CN102507428B - Condensed fluid corrosion simulation test device in automobile exhaust system - Google Patents
Condensed fluid corrosion simulation test device in automobile exhaust system Download PDFInfo
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Abstract
The invention discloses a condensed fluid corrosion simulation test device in an automobile exhaust system, belonging to the technical field of corrosion and protection. The device comprises a reaction atmosphere control executive system, a reaction system, a condensed fluid recovery system and a tail gas treatment system. The reaction atmosphere control executive system is connected with the reaction system through a connecting pipe, the reaction system mainly comprises an electric thermal furnace, a reaction chamber, a control rod and a sample stage, the reaction chamber is arranged in the electric thermal furnace, the control rod is inserted into the reaction chamber from the top part of the reaction chamber, the sample stage is connected with the lower part of the control rod, and a cooling water jacket is arranged at the outer side above the reaction chamber; the back side of the reaction system is sequentially connected with the condensed fluid recovery system and the tail gas treatment system through a connecting pipe. The condensed fluid corrosion simulation test device simulates the corrosion environment at the low temperature end of the automobile exhaust system, solves the integrated simulation problem of multi-factor circulating action in the environment of the automobile exhaust system and provides an in situ electrochemical test method of the condensed fluid corrosion during a circulation test.
Description
Technical field
The invention belongs to corrosion and protection technical field, relate to the corrosion simulated of exhaust system, the corrosion simulated device of a kind of automobile exhaust system with material is particularly provided.
Background technology
In recent years, Domestic Automotive Industry is rapidly developed.According to Development Research Center of the State Council's prediction, to the year two thousand twenty Chinese car market demand year increasing by 12.2 %, aggregate demand will reach 2,043 ten thousand.And the about 24kg of import stainless steel for each vehicle exhaust system, accounted for the over half of automobile stainless steel application total amount, by 5,000,000 sales volumes of 2004, approximately 120,000 tons of stainless steel annual requirements for exhaust system, stainless steel is very tempting in the application prospect of Domestic Automotive Industry.
By with engine distance by near to order far away, the component parts of automobile exhaust system is followed successively by exhaust manifold, dummy pipe, flexible tubing, catalyst changer, centre pipe, main exhaust box and tip catheter.According to the difference of car type, what have is also provided with catalyst changer and secondary exhaust box in system.Current, answer lightweight, harsh requirement anti-corrosion and attractive in appearance, automobile exhaust system has been realized stainless steel substantially with material.
In the waste gas that motor car engine is discharged, contain the corrosive gass such as carbon monoxide, carbon dioxide, hydrocarbon, oxynitrides, oxygen sulfur compound.When vehicle telematic travels, its maximum temperature can reach 900 ℃, even the temperature in jet pipe exit also between 100 ~ 300 ℃, this temperature environment has high-temperature oxydation effect to exhaust system component; Closely travel, especially the automobile start-stop stopping time, exhaust system temperature is lower, and particularly, in sound suppressor, condensation can occur steam-laden high-temp waste gas, condenses to form to contain NH
4 +, CO
3 2-, SO
4 2-, Cl
-with organic acid corrosive liquids, exhaust system is produced to condensed fluid corrosive attack.Therefore, the condensed fluid corrosion failure under off-gas oxidizing ringing and to fester be the principal mode of the low-temperature end component failures such as exhaust system muffler.
Obviously, answer the demand for development of Hyundai Motor, exhaust system also will have the performance of cold-resistant lime set corrosion by the ability that stainless steel not only will possess resistance to high temperature oxidation.In order to be familiar with and to evaluate the military service performance of exhaust system low-temperature end material therefor, must set up test unit or the research method of suitable simulated exhaust system corrosion environment.Existing document has carried out correlative study report according to exhaust system low-temperature end feature, such as: half infusion test method(s) of muffle furnace heating and thermal insulation, half immersion and heated oxide cyclic test method (NSC) etc.Although existing these methods can be reproduced the oxidation of exhaust system low-temperature end (as sound suppressor) inner cryogenic, steam aggegation, the state such as moistening, but only considered the thermal oxidation of waste gas, and do not introduce the effect of waste gas sent off from automobiles, simultaneous oxidation test is separated carrying out with condensed fluid corrosion test, inconvenient operation.In addition, existing method all not yet realizes the electrochemical in-situ that in cyclic test process, condensed fluid corrodes and monitors to be familiar with corrosion mechanism.
