CN101988179A - Gas-phase passivation system for petrochemical device - Google Patents
Gas-phase passivation system for petrochemical device Download PDFInfo
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- CN101988179A CN101988179A CN2010105212624A CN201010521262A CN101988179A CN 101988179 A CN101988179 A CN 101988179A CN 2010105212624 A CN2010105212624 A CN 2010105212624A CN 201010521262 A CN201010521262 A CN 201010521262A CN 101988179 A CN101988179 A CN 101988179A
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Abstract
The invention discloses a gas-phase passivation system for a petrochemical device. The gas-phase passivation system comprises a gas-phase passivation device, a tail gas treatment device and a data analysis device, wherein the tail gas treatment device is connected with the gas-phase passivation device and is used for treating harmful gases generated in a passivation process; the tail gas treatment device further comprises a lye tank in which 10 percent sodium hydroxide solution is accommodated, a tail gas valve and an exhausting valve; the data analysis device is connected with the gas-phase passivation device and is used for detecting data of combustible gases before gas-phase passivation and linearly detecting the concentration of sulfur dioxide (SO2) generated by passivation in a gas-phase passivation process; and the data analysis device further comprises a gas drying apparatus, a gas chromatograph, a metering machine, an air inlet monitoring valve and an air outlet monitoring valve. By the passivation system, waste gases are easy to treat, and the waste gases generated by gas-phase passivation can meet the discharge standard after being treated simply.
Description
Technical field
The present invention relates to a kind of treatment system technical field of metal product, the gaseous passivation system of particularly a kind of petrochemical equipment metallic surface.
Background technology
The metallic surface is converted into and is difficult for oxidized state, and the method that delays corrosion of metal speed is called passivation.If metal is because the corrosion product that the effect of medium generates has fine and close structure, form thin film (invisible often), closely covered metallic surface, then changed the metallic surface state, the electropotential that makes metal is greatly to positive dirction transition, and becomes anti-corrosion passive state.Standard potential is-0.44V during as Fe → Fe++, jumps to after the passivation+0.5～1V, and demonstrates corrosion resistant precious metal performance, and this layer film just is passive film.
The passivation of metal also may be spontaneous process (as generating the insoluble compound of one deck, i.e. oxide film at metallic surface).Industrial be metal to be carried out Passivation Treatment with passivator (mainly being oxygenant), form layer protecting film.
Iron, aluminium are at rare HNO
3Or rare H
2SO
4In can very fast dissolving, but at dense HNO
3Or dense H
2SO
4Middle dissolution phenomena has almost completely stopped, and carbon steel is easy to get rusty usually, if add an amount of Ni, Cr in steel, has just become stainless steel.Metal or alloy is subjected to some factor affecting, and the obvious enhanced phenomenon of chemical stability is called passivation.By the caused metal passivation phenomenon of some passivator (pharmaceutical chemicals), be called chemical passivation.As dense HNO
3, dense H
2SO
4, HClO
3, K
2Cr
2O
7, KMnO
4All can make metal passivation in oxygenant.Behind the metal passivation, its electrode potential moves to positive dirction, makes it lose original characteristic, as passivation iron in mantoquita, copper can not be displaced.In addition, also can make metal passivation, as Fe is placed H with electrochemical method
2SO
4As anode, make anodic polarization with impressed current in the solution, adopt certain instrument that ferroelectric position is raise to a certain degree, Fe is with regard to passivation.By the metal passivation phenomenon that anodic polarization causes, be anode passivation or electrochemical passivation.
Iron sulfuret is that sulphur in oil and the derived prods thereof is to the corrosion product of petrochemical equipment, often take place in the petrochemical equipment maintenance process, so must carry out the passivation or the clean of Iron sulfuret before the petrochemical equipment maintenance because the Iron sulfuret oxidation causes spontaneous combustion or explosion hazard.
At present, all adopt the method for liquid phase passivation, be about to that liquid phase passivator circulates and then the abundant reaction of realization and Iron sulfuret in device, thereby reach the purpose of preventing the Iron sulfuret oxidation and spontaneous combustion at the treatment process of Iron sulfuret in the petrochemical equipment.
