CN105334145A - Wax deposition experimental device and method - Google Patents
Wax deposition experimental device and method Download PDFInfo
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- CN105334145A CN105334145A CN201510881652.5A CN201510881652A CN105334145A CN 105334145 A CN105334145 A CN 105334145A CN 201510881652 A CN201510881652 A CN 201510881652A CN 105334145 A CN105334145 A CN 105334145A
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- 230000008021 deposition Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000002474 experimental method Methods 0.000 claims description 40
- 238000001556 precipitation Methods 0.000 claims description 11
- 239000006071 cream Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 53
- 235000019198 oils Nutrition 0.000 abstract description 53
- 239000010779 crude oil Substances 0.000 abstract description 19
- 235000019476 oil-water mixture Nutrition 0.000 abstract description 6
- 239000011229 interlayer Substances 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000001993 wax Substances 0.000 description 107
- 239000013049 sediment Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 8
- 230000000704 physical effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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Abstract
The invention provides a wax deposition experimental device and method. The wax deposition experimental device comprises an oil storage tank, a cold finger and a stirrer. The oil storage tank is provided with an oil storage cavity and sleeved with a water jacket interlayer, and the water jacket interlayer is connected with a first temperature control device. The cold finger is arranged in the oil storage cavity and is provided with an inner cylinder and an outer cylinder which is arranged outside the inner cylinder in a sleeving mode, an annular cavity is formed between the inner cylinder and the outer cylinder, and the annular cavity is connected with a second temperature control device. The stirrer is provided with a rotating shaft penetrating in the inner cylinder, and the end, penetrating out of the inner cylinder, of the rotating shaft is connected with a plurality of stirring paddles. The stirring paddles are located between the outer peripheral wall of the cold finger and the inner peripheral wall of the oil storage tank. According to the wax deposition experimental device and method, the wax deposition laws of crude oil and an oil-water mixture under the flowing condition can be determined, and it is of great significance to pipeline safety and economic operation.
Description
Technical field
The present invention has about a kind of experimental provision and experimental technique, especially has about a kind of wax deposition experimental device and the experimental technique of studying wax deposit under oil flow condition.
Background technology
Waxy crude oil is a kind of mixed system of complexity, and it forms primarily of wax, colloid, aromatic hydrocarbon, pitch and light hydrocarbon component.When temperature is higher, the wax component in crude oil is in dissolved state, and crude oil presents Newtonian fluid rheological properties, and along with the reduction of temperature, the crystallization separating out gradually of wax component, viscosity of crude increases thereupon, and has the characteristic of non-Newtonian fluid.When the amount that wax partial crystallization goes out reaches 2% ~ 3%, just can form tridimensional network, the crude oil of liquid state is wrapped in wherein, hinder it to flow, cause crude oil entirety to lose flowability.
Compared with when managing defeated waxy crude oil under low ambient temperature, the tube wall that the wax in crude oil can be deposited on low temperature forms sediment.All be dissolved with certain wax in most crude oil, these waxes are all in equilibrium state and can not separate out.But when pressure and temperature condition changes time, wax is just very possible separates out, and is deposited on tube wall.Temperature affects the most important factor of wax deposit, and the solubleness of macromolecule paraffin reduces along with the reduction of temperature, finally causes separating out.Above wax deposit process brings series of problems to Cemented filling waxy crude oil: effective internal diameter of pipeline reduces, and discharge pressure increases, and pipeline transmission capacity reduces, and pigging frequency increases, and even causes paraffin blockage accident.And manage defeated waxy crude oil under lower departures oil temperature and running with low flux situation, easily occur the change of flow pattern and fluidised form, this can affect the pressure drop of pipeline, increases the operating cost of pipeline.Wax deposit problem is the major issue affecting pipe safety, economy, Effec-tive Function thus.Therefore, the research carrying out wax deposit, to saving conduit running expense, guarantees that pipe safety conveying has significant realistic meaning.