Summary of the invention
The simulation test device that the object of this invention is to provide a kind of automobile exhaust system condensed fluid corrosion, solved the integrated problem of modelling of multifactor ringing in automobile exhaust system environment, and the electrochemical in-situ method of testing of condensed fluid corrosion in cyclic test process is provided.
The present invention, for the corrosion simulated test unit of condensed fluid of automobile exhaust system, comprising: reaction atmosphere is controlled executive system, reactive system, condensed fluid recovery system, exhaust treatment system.These systems are by connecting pipe successively airtight being connected.
Above-mentioned reaction atmosphere is controlled actuating unit and is comprised gas generating unit, preheating device, fluid drips feeder apparatus, liquid flowmeter, gas meter, the gas outlet on gas generating unit top is connected with gas meter by connecting pipe, gas meter is connected with porous flask side mouth by connecting pipe, porous flask is placed in electric jacket four, fluid drips feeder apparatus is connected with liquid flowmeter by connecting pipe, after the connecting pipe then picking out with another side openings of porous flask is connected, is jointly linked in the draft tube 11 of reactive system.Gas generating unit can be a gas generator or a plurality of gas generator, and the mixed gas of a kind of or its arbitrary proportion in the gases such as air, oxygen, sulphuric dioxide, carbon dioxide, nitrogen monoxide, chlorine, water vapor can be provided.Preheating device consists of electric jacket four and porous flask, for reacting gas shifts to an earlier date preheating, to guarantee to react the stable of internal ambience.Porous flask top is connected with porous flask charging hopper, Yi Rong, heat volatile pressed powder and can first be dissolved in liquid, then by porous flask charging hopper, add in the porous flask of preheating, liquid moment volatilization in porous flask is discharged after importing gas mixing preheating, if additive is also not easy volatilization, or low temperature volatilization effect is bad, needs to coordinate liquid Dropping feeder to test.
Above-mentioned reactive system comprises electrothermal furnace, reaction chamber, sample bench, control lever, temperature sensor 17, draft tube 11 and gas outlet, reaction chamber is placed in electrothermal furnace, lid is arranged at reaction chamber top, on lid, there is draft tube 11 and provide temperature sensor 17 and the opening of control lever access, temperature sensor 17 and control lever are linked in reaction chamber by these openings, control lever bottom connects sample bench, the opening part of draft tube 11 in reaction chamber connects osculum nozzle, reaction chamber top one side has gas outlet, so that gas is derived reaction chamber, reaction chamber upper outer also has cooling jacket, prevent that upper temp is too high, experiment is had a negative impact.Electrothermal furnace can be crucible furnace, tubular furnace or shaft furnace.Reaction chamber can be quartzy material, guarantees carrying out smoothly of suddenly cold and hot experiment, and the space of reaction chamber is larger, and while guaranteeing experiment, atmosphere is stable.Sample bench can be made by corrosion-and high-temp-resistant material, as pottery, quartz material, can be ring-type, groove shape, sheet etc., and concrete shape is determined according to specimen shape, size and requirement of experiment.Sample bench generally can hang or carry a plurality of samples.The function of control lever is auxiliary installation sample, and can carry out by control lever the high and low position of adjusting sample, to reach some requirement of experiment.The function of temperature sensor 17 is temperature of check and correction reaction chamber, to guarantee accurate temperature controlling.The adding of osculum nozzle can make the fluid drips added-time be together spray form in company with gas and enter reaction chamber, and then in vaporization rapidly in reaction chamber, form stable reaction atmosphere.In reaction chamber, the entrance of draft tube 11 outlets and gas outlet is placed in respectively top and the bottom of reaction chamber, can guarantee from gas outlet, to discharge after reaction atmosphere can be full of whole reaction chamber, having avoided reacting gas not contact sample just overflows from gas outlet, the function of draft tube 11 and gas outlet can be exchanged, and specifically according to experiment condition, determines.
