CN104034649B - A kind of flue gas of measuring is to the device of down-hole string corrosion rate and application thereof - Google Patents
A kind of flue gas of measuring is to the device of down-hole string corrosion rate and application thereof Download PDFInfo
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Abstract
The present invention relates to a kind of measure the flue gas device to down-hole string corrosion rate, including source of the gas portion, gas mixing unit and the reactor of simulation corrosive environment；Described source of the gas portion includes Nitrogen source gases, oxygen source, carbon dioxide air source；Described gas mixing unit includes mixing pressurized container；The reactor of described simulation corrosive environment include kettle, in kettle axially arranged experiment rotary part, drive the motor of described experiment rotary part, described experiment rotary part includes rotor and film hangers.The present invention can simulate the full-scale condition of down-hole string corrosion in note flue gas auxiliary thickened oil recovery, meets the test of flue gas corrosion at different conditions.
Description
Technical field
The present invention relates to a kind of flue gas of measuring to the device of down-hole string corrosion rate and application thereof, belong to oil-gas field development
Technical field.
Technical background
Note flue gas auxiliary thickened oil recovery is to improve crude output and the effective measures of ultimate recovery.Viscous crude is at world's oil gas
Occupying bigger ratio in resource, current heavy crude producing main method is that steam drives and steam soak, SAGD etc., existing steam
In oil displacement process, the flue gas of injection boiler is directly discharged in air, but actually flue gas may be used for the displacement of reservoir oil.Auxiliary at note flue gas
When helping thickened oil recovery, owing to flue gas containing CO2、O2、SO2Deng corrosive gas, inject well and producing well all can occur different journey
The corrosion of degree, even down-hole casing can be corroded perforation, cause huge economic loss, therefore, according to flue gas auxiliary viscous crude
Production practice technology, the influence factor of assay flue gas corrosion and the corrosion rate to down-hole string, auxiliary for improving flue gas
Help heavy oil development effect, it was predicted that down-hole string corrosion is significant.
Laboratory generally uses (i) formula (JB/T 7901. Uniform Corrosion Method of Laboratory Immersion Test method) to calculate
Flue gas corrosion speed:
In (i) formula: R-corrosion rate, mm/a；Sample mass before M-test, unit: g；M1Sample matter after-test
Amount, unit: g；The gross area of S-sample, unit: cm2；T-test period, unit: h；The density of D-material, unit: kg/m3。
The device using weight-loss method research corrosion at present is the most relatively simple, it is impossible to be used for simulating note flue gas auxiliary thickened oil recovery
The corrosivity of middle flue gas, inlet flue gas complicated component time in note flue gas auxiliary thickened oil recovery, containing the N of 80%-85%2, 10%-
The CO of 15%2, the O of 4%-6%2, also SO2、SO3, HCl etc., it is contemplated that the dissolution of gas, under laboratory condition, only root
According to Dalton's law (of partial pressures), it is impossible to the one-tenth of simulation down-hole multicomponent system is grouped into accurately.
Therefore, the most urgently develop a kind of simulation note flue gas that can be used in and assist the device of flue gas corrosion in thickened oil recovery
And method so that it is the true etching condition of down-hole string can be simulated, meet flue gas under different condition fast to down-hole string corrosion
The test of rate, to instruct the optimization design of note flue gas auxiliary thickened oil recovery Technology.
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of and measures the flue gas device to down-hole string corrosion rate.
The present invention also provides for utilizing said apparatus to measure the flue gas method to down-hole string corrosion rate.
