CN106596386B - A kind of simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus and method - Google Patents
A kind of simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus and method Download PDFInfo
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- CN106596386B CN106596386B CN201610962792.XA CN201610962792A CN106596386B CN 106596386 B CN106596386 B CN 106596386B CN 201610962792 A CN201610962792 A CN 201610962792A CN 106596386 B CN106596386 B CN 106596386B
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/02—Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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Abstract
The present invention provides vehicle repair major corrosion testing apparatus and experimental method inside a kind of simulation air cooling tubes condenser metallic conduit, and experimental rig has deaerating type of cycles, cyclic water tank, simulation etching tank, circulating water treatment and monitoring system.Cyclic water tank, which is placed in water-bath, keeps constant temperature, and water-bath upper end is covered with cystosepiment.The thin tracheae of a piece connection nitrogen cylinder is inserted into water tank bottom, and water tank upper tubule exports and connects vacuum pump.It simulates and is inserted into electrode, test piece and thermometer in etching tank, simulation etching tank is connect with tank pipe.Water tank reconnects a water process and monitoring device, and it is iron-free system that whole system, which uses glass and silicone tube, and total is simple, and operation is simple, can be compared with real simulation site environment.
Description
Technical field
The invention patent relates to simulation thermal power plant's experimental systems, and in particular to arrives a kind of simulation thermal power plant Direct Air-Cooled condensing
Vapour-liquid two-phase flow accelerated corrosion pilot system inside device metallic conduit.
Background technique
Thermal power generation consumption is not only the disposable energy, and there are also water resources, and water resource shortage is current whole world face
The a great problem faced.Show that whole world fresh water consumption increases six from the beginning of this century according to the statistics of the United Nations recent years
It is twice higher than the speed that population increases to seven times.80 about 1,500,000,000 populations of country are faced with freshwater resources in the world at present
Deficiency, wherein 26 about 300,000,000 populations of country are lived in exsiccosis completely.The per capita water in China only has the world
The a quarter of occupancy volume per person ranks the first in the world 110, is classified as one of 13 poor-water states by the United Nations.And
China's distribution of water resources is extremely uneven, and in northern area, the area of especially some rich coal resources is often again water resource
Opposite " rich coal poor-water " area lacked, this requirement that must have coal and water with construction large electric power plant station produce contradiction, cause
Large-scale conventional Condensing steam turine is set to be restricted in the construction in China.The trans-regional scheduling scheme of coal is such as used, on the one hand cannot be protected
It demonstrate,proves ground abundant producing coal to be timely transported, on the other hand also increases the pressure of traffic transport industry.It is fast in order to adapt to national economy
Demand of the speed development to electric power resource develops the air cooling turbo-generator having no water or little water and is undoubtedly effectively arranging of solving the above problems
The problem of applying, while also solving to local water resource pollution.
Since direct air cooling system is huge, leakage point is more, it is easy to air be caused to leak into negative pressure system to cause
The dissolved oxygen amount of condensed water is above standard (generally in 100-500 μ g/L, highest, oxygen content of condensate reaches 547 μ g/L)；National standard
GB/T 12145(thermal power generation unit and apparatus of steam power plants Water Vapor Quality) as defined in Condensate of Direct Air-cooling Unit dissolved oxygen
Concentration standard value should be less than 100 μ g/L.Because of factors such as cost, operations, the material for building air cooling tubes condenser at present is mainly carbon steel
(20G), it is single that carbon steel seriously corroded in high temperature dissolved oxygen water environment, especially high flow rate exhaust steam in steam turbine cause air cooling system to occur
The flowing accelerated corrosion (FAC) of phase and gas-liquid two-phase causes unit water-steam system iron content to severely exceed, and then brings more serious
Etching problem.
It there is no the standard for instructing air cooling unit chemistry to run at present, the air cooling unit to have put into operation is generally referring to wet type cooling unit
Related chemistry operating index is controlled, and the FAC phenomenon of the generally existing carbon steel part of air cooling unit is caused.Existing research is air-cooled solidifying
The method of vapour equipment matter etching characteristic under the runtime environment, mainly laboratory simulation are studied, and existing imitative experimental appliance is only
Single liquid phase flowing environment can be simulated, internal system cannot accomplish no metal, and oxygen removal efficiency is low, and cannot accomplish in negative pressure item
Part Imitating, so that the basic object of simulated experiment is not achieved, it is big with live actual environment gap.And real simulation scene is corroded
Condition understands fully its corrosion mechanism, reduces or inhibits corrosion, to make concentration of iron in entire water-steam system that will get off, protects
Entire heat power equipment and raising resin water production and the cycle of operation, there is great theory significance and practical significance.
Summary of the invention
For existing problem, the present invention provides a kind of vapour-liquid two-phase flow accelerated corrosion imitative experimental appliance and
Method, according to Gas- liquid two-phase flow environmental data inside practical Air-cooling Condenser in Thermal Power Plant metallic conduit, in same covering device
The corrosion simulated research of Gas- liquid two-phase flow is carried out simultaneously, to grasp direct air cooled condenser Metal pipeline corrosion row in thermal power plant
For, rule and mechanism, and live corrosion can be reduced in a kind of laboratory research suitable Compositional antiseptic agent, this is to thermoelectricity
The safe and highly efficient operation of factory is significant.
