CO2 salt water layer sealing experiment simulation device

Abstract

The utility model relates to the technical field of CO2 sealing and storage, and discloses a CO2 saline water layer sealing and storage experiment simulation device. Comprising a simulation chamber, the simulation chamber is in sealed connection with a CO2 conveying gas pipe, and an upper-layer partition plate and a lower-layer partition plate are arranged in the simulation chamber to form three cavities; vent holes are formed in the pipe walls, located at all the cavities, of the CO2 conveying gas pipe; each chamber is connected with a CO2 gas concentration sensor and a temperature sensor; a pressure sensor is further mounted at the top of the upper-layer chamber; each chamber is provided with a water inlet and a water outlet; a pressurizing opening is formed in the top side wall of the simulation chamber; a jacket layer is arranged on the outer wall of the simulation chamber, the upper-layer partition plate is of a hollow structure and is communicated with the jacket layer, the lower-layer partition plate is separated from the jacket layer, and an electric heating wire is arranged in the lower-layer partition plate; according to the utility model, the environment condition of each chamber can be adjusted for experiment; the problem that data measured by an existing simulation device is low in accuracy and reference is solved.

Description

Technical Field

[0001] This utility model relates to the field of CO2 storage technology, specifically to a CO2 brine layer storage experimental simulation device. Background Technology

[0002] Carbon capture technology (CCT), also known as carbon sequestration, is a key component of the carbon reduction technology CCUS (Carbon Capture, Utilization, and Storage). When fossil fuels are burned, carbon is emitted into the atmosphere as CO2. By capturing the CO2 produced from fuels and preventing it from being released into the atmosphere, and then injecting the CO2 into abandoned oil and gas fields or deep underground, carbon can be permanently stored, preventing global warming. This is carbon capture and storage technology. Carbon dioxide sequestration technology refers to capturing, compressing, and transporting carbon dioxide from large emission sources to selected locations for long-term storage, rather than releasing it into the atmosphere. Depending on the storage location, this technology can be divided into three main categories: geological sequestration, surface sequestration, and marine sequestration.

[0003] Carbon dioxide sequestration (CO2 sequestration) refers to the process of injecting captured CO2 into deep saline aquifers, depleted oil and gas reservoirs, and other geological bodies below the surface through engineering techniques, thereby achieving long-term isolation of CO2 from the atmosphere through structural sequestration. The carbon sequestration potential of geological formations is less than that of underground saline aquifers, as the former requires higher geological and operational conditions. Deep saline aquifers, however, offer significant potential for CO2 storage. Porous rocks deep underground are filled with saline water, which is unsuitable for drinking or irrigation, making it a promising storage method. Utilizing saline water in geological formations for CO2 sequestration has broad application prospects in reducing greenhouse gas emissions and addressing global warming. However, this technology also faces several challenges and problems that need to be addressed, requiring prior laboratory research. Currently, the simulation devices used in laboratory research are limited in function and cannot be adjusted and combined to simulate different geological depths. Furthermore, these devices are often simple in structure, only able to set the temperature and pressure within the simulation chamber. Because they cannot accurately reproduce changes in the geological environment, the accuracy and reliability of the measured data are low. Utility Model Content

[0004] This invention overcomes the shortcomings of the prior art and proposes a CO2 brine layer sequestration experimental simulation device, which can be used to simulate the experimental effects of CO2 brine layer sequestration at different depths and under different geological conditions, and can better simulate the process of CO2 geological sequestration.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A CO2 saline layer sealing experimental simulation device includes a simulation chamber, a CO2 delivery pipe sealed to the simulation chamber, one end of the CO2 delivery pipe located outside the simulation chamber connected to a gas cylinder, and the other end of the CO2 delivery pipe located inside the simulation chamber extending to the bottom of the simulation chamber; the simulation chamber is equipped with an upper partition and a lower partition; a lower chamber is formed between the lower partition and the bottom of the simulation chamber, a middle chamber is formed between the upper and lower partitions, and an upper chamber is formed between the upper partition and the top of the simulation chamber; the CO2 delivery pipe is located in the lower layer, Vent holes are provided on the pipe walls of the middle and upper chambers; CO2 gas concentration sensors and temperature sensors are connected to the lower, middle, and upper chambers; a pressure sensor is also installed on the top of the upper chamber; water inlets and drains are provided in the lower, middle, and upper chambers; a pressurization port is provided on the top side wall of the simulation chamber; the pressurization port is connected to a pressurization pump; the outer wall of the simulation chamber is provided with a jacket layer, the upper partition is a hollow structure, the upper partition is connected to the jacket layer, the lower partition is separated from the jacket layer, and an electric heating wire is provided inside the lower partition.

[0007] Furthermore, a hot medium inlet is provided at the bottom of the jacket layer, and a hot medium outlet is provided at the top of the jacket layer.

[0008] Furthermore, a hot water pump is connected to the inlet of the hot medium, and a solenoid valve is installed at the inlet of the hot medium. A temperature sensor connected to the upper chamber is electrically connected to the solenoid valve through a controller. The opening degree of the solenoid valve is controlled by the temperature data detected by the temperature sensor in the upper chamber.

