CN102519863A - Supercritical steam oxidization test device - Google Patents
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- CN102519863A CN102519863A CN2011104203976A CN201110420397A CN102519863A CN 102519863 A CN102519863 A CN 102519863A CN 2011104203976 A CN2011104203976 A CN 2011104203976A CN 201110420397 A CN201110420397 A CN 201110420397A CN 102519863 A CN102519863 A CN 102519863A
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Abstract
The invention provides a supercritical steam oxidization test device, which is characterized by comprising a fluid control assembly; the fluid control assembly is connected to a water treatment assembly and a reaction container assembly through a pipeline respectively; the water treatment assembly is connected to the reaction container assembly through a pipeline; the fluid control assembly, the water treatment assembly and the reaction container assembly commonly form a medium circular flow loop; the reaction container assembly is arranged in a heating furnace; temperatures of the heating furnace and the reaction container assembly are controlled by a temperature control system; and the fluid control assembly and the temperature control system are monitored by a data monitoring assembly. The supercritical steam oxidization test device provided by the invention is a test device capable of simulating a high-temperature high-pressure steam environment of a (ultra) supercritical power station boiler and relates to a whole set of technical solution. The device has the advantages of being low in manufacture difficulty, high in economical efficiency, allaround in function, simple and convenient for operation, precise for control, safe and reliable and is applied to being widely popularized and used in laboratories and can satisfy requirements of scientific researches and engineering tests.
Description
Technical field
The present invention relates to a kind of metal material steam oxidation test unit; The major function of this device is: can under laboratory condition, realize the high-temperature high-pressure steam environment in ultra (surpassing) the critical parameters boiler element of simulation, be used for studying the anti-steam oxidation performance of metal material at the oxidation behavior and the evaluating material of supercritical water steam ambient.
Background technology
Because supercritical water steam has the oxidisability stronger than air, the inwall severe oxidation often takes place in parts such as Utility Boiler Superheater, reheater, jet chimney in operational process.The oxide skin of in the unit shutdown process, peeling off can be stopped up elbow, the obstruction air current flow causes the boiler overheat booster; The oxide particle that steam flow carries gets into steam turbine can cause problems such as nozzle of steam turbine, preceding grade blade solid particle erosion, the harm safe operation of the boiler.For improving generating efficiency, the unit design parameter is also improving constantly, and it is more outstanding that the steam oxidation problem can become from now on, and in ultra (surpassing) critical power station of current extensive operation, the accident that steam oxidation causes takes place in a large number.Be research and solution steam oxidation problem; Researcher both domestic and external has been carried out great deal of laboratory tests and analytical work; But generally receive the restriction of testing equipment condition; Main difficulty is the high pressure (> 22.5MPa that how to reach ultra (surpassing) critical boiler water steam simultaneously), thermal technology's condition of high temperature (566～620 ℃), three aspects that flow, and the requirement of feedwater dissolved oxygen amount control.Through investigation, summing up existing equipment has following shortcoming:
(1) commonly used pyroreaction still working pressure is often lower in the laboratory, does not reach the supercritical water vapor pressure, and agitated reactor is enclosed construction, can think static atmosphere, and wherein the water vapour quality can be gathered and destroys owing to reaction product.
(2) more in the laboratory is to run on the steam oxidation test unit that circulates under the low pressure condition, for example: patent CN 101118211 B " high-temperature steam oxidation test device ", deionized water is transmitted by volume pump through deoxygenation; Be heated as high-temperature steam through preheating furnace; Be sent to reacting furnace, the steam of discharge recycles through condenser again; Because system pressure is not high, technical being easy to realized.Patent CN 10162661 B " metal material high temperature water vapor oxidation experiment device " are also similar basically, just produce steam through steam generator, and the force steam that relies on the continuous vaporized expanding of water to produce flows.These work bring many helps for experimental study, but do not possess condition of high voltage, and test technology can't be simulated actual condition, and the test findings cogency is not enough.