To achieve the goals above, main component of the present invention has water tank, thermostat water bath, test piece slot, small mixed bed, vacuum
Pump, dosing mouth, dissolved oxygen meter, nitrogen cylinder, thermometer, electrode, lacing film, gas flowmeter, fluid flowmeter, magnetic drive pump, pH meter,
Conductivity meter.The transparent glass water tanks of cube structure are put into the water-bath equipped with water, and tank top is driveed there are two hole, and one
Hole is popped one's head in for dissolved oxygen gas meter, is sealed with silica gel plug, another hole is sealed with rubber stopper, and the gas tube of two diameter 2mm is worn
Rubber stopper is crossed, nitrogen cylinder and vacuum pump are separately connected；One dosing mouth is set again on rubber stopper；Silica gel is vertically connected on the right side of water tank
Pipe, above steam (vapor) outlet, below liquid outlet；Water tank left lower connects silicone tube, mixes entrance for vapour-liquid.Above-mentioned silicone tube
It is connect with test piece slot, has gas magnetic drive pump and adjustable gas flowmeter among steam pipe, there is liquid magnetic pump among liquid line
Thermometer is fixedly mounted with adjustable fluid flowmeter test piece slot upper end；Piston is arranged at top, is inserted into three-electrode system and fixation
The shelf of test piece, test piece slot are sealings；Three-electrode system connects electrochemical workstation.A pipeline is separated in liquid line outlet to connect
Small mixed bed column and Water-quality Monitoring Points are connect, water quality monitoring is pH meter and conductivity meter.
Water tank capacity of the present invention is that temperature sensor connects water-bath in 3L test piece slot, in thermostat water bath panel
In show, and can be constant in this temperature, temperature automatic control is simultaneously continuous settable.Vacuum pump is used before heating up in water tank
Extraction the inside gas, is under larger condition of negative pressure, and when heating vapour content in gas phase can increase.
Liquid in water tank of the present invention is 2L high purity water to be put into water tank, then be added in medicine control liquid by dosing mouth
Each material concentration.Oxygen concentration is controlled by the way of nitrogen charging deoxygenation, nitrogen tube is inserted under liquid level, and water tank bottom has an exhaust pipe,
Exhaust pipe connects vacuum pump, and when nitrogen charging starts vacuum pump.
The present invention realizes that Gas- liquid two-phase flow simulates detailed process are as follows: after the completion of dosing deoxygenation, while starting gas magnetic force
Pump and liquid magnetic pump adjust flow by flowmeter, when steam and liquid enter test piece slot simultaneously, trying liquid and steam
Piece or working electrode surface flowing.
Small mixed bed column of the present invention starts after the completion of an experimental period, opens water process valve, controls aperture
Make the small-sized mixed bed column that flows through in water tank, the pH and conductance of direct water are horizontal to qualification.
Compared with prior art, the present invention its structure is simple, simulation validity is high, easy to operate, is not necessarily in operational process
Personnel keep an eye on, high degree of automation, can really reflect Air-cooling Condenser in Thermal Power Plant corrosion condition, thus make really evaluation and
Corrosion mechanism research can be brushed by the present apparatus and experimental program and select suitable preservative to protect air cooling tubes condenser metal tube
Road.
Fig. 1 is main structure schematic illustration of the invention.1 is water tank in figure, and 2 be water-bath, and 3 be vacuum pump, and 4 be to add
Medicine mouth, 5 be dissolved oxygen meter, and 6 be nitrogen cylinder, and 7 be exhaust pipe, and 8 be air inlet pipe, and 9 be thermometer, and 10 be electrode 11 be lacing film, 12
It is gas flowmeter for lacing film slot (slot electrode), 13,14 be fluid flowmeter, and 15 pump for liquid magnetic, and 16 be gas magnetic drive pump,
17 be mixed bed (resin column), and 18 be pH meter, and 19 be conductivity meter, and 20 be nitrogen inlet.
Specific embodiment:
It is described further by way of example and in conjunction with the accompanying drawings.
The main structure of the present embodiment includes water tank 1, thermostat water bath 2, test piece slot 12, small mixed bed 17, vacuum pump 3, adds
Medicine mouth 4, dissolved oxygen meter 5, nitrogen cylinder 6, thermometer 9, electrode 10, lacing film 12, gas flowmeter 13, fluid flowmeter 14, liquid
Magnetic drive pump 15, gas magnetic drive pump 16, pH meter 18, conductivity meter 19.The fixed dissolution of 1 upper opening of water tank of square glass structure
Oxygen table 5 is popped one's head in, and probe has silica gel plug sealing, and top, which is also open, is inserted into rubber stopper, rubber stopper punching two tubule of insertion, and one
Root nitrogen tube 8 is used to pour nitrogen, and there are also a vacuum-pumping tubes to connect a vacuum pump, and a dosing mouth is in addition also set up on rubber stopper
4,1 top two sides of water tank are separately connected two silicone tubes, and right side is steam outlet, and left side is processing water inlet, 1 lower part of water tank
There is 8 nitrogen outlet 20 of nitrogen tube, connection water outlet silicone tube, left side connect carbonated drink entrance silicone tube on the right side of lower part；On test piece slot 12
Rubber stopper is inserted on portion's fixed thermometer 9, top, insertion electrode sealing among rubber stopper, and test piece slot top has and can fix test piece 11
Rubber stopper, with silicone tube such as Fig. 1 connection among water tank and test piece slot, in addition water tank is connected with small-sized mixed bed 17, wherein also
Measuring instrument pH meter 18 and conductivity table 19, mixed bed are used for the complete post-processing Water in Water Tanks of one group of experiment.
