CN202471565U - High temperature and high pressure H2S/CO2 corrosion reaction device capable of realizing dynamic electrochemical test - Google Patents
High temperature and high pressure H2S/CO2 corrosion reaction device capable of realizing dynamic electrochemical test Download PDFInfo
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- CN202471565U CN202471565U CN201220094880XU CN201220094880U CN202471565U CN 202471565 U CN202471565 U CN 202471565U CN 201220094880X U CN201220094880X U CN 201220094880XU CN 201220094880 U CN201220094880 U CN 201220094880U CN 202471565 U CN202471565 U CN 202471565U
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Abstract
The utility model discloses a high temperature and high pressure H2S/CO2 corrosion reaction device capable of realizing dynamic electrochemical test, solving the problem that proper reaction devices for carrying out real-time measurement of electrochemical parameters in the corrosion process under the high temperature and high pressure dynamic condition do not exist to study the H2S/CO2 corrosion system. The reaction device comprises a corrosion reaction vessel, a heating and constant temperature device, a gas boosting system and a dynamic electrochemical test system. The reaction device has the following beneficial effects: dynamic accuracy control of medium temperature, pressure and flow velocity in the corrosion reaction vessel can be realized; a built-in corrosion coupon plate can realize that a plurality of corrosion coupons work stably for a long time under the dynamic rotation condition; the high temperature and high pressure three-electrode electrochemical test system can realize real-time electrochemical test of the dynamic corrosion process of the materials in the reaction device under the high temperature and high pressure strong corrosion medium condition while carrying out the weight loss experiment of the corrosion coupons; and favorable guarantees are provided for further study of the H2S/CO2 corrosion system.
Description
Technical field
The utility model relates to the high temperature pressure corrosion reaction unit, is specifically related to a kind of HTHP H that integrates corrosion coupon weightless test and dynamic electro-chemical test
2S/CO
2The corrosion reaction device.
Background technology
H
2S and CO
2Corrosion is a kind of common corrosion type in the World Oil Industry, also is one of the development of puzzlement various countries oil and gas industry very distinct issues.The oil gas field that China has developed at present in various degree contain H
2S, CO
2Gas, the content that has is high, like Sichuan oilfield, North China Oilfield, oil field, Tarim Basin etc.For many years, H
2S, CO
2Often one or more composition coexistences, and corrosive component are content rising, temperature and the big trend of pH value fluctuation always, cause the various corrosion failure probability of oil-gas gathering and transportation line equipment to increase.Moreover H
2S is a kind of huge poisonous gas, H in the air
2S content surpasses 300ppm will cause danger to life.The corrosion and the safety problem that cause thus are even more serious, not only cause pipeline to lose efficacy, stop production, and also can cause casualties and serious environmental pollution, have become the important topic that needs to be resolved hurrily in oil field and oil pipe production design department.
Say H from corrosion mechanism
2S and CO
2Corrosion process be a kind of complicated chemistry or electrochemical process, influence factor is very complicated, people still are difficult to formulate targetedly the protection countermeasure of corrosion so far.In numerous corrosion influence factors, temperature, dividing potential drop and flow velocity are to generally acknowledge to influence H
2S and CO
2The topmost factor of corrosion process.Adopt the corrosion behavior and the mechanism of lacing film corrosion weight loss and surperficial product analysis technical research Oil Tube Steel to have many limitation.And electro-chemical test and analytical technology have the advantage of many uniquenesses, so the real-time online Electrochemical Measurement Technology of simulated oil gas well work condition environment more and more comes into one's own.If can set up a kind of effective HTHP H
2S/CO
2The corrosion reaction device carries out Study on Regularity to its influence factor and mechanism, we can say to be prevention oil-gas pipeline H
2S/CO
2The corrosion and provide effective safeguard procedures to indicate direction.
From present research situation, for H
2S/CO
2The systematic study of corrosion influence factor and mechanism is very few, and its one of the main reasons is exactly to lack the effectively HTHP H of ability simulation oil field actual condition
2S/CO
2The corrosion reaction device.Conventional high-temperature high-pressure reaction kettle can be realized the control of chemical reaction process under specified temp and the pressure, also has to be used for extremely individually replacing to make the high temperature pressure corrosion reaction vessel, but after all the function difference of essence is arranged with the corrosion reaction device.Moreover; Detailed process that corrosion takes place and electrochemical mechanism are essential for the research corrosion mechanism; Common high-temperature high-pressure reaction kettle can only realize corrosion coupon before reaction with reaction back sample before and after the difference of weight loss, then can't obtain for the vital corrosion process of corrosion sample in reaction vessel.U.S. Cortest company produces high-temperature high-pressure reaction kettle specialized factory few in number, and the enterprise of domestic production similar products is very few, and all can not realize the electrochemical measurement of corrosion process in the high temperature and high pressure environment at present.Electro-chemical test under the HTHP, main problem are to select and encapsulate suitable high temperature contrast electrode, guarantee its stabilizing effective work under high-temperature and high-pressure conditions, at present domesticly do not address this problem preferably as yet.Therefore, the real-time measurement of enforcement corrosion process electrochemical parameter is research H under the HTHP dynamic condition
2S/CO
2The important problem that corrosion system need solve.Do not relate to the HTHP H that can realize dynamic electro-chemical test in the prior art as yet
2S/CO
2The corrosion reaction device.
