Multi-medium flow integrated control device capable of automatically identifying carbon dioxide and water

Abstract

The invention discloses a multi-medium flow integrated control device capable of automatically identifying carbon dioxide and water, and belongs to the technical field of carbon dioxide capture and utilization and geological storage. According to the technical scheme, the system comprises a medium identification and monitoring unit used for identifying and monitoring a medium; the flow control unit is used for controlling the medium flow; and a medium circulation channel between the medium identification and monitoring unit and the flow control unit. The method has the beneficial effects that the medium identification sensor is arranged, carbon dioxide and water are distinguished by testing different conductivity signals of different media between two electrodes according to the principle that the conductivity of different media of carbon dioxide and water is different, and the method is simple, rapid and high in accuracy. And the injection amount of carbon dioxide and water can be quickly identified and calculated by matching with a flow sensor.

Description

TECHNICAL FIELD

[0001] The application relates to a multi-medium flow integrated control device for automatically identifying carbon dioxide and water, and belongs to the technical field of carbon dioxide capture and utilization and geological storage. BACKGROUND

[0002] To achieve the goal of carbon peak and carbon neutralization, CCUS technology is a key technology for energy saving and emission reduction in the fossil energy field. Among them, using CO2 to improve oil recovery is the most important technology for CO2 storage while obtaining economic benefits. In the process of CO2 flooding, water alternating gas technology (WAG) is a key technology for injection. All CO2 injection wells (CO2) need to use this technology. Through water alternating gas injection, CO2 (CO2) and water are injected alternately, and the injection water is both a flooding medium and a profile control agent, which can effectively improve the swept volume of the driving medium and realize uniform response of the oil reservoir.

[0003] The supporting process of the water alternating gas injection key technology (WAG) has experienced wellhead process, valve group supporting, and water and gas supporting injection process. At present, the injection metering instrument has been localized, and the metering interval has developed to a pry and a double process. The wellhead process has developed from double-pipe wellhead injection to single-pipe injection. The metering control has realized automatic control. The water alternating gas injection supporting technology has developed to a mature stage and can meet the needs of current industrialization promotion.

[0004] Although the double system (water manifold and carbon dioxide manifold) + double metering (water and carbon dioxide metering) + double valve control to realize water alternating gas (WAG) injection is the current mature method, there are practical problems such as large occupied area of the entire ground construction, complex process, and high investment, which limit the space for technical development. SUMMARY

[0005] The purpose of the application is to solve the problems in the prior art and provide an online monitoring instrument for measuring and controlling two media of carbon dioxide and water. A single-chip microcomputer control system can quickly identify and calculate carbon dioxide and water and automatically control and adjust the flow.

[0006] The technical scheme of the application is: an automatic multi-medium flow integrated control device for identifying carbon dioxide and water, comprising:

[0007] A medium identification and monitoring unit for identifying and monitoring the medium;

[0008] A flow control unit for controlling the medium flow;

[0009] And a medium flow channel between the medium identification and monitoring unit and the flow control unit.

[0010] The medium flow channel comprises a first channel in the base a on the side of the medium identification and monitoring unit, and a second channel in the base b on the side of the flow control unit, the first channel communicates with the second channel, and the base a and the base b are fixed by bolt connection.

[0011] The medium identification and monitoring unit comprises a medium identification sensor and a flow sensor with detection ends in the first channel, and the medium identification sensor and the flow sensor are electrically connected with the totalizer.

[0012] The medium identification and monitoring unit further comprises a temperature sensor and a pressure sensor with detection ends in the first channel, and the temperature sensor and the pressure sensor are electrically connected with the totalizer.

[0013] The totalizer is located on the shell a fixed with the base a, and the top of the medium identification sensor, the flow sensor, the temperature sensor and the pressure sensor are located in the shell a.

[0014] The flow control unit comprises an electric control valve, the electric control valve comprises a driving mechanism fixed on the shell b, the driving mechanism is connected with a driving valve core, the valve core is inverted T-shaped in cross section, the bottom of the inverted T-shaped valve core is located below an inner bushing, the valve core is slidingly connected and fixed in the inner bushing in the shell b, and a slow flow mechanism is arranged in the cavity at the bottom of the valve core.