Metal is in passive state and can protects metal to prevent corrosion, and passivation phenomenon is that metallographic phase is mutually caused with solution, and is still caused by surface phenomenon.Someone once studied the influence of mechanicalness scraped finish to the metal that is in passive state.Experiment shows, continuous scraped finish metallic surface during measurement, and then the electromotive force of metal acutely moves to negative direction, and just the finishing metal surface can cause the activation that is in passive metal.Prove that promptly passivation phenomenon is a kind of surface phenomenon.It is under certain condition, changes on the interface that metal and medium are in contact with one another.When electrochemical passivation was anodic polarization, the current potential of metal changed and form metal oxide or salt on electrode surface.These materials closely cover become passive film on the metallic surface and cause metal passivation, chemical passivation then be the picture dense HNO
3Directly form oxide film in oxygenant, or the metal that adds easy passivation causes as Cr, Ni etc. to the effect of metal and on the surface.During chemical passivation, not so the oxidant concentration of adding also should not only can not cause passive state less than a certain threshold value, will cause that anti-metal dissolves faster.
Existing liquid phase passivating technique defective: (1) consumption is big.The passivator consumption of a conventional distillation tower does not wait from several tons to tens tons, and cost is higher.(2) channeling is serious.Because the unhomogeneity of dirt layer causes liquid serious in its surperficial channeling in the device, occurs the dead angle easily.(3) liquid waste disposal difficulty, the Mn that contains in the existing passivator
2+, Cr
2+Can cause severe contamination etc. heavy metal ion to environment, contain Cl in the passivator that also has
-Then stainless steel is formed stress cracking.(4) treatment time is long.Existing liquid phase passivating technique passivation time is generally about 24 hours, and the maintenance duration of complete assembly is shorter, causes overhauling the hysteresis of other work.
Summary of the invention
Technical problem to be solved by this invention is, a kind of petrochemical equipment gaseous passivation system is provided, and can effectively overcome the following defective that the liquid phase passivation exists in the prior art: (1) consumption is big, the cost height.Gaseous passivation mainly uses oxygen-rich air, and is easy to use, and cost is lower.(2) channeling is serious.Owing to be gas phase action, therefore there are not channeling and dead angle.(3) liquid waste disposal difficulty.Waste gas behind the gaseous passivation can reach emission standard after simple process.(4) treatment time is long.Gaseous passivation can carry out in steaming tower (light constituent in the steaming out tower) middle and later periods, and passivation time reduces.
For solving the problems of the technologies described above, the invention provides a kind of Iron sulfuret gaseous passivation method, comprise the step of the step of monitoring, the step of supplying gas and passivation.
Described method may further include the step of sealing and the step of discharging.
The step of described passivation is preferably: carry oxygen-rich air by steam and enter the gaseous passivation of implementing Iron sulfuret in the sealed vessel.
Described steam can be water vapor, and the pressure of described steam is 0.1～0.9Mpa.
Described oxygen-rich air can be 21%～50% air for the volume percent oxygen level.
Described steam can be water vapor, and the pressure of described steam is preferably 0.3～0.4Mpa; Described oxygen-rich air is preferably 21%～35% air for the volume percent oxygen level.
The step of described discharging can for: start vapour generator, produce water vapor, open the steam valve 18 that directly links to each other with steam-flow meter, open supply gas valve 20 and gathering tank valve 22 more successively, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower.
The step of described passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration; SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 6～18 hours, and SO
2Volumetric concentration reduce to 0.002%～0.08%, and when no longer changing within 30～80 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
The step of described passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 160～240 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, when treating that temperature is reduced to 85～95 ℃, continue passivation reaction again.
Described method preferably further comprises:
Sealing; To treat that passivating material is positioned in the simulation packing tower of sealing;
Water inlet; Water is entered vapour generator by the Inlet and outlet water valve;
Discharging; Start vapour generator and produce water vapor, open the steam valve 18 that links to each other with steam-flow meter, open supply gas valve 20 and gathering tank valve 22 more successively, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.25～0.45Mpa that adjusting oxygen air intake valve 17, oxygen valve 19 keep vapor pressures, and steam flow is 0.8～1.2m
3/ h, compression oxygen-rich air pressure 0.25～0.45Mpa, flow is 200～600ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 6～16 hours, and SO
2Volumetric concentration reduce to 0.003%～0.09%, and when no longer changing within 25～85 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
For solving the problems of the technologies described above, the present invention also provides a kind of petrochemical equipment gaseous passivation method, comprises the step of supplying gas and the step of passivation.