(3) have only the Individual testwas chamber to set up the testing equipment that to realize surpassing (surpassing) critical steam condition abroad; For example: breadboard steam oxidation device (the I. Wright of U.S. NETL; Clean Coal Technology Advanced Materials Program-Overview of Steam Oxidation Task; Presentation at 23rd Annual Conference on Fossil Energy Materials, NETL, 2009.); Supercritical water oxidation device (the L. Tan of U.S. Wisconsin – Madison university; X. Ren; K. Sridharan, T.R. Allen, Corrosion Behavior of Ni-base Alloys for Advanced High Temperature Water-Cooled Nuclear Plants; Corrosion Science, 50 (2008) 3056 – 3062.); Japan Nippon Steel company (Y. Otoguro, M.Sakakibara, T. Saito; H. Ito, Y. Inoue, Oxidation Behavior of Austenitic Heat-resisting Steels in a High Temperature and High Pressure Steam Environment; Transactions ISIJ; Vol. experiment table 28,1988, pp. 761-768.).The domestic supercritical water oxidation experimental provision (Wang Baofeng, Lu Jianshu, the Zhang Jiuyuan that have Zhejiang Polytechnical University to develop to be used for wastewater treatment that is shown in report; The foundation of supercritical water oxidation experimental provision, Zhejiang Polytechnical University's journal, Vol.29; No.1,2001, pp.1-4.); But its running parameter can only reach 25MPa/450 ℃, far below ultra (surpassing) critical steam condition of station boiler.The essential characteristic of said apparatus on process realizes is: combination realizes that condition of high voltage, sample place agitated reactor, water is heated to set point of temperature, discharge through a plurality of heating furnaces (or heating jacket) classification steam water-cooled again through the water-cooled discharge or after being used for the preheating supply line with counterbalance valve to rely on high-pressure pump.But said apparatus will generally be applicable to Routine Test Lab, still exists many technical matterss to need to solve, as:
1) the high-temperature high-voltage reaction container adopts heat-resisting steel or alloy forged piece manufacture difficulty big and involve great expense;
2) a plurality of heater heats efficient of medium are not high;
The high temperature and high pressure steam direct water-cooling of 3) discharging needs purer deionized water to make cost increase (the tap water cooling causes pressure piping stress corrosion easily);
The high temperature and high pressure steam of 4) discharging directly gets into counterbalance valve and then requires to select for use special high temperature resistant counterbalance valve, and cost is high, reliability decrease;
5) the low mechanism that makes on the contrary of high temperature and high pressure steam preheating feedwater efficient that discharges is complicated;
6) operability of device is not good, etc.
In addition, all do not provide good solution for control feedwater dissolved oxygen content aspect said apparatus.
Summary of the invention
The present invention is directed to the deficiency of existing test unit; A kind of test unit of ultra (surpassing) critical station boiler high-temperature high-pressure steam environment and a whole set of technical solution simulated is provided; The device fabrication difficulty is little, economy is high, complete function, easy and simple to handle, control accurate, safe and reliable; Be suitable in the laboratory, extensively promoting the use of, satisfy the needs of scientific research and engineering test.
In order to achieve the above object; Technical scheme of the present invention has provided a kind of supercritical water steam oxidation test device; It is characterized in that: comprise the fluid Control Component, fluid Control Component pipeline respectively connects water treatment assembly and reaction vessel assembly, water treatment assembly pipeline coupled reaction container assemblies; Fluid Control Component, water treatment assembly and reaction vessel assembly form the medium circulation flow circuits jointly; The reaction vessel assembly places in the heating furnace, and the temperature of heating furnace and reaction vessel assembly is controlled by temperature-controlling system, is monitored by data monitoring assembly convection cell Control Component and temperature-controlling system.
Preferably; Said fluid Control Component comprises high-pressure metering pump, damper and the safety valve of series connection and the counterbalance valve that links to each other with said water treatment assembly; The inlet end of high-pressure metering pump connects said water treatment assembly; The endpiece of safety valve connects said reaction vessel assembly, and a termination of pressure transducer is gone between damper and the safety valve, and the other end is connected to said data monitoring assembly.
