CN103616324A - Multi-phase flow erosion corrosion test bed of humid H2S environment - Google Patents
Multi-phase flow erosion corrosion test bed of humid H2S environment Download PDFInfo
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- CN103616324A CN103616324A CN201310567533.3A CN201310567533A CN103616324A CN 103616324 A CN103616324 A CN 103616324A CN 201310567533 A CN201310567533 A CN 201310567533A CN 103616324 A CN103616324 A CN 103616324A
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Abstract
The invention provides a multi-phase flow erosion corrosion test bed of a humid H2S environment. The multi-phase flow erosion corrosion test comprises a gas pipeline, a liquid pipeline, a testing pipeline and a safety accessory pipeline, wherein the gas pipeline and the liquid pipeline are connected with a testing section by a mixer; an outlet of the testing section is connected with a cyclone separator; a gas outlet of the cyclone separator is connected with the gas pipeline; a liquid outlet of the cyclone separator is connected with the liquid pipeline by a pipeline; a gas pipeline part, a liquid pipeline part and a testing pipeline part are distributed in a safety room; an H2S tester is arranged in the safety room; the safety room is communicated with an inlet pipeline of a combustor by a fan; the outlet of the combustor is connected with an alkaline liquid spraying device by a pipeline. A control method of the test bed comprises safety control, temperature control and flow control. According to the multi-phase flow erosion corrosion test bed of the humid H2S environment, the test bed is separated from the outside, so that the safety of a test is enhanced and residual gas generated after the test is treated effectively; the multi-phase flow erosion corrosion test bed of the humid H2S environment has the characteristics of safety, cost reduction, easiness for operation and the like.
Description
Technical field
The present invention relates to the technical field of corrosive medium erosion corrosion testing table, be specifically related to a kind of polyphasic flow erosion corrosion testing table of wet H2S environment.
Background technology
In the collection of oil and natural gas, processing industry, wet H
2the polyphasic flow erosion corrosion of S medium has become affects pipeline or the major reason in container life-span, the wet H of research
2the erosion corrosion mechanism of S medium and guard technology are significant for reliability and the life-span of improving pipeline or container.H
2s gas is hypertoxic gas, the wet H of simulation
2the corrosion test of S environment must be paid attention to safety problem.Patents retrieval is as follows:
The corrosion simulated test unit of multi-functional circuit formula oil gas water multiphase (CN201210067072.9) does not arrange safe house and corresponding vent gas treatment parts, can not absorb H
2s tail gas.
Pipe flow type liquid/solid double phase flow flushing corrosion (CN00253528.9) does not arrange safe house and corresponding vent gas treatment parts, can not absorb H
2s tail gas.
In alternating oxidation-vulcanized gas, the high temperature corrosion analogue means (CN01248009.6) of engineering steel does not have gas, liquid line, and safe house and corresponding vent gas treatment parts are not set, and can not absorb H
2s tail gas.
High-temp high-flow-speed outwash experiment equipment (CN01211291.7) does not arrange safe house and corresponding vent gas treatment parts, can not absorb H
2s tail gas.
Simulated petrochemical pipeline erosion-corrosion monitoring test device (CN200920278231.3) does not arrange safe house and corresponding vent gas treatment parts, can not absorb H
2s tail gas.
The loop test device (CN201220726596.X) of simulating the erosion corrosion of rock gas gas phase does not arrange safe house and corresponding vent gas treatment parts, can not absorb H
2s tail gas.
Polyphasic flow washes away local corrosion test macro (CN201310116589.7) safe house and corresponding vent gas treatment parts is not set, and can not absorb H
2s tail gas.
The safety prevention measure of existing similar pilot system, or aftertreatment scheme is all not enough to meet wet H
2the requirement of the corrosion test of S environment.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of wet H
2the polyphasic flow erosion corrosion testing table of S environment, can meet wet H
2the requirement of the corrosion test of S environment, has safety, saves the features such as cost, easy operating.
