CN202974789U - Loop test device for simulating natural gas gas-phase erosion-corrosion - Google Patents
Loop test device for simulating natural gas gas-phase erosion-corrosion Download PDFInfo
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- CN202974789U CN202974789U CN 201220726596 CN201220726596U CN202974789U CN 202974789 U CN202974789 U CN 202974789U CN 201220726596 CN201220726596 CN 201220726596 CN 201220726596 U CN201220726596 U CN 201220726596U CN 202974789 U CN202974789 U CN 202974789U
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- autoclave
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Abstract
The utility model discloses a loop test device for simulating natural gas gas-phase erosion-corrosion, belongs to the technical field of simulation experiment sets, is applicable to simulating conditions such as medium ingredients, humidity, and flow speed in a natural gas gathering pipeline in an actual running process, and in particular is applicable to simulating the erosion-corrosion condition caused by the flow of the gas which flows in a natural gas pipe at high flow speed and contains trace water and corrosive media and carrying out an electrochemical and corrosion behavior test. The device comprises a control system, a test system and a recycling system, wherein the control system comprises a high-pressure gas cylinder, a high-pressure kettle, a high-pressure flow meter, a regulating valve, a check valve, an electric heater, a humidity probe, a pressure probe and a pipeline; the test system comprises a high-pressure kettle, a three-electrode system, a rotating working platform, a sample fixture and a pressure probe; and the recycling system comprises a recycling tank, a regulating valve, a high-pressure flow meter and a pressure probe. By adopting the device, the erosion-corrosion conditions of the parts such as a pipe wall, an elbow, a tee joint and a reducing part by the high-flow speed wet gas in the internal environment of the natural gas pipe can be simulated and an electrochemical signal can be tested; and the device has important significance in the research on erosion-corrosion behavior rules in the internal environment of the natural gas pipe and main influence factors of the rules.
Description
Technical field
The utility model belongs to the analogue experiment installation technical field, and a kind of loop test device of simulating the erosion corrosion of rock gas gas phase particularly is provided.Be applicable to the conditions such as media components, humidity and flow velocity of gas gathering pipeline in actual moving process are simulated, be particularly useful for simulating the erosion corrosion situation that the gas flow that contains micro-moisture and corrosive medium of high velocity stream in natural gas tube causes and carry out galvanochemistry and the corrosion behavior test, can be used to wash away corrosion behavior rule and major influence factors thereof under environment in the researching natural gas pipe.
Background technology
All contain CO in various degree in the pumped (conveying) medium of natural-gas transfer pipeline, particularly gathering line
2, H
2S, H
2O, these materials can produce erosion corrosion to positions such as tube wall especially elbow, threeway, reducings under the effect of flow velocity, cause the local corrosion thinning fast of natural gas line, cause the accidents of serious failure such as pipe leakage or explosion.In order to slow down the harm of rock gas erosion corrosion, generally adopted in industry and carried the front anticorrosion process such as pre-service, interpolation corrosion inhibiter, upgrading material and pigging operation that rock gas is dewatered in recent years, made the corrosivity of pumped (conveying) medium greatly reduce.But in the middle of actual production, the ubiquity dehydration is insufficient or add corrosion inhibiter situation in shortage, causes managing interior actual corrosion condition and still lays particular stress on.Simultaneously, for increasing the transfer efficiency of rock gas, in pipeline, discharge pressure and gas flow rate improve greatly, cause gas phase erosion corrosion risk significantly to improve.Under the high flow rate gas phase action, after fully dehydration, interpolation capacity corrosion inhibiter or upgrading material, serious erosion corrosion problem still can occur, and particularly serious in the incomplete pipeline of anticorrosion process.But the experimental facilities that at present lacks specialty for these situations is to analyze and research targetedly and the exploitation of anticorrosion technique.The loop apparatus of existing laboratory simulation erosion corrosion mostly is liquid phase and washes away the loop, can't simulate the erosion corrosion situation that the gas flow that contains micro-moisture and corrosive medium of high velocity stream causes in natural gas tube and carry out galvanochemistry and the corrosion behavior test, element has limited the mechanism of washing away corrosion phenomenon under atmosphere in natural gas tube, rule research, sherardizing steel performance that can not the effectively evaluating material.Therefore, in time exploitation can be simulated actual high-voltage high flow rate gas phase erosion corrosion test device and had necessity and urgency.