Preferably; Said water treatment assembly comprises first distilled water tank; Heat exchanger is located in first distilled water tank, and the two ends of heat exchanger are connected said reaction vessel assembly and said counterbalance valve through reaction vessel outlet steam pipe respectively with the counterbalance valve inlet tube, and the inlet of first distilled water tank connects the outlet of said counterbalance valve; The outlet of first distilled water tank connects the inlet of after-fractionating water tank; In the after-fractionating water tank, be provided with electric heating tube, an end of water collar connects the outlet of after-fractionating water tank, and the other end connects the gas inlet pipe that places in the feed-tank; Feed-tank connect said high-pressure metering pump to water out, argon gas in argon gas steel cylinder and the oxygen bottle and oxygen converge behind the reduction valve through separately and the flowrate control valve respectively in the pipeline between the inlet of outlet and after-fractionating water tank that input connects first distilled water tank.
Preferably; Said reaction vessel assembly comprises the duct type reaction vessel of being processed by heat-resisting steel or high temperature alloy, is welded with the steel high pressure flange at the medium input end of duct type reaction vessel, on the blind flange of steel high pressure flange, has the medium inlet; Medium output terminal at the duct type reaction vessel is welded with heat-resisting steel or high temperature alloy system end cap; On end cap, have media outlet, small-bore heat-resisting steel or high temperature alloy interpolation pipe pass the inner chamber that the steel high pressure flange inserts the duct type reaction vessel, and the welding shutoff of interpolation pipe one end also is equipped with centring ring; In its other end, be inserted with the inner chamber thermopair; The inner chamber thermopair connects said temperature-controlling system, around interpolation pipe, is welded with the pin that is used to hang sample, is with the flow-disturbing mechanism that is made up of throttle at the leading portion of interpolation pipe.
Preferably, the external diameter of said duct type reaction vessel is 50～70mm, and wall thickness is 10～15mm.
Preferably, be provided with the temperature-control heat couple group at the inner chamber of said heating furnace, the temperature-control heat couple group connects said temperature-controlling system.
Preferably, be wrapped with muff at said reaction vessel assembly with the pipeline that said fluid Control Component links to each other.
Fluid Control Component of the present invention, reaction vessel assembly, heating furnace and temperature-controlling module are realized thermal technology's condition of steam jointly.Each assembly relevant device and component specification are suitably selected; Can reach that steam oxidation test and research institute pay close attention to surpass (surpassing) critical even more elevated steam conditions and parameter are adjustable; Though steam flow receives the restriction of laboratory available energy source power; The throughput ratio that generally can reach is less, and (feedwater 1～10L/h) guarantees enough that still the steam quality in the reaction vessel keeps fresh.Select for use pipeline as reaction vessel, manufacture difficulty and cost reduce, and can directly place heating furnace heating and insulation; The soaking zone scope is big; Guarantee enough test spaces,, help improving steam flow rate because internal diameter of the pipeline is less; The flange arrangement easy accessibility is adopted in the reaction vessel medium inlet, and the reaction vessel interpolation pipe has three functions concurrently: interior plug in thermopair is used to measure vapor (steam) temperature, burn-ons that pin is used to hang sample, preheating section is installed flow-disturbing mechanism makes the steam flow homogeneous heating all around.Heating furnace preheating section and soaking zone integrated design, the efficiency of heating surface is high, thermal loss is few, temperature control precision is high.
Water treatment assembly of the present invention realizes that recycle, the water quality of water are purified and the target of dissolved oxygen control.The ingenious water that utilizes the heat circulation distillation reaction container discharge of reaction vessel outlet steam; Because the water that heat exchanger places reaction vessel to discharge, water quality is pure can not to cause stress corrosion, through the dual distillation of first distilled water tank and after-fractionating water tank; Fully purify; The cycling and reutilization that need not complicated ion-exchange treatment promptly reaches water, and tap water can be directly used in the distilled water condensation, easy, cheap.The air mixing machine structure of argon gas and oxygen can be advantageously used in the control (adjustable from several ppb to several ppm scopes) to water degassing and dissolved oxygen amount through regulating flow controller change gas ratio.Because water technology stability is high, feedwater only needs periodic monitoring, can save real-time water quality monitoring instrument for general requirement.
