CN204330095U - Supercritical CO 2flowmeter prover - Google Patents
Supercritical CO 2flowmeter prover Download PDFInfo
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- CN204330095U CN204330095U CN201420846427.9U CN201420846427U CN204330095U CN 204330095 U CN204330095 U CN 204330095U CN 201420846427 U CN201420846427 U CN 201420846427U CN 204330095 U CN204330095 U CN 204330095U
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- valve
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Abstract
The utility model relates to supercritical CO
2flowmeter prover, for supercritical CO
2flow meter calibration.Test tank is arranged on above weighing device, connects storage tank, liquid pump, test tank, valve one successively with pipeline, feeds liquid pump, supercharge pump, heat interchanger, buffer tank, valve three, clamper, throttle nozzle, variable valve two and waste gas evacuating device; Valve two one end connects storage tank, and the other end is connected to valve one and feeds between liquid pump.The arrangement achieves CO under supercritical environment
2flow calibration.
Description
Technical field
The present invention relates to flow meter calibration technical field, particularly relate to supercritical CO
2flowmeter prover.
Background technology
Current, by injecting CO to stratum
2carrying out the displacement of reservoir oil and be more and more subject to industry attention, is the needs of oil-field development on the one hand, is the needs of reduction of greenhouse gas discharge on the other hand.CO
2technology of reservoir sweep has developed a lot of year, and current air insufflation techiques is main or Quan Jinghe notes.Because stratum gettering ability there are differences, better oil displacement efficiency can be obtained by the mode of layered gas-injection.In order to the gas injection rate of metering layered, need to use subsurface flowmeter, but, the subsurface flowmeter all inapplicable metering CO used at present
2flow, therefore need development be specifically designed to measure CO
2flowmeter.According to CO
2phase diagram, when temperature is more than 30.95 DEG C, when pressure is more than 7.39MPa, CO
2namely supercriticality is in, the CO under subsurface flowmeter working environment
2it is generally the environment being in this supercriticality.CO is measured in development
2flowmeter must need caliberating device, the demarcation condition of caliberating device also demand fulfillment supercritical environment, but current caliberating device all can not meet such requirement.
Chinese patent, application number 201410131086.1, applying date 2014.04.03, patent name " gas flow orifice plate caliberating device ", disclose a kind of device for demarcating orifice flowmeter, this device pipeline is connected to working gas container, buffer tank, orifice plate box, adjustment container and rewinding container and vacuum pump successively.This Patent equipment is applied to demarcate to surpass and faces CO
2there are three problems in flowmeter, one is do not have thermoregulation mechanism, does not reach supercritical CO
2temperature conditions; Two is long-time stable to test at a pressure, and this device uses buffer tank to provide gas, uses rewinding container and adjustment container to carry out gas recovery, and the pressure one in the container at orifice plate two ends falls one liter and can not keep stable; Three, CO
2generally storage in liquid, as do not established supercharge pump to be to obtain required nominal pressure after gas source vessel.
Chinese patent, application number 201310135827.9, applying date 2013.04.19, patent name " a kind of flow verification system and calibration method thereof ", disclose one and utilize electronic scale Weighing method metered flow, have the caliberating device of temperature and pressure control system, this application of installation faces CO in demarcation is super
2also there is following problem in flowmeter: one, and this is a closed loop cycle device, and it is out of question for using water as and demarcating medium, but CO
2liquid in storage tank, and the CO after having demarcated
2gas, can not recycling; Two, the voltage-stabilizing system of this device is provided with the gas space on the top of water receptacle, regulated the pressure in water receptacle by air pump, and CO
2itself be also gas, two kinds of gases meet and will mix, and are not therefore also suitable for CO
2the voltage stabilizing of caliberating device; Three, the constant-voltage equipment of this device just creates stable flow, has just substantially become normal pressure after water flows out from water receptacle in the position of flowmeter, and CO
2flowmeter place needs supercritical pressure, and therefore this device can not realize.
Above two disclosed patent institute accepted standard metering methods are all collect fluid after by proving flowmeter and weigh, because supercritical CO
2be difficult to reclaim, therefore above-mentioned weighting manner is not suitable for CO yet
2flow calibrating device.