Summary of the invention
The purpose of this utility model is the antiscour corrosive nature of the erosion corrosion rule, mechanism and the evaluation material that cause for research pipeline transport gas body, provide a cover experimental provision, to simulate easily in natural gas tube under atmosphere the gas of high flow rate to the caused erosion corrosion phenomenon of tube wall.
Device of the present utility model comprises: control system, pilot system and recovery system three parts; Wherein, control system comprises gas cylinder, autoclave, high-pressure flowmeter, variable valve, non-return valve, electric heater, moisture probe, pressure probe and pipeline; Pilot system comprises autoclave, three-electrode system, rotary table, specimen holder, pressure probe.Recovery system comprises recovery pond, variable valve, high-pressure flowmeter and pressure probe.
Concrete structure comprises control system, pilot system and recovery system three parts; Wherein, control system comprises gas cylinder one, gas cylinder two, gas cylinder three, autoclave one, autoclave two, high-pressure flowmeter one, high-pressure flowmeter two, high-pressure flowmeter three, high-pressure flowmeter four, high-pressure flowmeter five, variable valve one, variable valve two, variable valve three, variable valve four, variable valve five, variable valve six, non-return valve one, non-return valve two, non-return valve three, electrical heating, moisture probe, pressure probe one, pressure probe two and pipeline; Pilot system comprises autoclave three, adjusting screw(rod), gear, nozzle, sample, auxiliary electrode, working electrode copper rod, Ag/AgCl contrast electrode, specimen rotating holder, specimen holder; Recovery system comprises recovery pond, variable valve seven, high-pressure flowmeter six and pressure probe three.
The draft tube crosslinked place of each wireway of control system mesohigh gas cylinder one, gas cylinder two, gas cylinder three, the escape pipe of autoclave one and autoclave two connects by screw thread; Connect respectively variable valve one, variable valve two, variable valve three and high-pressure flowmeter one, high-pressure flowmeter two, high-pressure flowmeter three and non-return valve one, non-return valve two, non-return valve three on the wireway of gas cylinder one, gas cylinder two, gas cylinder three; The upper cover of autoclave one, autoclave two is connected with autoclave body by bolt, and utilize viton seal ring to seal, what the escape pipe of autoclave one was connected with autoclave is connected with bolt with the upper cover of kettle respectively into and out of tracheae, the middle gasket seal of placing; Electric heater and pressure probe two connect the upper cover of autoclave one, connect variable valve four and high-pressure flowmeter four on the escape pipe of autoclave one.Connect variable valve five on the draft tube of autoclave two; Moisture probe and pressure probe one connect the upper cover of autoclave two, connect variable valve six and high-pressure flowmeter five on escape pipe.
In pilot system, three-electrode system is by auxiliary electrode, and working electrode copper rod, High Temperature High Pressure Ag/AgCl contrast electrode and signal transduction pathway consist of.Auxiliary electrode and High Temperature High Pressure Ag/AgCl contrast electrode are threaded with the utilization of autoclave upper cover.Sample is placed on the jig pallet of specimen rotating holder, and the adjusting screw(rod) of specimen rotating holder is connected through bolt with the left side of autoclave, and guarantees impermeability with gasket seal.For guaranteeing the high pressure holding capacity of kettle, on the left of autoclave, wall thickness will be higher than other positions.In the draft tube of autoclave three gas of pass-out by nozzle ejection at specimen surface.