Technical scheme is as follows:
A kind of measure the flue gas device to down-hole string corrosion rate, including source of the gas portion, gas mixing unit and simulation corrosion
The reactor of environment；
Described source of the gas portion includes Nitrogen source gases, oxygen source, carbon dioxide air source；
Described gas mixing unit includes mixing pressurized container；
The reactor of described simulation corrosive environment includes kettle, experiment rotary part axially arranged in kettle, driving
The motor of described experiment rotary part, described experiment rotary part includes that rotor and film hangers, described motor include rotating speed control
Device and magnetic drive device；The top of described kettle is provided with rubber gasket and ball valve；Described ball valve is vertically mounted on
The top of kettle, is packaged with rubber gasket on described ball valve；Design advantage herein is, to described kettle evacuation
After, to open ball valve, prevent air from revealing, recycling micro sample adding appliance syringe needle enters kettle through rubber gasket, in kettle
Add simulated flue gas composition, the moisture wherein comprised, SO2Etc. micro constitutent；
Described Nitrogen source gases is connected with mixing pressurized container by the first intake valve；Described oxygen source passes through the second air inlet
Valve is connected with mixing pressurized container；Described carbon dioxide air source is connected with mixing pressurized container by the 3rd intake valve；
The gas outlet of described mixing pressurized container is connected with the reactor air inlet of described simulation corrosive environment；
It is provided with vacuum pump and pressure on pipeline between the reactor of described mixing pressurized container and simulation corrosive environment
Power table；Described vacuum pump is connected with pipeline, and the most whole pipeline, with vacuum meter, extracts kettle, mixing increasing out before being used for testing
Air in pressure vessel and pipeline, eliminates the air impact on simulated flue gas composition；
It is provided with atmospheric valve, relief valve and vacuum meter between the reactor of described Pressure gauge and simulation corrosive environment；
It is provided with electric heating cover outside described kettle；
The outside of rotor is provided with cooling jacket；The magnetic drive device of described motor will really be used for the parts of stirring
It is sealed in pressure environment, thoroughly solves the reliability of movable sealing between shaft and reactor with this.Magnetic drive device
The basic material that manufactures be ferromagnetic material (ferrous alloy, nickel-base alloy), but there will be magnet loss phenomenon when high temperature, so
The outside corresponding at rotor magnetic material is provided with cooling jacket；
On the sidewall of described kettle, in kettle, it is respectively arranged with temperature sensor；The temperature arranged on described kettle sidewall
The temperature sensor arranged in degree sensor, kettle is connected with temperature measuring and controlling instrument respectively.
According to currently preferred, the supercharging pressure relief opening of described mixing pressurized container is provided with booster pump, water tank, in institute
State and be provided with lower drain valve and electro connecting pressure gauge between mixing pressurized container and booster pump.Described electro connecting pressure gauge is with mixed
Close pressurized container water side be connected, it is ensured that booster pump, mixing pressurized container composition pressure charging system supercharging time safe and reliable
Property, when the flue gas in mixing pressurized container is fully compressed to the reactor of simulation corrosive environment, and electro connecting pressure gauge can make
Booster pump power-off quits work, it is therefore prevented that the water side superpressure of mixing pressurized container.
According to currently preferred, described Nitrogen source gases has been sequentially arranged first on the pipeline mixed between pressurized container
Air relief valve, the first mass-flow gas meter and the first one way stop peturn valve；
Described oxygen source be sequentially arranged the second air relief valve, the second gas matter on the pipeline mixed between pressurized container
Amount effusion meter and the second one way stop peturn valve；
Described carbon dioxide air source has been sequentially arranged the 3rd air relief valve, the 3rd gas with on the pipeline mixed between pressurized container
Weight effusion meter and the 3rd one way stop peturn valve.