Summary of the invention
For solving the problems of the technologies described above, invent supercritical CO
2flowmeter prover, which solves CO
2flow metering, voltage stabilizing, overcritical demarcation environmental problem, meet supercritical CO
2flow meter calibration demand.
The utility model have employed following technical scheme:
Supercritical CO
2flowmeter prover, test tank is arranged on above weighing device, connects storage tank, liquid pump, test tank, valve one successively with pipeline, feeds liquid pump, supercharge pump, heat interchanger, buffer tank, valve three, clamper, throttle nozzle, variable valve two and waste gas evacuating device; Valve two one end connects storage tank, and the other end is connected to valve one and feeds between liquid pump, and pressure thermometer three is arranged on the pipeline between buffer tank and valve three.
Preferably, variable valve one two ends are connected to the two ends of supercharge pump.
Preferably, described throttle nozzle is that multistage valve is installed in series.
Compared with prior art, the beneficial effects of the utility model are, on the one hand, due to the CO that this calibration experiment uses
2amount is many, is difficult to arrange returnable bottle to realize the weighing of gas at caliberating device endpiece, solves the measurement problem of mass rate, and ensure that measuring accuracy by arranging a little test tank and weighing device; On the other hand, throttle nozzle is set after by proving flowmeter and variable valve achieves by the hyperbaric environment at proving flowmeter place and required different calibration experiment pressure; Three are, before and after heat interchanger, and CO
2becoming supercriticality from liquid state, by arranging a buffer tank after heat interchanger, having stabilized the pressure surge problem that causes of flow rate fluctuation of discharging because of supercharge pump.
Accompanying drawing explanation
Simply describing the present invention above, next describing the present invention further, in detail with reference to describing the drawing of following specific embodiment of the present invention.These drawings only describe some typical embodiments of this invention, therefore can not think to limit the scope of the invention.In these drawings:
Fig. 1 is supercritical CO
2the schematic flow sheet of flowmeter prover.
Fig. 2 is the structural representation of heat interchanger.
Fig. 3 is the structural representation of throttle nozzle.
Embodiment
For layering note CO
2the duty of the flowmeter of gas well underground survey is high temperature and high pressure environment, and its temperature is generally between 50 ~ 150 DEG C, and pressure is generally at more than 10MPa, and this interval is CO
2supercriticality.The CO that business is bought
2be liquid canned, temperature is about-20 DEG C ~-30 DEG C, the general about 2MPa of pressure in tank.According to this condition, for the CO of liquid state
2become supercriticality, experimental provision needs liquid towards CO
2increasing temperature and pressure.
See Fig. 1 supercritical CO
2flowmeter prover schematic flow sheet, test tank 3 is arranged on above weighing device 4, connects storage tank 1, liquid pump 2, test tank 3, valve 1 successively with pipeline 13, feeds liquid pump 8, supercharge pump 10, heat interchanger 14, buffer tank 15, valve 3 17, clamper 18, throttle nozzle 20, variable valve 2 41 and waste gas evacuating device 42; Valve 26 one end connects storage tank 1, and the other end is connected to valve 1 and feeds between liquid pump 8; Pressure thermometer 3 16 is arranged on the pipeline between buffer tank 15 and valve 3 17.
Employ multiple stage pump, pressure thermometer, valve, variable valve etc. in device, employ identical legend in the diagram, but due to its function or effect difference, its title is distinguished.
In general, under the condition of identical measuring accuracy, the instrument that range is larger, its absolute error value measured is larger, in order to improve the measuring accuracy of apparatus of the present invention, reduces the calibration experiment time, a little test tank 3 is provided with again after storage tank 1, weighing device 4 is arranged on below test tank 3, and mass rate measured in short Measuring Time is like this just less with the ratio of its error, thus ensure that the stated accuracy of device.
The effect arranging valve 26 is the CO used before calibration experiment starts to enroll data in storage tank 1
2carry out the flow of system, temperature and pressure regulates, make it to reach calibrating parameters requirement, this may need a longer process, and the volume of test tank 3 is less, can not meet the requirement of this adjustment process to capacity.