Summary of the invention
The purpose of the utility model is to provide a kind of HTHP H that realizes dynamic electro-chemical test
2S/CO
2The corrosion reaction device, device is at HTHP strong corrosive medium H
2S/CO
2Under the existence condition, reached the purpose that the corrosion dynamic process carries out real-time electrochemical measurement has been taken place material.
For realizing the foregoing invention purpose, the technical scheme that the application adopts is: the HTHP H that can realize dynamic electro-chemical test
2S/CO
2The corrosion reaction device comprises corrosion reaction container, heating and thermostat, gas pressurization system and dynamic electro-chemical test system; Described corrosion reaction container comprises tank body and top cover, adopts bolt seals to be fixedly connected between tank body and the top cover; The mounting disc of tank body internal fixation corrosion sample lacing film is provided with magnetic stirring apparatus on the tank body; The duct that is communicated with tank interior is set on the sidewall of top cover, the threeway pipeline is installed on this duct, two interfaces in addition of threeway pipeline are respectively H
2S and CO
2Inlet, on the sidewall of top cover, also be provided with the duct that another and corrosion reaction internal tank are connected, this duct is connected to gas exhaust and relief valve device;
Said heating and thermostat comprise cooling water pipe, heating element and heat insulation layer structure, and concrete is that the outer wall of being close to the corrosion reaction tank body of container is provided with cooling water coil, around tank wall electrical heating elements is set, and at the outermost layer of tank body heat insulation layer structure are set;
Described gas pressurization system is made up of air compressor and gas supercharge pump, and pipeline is connected H between air compressor and the gas boosting pump
2S and CO
2The outlet of gas cylinder is the inlet of pipeline connection gas boosting pump respectively, and gas boosting delivery side of pump correspondence is connected to the H of corrosion reaction container
2S and CO
2Inlet;
Described dynamic electro-chemical test system; Comprise that temperature sensor inserts hole, built-in HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode; Offer the access hole of temperature sensor, HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode on the corrosion reaction container cap respectively; Temperature sensor, HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode are linked into the corrosion reaction internal tank through the access hole of correspondence, and each inserts between hole and sensor and each electrode seal is set.
The mounting disc of above-mentioned corrosion sample lacing film is discoideus, and circumference has at least 12 lacing film holes in the mounting disc upper edge, is used to install corrosion coupon.
The beneficial effect of the utility model is mainly reflected in following aspect:
1, corrosion reaction container work temperature of the present invention is 0-350 ℃, working pressure 0-25MPa.Corrosion reaction container body and corrosive medium contact material are Hastelloy (Hastelloy-276), can satisfy H
2S/CO
2The job requirement of strong corrosive medium HTHP;
2, corrosion reaction device of the present invention is equipped with magnetic stirring apparatus (rotating speed 0-1550r/min), but the dynamic control of realization response container inner medium flow velocity, and built-in corrosion coupon dish and anchor clamps can be realized many group lacing films long-term stable operation under dynamic rotation condition;
3, corrosion reaction device of the present invention can be realized the accurate control of temperature heating and constant temperature (＜± 2 degree); Heating of temperature controller controlling resistance silk and the cooling of solenoid control cooling water coil; Change in the past only by the resistance wire heating and cooling; The drawback that waste heat excessive temperature deviation is too high, functions such as heating power supply are reported to the police, cut off automatically to realization overtemperature, superpressure;
4, corrosion reaction device of the present invention is equipped with air compressor gas driving supercharge pump, but the pressure of realization response container reaction gases is regulated immediately.And is furnished with H
2S detecting device (resolution 0.1ppm) and digital display alarm instrument, automatic sound-light alarm when gas concentration surpasses alarm setting value;
5, corrosion reaction device overhead opening of the present invention is suitably eccentric; One side is convenient to install HTHP three electrode test systems; Electrode has characteristics such as Heat stability is good, response time weak point, good reversibility; Can steady operation in high temperature and high pressure environment, realize the electro-chemical test of dynamic corrosion process.
Description of drawings
Fig. 1 is the corrosion reaction device synoptic diagram of the utility model.
Fig. 2 is the cross-sectional view of the corrosion reaction container of the utility model.
Fig. 3 is the vertical view of top cover.
