A large-scale co2 ocean dissolution sequestration simulation device system

Abstract

The application discloses a large CO2 ocean dissolving storage simulation device system and belongs to the technical field of CO2 ocean dissolving storage, which comprises a large CO2 ocean dissolving storage reaction kettle, a seawater circulation and injection system, an ocean temperature simulation system, a CO2 pressurization injection and recovery system and a data acquisition and control system, wherein the seawater circulation and injection system and the CO2 pressurization injection and recovery system are communicated with the large CO2 ocean dissolving storage reaction kettle. The large CO2 ocean dissolving storage simulation device system adopts the above structure, and can reduce the temperature, pressure, wave, ocean current and other conditions of CO2 ocean dissolving storage under the laboratory conditions, so as to realize the injection and dissolving storage process of CO2 in seawater under the conditions of various seawater flow states, different water depths, temperatures, injection flow rates and injection flow velocities.

Description

Technical Field

[0001] This invention relates to the field of CO2 marine dissolution and storage technology, and in particular to a large-scale CO2 marine dissolution and storage simulation device system. Background Technology

[0002] Currently, CO2 capture, utilization, and storage (CCUS) is a necessary means to reduce atmospheric CO2 emissions and mitigate climate change, while CO2 geological storage is the fundamental way to reduce CO2 levels. CO2 geological storage technologies mainly include terrestrial storage and marine storage. Common locations for terrestrial storage include abandoned oil and gas reservoirs, deep coal seams, and brackish water layers. However, terrestrial storage requires comprehensive consideration of various influencing factors and has relatively stringent environmental requirements. In contrast, marine storage has greater potential.

[0003] Ocean sequestration involves transporting captured CO2 via pipelines or ships and injecting it into the deep ocean, where it can be stored for centuries. Compared to the challenges of terrestrial carbon sequestration, ocean dissolution sequestration has its own unique characteristics and advantages, such as large storage capacity and lower safety risks after leakage. However, CO2 injected into the deep sea can be in gaseous, liquid, solid, or hydrated form, and the dissolution rate varies depending on the form. Increasing the concentration of CO2 in seawater can have adverse effects on marine life, such as reducing biological calcification, reproductive and growth rates, and migration capabilities. Although CO2 ocean sequestration has undergone nearly 30 years of theoretical development, laboratory experiments, small-scale field tests, and model simulation studies, large-scale operational examples of CO2 ocean sequestration are still lacking.

[0004] To address the problems existing in the current CO2 dissolution process in the ocean, this invention provides a large-scale CO2 ocean dissolution and storage simulation device system. Summary of the Invention

[0005] The purpose of this invention is to provide a large-scale CO2 ocean dissolution and storage simulation device system that can reproduce the temperature, pressure, waves, ocean currents and other conditions of CO2 ocean dissolution and storage under laboratory conditions, and realize the simulation of CO2 injection and dissolution and storage process in seawater under various seawater flow states, different water depths, temperatures, injection flow rates and injection velocities.

[0006] To achieve the above objectives, the present invention provides a large-scale CO2 ocean dissolution and storage simulation device system, including a large-scale CO2 ocean dissolution and storage reactor, a seawater circulation and injection system, an ocean temperature simulation system, a CO2 pressurization injection and recovery system, and a data acquisition and control system. The seawater circulation and injection system and the CO2 pressurization injection and recovery system are both connected to the large-scale CO2 ocean dissolution and storage reactor.

[0007] Preferably, the ocean temperature simulation system includes a walk-in low-temperature chamber and a seawater precooling and salinity adjustment device. The large-scale CO2 ocean dissolution and storage reactor, the CO2 pressurization injection and recovery system, the seawater circulation and injection system, and the data acquisition and control system are all located in the walk-in low-temperature chamber.

[0008] Preferably, the large-scale CO2 marine dissolution and storage reactor includes a reactor body, a wave-generating system, and nozzles. The nozzles are installed inside the reactor body via nozzle connection pipes, which extend out of the end cap of the reactor body and are connected to a motor.

[0009] Preferably, the CO2 pressurization injection and recovery system includes a back pressure valve, a first booster pump, a CO2 waste storage tank, a CO2 cylinder, a high-pressure storage tank, a second booster pump, a high-pressure pressure reducing valve, and a booster injection pump. One side of the high-pressure pressure reducing valve is connected to the second booster pump and the high-pressure storage tank, respectively. The second booster pump is connected to the CO2 waste storage tank and the CO2 cylinder, respectively. The high-pressure storage tank is connected to the CO2 waste storage tank and the CO2 cylinder, respectively, via a dedicated booster pump. The other side of the high-pressure pressure reducing valve is connected to the seawater precooling and salinity adjustment device, which is connected to the booster injection pump. The booster injection pump is connected to the reactor body.