Simulated experiment first passes through 1 top of water tank and a certain amount of high purity water is added, and required medicine is added by calculating toward dosing mouth 4
Product are linked into 3 test pieces in test piece slot, and electrode 10 is inserted into electrode, after checking leakproofness, open nitrogen inlet valve and open simultaneously very
Sky pump, carries out deoxygenation, monitors oxygen in water by dissolved oxygen meter 5, and the magnetic drive pump between water tank and test piece slot is opened when deoxygenation
With valve, nitrogen is closed when dissolved oxygen meter reading, which reaches, tests required condition into library valve, then proceedes to vacuumize, a period of time
Vacuum valve and vacuum pump 3 are closed afterwards, temperature is then set on water-bath panel, and the real time temperature on water-bath panel is temperature
The temperature that degree meter 9 is passed back.It is covered and is sealed with cystosepiment on water-bath.After a cycle is completed in experiment, magnetic drive pump and valve are closed
Door starts water treatment system, passes water through mixed bed column 17, monitors water quality by pH meter and conductivity table, closes after water quality is qualified
Close water treatment system.
Claims (1)
1. a kind of simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus, it is characterised in that without molten in entire obturator
Liquid is directly contacted with metal parts, can be flowed simultaneously compared with real simulation air cooling tubes condenser gas-liquid two-phase, and deoxidation method uses
Letting nitrogen in and deoxidizing vacuumizes simultaneously；
The simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus includes water tank, thermostat water bath, test piece slot, small mixed
Bed, vacuum pump, dosing mouth, dissolved oxygen meter, nitrogen cylinder, thermometer, electrode, lacing film, gas flowmeter, fluid flowmeter, liquid
Magnetic drive pump, gas magnetic drive pump, pH meter, conductivity meter, the water tank upper of square glass structure, which is open, fixes dissolved oxygen meter probe,
Probe is sealed by silica gel plug, and there are also opening insertion rubber stopper, rubber stoppers to punch two tubule of insertion on top, and a nitrogen is effective
Nitrogen is poured, there are also a vacuum-pumping tubes to connect a vacuum pump, in addition also sets up a dosing mouth, water tank upper two on rubber stopper
Side is separately connected two silicone tubes, and right side is steam outlet, and left side is processing water inlet, and water tank lower part has nitrogen tube nitrogen to go out
Mouthful, connection water outlet silicone tube, left side connect carbonated drink entrance silicone tube on the right side of lower part；Test piece slot top fixed thermometer, top are inserted
Enter rubber stopper, the rubber stopper that can fix test piece arranged at insertion electrode sealing among rubber stopper, test piece slot top, in water tank and test piece slot
Between connected with silicone tube, water tank is also connected with small-sized mixed bed, wherein mixed bed is used for one there are also measuring instrument pH meter and conductivity table
Group has tested post-processing Water in Water Tanks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962792.XA CN106596386B (en) | 2016-11-04 | 2016-11-04 | A kind of simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610962792.XA CN106596386B (en) | 2016-11-04 | 2016-11-04 | A kind of simulation air cooling tubes condenser metal vehicle repair major corrosion testing apparatus and method |
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| CN106596386A CN106596386A (en) | 2017-04-26 |
| CN106596386B true CN106596386B (en) | 2019-09-10 |
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| CN110542643B (en) * | 2018-06-06 | 2021-11-30 | 中昊清远(北京)科技有限公司 | Corrosion and aging test equipment for simulating marine multi-zone environment |
| CN109724911B (en) * | 2019-01-16 | 2024-05-17 | 克拉玛依市三达新技术股份有限公司 | Corrosion inhibitor evaluation integrated device and use method thereof |
| 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 |
| CN110361321B (en) * | 2019-07-29 | 2024-06-11 | 杭州意能电力技术有限公司 | Simulation test device for shutdown corrosion of thermodynamic equipment |
| CN110593866B (en) * | 2019-09-30 | 2022-09-13 | 中国石油集团川庆钻探工程有限公司 | Multi-scale intra-crack gas-liquid two-phase flow simulation and inter-crack interference evaluation testing device |
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| CN203432385U (en) * | 2013-06-26 | 2014-02-12 | 山东电力工程咨询院有限公司 | Closed multi-channel forced aeration-cooling air cooling system |
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