Summary of the invention
The object of this invention is to provide a kind of wax deposition experimental device, it can measure the wax deposition of crude oil under the flow conditions and oil water mixture, has great importance for pipe safety, economical operation.
Another object of the present invention is to provide a kind of wax deposit experimental technique, and it can measure the wax deposition of crude oil under the flow conditions and oil water mixture, has great importance for pipe safety, economical operation.
Above-mentioned purpose of the present invention can adopt following technical proposal to realize:
The invention provides a kind of wax deposition experimental device, described wax deposition experimental device comprises:
Storage tank, it has shoe cream room, is arranged with water jacket samdwich outside described storage tank, and described water jacket samdwich is connected with the first thermostat;
Cold finger, it is arranged in described shoe cream room, and described cold finger has inner core and is set in the urceolus outside described inner core, and be formed with toroidal cavity between described inner core and described urceolus, described toroidal cavity is connected with the second thermostat;
Stirrer, it has the rotating shaft be located in described inner core, and one end that described rotating shaft passes described inner core is connected with multiple paddle, and described paddle is between the periphery wall and the internal perisporium of described storage tank of described cold finger.
In a preferred embodiment, be connected with connecting rod between described paddle and described rotating shaft, described paddle is arranged on described connecting rod movably.
In a preferred embodiment, heat-insulation layer is arranged with outside described water jacket samdwich.
In a preferred embodiment, temperature sensor is provided with in described storage tank.
In a preferred embodiment, the rotating shaft of described stirrer is connected with a motor.
The present invention also provides a kind of experimental technique adopting wax deposition experimental device as above, and described experimental technique comprises the steps:
A) by the first thermostat, the oil product temperature in storage tank is controlled in an experimental temperature;
B) temperature of the water of the toroidal cavity between the inner core of cold finger and urceolus controlled lower than described oil product temperature by the second thermostat, the temperature of cutting the water of described toroidal cavity lower than described oil product wax precipitation piont temperature and higher than the condensation point temperature of described oil product;
C) start stirrer, make the oil product in described storage tank be stirred fully and disperse, realize the wax deposit simulation under flox condition.
In a preferred embodiment, at described step c) after also comprise steps d), by measuring the thickness of the wax deposit of described cold finger outside wall surface, obtain different temperatures, wax deposition under different stirring condition.
In a preferred embodiment, in described steps d) in, by the thickness of the wax deposit of cold finger outside wall surface described in vernier caliper measurement.
Feature and the advantage of wax deposition experimental device of the present invention and experimental technique are: the present invention, when not using stirrer, can carry out static wax deposit experiment, add stirrer and can simulate the experiment of dynamic crude oil wax deposition; Stir oil product by the paddle of stirrer, make the outside wall surface of cold finger everywhere flow velocity, stressed, temperature is identical, be conducive to oil product medium high carbon number molecule simultaneously and separate out.Use this stirrer, not only can simulate the dynamic wax deposit experiment of pure oil, the wax deposit experiment of simulating oil-water mixed liquor can also be realized, and by regulating the rotating speed of stirrer to change oil-water mixture blending degree.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of wax deposition experimental device of the present invention.
Fig. 2 is the structural representation of the cold finger of wax deposition experimental device of the present invention.
Fig. 3 is the structural representation of the stirrer of wax deposition experimental device of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the invention provides a kind of wax deposition experimental device, it comprises storage tank 1, cold finger 2 and stirrer 3, wherein: storage tank 1 has shoe cream room 11, be arranged with water jacket samdwich 12 outside described storage tank 1, described water jacket samdwich 12 is connected with one first thermostat 4; Cold finger 2 is arranged in described shoe cream room 11, the urceolus 22 that described cold finger 2 has inner core 21 and is set in outside described inner core 21, and be formed with toroidal cavity 23 between described inner core 21 and described urceolus 22, described toroidal cavity 23 is connected with one second thermostat 5; Stirrer 3 has the rotating shaft 31 be located in described inner core 21, and one end that described rotating shaft 31 passes described inner core 21 is connected with multiple paddle 32, and described paddle 32 is between the periphery wall and the internal perisporium of described storage tank 1 of described cold finger 2.