Description of drawings
Fig. 1 is the structural representation of a kind of supercritical water steam oxidation test device provided by the invention.
Wherein: 1-high-pressure metering pump, 2-damper, 3-pressure transducer, 4-safety valve, 5-steel high pressure flange, 6-duct type reaction vessel, 7-interpolation pipe; 8-flow-disturbing circle, 9-pin, 10-sample, 11-centring ring, 12-end cap, 13-heating furnace, 14-temperature-control heat couple group; 15-inner chamber thermopair, 16-temperature-controlling system, 17-muff, 18-heat exchanger, 19-counterbalance valve, 20-first distilled water tank, 21-valve; 22-after-fractionating water tank, 23-view window, 24-electric heating tube, 25-valve, 26-water collar, 27-feed-tank; The 28-view window, 29-gas inlet pipe, 30-valve, 31-water seal, 32-argon bottle, 33-argon gas reduction valve; The 34-flow controller, 35-welding bottle, 36-oxygen reduction valve, 37-flow controller, 38-liquid crystal display, 39-computing machine.
Embodiment
For making the present invention more obviously understandable, now with a preferred embodiment, and conjunction with figs. elaborates as follows.
As shown in Figure 1; A kind of supercritical water steam oxidation test device provided by the invention comprises fluid Control Component, reaction vessel assembly, heating furnace and temperature-controlling module, water treatment assembly, data monitoring assembly five parts; Wherein fluid Control Component, reaction vessel assembly and water treatment assembly are communicated with through stainless-steel tube and pipe adapter, form the medium circulation flow circuits.
The fluid Control Component comprises: high-pressure metering pump 1, can generally select maximum working pressure (MOP) according to the testing requirements type selecting>and 30MPa, maximum flow>10L/h, pump discharge is provided with damping mechanism, is damper 2; Counterbalance valve 19, the pressure in adjusting and the stable high voltage loop is in test pressure ± 0.3MPa fluctuation; Pressure transducer 3; Safety valve 4.
The reaction vessel assembly comprises: the duct type reaction vessel of being processed by heat-resisting steel or high temperature alloy 6; Select external diameter 50～70mm; Wall thickness 10～15mm; But long-time running is applicable to the temperature and pressure requirement of power station material water steam oxidation test research fully in ultra (surpassing) the critical more elevated steam conditions that reaches; The medium input end welding steel high pressure flange 5 of duct type reaction vessel 6 has the medium inlet on the blind flange; The medium output terminal welding heat-resisting steel of duct type reaction vessel 6 or the end cap 12 of high temperature alloy system have media outlet on the end cap 12; The interpolation pipe 7 of small-bore heat-resisting steel or high temperature alloy passes the inner chamber that steel high pressure flange 5 inserts duct type reaction vessel 6; The one end welding shutoff of interpolation pipe 7 also is equipped with centring ring 11; The other end can insert inner chamber thermopair 15 and get into its inner chamber, is used to monitor the internal temperature of duct type reaction vessel 6, is welded with pin 9 around it and is used to hang sample 10; Its leading portion is with the flow-disturbing mechanism that is made up of flow-disturbing circle 8, makes the steam of flowing through evenly mixed.
Heating furnace and temperature-controlling module comprise: the opposite opened tubular heater 13 of multistage heating; Can be according to testing requirements; Along MEDIA FLOW to establishing 3～5 sections preheating sections, and 3～5 sections soaking zones, maximum operating temperature is more than 800 ℃; Soaking zone (temperature deviation ± 3 ℃ in) is more than the length 400mm, to guarantee all even enough sample spatial accommodations of vapor (steam) temperature in the test chamber; By the temperature control system 16 that parts such as temperature-control heat couple group 14, compensating wire, control device are formed, can set and control the temperature of seven sections each sections of heating furnace respectively.