A kind of measure the flue gas method of work to the device of down-hole string corrosion rate, comprise the following steps that
(1) reference standard JB/T 7901. Uniform Corrosion Method of Laboratory Immersion Test method, by experiment to be measured
Down-hole string is processed into the sample to be tested meeting above-mentioned standard, and punches sample to be tested, measures the test of described sample to be tested
Front mass M；Sample to be tested is fixed on film hangers；
(2) film hangers is arranged on described rotor, then the reactor of simulation corrosive environment is sealed；
(3) by the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment, described vacuum meter
With the valve of the valve on pipeline and vacuum pump end is opened respectively between the reactor of simulation corrosive environment；
Open vacuum pump to described mixing pressurized container and kettle evacuation, close vacuum pump and at mixing pressurized container
And manage between the valve on pipeline, described vacuum meter and the reactor of simulation corrosive environment between the reactor of simulation corrosive environment
Valve on road and the valve of vacuum pump end；
(4) open ball valve, pass sequentially through the long syringe needle of micro sample adding appliance and pass caulking gum sheet, add simulated flue gas composition
Water and SO2Gas, closes ball valve after completing；
(5) nitrogen, oxygen and the amount of being separately added into of carbon dioxide and mixing gross pressure are preset, by nitrogen, oxygen and dioxy
Changing carbon and respectively enter mixing pressurized container, above-mentioned three road gas air inlets simultaneously, when the addition of nitrogen, oxygen and carbon dioxide reaches
During to default value, close the first intake valve, the second intake valve and the 3rd intake valve；Then booster pump is utilized to adjust mixing supercharging
Pressure in container, so that its pressure reaches default mixing gross pressure；The present invention utilizes booster pump in mixing pressurized container
Piston underside water filling, the gas on compression piston top, utilize Pressurization scheme preferred for this invention can solve bleed pressure not
During foot, the simulation of down-hole high pressure flue gas environment；
(6) close lower drain valve, open between the reactor of mixing pressurized container and simulation corrosive environment on pipeline
Valve, starts booster pump, the gaseous mixture displacement in mixing pressurized container is entered in kettle, completes distribution；After booster pump stops,
Close the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment, open and arrange under mixing pressurized container
Water valve；
(7), after distribution completes, start the electric heating cover outside kettle, kettle is heated, passes through Temperature Measure Control
It is experimental temperature that instrument arranges still body temperature；
(8) motor speed is set by rotational speed governor, is converted into, by rotating speed, the line that sample to be tested place radius is corresponding
The flowing velocity of medium in speed, i.e. simulation down-hole string；Open the cooling jacket outside rotor simultaneously；
(9) after the temperature in described kettle is increased to experimental temperature and stablizes, when pressure gauge reading is 12MPa, carry out
Cycle corrosion testing；
(10) after corrosion testing terminates, open atmospheric valve, kettle is vented, treats that still body temperature is reduced to less than 100 DEG C
Time, take out sample to be tested, the removing of reference standard GB/T 16545-1996. corrosion product, remove the corrosion on sample to be tested surface
Product, measures the mass M of sample to be tested1, according to (i) formula calculating corrosion rate:
In (i) formula: R-corrosion rate, mm/a；Sample to be tested quality before M-corrosion testing, unit: g；M1-corrosion examination
Sample to be tested quality after testing, unit: g；The total surface area of S-sample to be tested, unit: cm2；The T-corrosion testing time, unit:
h；The density of material of D-sample to be tested, unit: kg/m3。
According to currently preferred, in described step (4), add water 133mL, SO of simulated flue gas composition2Gas
8.3mL。
According to currently preferred, described step (5) is preset the addition of nitrogen, oxygen and carbon dioxide and is respectively N2:
132.8L、CO2: 33.8L, O2: 8.4L.
According to currently preferred, the experimental temperature in described step (7) is 120 DEG C.
According to currently preferred, described step (8) arranges motor speed 300r/min by rotational speed governor.By turning
The linear velocity that speed is converted into sample place radius corresponding is about 3m/s, gets final product flowing velocity 3m/s of indirect analog medium.
According to currently preferred, described three tunnel gas handling systems, all it is connected, according to N in flue gas with mixing pressurized container2、
CO2And O2The difference of content, N2Mass flowmenter 3 traffic profile of road air inlet is 5SLM, CO2The mass flowmenter 8 of road air inlet flows
Gauge lattice are 1SLM, O2Mass flowmenter 13 traffic profile of road air inlet is 200SCCM.Wherein SLM (Standard Liter
Per Minute) it is to represent standard liter per minute；SCCM (Standard Cubic Centimeter per Minute) is table
Show standard milliliters per minute.
It is an advantage of the current invention that:
The invention provides a kind of flue gas of measuring to the device of down-hole string corrosion rate and application thereof.Advantages of the present invention
Being the distribution mixing pressure charging system of device, the one-tenth that can simulate note flue gas down-hole multicomponent system accurately is grouped into, pressure, temperature
Can also reach to note the parameter of flue gas, the flox condition of note flue gas can also be simulated simultaneously.By simulating the reality of down-hole string
Corrosive environment, can measure the flue gas corrosion rate to down-hole string under different condition.
