Carbon dioxide pressurization and delivery device, online monitoring system thereof and mobile unit

Abstract

The application discloses a carbon dioxide pressurization conveying device and a mobile unit, which comprises a carbon dioxide pipeline, a liquid carbon dioxide pressurization conveying pump unit and a driving unit; the carbon dioxide pipeline is connected with the input end of the liquid carbon dioxide pressurization conveying pump unit through an inflow pipeline; the output end of the liquid carbon dioxide pressurization conveying pump unit is connected with a deep well through an outflow pipeline; and the driving unit drives the operation of the liquid carbon dioxide pressurization conveying pump unit. The application improves the total amount of carbon dioxide medium per unit time for deep underground pressurization conveying and long-distance pressurization conveying, and further improves the working pressure of the liquid carbon dioxide medium.

Description

Technical Field

[0001] This invention relates to a carbon dioxide booster conveying device, and more specifically, to a carbon dioxide booster conveying device and its online monitoring system, as well as a mobile unit. Background Technology

[0002] Currently, in devices for long-distance carbon dioxide transportation and deep underground burial, compressors are generally used for high-pressure gaseous transportation and deep burial, such as... Figure 1 As shown, during the process of compressor 100 transporting carbon dioxide, the volumetric efficiency of multi-stage compression is relatively low. Due to factors such as heat generation during gas compression, the overall efficiency of compressor 100 is relatively low. Figure 2 As shown, the compressor 100 also has an external cooling jacket for cooling, which further increases the power consumption of gaseous carbon dioxide. Summary of the Invention

[0003] To address the aforementioned deficiencies in the existing technology, the purpose of this invention is to provide a carbon dioxide boosting and conveying device and its online monitoring system, as well as a mobile unit, which increases the total amount of carbon dioxide medium delivered per unit time for deep underground burial and long-distance pressurized conveying, and further improves the working pressure of liquid carbon dioxide medium.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The first aspect of the present invention provides a carbon dioxide boosting and conveying device, including a carbon dioxide pipeline, a liquid carbon dioxide boosting and conveying pump unit, and a drive unit;

[0006] The carbon dioxide pipeline is connected to the input end of the liquid carbon dioxide booster pump unit via an inlet pipeline;

[0007] The output end of the liquid carbon dioxide booster pump unit is connected to the deep buried well through the outlet pipeline;

[0008] The drive unit drives the operation of the liquid carbon dioxide booster pump unit.

[0009] Preferably, the liquid carbon dioxide booster pump unit includes a carbon dioxide booster pump;

[0010] The input end of the carbon dioxide booster pump is connected to the inlet pipeline, and the output end is connected to the outlet pipeline.

[0011] A magnetic filter is installed on the inlet pipe, and a safety valve is installed on the outlet pipe;

[0012] Preferably, the carbon dioxide booster pump is also provided with a pump return pipe connected to the inlet pipe;

[0013] The safety valve is also provided with a bypass that is connected to the inlet pipe.

[0014] Preferably, the liquid carbon dioxide booster pump unit includes a carbon dioxide storage tank, a carbon dioxide compressor, and a carbon dioxide booster pump that are connected in sequence through the inlet pipeline;

[0015] The input end of the carbon dioxide storage tank is connected to the carbon dioxide pipeline;

[0016] A carbon dioxide collection tank is provided on the inlet pipeline between the carbon dioxide compressor and the carbon dioxide booster pump.

[0017] Preferably, the liquid carbon dioxide booster pump unit includes a carbon dioxide storage tank, a carbon dioxide compressor, a refrigeration unit, and a carbon dioxide booster pump that are connected in sequence through the inlet pipeline;

[0018] The input end of the carbon dioxide storage tank is connected to the carbon dioxide pipeline;

[0019] A carbon dioxide collection tank is provided on the inlet pipe between the refrigeration device and the carbon dioxide booster pump.

[0020] Preferably, the drive unit is an electric motor or an internal combustion engine.

[0021] The second aspect of the present invention provides an online monitoring system for a carbon dioxide booster delivery device, comprising a pressure sensor, a temperature sensor, a flow meter, and a cloud platform for establishing data communication with the pressure sensor, temperature sensor, and flow meter, all mounted on the carbon dioxide booster delivery device provided in the first aspect of the present invention.

[0022] Preferably, the pressure sensor and the temperature sensor are located on the inlet pipe and the outlet pipe.

[0023] Preferably, the flow meter is located in the pump return pipe or the bypass.

[0024] A third aspect of the present invention provides a mobile unit of a carbon dioxide booster delivery device, comprising a transport vehicle and the carbon dioxide booster delivery device provided in the first aspect of the present invention mounted on the transport vehicle.