Above-mentioned condensed fluid recovery system comprises reservoir, air intake opening 20, condensing reflux Guan Ershi mono-, gas outlet, air intake opening 20 is communicated with reaction chamber gas outlet is airtight by connecting pipe, condensing reflux Guan Ershi mono-is connected to reservoir top, and the gas after condensing reflux Guan Ershi mono-top has gas outlet for condensation reflow treatment is derived.The high-temperature gas of reaction chamber enters condensed fluid recovery system after discharging by connecting pipe, and the steam while flowing in connecting pipe in high-temperature gas is partial condensation, along pipeline, flows into reservoir, and uncondensed vapor is through condensing reflux Guan Ershi mono-further cooling for reflux.The condensed fluid reclaiming can be done experimental analysis, or does the related experiment such as condensed fluid immersion.
Above-mentioned exhaust treatment system form differs, and is to be generally equipped with to absorb the device that endangers gas solution in tail gas, comprising: suck-back device, draft tube 25, absorption bottle, back-off funnel, absorption liquid.Absorption liquid is housed in absorption bottle, and back-off funnel top is connected in draft tube 25, and bottom is immersed and absorbed under liquid level, and the degree of depth is adjustable, and suck-back device is connected between condensed fluid recovery system gas outlet and draft tube 25 by connecting pipe.The waste gas of discharging from condensed fluid recovery system imports in absorbent solution by connecting pipe, and the function of back-off infundibulate device is to increase gas-liquid contact area, and suck-back device is mainly to prevent that liquid suck-back from entering in condensed fluid, pollutes.Exhaust treatment system can be also that fuming cupboard or air bag are collected waste gas or other modes, no matter be which kind of form, pressure all can not be excessive, to guarantee the unimpeded and experiment safety of gas.
As the corrosion simulated test unit of the improved condensed fluid for automobile exhaust system of the present invention, be mainly to repack reactive system into reaction and electro-chemical test system.It comprises: reaction atmosphere is controlled executive system, reaction and electro-chemical test system, condensed fluid recovery system, exhaust treatment system.These systems are by connecting pipe successively airtight being connected.
Above-mentioned reaction atmosphere is controlled executive system and is comprised gas generating unit, preheating device, fluid drips feeder apparatus, liquid flowmeter, gas meter, the gas outlet on gas generating unit top is connected with gas meter by connecting pipe, gas meter is connected with porous flask side mouth by connecting pipe, porous flask is placed in electric jacket four, fluid drips feeder apparatus is connected with liquid flowmeter by connecting pipe, after the connecting pipe then picking out with another side openings of porous flask is connected, is jointly linked in the draft tube 11 of reactive system.Gas generating unit can be a gas generator or a plurality of gas generator, and the mixed gas of a kind of or its arbitrary proportion in the gases such as air, oxygen, sulphuric dioxide, carbon dioxide, nitrogen monoxide, chlorine, water vapor can be provided.Preheating device consists of electric jacket four and porous flask, for reacting gas shifts to an earlier date preheating, to guarantee to react the stable of internal ambience.Porous flask top is connected with porous flask charging hopper, Yi Rong, heat volatile pressed powder and can first be dissolved in liquid, then by porous flask charging hopper, add in the porous flask of preheating, liquid moment volatilization in porous flask is discharged after importing gas mixing preheating, if additive is also not easy volatilization, or low temperature volatilization effect is bad, needs to coordinate liquid Dropping feeder to test.
Above-mentioned reaction and electro-chemical test system, mainly partly consist of electric jacket 35 and electrolytic cell.Electrolytic cell is placed in electric jacket 35, to provide experiment temperature required, electrolytic cell lid is arranged at electrolytic cell top, there is air intake opening 29 in the electrolytic cell portion of covering, draft tube 11 is connected in electrolytic cell by air intake opening 29, sample and auxiliary electrode cover other opening by electrolytic cell and connect in electrolytic cell, there is opening electrolytic cell both sides, one side is exhausr port, exhausr port is connected with condensed fluid recovery system by gas outlet 13, and temperature sensor 32 and contrast electrode are contained in electrolytic cell opposite side opening part.Electrolytic cell can be quartzy material, or, resistance to suddenly cold and hot material high temperature resistant by other made, electrolytic cell part mainly consists of three-electrode electro Chemical test macro, sample is working electrode, auxiliary electrode and contrast electrode are Pt, and three electrodes are connected to the electrochemical workstation outside electrolytic cell by high temperature resistant material wire.High temperature resistant silicon ketone material approved sample for sample to be tested, reacting gas is imported in electrolytic cell by electrolytic cell top draft tube 11, and reacting gas is derived from exhausr port after fully reacting with sample.Experimental temperature is controlled by temperature sensor 32, for electrolytic cell is lowered the temperature rapidly, can after pyroprocessing, electrolytic cell be transferred in water bath with thermostatic control, to provide electro-chemical test temperature required.The required electrolytic solution of electro-chemical test is added by electrolytic cell exhausr port, pourable when test finishes.During electro-chemical test, at exhausr port, condensing reflux Guan Sanshi eight is installed, to reduce the impact of electrolytic solution evaporation on experiment.