Described method may further include the step of monitoring and the step of discharging.
The step of described passivation can for: carry oxygen-rich air by steam and enter in the sealed vessel gaseous passivation of implementing Iron sulfuret.
Described steam is preferably water vapor, and the pressure of described steam is 0.2～0.8Mpa.
Described oxygen-rich air is preferably 22%～55% air for the volume percent oxygen level.
Described steam can be water vapor, and the pressure of described steam is 0.25～0.45Mpa; Described oxygen-rich air is 23%～36% air for the volume percent oxygen level.
The step of described discharging is preferably: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
The step of described passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 7～19 hours, and SO
2Volumetric concentration reduce to 0.001%～0.09%, and when no longer changing within 30～60 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
The step of described passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 180～240 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 70～100 ℃ passivation reaction.
Described method may further include:
Water inlet; Tap water is sent into water softener, by water softener tap water is softened, the tap water after softening enters vapour generator by the Inlet and outlet water valve;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process; The medium of packing tower is a crude oil, and its effect is the active sulphur and 20 in the crude oil
#The reaction of carbon steel filler forms Iron sulfuret.
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.3～0.4Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.9～1.1m
3/ h, compression oxygen-rich air pressure 0.2～0.5Mpa, flow is 150～550ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 8～14 hours, and SO
2Volumetric concentration reduce to 0.001%～0.07%, and when no longer changing within 30～80 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
For solving the problems of the technologies described above, the present invention provides a kind of petrochemical equipment gaseous passivation system again, comprises gaseous passivation device, exhaust gas processing device and data analysis set-up.
Described exhaust gas processing device can link to each other with described gaseous passivation device, is used for handling the obnoxious flavour that passivating process produces.
Described exhaust gas processing device may further include: the lye vat, tail gas valve 23 and the drain tap 24 that contain 10% sodium hydroxide solution.
Described data analysis set-up,
Can link to each other with described gaseous passivation device, be used for the preceding inflammable gas Data Detection of gaseous passivation;
And, in the gaseous passivation process, to the SO of passivation generation
2The linearity test of concentration.
Described data analysis set-up may further include: gas flow dryer, gas chromatograph, weigher, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger.
Described gaseous passivation device can link to each other with data analysis set-up with described exhaust gas processing device respectively, is used for petrochemical equipment is carried out gaseous passivation.
Described gaseous passivation device preferably further comprises: steam supply part, oxygen supply part and sealing element.
Described steam supply part may further include: water softener, vapour generator, steam-flow meter and valve.
Described oxygen supply part may further include: compression oxygen-rich air bottle, gas meter, oxygen air intake valve 17 and oxygen valve 19.
Described sealing element may further include: packing tower, give vent to anger valve 23 and gathering tank valve 22.
Described gaseous passivation system in use, the step of discharging can for: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
Described gaseous passivation system in use, the step of passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～15 hours, and SO
2Volumetric concentration reduce to 0.005%～0.01%, and when no longer changing within 35～55 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Described gaseous passivation system in use, the step of passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 190～270 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 80～110 ℃ passivation reaction.
Described gaseous passivation system method in use can comprise:
Water inlet; Water is sent into water softener, by water softener water is softened, the water after softening enters vapour generator;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.2～0.5Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.8～1.2m
3/ h, compression oxygen-rich air pressure 0.2～0.4Mpa, flow is 120～580ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 9～12 hours, and SO
2Volumetric concentration reduce to 0.002%～0.1%, and when no longer changing within 40～70 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
For solving the problems of the technologies described above, the present invention provides a kind of Iron sulfuret gaseous passivation device again, comprises steam supply part, oxygen supply part and sealing element.
Described gaseous passivation device can link to each other with data analysis set-up with exhaust gas processing device respectively, is used for petrochemical equipment is carried out gaseous passivation.
Described steam supply part may further include: water softener, vapour generator, steam-flow meter and valve.
Described oxygen supply part may further include: compression oxygen-rich air bottle, gas meter, oxygen air intake valve 17 and oxygen valve 19.
Described sealing element may further include: packing tower, give vent to anger valve 23 and gathering tank valve 22.