Accompanying drawing explanation
Accompanying drawing 1 is that the present invention measures the flue gas structural representation to the device of down-hole string corrosion rate；
In FIG,
1, Nitrogen source gases；2, the first air relief valve；3, the first mass-flow gas meter；4, the first intake valve；5, first is unidirectional
Check-valves；
6, oxygen source；7, the second air relief valve；8, the second mass-flow gas meter；9, the second intake valve；10, second is unidirectional
Check-valves；
11, carbon dioxide air source；12, the 3rd air relief valve；13, the 3rd mass-flow gas meter；14, the 3rd intake valve；15、
3rd one way stop peturn valve；
16, mixing pressurized container；17, booster pump；18, electro connecting pressure gauge；19, lower drain valve；20, water tank；
21, vacuum pump；22, the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment；23、
Pressure gauge；24, atmospheric valve；25, relief valve；26, vacuum meter；27, between the reactor of described vacuum meter and simulation corrosive environment
Valve on pipeline；28, the valve of vacuum pump end；29, the temperature sensor arranged on kettle sidewall；30, arrange in kettle
Temperature sensor；31, temperature measuring and controlling instrument；32, motor；33, rotational speed governor；34, magnetic drive device；35, cooling water
Set；36, rubber gasket；37, ball valve；38, rotor；39, film hangers；40, the reactor of corrosive environment is simulated；41, electrical heating
Set.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in detail, but is not limited to this.
As shown in Figure 1.
Embodiment 1,
A kind of measure the flue gas device to down-hole string corrosion rate, including source of the gas portion, gas mixing unit and simulation corrosion
The reactor 40 of environment；
Described source of the gas portion includes Nitrogen source gases 1, oxygen source 6, carbon dioxide air source 11；
Described gas mixing unit includes mixing pressurized container 16；
The reactor 40 of described simulation corrosive environment includes kettle, experiment rotary part axially arranged in kettle, drives
The motor 32 of dynamic described experiment rotary part, described experiment rotary part includes that rotor 38 and film hangers 39, described motor 32 wrap
Include rotational speed governor 33 and magnetic drive device 34；The top of described kettle is provided with rubber gasket and ball valve；Described
Ball valve is vertically mounted on the top of kettle, is packaged with rubber gasket on described ball valve；
Described Nitrogen source gases 1 is connected with mixing pressurized container 16 by the first intake valve 4；Described oxygen source 6 is by the
Two intake valves 9 are connected with mixing pressurized container 16；Described carbon dioxide air source 11 is held with mixing supercharging by the 3rd intake valve 14
Device 16 is connected；
The gas outlet of described mixing pressurized container 16 is connected with reactor 40 air inlet of described simulation corrosive environment；
It is provided with vacuum pump on pipeline between the reactor 40 of described mixing pressurized container 16 and simulation corrosive environment
21 and Pressure gauge 23；
Atmospheric valve 24, relief valve 25 and true it is provided with between the reactor 40 of described Pressure gauge 23 and simulation corrosive environment
Empty table 26；
Electric heating cover 41 it is provided with outside described kettle；
The outside of rotor 38 is provided with cooling jacket 35；
Temperature sensor 30 it is provided with in the sidewall of described kettle is provided with temperature sensor 29, kettle；Described still
The temperature sensor, the interior temperature sensor arranged of kettle that arrange on body sidewall are connected with temperature measuring and controlling instrument 31 respectively.
The supercharging pressure relief opening of described mixing pressurized container 16 is provided with booster pump 17, water tank 20, in described mixing supercharging
Lower drain valve 19 and electro connecting pressure gauge 18 it is provided with between container 16 and booster pump 17.
Embodiment 2,
As described in Example 1 a kind of measuring the flue gas device to down-hole string corrosion rate, its difference is, described nitrogen
Gas source of the gas 1 be sequentially arranged first air relief valve the 2, first mass-flow gas meter 3 on the pipeline mixed between pressurized container 16
With the first one way stop peturn valve 5；
Described oxygen source 6 be sequentially arranged second air relief valve the 7, second gas on the pipeline mixed between pressurized container 16
Weight effusion meter 8 and the second one way stop peturn valve 10；
Described carbon dioxide air source 11 be sequentially arranged on the pipeline mixed between pressurized container 16 the 3rd air relief valve 12,
3rd mass-flow gas meter 13 and the 3rd one way stop peturn valve 15.