Specifically, storage tank 1 is substantially in tubular, and it has shoe cream room 11, and shoe cream room 11 can hold the oil product needed for experiment, and in the present embodiment, the height of storage tank 1 is 220mm; Water jacket samdwich 12 is set in the outside of storage tank 1, this water jacket samdwich 12 connects the first thermostat 4 by pipeline 41, in the present embodiment, this first thermostat 4 is the first temperature controlled water bath instrument, the diameter of this pipeline 41 is 160mm, the wall thickness of pipeline 41 is 2.5mm, and it is for controlling the temperature of the water in water jacket samdwich 12 in predetermined experimental temperature, thus the oil product temperature in maintenance storage tank 1 is in this predetermined experimental temperature.
Further, be also provided with temperature sensor (not shown) in storage tank 1, this temperature sensor can test the oil product temperature of each position radial in storage tank 1, and its precision is 0.1 DEG C.In the present invention, the outside of the water jacket samdwich 12 outside storage tank 1 is also arranged with heat-insulation layer, simultaneously, pipeline 41 is also arranged with this heat-insulation layer, to ensure that the temperature of the oil product temperature in storage tank 1 and the water in pipeline 41 is not fled in whole experimentation in environment, reduce thermal loss to the impact of experimental result, ensure effectively carrying out of experiment.
As shown in Figure 2, cold finger 2 is made up of inner core 21 and urceolus 22, and urceolus 22 is set in the outside of inner core 21, is formed with toroidal cavity 23 between inner core 21 and urceolus 22.In the present embodiment, the height of cold finger 2 is 190mm, and the diameter of the urceolus 22 of cold finger 2 is 41.5mm, and the wall thickness of urceolus 22 is 2.5mm, and the diameter of the inner core 21 of cold finger 2 is 14mm, and the wall thickness of inner core 21 is 2mm.In the present invention, the toroidal cavity 23 of cold finger 2 has flow inlet 231 and water export 232, second thermostat 5 is connected with water export 232 with the flow inlet 231 of toroidal cavity 23 respectively by pipeline 51, in the present invention, second thermostat 5 is the second temperature controlled water bath instrument, the temperature of the water in toroidal cavity 23 is controlled by the second thermostat 5, make the temperature of the water in this toroidal cavity 23 lower than the experimental temperature of the oil product wax precipitation piont temperature in storage tank 1 and oil product, and higher than the condensation point temperature of oil product.
As shown in Figure 3, stirrer 3 is made up of rotating shaft 31 and the multiple paddles 32 be connected in rotating shaft 31, in the present embodiment, the upper end of rotating shaft 31 is connected with a motor 6, its lower end penetrates in the shoe cream room 11 of storage tank 1 in the inner core 21 of cold finger 2, be connected with multiple paddle 32 by many connecting rods 33 after the lower end of rotating shaft 31 passes inner core 21, multiple paddle 32 is between the internal perisporium and the periphery wall of cold finger 2 of storage tank 1, it is for stirring the oil product in shoe cream room 11, by regulating the rotating speed of motor 6 frequency control rotating shaft 31, thus control the rotating speed of paddle 32.In the present invention, paddle 32 is arranged on connecting rod 33 movably, and also namely paddle 32 can be connected to the diverse location place of connecting rod 33 radial direction, and experimentally to study requirement, the stirrer 3 of selection different-diameter realizes the stirring to the oil product in storage tank 1; In addition, the present invention can arrange the paddle 32 of different length, control the distance from bottom of stirrer 3 apart from storage tank 1 and the rotating speed of rotating shaft 31 simultaneously, realize controlling oil product in storage tank 1 by shear rate, thus the dynamic crude oil wax deposition experiment under simulating different flox condition.In the present invention, the diameter of stirrer 3 can be 100mm and 70mm.