Described Iron sulfuret gaseous passivation device in use, the step of discharging can for: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
Described Iron sulfuret gaseous passivation device in use, the step of passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～15 hours, and SO
2Volumetric concentration reduce to 0.005%～0.01%, and when no longer changing within 35～55 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Described Iron sulfuret gaseous passivation device in use, the step of passivation can further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 190～270 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 80～110 ℃ passivation reaction.The medium of packing tower is a crude oil, and its effect is the active sulphur and 20 in the crude oil
#The reaction of carbon steel filler forms Iron sulfuret.
Described Iron sulfuret gaseous passivation device method in use can may further comprise the steps:
Water inlet; Tap water is sent into water softener, by water softener tap water is softened, the tap water after softening enters vapour generator;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process.
Described Iron sulfuret gaseous passivation device method in use can further include following steps:
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.3～0.5Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.8～1.0m
3/ h, compression oxygen-rich air pressure 0.25～0.45Mpa, flow is 110～580ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～14 hours, and SO
2Volumetric concentration reduce to 0.0015%～0.095%, and when no longer changing within 40～100 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Liquid phase passivating method compared to existing technology, the present invention has following beneficial technical effects:
(1) cost is low, implements simple.Gaseous passivation mainly uses oxygen-rich air, and is easy to use, and cost is lower.(2) passivation is even, does not have channeling.Owing to be gas phase action, therefore there are not channeling and dead angle.(3) off gas treatment is easy.Waste gas behind the gaseous passivation can reach emission standard after simple process.(4) treatment time is short.Gaseous passivation can carry out in steaming tower (light constituent in the steaming out tower) middle and later periods, and passivation time has reduced about 16 hours.
Description of drawings
Fig. 1 is the described simulation packing tower of an embodiment of the invention gaseous passivation setting drawing;
Fig. 2 is SO in the passivation tail gas in the described gaseous passivation engineering of the embodiment of the invention
2Concentration graph of a relation over time;
Fig. 3 is the photo of tower wall before the described gaseous passivation of the embodiment of the invention;
Fig. 4 is the photo of tower wall behind the described gaseous passivation of the embodiment of the invention.
Embodiment
Gaseous passivation is with water vapor to be method that carrier utilize oxidizing gas controlled oxidation by the generation of its inner Iron sulfuret generation spontaneous combustion and explosion hazard to Iron sulfuret enforcement for the people that prevents opening unit before petrochemical equipment maintenance.
The gaseous passivation method of Iron sulfuret in the petrochemical equipment of the present invention, be to steam the tower middle and later periods, (0.3～0.4Mpa) oxygen-rich air that carries certain oxygen level (21%～35%) enters the gaseous passivation of implementing Iron sulfuret in the distillation tower by low-pressure steam, the heat that passivation discharged is absorbed by the bigger steam of thermal capacitance can not cause gathering of heat in the tower, and the part sulfur dioxide gas that passivation generated carries out tower by steam after the ammoniacal liquor condensation can directly be discharged after absorbing.
As shown in Figure 1, be the described simulation packing tower of embodiment of the invention gaseous passivation setting drawing, wherein each Reference numeral is:
1, packing tower; 2, compression oxygen-rich air bottle; 3, gas meter; 4, water softener; 5, vapour generator; 6, steam-flow meter; 7, tensimeter; 8,20
#The carbon steel filler; 9,10,11, thermopair (do not draw in the accompanying drawing, actual be connected) with weigher 16; 12, steam distributor; 13, lye vat (containing 10% sodium hydroxide solution); 14, gas flow dryer (containing vitriol oil siccative); 15, on-line gas chromatography; 16, computer; 17～27, valve;
17～27 valve is respectively:
17, oxygen air intake valve; 18, steam valve; 19, oxygen valve; 20, the valve of supplying gas on; 21, emptying valve; 22, gathering tank valve; 23, the valve of giving vent to anger; 24, tail gas valve; 25, monitoring air intake valve; 26, monitor the valve of giving vent to anger; 27, the valve of supplying gas down.
A specific embodiments of the present invention is:
1. open water softener 4 Inlet and outlet water valves and start vapour generator 5, open valve 18,20 and 22, utilize steam will simulate the gathering tank that the medium force feed connects to valve 22 in the packing tower.
2. valve-off 20,22 after discharging finishes, Open valve 23,24 will steam the tower steam tail gas and be disposed to and exhaust gas processing device 13, and monitor inflammable gas content in discharge process.