[0025] The carbon dioxide booster delivery device and its online monitoring system, along with the mobile unit provided by this invention, increase the total amount of carbon dioxide medium delivered per unit time for deep underground burial and long-distance pressurization. It also facilitates interaction with high-temperature underground oil, and the strong energy exchange helps improve oil displacement efficiency while saving energy consumption for carbon dioxide-mediated oil displacement. The working pressure of the liquid carbon dioxide medium is further increased, and the power consumption of the pump and compressor working together is far lower than that of a single compressor achieving the same boost ratio. The unit can be easily moved to different locations using a transport vehicle, avoiding the need for long-distance carbon dioxide delivery pipelines. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the frame structure of an existing carbon dioxide conveying device;

[0027] Figure 2 This is a schematic diagram illustrating the state change process of compressed carbon dioxide medium in an existing carbon dioxide delivery device.

[0028] Figure 3 This is a schematic diagram of the frame structure of Embodiment 1 of the carbon dioxide booster conveying device of the present invention;

[0029] Figure 4 This is a schematic diagram of the frame structure of Embodiment 2 of the carbon dioxide booster conveying device of the present invention;

[0030] Figure 5 yes Figure 4 Schematic diagram of the state change process of carbon dioxide medium;

[0031] Figure 6 This is a schematic diagram of the frame structure of Embodiment 3 of the carbon dioxide booster conveying device of the present invention;

[0032] Figure 7 yes Figure 6 Schematic diagram of the state change process of carbon dioxide medium;

[0033] Figure 8 This is a schematic diagram of the frame structure of the online monitoring system of the carbon dioxide booster delivery device of the present invention;

[0034] Figure 9 This is a schematic diagram of the frame structure of the mobile unit of the carbon dioxide booster and conveying device of the present invention. Detailed Implementation

[0035] To better understand the above-mentioned technical solutions of the present invention, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] The present invention provides a carbon dioxide boosting and conveying device, which includes a carbon dioxide pipeline 1, a liquid carbon dioxide boosting and conveying pump unit and a drive unit 2.

[0037] Carbon dioxide pipeline 1 is connected to the input end of the liquid carbon dioxide booster pump unit via inlet pipeline 3.

[0038] The output end of the liquid carbon dioxide booster pump unit is connected to the deep buried well 5 through the outlet pipeline 4;

[0039] Drive unit 2 drives the operation of the liquid carbon dioxide booster pump unit.

[0040] Liquid carbon dioxide is transported from its production site to locations requiring deep burial (such as oil fields, underground caves, and deep-sea trenches) via tanker trucks. After vaporization, the liquid carbon dioxide is then transported for deep burial using liquid carbon dioxide booster pump units. The vaporization process also consumes energy. Carbon dioxide gas has a low volumetric density, while liquid carbon dioxide has a volumetric density more than 500 times that of gas. Therefore, using liquid carbon dioxide booster pump units increases the total amount of carbon dioxide transported per unit time for deep underground burial and long-distance pressurized transport.

[0041] Combination Figure 3 As shown, the liquid carbon dioxide booster pump unit includes a carbon dioxide booster pump 6.

[0042] The input end of the carbon dioxide booster pump 6 is connected to the inlet pipe 3, and the output end is connected to the outlet pipe 4.

[0043] A magnetic filter 7 is installed on the inlet pipe 3. A safety valve 8 is installed on the outlet pipe 4.

[0044] The carbon dioxide booster pump 6 is also equipped with a pump return pipe 9 that is connected to the inlet pipe 3.

[0045] The safety valve 8 is also equipped with a bypass 10 connected to the inlet pipe 3. When the outlet flow of the carbon dioxide booster pump 6 is too low, the outlet of the carbon dioxide booster pump 6 is bypassed to ensure the safe and reliable operation of the carbon dioxide booster pump 6.

[0046] Liquid carbon dioxide is used for oilfield flooding because it is low-temperature (around -20°C) and high-density. Once underground, it interacts more easily with the high-temperature oil fluids, resulting in a strong energy exchange that improves flooding efficiency and saves energy.

[0047] Combination Figure 4 As shown, the liquid carbon dioxide booster pump unit includes a carbon dioxide storage tank 11, a carbon dioxide compressor 12, and a carbon dioxide booster pump 6, which are connected in sequence through an inlet pipe 3.

[0048] The input end of the carbon dioxide storage tank 11 is connected to the carbon dioxide pipeline 1.

[0049] A carbon dioxide collection tank 13 is provided on the inlet pipe 3 between the carbon dioxide compressor 12 and the carbon dioxide booster pump 6.