The draft tube crosslinked place of each wireway of control system mesohigh gas cylinder one, gas cylinder two, gas cylinder three, the escape pipe of autoclave one and autoclave two connects by screw thread, forms the distribution pipeline.Connect variable valve one, variable valve two, variable valve three and high-pressure flowmeter one, high-pressure flowmeter two, high-pressure flowmeter three and non-return valve one, non-return valve two, non-return valve three on the wireway of gas cylinder one, gas cylinder two, gas cylinder three, be used for controlling H
2S, CO
2, N
2The ratio that passes into and the speed of three kinds of gases.The upper cover of autoclave one, autoclave two is connected with autoclave body by bolt, and utilize viton seal ring to seal, what the escape pipe of autoclave one was connected with autoclave is connected with bolt with the upper cover of kettle respectively into and out of tracheae, the middle gasket seal of placing seals, and guarantees impermeability.Electric heater and pressure probe two connect the upper cover of autoclave one, produce to make by heating to produce steam in kettle, connect variable valve four and high-pressure flowmeter four on the escape pipe of autoclave one, are used for controlling the quantity of steam that passes in autoclave two.Connect variable valve five on the draft tube of autoclave two and be used for controlling the gas circuit direction.Pressure probe and moisture probe connect the upper cover of autoclave two, are used for measuring humidity and pressure in still, connect variable valve six and high-pressure flowmeter three on escape pipe, are used for controlling the flow of eluting gas.
The escape pipe of retracting device part autoclave three passes into to prevent from recovery pond environment is produced and pollutes, and connects variable valve seven and high-pressure flowmeter on the escape pipe of autoclave three, is connected to pressure probe three in recovery pond, is used for regulating the pressure in recovery pond.
The utility model has the advantage of:
1. can make ejection reach the flow velocity of the γ-ray emission 0 ~ 30m/s of specimen surface by gas return path, change the defective of in the past washing away the low flow velocity in loop, can simulate the souring of gas in actual natural gas line operational process;
2. the control to humidity and atmosphere can be realized, variable concentrations H can be carried out
2S, CO
2Simulation test under the moisture condition, humidity range can change in 30% ~ 100% scope, can simulate to greatest extent the service condition of actual natural gas line;
3. can carry out electrochemical in-situ test, overcome and to realize the difficulty of electrochemical in-situ test in the air scour loop, but the combined with electrochemical method be studied rule and the major influence factors of erosion corrosion.
4. can realize 180 ° of rotations of sample impact angle by specimen rotating holder, can simulate the erosion corrosion situation that in actual gas pipeline, tube wall, threeway, elbow and reducing etc. are located.
Description of drawings
Fig. 1 is structural representation of the present utility model.Wherein, H
2S gas cylinder 1, CO
2Gas cylinder 2, N
2Gas cylinder 3, variable valve 4,7,10,13,15,16,37, high- pressure flowmeter 5,8,11,14,17,35, non-return valve 6,9,12, autoclave 23,24,34, water 20, electric heater 21, moisture probe 18, pressure probe 19,22,36, adjusting screw(rod) 25, gear 26, nozzle 27, sample 28, auxiliary electrode 29, working electrode copper rod 30, Ag/AgCl contrast electrode 31, specimen rotating holder 32, specimen holder 33, recovery pond 38.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As shown in Figure 1, during test, sample is put into autoclave 34, regulate the angle that the rotation sample bench makes sample and nozzle become to need.Guaranteed before on-test that all valves are in closed condition, opening high pressure gas cylinder 1,2,3 air valve and variable valve 4,7,10,15, and regulate by 4,7,10 the H that passes in autoclave 24
2S, CO
2, N
2Three kinds of gas ratios and flow after the pressure probe test value reaches certain pressure, are closed gas cylinder 1 and 2, close variable valve 15 and open variable valve 13, with N
2Pass in autoclave 23, open electric heater 21, when reaching certain value, temperature and pressure closes the valve of gas cylinder 2, the steam that produces in autoclave 23 when opening variable valve 15 is passed in autoclave 24, when reaching needed condition, the pressure in autoclave 24 and humidity closes variable valve 13 and 14, open variable valve 16, make gas be ejected into specimen surface with certain speed, the external electrochemical workstation of three-electrode system can carry out electro-chemical test.Open variable valve 37 in test process, tail gas is drained in recovery pond.This experimental provision can effectively be simulated high flow rate moisture erosion corrosion phenomenon in natural gas tube.