3. when inflammable gas content in the packing tower is not in its limits of explosion scope, open valve 17,19, and keep vapor pressure 0.3～0.4Mpa, flow is counted 1m
3About/h, compression oxygen-rich air pressure 0.3～0.4Mpa, flow is about 400ml/h.Open valve 24,25,26,27 successively, start the SO of online gas-chromatography monitoring then
2The concentration (see figure 2) is also passed through the interior temperature of thermopair 9,10,11 monitoring simulation packing towers.
As shown in Figure 2, be SO in the passivation tail gas in the described gaseous passivation engineering of the embodiment of the invention
2Concentration graph of a relation over time; X-coordinate is the time of online gas-chromatography monitoring among the figure, and unit is minute; Ordinate zou is the SO of online gas-chromatography monitoring
2The volumetric concentration percentage concentration.SO in the tail gas when gaseous passivation process has just begun as seen from Figure 2
2Content is higher, reaches 0.215%, reduces to 0.016% and also no longer change behind 8h, illustrates that the tower internal reaction finishes substantially, and gaseous passivation finishes, each valve playback.
As shown in Figure 3, Figure 4, be respectively the photo of tower wall behind the photo of tower wall before the described gaseous passivation of the embodiment of the invention and the gaseous passivation.
Do not find that by three thermopairs 9,10,11 temperature has obvious variation in the tower in the passivating process, illustrate because the thermal capacitance of steam is bigger, the shortage of heat that the Iron sulfuret oxidation is discharged so that the temperature of system change.Can find out also the photo contrast that before and after passivation adhere to black precipitate on tower wall and the tower tray before the passivation, black precipitate has become sorrel after the passivation, illustrates that Iron sulfuret has been transformed into the oxide compound of iron such as ferric oxide.
Another specific embodiments of the present invention is:
1, water inlet.Tap water is sent into water softener 4, softened by 4 pairs of tap water of water softener, the tap water after softening enters vapour generator 5 by the Inlet and outlet water valve.
2, discharging.Start vapour generator 5, produce water vapor, measure the flow of water vapors by the steam-flow meter 6 that links to each other with vapour generator 5, open the steam valve 18 that directly links to each other with steam-flow meter 6, open supply gas valve 20 and gathering tank valve 22 more successively, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower 1.
3, monitoring.Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process.
4, supply gas.When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower 1, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air in the compression oxygen-rich air bottle 2 is carried by gas meter 3, and the pressure, the flow that pass through gas meter 3, tensimeter 7 and steam-flow meter 6 show, it is 0.3～0.4Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 1m
3About/h, compression oxygen-rich air pressure 0.3～0.4Mpa, flow is about 400ml/h.
5, passivation.Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography 15 monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 5～20 hours, and SO
2Volumetric concentration reduce to a certain lower level (being generally 0.001%～0.1%) and when within 20～90 minutes, no longer changing, illustrate that the tower internal reaction finishes substantially, gaseous passivation finishes, each valve playback.In passivating process, can be simultaneously by the temperature in thermopair 9,10, the 11 monitoring simulation packing towers 1, as the temperature of simulating in the packing tower 1 is higher than a certain pre-set threshold (for example being 150～260 ℃), then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower 1, treat temperature be reduced to suitable temperature after (80～100 ℃ in this way) continue passivation reaction again.
In general, can not find that by three thermopairs 9,10,11 temperature has obvious variation in the tower in the passivating process, this is because the thermal capacitance of steam is bigger, the shortage of heat that the Iron sulfuret oxidation is discharged so that the temperature of system change.
Another embodiment of the present invention is a kind of Iron sulfuret gaseous passivation method, comprises the step of the step of monitoring, the step of supplying gas and passivation.
Described method may further include the step of sealing and the step of discharging.
The step of described passivation is preferably: carry oxygen-rich air by steam and enter the gaseous passivation of implementing Iron sulfuret in the sealed vessel.
Described steam can be water vapor, and the pressure of described steam is 0.1～0.9Mpa.
Described oxygen-rich air can be 21%～50% air for the volume percent oxygen level.
Described steam can be water vapor, and the pressure of described steam is preferably 0.3～0.4Mpa; Described oxygen-rich air is preferably 21%～35% air for the volume percent oxygen level.