[0050] A carbon dioxide storage tank 11, a carbon dioxide compressor 12, and a carbon dioxide booster pump 6 are connected in series for pressurized delivery. A carbon dioxide collection tank 13 buffers, stabilizes, and collects the pulsating pressure and flow generated by the carbon dioxide compressor 12, ensuring a stable inflow state for the pump. The carbon dioxide compressor 12 can be a single unit or multiple units connected in parallel to meet the working flow requirements of the carbon dioxide booster pump 6. The process of carbon dioxide medium state change under the series operation of the carbon dioxide booster pump 6 and the carbon dioxide compressor 12 is described below. Figure 5 As shown.

[0051] When operating in series, the carbon dioxide compressor 12 compresses the carbon dioxide medium from gas to supercritical, and the carbon dioxide gas becomes a supercritical liquid. Through the carbon dioxide booster pump 6, the working pressure of the liquid carbon dioxide medium is further increased. The power consumption of the combined operation of the carbon dioxide booster pump 6 and the carbon dioxide compressor 12 is much lower than the power consumption of a single compressor to achieve the same boost ratio.

[0052] Combination Figure 6 As shown, the liquid carbon dioxide booster pump unit includes a carbon dioxide storage tank 11, a carbon dioxide compressor 12, a refrigeration unit 14, and a carbon dioxide booster pump 6, which are connected in sequence through an inlet pipeline.

[0053] The input end of the carbon dioxide storage tank 11 is connected to the carbon dioxide pipeline 1.

[0054] A carbon dioxide collection tank 13 is provided on the inlet pipe 3 between the refrigeration unit 14 and the carbon dioxide booster pump 6.

[0055] A carbon dioxide storage tank 11, a carbon dioxide compressor 12, a refrigeration unit 14, and a carbon dioxide booster pump 6 are connected in series for pressurized delivery. The carbon dioxide is compressed by the carbon dioxide compressor 12, then isobarically cooled by the refrigeration unit 14, liquefying the carbon dioxide medium. The outlet pressure of the liquid carbon dioxide medium is then increased by the carbon dioxide booster pump 6. The overall efficiency of this series connection is greater than that of the compressor unit. The process of carbon dioxide medium state change under the series operation of the carbon dioxide storage tank 11, carbon dioxide compressor 12, refrigeration unit 14, and carbon dioxide booster pump 6 is shown below. Figure 7 As shown.

[0056] Drive unit 2 uses an electric motor or an internal combustion engine.

[0057] Combination Figure 8 As shown, the present invention also provides an online monitoring system for a carbon dioxide booster conveying device, comprising a pressure sensor, a temperature sensor, a flow meter installed on the carbon dioxide booster conveying device, and a cloud platform 15 for establishing data communication with the pressure sensor, temperature sensor, and flow meter. The specific settings are as follows:

[0058] The first pressure sensor 16 and the second pressure sensor 17, which are installed on the inlet pipe 1, are located on both sides of the magnetic filter 7 to monitor the pressure of the medium in the inlet pipe 1 on both sides of the magnetic filter 7.

[0059] The third pressure sensor 18 and the fourth pressure sensor 19, which are installed on the outflow pipe 4, are located on both sides of the safety valve 8 to monitor the medium pressure in the outflow pipe 4 on both sides of the safety valve 8.

[0060] A first temperature sensor 20 is installed on the inlet pipe 1 to monitor the temperature of the medium inside the inlet pipe 1.

[0061] The second temperature sensor 21 and the third temperature sensor 22, which are installed on the outflow pipe 4, are located on both sides of the safety valve 8 to monitor the temperature of the medium in the outflow pipe 4 on both sides of the safety valve 8.

[0062] A first flow meter 23 is installed on the pump return pipe 9 to monitor the flow rate of the medium in the pump return pipe 9.

[0063] A second flow meter 24 is installed on the bypass 10 to monitor the flow rate of the medium in the bypass 10.

[0064] Because the three phases of carbon dioxide—liquid, gas, and solid—easily transform into each other, pressure and temperature sensors are used for state monitoring. Additionally, flow meters are installed on the pump return pipe 9 and bypass 10 to monitor the flow state of the carbon dioxide medium.

[0065] Combination Figure 9 As shown, the present invention also provides a mobile unit of a carbon dioxide booster conveying device, including a transport vehicle 200 and the carbon dioxide booster conveying device of the present invention mounted on the transport vehicle 200.

[0066] Liquid carbon dioxide is transported underground to different wellheads in different deep-buried areas. The liquid carbon dioxide is transported from the production site to the deep-buried wellhead by a transport vehicle 200, where a liquid carbon dioxide booster pump unit transports the liquid carbon dioxide underground for deep burial.

