CN104694932B - A kind of optimization method for oil and gas commercial plant anticorrosive measure - Google Patents
A kind of optimization method for oil and gas commercial plant anticorrosive measure Download PDFInfo
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- CN104694932B CN104694932B CN201510039048.8A CN201510039048A CN104694932B CN 104694932 B CN104694932 B CN 104694932B CN 201510039048 A CN201510039048 A CN 201510039048A CN 104694932 B CN104694932 B CN 104694932B
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Abstract
The invention discloses a kind of optimization method for oil and gas commercial plant anticorrosive measure, it includes carrying out the optimization of material anticorrosive measure, according to corrosive medium content in device technique medium, and its corrosion failure form, the actual corrosion rate threshold values caused to equipment and pipeline etc. rationally determines that the emphasis corrosion location of equipment and pipeline uses material；The optimization of process corrosion protection measure is carried out, according to carrying out specification technological operation, the sampling analysis for strengthening Korrosionsmedium to the real-time monitoring of device emphasis corrosion location, the quality that effectively control processing medium is handled, effectively use corrosion inhibiter；Set on the optimization of corrosion monitoring and detecting measure, Improving Equipment and pipeline emphasis corrosion location quantity and the position of online corrosion rate monitoring point, and quantity and the position of offline fixed point thickness measure point are set；Corrosion failure case reductive analysis is carried out, corrosion failure database and reductive analysis is set up, it is ensured that the even running of oil and gas commercial plant.
Description
Technical field
Prevent the present invention relates to oil and gas industrial circle, more particularly to a kind of oil and gas commercial plant that is used for
The optimization method of corrosion measure.
Background technology
With the worsening shortages of the energy, the exploitation processing of high-sulfur or high acid value crude oil with poor quality and the exploitation of sulfur-containing gas profit
With being China's oil and the benefit growth point of gas industry and development trend, still, these inferior raw materials contain abundant
The corrosive medium such as chloride, sulfide, inorganic salts, aphthenic acids, nitride, hydrogen sulfide, carbon dioxide, oxygen so that oil refiningization
Frock is put and the oil and gas industrial installation equipment such as high sulfur-containing natural gas purifier faces huge corrosion risk.
Moreover, as deepening continuously for process is processed or developed in exploitation, the property of raw material can be continually changing, and in poor quality trend is more
Substantially, Korrosionsmedium content will be continuously increased or change, with stronger corrosivity, cause device design initial stage anti-corrosion
The need for erosion measure can not fully meet actual production, for example：Equipment and the material of pipeline have not met the anti-corrosion of new environment
Erosion requires that technological operation index needs timely adjustment, and the sampling analysis of Korrosionsmedium needs to accelerate and position, it is desirable to have
The quality of effect control processing medium processing and effectively use corrosion inhibiter, corrosion monitoring and detecting layouts quantity and position needs to optimize etc..
Because the device unplanned shutdown that etching problem is caused frequently occurs, while production task but increases year by year, this has a strong impact on dress
Put long period safe operation.
The content of the invention
In view of above-mentioned the deficiencies in the prior art, one kind that the present invention is provided is used for oil and gas commercial plant anticorrosion
The optimization method of measure, farthest optimization device anticorrosive measure, reduces influence of the corrosion to device, it is ensured that oil and day
The even running of right gas commercial plant.
In order to solve the above technical problems, the present invention program includes：
A kind of optimization method for oil and gas commercial plant anticorrosive measure, it comprises the following steps：
A, the optimization for carrying out material anticorrosive measure, i.e., according to corrosive medium content in device technique medium, and its pair set
Corrosion failure form, actual corrosion rate threshold values that standby and pipeline is caused etc. rationally determines the emphasis corrosion location of equipment and pipeline
Used material；
B, the optimization for carrying out process corrosion protection measure, i.e., carry out specification according to the real-time monitoring to device emphasis corrosion location
Technological operation, strengthen Korrosionsmedium sampling analysis, effectively control processing medium processing quality, effectively use corrosion inhibiter；
C, the optimization for carrying out corrosion monitoring and detecting measure, i.e., set online corrosion on Improving Equipment and pipeline emphasis corrosion location
The quantity of speed monitoring point and position, and quantity and the position of offline fixed point thickness measure point are set；
D, progress corrosion failure case reductive analysis, i.e., timely collating unit corrosion failure case set up corrosion failure number
According to storehouse, corrosion failure case reductive analysis is carried out.