[0010] Preferably, the other end of the CO2 waste gas storage tank is connected to the first booster pump, the first booster pump is connected to the back pressure valve, and the back pressure valve is connected to the reactor body.

[0011] Preferably, the other end of the high-pressure storage tank is connected to the high-pressure pressure reducing valve.

[0012] Preferably, the seawater circulation and injection system includes a seawater circulation injection pump connected to the reactor body, the seawater circulation injection pump being connected to the seawater precooling and salinity adjustment device, and the seawater precooling and salinity adjustment device being connected to the reactor body.

[0013] Preferably, the data acquisition and control system includes a viewing light source, a high-definition CCD camera, a computer, and a software control system.

[0014] Preferably, the seawater circulation and injection system and the large CO2 marine dissolution and storage reactor are equipped with multiple sensors, including sensors for monitoring temperature, pressure difference, salinity, liquid level, pH, and harmful gases. The sensors are connected to the computer via a sensor bus, which connects all sensor signals to the computer, and the software control system monitors all parameters of the entire experimental device in real time.

[0015] Therefore, the present invention provides a large-scale CO2 ocean dissolution and storage simulation device system, which recreates the temperature, pressure, waves, ocean currents and other conditions of CO2 ocean dissolution and storage under laboratory conditions, and realizes the simulation of CO2 injection and dissolution and storage process in seawater under various seawater flow states, different water depths, temperatures, injection flow rates and injection velocities.

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of a large-scale CO2 marine dissolution and storage simulation device system according to the present invention;

[0018] The components include: 1. Walk-in low-temperature chamber; 2. Seawater precooling and salinity adjustment device; 3. Seawater circulation injection pump; 4. Large CO2 marine dissolution and storage reactor; 401. Wave-making system; 402. Motor; 403. Nozzle; 5. CO2 cylinder; 6. Back pressure valve; 7. Second booster pump; 8. High-pressure pressure reducing valve; 9. Booster injection pump; 10. Viewing window light source; 11. High-definition CCD camera; 12. CO2 waste gas storage tank; 13. Dedicated booster pump; 14. High-pressure storage tank; 15. First booster pump. Detailed Implementation

[0019] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0021] Example

[0022] Each component of the ocean temperature simulation system, CO2 pressurization and recovery system, seawater circulation system, large-scale CO2 ocean dissolution and storage reactor, and data acquisition and control system is equipped with corresponding valves.

[0023] All components in this apparatus that come into direct contact with the experimental fluid are made of corrosion-resistant materials. Specifically, the reactor body, nozzles, and nozzle connecting pipes in the large CO2 marine dissolution and storage reactor are made of duplex steel 22053, which possesses high strength, good impact toughness, good overall and local stress resistance, and resistance to weak acid corrosion, and can withstand pressures up to 20 MPa. The pipes and valves in the CO2 pressurization and recovery system and the seawater circulation and injection system are made of materials such as titanium alloy, duplex steel 2205S, and 316 stainless steel, and can withstand pressures up to 20 MPa. All sensors and overload protection devices involved in the data acquisition and control system are seawater corrosion-resistant equipment.

[0024] This invention provides a large-scale CO2 ocean dissolution and sequestration simulation device system, the specific experimental process of which is as follows:

[0025] Step 1: Pre-cooling and pressurization before the experiment:

[0026] ① Set the temperatures of the walk-in low-temperature chamber 1 and the seawater precooling and salinity adjustment device 2 to the target temperature;

[0027] ② Prepare seawater by injecting it into the seawater circulation system through the seawater circulation injection pump 3. The seawater flows through the seawater precooling and salinity adjustment device 2 and the large CO2 marine dissolution and storage reactor 4 in sequence. After the liquid level in the reactor reaches the target value, stop the seawater injection and close the injection port of the seawater circulation injection pump to start the circulation of seawater.

[0028] ③ Open the valve at CO2 cylinder 5 and activate the overload protection device at the reactor—back pressure valve 6. The CO2 in CO2 cylinder 5 flows sequentially through the second booster pump 7, high pressure reducing valve 8, seawater precooling and salinity adjustment device 2, and booster injection pump 9 into the large CO2 marine dissolution and storage reactor 4 to pressurize the reactor. After the target pressure is reached, the CO2 injection is stopped.

[0029] Step 2, Experimental Procedure:

[0030] ① Set the experimental parameters of the large CO2 marine dissolution and storage reactor 4, turn on the wave-making system 401, and control the movement of the nozzle 403 through the motor 402;

[0031] ② Turn on the window light source 10, high-definition CCD camera 11 and various sensors in the data acquisition and control system to record experimental data. Monitor the parameters of the entire experimental device in real time through the software control system and keep the back pressure valve 6 open to maintain constant pressure inside the vessel.

[0032] ③ CO2 is injected after all parameters in the large CO2 marine dissolution and storage reactor 4 reach the target values.