The experimentation of this wax deposition experimental device is as follows: utilize the first thermostat 4 to control in predetermined experimental temperature by the oil product temperature in storage tank 1; Utilize the second thermostat 5 temperature of the water in the toroidal cavity 23 of cold finger 2 to be controlled lower than the oil product temperature in storage tank 1, and the temperature of water in this toroidal cavity 23 lower than this oil product wax precipitation piont temperature and higher than the condensation point temperature of this oil product; Afterwards, by regulating the rotating speed of the rotating shaft 31 of the frequency control stirrer 3 of motor 6, making the oil product in storage tank 1 be stirred fully and disperse, realizing the wax deposit simulation under dynamic condition; Then, by measuring the thickness of the wax deposit of cold finger 2 outside wall surface, the wax deposition under different temperatures, different stirring condition is obtained.
When the wax precipitation piont temperature of the low oil product temperature in storage tank 1 of the temperature of the outside wall surface of cold finger 2 and this oil product, the outside wall surface of cold finger 2 has wax deposit to occur, and the diameter of this wax deposit of use vernier caliper measurement, can calculate the thickness of wax deposit; In the present embodiment, use the thickness of the wax deposit of the outside wall surface of the cold finger 2 of vernier caliper measurement, its precision is 0.02mm.
By this wax deposition experimental device, can test the fixing temperature difference, in different temperatures interval, oil product temperature and cold finger outside wall surface temperature are on the impact of wax deposition; Fixing oil product temperature or cold finger outside wall surface temperature one of them, test the impact of another temperature variation on wax deposition.In addition, by fixing oil product temperature and cold finger outside wall surface temperature, wax deposition when also can test the rotating speed of change stirrer 3 or change oil water mixing proportional under flox condition.
Wax deposition experimental device of the present invention, when not using stirrer 3, can carry out static wax deposit experiment, adds stirrer 3 and can simulate the experiment of dynamic crude oil wax deposition; Stir oil product by the paddle 32 of stirrer 3, make the outside wall surface of cold finger 2 everywhere flow velocity, stressed, temperature is identical, be conducive to simultaneously oil product medium high carbon number molecule separate out.Use this stirrer 3, not only can simulate the dynamic wax deposit experiment of pure oil, the wax deposit experiment of simulating oil-water mixed liquor can also be realized, and by regulating the rotating speed of stirrer 3 to change oil-water mixture blending degree.
In one particular embodiment of the present invention, test crude oil is heated to require temperature in storage tank 1, crude oil is dissolved completely, is made in storage tank 1 that oil temperature is identical simultaneously by stirrer 3 everywhere, then cold finger 2 and storage tank 1 are down to experiment oil temperature with phase same rate, abundant stirring, avoid the surface of cold finger 2 to have sediment to separate out, constant temperature 8 hours, by the second thermostat 5, the temperature of the water in the toroidal cavity 23 of cold finger 2 is down to experimental temperature, paddle 32 is adjusted to regulation rotating speed, tests.After experiment terminates, take out cold finger 2, with cold finger 2 diameter after vernier caliper measurement wax deposition, get sediment and carry out differential scanning calorimetry test (that is, DSC test) wax precipitation piont, calculate wax content.Carried out that the different temperature difference, different temperatures are interval respectively, the wax deposit experiment of different speed of agitator and different time, and analyze the Changing Pattern of its sediment physical property.
Specific experiment data are as follows:
1, the temperature difference is on the impact of cold finger experiment wax deposition
The temperature difference is larger, and Wax Sediment Velocity is faster, and wax deposit is also thicker.Table 1 leaves standstill wax deposit experiment under 9 DEG C, 12 DEG C and 17 DEG C of temperature difference, and table 2 is with the experiment of 50r/min rotating speed deposition 48h wax deposit under 5 DEG C, 10 DEG C and 13 DEG C of temperature difference.