Although above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the technical solutions of the utility model bases, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (4)
1. a loop test device of simulating the erosion corrosion of rock gas gas phase, is characterized in that: comprise control system, pilot system and recovery system three parts, wherein, control system comprises gas cylinder one (1), gas cylinder two (2), gas cylinder three (3), autoclave one (23), autoclave two (24), high-pressure flowmeter one (5), high-pressure flowmeter two (8), high-pressure flowmeter three (11), high-pressure flowmeter four (14), high-pressure flowmeter five (17), variable valve one (4), variable valve two (7), variable valve three (10), variable valve four (13), variable valve five (15), variable valve six (16), non-return valve one (6), non-return valve two (9), non-return valve three (12), electric heater (21), moisture probe (18), pressure probe one (19), pressure probe two (22) and pipeline, pilot system comprises autoclave three (34), adjusting screw(rod) (25), gear (26), nozzle (27), sample (28), auxiliary electrode (29), working electrode copper rod (30), Ag/AgCl contrast electrode (31), specimen rotating holder (32), specimen holder (33), recovery system comprises recovery pond (38), variable valve seven (37), high-pressure flowmeter six (35) and pressure probe three (36), the draft tube crosslinked place of each wireway of control system mesohigh gas cylinder one (1), gas cylinder two (2), gas cylinder three (3), the escape pipe of autoclave one (23) and autoclave two (24) connects by screw thread, connect respectively variable valve one (4), variable valve two (7), variable valve three (10) and high-pressure flowmeter one (5), high-pressure flowmeter two (8), high-pressure flowmeter three (11) and non-return valve one (6), non-return valve two (9), non-return valve three (12) on the wireway of gas cylinder one (1), gas cylinder two (2), gas cylinder three (3), the upper cover of autoclave one (23), autoclave two (24) is connected with autoclave body by bolt, and utilize viton seal ring to seal, the escape pipe of autoclave one (23) is connected with autoclave being connected with bolt with the upper cover of kettle respectively into and out of tracheae of (24), the middle gasket seal of placing, electric heater (21) and pressure probe two (22) connect the upper cover of autoclave one (23), connect variable valve four (13) and high-pressure flowmeter four (14) on the escape pipe of autoclave one (23), connect variable valve five (15) on the draft tube of autoclave two (24), moisture probe (18) and pressure probe one (19) connect the upper cover of autoclave two (24), connect variable valve six (16) and high-pressure flowmeter five (17) on escape pipe, the draft tube top connection top nozzle (27) of autoclave three (34).
2. the loop test device of simulation rock gas gas phase as claimed in claim 1 erosion corrosion is characterized in that: variable valve one (4), variable valve two (7), variable valve three (10), variable valve five (15) by gas cylinder one (1), gas cylinder two (2), gas cylinder three (3) in control system are regulated the H that passes in autoclave two (24)
2S, CO
2, N
2Three kinds of gas ratios and flow, by the pressure in pressure probe one (19) testing high voltage still (24), change the gas circuit direction by variable valve four (13) and variable valve five (15), electric heater (22) is heated to uniform temperature and makes generation steam in autoclave one (23), reaches required condition by the pressure probe one (19) in the variable valve in gas circuit and autoclave two (24) and moisture probe (18); Regulating specimen rotating holder by adjusting screw(rod) in pilot system changes sample and gas spray angle between 0 ° to 180 °.
3. the loop test device of simulation rock gas gas phase as claimed in claim 1 erosion corrosion, it is characterized in that: auxiliary electrode in pilot system (29), working electrode copper rod (30), High Temperature High Pressure Ag/AgCl contrast electrode (31) are threaded connection to the upper cover of autoclave three (34); Sample (28) is placed on the jig pallet (33) of specimen rotating holder (32), and the adjusting screw(rod) of specimen rotating holder (25) is connected through bolt (26) with the left side of autoclave three, the middle gasket seal of placing, and autoclave three left side wall thickness will be higher than other positions; Auxiliary electrode and High Temperature High Pressure Ag/AgCl contrast electrode are threaded with the utilization of autoclave upper cover, in the draft tube of autoclave three gas of pass-out by nozzle ejection at specimen surface.