The water treatment assembly comprises: first distilled water tank 20 of stainless steel; Hermetically-sealed construction; Built-in stainless steel helix tube heat exchanger 18, the two ends of heat exchanger 18 are coupled reaction container outlet steam pipe and counterbalance valve inlet tube respectively, and the inlet of first distilled water tank 20 receives the water from counterbalance valve 19 outlets; The steam that vaporization produces in first distilled water tank 20 and a small amount of aqueous water that possibly carry are discharged through outlet, are provided with valve 21 in first distilled water tank, 20 bottoms; The after-fractionating water tank 22 of stainless steel; Hermetically-sealed construction; Inlet receives the steam and the water of discharging from first distilled water tank 20, after-fractionating water tank 22 built-in stainless electric heating tubes 24, and water vapour is discharged through outlet; After-fractionating water tank 22 bottoms are provided with valve 25, and after-fractionating water tank 22 tops are equipped with view window 23; Water collar 26, the stainless steel helix tube condensation of vapor stream in being immersed in water collar 26 that after-fractionating water tank 22 is discharged, water collar 26 constantly feeds tap water and hot water is discharged outdoor; The feed-tank 27 of stainless steel, hermetically-sealed construction compiles at this from the condensate water of water collar 26, and as the water source of high-pressure metering pump 1, feed-tank 27 input pipes are inserted into water tank bottom, and water tank bottom is provided with valve 30, and water tank upper is equipped with view window 28; The air mixing machine structure; From the argon gas of argon bottle 32 and from the oxygen of welding bottle 35 through behind separately argon gas reduction valve 33 and flow controller 34 and oxygen reduction valve 36 and the flow controller 37; Argon gas and oxygen are joined and are got into gas transmission pipeline; Gas stream value through setting flow controller makes two kinds of gases export by arbitrary proportion, and argon gas and oxygen continue to feed from after-fractionating water tank 22 inlets, flow through water collar 26 and feed-tank 27; After water seal 31 is discharged to atmosphere, online analytical instrument of water quality (dissolved oxygen meter, conductivity meter, PH meter etc.) obtains the water sample periodic monitoring from the valve of feed-tank 27; The transparent organic glass pipe of suitable height water column is equipped with in water seal 31, and mixed air shooter is inserted into the water seal bottom through rubber plug.
Said data monitoring assembly comprises: measuring-signal processing apparatus such as temperature, pressure; LCDs 38 is used for data in real time and shows; Computing machine 39 is used for data storage and analysis.
Constituent relation between above-mentioned each assembly is: serve as theme with fluid Control Component and reaction vessel assembly; High-pressure metering pump 1 → duct type reaction vessel 6 → counterbalance valve 19 → high-pressure metering pump 1 constitutes basic fluid circuit; High-pressure metering pump 1 is the hydrodynamic force source of system, embeds water treatment component loops polished feedwater in the loop.Reaction vessel assembly inlet connects high-pressure metering pump 1 outlet; The outlet of reaction vessel assembly connects heat exchanger 18 hot junctions of water treatment assembly; Heat exchanger 18 cold junctions of water treatment assembly connect counterbalance valve 19 inlets; Counterbalance valve 19 outlets connect first distilled water tank, 20 inlets of water treatment assembly, and feed-tank 27 outlets of water treatment assembly connect high-pressure metering pump 1 inlet again.Heating furnace 13 and temperature-controlling module are the origin of heat of system, act on the reaction vessel assembly to realize hot conditions.The data monitoring assembly is as the subsidiary function unit, the record of ensuring equipment course of work temperature, pressure data.