In order to achieve the above object, the technical scheme that the present invention takes is:
A kind of wet H
2the polyphasic flow erosion corrosion testing table of S environment, comprises gas piping, liquid line, test pipeline, safety attachment pipeline.
In gas piping, gas cylinder 1 is connected in the import of gas-holder 3 by the first stop valve 2, the outlet of gas-holder 3 is connected with the air intake opening of surge tank 7 by compressor 4, the gas outlet of surge tank 7 is successively by the first refrigeratory 9, the first pressure transducer 10, the first temperature sensor 11, first flow meter 12 is connected with the air intake opening of mixer 13, the first solenoid valve 6 is connected on surge tank 7 by pipeline one end, the other end connects on gas-holder 3, the first controller 8 and the first solenoid valve 6, the first pressure transducer 10, the first temperature sensor 11, first flow meter 12, the first refrigeratory 9 connects,
In liquid line, the outlet of fluid reservoir 22 is connected with the entrance of acid proof pump 20, the outlet of acid proof pump 20 is connected with the inlet of mixer 13 by the second refrigeratory 19, the second pressure transducer 17, the second temperature sensor 16, the second flowmeter 15 successively, the second solenoid valve 21 is connected respectively to by pipeline on the discharge pipe and fluid reservoir 22 of acid proof pump 20, and second controller 18 is connected with the second solenoid valve 21, the second pressure transducer 17, the second temperature sensor 16, the second flowmeter 15, the second refrigeratory 19;
In test pipeline, the outlet of mixer 13 is connected with the entrance of test section 14, the outlet of test section 14 is connected with the entrance of cyclone separator 23, and cyclone separator 23 gas outlets are connected with gas-holder 3 by the second stop valve 29, and cyclone separator 23 liquid outlets are connected with fluid reservoir 22 by pipeline.
Described gas piping parts, liquid line parts and developmental tube circuit unit are arranged in safe house 25 entirely, in safe house 25, are placed with H
2s detector 24, safe house 25 is communicated with by the inlet duct of blower fan 26 and burner 27, and burner 27 outlets are connected to alkali lye spray thrower 31 by pipeline.
Described safety attachment pipeline comprises that the first safety valve 5, the second safety valve 30 and the 3rd solenoid valve 28, the first safety valve 5 are connected on surge tank 7 by pipeline one end, and the other end is connected on the inlet duct of burner 27; The second safety valve 30 is connected on gas-holder 3 by pipeline one end, and the other end is connected on the inlet duct of burner 27; The 3rd solenoid valve 28 is connected on gas-holder 3 by pipeline one end, and the other end is connected on burner 27 inlet ducts, and the 3rd controller 32 respectively and H
2s detector 24, the 3rd solenoid valve 28 are connected, blower fan 26 is connected.
Described wet H
2the control method of the polyphasic flow erosion corrosion testing table of S environment comprises:
Security control: H
2h in S detector 24 monitoring safe houses 25
2s concentration, data are imported in the 3rd controller 32, if H
2when S concentration surpasses alarm threshold value, the 3rd controller 32 is first controlled blower fan 26 and is increased exhausting flow, and open the 3rd solenoid valve 28, gas in testing table pipe is discharged, by burner 27 and alkali lye spray thrower 31, carry out harmless processing, and send safety alarm, prompting operation person cuts off the power supply of compressor 4 and acid proof pump 20, carry out safe escape or carry out other emergency measures, after system pipeline shuts down, the 3rd controller 32 continues to read H
2the Monitoring Data of S detector 24, works as H
2s concentration in allowed band time, is just sent the signal that permission personnel enter, and prompting operation person delays and closes blower fan 26, burner 27 and alkali lye spray thrower 31;
Temperature is controlled: in system operational process, temperature can raise gradually, for gas piping, the first temperature sensor 11 reads pipeline medium temperature, data are sent in the first controller 8, if gas piping temperature, lower than set temperature value, is carried out low-temperature warning in the first controller 8, prompting operation person reduces the flow of the first refrigeratory 9, or the temperature in of heat eliminating medium in first refrigeratory 9 that raises; Otherwise, if gas piping temperature is higher than set temperature value, improve the flow of the first refrigeratory 9 or reduce the temperature in of the first refrigeratory 9 media, in like manner, to liquid line, the second temperature sensor 16 reads pipeline medium temperature, data are sent in second controller 18, if liquid line temperature, lower than set temperature value, is carried out low-temperature warning in second controller 18, prompting operation person reduces the flow of the second refrigeratory 19, or the temperature in of heat eliminating medium in second refrigeratory 19 that raises; Otherwise, if liquid line temperature, higher than set temperature value, is pointed out the flow that improves the second refrigeratory 19 or the temperature in that reduces the second refrigeratory 19 media;