Above-mentioned condensed fluid recovery system comprises reservoir, air intake opening 20, condensing reflux Guan Ershi mono-, gas outlet, the airtight connection of gas outlet 13 of air intake opening 20 and reaction chamber, condensing reflux Guan Ershi mono-is connected to reservoir top, and the gas after condensing reflux Guan Ershi mono-top has gas outlet for condensation reflow treatment is derived.The high-temperature gas of reaction chamber enters condensed fluid recovery system after discharging by connecting pipe, and the steam while flowing in connecting pipe in high-temperature gas is partial condensation, along pipeline, flows into reservoir, and uncondensed vapor is through condensing reflux Guan Ershi mono-further cooling for reflux.The condensed fluid reclaiming can be done experimental analysis, or does the related experiment such as condensed fluid immersion.
Above-mentioned exhaust treatment system form differs, and is to be generally equipped with to absorb the device that endangers gas solution in tail gas, comprising: suck-back device, draft tube 25, absorption bottle, back-off funnel, absorption liquid.Absorption liquid is housed in absorption bottle, and back-off funnel top is connected in draft tube 25, and bottom is immersed and absorbed under liquid level, and the degree of depth is adjustable, and suck-back device is connected between condensed fluid recovery system gas outlet and draft tube 25 by connecting pipe.The waste gas of discharging from condensed fluid recovery system imports in absorbent solution by connecting pipe, and the function of back-off infundibulate device is to increase gas-liquid contact area, and suck-back device is mainly to prevent that liquid suck-back from entering in condensed fluid, pollutes.Exhaust treatment system can be also that fuming cupboard or air bag are collected waste gas or other modes, no matter be which kind of form, pressure all can not be excessive, to guarantee the unimpeded and experiment safety of gas.
So just realized the electrochemical in-situ test of reaction sample, solve sample and will repeatedly take out numerous and diverse operation of test, shortened experimental period, prevented pollution and the scuffing of sample in operating process, electrolytic solution is provided by the condensed fluid that reacts collection, has reproduced the corrosion environment of true exhaust system.
In sum, the present invention has the following advantages:
1, the thermal oxidation and the condensed fluid corrosion experiment that integrate waste gas, solved the integrated problem of modelling of multifactor ringing in automobile exhaust system environment, the corrosion environment that the adjusting by temperature can real simulation exhaust system low-temperature end.
2, introduce corrosion potential that electro-chemical test system can in-situ test corrosion sample, impedance spectrum etc., shortened experimental period, can realize the at-once monitor to corrosion sample, use for electrochemical tests electrolytic solution is provided by the condensed fluid that reacts collection, guarantees to reproduce the real corrosion environment of exhaust system.
3, realized the corrosion environment that passes into mixed gas simulated automotive tail gas, the global design of system has guaranteed the accurate control of the stable and temperature of atmosphere in whole course of reaction.
4, this simulation test device is simple to operate, can realize the analysis of experiments from single factor to multifactor impact.
Accompanying drawing explanation
Fig. 1 is the system construction drawing of the first embodiment of the simulation test device of automobile exhaust system condensed fluid of the present invention corrosion.Wherein, reaction atmosphere is controlled executive system and is comprised: gas generating unit 1, connecting pipe 2, gas meter 3, electric jacket 44, porous flask 5, porous flask charging hopper 6, fluid drips feeder apparatus 7, liquid flowmeter 8, reactive system comprises: electrothermal furnace 9, reaction chamber 10, draft tube 11, osculum nozzle 12, gas outlet 13, sample bench 14, sample 15, control lever 16, temperature sensor 17, cooling jacket 18, reaction chamber lid 39, condensed fluid recovery system comprises: reservoir 19, air intake opening 20, condensing reflux Guan Ershi 1, gas outlet 22, exhaust treatment system comprises: suck-back device 23, absorption bottle 24, draft tube 25, back-off funnel 26, absorption liquid 27.