[0015] The medium identification sensor comprises a sensor probe, a sensor core assembly, an epoxy resin seal and a sensor cover, one end of the sensor probe is located in the first channel, and the other end is embedded in the inner side of the sensor cover, the sensor core assembly is located in the inner side of the sensor probe and is wrapped by the epoxy resin seal.

[0016] The slow flow mechanism comprises an embedded block b sealingly fixed in the cavity, and an embedded block a fixed on the embedded block b by a fastening bolt, the embedded block a is provided with a flow guide inclined hole a, the embedded block b is provided with a flow guide inclined hole b, the flow guide inclined hole a and the flow guide inclined hole b communicate and form a flow guide channel with a V-shaped cross section, the cavity is provided with inclined flow holes a and b on both sides and inclined upward along the medium flow direction, and the low end of the inclined flow hole a is higher than the low end of the inclined flow hole b.

[0017] The cavity bottom is provided with a drainage mechanism, the drainage mechanism comprises a drainage hole, the water inlet end of the drainage hole is provided with a movable sealing block, the sealing block movably seals the drainage hole through a sealing ring b, a limiting bolt penetrates the shell b and is connected with the sealing block, a spring is sleeved on the outer periphery of the limiting bolt, and the two ends of the spring are respectively connected with the limiting bolt and the outer wall of the shell b.

[0018] The inner bushing is sealingly arranged on the inner wall of the shell b through a sealing ring a; and the axes of the inclined flow hole a and the inclined flow hole b are parallel.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. By setting up a medium identification sensor, relying on the principle that carbon dioxide and water have different electrical conductivities, carbon dioxide and water can be distinguished by testing the difference in electrical conductivity signals between two electrodes. This method is simple and fast, and when combined with a flow sensor, it can quickly identify and calculate the injection volume of carbon dioxide and water.

[0021] 2. By setting up an intelligent totalizer, utilizing its internal microcontroller system, along with a data processing module and a data storage module, after the intelligent totalizer's media identification sensor identifies the type of media, it automatically outputs and calculates and stores the data for different media, thereby realizing the automatic accumulation of carbon dioxide and water meter readings.

[0022] 3. The intelligent totalizer and the electric control valve alternately control and regulate. A single-chip microcomputer control system can automatically dispense carbon dioxide and water and automatically control and regulate the flow. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an online monitoring instrument for measuring and controlling two media, carbon dioxide and water, according to the present invention.

[0024] Figure 2 This is a schematic diagram of the structure of the dielectric sensor in this invention;

[0025] Figure 3 for Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 4 This is a schematic diagram of the flow-retarding component in this invention.

[0027] The reference numerals in the diagram are as follows: 1. Base a; 2. First channel; 3. Temperature sensor; 4. Electrically controlled valve; 5. Integrator; 6. Pressure sensor; 7. Drive mechanism; 8. Valve core; 9. Flow-diverting orifice a; 10. Inner bushing; 11. Flow-slowing mechanism; 12. Second channel; 13. Flow-diverting orifice b; 14. Cavity; 15. Base b; 16. Medium identification sensor; 17. Flow sensor; 18. Sensor cover; 19. Sensor core assembly; 20. Sensor probe; 21. Epoxy resin sealant; 22. Housing b; 23. Sealing ring b; 24. Sealing block; 25. Drain hole; 26. Spring; 27. Limit bolt; 28. Insert block a; 29. ​​Flow-guiding oblique hole a; 30. Flow-guiding oblique hole b; 31. Insert block b; 32. Sealing ring a; 33. Fastening bolt. Detailed Implementation

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0032] The following is in conjunction with the appendix Figures 1-4 The present invention will be described in further detail as follows:

[0033] Example 1

[0034] A multi-media flow integrated control device for automatically identifying carbon dioxide and water includes:

[0035] The medium identification and monitoring unit is used to identify and monitor the passing water and carbon dioxide; the medium identification and monitoring unit includes a medium identification sensor 16 and a flow sensor 17 with the detection end located in the first channel 2, and the medium identification sensor 16 and the flow sensor 17 are electrically connected to the integrator 5.