Flow control: for liquid line, the second flowmeter 15 reads the volumetric flow rate of pipeline medium, data are sent in second controller 18 and calculate and export, if fluid flow lower than setting value, second controller 18 is controlled the second solenoid valves 21 and is closed minor valves, the flow that is back to fluid reservoir 22 is reduced, otherwise, if flow higher than setting value, 18 of second controllers are controlled the second solenoid valves 21 and are opened large valve, the flow that makes to be back to fluid reservoir 22 increases, until flow stops while reaching requirement; For gas piping, first flow meter 12 reads the volumetric flow rate of pipeline medium, data are sent in the first controller 8 and calculate and export, if fluid flow is lower than setting value, the first controller 12 is controlled the first solenoid valve 6 and is closed minor valve, the flow that is back to gas-holder 3 is reduced, otherwise, if flow is higher than setting value, 12 of second controllers are controlled the second solenoid valve 6 and are opened large valve, and the flow that is back to gas-holder 3 is increased, until flow stops while reaching requirement, after flow changes, system temperature can fluctuate, and now needs to carry out temperature control.
Beneficial effect of the present invention is:
1) the present invention designs a complete totally enclosed safe house, and testing table and the external world are separated, and by blower fan, is aspirated and is prevented that poisonous gas is to safe house external leakage, utilizes burner and alkali lye spray to carry out harmless processing to poisonous gas, reaches the object of safety and environmental protection.
2) for testing table, the present invention has designed method of controlling security, when in finding safe house, H2S gas concentration surpasses secure threshold, controller sends safety alarm, and Open valve carries out exhaust automatically, and strengthens blower fan suction flow, prompting operation person cuts off the power supply of compressor and acid proof pump, can make system immediately poisonous gas be discharged and be there is no harm reason after there is poisonous gas leakage, without manual intervention, increase the security of system.
3) system arranges refrigeratory at gas piping and liquid line, designs corresponding temperature-controlled process, by regulating refrigeratory inlet flow rate and temperature in to maintain system temperature, has solved the problem that temperature can progressively raise after device long-time running.
Accompanying drawing explanation
Accompanying drawing is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to accompanying drawing, a kind of wet H
2the polyphasic flow erosion corrosion testing table of S environment, comprises gas piping, liquid line, test pipeline and safety attachment pipeline,
In gas piping, gas cylinder 1 is connected in the import of gas-holder 3 by the first stop valve 2, the outlet of gas-holder 3 is connected with the air intake opening of surge tank 7 by compressor 4, the gas outlet of surge tank 7 is successively by the first refrigeratory 9, the first pressure transducer 10, the first temperature sensor 11, first flow meter 12 is connected with the air intake opening of mixer 13, the first solenoid valve 6 is connected on surge tank 7 by pipeline one end, the other end connects on gas-holder 3, the first controller 8 and the first solenoid valve 6, the first pressure transducer 10, the first temperature sensor 11, first flow meter 12, the first refrigeratory 9 connects,
In liquid line, the outlet of fluid reservoir 22 is connected with the entrance of acid proof pump 20, the outlet of acid proof pump 20 is connected with the inlet of mixer 13 by the second refrigeratory 19, the second pressure transducer 17, the second temperature sensor 16, the second flowmeter 15 successively, the second solenoid valve 21 is connected respectively on acid proof pump 20 discharge pipes and fluid reservoir 22 by pipeline, and second controller 18 is connected with the second solenoid valve 21, the second pressure transducer 17, the second temperature sensor 16, the second flowmeter 15, the second refrigeratory 19;
In test pipeline, the outlet of mixer 13 is connected with the entrance of test section 14, the outlet of test section 14 is connected with the entrance of cyclone separator 23, and cyclone separator 23 gas outlets are connected with gas-holder 3 by the second stop valve 29, and cyclone separator 23 liquid outlets are connected with fluid reservoir 22 by pipeline.