Embodiment 3,
A kind of measurement flue gas method of work to the device of down-hole string corrosion rate as described in Example 1, including step
As follows:
(1) reference standard JB/T 7901. Uniform Corrosion Method of Laboratory Immersion Test method, by experiment to be measured
Down-hole string is processed into the sample to be tested meeting above-mentioned standard, and punches sample to be tested, measures the test of described sample to be tested
Front mass M；Sample to be tested is fixed on film hangers；
(2) film hangers is arranged on described rotor, then the reactor of simulation corrosive environment is sealed；
(3) by the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment, described vacuum meter
With the valve of the valve on pipeline and vacuum pump end is opened respectively between the reactor of simulation corrosive environment；
Open vacuum pump to described mixing pressurized container and kettle evacuation, close vacuum pump and at mixing pressurized container
And manage between the valve on pipeline, described vacuum meter and the reactor of simulation corrosive environment between the reactor of simulation corrosive environment
Valve on road and the valve of vacuum pump end；
(4) open ball valve, pass sequentially through the long syringe needle of micro sample adding appliance and pass caulking gum sheet, add simulated flue gas composition
Water and SO2Gas, closes ball valve after completing；
(5) nitrogen, oxygen and the amount of being separately added into of carbon dioxide and mixing gross pressure are preset, by Nitrogen source gases, oxygen gas
Source and carbon dioxide air source respectively enter mixing pressurized container, and above-mentioned three road gas air inlets simultaneously, when nitrogen, oxygen and titanium dioxide
When the addition of carbon reaches default value, close the first intake valve, the second intake valve and the 3rd intake valve；Then booster pump is utilized
Adjust the pressure in mixing pressurized container, so that its pressure reaches default mixing gross pressure；
(6) close lower drain valve, open between the reactor of mixing pressurized container and simulation corrosive environment on pipeline
Valve, starts booster pump, the gaseous mixture displacement in mixing pressurized container is entered in kettle, completes distribution；After booster pump stops,
Close the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment, open and arrange under mixing pressurized container
Water valve；
(7), after distribution completes, start the electric heating cover outside kettle, kettle is heated, passes through Temperature Measure Control
It is experimental temperature that instrument arranges still body temperature；
(8) motor speed is set by rotational speed governor, is converted into, by rotating speed, the line that sample to be tested place radius is corresponding
The flowing velocity of medium in speed, i.e. simulation down-hole string；Open the cooling jacket outside rotor simultaneously；
(9) after the temperature in described kettle is increased to experimental temperature and stablizes, when pressure gauge reading is 12MPa, carry out
Cycle corrosion testing；
(10) after corrosion testing terminates, open atmospheric valve, kettle is vented, treats that still body temperature is reduced to less than 100 DEG C
Time, take out sample to be tested, the removing of reference standard GB/T 16545-1996. corrosion product, remove the corrosion on sample to be tested surface
Product, measures the mass M of sample to be tested1, according to (i) formula calculating corrosion rate:
In (i) formula: R-corrosion rate, mm/a；Sample to be tested quality before M-corrosion testing, unit: g；M1-corrosion examination
Sample to be tested quality after testing, unit: g；The total surface area of S-sample to be tested, unit: cm2；The T-corrosion testing time, unit:
h；The density of material of D-sample to be tested, unit: kg/m3。
Embodiment 4,
Assume note flue gas auxiliary thickened oil recovery in down-hole string corrosion canonical parameter be: temperature 120 DEG C, pressure 12MPa,
Flow velocity 3m/s.If injecting the composition of flue gas: N2-80%, CO2-15%, O2-5%, water content 1%, SO2-50ppm。
The reactor volume size of simulation corrosive environment is 2L, according to corrosion parameter and smoke components, utilizes dalton to divide
Compression set rule and The Ideal-Gas Equation, be calculated the addition under each ingredient standard situation: N2-132.8L (the status of criterion
Under), CO2-33.8L (under the status of criterion), O2-8.4L (under the status of criterion), H2O-133mL、SO2-8.3mL。
Method of work as described in Example 3, in described step (4), adds water 133mL, SO of simulated flue gas composition2Gas
Body 8.3mL.