[0036] A flow control unit is used to control the flow rate of water and carbon dioxide. The flow control unit includes an electrically controlled valve 4, which includes a drive mechanism 7 fixed on the housing b22. The drive mechanism 7 is connected to a drive valve core 8. The valve core 8 has an inverted T-shaped cross section, with the bottom of the inverted T-shape located below the inner bushing 10. The valve core 8 is slidably connected to the inner bushing 10 fixed in the housing b22. The drive mechanism 7 can be a pneumatic piston or a motor and gears to drive the valve core 8 to move up and down.

[0037] A media flow channel is provided between the media identification and monitoring unit and the flow control unit. The media flow channel includes a first channel 2 located in base a1 on the media identification and monitoring unit side, and a second channel 12 located in base b15 on the flow control unit side. The first channel 2 and the second channel 12 are connected, and base a1 and base b15 are fixed together by bolts. The media identification and monitoring unit also includes a temperature sensor 3 and a pressure sensor 6, with their detection ends located within the first channel 2. Both the temperature sensor 3 and the pressure sensor 6 are electrically connected to the integrator 5.

[0038] The totalizer 5 is located on the housing a, which is fixed to the base a1. The tops of the medium identification sensor 16, flow sensor 17, temperature sensor 3 and pressure sensor 6 are all located inside the housing a.

[0039] The medium identification sensor 16 includes a sensor probe 20, a sensor core assembly 19, an epoxy resin sealant 21, and a sensor cover 18. One end of the sensor probe 20 is located in the first channel 2, and the other end is embedded in the inside of the sensor cover 18. The sensor core assembly 19 is located inside the sensor probe 20 and is wrapped by the epoxy resin sealant 21.

[0040] A flow-slowing mechanism 11 is provided in the cavity 14 at the bottom of the valve core 8. The flow-slowing mechanism 11 includes an insert block b31 that is sealed and fixed in the cavity 14, and an insert block a28 that is fixed on the insert block b31 by fastening bolts 33. The insert block a28 has a flow-guiding oblique hole a29, and the insert block b31 has a flow-guiding oblique hole b30. The flow-guiding oblique hole a29 and the flow-guiding oblique hole b30 are connected to form a flow-guiding channel with a V-shaped cross section, so that the medium can be further slowed down when it flows, making the intelligent totalizer 5 more sensitive when measuring dioxide and water, thereby ensuring the accuracy of the measurement results. The cavity 14 has oblique flow holes a9 and b13 that are inclined upward along the flow direction of the medium. The lower end of the oblique flow hole a9 is higher than the lower end of the oblique flow hole b13.

[0041] The bottom of the cavity 14 is provided with a drainage mechanism, which includes a drainage hole 25. The water inlet end of the drainage hole 25 is provided with a movable sealing block 24. The sealing block 24 is movably sealed by a sealing ring b23. A limiting bolt 27 passes through the shell b22 and is connected to the sealing block 24. A spring 26 is sleeved on the outer periphery of the limiting bolt 27. The two ends of the spring 26 are respectively connected to the limiting bolt 27 and the outer wall of the shell b22. Spring 26 applies a force to seal block 24 to block drain hole 25. When it is necessary to drain water retained in movable chamber 14, pressing limit bolt 27 compresses spring 26, and limit bolt 27 pushes seal block 24 to move, so that seal block 24 no longer blocks drain hole 25. In this way, water in movable chamber 14 can be drained, thus not affecting the service life of solenoid valve 4. When limit bolt 27 is loosened, spring 26 will drive limit bolt 27 and seal block 24 to move synchronously, and block drain hole 25 again. When carbon dioxide or water flows, it will generate pressure on the side wall of seal block 24, and make seal block 24 exert pressure on drain hole 25, thus ensuring the sealing between the two.

[0042] The inner liner 10 is sealed to the inner wall of the housing b22 by a sealing ring a32; the axes of the oblique flow hole a9 and the oblique flow hole b13 are parallel.

[0043] The temperature sensor 3, integrator 5, pressure sensor 6, and flow sensor 17 described in this invention are all commercially available existing products.