Fig. 2 is the system construction drawing of the second embodiment of the simulation test device of automobile exhaust system condensed fluid of the present invention corrosion, and Fig. 3 is independent reaction and electro-chemical test system.Wherein, electrolytic cell partly comprises: air intake opening 29, electrolytic cell lid 30, contrast electrode 31, temperature sensor 32, electrolytic cell 33, sample 34, auxiliary electrode 36, exhausr port 37, condensing reflux Guan Sanshi 8 38, also have gauge tap 28, electric jacket 35 in addition.
Embodiment
Below by embodiment, the present invention is described in detail.
embodiment mono-
Referring to Fig. 1, the invention provides a kind of corrosion simulated device of condensed fluid of automobile exhaust system, solved the integrated problem of modelling of multifactor ringing in automobile exhaust system environment, and the electrochemical in-situ method of testing of condensed fluid corrosion in cyclic test process is provided.Apparatus of the present invention mainly comprise: reaction atmosphere is controlled executive system, reactive system, condensed fluid recovery system, exhaust treatment system.These systems are by connecting pipe airtight connection successively.
Above-mentioned reaction atmosphere is controlled actuating unit and is comprised gas generating unit 1, preheating device, fluid drips feeder apparatus 7, liquid flowmeter 8, gas meter 3, the gas outlet on gas generating unit 1 top is connected with gas meter 3 by connecting pipe 2, gas meter 3 is connected with porous flask side mouth by connecting pipe, porous flask is placed in electric jacket 44, fluid drips feeder apparatus 7 is connected with liquid flowmeter 8 by connecting pipe, after the connecting pipe then picking out with porous flask 5 another side openings is connected, is jointly linked in the draft tube 11 of reactive system.Preheating device consists of electric jacket 44 and porous flask 5, and porous flask 5 tops are connected with porous flask charging hopper 6.Above-mentioned reactive system comprises electrothermal furnace 9, reaction chamber 10, sample bench 14, control lever 16, temperature sensor 17, draft tube 11 and gas outlet 13, reaction chamber 10 is placed in electrothermal furnace 9, lid is arranged at reaction chamber 10 tops, on lid, there is draft tube 11 and provide temperature sensor 17 and the opening of control lever 16 accesses, temperature sensor 17 and control lever 16 are linked in reaction chamber 10 by these openings, control lever 16 bottoms connect sample bench 14, the opening part of draft tube 11 in reaction chamber 10 connects osculum nozzle 12, reaction chamber 10 top one sides have gas outlet 13, reaction chamber 10 upper outer also have cooling jacket 18.Above-mentioned condensed fluid recovery system comprises reservoir 19, air intake opening 20, condensing reflux Guan Ershi 1, gas outlet 22, the airtight connection of gas outlet 13 of air intake opening 20 and reaction chamber, condensing reflux Guan Ershi 1 is connected to reservoir 19 tops, and gas outlet 22 is arranged at condensing reflux Guan Ershi mono-21 tops.Above-mentioned exhaust treatment system comprises: suck-back device 23, draft tube 25, absorption bottle 24, back-off funnel 26, absorption liquid 27.Absorption liquid 27 is housed in absorption bottle 24, back-off funnel 26 tops are connected in draft tube 25, bottom is immersed and is absorbed under liquid level, and the degree of depth is adjustable, and suck-back device 23 is connected between condensed fluid recovery system gas outlet 22 and draft tube 25 by connecting pipe.
In order to explore in SCR system, because of adding the stainless corrosion impact of motor vehicle exhaustion system of urea, adopted apparatus of the present invention to test.Selecting existing heavy truck exhaust system to add urea system is experiment material with material 304 stainless steels, arranges and adds urea and do not add two groups of contrast experiments of urea.