Fig. 4 is the structural representation of corrosion sample lacing film mounting disc.
Embodiment
Below in conjunction with accompanying drawing the application is further described:
By Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4: the HTHP H that can realize dynamic electro-chemical test
2S/CO
2The corrosion reaction device comprises corrosion reaction container 1, heating and thermostat 2, gas pressurization system 3 and dynamic electro-chemical test system 4; Described corrosion reaction container 1 comprises tank body and top cover, adopts bolt to connect between tank body and the top cover; Tank body internal fixation corrosion sample lacing film mounting disc 13, corrosion sample lacing film mounting disc 13 is discoideus, has at least 12 lacing film holes at mounting disc 13 upper edge circumference, is used to install corrosion coupon; Magnetic stirring apparatus 5 is set on the tank body, but the dynamic control of velocity of medium in the realization response container 1, and built-in corrosion sample lacing film mounting disc 13 can realize many group corrosion coupons long-term stable operation under dynamic rotation condition; The duct that is communicated with tank interior is set on the sidewall of top cover, the threeway pipeline is installed on this duct, two interfaces in addition of threeway pipeline are respectively H
2S and CO
2Inlet 10; On the sidewall of top cover, also be provided with the duct of another and reaction vessel 1 internal switching, this duct is connected to gas exhaust and relief valve device 14, is used for exhaust and safe unloading pressure.Can bear working temperature 0-350 ℃ in the reaction vessel 1, working pressure 0-25Mpa, reaction vessel 1 main body reaches and the material of corrosive medium contact component is Hastelloy (Hastelloy-276), satisfies H
2S/CO
2The job requirement of strong corrosive medium HTHP.According to requirements of one's work; The bottom of above-mentioned corrosion reaction container 1 is provided with support component; And jacking gear 15 is set in its side; This jacking gear 15 is used for fixing magnetic stirring apparatus and its height of convenient adjustment on the one hand, is used for fixing the corrosion reaction container cap on the other hand and adjusts the height that it is opened, goes up and down.
At heating of reaction vessel 1 tank body arranged around and thermostat 2; Said heating and thermostat 2 comprise cooling water pipe 12, heating element 11 and insulation construction; Concrete is that the outer wall of being close to tank body is provided with cooling water coil 12; Around tank wall electrical heating elements 11 is set, heating element 11 by several groups needless to say the resistance wire of power guarantee homogeneous heating around forming; Cooling water coil 12 and heating element 11 keep the distance of 0.5 cm, in experimentation, play cooling and constant temperature function; Described insulation construction is that the outermost layer at tank body is provided with heat-insulation layer, and heat-insulation layer is processed by refractory brick, fire-resistant asbestos.
Described gas pressurization system 3 is made up of air compressor and gas supercharge pump, and pipeline is connected H between air compressor and the gas boosting pump
2S and CO
2The outlet of gas cylinder is the inlet of pipeline connection gas boosting pump respectively, and the gas boosting delivery side of pump is passed into reaction vessel 1 inside; Air compressor gas driving supercharge pump is installed, but the pressure of realization response container reaction gases is regulated immediately.
Described dynamic electro-chemical test system 4; Comprise (300 ℃ of temperature sensor 6, built-in HTHP Ag/AgC contrast electrodes; 35Mpa) 7, auxiliary platinum electrode 8 of HTHP and HTHP working electrode 9; Offer on reaction vessel 1 top cover and offer temperature sensor 6, HTHP Ag/AgC contrast electrode 7, the auxiliary platinum electrode 8 of HTHP and HTHP working electrode 9 access holes respectively; Temperature sensor 6, HTHP Ag/AgC contrast electrode 7, the auxiliary platinum electrode 8 of HTHP and HTHP working electrode 9 insert through each self-corresponding access hole respectively; Each inserts between hole and sensor and each electrode seal is set, and guarantees the sealing property of reaction vessel 1 under high-temperature and high-pressure conditions.This system also comprises temperature controller; Temperature controller is according to the transmission signal of temperature sensor 6; Regulate resistance wire heating power and solenoid valve and open and close degree; Cooling water flow in the control cooling water coil, accurately control of the constant temperature in the realization response container (＜± 2 degree), and be provided with overtemperature, functions such as heating power supply are reported to the police, cut off automatically to superpressure.