Described optimization method, wherein, the optimization that the step A carries out material anticorrosive measure is specifically included：According to dress
Put corrosive medium content in processing medium, and its equipment and pipeline are caused corrosion failure form, actual corrosion rate threshold values
Use material whether reasonable Deng the emphasis corrosion location for determining equipment and pipeline, and the suitable material of reasonable selection, make in fact
Border corrosion rate is less than permissible value.For example：H in certain high sulfur-containing natural gas purifier unstripped gas2S contents are 15% (V) left and right,
Vent gas treatment is absorbed using the desulfurization of MDEA methods, the dehydration of triethylene glycol method, two grades of conversion method sulphur recoveries of conventional Claus, hydrogenating reduction
Process route.Desulfurization unit contains H2S、CO2, the corrosive medium such as rich amine solution and its catabolite and thermal-stable salt, acid gas causes
Electrochemistry and stress corrosion, rich amine solution and its catabolite and thermal-stable salt cause electrochemistry and erosion corrosion.Sulphur recovery
Contain SO with tail gas treating unit2, S steams, H2S、CO2、O2Deng easily occurring high temperature vulcanized, oxide etch in high temperature position, low
Sulfuric acid or sulfurous acid dew piont corrosion occur for warm position and Wet H2S causes electrochemistry and stress corrosion, and generally a variety of corrosion are common to be made
With.Dewatering unit contains H2S、CO2, glycol and its catabolite etc., wet H2S and rich glycol and its catabolite may cause electrification
Learn and stress corrosion.Therefore, desulfurization unit absorption tower and hydrolysis reactor use stainless compound steel plate；Desulfurization, dehydration the day after tomorrow
The equipment and pipeline that right gas passes through use carbon steel, amine liquid regenerator top and regeneration overhead air cooler, return tank of top of the tower and tower
Bottom reboiler, poor rich liquid heat exchanger use stainless steel；Sulphur recovery reacting furnace shell material is carbon steel；The first order, the second level
Converter and hydrogenation reactor use stainless steel, are provided with heat insulation and wear resistance acid-proof lining inside it；The first order, the second level and end
Level sulfur condenser uses carbon steel.
Described optimization method, wherein, the optimization that the step B carries out process corrosion protection measure is specifically included：Specification work
Skill is operated, i.e., influence the technological parameter of corrosion to carry out operating real-time monitoring device emphasis corrosion location, and according to feedback
Data adjust technological operation index in time.For example：Above-mentioned high sulfur-containing natural gas purifier controls the reboiling of amine liquid regenerative system
Device operation temperature is not higher than 149 DEG C；Regenerator temperature is controlled at 90 DEG C~95 DEG C；Flow velocity of the amine liquid in pipeline typically should not be high
In 1.5m/s, the flow velocity in heat exchanger tube pass is no more than 0.9m/s；Rich amine solution enters regenerator flow velocity not higher than 1.2m/s；Regeneration
Tower top acidity water system carbon steel pipe line coutroi velocity is no more than 5m/s；Chilled water (chw) pH value is controlled between 7~8.
Described optimization method, wherein, the optimization that the step B carries out process corrosion protection measure specifically also includes：Strengthen
The sampling analysis of Korrosionsmedium, i.e. quantity and position to Korrosionsmedium sampling analysis point are optimized, or increasing adds deduct
Less or rearrange, and analyze data is rationally applied.For example：Above-mentioned high sulfur-containing natural gas purifier increases poor, richness
Thermal-stable salt, catabolite, O in amine liquid2, pH value analysis, increase amine liquid prepares the water analysis of water, increases regeneration overhead
Acidic aqueous media is analyzed, CO in increase glycol2, H2S、O2, catabolite (such as organic acid), pH value analysis.
Described optimization method, wherein, the optimization that the step B carries out process corrosion protection measure specifically also includes：Effectively
The quality of processing medium processing is controlled, it is reduced or avoid to equipment and the corrosivity of pipeline.For example：It is natural in above-mentioned high sulfur-bearing
Increase filtering and removing equipment in air purifying apparatus amine liquid regenerative system, and add in foam inhibiting agent, amine liquid replenishment system using nitrogen
Sealing；Increase filtering and removing equipment in glycol reclamation system, glycol, which is reclaimed, uses nitrogen-sealed in can system；Steam generator
Continuous filling sodium phosphate, adding amount is two tons annual.