[0044] Working Principle: During the alternating injection metering and control of carbon dioxide and water, the flow of the two media is controlled by the electrically controlled valve 4. When the two media flow in the first channel 2, the media identification sensor 16 identifies the type of media. Specifically, it distinguishes the media types by using the difference in conductivity signals between the two electrodes of carbon dioxide and water, and transmits the signal to the intelligent totalizer 5. Then, the flow sensor 17 measures the flow rate of the media. This enables automatic accumulation of carbon dioxide and water measurements, and allows for the metering and control of carbon dioxide and water using a single metering device on a single injection manifold. The original process of "dual skids + dual meters + dual systems" can be simplified to "one skid, one meter, one system + automatic control," making the process simpler and more convenient to control.

[0045] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-media flow integrated control device for automatically identifying carbon dioxide and water, characterized in that, include: A media identification and monitoring unit is used to identify and monitor media; Flow control unit, used to control the flow rate of the medium; And the media flow channel between the media identification and monitoring unit and the flow control unit.

2. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 1, characterized in that, The media flow channel includes a first channel (2) in the base a (1) on the side of the media identification and monitoring unit, and a second channel (12) in the base b (15) on the side of the flow control unit. The first channel (2) and the second channel (12) are connected. The base a (1) and the base b (15) are fixed together by bolts.

3. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 1, characterized in that, The media identification and monitoring unit includes a media identification sensor (16) and a flow sensor (17) with the detection end located in the first channel (2). The media identification sensor (16) and the flow sensor (17) are electrically connected to the integrator (5).

4. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 3, characterized in that, The medium identification and monitoring unit also includes a temperature sensor (3) and a pressure sensor (6) with their detection ends located in the first channel (2), both of which are electrically connected to the integrator (5).

5. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 4, characterized in that, The totalizer (5) is located on a housing a fixed to the base a (1), and the tops of the medium identification sensor (16), flow sensor (17), temperature sensor (3) and pressure sensor (6) are all located inside the housing a.

6. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 1, characterized in that, The flow control unit includes an electric valve (4), which includes a drive mechanism (7) fixed on the housing b (22). The drive mechanism (7) is connected to a drive valve core (8). The valve core (8) has an inverted T-shaped cross section, with the bottom of the inverted T-shaped section located below the inner bushing (10). The valve core (8) is slidably connected to the inner bushing (10) fixed in the housing b (22). A flow slowing mechanism (11) is provided in the cavity (14) at the bottom of the valve core (8).

7. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 3, characterized in that, The medium identification sensor (16) includes a sensor probe (20), a sensor core assembly (19), an epoxy resin sealant (21), and a sensor cover (18). One end of the sensor probe (20) is located inside the first channel (2), and the other end is embedded inside the sensor cover (18). The sensor core assembly (19) is located inside the sensor probe (20) and is wrapped by the epoxy resin sealant (21).

8. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 6, characterized in that, The slow-flow mechanism (11) includes an insert block b (31) that is sealed and fixed in the cavity (14) on the outer periphery, and an insert block a (28) that is fixed on the insert block b (31) by fastening bolts (33). The insert block a (28) has a flow guiding oblique hole a (29), and the insert block b (31) has a flow guiding oblique hole b (30). The flow guiding oblique hole a (29) and the flow guiding oblique hole b (30) are connected to form a flow guiding channel with a V-shaped cross section. The cavity (14) has oblique flow holes a (9) and oblique flow holes b (13) that are inclined upward along the flow direction of the medium. The lower end of the oblique flow hole a (9) is higher than the lower end of the oblique flow hole b (13).

9. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 6, characterized in that, The bottom of the cavity (14) is provided with a drainage mechanism, which includes a drainage hole (25). The water inlet end of the drainage hole (25) is provided with a movable sealing block (24). The sealing block (24) seals the drainage hole (25) through the sealing ring b (23). The limiting bolt (27) passes through the shell b (22) and is connected to the sealing block (24). A spring (26) is sleeved on the outer periphery of the limiting bolt (27). The two ends of the spring (26) are respectively connected to the limiting bolt (27) and the outer wall of the shell b (22).

10. The multi-media flow integrated control device for automatically identifying carbon dioxide and water according to claim 6, characterized in that, The inner liner (10) is sealed on the inner wall of the housing b (22) by a sealing ring a (32); the axes of the oblique flow hole a (9) and the oblique flow hole b (13) are parallel.

Images