer to open ultrapure water production system, comprise ultrapure water machine 1 and for the pump 22 of water circulation.High-pressure metering pump 4 arranges and comprises pressure and flow set.
Normal condition: take high-pressure metering pump 4 as starting point, high pressure ultrapure water flows forward under the pressure-acting of high-pressure metering pump 4, enters steam preheating stove and heat after damper 5 compensator or trimmer pressure fluctuations, realizes the transformation to gas by water, and reach and specify steam preheating temperature, about 450-600 ℃; Then steam enters kettle heating furnace by pipeline, by kettle heating furnace 8, again heated, reach the temperature required 700-800 ℃ of experiment, and enter autoclave 9 by bottom of furnace body, source line bottom is suitably crooked, make pipeline outlet fluid along barrel wall rotational flow, at autoclave 9 steam inside automatic rotations.Go out the steam of autoclave 9 first by pressure control assembly, when there is super high pressure accident, pressure transducer 14 and reduction valve 16 will automatically be opened and carry out pressure release, and pressure registration is read by tensimeter 15.Then steam by cooling assembly, undertaken cooling, by steam-condensation, liquefaction.Condensed ultrapure water enters lower header 21 by pipeline, then by water pump 22, imports ultrapure water machine 1, thereby realizes recycling of water.
When experiment finishes, first steam off preheating assembly, high-temperature high-voltage reaction device, then close high-pressure metering pump 4, and autoclave 9 slowly cools to room temperature with stove, opens quick opening valve and take out sample.Normal experiment does not generally need experimenter to intervene, and system will be moved automatically.According to the flow of experimental design, need regularly to lower header, to carry out water supply.
Claims (10)
1. a dynamic high temperature high-pressure steam oxidation experimental provision, it is characterized in that, the high-pressure metering pump that comprises ultrapure water production system and be connected with ultrapure water production system (4), the pipeline that passes successively preheating furnace (6) and kettle heating furnace (8) is installed on high-pressure metering pump (4), the outlet of this pipeline be arranged on being connected for placing the autoclave (9) of UUT in kettle heating furnace (8), and on autoclave (9), be 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), be also connected with condenser (19).
2. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: described ultrapure water production system comprises and is provided with the upper water box with water drain 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.
3. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 2, is characterized in that: on the export pipeline of described counterbalance valve (18), be 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).
4. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: on the pipeline between described high-pressure metering pump (4) and preheating furnace (6), be provided with the damper (5) for compensator or trimmer pressure fluctuation.
5. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: on described preheating furnace (6), kettle heating furnace (8), be respectively arranged with preheating furnace temperature-control heat couple (7), kettle temperature thermocouple (13).
6. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: the pipeline in described preheating furnace (6) adopts spiral tube structure.
7. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, it is characterized in that: the outlet of described pipeline enters from autoclave (9) bottom, inlet duct bottom is for can make pipe outlet fluid along autoclave (9) barrel wall rotational flow, and make the warp architecture of autoclave (9) inner barrel steam automatic rotation, and also offer quick opening valve (12) in autoclave (9) bottom.
8. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: on the pipeline between described autoclave (9) and counterbalance valve (18), be provided with pressure control assembly;
Described pressure control assembly comprises the pressure transducer (14) being arranged in upstream and the tensimeter (15) that is arranged on auxiliary work on the pipeline of downstream and reduction valve (16).
9. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, it is characterized in that: described kettle heating furnace (8) comprise body of heater and be arranged on inboard wall of furnace body round autoclave (9) several heating rods (10), and preheating furnace (6) and kettle heating furnace (8) all adopt the thermal insulation separation thermosphere of alumina silicate packing material.
10. dynamic high temperature high-pressure steam oxidation experimental provision according to claim 1, is characterized in that: in described refrigerating chamber (17), be provided with the thermal detector (20) for measuring temperature.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 endurance test device and method for environmental corrosion |
| CN106708111A (en) * | 2016-12-29 | 2017-05-24 | 华能国际电力股份有限公司 | Dynamic high-temperature high-pressure steam oxidation test device for controlling oxygen content and use method |
| CN106896054A (en) * | 2017-04-20 | 2017-06-27 | 华能国际电力股份有限公司 | Supercritical carbon dioxide corrosion experimental device |
| CN107525762A (en) * | 2017-10-17 | 2017-12-29 | 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 |
| CN108548859A (en) * | 2018-06-11 | 2018-09-18 | 遵义师范学院 | A kind of direct measurement device of solid pollutant COD and its assay method |
| 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 |
| CN115376395A (en) * | 2022-08-05 | 2022-11-22 | 国家电投集团科学技术研究院有限公司 | Full-process simulation test system for loss of coolant accident |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107525762A (en) * | 2017-10-17 | 2017-12-29 | 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 |
| CN108548859A (en) * | 2018-06-11 | 2018-09-18 | 遵义师范学院 | A kind of direct measurement device of solid pollutant COD and its assay method |
| 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 |
| CN115376395A (en) * | 2022-08-05 | 2022-11-22 | 国家电投集团科学技术研究院有限公司 | Full-process simulation test system for loss of coolant accident |
| 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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