Described optimization method, wherein, the optimization that the step B carries out process corrosion protection measure specifically also includes：Have
Effect uses corrosion inhibiter, i.e., whether slow down corrosion using filling corrosion inhibiter to device heavy corrosion position, and effectively control inhibition
The using effect of agent.For example：Corrosion inhibiter, amine liquid regenerator are filled in above-mentioned high sulfur-containing natural gas purifier rich amine solution system
Corrosion inhibiter or fresh amine liquid, absorption tower bottom outlet richness glycol pipeline filling buffer or nertralizer are filled in the system of top.
Described optimization method, wherein, the optimization that the step C carries out corrosion monitoring and detecting measure is specifically included：Improve and set
The online corrosion rate monitoring measure set on standby and pipeline emphasis corrosion location, i.e., on-line corrosion monitoring is layouted quantity and position
Put whether rationally and the whether accurate actual corrosion condition of actual response of Monitoring Data, if set up monitor database and corrosion monitoring
Management system, timely statistics and analysis Monitoring Data, specifies corrosion rate.For example：In above-mentioned high sulfur-containing natural gas purifier
Selexol process tower rich solution outlet, poor rich liquid heat exchanger/rich amine solution outlet, amine regeneration overhead return tank/acid gas outlet, amine regeneration
Return tank of top of the tower/sour water outlet, the outlet of third level condensator outlet, hydrogenation reactor, acid water feed entrance, two grades of sulphur condensations
Device entrance, chilling exit of pump, sewage stripping tower top, final stage sulfur condenser outlet, Regenerator Bottom Reboiler gas return pipeline with
Regeneration overhead return line, all should set inductance to detect pin on the corrosion location, its corrosion rate is monitored in real time.
Described optimization method, wherein, the optimization that the step C carries out corrosion monitoring and detecting measure specifically also includes：It is perfect
Whether the offline fixed point thickness measure set in equipment and pipeline emphasis corrosion location, i.e., spot thickness measurement is layouted quantity and position
Rationally and whether detection data accurate, the actual corrosion condition of actual response, if set up Test database and Corrosion monitoring is managed
System, timely statistics and analysis detects data, specifies corrosion rate.For example：In high sulfur-containing natural gas purifier raw material tracheae
Line is low-lying to be held at liquid, unstripped gas torch blow-down pipe it is low-lying hold at liquid, at first grade absorption tower gas inlet pipeline elbow, one-level
It is rich that absorption tower rich amine solution is drawn to flash tank pipeline elbow, poor rich amine solution heat exchanger and its shell layer inlet/outlet pipeline, regenerator
Amine liquid suction line elbow, regenerator bottom lean solution are drawn to poor rich liquid heat exchanger pipeline elbow, reboiler and its rich amine solution and entered
Outlet line, acid gas pipeline be low-lying to be held at liquid, acid gas torch blow-down pipe it is low-lying hold at liquid, molten sulfur to tail gas burning furnace deaeration pipe
Line is low-lying to be held at liquid, dehydrating tower is exported to rich glycol side pipe line, the regenerator of flash tank richness TEG pipelines, rich or poor glycol heat exchanger
Reboiler inlet/outlet pipeline, acid water- to-water heat exchanger to stripper pipeline, sour water stripping (SWS) tower top gas pipeline, chilling tower extract pipeline out extremely
The position such as at chilling pump entrance, all should set spot thickness measurement, its thickness of periodic measurement.
Described optimization method, wherein, the step D carries out corrosion failure case reductive analysis and specifically included：Whether build
Vertical corrosion failure case library and corrosion case management system, timely statistics and analysis detect data, clearly corrode cause of accident.Example
Such as：The above-mentioned high sulfur-containing natural gas purifier of statistical analysis goes into operation to April in 2011 20 major accidents for 2009, obtain with
Draw a conclusion：1) accident occurrence cause：Burn into FeS spontaneous combustions, constructional deficiency, constructional deficiency+corrosion, wherein, corrode for it is most important because
Element, accounts for total number of accident 60%；Secondly FeS spontaneous combustions, account for sum 25%；Go into operation initial stage, device constructional deficiency can not be ignored, and account for sum
15%.2) main corrosion type：Wet H2S, amine liquid catabolite and burn into sulfurous acid or sulfuric acid caused by thermal-stable salt
Dew point corrosion, high temperature sulphur and oxide etch etc.；Main corrosion position：Amine liquid system heat exchanger, two grades, final stage sulfur condenser and pipe
Line, sulphur cooler and degassing pipeline, tail gas hydrogenation aftercooler and quenching water column bottom extract pipeline, sulphur storage and transportation system out
Deng.3) ferrous sulfide spontaneous combustion repeatedly occurs for sulphur storage and storing and transporting system, should draw attention, take measures.