[0033] CO2 injection can be divided into the following two cases:

[0034] 1) The CO2 injected is in a gaseous state. The CO2 in the CO2 cylinder 5 or CO2 waste gas storage tank 12 flows through the second booster pump 7, the high pressure reducing valve 8, and the seawater precooling and salinity adjustment device 2 in sequence. Finally, the flow rate and velocity are adjusted by the booster injection pump 9 and then injected into the reactor through the nozzle 403.

[0035] 2) The injected CO2 is in liquid state. The CO2 in CO2 cylinder 5 or CO2 waste gas storage tank 12 is liquefied by a special booster pump 13 and stored in a high-pressure storage tank 14. After the liquid CO2 flows through the high-pressure pressure reducer 8 and the seawater pre-cooling and salinity adjustment device 2, the flow rate and velocity are finally adjusted by the booster injection pump 9 and then sprayed into the reactor through the nozzle 403 for dissolution research.

[0036] During the experiment, the exhaust gas CO2 is pumped into the CO2 exhaust gas storage tank 12 by the first booster pump 15. The CO2 exhaust gas storage tank 12 can dry the gas stored in it and recycle the CO2.

[0037] In addition, the seawater circulation and injection system and the large CO2 marine dissolution and storage reactor 4 in this device are equipped with multiple sensors, including sensors for temperature, pressure difference, salinity, liquid level, pH, and harmful gas monitoring. The sensors are connected to the computer 16 through a sensor bus, and the sensor bus connects all sensor signals to the computer 16. The software control system monitors all parameters of the experimental device in real time.

[0038] Therefore, the present invention provides a large-scale CO2 ocean dissolution and sequestration simulation device system, which can simulate the injection of CO2 into seawater under various seawater flow states, angles, pressures, and outlet conditions, and simulate the dissolution and sequestration of CO2 on the seabed on the largest possible scale under laboratory conditions.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A large-scale CO2 marine dissolution and sequestration simulation device system, characterized in that: It includes a large-scale CO2 marine dissolution and storage reactor, a seawater circulation and injection system, a marine temperature simulation system, a CO2 pressurization injection and recovery system, and a data acquisition and control system. The seawater circulation and injection system and the CO2 pressurization injection and recovery system are both connected to the large-scale CO2 marine dissolution and storage reactor. The ocean temperature simulation system includes a walk-in low-temperature chamber and a seawater precooling and salinity adjustment device. The large-scale CO2 ocean dissolution and storage reactor, the CO2 pressurization injection and recovery system, the seawater circulation and injection system, and the data acquisition and control system are all located in the walk-in low-temperature chamber. The large-scale CO2 marine dissolution and storage reactor includes a reactor body, a wave-making system, and nozzles. The nozzles are installed inside the reactor body via nozzle connection pipes, which extend out of the end cap of the reactor body and are connected to a motor. The CO2 pressurization injection and recovery system includes a back pressure valve, a first booster pump, a CO2 waste storage tank, a CO2 cylinder, a high-pressure storage tank, a second booster pump, a high-pressure pressure reducing valve, and a booster injection pump. One side of the high-pressure pressure reducing valve is connected to the second booster pump and the high-pressure storage tank. The second booster pump is connected to the CO2 waste storage tank and the CO2 cylinder. The high-pressure storage tank is connected to the CO2 waste storage tank and the CO2 cylinder via a dedicated booster pump. The other side of the high-pressure pressure reducing valve is connected to the seawater precooling and salinity adjustment device. The seawater precooling and salinity adjustment device is connected to the booster injection pump. The booster injection pump is connected to the reactor body. Multiple sensors are evenly distributed on the seawater circulation and injection system and the large CO2 ocean dissolution and storage reactor.

2. The large-scale CO2 marine dissolution and storage simulation device system according to claim 1, characterized in that: The other end of the CO2 waste gas storage tank is connected to the first booster pump, the first booster pump is connected to the back pressure valve, and the back pressure valve is connected to the reactor body.

3. A large-scale CO2 marine dissolution and storage simulation device system according to claim 2, characterized in that: The other end of the high-pressure storage tank is connected to the high-pressure pressure reducing valve.

4. A large-scale CO2 marine dissolution and storage simulation device system according to claim 3, characterized in that: The seawater circulation and injection system includes a seawater circulation injection pump connected to the reactor body, the seawater circulation injection pump being connected to the seawater precooling and salinity adjustment device, and the seawater precooling and salinity adjustment device being connected to the reactor body.

5. A large-scale CO2 marine dissolution and storage simulation device system according to claim 4, characterized in that: The data acquisition and control system includes a viewing light source, a high-definition CCD camera, a computer, and a software control system.

6. A large-scale CO2 marine dissolution and storage simulation device system according to claim 5, characterized in that: The sensor is connected to the computer via a sensor bus.

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