Experiment is added distilled water preparation without urea dropping liquid with ammonium sulfite and sulphurous acid, controls H in solution
2o and SO
2mole proportioning be certain value, and guarantee pH=3 ~ 5 of the condensed fluid collect after reaction chamber, carry out the corrosive environment of simulated exhaust system.On the basis of not adding urea dropping liquid, add urea, making the content of solution urea is 1 ~ 3wt%, is and adds urea dropping liquid composition.Condensed fluid adopts the preparation of AKsteel standard, with dilute sulfuric acid, regulates pH=3 ~ 5.
Experiment is used air as gas source, it is 30 ~ 120ml/min that adjusting gas flow meter 3 makes the flow velocity of gas, regulator solution flowmeter body 8, the speed that control dropping solution enters reaction chamber 10 is 5 ~ 15ml/h, after mixing with dropping solution after gas heats in the preheating device of 300 ℃, by osculum nozzle 12, enter reaction chamber 10, the fine drop of ejection, under the high temperature action of 400 ℃, is vaporized rapidly, forms the ambiance of Reality simulation gas outlet SCR system.
Sample is oxidized after 2h in 400 ℃ of reaction chambers 10, close gas and fluid supply, and open reaction chamber lid 39, with control lever 16, take out sample 15, adopt the mode of partly soaking to soak 30min(60 ~ 80 ℃ water bath with thermostatic control in the condensed fluid of preparation), so far be a circulation, during can carry out electro-chemical test, so circulation experiment is 50 times.
embodiment bis-
The present embodiment is substantially the same manner as Example 1, special feature is that reaction atmosphere is different and reactive system is repacked into and take reaction and the electro-chemical test system that electrolytic cell is main body, to realize the integrated problem of modelling of multifactor ringing in automobile exhaust system environment, and provide the electrochemical in-situ method of testing that in cyclic test process, condensed fluid corrodes.
Referring to Fig. 2, Fig. 3, gas generating unit 1 consists of a plurality of gas generators, to realize single factor or multifactor gas effect simulation test.Reaction and electro-chemical test system mainly partly consist of electric jacket 35 and electrolytic cell.Electrolytic cell 33 is placed in electric jacket 35, electrolytic cell lid 30 is arranged at electrolytic cell 33 tops, electrolytic cell covers 30 tops air intake opening 29, draft tube 11 is connected in electrolytic cell 33 by air intake opening 29, sample 34 and auxiliary electrode 36 cover other opening on 30 by electrolytic cell and connect in electrolytic cell 33, there is opening electrolytic cell 33 both sides, one side is exhausr port 37, exhausr port 37 is connected with condensed fluid recovery system by gas outlet 13, and temperature sensor 32 and contrast electrode 31 are contained in electrolytic cell 33 opposite side opening parts.Electrolytic cell 33 is made by quartzy material, and in the formation of three-electrode electro Chemical test macro, sample 34 is working electrode, and auxiliary electrode 36 and contrast electrode 31 are Pt, and three electrodes are connected to the electrochemical workstation outside electrolytic cell 33 by high temperature resistant material wire.
Vehicle exhaust is the mixed gas of carbon monoxide, carbon dioxide, hydrocarbon, oxynitrides, lead and oxygen sulfur compound etc., for the corrosion impact of one or more compositions to exhaust system material in research vehicle exhaust, as study the effect of sulfur dioxide in tail gas and carbon dioxide, can control respectively by gas meter 3 flow of sulphuric dioxide and carbon dioxide, remaining gas is normally added, water vapor can or directly drip distilled water by fluid drips feeder apparatus 7 by porous flask charging hopper 6 and realize, to form the reaction atmosphere of simulated automotive tail gas.
By high temperature resistant silicon ketone material approved sample for sample to be tested, test.Reacting gas is imported in electrolytic cell 33 by electrolytic cell top draft tube 11, after reacting gas fully reacts with sample 34, from exhausr port 37, derives.Sample to be tested 34 is after 400 ℃ of high-temperature oxydation 2h, and closing control switch 28, and rapidly electrolytic cell 33 being shifted out from electric jacket 35, after temperature is reduced to room temperature, is placed in 60 ~ 80 ℃ of waters bath with thermostatic control by electrolytic cell 33.Exhausr port 37 place's connecting pipes are opened, the condensed fluid of getting a certain amount of collection adds electrolytic cell 33 from exhausr port 37, regulate three electrode positions, make it meet electro-chemical test requirement, at exhausr port 37, condensing reflux Guan Sanshi 8 38 is installed, to reduce the impact of electrolytic solution evaporation on experiment, then in the immersion test of 30min, sample is carried out to electrochemical in-situ test analysis.After electro-chemical test finishes, condensed fluid is poured out from electrolytic cell 33, to guarantee carrying out smoothly of next circulation experiment.