The invention provides a kind of optimization method for oil and gas commercial plant anticorrosive measure, present invention side
Case integrated application material anti-corrosion, Process anti-corrosion (including operation monitoring and specification technological operation, medium analysis, processing medium processing,
Medicament is filled), corrosion monitoring and detecting, the technological means such as corrosion failure analysis of cases, to oil and gas commercial plant anticorrosion
Measure carries out efficiency evaluation and optimization, and the continuous in poor quality of feedstock property is solved in time and causes the anticorrosive measure of device can not be complete
The situation of full up sufficient needs of production, farthest optimization device anticorrosive measure, influence of the reduction corrosion to device, are protected
The even running of oil and gas commercial plant is demonstrate,proved.
Brief description of the drawings
Fig. 1 is the logical relation schematic diagram of optimization method in the present invention；
Fig. 2 is the schematic flow sheet of optimization method in the present invention.
Embodiment
The invention provides a kind of optimization method for oil and gas commercial plant anticorrosive measure, to send out this
Bright purpose, technical scheme and effect are clearer, clear and definite, and the present invention is described in more detail below.It should be appreciated that herein
Described specific embodiment only to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of optimization method for oil and gas commercial plant anticorrosive measure, such as Fig. 2 institutes
Show, it comprises the following steps：
Step 101：Carry out the optimization of material anticorrosive measure, i.e., according to corrosive medium content in device technique medium, and
Its corrosion failure form caused to equipment and pipeline, actual corrosion rate threshold values etc. rationally determine that the emphasis of equipment and pipeline is rotten
Erosion position uses material；
Step 102：Carry out the optimization of process corrosion protection measure, i.e., according to device emphasis corrosion location it is real-time monitor into
The technological operation of professional etiquette model, the sampling analysis of reinforcement Korrosionsmedium, the quality of effective control processing medium processing, effective use are delayed
Lose agent；
Step 103：The optimization of corrosion monitoring and detecting measure is carried out, i.e., is arranged on Improving Equipment and pipeline emphasis corrosion location
The quantity of line corrosion rate monitoring point and position, and quantity and the position of offline fixed point thickness measure point are set；
Step 104：Corrosion failure case reductive analysis is carried out, i.e., timely collating unit corrosion failure case sets up corrosion
Fail data storehouse, carries out corrosion failure case reductive analysis.
Further, the optimization of the step 101 progress material anticorrosive measure specifically also includes：According to device work
Corrosive medium content in skill medium, and its corrosion failure form, the actual corrosion rate threshold values caused to equipment and pipeline etc. is really
Whether the emphasis corrosion location of locking equipment and pipeline uses material reasonable, and the suitable material of reasonable selection, makes it actual rotten
Lose speed and be less than permissible value.For example：H in certain high sulfur-containing natural gas purifier unstripped gas2S contents are 15% (V) left and right, are used
The desulfurization of MDEA methods, the dehydration of triethylene glycol method, the work of two grades of conversion method sulphur recoveries of conventional Claus, hydrogenating reduction absorption vent gas treatment
Skill route.Desulfurization unit contains H2S、CO2, the corrosive medium such as rich amine solution and its catabolite and thermal-stable salt, acid gas causes electrification
Learn and stress corrosion, rich amine solution and its catabolite and thermal-stable salt cause electrochemistry and erosion corrosion.Sulphur recovery and tail
Gas disposal unit contains SO2, S steams, H2S、CO2、O2Deng easily occurring high temperature vulcanized, oxide etch in high temperature position, in low temperature portion
Sulfuric acid or sulfurous acid dew piont corrosion occur for position and Wet H2S causes electrochemistry and stress corrosion, usual a variety of corrosion collective effects.It is de-
Water unit contains H2S、CO2, glycol and its catabolite etc., wet H2S and rich glycol and its catabolite may cause electrochemistry and should
Power is corroded.Therefore, desulfurization unit absorption tower and hydrolysis reactor use stainless compound steel plate；Natural gas is passed through after desulfurization, dehydration
The equipment and pipeline crossed use carbon steel, amine liquid regenerator top and regeneration overhead air cooler, return tank of top of the tower and bottom of towe reboiling
Device, poor rich liquid heat exchanger use stainless steel；Sulphur recovery reacting furnace shell material is carbon steel；The first order, second level converter
Heat insulation and wear resistance acid-proof lining is provided with and hydrogenation reactor uses stainless steel, inside it；The first order, the second level and final stage sulphur are cold
Condenser uses carbon steel.