[0009] Furthermore, the pressure sensor is electrically connected to the electronically controlled valve of the pressurized air pump via the controller. The opening of the electronically controlled valve is adjusted based on the pressure data detected by the pressure sensor, thereby regulating the pressure in the upper chamber.

[0010] Furthermore, a gas cylinder valve is connected to the top of the gas cylinder, and a pressure reducing valve, a gas flow control valve, and a gas flow regulator are installed on the CO2 delivery pipe.

[0011] Furthermore, a sealing cover is installed on the top of the simulation chamber, and a sealing ring is installed between the sealing cover and the top of the simulation chamber.

[0012] The beneficial effects of this utility model compared to the prior art are as follows:

[0013] This invention can simulate the sequestration of CO2 gas into a brine layer, and the monitoring device can contact the brine layer. The simulated brine chamber mimics an underground brine layer, and the temperature and pressure of each layer within the chamber can be controlled by temperature and pressure control devices to simulate CO2 sequestration at different depths and under different geological conditions, thus effectively simulating the geological sequestration process of CO2. Furthermore, based on different experimental conditions, the environmental conditions of each chamber can be adjusted to conduct different CO2 gas sequestration experiments; this invention solves the problem of low accuracy and reliability of measured data due to the inability to accurately reproduce changes in the geological environment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the CO2 brine layer sealing experimental simulation device described in this utility model;

[0015] Figure label:

[0016] 1-Gas cylinder, 2-Gas cylinder valve, 3-Pressure reducing valve, 4-Gas flow control valve, 5-Gas flow regulator, 6-CO2 delivery pipe, 7-Sealing ring, 8-Pressure sensor, 9-Jacket layer, 10-Simulation chamber, 11-Pressure port, 12-Heat medium inlet, 13-Pressure pump, 14-Heat medium outlet, 15-Upper partition, 16-Lower partition, 17-CO2 gas concentration sensor, 18-Pressure sensor, 19-Electric heating wire. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0018] See Figure 1This embodiment proposes a CO2 brine layer sealing experimental simulation device, including a simulation chamber 10, which is a sealed structure. The simulation chamber 10 is sealed with a CO2 delivery pipe 6. One end of the CO2 delivery pipe 6 located outside the simulation chamber 10 is connected to a gas cylinder 1, and the other end of the CO2 delivery pipe 6 located inside the simulation chamber 10 extends to the bottom of the simulation chamber 10. The simulation chamber 10 is used to hold brine, and the bottom of the CO2 delivery pipe 6 can be inserted into the brine to seal CO2 gas into the brine layer. An upper partition 15 and a lower partition 16 are provided inside the simulation chamber 10. The lower partition 16 and the bottom of the simulation chamber 10 form a lower chamber, the upper partition 15 and the lower partition 16 form a middle chamber, and the upper partition 15 and the top of the simulation chamber 10 form an upper chamber. Vent holes are provided on the pipe wall of the CO2 delivery pipe 6 at the lower, middle, and upper chambers. The lower, middle, and upper chambers are all connected to a CO2 gas concentration sensor 17 and a temperature sensor 18; a pressure sensor 8 is also installed on the top of the upper chamber; the lower, middle, and upper chambers are all equipped with water inlets and drain outlets; a pressurization port 11 is provided on the top side wall of the simulation chamber 10; the pressurization port 11 is connected to a pressurization pump 13; a certain pressure environment is provided to the upper chamber of the simulation chamber 10 through the pressurization port 11 and the pressurization pump 13.

[0019] The outer wall of the simulation chamber 10 is equipped with a jacket layer 9. A heat medium inlet 12 is located at the bottom of the jacket layer 9, and a heat medium outlet 14 is located at the top of the jacket layer 9. Hot water is introduced into the jacket layer 9 through the heat medium inlet 12 to heat the simulation chamber 10, and then discharged from the top heat medium outlet 14, raising the temperature of the brine in the simulation chamber 10 to a set range. The upper partition 15 is a hollow structure and is connected to the jacket layer 9, allowing the heat medium to flow into the upper partition 15 through the jacket layer 9. The lower partition 16 is also a hollow structure, separated from the jacket layer 9, and contains an electric heating wire 19. The heating temperature of the electric heating wire 19 differs from the heating temperature of the heat medium in the jacket layer 9 and can be controlled separately.

[0020] A hot water pump is connected to the hot medium inlet 12, and a solenoid valve is installed at the hot medium inlet 12. The temperature sensor 18 connected to the upper chamber is electrically connected to the solenoid valve through a controller. The opening degree of the solenoid valve is controlled by the temperature data detected by the temperature sensor 18 in the upper chamber, which is used to regulate the temperature in the upper chamber. At the same time, the pressure sensor 8 is electrically connected to the electric control valve of the pressurizing air pump 13 through a controller. The opening degree of the electric control valve is adjusted by the pressure data detected by the pressure sensor 8, which is used to regulate the pressure in the upper chamber.

