CN116297134A - Pipeline scaling sensitivity testing device and application method thereof - Google Patents
Pipeline scaling sensitivity testing device and application method thereof Download PDFInfo
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- CN116297134A CN116297134A CN202310225251.9A CN202310225251A CN116297134A CN 116297134 A CN116297134 A CN 116297134A CN 202310225251 A CN202310225251 A CN 202310225251A CN 116297134 A CN116297134 A CN 116297134A
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- 238000012360 testing method Methods 0.000 title claims abstract description 113
- 230000035945 sensitivity Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 245
- 238000003860 storage Methods 0.000 claims abstract description 136
- 150000001450 anions Chemical class 0.000 claims abstract description 98
- 150000001768 cations Chemical class 0.000 claims abstract description 98
- 238000010438 heat treatment Methods 0.000 claims abstract description 96
- 238000011084 recovery Methods 0.000 claims abstract description 32
- 239000002699 waste material Substances 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 169
- 239000002455 scale inhibitor Substances 0.000 claims description 82
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 54
- 239000007791 liquid phase Substances 0.000 claims description 43
- 125000000129 anionic group Chemical group 0.000 claims description 37
- 125000002091 cationic group Chemical group 0.000 claims description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 239000001569 carbon dioxide Substances 0.000 claims description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 27
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 17
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims 3
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000003670 easy-to-clean Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 233
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/006—Investigating resistance of materials to the weather, to corrosion, or to light of metals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L13/00—Devices or apparatus for measuring differences of two or more fluid pressure values
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/008—Monitoring fouling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a pipeline scaling sensitivity testing device which comprises a cation solution storage tank and an anion solution storage tank, wherein the two storage tanks are connected with a liquid mixing device, the liquid mixing device is connected with a waste liquid recovery device through a testing pipeline, a first pressure sensor is connected to a first liquid pipeline/a second liquid pipeline, a second pressure sensor is connected to the testing pipeline, the first pressure sensor and the second pressure sensor are both connected with a differential pressure sensor, the differential pressure sensor is connected with a computer, heating devices are arranged on the first liquid pipeline and the second liquid pipeline, and the first liquid pipeline and the second liquid pipeline are both connected with a temperature sensor. The invention also discloses a use method of the pipeline scaling sensitivity testing device. The device can truly simulate the scaling condition of working conditions, solves the problem of accurate monitoring of scaling in the pipeline, realizes real-time adjustment of corrosion environment parameters, is easy to clean and has good experimental repeatability.
Description
Technical Field
The invention relates to the technical field of evaluation of scaling performance of petroleum and natural gas pipelines, in particular to a scaling sensitivity testing device for petroleum and natural gas pipelines and a using method thereof.
Background
Petroleum and natural gas are main energy sources required for human production and life, and the position of petroleum and natural gas in the whole national economy is increasingly important. In petroleum and natural gas exploitation and transportation processes, equipment, pipelines and the like are mainly made of metal materials, and corrosion is inevitably generated. The serious corrosion damage not only causes huge economic loss, but also causes serious pollution to the environment, and becomes an important factor for restricting the development of petroleum and natural gas. Petroleum and gas produced water often contains corrosive particles and deposits tend to form between the particles, so under-scale corrosion is an inevitable typical corrosion risk. The scaling occurs in the pipeline, the conveying sectional area is reduced, the conveying efficiency is reduced, and the conveying pipe is blocked and scrapped when serious, so that the safe and efficient operation of the pipeline is affected. Thus, there is a need to develop research into the sensitivity and fouling mechanisms of oil and gas pipeline interiors.
The complex corrosion environment inside the petroleum and natural gas conveying pipeline increases the difficulty of simulation and scale removal of the corrosion working condition. At present, two general descaling methods are mainly used at home and abroad: one is to mechanically remove the sediment in the pipeline periodically by using the spherical pig; the other is to add a scale inhibitor with a certain concentration into water quality by a chemical method. The mechanical scale inhibition process is complex and the economic cost is high; the chemical scale inhibition method has wide application range and simple and convenient operation. The former can affect the integrity of the corrosion inhibitor film and the corrosion rate of the matrix due to the direct contact of the mechanical pig with the inner wall of the pipeline; the latter can inhibit the scaling of water quality at each well section filling point, but the effectiveness of the scale inhibitor cannot be accurately controlled. In addition, the currently used scaling simulation device is provided with a flow loop, the equipment can realize real-time adjustment of environmental parameters of a corrosion system, but once scaling occurs, the equipment is difficult to clean, the experimental repeatability is poor, and the scaling sensitivity and the scaling mechanism are not favorable for in-depth research.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pipeline scaling sensitivity testing device and a using method thereof, wherein the device can truly simulate scaling conditions of working conditions when in use, solves the problem of accurate monitoring of scaling in pipelines under different service working conditions, realizes real-time adjustment of corrosion environment parameters, is easy to clean, and has good experimental repeatability.
The invention relates to a pipeline scaling sensitivity testing device, which comprises a cation solution storage tank and an anion solution storage tank, wherein the cation solution storage tank is connected with a liquid inlet of a liquid mixing device through a first liquid pipeline, the first liquid pipeline is connected with a first liquid phase pump and a first flow regulator, the anion solution storage tank is connected with the liquid inlet of the liquid mixing device through a second liquid pipeline, the second liquid pipeline is connected with a second liquid phase pump and a second flow regulator, a liquid outlet of the liquid mixing device is connected with one end of a testing pipeline, the other end of the testing pipeline is connected with a waste liquid recovery device, the first liquid pipeline or the second liquid pipeline is connected with a first pressure sensor, the testing pipeline is connected with a second pressure sensor, the first pressure sensor and the second pressure sensor are both connected with a differential pressure sensor, the first liquid pipeline is provided with a first heating device, the second liquid pipeline is provided with a second heating device, the first liquid pipeline and the second liquid pipeline are both connected with a temperature sensor, and the temperature sensor are both connected with a temperature sensor.