Further, the optimization of the step 102 progress process corrosion protection measure specifically also includes：Specification technique is grasped
Make, i.e., influence the technological parameter of corrosion to carry out operating real-time monitoring device emphasis corrosion location, and according to feedback data
Technological operation index is adjusted in time.For example：The reboiler behaviour of above-mentioned high sulfur-containing natural gas purifier control amine liquid regenerative system
149 DEG C are not higher than as temperature；Regenerator temperature is controlled at 90 DEG C~95 DEG C；Flow velocity of the amine liquid in pipeline should be typically not higher than
1.5m/s, the flow velocity in heat exchanger tube pass is no more than 0.9m/s；Rich amine solution enters regenerator flow velocity not higher than 1.2m/s；Regenerator
The acid water system carbon steel pipe line coutroi velocity in top is no more than 5m/s；Chilled water (chw) pH value is controlled between 7~8.
Also include：Strengthen the sampling analysis of Korrosionsmedium, the i.e. quantity to Korrosionsmedium sampling analysis point and position
Optimize, or increase or decrease or rearrange, and analyze data is rationally applied.For example：Above-mentioned high sulfur-bearing is natural
Air purifying apparatus increases thermal-stable salt, catabolite, O in poor, rich amine solution2, pH value analysis, increase amine liquid prepares the water of water
Matter is analyzed, the acidic aqueous media analysis of increase regeneration overhead, CO in increase glycol2, H2S、O2, catabolite (such as organic acid), pH value
Analysis.
Also include：Effectively the quality of control processing medium processing, reduces or avoids it to equipment and the corrosivity of pipeline.Example
Such as：Increase filtering and removing equipment in above-mentioned high sulfur-containing natural gas purifier amine liquid regenerative system, and add foam inhibiting agent, amine liquid
Nitrogen-sealed is used in replenishment system；Increase filtering and removing equipment in glycol reclamation system, glycol is reclaimed to be used in can system
Nitrogen-sealed；Steam generator continuously fills sodium phosphate, and adding amount is two tons annual.
Also include：Effectively corrosion inhibiter is used, i.e., whether using filling corrosion inhibiter corruption is slowed down to device heavy corrosion position
Erosion, and effectively control the using effect of corrosion inhibiter.For example：Filled in above-mentioned high sulfur-containing natural gas purifier rich amine solution system
Corrosion inhibiter or fresh amine liquid are filled in corrosion inhibiter, amine liquid regeneration overhead system, bottom outlet richness glycol pipeline filling in absorption tower is slow
Electuary or nertralizer.
Further, the optimization of the step 103 progress corrosion monitoring and detecting measure specifically also includes：Carry out corrosion prison
The optimization of detection method is specifically included：The online corrosion rate monitoring set on Improving Equipment and pipeline emphasis corrosion location is arranged
Apply, i.e., rationally and whether accurate Monitoring Data actual response be actual corrodes shape whether on-line corrosion monitoring is layouted quantity and position
Condition, if set up monitor database and corrosion monitoring management system, timely statistics and analysis Monitoring Data specifies corrosion rate.
For example：Above-mentioned high sulfur-containing natural gas purifier selexol process tower rich solution outlet, the outlet of poor rich liquid heat exchanger/rich amine solution,
Amine regeneration overhead return tank/acid gas outlet, amine regeneration overhead return tank/sour water outlet, third level condensator outlet, hydrogenation reaction
Device outlet, acid water feed entrance, two grades of sulfur condenser entrances, chilling exit of pump, sewage stripping tower top, the condensations of final stage sulphur
Device outlet, Regenerator Bottom Reboiler gas return pipeline and regeneration overhead return line, and inductance all should be set on the corrosion location
Pin is detected, its corrosion rate is monitored in real time.