In order to reach more accurate calibration request, the pipeline everywhere 13 of device flow process is provided with multiple pressure thermometer, as pressure thermometer 1, pressure thermometer 2 12, pressure thermometer can also increase design on pipeline, its effect is the measurements and calculations by temperature and pressure, obtain along the volume of the fluid in journey pipeline or the change of quality, for correcting measured results.
Supercharge pump 10 is a kind of variable flow pumps, but its adjustment always has a scope, when flow does not reach calibration request, and a variable valve 1 in parallel in the side of supercharge pump 10.Variable valve 1 two ends are connected to the two ends of supercharge pump 10.Required calibrational capacity is reached by adjustment variable valve 1.
For ease of obtaining the reference value of flow in time, the pipeline after supercharge pump 10 can also install a flowmeter 11.
Because source of the gas CO
2be liquid, easy pumping and supercharging, therefore, be provided with heat interchanger 14, as shown in Figure 2 on stream after supercharge pump 10.Filling conduction oil 22 in the shell 21 of heat interchanger 14, in shell 21, electric heating tube 24 is established in bottom, and heat exchanger tube 23 is positioned at above electric heating tube 24.Certain electric heating tube 24 and heat exchanger tube 23 can also be disposed in two containers, and the middle pipeline that uses connects.Control its temperature by set temperature sensor 25 in conduction oil by power supply 26, sensor 25, to connect with cable 27 between power supply 26 and electric heating tube 24.
Buffer tank 15 is set after heat interchanger, its objective is the pressure surge problem reduced because the flow rate fluctuation of supercharge pump discharge causes.Buffer tank 15 is arranged on herein, is the compressibility taking full advantage of supercritical gas.Have a liquid-gas interface in general buffer tank, top part is filled with nitrogen usually, and does not have liquid-gas interface in the buffer tank 15 of this device.
Be arranged in clamper 18 by proving flowmeter 19, clamper is herein a popular call, and the mounting means of flowmeter can be clamping, also can be thread connection.
In order to calibration experiment is safe and easy to operate, valve 1, valve 26 and valve 3 17 can be automatic switch valves, use pneumatic switch ball valve more easy to operate.Similarly, variable valve 1 and variable valve 2 41 also can be automatic regulating valves.
Throttle nozzle 20 is that multistage valve is installed in series, and as shown in Figure 3, valve 33 is arranged on mouth seat 32 and also compresses with pressure cap 34, and multistage mouth seat 32 is cascaded, and front end connects blind plugging 30, and rear end connects mouth 35, and form valve string, valve string is arranged in sleeve pipe 31.Every grade of mouth seat 32 can install multiple valve 33.In actual calibration experiment, according to required pressure drop and flow, every grade of valve size, quantity and progression needed for calculating.
Supercritical CO of the present invention
2the scaling method of flowmeter prover, the steps include:
A, valve-off 1, valve 26, valve 3 17, variable valve 1 closes minimum state, and variable valve 2 41 reaches maximum rating; Be arranged in clamper 18 by proving flowmeter 19;
The quantity of b, adjustment valve 33 and size;
C, operation heat interchanger 14 make it reach required and demarcate temperature;
D, operation liquid pump 2, injects liquid CO from storage tank 1 in test tank 3
2;
E, open valve 26, run and feed liquid pump 8 and supercharge pump 10, the flow of adjustment supercharge pump 10 makes it to reach design calibration value; Valve 3 17 is opened when the display pressure of pressure thermometer 3 16 reaches design calibration value;
F, adjustment variable valve 2 41 make the display pressure of pressure thermometer 3 16 reach design calibration value;
G, valve-off 26, open valve 1, when pressure stability, is W by the quality of weighing device 4 recording gauge measuring tank 3
1, after elapsed time t, the quality of recording gauge measuring tank 3 is W
2;
H, pass through following formula:
Q＝（W
1-W
2）/t
The mass rate of calculation element.
Embodiment as herein described is only exemplary embodiments, but is not limited only to these embodiments, and those skilled in the art can not depart from spirit of the present invention and make amendment under enlightening.A lot of change, combination and amendment may be there is in scheme disclosed herein; and all within the scope of the invention, therefore, protection domain is not limited only to explanation above; but define according to claim, protection domain comprises all equivalents of the target of claim.