The pipeline scaling sensitivity testing device further comprises a scale inhibitor solution storage tank, wherein the scale inhibitor solution storage tank is connected with a liquid inlet of the liquid mixing device through a third liquid pipeline, a third liquid pump and a third flow regulator are connected onto the third liquid pipeline, a third heating device is arranged on the third liquid pipeline, and the third liquid pipeline is connected with the temperature sensor.
The pipeline scaling sensitivity testing device further comprises a gas cylinder for containing mixed gas of nitrogen and carbon dioxide, the gas cylinder is connected with a cationic solution storage tank through a first gas inlet pipeline, the cationic solution storage tank is connected with an exhaust gas recovery device through a first gas outlet pipeline, the gas cylinder is connected with an anionic solution storage tank through a second gas inlet pipeline, the anionic solution storage tank is connected with the exhaust gas recovery device through a second gas outlet pipeline, the gas cylinder is connected with a scale inhibitor solution storage tank through a third gas inlet pipeline, the scale inhibitor solution storage tank is connected with the exhaust gas recovery device through a third gas outlet pipeline, the cationic solution storage tank, the anionic solution storage tank and the scale inhibitor solution storage tank all comprise tank bodies and tank covers, the tank covers are installed at openings of the tank bodies in a sealing mode, the first liquid pipeline, the first gas inlet pipeline and the first gas outlet pipeline all penetrate through tank covers of the cationic solution storage tank, the second liquid pipeline, the second gas inlet pipeline and the second gas outlet pipeline all penetrate through tank covers of the anionic solution storage tank, and the third liquid pipeline and the third gas inlet pipeline all penetrate through the scale inhibitor storage tank.
The pipeline scaling sensitivity testing device is characterized in that the liquid mixing device is a three-way ball valve, the first liquid pipeline is connected with a first liquid inlet of the three-way ball valve, the second liquid pipeline is connected with a second liquid inlet of the three-way ball valve, the third liquid pipeline is connected with a third liquid inlet of the three-way ball valve, and a liquid outlet of the three-way ball valve is connected with one end of a testing pipeline.
The pipeline scaling sensitivity testing device further comprises a first box body, the first liquid phase pump, the second liquid phase pump and the third liquid phase pump are all arranged in the first box body, the first flow regulator, the second flow regulator and the third flow regulator are all arranged in the first box body, and the temperature difference sensor, the temperature display and the computer are all arranged on the first box body.
The pipeline scaling sensitivity testing device further comprises a second box body, a heat insulation layer is arranged on the wall of the second box body, the three-way ball valve and the testing pipeline are both arranged in the second box body, a first heating device is arranged on a first liquid pipeline in the second box body, the first heating device is a first heating coil, the first heating coil is wound on the first liquid pipeline, a second heating device is arranged on a second liquid pipeline in the second box body, the second heating coil is wound on the second liquid pipeline, a third heating device is arranged on a third liquid pipeline in the second box body, and the third heating device is a third heating coil which is wound on the third liquid pipeline.
According to the pipeline scaling sensitivity testing device, a liquid outlet of the three-way ball valve is connected with one end of a testing pipeline through a fourth liquid pipeline, a first valve is connected to the fourth liquid pipeline, a fifth liquid pipeline is connected between the fourth liquid pipelines at two ends of the first valve, a second valve and a scale inhibitor are connected to the fifth liquid pipeline, the other end of the testing pipeline is connected with a waste liquid recovery device through a sixth liquid pipeline, a cooling device is connected to the sixth liquid pipeline, and the cooling device is located outside the second box body.
The application method of the pipeline scaling sensitivity testing device comprises the following steps:
opening the covers of the cation solution storage tank and the anion solution storage tank, respectively adding the cation solution and the anion solution into the cation solution storage tank and the anion solution storage tank, then covering the covers of the cation solution storage tank and the anion solution storage tank,
filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution and the anionic solution through the first air inlet pipeline and the second air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
Opening the first valve, closing the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, then the first liquid phase pump and the second liquid phase pump are turned on,
heating the cation solution in the first liquid pipeline by the first heating coil, heating the anion solution in the second liquid pipeline by the second heating coil, preserving heat after heating the cation solution and the anion solution to the required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
The application method of the pipeline scaling sensitivity testing device comprises the following steps:
opening the covers of the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank, respectively adding the cation solution, the anion solution and the scale inhibitor solution into the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank, then covering the covers of the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank,
filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution, the anionic solution and the scale inhibitor solution through the first air inlet pipeline, the second air inlet pipeline and the third air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
opening the first valve, closing the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, the flow rate of the scale inhibitor solution is regulated by the third flow regulator, then the first liquid phase pump, the second liquid phase pump and the third liquid phase pump are turned on,
Heating the cation solution in the first liquid pipeline through the first heating coil, heating the anion solution in the second liquid pipeline through the second heating coil, heating the scale inhibitor solution in the third liquid pipeline through the third heating coil, preserving heat after heating the cation solution, the anion solution and the scale inhibitor solution to required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
The application method of the pipeline scaling sensitivity testing device comprises the following steps:
opening the covers of the cation solution storage tank and the anion solution storage tank, respectively adding the cation solution and the anion solution into the cation solution storage tank and the anion solution storage tank, then covering the covers of the cation solution storage tank and the anion solution storage tank,
Filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution and the anionic solution through the first air inlet pipeline and the second air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
closing the first valve, opening the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, then the first liquid phase pump and the second liquid phase pump are turned on,
heating the cation solution in the first liquid pipeline by the first heating coil, heating the anion solution in the second liquid pipeline by the second heating coil, preserving heat after heating the cation solution and the anion solution to the required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
The invention and its application method are different from the prior art in that the invention is characterized in that when the invention is used, the prepared cation solution and anion solution are respectively added into the cation solution storage tank and anion solution storage tank, then the flow rate of the cation solution and anion solution is adjusted by the flow regulator, then the liquid phase pump is started to convey the cation solution and anion solution to the mixing device for mixing, and the cation solution and anion solution before mixing can be heated to the required temperature value by the heating device, the mixed solution can generate scale when flowing through the test pipeline, and the scale is adhered on the inner pipe wall of the test pipeline, the inner diameter of the test pipeline gradually becomes smaller as the scale becomes thicker, and as the pipe diameter becomes smaller, the pressure is larger, therefore, the pressure difference between the test pipeline and the first liquid pipeline/the second liquid pipeline is measured by the differential pressure sensor, and then the change condition of the difference with time is recorded by the computer: if the difference value gradually increases along with time, the inner diameter of the test pipeline gradually decreases, namely the thickness of the scale gradually increases; conversely, if the difference is unchanged or changed little over time, it is an indication that the inner diameter of the test line is unchanged or changed little, i.e., there is no or little scale on the inner wall of the test line. When the device is cleaned after the pipeline scaling sensitivity testing device is used, only the acid liquor with low concentration is put into the storage tank, then the acid liquor flows through the testing pipeline through the liquid phase pump, and the device can be cleaned for a period of time, and can be reused. Therefore, the device can truly simulate the scaling condition of working conditions when in use, solves the problem of accurate monitoring of scaling in pipelines under different service working conditions, realizes real-time adjustment of corrosion environment parameters, is easy to clean, and has good experimental repeatability.