Described gas piping parts, liquid line parts and developmental tube circuit unit are entirely arranged in safe house 25, in safe house 25, are placed with H
2s detector 24, safe house 25 is communicated with by the inlet duct of blower fan 26 and burner 27, and burner 27 outlets are connected to alkali lye spray thrower 31 by pipeline.
Described safety attachment pipeline comprises that the first safety valve 5, the second safety valve 30 and the 3rd solenoid valve 28, the first safety valve 5 are connected on surge tank 7 by pipeline one end, and the other end is connected on the inlet duct of burner 27; The second safety valve 30 is connected on gas-holder 3 by pipeline one end, and the other end is connected on the inlet duct of burner 27; The 3rd solenoid valve 28 is connected on gas-holder 3 by pipeline one end, and the other end is connected on burner 27 inlet ducts, and the 3rd controller 32 respectively and H
2s detector 24, the 3rd solenoid valve 28 are connected, blower fan 26 is connected.
Principle of work of the present invention is:
When experiment starts, first carry out nitrogen blowing, and store a certain amount of actuating medium in fluid reservoir 22 and gas cylinder 1.While boosting, open the first stop valve 2, close the second stop valve 29, in gas cylinder 1, mix containing H
2s gas enters gas-holder 3, starts compressor 4, by gas inject surge tank 7 and follow-up pipeline, until reach the certain multiple of experimental pressure.Then, close the first stop valve 2, slowly open the second stop valve 29, make to be full of gases at high pressure in gas-holder, the integral pressure in pipeline can drop near experimental pressure.If pressure does not reach test pressure, can replace in new and fill the gas cylinder 1 of gases at high pressure, and slowly open the first stop valve 2, when still rising to setting value, pressure closes again.If pressure, higher than test pressure, can slowly be opened the 3rd solenoid valve 28, pipeline gas is discharged, until pressure is closed while reaching setting value again.
Then, start compressor 4 and acid proof pump 20, gas and liquid are pumped into mixer 13 simultaneously, mixed MEDIA FLOW overtesting section 14, and in separation vessel 23, carry out gas-liquid separation, and gas flows into gas-holder 3, and liquid flows into fluid reservoir 22, makes fluid media (medium) circulation.In process of the test, line pressure may reduce gradually, needs at set intervals, opens stop valve 2 one time, allows the gases at high pressure in gas cylinder 1 pour pipeline, maintains pipeline pressure.
The first controller 8 of gas piping reads the data of the first pressure transducer 10, the first temperature sensor 11 and first flow meter 12, by controlling the aperture of the first solenoid valve 6, piping flow is regulated, by controlling the inlet flow rate of the first refrigeratory 9, pipeline temperature is regulated.
In like manner, the second controller 18 of liquid line reads the data of the second pressure transducer 17, the second temperature sensor 16 and the second flowmeter 15, by controlling the aperture of the second solenoid valve 21, piping flow is regulated, by controlling the inlet flow rate of the second refrigeratory 19, pipeline temperature is regulated.
The medium of gas piping and liquid line mixes in mixer 13, and flows into test section 14, then enters separation vessel 23 and carry out gas-liquid separation.Wherein the gas after separation flows directly into gas-holder 3, and liquid flows directly into fluid reservoir 22.