Claims (7)
1. an analogue experiment installation for automobile exhaust system condensed fluid corrosion, is characterized in that this device comprises: reaction atmosphere is controlled executive system, reactive system, and condensed fluid recovery system, exhaust treatment system, these systems are by connecting pipe successively airtight being connected, above-mentioned reaction atmosphere is controlled executive system and is comprised gas generating unit (1), preheating device, fluid drips feeder apparatus (7), liquid flowmeter (8), gas meter (3), the gas outlet on gas generating unit (1) top is connected with gas meter (3) by connecting pipe (2), gas meter (3) is connected with porous flask (5) side mouth by connecting pipe, porous flask (5) is placed in electric jacket four (4), fluid drips feeder apparatus (7) is connected with liquid flowmeter (8) by connecting pipe, then after being connected, the connecting pipe picking out with another side mouth of porous flask (5) is jointly linked in the draft tube ten one (11) of reactive system, preheating device consists of electric jacket four (4) and porous flask (5), and porous flask (5) top is connected with porous flask charging hopper (6), above-mentioned reactive system comprises electrothermal furnace (9), reaction chamber (10), sample bench (14), control lever (16), temperature sensor ten seven (17), draft tube ten one (11) and gas outlet (13), reaction chamber (10) is placed in electrothermal furnace (9), lid is arranged at reaction chamber (10) top, on lid, there is draft tube ten one (11) and provide temperature sensor ten seven (17) and the opening of control lever (16) access, temperature sensor ten seven (17) and control lever (16) are linked in reaction chamber (10) by opening, control lever (16) bottom connects sample bench (14), the opening part of draft tube ten one (11) in reaction chamber (10) connects osculum nozzle (12), reaction chamber (10) top one side has gas outlet (13), reaction chamber (10) upper outer also has cooling jacket (18), above-mentioned condensed fluid recovery system comprises reservoir (19), air intake opening 20 (20), condensing reflux Guan Ershi mono-(21), gas outlet (22), the airtight connection of gas outlet (13) of air intake opening 20 (20) and reaction chamber, condensing reflux Guan Ershi mono-(21) is connected to reservoir (19) top, and gas outlet (22) is arranged at condensing reflux Guan Ershi mono-(21) top, above-mentioned exhaust treatment system comprises: suck-back device (23), draft tube 25 (25), absorption bottle (24), back-off funnel (26), absorption liquid (27), absorption liquid (27) is housed in absorption bottle (24), back-off funnel (26) top is connected in draft tube 25 (25), bottom is immersed and is absorbed under liquid level, the degree of depth is adjustable, and suck-back device (23) is connected between condensed fluid recovery system gas outlet (22) and draft tube 25 (25) by connecting pipe.
2. the analogue experiment installation of automobile exhaust system condensed fluid corrosion according to claim 1, is characterized in that, gas generating unit (1) consists of a plurality of gas generators.
3. the analogue experiment installation of automobile exhaust system condensed fluid corrosion according to claim 1, is characterized in that, porous flask (5) and reaction chamber (10) are quartzy material.