Claims (8)
1. supercritical CO
2flowmeter prover, test tank (3) is arranged on above weighing device (4), it is characterized in that, connect storage tank (1), liquid pump (2), test tank (3), valve one (5) successively with pipeline (13), feed liquid pump (8), supercharge pump (10), heat interchanger (14), buffer tank (15), valve three (17), clamper (18), throttle nozzle (20), variable valve two (41) and waste gas evacuating device (42); Valve two (6) one end connects storage tank (1), and the other end is connected to valve one (5) and feeds between liquid pump (8); Pressure thermometer three (16) is arranged on the pipeline between buffer tank (15) and valve three (17).
2. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, variable valve one (9) two ends are connected to the two ends of supercharge pump (10).
3. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, described throttle nozzle (20) is that multistage valve (33) is installed in series.
4. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, described valve one (5), valve two (6) and valve three (17) are automatic switch valves.
5. supercritical CO according to claim 4
2flowmeter prover, is characterized in that, described automatic switch valve is pneumatic switch ball valve.
6. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, described variable valve one (9) and variable valve two (41) are automatic regulating valves.
7. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, described supercharge pump (10) is variable flow pump.
8. supercritical CO according to claim 1
2flowmeter prover, is characterized in that, filling conduction oil (22) in the shell (21) of described heat interchanger (14), in shell (21), electric heating tube (24) is established in bottom, and heat exchanger tube (23) is positioned at above electric heating tube (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420846427.9U CN204330095U (en) | 2014-12-26 | 2014-12-26 | Supercritical CO 2flowmeter prover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420846427.9U CN204330095U (en) | 2014-12-26 | 2014-12-26 | Supercritical CO 2flowmeter prover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204330095U true CN204330095U (en) | 2015-05-13 |
Family
ID=53166445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420846427.9U Withdrawn - After Issue CN204330095U (en) | 2014-12-26 | 2014-12-26 | Supercritical CO 2flowmeter prover |
Country Status (1)
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| CN (1) | CN204330095U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568082A (en) * | 2014-12-26 | 2015-04-29 | 中国石油化工股份有限公司 | Supercritical CO2 flowmeter calibration device and calibration method thereof |
| CN107144325A (en) * | 2017-06-06 | 2017-09-08 | 重庆川仪自动化股份有限公司 | Mass flowmeter calibration detection means |
| CN107817315A (en) * | 2017-10-24 | 2018-03-20 | 上海理工大学 | Measurement supercritical carbon dioxide throttles the experimental provision of expansion process in confined chamber |
| CN108196598A (en) * | 2018-03-05 | 2018-06-22 | 昆山鼎工业科技有限公司 | A kind of on-line automatic medicine system of continuous metal surface disposing line and its adding method thereof |
-
2014
- 2014-12-26 CN CN201420846427.9U patent/CN204330095U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104568082A (en) * | 2014-12-26 | 2015-04-29 | 中国石油化工股份有限公司 | Supercritical CO2 flowmeter calibration device and calibration method thereof |
| CN104568082B (en) * | 2014-12-26 | 2017-10-17 | 中国石油化工股份有限公司 | Supercritical CO2Flowmeter prover and its scaling method |
| CN107144325A (en) * | 2017-06-06 | 2017-09-08 | 重庆川仪自动化股份有限公司 | Mass flowmeter calibration detection means |
| CN107144325B (en) * | 2017-06-06 | 2023-09-01 | 重庆川仪自动化股份有限公司 | Calibration and detection device for mass flowmeter |
| CN107817315A (en) * | 2017-10-24 | 2018-03-20 | 上海理工大学 | Measurement supercritical carbon dioxide throttles the experimental provision of expansion process in confined chamber |
| CN108196598A (en) * | 2018-03-05 | 2018-06-22 | 昆山鼎工业科技有限公司 | A kind of on-line automatic medicine system of continuous metal surface disposing line and its adding method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150513 Effective date of abandoning: 20171017 |
|
| AV01 | Patent right actively abandoned |