Apparatus of the present invention are at normal operating condition, and its course of work is: as starting point, its outlet is equipped with damper 2 and is pulsed with compensator or trimmer pressure with high-pressure metering pump 1; Through pressure transducer 3 monitoring pressures, if super high pressure accident takes place, pressure surpasses the set pressure of safety valve 4; Safety valve 4 is opened pressure release automatically; Water gets into duct type reaction vessels 6 through steel high pressure flange 5, through 13 3 sections in heating furnace step by step preheating and flow-disturbing circle 8 mix the steam that vapour generate under the test temperatures and get into four sections insulation soaking zones, the sample 10 that is positioned at the zone, soaking zone hangs on pins on 9; Cavity temperature is through the temperature-control heat couple group 14 and 15 monitorings of inner chamber thermopair of temperature-controlling system 16 in the temperature of heating furnace 13 and the duct type reaction vessel 6; Inner chamber thermopair 15 can be adjusted monitoring location through moving up and down, and the outlet conduit of duct type reaction vessel 6 is enclosed with muff 17, reduces thermal loss and is not less than 380 ℃ to guarantee the vapor (steam) temperature that gets into heat exchanger 18; Steam is cooled to about 100 ℃ through heat exchanger 18; Water under high pressure is reduced to a small amount of aqueous water entering after-fractionating water tank 22 that low-pressure water is injected the steam that vaporization produces in first distilled water tank, 20, the first distilled water tanks 20 and carried, after-fractionating water tank 22 bottom electrical heating tubes 24 continuous heat make-up quantity of steams through counterbalance valve 19 again; Steam is condensed into aqueous water through water collar 26 and injects feed-tank 27; Because the water in the circulation entering feed-tank 27 is dual distilled water, water quality is fully guaranteed, and after-fractionating water tank 22 can see through view window 23 and view window 28 monitoring water levels and the interior situation of case with feed-tank 27; Argon gas and oxygen atmosphere are delivered to flow controller 34, flow controller 37 with welding bottle 35 through argon gas reduction valve 33 and oxygen reduction valve 36 from argon bottle 32 respectively and are exported in proportion; Through after-fractionating water tank 22 and water collar 26, arrive feed-tank 27, give water degassing and make dissolved oxygen amount reach setting; Discharge gas through water seal 31 at last, water seal 31 also causes water treatment component internal normal pressure to avoid outside air to get into.Generally do not need the laboratory technician to intervene in the normal process of the test, device is operation automatically, and the temperature and pressure signal is through liquid crystal display 38 and computing machine 39 records.
Preliminary work before the device work comprises sample installation, system evacuation, water filling and water treatment.Sample is suspended on the pin 9 of duct type reaction vessel 6 interpolation pipes, and duct type reaction vessel 6 is synthetic through 5 assemblings of steel high pressure flange, and the reaction vessel assembly that assembles is connected in the loop, and places heating furnace 13.The air of internal system can or vacuumize the mode emptying through argon purge.Feed-tank 27 injects the sufficient water yield; The initial water that injects is generally ultrapure water or station boiler feedwater; Argon gas and oxygen atmosphere are delivered to flow controller 34, flow controller 37 with welding bottle 35 through argon gas reduction valve 33 and oxygen reduction valve 36 from argon bottle 32 respectively and are exported in proportion; Through after-fractionating water tank 22 and water collar 26, arrive feed-tank 27, after water seal 31 discharges.
After feed water analysis is qualified, start high-pressure metering pump 1, make duct type reaction vessel 6, first distilled water tank 20, after-fractionating water tank 22 inject water, stop high-pressure metering pump 1 then, the back pressure pressure of high-pressure metering pump 1 flow and counterbalance valve 19 is set.Start heating furnace 13, control system 16 will reach design temperature automatically gradually, opens high-pressure metering pump 1 once more, on-test.
During off-test, stop high-pressure metering pump 1, heating furnace 13 gets final product, reaction vessel slowly cools off with stove, opens reaction vessel 6 and takes out samples, sample is used for analyzing after drying and research.Through changing test temperature, pressure, feedwater dissolved oxygen amount or other parameter, can the oxidation behavior of research material under different condition; Through changing test period, obtain the data of different time oxidation test, can be used for drawing out material water steam oxidation kinetic curve; According to the oxidation test result of different materials under the identical parameters condition, antioxygenic property that can comparative material.
Many or need carry out the test of different temperatures for sample size, can be on the loop parallelly connected reaction vessel assembly and corresponding heating furnace and temperature-controlling module, with the test capability of expanding unit, thereby save test period and cost.