[0067] Fixed, distributed liquid carbon dioxide booster pump units are installed at various deep-buried wellheads. This method of deep burial work incurs significant investment due to high installation and maintenance costs, low utilization rates, and various other expenses. Therefore, mobile liquid carbon dioxide booster pump units offer a convenient alternative for deep burial work at different wellheads. Using a transport vehicle 200, the liquid carbon dioxide booster pump units can be easily moved to different locations, avoiding the need for long-distance carbon dioxide delivery pipelines.

[0068] Those skilled in the art should recognize that the above embodiments are merely illustrative of the present invention and are not intended to limit the present invention. Any variations or modifications to the above embodiments that are within the spirit and essence of the present invention will fall within the scope of the claims of the present invention.

Claims

1. A carbon dioxide booster conveying device, characterized in that: Includes carbon dioxide pipelines, liquid carbon dioxide booster pump units, and drive units; The carbon dioxide pipeline is connected to the input end of the liquid carbon dioxide booster pump unit via an inlet pipeline; a magnetic filter is provided on the inlet pipeline; The output end of the liquid carbon dioxide booster pump unit is connected to the deep buried well through an outlet pipeline; a safety valve is installed on the outlet pipeline. The drive unit drives the operation of the liquid carbon dioxide booster pump unit. The liquid carbon dioxide booster pump unit includes a carbon dioxide storage tank, a carbon dioxide compressor, and a carbon dioxide booster pump that are connected in sequence through the inlet pipeline; the input end of the carbon dioxide storage tank is connected to the carbon dioxide pipeline; a carbon dioxide collection tank is provided on the inlet pipeline between the carbon dioxide compressor and the carbon dioxide booster pump; and the carbon dioxide booster pump is also provided with a pump return pipe connected to the inlet pipeline. The safety valve is also equipped with a bypass connected to the inlet pipeline. When the outlet flow rate of the carbon dioxide booster pump is too low, the outlet bypass of the carbon dioxide booster pump is activated to ensure the safe and reliable operation of the carbon dioxide booster pump. The inlet pipe is equipped with a first pressure sensor and a second pressure sensor, which are located on both sides of the magnetic filter to monitor the medium pressure in the inlet pipes on both sides of the magnetic filter. The outflow pipeline is equipped with a third pressure sensor and a fourth pressure sensor, which are located on both sides of the safety valve to monitor the medium pressure in the outflow pipeline on both sides of the safety valve. A first temperature sensor is installed on the inlet pipe to monitor the temperature of the medium inside the inlet pipe; The outflow pipe is equipped with a second temperature sensor and a third temperature sensor, which are located on both sides of the safety valve to monitor the temperature of the medium in the outflow pipes on both sides of the safety valve. The pump return pipe is equipped with a first flow meter to monitor the flow rate of the medium in the pump return pipe; A second flow meter is installed on the bypass to monitor the flow rate of the medium in the bypass; the three-phase states of the carbon dioxide medium, namely liquid, gas and solid, are easily interchangeable, and the state is monitored by pressure sensor and temperature sensor; the flow state of the carbon dioxide medium is monitored by the first flow meter installed on the pump return pipe and the second flow meter installed on the bypass. The carbon dioxide compressor compresses the carbon dioxide medium from a gas to a supercritical liquid state, and the carbon dioxide gas becomes a supercritical liquid. Through the carbon dioxide booster pump, the working pressure of the liquid carbon dioxide medium is further increased. The power consumption of the combined operation of the carbon dioxide booster pump and the carbon dioxide compressor is much lower than the power consumption of a single compressor to achieve the same boost ratio.

2. The carbon dioxide booster conveying device according to claim 1, characterized in that: The input end of the carbon dioxide booster pump is connected to the inlet pipeline, and the output end is connected to the outlet pipeline.

3. The carbon dioxide booster conveying device according to claim 1, characterized in that: The liquid carbon dioxide booster pump unit also includes a refrigeration device located between the carbon dioxide compressor and the carbon dioxide collection tank.

4. The carbon dioxide booster conveying device according to claim 1, characterized in that: The drive unit is an electric motor or an internal combustion engine.

5. An online monitoring system for a carbon dioxide booster delivery device, characterized in that: It includes a pressure sensor, a temperature sensor, a flow meter, and a cloud platform that establishes data communication with the pressure sensor, temperature sensor, and flow meter, all mounted on the carbon dioxide booster delivery device as described in any one of claims 1-4.

6. A mobile unit of a carbon dioxide booster conveying device, comprising a transport vehicle, characterized in that: It also includes a carbon dioxide pressurization and delivery device as described in any one of claims 1-4, which is installed on the transport vehicle.

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