The step of described discharging can for: start vapour generator, produce water vapor, open the steam valve 18 that directly links to each other with steam-flow meter, open supply gas valve 20 and gathering tank valve 22 more successively, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower.
The step of described passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration; SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 6～18 hours, and SO
2Volumetric concentration reduce to 0.002%～0.08%, and when no longer changing within 30～80 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
The step of described passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 160～240 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, when treating that temperature is reduced to 85～95 ℃, continue passivation reaction again.
Described method preferably further comprises:
Sealing; To treat that passivating material is positioned in the simulation packing tower of sealing;
Water inlet; Water is entered vapour generator by the Inlet and outlet water valve;
Discharging; Start vapour generator and produce water vapor, open the steam valve 18 that links to each other with steam-flow meter, open supply gas valve 20 and gathering tank valve 22 more successively, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.25～0.45Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.8～1.2m
3/ h, compression oxygen-rich air pressure 0.25～0.45Mpa, flow is 200～600ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 6～16 hours, and SO
2Volumetric concentration reduce to 0.003%～0.09%, and when no longer changing within 25～85 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
An embodiment more of the present invention is a kind of petrochemical equipment gaseous passivation method, comprises the step of supplying gas and the step of passivation.
Described method may further include the step of monitoring and the step of discharging.
The step of described passivation can for: carry oxygen-rich air by steam and enter in the sealed vessel gaseous passivation of implementing Iron sulfuret.
Described steam is preferably water vapor, and the pressure of described steam is 0.2～0.8Mpa.
Described oxygen-rich air is preferably 22%～55% air for the volume percent oxygen level.
Described steam can be water vapor, and the pressure of described steam is 0.25～0.45Mpa; Described oxygen-rich air is 23%～36% air for the volume percent oxygen level.
The step of described discharging is preferably: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
The step of described passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 7～19 hours, and SO
2Volumetric concentration reduce to 0.001%～0.09%, and when no longer changing within 30～60 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
The step of described passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 180～240 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 70～100 ℃ passivation reaction.
Described method may further include:
Water inlet; Tap water is sent into water softener, by water softener tap water is softened, the tap water after softening enters vapour generator by the Inlet and outlet water valve;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.3～0.4Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.9～1.1m
3/ h, compression oxygen-rich air pressure 0.2～0.5Mpa, flow is 150～550ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 8～14 hours, and SO
2Volumetric concentration reduce to 0.001%～0.07%, and when no longer changing within 30～80 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Another embodiment of the present invention is an a kind of petrochemical equipment gaseous passivation system, comprises gaseous passivation device, exhaust gas processing device and data analysis set-up.
Described exhaust gas processing device can link to each other with described gaseous passivation device, is used for handling the obnoxious flavour that passivating process produces.
Described exhaust gas processing device may further include: the lye vat, tail gas valve 23 and the drain tap 24 that contain 10% sodium hydroxide solution.
Described data analysis set-up,
Can link to each other with described gaseous passivation device, be used for the preceding inflammable gas Data Detection of gaseous passivation;
And, in the gaseous passivation process, to the SO of passivation generation
2The linearity test of concentration.
Described data analysis set-up may further include: gas flow dryer, gas chromatograph, weigher, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger.
Described gaseous passivation device can link to each other with data analysis set-up with described exhaust gas processing device respectively, is used for petrochemical equipment is carried out gaseous passivation.
Described gaseous passivation device preferably further comprises: steam supply part, oxygen supply part and sealing element.
Described steam supply part may further include: water softener, vapour generator, steam-flow meter and valve.
Described oxygen supply part may further include: compression oxygen-rich air bottle, gas meter, oxygen air intake valve 17 and oxygen valve 19.
Described sealing element may further include: packing tower, give vent to anger valve 23 and gathering tank valve 22.
Described gaseous passivation system in use, the step of discharging can for: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
Described gaseous passivation system in use, the step of passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～15 hours, and SO
2Volumetric concentration reduce to 0.005%～0.01%, and when no longer changing within 35～55 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Described gaseous passivation system in use, the step of passivation may further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 190～270 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 80～110 ℃ passivation reaction.