12h sediment physical property is left standstill under table 19 DEG C, 12 DEG C and 17 DEG C of temperature difference
48h sediment physical property is deposited under table 25 DEG C, 10 DEG C and 13 DEG C of temperature difference
As can be seen from two showing above, in the outside wall surface temperature of identical cold finger 2, oil product temperature in storage tank 1 is higher, the wax deposit of the outside wall surface of cold finger 2 is thicker, its rate of sedimentation is also faster, the wax precipitation piont temperature of this wax deposit reduces along with the increase of the wax molecular conecentration gradient of the outside wall surface of cold finger 2 simultaneously, and the wax content of this wax deposit reduces along with the increase of the wax molecular conecentration gradient of the outside wall surface of cold finger 2.
2, temperature range is on the impact of cold finger experiment wax deposition
Sediment physical property after 24h is deposited under the table 310 DEG C temperature difference
As can be seen from the above table, in identical temperature difference different temperatures interval, selected temperature range does not almost affect wax deposit thickness and wax deposition rate, but 1 DEG C of wax amount separated out of lowering the temperature is different, the wax molecular conecentration gradient of the outside wall surface of cold finger 2 is also different, the wax precipitation piont temperature of wax deposit reduces with the increase of wax molecular conecentration gradient, and wax content reduces with the increase of wax molecular conecentration gradient.
3, speed of agitator is on the impact of cold finger experiment wax deposition
Table 4 stirrer diameter is sediment physical property after 100mm deposition 24h
The rotating speed of stirrer is faster, larger to the shear action of the outside wall surface of cold finger 2, accelerates again the oil product convection heat transfer in storage tank 1 simultaneously, thus creates impact to the speed of wax deposit.As can be seen from above-mentioned table, under identical oil temperature and cold finger temperature, use identical stirrer 3, under 50r/min and the 70r/min slow-speed of revolution, cold finger 2 outside wall surface Wax Sediment Velocity declines to some extent, but lower speed of agitator does not affect the wax precipitation piont temperature of wax deposit and wax content.
4, stirrer diameter is on the impact of cold finger experiment wax deposition
Stirrer diameter is larger, and under identical rotating speed, less to the shear action of the outside wall surface of cold finger 2, rate of sedimentation is larger.According to the diameter of cold finger 2 and the diameter of storage tank 1, use the wax deposit experiment of the stirrer 3 that diameter is 70mm and 100mm under same rotational speed respectively.
Table 5 and table 6 are sediment physical property after the stirrer of different-diameter deposits 24h respectively under 50r/min and 70r/min rotating speed.
Sediment physical property after table 5 deposits 24h under 50r/min rotating speed
Sediment physical property after table 6 deposits 24h under 70r/min rotating speed
As can be seen from the above table, the stirrer 3 of different-diameter, in the temperature of identical oil temperature and cold finger 2 outside wall surface, respectively under the slow-speed of revolution of 50r/min and 70r/min, does not affect the wax content of wax deposit and wax precipitation piont.
5, the simulation in temperature field
Because device axial length of the present invention is shorter, wax deposition experimental device of the present invention is reduced to three cover tube models.Water reverse flow vertically in the water of the toroidal cavity 23 in cold finger 2 and water jacket samdwich 12, from bottom surface, outer annulus enters in water jacket samdwich 12 from bottom to top with certain flow high temperature side water, low temperature side water enters in toroidal cavity 23 from the end face of cold finger 2 from top to bottom with certain flow, carries out forced-convection heat transfer with the outside wall surface of cold finger 2.Consider the impact of fluid gravity.
Table 7 circulator bath volumetric flow rate calibration result
Hot water side and cold water side volumetric flow rate are respectively 0.073L/s and 0.015L/s (about 4.7:1), and flow velocity is respectively 1.06cm/s and 1.23cm/s.