The invention is further described below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of a pipeline fouling susceptibility testing apparatus according to the present invention;
FIG. 2 is a state diagram showing the time-dependent difference between the second pressure value and the first pressure value according to the present invention.
Detailed Description
As shown in FIG. 1, the pipeline scaling sensitivity test device comprises a cation solution storage tank 57 and an anion solution storage tank 55, wherein the cation solution storage tank 57 is connected with a liquid inlet of a liquid mixing device through a first liquid pipeline 45, the first liquid pipeline 45 is connected with a first liquid phase pump 46 and a first flow regulator 47, the anion solution storage tank 55 is connected with a liquid inlet of the liquid mixing device through a second liquid pipeline 44, the second liquid pipeline 44 is connected with a second liquid phase pump 48 and a second flow regulator 49, a liquid outlet of the liquid mixing device is connected with one end of a test pipeline 38, the other end of the test pipeline 38 is connected with a waste liquid recovery device, the first liquid pipeline 45 or the second liquid pipeline 44 is connected with a first pressure sensor 33, the first pressure sensor 33 is used for measuring the pressure of the first liquid pipeline 45 or the second liquid pipeline 44, the second pressure sensor 34 is connected to the test pipeline 38, the second pressure sensor 34 is used for measuring the pressure of the test pipeline 38, the first pressure sensor 33 and the second pressure sensor 34 are both connected with the differential pressure sensor 21, the differential pressure sensor 21 is connected with the computer 22, the first pressure sensor 33 and the second pressure sensor 34 are used for transmitting measured pressure values to the differential pressure sensor 21, the differential pressure sensor 21 is used for differencing the pressure values measured by the second pressure sensor 34 and the first pressure sensor 33 and transmitting the obtained difference value to the computer 22, and the computer 22 is used for recording the change condition of the difference value along with time.
The first liquid pipeline 45 is provided with a first heating device, and the first heating device is used for heating the cation solution flowing through the first liquid pipeline 45. The second liquid pipeline 44 is provided with a second heating device, and the second heating device is used for heating the anion solution flowing through the second liquid pipeline 44. The first liquid line 45 and the second liquid line 44 are each connected to the temperature sensor 32, and the temperature sensor 32 is connected to the temperature display 24. The temperature sensor 32 is used to measure the temperature of the cationic solution in the first liquid line 45 and the anionic solution in the second liquid line 44 and to transmit the measured temperature values to the temperature display 24 for display.
The device for testing the scale sensitivity of the pipeline further comprises a scale inhibitor solution storage tank 53, wherein the scale inhibitor solution storage tank 53 is connected with a liquid inlet of the liquid mixing device through a third liquid pipeline 25, a third liquid pump 50 and a third flow regulator 51 are connected to the third liquid pipeline 25, a third heating device is arranged on the third liquid pipeline 25, and the third liquid pipeline 25 is connected with the temperature sensor 32. The third heating device is used for heating the scale inhibitor solution flowing through the third liquid pipeline 25, and the temperature sensor 32 is used for measuring the temperature of the scale inhibitor solution in the third liquid pipeline 25 and transmitting the measured temperature value to the temperature display 24 for displaying.
The pipeline scaling sensitivity testing device further comprises a gas cylinder 10 for containing mixed gas of nitrogen and carbon dioxide, wherein the gas cylinder 10 is connected with a cation solution storage tank 57 through a first gas inlet pipeline 56, the cation solution storage tank 57 is connected with an exhaust gas recovery device through a first gas outlet pipeline 15, the gas cylinder 10 is connected with an anion solution storage tank 55 through a second gas inlet pipeline 54, the anion solution storage tank 55 is connected with the exhaust gas recovery device through a second gas outlet pipeline 17, the gas cylinder 10 is connected with a scale inhibitor solution storage tank 53 through a third gas inlet pipeline 18, and the scale inhibitor solution storage tank 53 is connected with the exhaust gas recovery device through a third gas outlet pipeline 19.
The concrete way in which the gas cylinder 10 is connected to the cation solution reservoir 57, the anion solution reservoir 55 and the scale inhibitor solution reservoir 53 through the first gas inlet line 56, the second gas inlet line 54 and the third gas inlet line 18, respectively, is as follows: the gas cylinder 10 is connected with a total gas inlet pipeline 12, the first gas inlet pipeline 56, the second gas inlet pipeline 54 and the third gas inlet pipeline 18 are respectively connected with the total gas inlet pipeline 12, that is, the gas cylinder 10 is connected with the first gas inlet pipeline 56, the second gas inlet pipeline 54 and the third gas inlet pipeline 18 through the total gas inlet pipeline 12, the total gas inlet pipeline 12 is connected with a pressure reducing valve 11 and a total control valve 13, the pressure reducing valve 11 is arranged close to the gas cylinder 10, and the first gas inlet pipeline 56, the second gas inlet pipeline 54 and the third gas inlet pipeline 18 are respectively connected with a sub control valve 16.