Also include：The offline fixed point thickness measure set on Improving Equipment and pipeline emphasis corrosion location, i.e. spot thickness measurement
The quantity layouted and position whether rationally and detection data whether accurate, the actual corrosion condition of actual response, if set up and detect
Database and Corrosion monitoring management system, timely statistics and analysis detect data, specify corrosion rate.For example：In high sulfur-bearing day
Right air purifying apparatus raw material gas pipeline is low-lying to be held at liquid, unstripped gas torch blow-down pipe it is low-lying hold at liquid, first grade absorption tower it is natural
Gas suction line elbow, first grade absorption tower rich amine solution are drawn to flash tank pipeline elbow, poor rich amine solution heat exchanger and its shell
Layer inlet/outlet pipeline, regenerator rich amine solution suction line elbow, that regenerator bottom lean solution is drawn to poor rich liquid heat exchanger pipeline is curved
Head, reboiler and its rich amine solution inlet/outlet pipeline, acid gas pipeline it is low-lying hold at liquid, acid gas torch blow-down pipe it is low-lying hold at liquid,
Molten sulfur to tail gas burning furnace degassing pipeline it is low-lying hold at liquid, dehydrating tower is exported to flash tank richness TEG pipelines, rich or poor glycol heat exchanger
Rich glycol side pipe line, regenerator reboiler inlet/outlet pipeline, acid water- to-water heat exchanger to stripper pipeline, sour water stripping (SWS) tower overhead gas
Pipeline, chilling tower extract out pipeline to chilling pump entrance at etc. position, spot thickness measurement, its thickness of periodic measurement all should be set.
Further, the step 104, which carries out corrosion failure case reductive analysis, specifically also includes：Whether corruption is set up
Erosion failure case library and corrosion case management system, timely statistics and analysis detect data, clearly corrode cause of accident.For example：
The above-mentioned high sulfur-containing natural gas purifier of statistical analysis goes into operation to April in 2011 20 major accidents for 2009, obtains following
Conclusion：1) accident occurrence cause：Burn into FeS spontaneous combustions, constructional deficiency, constructional deficiency+corrosion, wherein, corrode for it is most important because
Element, accounts for total number of accident 60%；Secondly FeS spontaneous combustions, account for sum 25%；Go into operation initial stage, device constructional deficiency can not be ignored, and account for sum
15%.2) main corrosion type：Wet H2S, amine liquid catabolite and burn into sulfurous acid or sulfuric acid caused by thermal-stable salt
Dew point corrosion, high temperature sulphur and oxide etch etc.；Main corrosion position：Amine liquid system heat exchanger, two grades, final stage sulfur condenser and pipe
Line, sulphur cooler and degassing pipeline, tail gas hydrogenation aftercooler and quenching water column bottom extract pipeline, sulphur storage and transportation system out
Deng.3) ferrous sulfide spontaneous combustion repeatedly occurs for sulphur storage and storing and transporting system, should draw attention, take measures.
In order to which the present invention is described in further detail, it is exemplified below more detailed embodiment and illustrates.
As shown in Figure 1, first, compile the field data related to device anticorrosive measure efficiency evaluation, mark
Accurate, document and worth experience used for reference etc., and pass through live data analysis, standard comparison, literature survey, correlation experience reference etc.
Means carry out following appraisal.
Secondly, material anti-corrosion measure efficiency evaluation is carried out, whether determining device corrosion keypoint part is reasonable using material,
Its actual corrosion rate is less than permissible value.
Again, carry out Process cor- rosion- protection efficiency evaluation, including operation monitoring and specification technological operation, medium analysis,
Processing medium processing, medicament filling, wherein：
Operation monitoring and specification technological operation refer to whether the technological parameter of influence corrosion carries out operating real-time monitoring,
And adjusted in time according to feedback data and specification technological operation；
Whether medium analysis refers to carries out sampling analysis to corrosive medium in time, and whether analyze data, which is able to, is rationally applied；
Processing medium processing refers to whether corrosive medium is rationally handled, and reduces or avoid its corrosivity；
Medicament filling refers to whether slow down seriously corroded position corrosion using filling corrosion inhibiter, and its corrosion inhibiter filling effect
Whether fruit is effective.
Again, corrosion monitoring and detecting effective evaluation, including on-line corrosion monitoring and spot thickness measurement are carried out, wherein：
Corrosion monitoring refers to whether rationally and whether accurate Monitoring Data actual response be actual corrosion on-line corrosion monitoring layouts
Corrosion condition, if set up monitor database and corrosion monitoring management system, timely statistics and analysis Monitoring Data is clearly corroded
Speed；
Corrosion monitoring refers to whether rationally and whether detection data accurate, actual response actual corrosion corrosion spot thickness measurement layouts
Situation, if set up Test database and Corrosion monitoring management system, timely statistics and analysis detects data, clearly corrodes speed
Rate.
Again, corrosion failure analysis of cases is carried out, refers to and whether sets up corrosion failure case library and corrosion case management system,
Timely statistics and analysis detection data, clearly corrode cause of accident.Carry out other evaluation measures.