Described step (5) is preset the addition of nitrogen, oxygen and carbon dioxide and is respectively N2: 132.8L, CO2: 33.8L,
O2: 8.4L.
Experimental temperature in described step (7) is 120 DEG C.
Described step (8) arranges motor speed 300r/min by rotational speed governor.It is converted into sample place by rotating speed
The linear velocity that radius is corresponding is about 3m/s, gets final product flowing velocity 3m/s of indirect analog medium.
Described three tunnel gas handling systems, are all connected, according to N in flue gas with mixing pressurized container2、CO2And O2The difference of content,
N2Mass flowmenter 3 traffic profile of road air inlet is 5SLM, CO2Mass flowmenter 8 traffic profile of road air inlet is 1SLM, O2Road
Mass flowmenter 13 traffic profile of air inlet is 200SCCM.Wherein SLM (Standard Liter per Minute) is to represent
Standard liter per minute；SCCM (Standard Cubic Centimeter per Minute) is to represent standard milliliters per minute.
Claims (8)
1. measure the flue gas device to down-hole string corrosion rate for one kind, it is characterised in that this device includes that source of the gas portion, gas mix
Conjunction portion and the reactor of simulation corrosive environment；
Described source of the gas portion includes Nitrogen source gases, oxygen source, carbon dioxide air source；
Described gas mixing unit includes mixing pressurized container；
The reactor of described simulation corrosive environment includes described in kettle, experiment rotary part axially arranged in kettle, driving
Experiment rotary part motor, described experiment rotary part include rotor and film hangers, described motor include rotational speed governor and
Magnetic drive device；The top of described kettle is provided with rubber gasket and ball valve；Described ball valve is vertically mounted on kettle
Top, described ball valve is packaged with rubber gasket；
Described Nitrogen source gases is connected with mixing pressurized container by the first intake valve；Described oxygen source by the second intake valve with
Mixing pressurized container is connected；Described carbon dioxide air source is connected with mixing pressurized container by the 3rd intake valve；
The gas outlet of described mixing pressurized container is connected with the reactor air inlet of described simulation corrosive environment；
It is provided with vacuum pump and Pressure gauge on pipeline between the reactor of described mixing pressurized container and simulation corrosive environment；
It is provided with atmospheric valve, relief valve and vacuum meter between the reactor of described Pressure gauge and simulation corrosive environment；
It is provided with electric heating cover outside described kettle；
The outside of rotor is provided with cooling jacket；
On the sidewall of described kettle, in kettle, it is respectively arranged with temperature sensor；The temperature arranged on described kettle sidewall passes
The temperature sensor arranged in sensor, kettle is connected with temperature measuring and controlling instrument respectively.
The most according to claim 1 a kind of measure the flue gas device to down-hole string corrosion rate, it is characterised in that described
The supercharging pressure relief opening of mixing pressurized container is provided with booster pump, water tank, sets between described mixing pressurized container and booster pump
It is equipped with lower drain valve and electro connecting pressure gauge.
The most according to claim 1 a kind of measure the flue gas device to down-hole string corrosion rate, it is characterised in that described
Nitrogen source gases be sequentially arranged the first air relief valve, the first mass-flow gas meter and on the pipeline mixed between pressurized container
One one way stop peturn valve；
Described oxygen source be sequentially arranged the second air relief valve, the second gas mass flow on the pipeline mixed between pressurized container
Gauge and the second one way stop peturn valve；
Described carbon dioxide air source has been sequentially arranged the 3rd air relief valve, the 3rd gas matter with on the pipeline mixed between pressurized container
Amount effusion meter and the 3rd one way stop peturn valve.