Along with the prolongation of sedimentation time, near cold finger 2, thermograde obviously reduces, and cold finger 2 outside wall surface temperature obviously raises, and main body medial temperature slightly raises, and starting stage change is more violent.The temperature difference is larger, thermograde and cold finger 2 outside wall surface temperature variation degree larger.Compared with 0h, after 18h, thermograde reduces 10.70% (5 DEG C) respectively, 21.25% (10 DEG C) and 27.15% (15 DEG C), cold finger 2 outside wall surface temperature increases 1.66% (5 DEG C) respectively, 4.57% (10 DEG C) and 9.42% (15 DEG C).
Along with the increase of water percentage, thermograde and cold finger 2 outside wall surface temperature variation degree larger.Compared with 0h, after 12h, thermograde reduces 32.34% (0%) respectively, 17.65% (10%), 19.79% (20%) and 14.66% (30%), cold finger wall surface temperature increases 6.54% (0%) respectively, 4.34% (10%), 4.30% (20%) and 3.74% (30%).
Embodiment two
As shown in Figures 1 to 3, the present invention also provides a kind of experimental technique adopting wax deposition experimental device described in embodiment one, structure, the principle of work of the wax deposition experimental device in this embodiment and the wax deposition experimental device of embodiment one are identical with beneficial effect, do not repeat them here.Described experimental technique comprises the steps:
A) by the first thermostat 4, the oil product temperature in storage tank 1 is controlled in an experimental temperature;
B) temperature of the water of the toroidal cavity 23 between the inner core 21 of cold finger 2 and urceolus 22 controlled lower than described oil product temperature by the second thermostat 5, the temperature of the water of described toroidal cavity 23 lower than described oil product wax precipitation piont temperature and higher than the condensation point temperature of described oil product;
C) start stirrer 3, make the oil product in described storage tank 1 be stirred fully and disperse, realize the wax deposit simulation under dynamic condition.
Specifically, in step c) after also comprise steps d), by measuring the thickness of the wax deposit of described cold finger 2 outside wall surface, obtain different temperatures, wax deposition under different stirring condition.Further, in steps d) in, by the thickness of the wax deposit of the outside wall surface of cold finger described in vernier caliper measurement 2.
Experimental technique of the present invention, when not using stirrer 3, can carry out static wax deposit experiment, adds stirrer 3 and can simulate the experiment of dynamic crude oil wax deposition; Stir oil product by the paddle 32 of stirrer 3, make the outside wall surface of cold finger 2 everywhere flow velocity, stressed, temperature is identical, be conducive to simultaneously oil product medium high carbon number molecule separate out.Use this stirrer 3, not only can simulate the dynamic wax deposit experiment of pure oil, the wax deposit experiment of simulating oil-water mixed liquor can also be realized, and by regulating the rotating speed of stirrer 3 to change oil-water mixture blending degree.
The foregoing is only several embodiments of the present invention, those skilled in the art can carry out various change or modification to the embodiment of the present invention according to content disclosed in application documents and not depart from the spirit and scope of the present invention.
Claims (8)
1. a wax deposition experimental device, is characterized in that, described wax deposition experimental device comprises:
Storage tank, it has shoe cream room, is arranged with water jacket samdwich outside described storage tank, and described water jacket samdwich is connected with the first thermostat;
Cold finger, it is arranged in described shoe cream room, and described cold finger has inner core and is set in the urceolus outside described inner core, and be formed with toroidal cavity between described inner core and described urceolus, described toroidal cavity is connected with the second thermostat;
Stirrer, it has the rotating shaft be located in described inner core, and one end that described rotating shaft passes described inner core is connected with multiple paddle, and described paddle is between the periphery wall and the internal perisporium of described storage tank of described cold finger.
2. wax deposition experimental device as claimed in claim 1, it is characterized in that, be connected with connecting rod between described paddle and described rotating shaft, described paddle is arranged on described connecting rod movably.
3. wax deposition experimental device as claimed in claim 1, is characterized in that, be arranged with heat-insulation layer outside described water jacket samdwich.
4. wax deposition experimental device as claimed in claim 1, is characterized in that, be provided with temperature sensor in described storage tank.
5. wax deposition experimental device as claimed in claim 1, it is characterized in that, the rotating shaft of described stirrer is connected with a motor.