Described gaseous passivation system method in use can comprise:
Water inlet; Water is sent into water softener, by water softener water is softened, the water after softening enters vapour generator;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.2～0.5Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.8～1.2m
3/ h, compression oxygen-rich air pressure 0.2～0.4Mpa, flow is 120～580ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 9～12 hours, and SO
2Volumetric concentration reduce to 0.002%～0.1%, and when no longer changing within 40～70 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Another embodiment of the present invention is a kind of Iron sulfuret gaseous passivation device, comprises steam supply part, oxygen supply part and sealing element.
Described gaseous passivation device can link to each other with data analysis set-up with exhaust gas processing device respectively, is used for petrochemical equipment is carried out gaseous passivation.
Described steam supply part may further include: water softener, vapour generator, steam-flow meter and valve.
Described oxygen supply part may further include: compression oxygen-rich air bottle, gas meter, oxygen air intake valve 17 and oxygen valve 19.
Described sealing element may further include: packing tower, give vent to anger valve 23 and gathering tank valve 22.
Described Iron sulfuret gaseous passivation device in use, the step of discharging can for: start vapour generator, produce water vapor, measure the flow of water vapor by the steam-flow meter that links to each other with vapour generator, open with steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate in the packing tower medium force feed to the gathering tank that is connected with gathering tank valve 22.
Described Iron sulfuret gaseous passivation device in use, the step of passivation can for: open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～15 hours, and SO
2Volumetric concentration reduce to 0.005%～0.01%, and when no longer changing within 35～55 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Described Iron sulfuret gaseous passivation device in use, the step of passivation can further include: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, as when simulating temperature in the packing tower 1 and being higher than 190～270 ℃, then closing oxygen inlet valve door 17, oxygen valve 19, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 80～110 ℃ passivation reaction.
Described Iron sulfuret gaseous passivation device method in use can may further comprise the steps:
Water inlet; Tap water is sent into water softener, by water softener tap water is softened, the tap water after softening enters vapour generator;
Discharging; Start vapour generator and produce water vapor, open steam valve 18, on supply gas valve 20 and gathering tank valve 22, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with gathering tank valve 22 in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door 20 and gathering tank valve 22, the valve 27 of supplying gas under opening will steam the tower steam tail gas with the valve 23 of giving vent to anger and be disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve 23 of giving vent to anger, and monitor inflammable gas content in discharge process.
Described Iron sulfuret gaseous passivation device method in use can further include following steps:
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve 17 and oxygen valve 19, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.3～0.5Mpa that adjusting oxygen air intake valve 17, oxygen valve 19, steam valve 18 keep vapor pressures, and steam flow is 0.8～1.0m
3/ h, compression oxygen-rich air pressure 0.25～0.45Mpa, flow is 110～580ml/h;
Passivation; Open tail gas valve 23, drain tap 24, monitoring air intake valve 25 and the monitoring valve 26 of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～14 hours, and SO
2Volumetric concentration reduce to 0.0015%～0.095%, and when no longer changing within 40～100 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
Claims (14)
1. a petrochemical equipment gaseous passivation system is characterized in that, comprises gaseous passivation device, exhaust gas processing device and data analysis set-up.
2. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that described exhaust gas processing device links to each other with described gaseous passivation device, is used for handling the obnoxious flavour that passivating process produces.
3. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that described exhaust gas processing device further comprises: the lye vat, tail gas valve and the drain tap that contain 10% sodium hydroxide solution.
4. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that, described data analysis set-up,
Link to each other with described gaseous passivation device, be used for the preceding inflammable gas Data Detection of gaseous passivation;
And, in the gaseous passivation process, to the SO of passivation generation
2The linearity test of concentration.
5. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that described data analysis set-up further comprises: gas flow dryer, gas chromatograph, weigher, monitoring air intake valve and the monitoring valve of giving vent to anger.
6. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that described gaseous passivation device links to each other with data analysis set-up with described exhaust gas processing device respectively, is used for petrochemical equipment is carried out gaseous passivation.
7. petrochemical equipment gaseous passivation according to claim 1 system is characterized in that described gaseous passivation device further comprises: steam supply part, oxygen supply part and sealing element.
8. petrochemical equipment gaseous passivation according to claim 7 system is characterized in that described steam supply part further comprises: water softener, vapour generator, steam-flow meter and oxygen valve.
9. petrochemical equipment gaseous passivation according to claim 7 system is characterized in that described oxygen supply part further comprises: compression oxygen-rich air bottle, gas meter, oxygen air intake valve and oxygen valve.