The pressure reducing valve 11 is used for reducing the pressure of the mixed gas of the nitrogen and the carbon dioxide discharged from the gas cylinder 10 so that the pressure of the mixed gas meets the experimental requirements. The main control valve 13 can control the opening and closing of the main air inlet pipeline 12, and the sub control valves 16 on the first air inlet pipeline 56, the second air inlet pipeline 54 and the third air inlet pipeline 18 can respectively control the opening and closing of the respective air inlet pipelines.
The cation solution storage tank 57, the anion solution storage tank 55 and the scale inhibitor solution storage tank 53 are connected with the exhaust gas recovery device through the first air outlet pipeline 15, the second air outlet pipeline 17 and the third air outlet pipeline 19 respectively in the following specific ways: the first air outlet pipeline 15, the second air outlet pipeline 17 and the third air outlet pipeline 19 are respectively connected to a total air outlet pipeline 20, and the total air outlet pipeline 20 is connected with the waste gas recovery device, that is, the first air outlet pipeline 15, the second air outlet pipeline 17 and the third air outlet pipeline 19 are all connected with the waste gas recovery device through the total air outlet pipeline 20.
The cation solution storage tank 57, the anion solution storage tank 55 and the scale inhibitor solution storage tank 53 all comprise a tank body 58 and a tank cover 14, the tank cover 14 is arranged at the opening of the tank body 58 in a sealing way, the tank cover 14 is connected at the opening of the tank body 58 in a threaded way, and a sealing ring is arranged between the tank cover 14 and the opening of the tank body 58. The first liquid line 45, the first air inlet line 56 and the first air outlet line 15 all pass through the tank cover 14 of the cation solution storage tank 57, the second liquid line 44, the second air inlet line 54 and the second air outlet line 17 all pass through the tank cover 14 of the anion solution storage tank 55, and the third liquid line 25, the third air inlet line 18 and the third air outlet line 19 all pass through the tank cover 14 of the scale inhibitor solution storage tank 53.
In the present embodiment, the exhaust gas recovery device is an exhaust gas recovery tank 52, and the structure of the exhaust gas recovery tank 52 is the same as that of the cation solution storage tank 57/anion solution storage tank 55/scale inhibitor solution storage tank 53, and the total gas outlet pipe 20 passes through the tank cover 14 of the exhaust gas recovery tank 52.
The pipeline scaling sensitivity testing device is characterized in that the liquid mixing device is a three-way ball valve 41, the first liquid pipeline 45 is connected with a first liquid inlet of the three-way ball valve 41, the second liquid pipeline 44 is connected with a second liquid inlet of the three-way ball valve 41, the third liquid pipeline 25 is connected with a third liquid inlet of the three-way ball valve 41, and a liquid outlet of the three-way ball valve 41 is connected with one end of a testing pipeline 38. The three-way ball valve 41 is a prior art valve that functions to mix the cationic solution, the anionic solution, and the scale inhibitor solution flowing from the first liquid line 45, the second liquid line 44, and the third liquid line 25, respectively, and then the mixed liquid flows out from the liquid outlet and into the test line 38.
The pipeline scaling sensitivity testing device further comprises a first box body 23, wherein the first liquid phase pump 46, the second liquid phase pump 48 and the third liquid phase pump 50 are arranged in the first box body 23, the first flow regulator 47, the second flow regulator 49 and the third flow regulator 51 are also arranged in the first box body 23, and the temperature difference sensor, the temperature display 24 and the computer 22 are arranged on the first box body 23.
The pipeline scaling sensitivity testing device further comprises a second box body 31, wherein a heat insulation layer 26 is arranged on the box wall of the second box body 31, and the heat insulation layer 26 plays a role in heat preservation of the second box body 31. The three-way ball valve 41 and the test pipeline 38 are both arranged in the second box body 31, a first heating device is arranged on a first liquid pipeline 45 positioned in the second box body 31, the first heating device is a first heating coil 43, the first heating coil 43 is wound on the first liquid pipeline 45, a second heating device is arranged on a second liquid pipeline 44 positioned in the second box body 31, the second heating device is a second heating coil 42, the second heating coil 42 is wound on the second liquid pipeline 44, a third heating device is arranged on a third liquid pipeline 25 positioned in the second box body 31, the third heating device is a third heating coil 27, and the third heating coil 27 is wound on the third liquid pipeline 25.
In the present embodiment, the first pressure sensor 33, the second pressure sensor 34, and the temperature sensor 32 are provided on the outer tank wall of the second tank 31.
According to the pipeline scaling sensitivity testing device, a liquid outlet of the three-way ball valve 41 is connected with one end of a testing pipeline 38 through a fourth liquid pipeline 39, a first valve 40 is connected to the fourth liquid pipeline 39, a fifth liquid pipeline 30 is connected between the fourth liquid pipelines 39 at two ends of the first valve 40, a second valve 28 and a scale inhibitor 29 are connected to the fifth liquid pipeline 30, the other end of the testing pipeline 38 is connected with a waste liquid recovery device through a sixth liquid pipeline 36, a cooling device 35 is connected to the sixth liquid pipeline 36, and the cooling device 35 is located outside the second box 31.
When the first valve 40 is opened and the second valve 28 is closed, the mixed liquid from the three-way ball valve 41 flows into the test pipeline 38 through the fourth liquid pipeline 39; when the second valve 28 is opened and the first valve 40 is closed, the mixed liquid from the three-way ball valve 41 flows into the test line 38 after passing through the scale inhibitor 29 on the fifth liquid line 30.
In this embodiment, the waste liquid recovery device is a waste liquid recovery tank 37. The cooling device 35 is a prior art, and may be either an air cooling device or a water cooling device. The scale inhibitor 29 is also of the prior art, and the specific structure and working principle thereof will not be described again.