4. the analogue experiment installation of an improved automobile exhaust system condensed fluid corrosion, it is characterized in that this device comprises: reaction atmosphere is controlled executive system, reaction and electro-chemical test system, condensed fluid recovery system, exhaust treatment system, these systems are by connecting pipe successively airtight being connected, above-mentioned reaction atmosphere is controlled executive system and is comprised gas generating unit (1), preheating device, fluid drips feeder apparatus (7), liquid flowmeter (8), gas meter (3), the gas outlet on gas generating unit (1) top is connected with gas meter (3) by connecting pipe (2), gas meter (3) is connected with porous flask (5) side mouth by connecting pipe, porous flask (5) is placed in electric jacket four (4), fluid drips feeder apparatus (7) is connected with liquid flowmeter (8) by connecting pipe, then after being connected, the connecting pipe picking out with another side mouth of porous flask (5) is jointly linked in the draft tube ten one (11) of reactive system, preheating device consists of electric jacket four (4) and porous flask (5), and porous flask (5) top is connected with porous flask charging hopper (6), above-mentioned reaction and electro-chemical test system mainly partly consist of electric jacket 35 (35) and electrolytic cell, electrolytic cell (33) is placed in electric jacket 35 (35), electrolytic cell lid (30) is arranged at electrolytic cell (33) top, air intake opening 29 (29) is arranged at electrolytic cell lid (30) top, draft tube ten one (11) is connected in electrolytic cell (33) by air intake opening 29 (29), sample (34) and auxiliary electrode (36) cover (30) upper other opening by electrolytic cell and connect in electrolytic cell (33), there is opening electrolytic cell (33) both sides, one side is exhausr port (37), exhausr port (37) is connected with condensed fluid recovery system by gas outlet (13), temperature sensor 32 (32) and contrast electrode (31) are contained in electrolytic cell (33) opposite side opening part, electrolytic cell (33) is made by quartzy material, sample in the formation of three-electrode electro Chemical test macro (34) is working electrode, auxiliary electrode (36) and contrast electrode (31) are Pt, and three electrodes are connected to the outer electrochemical workstation of electrolytic cell (33) by high temperature resistant material wire, above-mentioned condensed fluid recovery system comprises reservoir (19), air intake opening 20 (20), condensing reflux Guan Ershi mono-(21), gas outlet (22), the airtight connection of gas outlet (13) of air intake opening 20 (20) and reaction chamber, condensing reflux Guan Ershi mono-(21) is connected to reservoir (19) top, and gas outlet (22) is arranged at condensing reflux Guan Ershi mono-(21) top, above-mentioned exhaust treatment system comprises: suck-back device (23), draft tube 25 (25), absorption bottle (24), back-off funnel (26), absorption liquid (27), absorption liquid (27) is housed in absorption bottle (24), back-off funnel (26) top is connected in draft tube 25 (25), bottom is immersed and is absorbed under liquid level, the degree of depth is adjustable, and suck-back device (23) is connected between condensed fluid recovery system gas outlet (22) and draft tube 25 (25) by connecting pipe.
5. the analogue experiment installation that a kind of improved automobile exhaust system condensed fluid according to claim 4 corrodes, it is characterized in that, high temperature resistant silicon ketone material approved sample for sample (34), reacting gas is imported in electrolytic cell (33) by electrolytic cell top draft tube ten one (11), after reacting gas fully reacts with sample (34), from exhausr port (37), derives; Electrolytic cell (33) adopts water bath with thermostatic control temperature control, during electro-chemical test, at exhausr port (37), condensing reflux Guan Sanshi eight (38) has been installed.
6. the analogue experiment installation of a kind of improved automobile exhaust system condensed fluid corrosion according to claim 4, is characterized in that, gas generating unit (1) consists of a plurality of gas generators.
7. the analogue experiment installation of a kind of improved automobile exhaust system condensed fluid corrosion according to claim 4, is characterized in that, porous flask (5) is quartzy material.
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| CN103592215A (en) * | 2013-10-23 | 2014-02-19 | 中国石油化工股份有限公司 | Corrosion method of environment containing volatile substances |
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| ES2586287B2 (en) * | 2016-07-11 | 2017-01-26 | Universidad Complutense De Madrid | Installation and procedure for testing components and melts subjected to temperature and pressure cycles in a reactor cooled and agitated by three-dimensional rotor |
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| CN113848174B (en) * | 2021-10-13 | 2023-11-10 | 中国核动力研究设计院 | Electrochemical corrosion test device under boiling and strong corrosive solution environment and application thereof |
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| CN101520402A (en) * | 2009-02-24 | 2009-09-02 | 上海大学 | Experimental facility for testing electrochemical signals of various materials in high-temperature high-pressure environment |
| CN101929945A (en) * | 2009-08-21 | 2010-12-29 | 昆明理工大学 | Low-temperature dew point corrosion experiment method for phosphorus in yellow phosphorus tail gas on boiler material and device thereof |
| CN201885954U (en) * | 2010-10-27 | 2011-06-29 | 中国石油化工股份有限公司 | High-temperature and high-pressure gas-liquid two-phase corrosion simulation experimental device |
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