Claims (7)
1. supercritical water steam oxidation test device; It is characterized in that: comprise the fluid Control Component; Fluid Control Component pipeline respectively connects water treatment assembly and reaction vessel assembly; Water treatment assembly pipeline coupled reaction container assemblies, fluid Control Component, water treatment assembly and reaction vessel assembly form the medium circulation flow circuits jointly, and the reaction vessel assembly places in the heating furnace (13); The temperature of heating furnace (13) and reaction vessel assembly is monitored by data monitoring assembly convection cell Control Component and temperature-controlling system (16) by temperature-controlling system (16) control.
2. a kind of supercritical water steam oxidation test device as claimed in claim 1; It is characterized in that: said fluid Control Component comprises high-pressure metering pump (1), damper (2) and the safety valve (4) of series connection and the counterbalance valve (19) that links to each other with said water treatment assembly; The inlet end of high-pressure metering pump (1) connects said water treatment assembly; The endpiece of safety valve (4) connects said reaction vessel assembly; One termination of pressure transducer (3) is gone between damper (2) and the safety valve (4), and the other end is connected to said data monitoring assembly.
3. a kind of supercritical water steam oxidation test device as claimed in claim 2; It is characterized in that: said water treatment assembly comprises first distilled water tank (20); Heat exchanger (18) is located in first distilled water tank (20); The two ends of heat exchanger (18) are connected said reaction vessel assembly and said counterbalance valve (19) through reaction vessel outlet steam pipe respectively with the counterbalance valve inlet tube; The inlet of first distilled water tank (20) connects the outlet of said counterbalance valve (19); The outlet of first distilled water tank (20) connects the inlet of after-fractionating water tank (22); In after-fractionating water tank (22), be provided with electric heating tube (24), an end of water collar (26) connects the outlet of after-fractionating water tank (22), and the other end connects the gas inlet pipe (29) that places in the feed-tank (27); Feed-tank (27) connect said high-pressure metering pump (1) to water out, argon gas in argon gas steel cylinder (32) and the oxygen bottle (35) and oxygen converge behind the reduction valve through separately and the flowrate control valve respectively in the pipeline between the inlet of outlet and after-fractionating water tank (22) that input connects first distilled water tank (20).
4. a kind of supercritical water steam oxidation test device as claimed in claim 2; It is characterized in that: said reaction vessel assembly comprises the duct type reaction vessel of being processed by heat-resisting steel or high temperature alloy (6); Medium input end at duct type reaction vessel (6) is welded with steel high pressure flange (5); On the blind flange of steel high pressure flange (5), have the medium inlet; Medium output terminal at duct type reaction vessel (6) is welded with heat-resisting steel or high temperature alloy system end cap (12); On end cap (12), have media outlet, small-bore heat-resisting steel or high temperature alloy interpolation pipe (7) pass the inner chamber that steel high pressure flange (5) inserts duct type reaction vessel (6), and the welding shutoff of interpolation pipe (7) one ends also is equipped with centring ring (11); In its other end, be inserted with inner chamber thermopair (15); Inner chamber thermopair (15) connects said temperature-controlling system (16), around interpolation pipe (7), is welded with the pin (9) that is used to hang sample (10), is with the flow-disturbing mechanism that is made up of throttle (8) at the leading portion of interpolation pipe (7).
5. a kind of supercritical water steam oxidation test device as claimed in claim 4 is characterized in that: the external diameter of said duct type reaction vessel (6) is 50～70mm, and wall thickness is 10～15mm.
6. a kind of supercritical water steam oxidation test device as claimed in claim 1 is characterized in that: the inner chamber at said heating furnace (13) is provided with temperature-control heat couple group (14), and temperature-control heat couple group (14) connects said temperature-controlling system (16).
7. a kind of supercritical water steam oxidation test device as claimed in claim 1 is characterized in that: the pipeline that links to each other with said fluid Control Component at said reaction vessel assembly is wrapped with muff (17).
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| CN110132827A (en) * | 2019-04-12 | 2019-08-16 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | A kind of high-temperature steam oxidation test device |
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| CN109974999A (en) * | 2019-04-25 | 2019-07-05 | 西安热工研究院有限公司 | A kind of superheater reheater oxide skin falls off dynamic simulant test apparatus and method |
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