As shown in fig. 1, the method for using the device for testing the scale sensitivity of the pipeline in the invention comprises the following steps:
opening the covers 14 of the cation solution storage tank 57 and the anion solution storage tank 55, adding the cation solution and the anion solution into the cation solution storage tank 57 and the anion solution storage tank 55, respectively, and then covering the covers 14 of the cation solution storage tank 57 and the anion solution storage tank 55,
filling mixed gas of nitrogen and carbon dioxide into the gas cylinder 10, opening the gas cylinder 10, allowing the mixed gas of nitrogen and carbon dioxide in the gas cylinder 10 to enter into a cationic solution and an anionic solution through a first gas inlet pipeline 56 and a second gas inlet pipeline 54 respectively to deoxidize, closing the gas cylinder 10 after a period of time (at least half an hour),
Opening the first valve 40 and closing the second valve 28, allows the mixed liquor of cationic solution and anionic solution exiting the three-way ball valve 41 to pass through the fourth liquid line 39 into the test line 38, without flowing through the scale inhibitor 29,
the flow rate of the cationic solution is adjusted by the first flow regulator 47, the flow rate of the anionic solution is adjusted by the second flow regulator 49, then the first liquid phase pump 46 and the second liquid phase pump 48 are turned on, under the action of the first liquid phase pump 46, the cationic solution in the cationic solution storage tank 57 enters the three-way ball valve 41 through the first liquid pipeline 45, under the action of the second liquid phase pump 48, the anionic solution in the anionic solution storage tank 55 enters the three-way ball valve 41 through the second liquid pipeline 44, the cationic solution and the anionic solution in the three-way ball valve 41 are mixed, the mixed liquid enters the test pipeline 38 through the fourth liquid pipeline 39, the liquid discharged from the test pipeline 38 enters the waste liquid recovery tank 37 through the sixth liquid pipeline 36,
the cation solution in the first liquid pipeline 45 is heated by the first heating coil 43, the anion solution in the second liquid pipeline 44 is heated by the second heating coil 42, the temperature is kept after the cation solution and the anion solution are heated to the required temperature, the cation solution and the anion solution heated to the required temperature are mixed in the three-way ball valve 41, the mixed liquid can chemically react to generate scale when flowing through the test pipeline 38, the scale can be attached to the inner pipe wall of the test pipeline 38,
The pressure value of the first liquid pipeline 45 or the second liquid pipeline 44 is measured through the first pressure sensor 33 and is recorded as a first pressure value, the pressure value of the test pipeline 38 is measured through the second pressure sensor 34 and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor 21 through the first pressure sensor 33, the second pressure value is transmitted to the differential pressure sensor 21 through the second pressure sensor 34, the differential pressure is obtained by differentiating the second pressure value and the first pressure value through the differential pressure sensor 21, the differential pressure is transmitted to the computer 22 through the differential pressure sensor 21, and finally the change condition of the differential pressure with time is recorded through the computer 22.
The application method can be used for carrying out simulation research work of scaling in the petroleum and natural gas pipeline in a laboratory, acquiring in-situ scaling information, making up the defects of petroleum and natural gas pipeline scaling research equipment and providing equipment foundation for deep research of scaling sensitivity and mechanism.
Wherein, the cation solution can be mixed solution of calcium chloride and magnesium chloride, the anion solution can be mixed solution of sodium carbonate, sodium bicarbonate and sodium sulfate, and the ratio relation of each component in the cation solution and the anion solution can be determined by staff according to specific experimental requirements.
When the deoxidation is carried out, the total control valve 13 on the total air inlet pipeline 12 and the branch control valves 16 on the first air inlet pipeline 56 and the second air inlet pipeline 54 are opened, so that the mixed gas of nitrogen and carbon dioxide is introduced into the cation solution in the cation solution storage tank 57 for deoxidation, and meanwhile, the mixed gas of nitrogen and carbon dioxide is also introduced into the anion solution in the anion solution storage tank 55 for deoxidation. The deoxidized gas in the cation solution storage tank 57 enters the total gas outlet pipeline 20 through the first gas outlet pipeline 15, and then enters the waste gas recovery tank 52 from the total gas outlet pipeline 20; the deaerated gas in the anion solution storage tank 55 enters the total gas outlet pipe 20 through the second gas outlet pipe 17, and then enters the exhaust gas recovery tank 52 from the total gas outlet pipe 20. After the deoxidation is completed, the gas cylinder 10 can be closed by closing the master control valve 13 on the master gas inlet pipeline 12, and of course, the sub-control valves 16 on the first gas inlet pipeline 56 and the second gas inlet pipeline 54 can be closed at the same time.
When the pipe scale sensitivity testing device is used, the prepared cation solution and anion solution are respectively added into a cation solution storage tank 57 and an anion solution storage tank 55, then the flow rates of the cation solution and the anion solution are regulated by a flow regulator, then a liquid phase pump is started to convey the cation solution and the anion solution to a liquid mixing device for mixing, the cation solution and the anion solution before mixing can be heated to required temperature values by a heating device, scale is generated when the mixed solution flows through a testing pipeline 38, the scale adheres to the inner pipe wall of the testing pipeline 38, the inner diameter of the testing pipeline 38 is gradually reduced along with the gradual thickening of the scale, and as the pipe diameter is smaller, the pressure is larger under the condition of a certain flow rate, so the pressure difference between the testing pipeline 38 and a first liquid pipeline 45/a second liquid pipeline 44 is measured by a pressure difference sensor 21, and the change condition of the difference with time is recorded by a computer 22: if the difference gradually increases over time, it is indicated that the inner diameter of the test line 38 gradually decreases, i.e., the thickness of scale gradually increases; conversely, if the difference is unchanged or changes little over time, it is an indication that the inner diameter of the test line 38 is unchanged or changes little, i.e., there is no or little scale on the inner wall of the test line 38. When the device is cleaned after the pipeline scaling sensitivity testing device is used, only a low-concentration acid liquid is put into the storage tank, then the acid liquid flows through the testing pipeline 38 through the liquid phase pump, and the device can be cleaned for a period of time, so that the device can be reused. Therefore, the device can truly simulate the scaling condition of working conditions when in use, solves the problem of accurate monitoring of scaling in pipelines under different service working conditions, realizes real-time adjustment of corrosion environment parameters, is easy to clean, and has good experimental repeatability.