In process of the test, H
2h in S detector 24 monitoring safe houses 25
2s concentration, data are imported in the 3rd controller 32.If H
2when S concentration surpasses alarm threshold value, the 3rd controller 32 is first controlled blower fan 26 and is increased exhausting flow, and opens the 3rd solenoid valve 28, and gas slowly in testing table pipe is discharged, and by burner 27 and alkali lye spray thrower 31, carries out harmless processing.And sending safety alarm, prompting operation person cuts off the power supply of compressor 4 and acid proof pump 20, carries out safe escape or carries out other emergency measures.
After off-test, the 3rd controller 32 is slowly opened the 3rd solenoid valve 28, and intrasystem gas is progressively flowed out, and after burner 27 burnings, recycling alkali lye spray thrower 31 absorbs.The 3rd controller 32 continues to read H
2the Monitoring Data of S detector 24, works as H
2s concentration in allowed band time, is just sent the signal that permission personnel enter, and prompting operation person delays and closes blower fan 26, burner 27 and alkali lye spray thrower 31.
The second safety valve 30 and the first safety valve 5 can prevent container superpressure, and the gas leaking out after superpressure is by pipeline burner 27 burning of flowing through, then by alkali lye spray thrower 31.
The above is only preferred embodiment of the present invention, and the equivalence of doing according to structure, feature and principle described in patent claim of the present invention therefore all changes or modifies, and is included in patent claim of the present invention.
Claims (4)
1. a wet H
2the polyphasic flow erosion corrosion testing table of S environment, comprises gas piping, liquid line, test pipeline and safety attachment pipeline, it is characterized in that:
In gas piping, gas cylinder (1) is connected in the import of gas-holder (3) by the first stop valve (2), the outlet of gas-holder (3) is connected with the air intake opening of surge tank (7) by compressor (4), the gas outlet of surge tank (7) is successively by the first refrigeratory (9), the first pressure transducer (10), the first temperature sensor (11), first flow meter (12) is connected with the air intake opening of mixer (13), the first solenoid valve (6) is connected on surge tank (7) by pipeline one end, the other end is connected on surge tank (7), the first controller (8) and the first solenoid valve (6), the first pressure transducer (10), the first temperature sensor (11), first flow meter (12), the first refrigeratory (9) connects,
In liquid line, the outlet of fluid reservoir (22) is connected with the entrance of acid proof pump (20), the outlet of acid proof pump (20) is successively by the second refrigeratory (19), the second pressure transducer (17), the second temperature sensor (16), the second flowmeter (15) is connected with the inlet of mixer (13), the second solenoid valve (21) is connected respectively on the discharge pipe and fluid reservoir (22) of acid proof pump (20) by pipeline, second controller (18) and the second solenoid valve (21), the second pressure transducer (17), the second temperature sensor (16), the second flowmeter (15), the second refrigeratory (19) connects,
In test pipeline, the outlet of mixer (13) is connected with the entrance of test section (14), the outlet of test section (14) is connected with the entrance of cyclone separator (23), cyclone separator (23) gas outlet is connected with gas-holder (3) by the second stop valve (29), and cyclone separator (23) liquid outlet is connected with fluid reservoir (22) by pipeline.
2. a kind of wet H according to claim 1
2the polyphasic flow erosion corrosion testing table of S environment, is characterized in that: described gas piping parts, liquid line parts and developmental tube circuit unit arrange that, in safe house (25), safe house is placed with H in (25) entirely
2s detector (24), safe house (25) is communicated with by the inlet duct of blower fan (26) and burner (27), and burner (27) outlet is connected to alkali lye spray thrower (31) by pipeline.