Finally, in each special anti-corrosions such as comprehensive material anti-corrosion, Process anti-corrosion, corrosion monitoring and detecting, corrosion failure analyses of cases
On the basis of erosion measure efficiency evaluation, the overall anti-corrosion measure Optimizing Suggestions of device are proposed.
Certainly, described above is only presently preferred embodiments of the present invention, and the present invention is not limited to enumerate above-described embodiment, should
When explanation, any those skilled in the art are all equivalent substitutes for being made, bright under the teaching of this specification
Aobvious variant, all falls within the essential scope of this specification, ought to be protected by the present invention.
Claims (6)
1. a kind of optimization method for oil and gas commercial plant anticorrosive measure, it comprises the following steps：
A, the optimization for carrying out material anticorrosive measure, according to corrosive medium content in device technique medium, and its to equipment and pipe
Corrosion failure form that road is caused, actual corrosion rate threshold values rationally determine that the emphasis corrosion location of equipment and pipeline uses material
Matter；
B, the optimization for carrying out process corrosion protection measure, specification technique behaviour is carried out according to the real-time monitoring to device emphasis corrosion location
Make, strengthen the sampling analysis of Korrosionsmedium, effectively control the quality of processing medium processing, effectively use corrosion inhibiter；
Online corrosion rate is set to supervise on C, the optimization for carrying out corrosion monitoring and detecting measure, Improving Equipment and pipeline emphasis corrosion location
The quantity of measuring point and position, and quantity and the position of offline fixed point thickness measure point are set；
D, progress corrosion failure case reductive analysis, set up corrosion failure database and reductive analysis；
The optimization that the step A carries out material anticorrosive measure specifically also includes：According to corrosive medium in device technique medium
Content, and its corrosion failure form that is caused to equipment and pipeline, actual corrosion rate threshold values determine the emphasis of equipment and pipeline
Whether corrosion location uses material reasonable, and the suitable material of reasonable selection, its actual corrosion rate is less than permissible value；It is high
Sulfur-containing gas purifier desulfurization unit absorption tower and hydrolysis reactor use stainless compound steel plate；Desulfurization, dehydration the day after tomorrow
The equipment and pipeline that right gas passes through use carbon steel, amine liquid regenerator top and regeneration overhead air cooler, return tank of top of the tower and tower
Bottom reboiler, poor rich liquid heat exchanger use stainless steel；Sulphur recovery reacting furnace shell material is carbon steel；The first order, the second level
Converter and hydrogenation reactor use stainless steel, are provided with heat insulation and wear resistance acid-proof lining inside it；The first order, the second level and end
Level sulfur condenser uses carbon steel；
The optimization that the step B carries out process corrosion protection measure specifically also includes：Specification technological operation, corrodes to device emphasis
The technological parameter of position influence corrosion carries out operating real-time monitoring, and adjusts technological operation in time according to feedback data and refer to
Mark；The reboiler operation temperature of above-mentioned high sulfur-containing natural gas purifier control amine liquid regenerative system is not higher than 149 DEG C；Control is again
Raw tower temperature degree is at 90 DEG C~95 DEG C；Flow velocity of the amine liquid in pipeline should typically be not higher than 1.5m/s, the stream in heat exchanger tube pass
Speed is no more than 0.9m/s；Rich amine solution enters regenerator flow velocity not higher than 1.2m/s；Regeneration overhead acidity water system carbon steel pipe line control
Flow velocity is no more than 5m/s；Chilled water (chw) pH value is controlled between 7~8；
The optimization that the step C carries out corrosion monitoring and detecting measure specifically also includes：Improving Equipment and pipeline emphasis corrosion location
Rationally and whether detection data are accurate whether the offline fixed point thickness measure of upper setting, i.e., spot thickness measurement is layouted quantity and position
Really, the actual corrosion condition of actual response, if set up Test database and Corrosion monitoring management system, timely statistics and analysis inspection
Data are surveyed, corrosion rate is specified；High sulfur-containing natural gas purifier raw material gas pipeline it is low-lying hold at liquid, unstripped gas torch emptying
Pipeline is low-lying to be held at liquid, at first grade absorption tower gas inlet pipeline elbow, first grade absorption tower rich amine solution be drawn to flash tank pipe
Line elbow, poor rich amine solution heat exchanger and its shell layer inlet/outlet pipeline, regenerator rich amine solution suction line elbow, regenerator bottom
Lean solution be drawn to poor rich liquid heat exchanger pipeline elbow, reboiler and its rich amine solution inlet/outlet pipeline, acid gas pipeline it is low-lying hold at liquid,
Acid gas torch blow-down pipe is low-lying to be held at liquid, molten sulfur to tail gas burning furnace degassing pipeline it is low-lying hold at liquid, dehydrating tower is exported to sudden strain of a muscle
Steaming pot richness TEG pipelines, the rich glycol side pipe line of rich or poor glycol heat exchanger, regenerator reboiler inlet/outlet pipeline, acid water heat exchange
Device to stripper pipeline, sour water stripping (SWS) tower top gas pipeline and chilling tower is extracted out at pipeline to chilling pump entrance, all should be set
Spot thickness measurement, its thickness of periodic measurement.