10. petrochemical equipment gaseous passivation according to claim 7 system is characterized in that described sealing element further comprises: packing tower, give vent to anger valve and gathering tank valve.
11. according to each described petrochemical equipment gaseous passivation system in the claim 1～10, it is characterized in that, described gaseous passivation system in use, the step of discharging is: start vapour generator, produce water vapor, the flow of the steam-flow meter metering water vapor by linking to each other with vapour generator, open with steam valve, on supply gas valve and gathering tank valve, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with the gathering tank valve in the packing tower.
12. according to each described petrochemical equipment gaseous passivation system in the claim 1～10, it is characterized in that, described gaseous passivation system in use, the step of passivation is: open tail gas valve, drain tap, monitoring air intake valve and the monitoring valve of giving vent to anger, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 10～15 hours, and SO
2Volumetric concentration reduce to 0.005%～0.01%, and when no longer changing within 35～55 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
13. petrochemical equipment gaseous passivation according to claim 12 system, it is characterized in that, described gaseous passivation system in use, the step of passivation further comprises: in passivating process, simultaneously by the temperature in the thermocouple monitoring simulation packing tower, when being higher than 190～270 ℃ as the temperature in the simulation packing tower, then closing oxygen inlet valve door, oxygen valve, end the reaction in the simulation packing tower, treat to continue again when temperature is reduced to 80～110 ℃ passivation reaction.
14., it is characterized in that described gaseous passivation system method in use comprises according to each described petrochemical equipment gaseous passivation system in the claim 1～10:
Water inlet; Water is sent into water softener, by water softener water is softened, the water after softening enters vapour generator;
Discharging; Start vapour generator and produce water vapor, open steam valve, on supply gas valve and gathering tank valve, utilize steam will simulate the gathering tank that the medium force feed extremely is connected with the gathering tank valve in the packing tower;
Monitoring; Close after discharging finishes and close air delivery valve door and gathering tank valve, the valve of supplying gas under opening steams the tower steam tail gas with the air outlet valve goalkeeper and is disposed to exhaust gas processing device and the data analysis set-up that is connected with the valve of giving vent to anger, and monitors inflammable gas content in discharge process;
Supply gas; When monitoring according to data analysis set-up, when inflammable gas content is not in its limits of explosion scope in the packing tower, open oxygen air intake valve and oxygen valve, oxygen-rich air is carried, and the pressure, the flow that pass through gas meter, tensimeter and steam-flow meter show, it is 0.2～0.5Mpa that adjusting oxygen air intake valve, oxygen valve, steam valve keep vapor pressure, and steam flow is 0.8～1.2m
3/ h, compression oxygen-rich air pressure 0.2～0.4Mpa, flow is 120～580ml/h;
Passivation; Open tail gas valve, drain tap, monitoring air intake valve and the monitoring valve of giving vent to anger successively, start online gas-chromatography monitoring SO then
2Concentration, SO in the tail gas when gaseous passivation process has just begun
2Content is higher, when after 9～12 hours, and SO
2Volumetric concentration reduce to 0.002%～0.1%, and when no longer changing within 40～70 minutes, the tower internal reaction finishes, gaseous passivation finishes, each valve playback.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105463365A (en) * | 2015-11-19 | 2016-04-06 | 北京石油化工学院 | Spontaneous-combustion active ferrous sulfide gaseous phase passivation device and method |
| CN107916417A (en) * | 2016-10-11 | 2018-04-17 | 三浦工业株式会社 | Passivation device and method |
| CN116143178A (en) * | 2023-04-23 | 2023-05-23 | 北京石油化工学院 | Vapor phase passivation system and method for iron-sulfur compounds |
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| WO2007049069A1 (en) * | 2005-10-24 | 2007-05-03 | Johnson Matthey Plc | Metal passivation |
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| CN105463365A (en) * | 2015-11-19 | 2016-04-06 | 北京石油化工学院 | Spontaneous-combustion active ferrous sulfide gaseous phase passivation device and method |
| CN107916417A (en) * | 2016-10-11 | 2018-04-17 | 三浦工业株式会社 | Passivation device and method |
| CN116143178A (en) * | 2023-04-23 | 2023-05-23 | 北京石油化工学院 | Vapor phase passivation system and method for iron-sulfur compounds |
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