3. a kind of wet H according to claim 1 and 2
2the polyphasic flow erosion corrosion testing table of S environment, it is characterized in that: described safety attachment pipeline comprises the first safety valve (5), the second safety valve (30) and the 3rd solenoid valve (28), it is upper that the first safety valve (5) is connected to surge tank (7) by pipeline one end, and the other end is connected on the inlet duct of burner (27); It is upper that the second safety valve (30) is connected to gas-holder (3) by pipeline one end, and the other end is connected on the inlet duct of burner (27); It is upper that the 3rd solenoid valve (28) is connected to gas-holder (3) by pipeline one end, and the other end is connected on burner (27) inlet duct, and the 3rd controller (32) respectively and H
2s detector (24), the 3rd solenoid valve (28) are connected, blower fan (26) is connected.
4. a kind of wet H according to claim 3
2the polyphasic flow erosion corrosion testing table of S environment, is characterized in that: described wet H
2the control method of the polyphasic flow erosion corrosion testing table of S environment comprises:
Security control: H
2h in S detector (24) monitoring safe house (25)
2s concentration, data are imported in the 3rd controller (32), if H
2when S concentration surpasses alarm threshold value, the 3rd controller (32) is first controlled blower fan (26) and is increased exhausting flow, and open the 3rd solenoid valve (28), gas in testing table pipe is discharged, by burner (27) and alkali lye spray thrower (31), carry out harmless processing, and send safety alarm, prompting operation person cuts off the power supply of compressor (4) and acid proof pump (20), carry out safe escape or carry out other emergency measures, after system pipeline shuts down, the 3rd controller (32) continues to read H
2the Monitoring Data of S detector (24), works as H
2s concentration in allowed band time, is just sent the signal that permission personnel enter, and prompting operation person delays and closes blower fan (26), burner (27) and alkali lye spray thrower (31);
Temperature is controlled: for gas piping, the first temperature sensor (11) reads pipeline medium temperature, data are sent in the first controller (8), if gas piping temperature is lower than set temperature value, the first controller carries out low-temperature warning in (8), prompting operation person reduces the flow of the first refrigeratory (9), or the temperature in of the middle heat eliminating medium of the first refrigeratory (9) that raises; Otherwise, if gas piping temperature is higher than set temperature value, improve the flow of the first refrigeratory (9) or reduce the temperature in of the first refrigeratory (9) medium, in like manner, to with liquid line, the second temperature sensor (16) reads pipeline medium temperature, data are sent in second controller (18), if liquid line temperature is lower than set temperature value, second controller carries out low-temperature warning in (18), prompting operation person reduces the flow of the second refrigeratory (19), or the temperature in of the middle heat eliminating medium of the second refrigeratory (19) that raises; Otherwise, if liquid line temperature, higher than set temperature value, is pointed out the flow that improves the second refrigeratory (19) or the temperature in that reduces the second refrigeratory (19) medium;
Flow control: for liquid line, the second flowmeter (15) reads the volumetric flow rate of pipeline medium, data are sent in second controller (18) and calculate and export, if fluid flow is lower than setting value, second controller (18) is controlled the second solenoid valve (21) and is closed minor valve, the flow that is back to fluid reservoir (22) is reduced, otherwise, if flow is higher than setting value, second controller (18) is controlled the second solenoid valve (21) and is opened large valve, the flow that makes to be back to fluid reservoir (22) increases, until flow stops while reaching requirement, for gas piping, first flow meter (12) reads the volumetric flow rate of pipeline medium, data are sent in the first controller (8) and calculate and export, if fluid flow is lower than setting value, the first controller (12) is controlled the first solenoid valve (6) and is closed minor valve, the flow that is back to gas-holder (3) is reduced, otherwise, if flow is higher than setting value, second controller (12) is controlled the second solenoid valve (6) and is opened large valve, the flow that is back to gas-holder (3) is increased, until flow stops while reaching requirement, after flow changes, system temperature can fluctuate, now need to carry out temperature control.
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| CN107167383A (en) * | 2017-04-28 | 2017-09-15 | 中国石油大学(华东) | Circulating HTHP gas-liquid two-phase erosive wear experimental provision and method |
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| CN116297149A (en) * | 2023-05-18 | 2023-06-23 | 西南石油大学 | Experimental equipment and method for simulating erosion corrosion of oil and gas field pipeline material |
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