[0021] The top of the gas cylinder 1 is connected to a gas cylinder valve 2, and the CO2 delivery pipe 6 is equipped with a pressure reducing valve 3, a gas flow control valve 4, and a gas flow regulator 5. The pressure and flow rate of the CO2 gas introduced into the brine are adjusted by the pressure reducing valve 3, the gas flow control valve 4, and the gas flow regulator 5.

[0022] The top of the simulation chamber 10 is equipped with a sealing cover, and a sealing ring 7 is provided between the sealing cover and the top of the simulation chamber 10 to further improve the sealing effect inside the simulation chamber 10.

[0023] The working principle of the CO2 brine layer sealing experimental simulation device proposed in this embodiment is as follows:

[0024] A certain concentration of brine is injected into the lower, middle, and upper chambers through the inlet. The upper chamber is not filled and has an air layer above it, while the middle and lower chambers are filled with brine. The hot water pump is turned on to inject hot water into the jacket layer 9 and the upper partition 15, and the electric heating wire 19 is turned on. This creates a temperature difference in the brine temperature from top to bottom in the simulation chamber 10, simulating the formation brine environment. The gas cylinder valve 2 is opened to introduce CO2 gas into the lower, middle, and upper chambers. The CO2 gas concentration sensor 17 detects the amount of CO2 gas sealed in the three chambers to determine the amount of CO2 gas sealed at different depths and temperatures.

[0025] Then, the pressurizing air pump 13 is turned on to pressurize the upper chamber. At the same time, the brine temperature in the three chambers is adjusted by controlling the opening of the electric heating wire 19 and the hot water pump to make the brine temperature the same. Furthermore, the amount of CO2 gas sealed in the three chambers is detected by the CO2 gas concentration sensor 17 to determine the amount of CO2 gas sealed under the same temperature but different pressures.

[0026] Furthermore, the environmental conditions of each chamber can be adjusted according to different experimental conditions to conduct various CO2 gas sequestration experiments. This device simulates CO2 brine sequestration at different depths and under different geological conditions.

[0027] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A CO2 saline layer sealing experimental simulation device, comprising a simulation chamber (10), wherein the simulation chamber (10) is sealed and connected to a CO2 delivery pipe (6), one end of the CO2 delivery pipe (6) located outside the simulation chamber (10) is connected to a gas cylinder (1), and the other end of the CO2 delivery pipe (6) located inside the simulation chamber (10) extends to the bottom of the simulation chamber (10); characterized in that, The simulation chamber (10) is equipped with an upper partition (15) and a lower partition (16); the lower partition (16) forms a lower chamber with the bottom of the simulation chamber (10), the upper partition (15) and the lower partition (16) form a middle chamber, and the upper partition (15) and the top of the simulation chamber (10) form an upper chamber; the CO2 delivery pipe (6) is provided with vent holes on the pipe walls of the lower, middle, and upper chambers; the lower, middle, and upper chambers are all connected to a CO2 gas concentration sensor (17) and a temperature sensor (18). 18); A pressure sensor (8) is also installed on the top of the upper chamber; the lower, middle and upper chambers are all equipped with water inlets and drains; a pressurization port (11) is provided on the top side wall of the simulation chamber (10); the pressurization port (11) is connected to a pressurization air pump (13); the outer wall of the simulation chamber (10) is equipped with a jacket layer (9), the upper partition (15) is a hollow structure, the upper partition (15) is connected to the jacket layer (9), the lower partition (16) is separated from the jacket layer (9), and an electric heating wire (19) is provided inside the lower partition (16).

2. The CO2 brine layer sealing experimental simulation device according to claim 1, characterized in that, A heat medium inlet (12) is provided at the bottom of the jacket layer (9), and a heat medium outlet (14) is provided at the top of the jacket layer (9).

3. The CO2 brine layer sealing experimental simulation device according to claim 2, characterized in that, A hot water pump is connected to the hot medium inlet (12), and a solenoid valve is installed at the hot medium inlet (12). The temperature sensor (18) connected to the upper chamber is electrically connected to the solenoid valve through the controller. The opening degree of the solenoid valve is controlled by the temperature data in the upper chamber detected by the temperature sensor (18).

4. The CO2 brine layer sealing experimental simulation device according to claim 3, characterized in that, The pressure sensor (8) is electrically connected to the electric control valve of the pressurized air pump (13) through the controller. The opening of the electric control valve is adjusted by the pressure data detected by the pressure sensor (8) to regulate the pressure in the upper chamber.

5. The CO2 brine layer sealing experimental simulation device according to claim 1, characterized in that, The top of the gas cylinder (1) is connected to a gas cylinder valve (2), and the CO2 delivery pipe (6) is equipped with a pressure reducing valve (3), a gas flow control valve (4) and a gas flow regulator (5).

6. The CO2 brine layer sealing experimental simulation device according to claim 1, characterized in that, The top of the simulation chamber (10) is provided with a sealing cover, and a sealing ring (7) is provided between the sealing cover and the top of the simulation chamber (10).

Images