Claims (2)
1. can realize the HTHP H of dynamic electro-chemical test
2S/CO
2The corrosion reaction device comprises corrosion reaction container, heating and thermostat, gas pressurization system and dynamic electro-chemical test system; It is characterized in that: described corrosion reaction container comprises tank body and top cover, adopts bolt seals to be fixedly connected between tank body and the top cover; The mounting disc of tank body internal fixation corrosion sample lacing film is provided with magnetic stirring apparatus on the tank body; The duct that is communicated with tank interior is set on the sidewall of top cover, the threeway pipeline is installed on this duct, two interfaces in addition of threeway pipeline are respectively H
2S and CO
2Inlet, on the sidewall of top cover, also be provided with the duct that another and corrosion reaction internal tank are connected, this duct is connected to gas exhaust and relief valve device;
Said heating and thermostat comprise cooling water pipe, heating element and heat insulation layer structure, and concrete is that the outer wall of being close to the corrosion reaction tank body of container is provided with cooling water coil, around tank wall electrical heating elements is set, and at the outermost layer of tank body heat insulation layer structure are set;
Described gas pressurization system is made up of air compressor and gas supercharge pump, and pipeline is connected H between air compressor and the gas boosting pump
2S and CO
2The outlet of gas cylinder is the inlet of pipeline connection gas boosting pump respectively, and gas boosting delivery side of pump correspondence is connected to the H of corrosion reaction container
2S and CO
2Inlet;
Described dynamic electro-chemical test system; Comprise that temperature sensor inserts hole, built-in HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode; Offer the access hole of offering temperature sensor, HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode respectively on the corrosion reaction container cap; Temperature sensor, HTHP Ag/AgC contrast electrode, the auxiliary platinum electrode of HTHP and HTHP working electrode are linked into the corrosion reaction internal tank through the access hole of correspondence, and each inserts between hole and sensor and each electrode seal is set.
2. the HTHP H that realizes dynamic electro-chemical test according to claim 1
2S/CO
2The corrosion reaction device is characterized in that: the mounting disc of corrosion sample lacing film is discoideus, and circumference has at least 12 lacing film holes in the mounting disc upper edge, on the lacing film hole, corrosion coupon is installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220094880XU CN202471565U (en) | 2012-03-14 | 2012-03-14 | High temperature and high pressure H2S/CO2 corrosion reaction device capable of realizing dynamic electrochemical test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220094880XU CN202471565U (en) | 2012-03-14 | 2012-03-14 | High temperature and high pressure H2S/CO2 corrosion reaction device capable of realizing dynamic electrochemical test |
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|---|---|
| CN202471565U true CN202471565U (en) | 2012-10-03 |
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|---|---|---|---|
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| CN103018155A (en) * | 2012-12-20 | 2013-04-03 | 中国石油天然气股份有限公司 | Multifunctional non-metallic pipe simulative detection system |
| CN103487364A (en) * | 2013-07-23 | 2014-01-01 | 西安石油大学 | Testing apparatus and testing method for dynamic corrosion of multiple groups of mediums |
| CN103712905A (en) * | 2013-12-25 | 2014-04-09 | 中国石油大学(华东) | Experimental system for supplementing trace impurity in high-temperature high-pressure experiment |
| CN104034649A (en) * | 2014-05-06 | 2014-09-10 | 中国石油大学(华东) | Apparatus for measuring corrosion rate of down-hole string by flue gas, and its application |
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| CN104535486A (en) * | 2015-01-12 | 2015-04-22 | 国家电网公司 | Automatic measuring device and method for anti-corrosion performance of oil used for electric power |
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| CN106323850A (en) * | 2016-08-15 | 2017-01-11 | 中国石油天然气集团公司 | Device and method for evaluating corrosion resistance of inner coating of drill pipe |
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| CN104165835A (en) * | 2013-05-15 | 2014-11-26 | 中石化洛阳工程有限公司 | Evaluation method for low temperature corrosion of refinery |
| CN104237112B (en) * | 2013-06-19 | 2018-01-02 | 鞍钢股份有限公司 | A kind of experimental rig of test material resistant to sulfuric acid dew point corrosion |
| CN104237112A (en) * | 2013-06-19 | 2014-12-24 | 鞍钢股份有限公司 | Device for testing sulfuric acid dew point corrosion resistance of material |
| CN103487364A (en) * | 2013-07-23 | 2014-01-01 | 西安石油大学 | Testing apparatus and testing method for dynamic corrosion of multiple groups of mediums |
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| CN108918402A (en) * | 2018-06-12 | 2018-11-30 | 中国船舶重工集团公司第七二五研究所 | A kind of high temperature and pressure galvanic corrosion experimental rig |
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| CN111024604A (en) * | 2019-12-19 | 2020-04-17 | 韦正楠 | Corrosion and scaling experiment detection system and method for geothermal water heat exchange process |
| CN111470580A (en) * | 2020-04-07 | 2020-07-31 | 天津大学 | Electrochemical reaction system capable of exploring corrosion of tap water pipe wall and microbial growth |
| CN111678860A (en) * | 2020-07-21 | 2020-09-18 | 中国海洋石油集团有限公司 | High-temperature high-pressure corrosion electrochemical testing device with controllable corrosion environment and testing method |
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Granted publication date: 20121003 Termination date: 20140314 |