The pipeline scaling sensitivity testing device can also detect the performance of the scale inhibitor, and the specific method is as follows:
the application method of the pipeline scaling sensitivity testing device comprises the following steps:
opening the covers 14 of the cation solution storage tank 57, the anion solution storage tank 55 and the scale inhibitor solution storage tank 53, adding the cation solution, the anion solution and the scale inhibitor solution (the scale inhibitor solution is the prior art, and the components thereof are not repeated) into the cation solution storage tank 57, the anion solution storage tank 55 and the scale inhibitor solution storage tank 53, respectively, then covering the covers 14 of the cation solution storage tank 57, the anion solution storage tank 55 and the scale inhibitor solution storage tank 53,
filling mixed gas of nitrogen and carbon dioxide into the gas cylinder 10, opening the gas cylinder 10, allowing the mixed gas of nitrogen and carbon dioxide in the gas cylinder 10 to enter the cationic solution, the anionic solution and the scale inhibitor solution through the first gas inlet pipeline 56, the second gas inlet pipeline 54 and the third gas inlet pipeline 18 respectively for deoxidizing, closing the gas cylinder 10 after a period of time (at least half an hour),
opening the first valve 40 and closing the second valve 28 allows the mixed liquor of cationic solution, anionic solution and scale inhibitor solution exiting the three-way ball valve 41 to pass through the fourth liquid line 39 into the test line 38, without flowing through the scale inhibitor 29,
The flow rate of the cationic solution is adjusted by the first flow regulator 47, the flow rate of the anionic solution is adjusted by the second flow regulator 49, the flow rate of the scale inhibitor solution is adjusted by the third flow regulator 51, then the first liquid phase pump 46, the second liquid phase pump 48 and the third liquid phase pump 50 are opened, under the action of the first liquid phase pump 46, the cationic solution in the cationic solution storage tank 57 enters the three-way ball valve 41 through the first liquid pipeline 45, under the action of the second liquid phase pump 48, the anionic solution in the anionic solution storage tank 55 enters the three-way ball valve 41 through the second liquid pipeline 44, under the action of the third liquid phase pump 50, the scale inhibitor solution in the scale inhibitor solution storage tank 53 enters the three-way ball valve 41 through the third liquid pipeline 25, the cationic solution, the anionic solution and the scale inhibitor solution which enter the three-way ball valve 41 are mixed, then the mixed liquid enters the test pipeline 38 through the fourth liquid pipeline 39, the liquid which exits the test pipeline 38 enters the waste liquid recovery tank 37 through the sixth liquid pipeline 36,
heating the cationic solution in the first liquid line 45 by the first heating coil 43, heating the anionic solution in the second liquid line 44 by the second heating coil 42, heating the scale inhibitor solution in the third liquid line 25 by the third heating coil 27, maintaining the temperature after heating the cationic solution, the anionic solution and the scale inhibitor solution to the desired temperature,
The pressure value of the first liquid pipeline 45 or the second liquid pipeline 44 is measured through the first pressure sensor 33 and is recorded as a first pressure value, the pressure value of the test pipeline 38 is measured through the second pressure sensor 34 and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor 21 through the first pressure sensor 33, the second pressure value is transmitted to the differential pressure sensor 21 through the second pressure sensor 34, the differential pressure is obtained by differentiating the second pressure value and the first pressure value through the differential pressure sensor 21, the differential pressure is transmitted to the computer 22 through the differential pressure sensor 21, and finally the change condition of the differential pressure with time is recorded through the computer 22.
When deoxidizing, the total control valve 13 on the total air inlet pipeline 12 and the branch control valves 16 on the first air inlet pipeline 56, the second air inlet pipeline 54 and the third air inlet pipeline 18 are opened, so that the mixed gas of nitrogen and carbon dioxide is introduced into the cation solution in the cation solution storage tank 57 for deoxidizing, and meanwhile, the mixed gas of nitrogen and carbon dioxide is introduced into the anion solution in the anion solution storage tank 55 for deoxidizing, and meanwhile, the mixed gas of nitrogen and carbon dioxide is introduced into the scale inhibitor solution in the scale inhibitor solution storage tank 53 for deoxidizing. The deoxidized gas in the cation solution storage tank 57 enters the total gas outlet pipeline 20 through the first gas outlet pipeline 15, and then enters the waste gas recovery tank 52 from the total gas outlet pipeline 20; the deoxidized gas in the anion solution storage tank 55 enters the total gas outlet pipeline 20 through the second gas outlet pipeline 17, and then enters the waste gas recovery tank 52 from the total gas outlet pipeline 20; the deoxygenated gas in the scale inhibitor solution storage tank 53 enters the total gas outlet pipeline 20 through the third gas outlet pipeline 19, and then enters the exhaust gas recovery tank 52 from the total gas outlet pipeline 20. After the deoxidation is completed, the gas cylinder 10 can be closed by closing the master control valve 13 on the master gas inlet pipeline 12, and of course, the sub-control valves 16 on the first gas inlet pipeline 56, the second gas inlet pipeline 54 and the third gas inlet pipeline 18 can be closed at the same time.
Because the scale inhibitor solution is added to the mixed liquid of the cation solution and the anion solution, under the same conditions, the thickness of scale formed by the cation, anion and scale inhibitor mixed solution in the test pipeline 38 is smaller than the thickness of scale formed by the cation and anion mixed solution in the test pipeline 38, that is, the inner diameter of the test pipeline 38 when the cation, anion and scale inhibitor mixed solution flows is larger than the inner diameter of the test pipeline 38 when the cation, anion and scale inhibitor mixed solution flows. Thus, when the test line 38 is flowing a mixed solution of cations, anions, and scale inhibitor, the difference between the second pressure value and the first pressure value is noted as a first difference, and when the test line 38 is flowing a mixed solution of cations and anions, the difference between the second pressure value and the first pressure value is noted as a second difference, and since the inner diameter of the test line 38 is greater when flowing a mixed solution of cations, anions, and scale inhibitor than when flowing a mixed solution of cations and anions, the first difference is less than the second difference.