4. the measurement flue gas method of work to the device of down-hole string corrosion rate as described in as any one in claim 1-3,
It is characterized in that, it is as follows that the method comprising the steps of:
(1) reference standard JB/T 7901. Uniform Corrosion Method of Laboratory Immersion Test method, by the down-hole of experiment to be measured
Tubing string is processed into the sample to be tested meeting above-mentioned standard, and punches sample to be tested, measures the test antecedent of described sample to be tested
Amount M；Sample to be tested is fixed on film hangers；
(2) film hangers is arranged on described rotor, then the reactor of simulation corrosive environment is sealed；
(3) by valve, described vacuum meter and the mould on pipeline between the reactor of mixing pressurized container and simulation corrosive environment
The valve intended between the reactor of corrosive environment on pipeline and the valve of vacuum pump end are opened respectively；
Open vacuum pump to described mixing pressurized container and kettle evacuation, close vacuum pump and at mixing pressurized container and mould
Between the valve intended between the reactor of corrosive environment on pipeline, described vacuum meter and the reactor of simulation corrosive environment on pipeline
Valve and the valve of vacuum pump end；
(4) open ball valve, pass sequentially through the long syringe needle of micro sample adding appliance through caulking gum sheet, add simulated flue gas composition water and
SO2Gas, closes ball valve after completing；
(5) nitrogen, oxygen and the amount of being separately added into of carbon dioxide and mixing gross pressure are preset, by nitrogen, oxygen and carbon dioxide
Respectively enteing mixing pressurized container, above-mentioned three road gas air inlets simultaneously, when the addition of nitrogen, oxygen and carbon dioxide reaches pre-
If during numerical value, close the first intake valve, the second intake valve and the 3rd intake valve；Then booster pump is utilized to adjust mixing pressurized container
Interior pressure, so that its pressure reaches default mixing gross pressure；
(6) close lower drain valve, open the valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment,
Start booster pump, the gaseous mixture displacement in mixing pressurized container is entered in kettle, completes distribution；After booster pump stops, closing
The valve on pipeline between the reactor of mixing pressurized container and simulation corrosive environment, opens draining under mixing pressurized container
Valve；
(7), after distribution completes, start the electric heating cover outside kettle, kettle is heated, is set by temperature measuring and controlling instrument
Putting still body temperature is experimental temperature；
(8) motor speed is set by rotational speed governor, is converted into, by rotating speed, the linear velocity that sample to be tested place radius is corresponding,
The i.e. flowing velocity of medium in simulation down-hole string；Open the cooling jacket outside rotor simultaneously；
(9) after the temperature in described kettle is increased to experimental temperature and stablizes, when pressure gauge reading is 12MPa, the cycle is carried out
Corrosion testing；
(10) after corrosion testing terminates, open atmospheric valve, kettle is vented, when still body temperature is reduced to below 100 DEG C, takes
Go out sample to be tested, the removing of reference standard GB/T 16545-1996. corrosion product, remove the corrosion product on sample to be tested surface,
Measure the mass M of sample to be tested1, according to (i) formula calculating corrosion rate:
In (i) formula: R-corrosion rate, mm/a；Sample to be tested quality before M-corrosion testing, unit: g；M1After-corrosion testing
Sample to be tested quality, unit: g；The total surface area of S-sample to be tested, unit: cm2；The T-corrosion testing time, unit: h；D-
The density of material of sample to be tested, unit: kg/m3。
The measurement flue gas the most according to claim 4 method of work to the device of down-hole string corrosion rate, described step
(4), in, water 133mL, SO of simulated flue gas composition is added2Gas 8.3mL.
The measurement flue gas the most according to claim 4 method of work to the device of down-hole string corrosion rate, described step
(5) addition presetting nitrogen, oxygen and carbon dioxide is respectively N2: 132.8L, CO2: 33.8L, O2: 8.4L.
The measurement flue gas the most according to claim 4 method of work to the device of down-hole string corrosion rate, described step
(7) experimental temperature in is 120 DEG C.
The measurement flue gas the most according to claim 4 method of work to the device of down-hole string corrosion rate, described step
(8) motor speed 300r/min is set by rotational speed governor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188271.4A CN104034649B (en) | 2014-05-06 | A kind of flue gas of measuring is to the device of down-hole string corrosion rate and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188271.4A CN104034649B (en) | 2014-05-06 | A kind of flue gas of measuring is to the device of down-hole string corrosion rate and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104034649A CN104034649A (en) | 2014-09-10 |
| CN104034649B true CN104034649B (en) | 2016-11-30 |
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