6. adopt an experimental technique for the wax deposition experimental device according to any one of Claims 1 to 5, it is characterized in that, described experimental technique comprises the steps:
A) by the first thermostat, the oil product temperature in storage tank is controlled in an experimental temperature;
B) temperature of the water of the toroidal cavity between the inner core of cold finger and urceolus controlled lower than described oil product temperature by the second thermostat, and the temperature of the water of described toroidal cavity lower than described oil product wax precipitation piont temperature and higher than the condensation point temperature of described oil product;
C) start stirrer, make the oil product in described storage tank be stirred fully and disperse, realize the wax deposit simulation under flox condition.
7. experimental technique as claimed in claim 6, is characterized in that, at described step c) after also comprise steps d), by measuring the thickness of the wax deposit of described cold finger outside wall surface, the wax deposition under acquisition different temperatures, different stirring condition.
8. experimental technique as claimed in claim 7, is characterized in that, in described steps d) in, by the thickness of the wax deposit of cold finger outside wall surface described in vernier caliper measurement.
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| CN106705915A (en) * | 2017-01-04 | 2017-05-24 | 中国石油大学(华东) | Wetting test device for organic liquid tank wall |
| CN108982307A (en) * | 2018-09-03 | 2018-12-11 | 燕山大学 | A kind of real-time online measuring device and measurement method measuring waxy crude oil wax deposition amount |
| CN109342493A (en) * | 2018-12-14 | 2019-02-15 | 东营联合石化有限责任公司 | A kind of measuring method of diesel oil wax precipitation point |
| CN109486511A (en) * | 2018-12-26 | 2019-03-19 | 中国石油大学(北京) | It reduces, the method and device of test crude oil yield stress |
| CN110108511A (en) * | 2019-04-28 | 2019-08-09 | 辽宁石油化工大学 | A kind of multi-faceted accurate thickness measuring and sampler and method suitable for cold finger surface wax deposit |
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| US11125735B2 (en) * | 2017-03-30 | 2021-09-21 | Championx Usa Inc. | Dynamic wax deposition testing systems and methods |
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| CN110108513A (en) * | 2019-04-28 | 2019-08-09 | 辽宁石油化工大学 | A kind of accurate thickness measuring of cold finger surface wax deposit and sampler and method |
| CN110108511B (en) * | 2019-04-28 | 2021-09-24 | 辽宁石油化工大学 | Multi-direction accurate thickness measuring and sampling device and method suitable for wax deposits on cold finger surface |
| CN110108513B (en) * | 2019-04-28 | 2021-09-24 | 辽宁石油化工大学 | Cold finger surface wax deposit accurate thickness measuring and sampling device and method |
| CN112816517A (en) * | 2019-11-18 | 2021-05-18 | 中国石油天然气股份有限公司 | Wax precipitation experiment system and wax precipitation cylinder |
| CN112816517B (en) * | 2019-11-18 | 2022-12-02 | 中国石油天然气股份有限公司 | Wax precipitation experiment system and wax precipitation cylinder |
| CN110927199A (en) * | 2019-12-20 | 2020-03-27 | 西安石油大学 | Indoor experimental device for high-temperature scaling of crude oil heat exchanger |
| CN110927199B (en) * | 2019-12-20 | 2022-10-18 | 西安石油大学 | Indoor experimental device for high-temperature scaling of crude oil heat exchanger |
| CN114509467A (en) * | 2020-11-16 | 2022-05-17 | 中国石油天然气股份有限公司 | Wax deposition simulation device and method |
| CN112945814A (en) * | 2021-04-16 | 2021-06-11 | 武汉理工大学 | Experimental device and using method thereof |
| CN112945814B (en) * | 2021-04-16 | 2024-06-07 | 武汉理工大学 | Experimental device and application method thereof |
| CN115639308A (en) * | 2021-12-28 | 2023-01-24 | 东北石油大学 | Wax removal experimental method based on in-situ utilization of asphaltenes |
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