As shown in FIG. 2, when the scale inhibitor was not added, the flow rates of the cationic solution and the anionic solution were set to 0.5m/s for 0 to 30 minutes and 1.0m/s for 30 to 60 minutes, respectively. The difference between the second pressure value and the first pressure value gradually increases within 5 minutes of the start of the experiment, indicating that the scale thickness on the inner wall of the test line 38 also gradually increases, and then the difference between the second pressure value and the first pressure value does not change much within 5-30 minutes, indicating that the scale thickness on the inner wall of the test line 38 does not substantially change. At 30 minutes, the flow rate suddenly increases, which results in a sudden increase in the difference between the second pressure value and the first pressure value, after which the difference between the second pressure value and the first pressure value does not change much in 30-60 minutes, which also indicates that the scale thickness on the inner wall of the test line 38 does not change much, which also indicates that the liquid flow rate increases and does not have a significant effect on the scale thickness.
After the scale inhibitor is added, the change trend of the difference value of the second pressure value and the first pressure value along with time is basically consistent with that of the difference value without the scale inhibitor, but the difference value after the scale inhibitor is added at the same time is smaller than that without the scale inhibitor, namely, the first difference value is smaller than the second difference value, and if the difference between the first difference value and the second difference value is larger, the better performance of the scale inhibitor is indicated; conversely, if the difference between the first difference and the second difference is smaller, the performance of the scale inhibitor is poorer.
The pipe scale sensitivity test apparatus of the present invention is also capable of detecting the performance of the scale inhibitor 29 by the following method:
the application method of the pipeline scaling sensitivity testing device comprises the following steps:
opening the covers 14 of the cation solution storage tank 57 and the anion solution storage tank 55, adding the cation solution and the anion solution into the cation solution storage tank 57 and the anion solution storage tank 55, respectively, and then covering the covers 14 of the cation solution storage tank 57 and the anion solution storage tank 55,
filling mixed gas of nitrogen and carbon dioxide into the gas cylinder 10, opening the gas cylinder 10, allowing the mixed gas of nitrogen and carbon dioxide in the gas cylinder 10 to enter into a cationic solution and an anionic solution through a first gas inlet pipeline 56 and a second gas inlet pipeline 54 respectively to deoxidize, closing the gas cylinder 10 after a period of time (at least half an hour),
The first valve 40 is closed, the second valve 28 is opened, so that the mixed solution of cations and anions from the three-way ball valve 41 can flow into the test pipeline 38 after passing through the scale inhibitor 29 on the fifth liquid pipeline 30,
the flow rate of the cationic solution is adjusted by the first flow rate adjuster 47, the flow rate of the anionic solution is adjusted by the second flow rate adjuster 49, and then the first liquid phase pump 46 and the second liquid phase pump 48 are turned on,
the cationic solution in the first liquid line 45 is heated by the first heating coil 43, the anionic solution in the second liquid line 44 is heated by the second heating coil 42, and after the cationic solution and the anionic solution are heated to the desired temperature, the temperature is maintained,
the pressure value of the first liquid pipeline 45 or the second liquid pipeline 44 is measured through the first pressure sensor 33 and is recorded as a first pressure value, the pressure value of the test pipeline 38 is measured through the second pressure sensor 34 and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor 21 through the first pressure sensor 33, the second pressure value is transmitted to the differential pressure sensor 21 through the second pressure sensor 34, the differential pressure is obtained by differentiating the second pressure value and the first pressure value through the differential pressure sensor 21, the differential pressure is transmitted to the computer 22 through the differential pressure sensor 21, and finally the change condition of the differential pressure with time is recorded through the computer 22.
The performance detection of the scale inhibitor 29 is the same as the performance detection principle of the scale inhibitor, and will not be described here again.
It should be noted that, the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (10)
1. A pipeline scale deposit sensitivity testing arrangement, its characterized in that: including cation solution holding vessel and anion solution holding vessel, the cation solution holding vessel is connected with the inlet of mixing the liquid device through first liquid pipeline, be connected with first liquid pump and first flow regulator on the first liquid pipeline, the anion solution holding vessel is connected with the inlet of mixing the liquid device through the second liquid pipeline, be connected with second liquid pump and second flow regulator on the second liquid pipeline, the liquid outlet of mixing the liquid device is connected with one end of test pipeline, the other end of test pipeline is connected with waste liquid recovery unit, be connected with first pressure sensor on first liquid pipeline or the second liquid pipeline, be connected with second pressure sensor on the test pipeline, first pressure sensor and second pressure sensor all are connected with pressure differential sensor, pressure differential sensor is connected with the computer, be equipped with first heating device on the first liquid pipeline, be equipped with second heating device on the second liquid pipeline, first liquid pipeline and second liquid pipeline all are connected with temperature sensor, temperature sensor is connected with temperature sensor.
2. The pipe fouling susceptibility testing apparatus of claim 1, wherein: the scale inhibitor solution storage tank is connected with a liquid inlet of the liquid mixing device through a third liquid pipeline, a third liquid pump and a third flow regulator are connected to the third liquid pipeline, a third heating device is arranged on the third liquid pipeline, and the third liquid pipeline is connected with the temperature sensor.
3. The pipe fouling susceptibility testing apparatus of claim 2, wherein: the device also comprises a gas cylinder for containing the mixed gas of nitrogen and carbon dioxide, the gas cylinder is connected with a cation solution storage tank through a first air inlet pipeline, the cation solution storage tank is connected with an exhaust gas recovery device through a first air outlet pipeline, the gas cylinder is connected with an anion solution storage tank through a second air inlet pipeline, the anion solution storage tank is connected with the exhaust gas recovery device through a second air outlet pipeline, the gas cylinder is connected with a scale inhibitor solution storage tank through a third air inlet pipeline, the scale inhibitor solution storage tank is connected with the exhaust gas recovery device through a third air outlet pipeline, the cation solution holding vessel, anion solution holding vessel and scale inhibitor solution holding vessel all include a jar body and a cover, the opening part at the jar body is installed to the cover seal, first liquid pipeline, first inlet tube way and first outlet tube way all pass the cover of cation solution holding vessel, second liquid pipeline, second inlet tube way and second outlet tube way all pass the cover of anion solution holding vessel, third liquid pipeline, third inlet tube way and third outlet tube way all pass the cover of scale inhibitor solution holding vessel.
4. A pipe fouling susceptibility testing device according to claim 3, wherein: the liquid mixing device is a three-way ball valve, the first liquid pipeline is connected with a first liquid inlet of the three-way ball valve, the second liquid pipeline is connected with a second liquid inlet of the three-way ball valve, the third liquid pipeline is connected with a third liquid inlet of the three-way ball valve, and a liquid outlet of the three-way ball valve is connected with one end of the test pipeline.
5. The pipe fouling susceptibility testing apparatus of claim 4, wherein: still include first box, first liquid phase pump, second liquid phase pump and third liquid phase pump all establish in first box, first flow regulator, second flow regulator and third flow regulator also all establish in first box, temperature difference sensor, temperature display and computer all establish on first box.
6. The pipe fouling susceptibility testing apparatus of claim 5, wherein: still include the second box, be equipped with the insulating layer on the wall of second box, tee bend ball valve and test pipeline all are established in the second box, are located and are equipped with first heating device on the first liquid pipeline of second box, first heating device is first heating coil, first heating coil winding is on first liquid pipeline, is located and is equipped with second heating device on the second liquid pipeline of second box, second heating device is the second heating coil, second heating coil winding is on the second liquid pipeline, is located and is equipped with third heating device on the third liquid pipeline of second box, third heating device is third heating coil, third heating coil winding is on the third liquid pipeline.
7. The pipe fouling susceptibility testing apparatus of claim 6, wherein: the liquid outlet of tee bend ball valve is connected with the one end of test pipeline through fourth liquid pipeline, be connected with first valve on the fourth liquid pipeline, be connected with the fifth liquid pipeline between the fourth liquid pipeline at first valve both ends, be connected with second valve and scale inhibitor on the fifth liquid pipeline, the other end of test pipeline is connected with waste liquid recovery unit through the sixth liquid pipeline, be connected with cooling device on the sixth liquid pipeline, cooling device is located the outside of second box.
8. A method of using the pipe fouling susceptibility testing apparatus of any one of claims 1-7, comprising the steps of:
opening the covers of the cation solution storage tank and the anion solution storage tank, respectively adding the cation solution and the anion solution into the cation solution storage tank and the anion solution storage tank, then covering the covers of the cation solution storage tank and the anion solution storage tank,
filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution and the anionic solution through the first air inlet pipeline and the second air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
Opening the first valve, closing the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, then the first liquid phase pump and the second liquid phase pump are turned on,
heating the cation solution in the first liquid pipeline by the first heating coil, heating the anion solution in the second liquid pipeline by the second heating coil, preserving heat after heating the cation solution and the anion solution to the required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
9. A method of using the pipe fouling susceptibility testing apparatus of any one of claims 1-7, comprising the steps of:
opening the covers of the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank, respectively adding the cation solution, the anion solution and the scale inhibitor solution into the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank, then covering the covers of the cation solution storage tank, the anion solution storage tank and the scale inhibitor solution storage tank,
filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution, the anionic solution and the scale inhibitor solution through the first air inlet pipeline, the second air inlet pipeline and the third air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
opening the first valve, closing the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, the flow rate of the scale inhibitor solution is regulated by the third flow regulator, then the first liquid phase pump, the second liquid phase pump and the third liquid phase pump are turned on,
Heating the cation solution in the first liquid pipeline through the first heating coil, heating the anion solution in the second liquid pipeline through the second heating coil, heating the scale inhibitor solution in the third liquid pipeline through the third heating coil, preserving heat after heating the cation solution, the anion solution and the scale inhibitor solution to required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
10. A method of using the pipe fouling susceptibility testing apparatus of any one of claims 1-7, comprising the steps of:
Opening the covers of the cation solution storage tank and the anion solution storage tank, respectively adding the cation solution and the anion solution into the cation solution storage tank and the anion solution storage tank, then covering the covers of the cation solution storage tank and the anion solution storage tank,
filling the mixed gas of nitrogen and carbon dioxide into the gas cylinder, then opening the gas cylinder, enabling the mixed gas of nitrogen and carbon dioxide in the gas cylinder to enter into the cationic solution and the anionic solution through the first air inlet pipeline and the second air inlet pipeline respectively for deoxidizing, closing the gas cylinder after a period of time,
closing the first valve, opening the second valve,
the flow rate of the cationic solution is regulated by the first flow regulator, the flow rate of the anionic solution is regulated by the second flow regulator, then the first liquid phase pump and the second liquid phase pump are turned on,
heating the cation solution in the first liquid pipeline by the first heating coil, heating the anion solution in the second liquid pipeline by the second heating coil, preserving heat after heating the cation solution and the anion solution to the required temperature,
the pressure value of the first liquid pipeline or the second liquid pipeline is measured through the first pressure sensor and is recorded as a first pressure value, the pressure value of the test pipeline is measured through the second pressure sensor and is recorded as a second pressure value, the first pressure value is transmitted to the differential pressure sensor through the first pressure sensor, the second pressure value is transmitted to the differential pressure sensor through the second pressure sensor, the differential pressure sensor is used for differentiating the second pressure value from the first pressure value to obtain a differential value, the differential value is transmitted to the computer through the differential pressure sensor, and finally the change condition of the differential value along with time is recorded through the computer.
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| CN205384271U (en) * | 2016-03-08 | 2016-07-13 | 中国石油天然气股份有限公司 | Developments tubular anti -scaling agent rating of merit system |
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