2. optimization method according to claim 1, it is characterised in that the step B carries out the excellent of process corrosion protection measure
Change specifically also includes：Strengthen the sampling analysis of Korrosionsmedium, the i.e. quantity to Korrosionsmedium sampling analysis point and position
Optimize, or increase or decrease or rearrange, and analyze data is rationally applied；Above-mentioned high sulfur-containing natural gas purification
Device carries out thermal-stable salt, catabolite, O in poor, rich amine solution2, p H values analysis, carry out the water quality point that amine liquid prepares water
Analysis, carries out regeneration overhead acidic aqueous media analysis, carries out CO in glycol2, H2S、O2, catabolite, the analysis of p H values.
3. optimization method according to claim 1, it is characterised in that the step B carries out the excellent of process corrosion protection measure
Change specifically also includes：Effectively the quality of control processing medium processing, reduces or avoids it to equipment and the corrosivity of pipeline；
Increase filtering and removing equipment in above-mentioned high sulfur-containing natural gas purifier amine liquid regenerative system, and add foam inhibiting agent, amine liquid supplement
Nitrogen-sealed is used in system；Increase filtering and removing equipment in glycol reclamation system, glycol, which is reclaimed, uses nitrogen in can system
Sealing；Steam generator continuously fills sodium phosphate, and adding amount is two tons annual.
4. optimization method according to claim 1, it is characterised in that the step B carries out the excellent of process corrosion protection measure
Change specifically also includes：Corrosion inhibiter effectively is used, whether using filling corrosion inhibiter corrosion is slowed down to device heavy corrosion position,
And effectively control the using effect of corrosion inhibiter；Corrosion inhibiter is filled in above-mentioned high sulfur-containing natural gas purifier rich amine solution system,
Fill corrosion inhibiter or fresh amine liquid in amine liquid regeneration overhead system, absorption tower bottom outlet richness glycol pipeline filling buffer or in
And agent.
5. optimization method according to claim 1, it is characterised in that the step C carries out the excellent of corrosion monitoring and detecting measure
Change specifically also includes：The online corrosion rate monitoring measure set on Improving Equipment and pipeline emphasis corrosion location, i.e., it is online
Rationally and the whether accurate actual corrosion condition of actual response of Monitoring Data whether quantity that corrosion monitoring is layouted and position, if builds
Vertical monitor database and corrosion monitoring management system, timely statistics and analysis Monitoring Data, specify corrosion rate；Contain in above-mentioned height
Sulphur purifying device for natural gas selexol process tower rich solution outlet, poor rich liquid heat exchanger/rich amine solution outlet, the backflow of amine regeneration overhead
Tank/acid gas outlet, amine regeneration overhead return tank/sour water outlet, the outlet of third level condensator outlet, hydrogenation reactor, acid water
Feed entrance, two grades of sulfur condenser entrances, chilling exit of pump, sewage stripping tower top, the outlet of final stage sulfur condenser, regenerators
Bottom reboiler gas returns pipeline and regeneration overhead return line, inductance all should be set to detect pin on the corrosion location, in real time prison
Survey its corrosion rate.
6. optimization method according to claim 1, it is characterised in that the step D carries out the conclusion point of corrosion failure case
Analysis specifically also includes：Whether corrosion failure case library and corrosion case management system are set up, and timely statistics and analysis detects number
According to clearly corroding cause of accident.
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| CN111826199A (en) * | 2020-07-21 | 2020-10-27 | 广东粤首新科技有限公司 | Hydrogenation device oil-soluble corrosion inhibitor and preparation method and application thereof |
| CN112347319A (en) * | 2020-10-27 | 2021-02-09 | 中国石油化工股份有限公司 | Analysis method and system for corrosion failure reasons of petrochemical equipment |
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