4. the loop test device of simulation rock gas gas phase as claimed in claim 1 erosion corrosion is characterized in that:; The escape pipe of recovery system mesohigh still three (34) passes in recovery pond (38), connect variable valve seven (37) and high-pressure flowmeter six (35) on the escape pipe of autoclave three (34), be connected to pressure probe three (36) in recovery pond, be used for regulating the pressure in recovery pond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726596 CN202974789U (en) | 2012-12-25 | 2012-12-25 | Loop test device for simulating natural gas gas-phase erosion-corrosion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220726596 CN202974789U (en) | 2012-12-25 | 2012-12-25 | Loop test device for simulating natural gas gas-phase erosion-corrosion |
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| Publication Number | Publication Date |
|---|---|
| CN202974789U true CN202974789U (en) | 2013-06-05 |
Family
ID=48515847
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220726596 Expired - Lifetime CN202974789U (en) | 2012-12-25 | 2012-12-25 | Loop test device for simulating natural gas gas-phase erosion-corrosion |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980823A (en) * | 2012-12-25 | 2013-03-20 | 北京科技大学 | Loop test device for imitating gas phase erosion corrosion of natural gas |
| CN104458396A (en) * | 2014-12-12 | 2015-03-25 | 中国石油天然气集团公司 | Device and method for preparing metallurgical composite pipe inner cladding layer intercrystalline corrosive sample |
| CN106053324A (en) * | 2016-05-19 | 2016-10-26 | 北京科技大学 | Moisture corrosion electrochemical testing device with controllable atmosphere and liquid film components |
| CN106841026A (en) * | 2016-12-27 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of method for evaluating corrosion inhibiter inhibition efficiency |
| CN110346400A (en) * | 2019-06-18 | 2019-10-18 | 北京科技大学 | A kind of experimental rig and method for simulating Cannon burning |
| CN111238980A (en) * | 2020-02-17 | 2020-06-05 | 西南石油大学 | Erosion experimental device and method for shale gas ground gathering and transportation system |
| CN113205437A (en) * | 2021-05-25 | 2021-08-03 | 海南硬壳科技有限公司 | One-stop study-keeping service platform |
-
2012
- 2012-12-25 CN CN 201220726596 patent/CN202974789U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102980823A (en) * | 2012-12-25 | 2013-03-20 | 北京科技大学 | Loop test device for imitating gas phase erosion corrosion of natural gas |
| CN102980823B (en) * | 2012-12-25 | 2014-08-13 | 北京科技大学 | Loop test device for imitating gas phase erosion corrosion of natural gas |
| CN104458396A (en) * | 2014-12-12 | 2015-03-25 | 中国石油天然气集团公司 | Device and method for preparing metallurgical composite pipe inner cladding layer intercrystalline corrosive sample |
| CN104458396B (en) * | 2014-12-12 | 2017-11-07 | 中国石油天然气集团公司 | The preparation facilities and method of a kind of metallurgical composite pipe internal coated layer intercrystalline corrosion samples |
| CN106053324A (en) * | 2016-05-19 | 2016-10-26 | 北京科技大学 | Moisture corrosion electrochemical testing device with controllable atmosphere and liquid film components |
| CN106053324B (en) * | 2016-05-19 | 2019-05-17 | 北京科技大学 | A kind of humidity corrosion electrochemical testing device of controlled atmosphere and liquid film ingredient |
| CN106841026A (en) * | 2016-12-27 | 2017-06-13 | 中国石油天然气股份有限公司 | A kind of method for evaluating corrosion inhibiter inhibition efficiency |
| CN106841026B (en) * | 2016-12-27 | 2019-09-10 | 中国石油天然气股份有限公司 | A method of evaluation corrosion inhibiter inhibition efficiency |
| CN110346400A (en) * | 2019-06-18 | 2019-10-18 | 北京科技大学 | A kind of experimental rig and method for simulating Cannon burning |
| CN111238980A (en) * | 2020-02-17 | 2020-06-05 | 西南石油大学 | Erosion experimental device and method for shale gas ground gathering and transportation system |
| CN111238980B (en) * | 2020-02-17 | 2022-04-15 | 西南石油大学 | Erosion experimental device and method for shale gas ground gathering and transportation system |
| CN113205437A (en) * | 2021-05-25 | 2021-08-03 | 海南硬壳科技有限公司 | One-stop study-keeping service platform |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20140507 |
|
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |