Buried carbon dioxide storage system

Abstract

The invention relates to the technical field of carbon dioxide storage, and discloses a buried carbon dioxide storage system which comprises a buried storage container module, a gas injection module, a monitoring module, a pressure adjusting module, a cyclic utilization module, an emergency processing module, an intelligent control module and a multi-layer protection module. The buried storage container module is used for storing the liquid carbon dioxide through a storage container deeply buried underground; through the buried design and the multi-layer protection module, the storage efficiency and stability of carbon dioxide are remarkably improved, and meanwhile, the influence of gas leakage and temperature fluctuation on the container is prevented; the cyclic utilization module recovers heat generated in the storage process and is used for providing clean energy support for equipment, so that the operation cost is reduced, and the overall economic benefit of the system is improved; when the emergency processing module monitors abnormal conditions, the emergency pressure release valve and the gas absorption device can be quickly started, and environmental pollution and safety accidents are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide storage, and in particular to an underground carbon dioxide storage system. Background Art

[0002] Carbon dioxide, a carbon oxide, has a chemical formula of CO2 and a chemical formula weight of 44.0095. It is a colorless and odorless gas at room temperature and pressure, and its aqueous solution has a slightly sour taste. It is also a common greenhouse gas and a component of air (accounting for 0.03%-0.04% of the total volume of the atmosphere). The boiling point of carbon dioxide is -78.5℃ (101.3kPa), the melting point is -56.6℃, the density is greater than that of air (under standard conditions), and it is soluble in water.

[0003] For compressed carbon dioxide energy storage technology with phase change, carbon dioxide will continuously cycle and transform between high-pressure liquid and normal-pressure gas during the energy storage and release process. Since carbon dioxide has a large specific volume at normal pressure and a large amount of working fluid is used, the container used to store normal-pressure gaseous carbon dioxide will be very large and require a large area of ​​land, which will not only increase land-related costs, but also directly affect the adaptability of carbon dioxide energy storage technology in areas with tight land resources. For this reason, a buried carbon dioxide storage system is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide an underground carbon dioxide storage system to solve the problem raised in the above-mentioned background technology that since the specific volume of carbon dioxide at normal pressure is very large and the amount of working fluid used is very large, the container used to store normal pressure gaseous carbon dioxide will be very large and require a large area of ​​land, which will not only increase land-related costs, but also directly affect the adaptability of carbon dioxide energy storage technology in areas with scarce land resources.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: an underground carbon dioxide storage system, comprising an underground storage container module, a gas injection module, a monitoring module, a pressure regulating module, a recycling module, an emergency treatment module, an intelligent control module and a multi-layer protection module;

[0006] The underground storage container module is used to store liquid carbon dioxide in a storage container buried deep underground;

[0007] The gas injection module is used to inject gaseous carbon dioxide into the storage container;

[0008] The monitoring module is used to monitor the pressure, temperature and gas concentration in the storage container and transmit the data;

[0009] The pressure regulating module is used to automatically adjust the pressure in the storage container according to the monitoring data;

[0010] The recycling module is used to recover the heat generated during the storage of carbon dioxide and reuse it;

[0011] The emergency processing module is used for emergency processing of sudden pressure changes and gas leakage;

[0012] The intelligent control module is used to control the gas injection module, the monitoring module, the pressure regulation module, the recycling module and the emergency treatment module, including parameter setting, data analysis and fault diagnosis;

[0013] The multi-layer protection module is used to provide protection for the storage container.

[0014] Preferably, the above-mentioned buried storage container module is respectively connected to the gas injection module, monitoring module, pressure regulation module, recycling module, emergency treatment module and multi-layer protection module, and the gas injection module, monitoring module, pressure regulation module and emergency treatment module are all connected to the intelligent control module.

[0015] Preferably, the gas injection module comprises a gas compressor, a filter and a flow controller;

[0016] The gas compressor is used to pressurize gaseous carbon dioxide into liquid carbon dioxide;

[0017] The filter is used to filter liquid carbon dioxide and remove impurities;

[0018] The flow controller is used to control the injection amount of liquid carbon dioxide during the process of injecting it into the storage container.

[0019] Preferably, the monitoring module comprises a pressure sensor, a temperature sensor and a gas concentration sensor;

[0020] The pressure sensor is used to monitor the pressure inside the storage container;

[0021] The temperature sensor is used to monitor the temperature inside the storage container;

[0022] The gas concentration sensor is used to monitor the gas concentration inside the storage container.

[0023] Preferably, the pressure regulating module comprises an expansion valve and a pressure reducing valve;

[0024] The expansion valve is used to adjust the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form;

[0025] The pressure reducing valve is used to reduce the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form.

[0026] Preferably, the emergency treatment module comprises an emergency pressure relief valve and a gas absorption device;

[0027] The emergency pressure relief valve is used to quickly release the pressure when the pressure in the storage container exceeds the safety threshold;

[0028] The gas absorption device is used to absorb the escaped carbon dioxide gas when the storage container leaks.

[0029] Preferably, the multi-layer protection module comprises an anti-seepage layer, a heat insulation layer and a reinforcement layer;

[0030] The anti-seepage layer is used to prevent the carbon dioxide gas in the storage container from leaking into the surrounding soil and groundwater, and to prevent external moisture from entering the storage container;

[0031] The heat insulation layer is used to maintain a low temperature environment in the storage container, reduce energy loss in the storage container, and isolate external heat;

[0032] The reinforcement layer is used to improve the pressure resistance and overall stability of the storage container.

[0033] Preferably, the recycling module comprises a waste heat recovery device;

[0034] The waste heat recovery device is used to convert the heat released during the storage process into electrical energy through cogeneration technology, providing clean energy support for the system.

[0035] Preferably, the above-mentioned buried storage container module includes a visual monitoring window and a storage tank;

[0036] The storage tank is used for storing liquid carbon dioxide;

[0037] The visual monitoring window is used for the staff to view the storage status of the liquid carbon dioxide inside the storage tank in real time.

[0038] Compared with the prior art, the present invention adopts the above technical scheme and has the following technical effects: the present invention significantly improves the storage efficiency and stability of carbon dioxide through the underground design and multi-layer protection module, while preventing the influence of gas leakage and temperature fluctuation on the container; the recycling module recovers the heat generated during the storage process and uses it to provide clean energy support for the equipment, reducing operating costs and improving the overall economic benefits of the system; when the emergency handling module detects an abnormal situation, it can quickly start the emergency pressure relief valve and the gas absorption device to prevent environmental pollution and safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 It is a system schematic diagram of the present invention. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0043] Example

[0044] In the prior art, since the specific volume of carbon dioxide at normal pressure is very large and the amount of working fluid used is very large, the container used to store gaseous carbon dioxide at normal pressure will be very large and require a large area of ​​land. This will not only increase land-related costs, but will also directly affect the adaptability of carbon dioxide energy storage technology in areas with tight land resources.

[0045] See also Figure 1 , the present invention provides a technical solution: an underground carbon dioxide storage system, including an underground storage container module, a gas injection module, a monitoring module, a pressure regulating module, a recycling module, an emergency treatment module, an intelligent control module and a multi-layer protection module;

[0046] A buried storage container module for storing liquid carbon dioxide in a storage container buried deep underground; the container can be made of high-strength composite materials with excellent pressure resistance and corrosion resistance;

[0047] A gas injection module, used to inject gaseous carbon dioxide into a storage container;

[0048] A monitoring module for monitoring the pressure, temperature and gas concentration in the storage container and transmitting the data;

[0049] A pressure regulating module is used to automatically adjust the pressure in the storage container according to the monitoring data, and ensure that the carbon dioxide is stably stored in liquid form by adjusting the pressure in the container;

[0050] The recycling module is used to recover the heat generated during the storage of carbon dioxide and reuse it; by driving the equipment to operate, the energy utilization rate of the system is improved;

[0051] The emergency treatment module is used to deal with sudden pressure changes and gas leakage. When an abnormal situation is detected, the intelligent control module will control the system to automatically start the emergency treatment procedure to prevent gas leakage or environmental pollution.

[0052] Intelligent control module, used to control the gas injection module, monitoring module, pressure regulation module, recycling module and emergency treatment module, including parameter setting, data analysis and fault diagnosis;

[0053] The multi-layer protection module is used to provide protection for storage containers, which can further improve the safety and stability of system operation.

[0054] The underground storage container module is respectively connected to the gas injection module, the monitoring module, the pressure regulating module, the recycling module, the emergency treatment module and the multi-layer protection module, and the gas injection module, the monitoring module, the pressure regulating module and the emergency treatment module are all connected to the intelligent control module.

[0055] The gas injection module includes a gas compressor, a filter and a flow controller. After being pressurized by the compressor, the gas enters the filter to remove impurities, and then the injection amount is accurately controlled by the flow controller to ensure the purity and stability of the injected gas.

[0056] A gas compressor, used to pressurize gaseous carbon dioxide into liquid carbon dioxide;

[0057] Filters, used to filter liquid carbon dioxide and remove impurities;

[0058] The flow controller is used to control the injection amount of liquid carbon dioxide during the injection process into the storage container.

[0059] The monitoring module includes a pressure sensor, a temperature sensor and a gas concentration sensor. During the storage of carbon dioxide, the sensor monitors the pressure, temperature and gas concentration in the container in real time and transmits the data to the intelligent control module. If an abnormal situation is found, the system will sound an alarm and start the emergency treatment procedure.

[0060] A pressure sensor for monitoring the pressure inside the storage container;

[0061] A temperature sensor for monitoring the temperature inside the storage container;

[0062] Gas concentration sensor, used to monitor the gas concentration inside the storage container.

[0063] The pressure regulating module includes an expansion valve and a pressure reducing valve; it automatically adjusts the pressure in the storage container according to the monitoring data to ensure that the carbon dioxide is stably stored in liquid form and avoid safety hazards caused by excessively high or low pressure;

[0064] An expansion valve is used to adjust the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form;

[0065] Pressure reducing valve, used to reduce the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form.

[0066] The emergency treatment module includes an emergency pressure relief valve and a gas absorption device. When an abnormal situation is detected, the emergency pressure relief valve and the gas absorption device are automatically activated to prevent environmental pollution and safety accidents.

[0067] Emergency pressure relief valve, used to quickly release pressure when the pressure in the storage container exceeds the safety threshold;

[0068] Gas absorption device, used to absorb escaping carbon dioxide gas in the event of a leak in the storage container.

[0069] The multi-layer protection module includes an anti-seepage layer, a heat-insulating layer and a reinforcement layer; the anti-seepage layer, the heat-insulating layer and the reinforcement layer can effectively prevent leakage and damage of the storage container, thereby improving the safety and service life of the system;

[0070] An impermeable layer to prevent the carbon dioxide gas in the storage container from leaking into the surrounding soil and groundwater, while preventing external moisture from entering the storage container;

[0071] The thermal insulation layer is used to maintain the low temperature environment in the storage container, reduce the energy loss of the storage container, and isolate the external heat;

[0072] A reinforcement layer used to increase the pressure resistance and overall stability of a storage container.

[0073] The recycling module includes a waste heat recovery device;

[0074] The waste heat recovery device is used to convert the heat released during the storage process into electrical energy through cogeneration technology, providing clean energy support for the system.

[0075] The underground storage container module includes a visual monitoring window and a storage tank;

[0076] Storage tanks for storing liquid carbon dioxide;

[0077] The visual monitoring window allows staff to view the storage status of liquid carbon dioxide inside the storage tank in real time.

[0078] In summary, the present invention significantly improves the storage efficiency and stability of carbon dioxide through the underground design and multi-layer protection modules, while preventing the impact of gas leakage and temperature fluctuations on the container; the recycling module recovers the heat generated during the storage process and uses it to provide clean energy support for the equipment, reducing operating costs and improving the overall economic benefits of the system; when the emergency handling module detects an abnormal situation, it can quickly start the emergency pressure relief valve and the gas absorption device to prevent environmental pollution and safety accidents.

[0079] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. An underground carbon dioxide storage system, characterized in that: It includes an underground storage container module, a gas injection module, a monitoring module, a pressure regulation module, a recycling module, an emergency treatment module, an intelligent control module and a multi-layer protection module; The underground storage container module is used to store liquid carbon dioxide in a storage container buried deep underground; The gas injection module is used to inject gaseous carbon dioxide into the storage container; The monitoring module is used to monitor the pressure, temperature and gas concentration in the storage container and transmit the data; The pressure regulating module is used to automatically adjust the pressure in the storage container according to the monitoring data; The recycling module is used to recover the heat generated during the storage of carbon dioxide and reuse it; The emergency processing module is used for emergency processing of sudden pressure changes and gas leakage; The intelligent control module is used to control the gas injection module, the monitoring module, the pressure regulation module, the recycling module and the emergency treatment module, including parameter setting, data analysis and fault diagnosis; The multi-layer protection module is used to provide protection for the storage container.

2. The underground carbon dioxide storage system according to claim 1, characterized in that: The underground storage container module is respectively connected to the gas injection module, the monitoring module, the pressure regulating module, the recycling module, the emergency processing module and the multi-layer protection module, and the gas injection module, the monitoring module, the pressure regulating module and the emergency processing module are all connected to the intelligent control module.

3. The underground carbon dioxide storage system according to claim 1, characterized in that: The gas injection module includes a gas compressor, a filter and a flow controller; The gas compressor is used to pressurize gaseous carbon dioxide into liquid carbon dioxide; The filter is used to filter liquid carbon dioxide and remove impurities; The flow controller is used to control the injection amount of liquid carbon dioxide during the process of injecting it into the storage container.

4. The underground carbon dioxide storage system according to claim 1, characterized in that: The monitoring module includes a pressure sensor, a temperature sensor and a gas concentration sensor; The pressure sensor is used to monitor the pressure inside the storage container; The temperature sensor is used to monitor the temperature inside the storage container; The gas concentration sensor is used to monitor the gas concentration inside the storage container.

5. The underground carbon dioxide storage system according to claim 1, characterized in that: The pressure regulating module includes an expansion valve and a pressure reducing valve; The expansion valve is used to adjust the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form; The pressure reducing valve is used to reduce the pressure in the storage container to ensure that the carbon dioxide is stably stored in liquid form.

6. The underground carbon dioxide storage system according to claim 1, characterized in that: The emergency treatment module includes an emergency pressure relief valve and a gas absorption device; The emergency pressure relief valve is used to quickly release the pressure when the pressure in the storage container exceeds the safety threshold; The gas absorption device is used to absorb the escaped carbon dioxide gas when the storage container leaks.

7. The underground carbon dioxide storage system according to claim 1, characterized in that: The multi-layer protection module includes an anti-seepage layer, a heat insulation layer and a reinforcement layer; The anti-seepage layer is used to prevent the carbon dioxide gas in the storage container from leaking into the surrounding soil and groundwater, and to prevent external moisture from entering the storage container; The heat insulation layer is used to maintain a low temperature environment in the storage container, reduce energy loss in the storage container, and isolate external heat; The reinforcement layer is used to improve the pressure resistance and overall stability of the storage container.

8. The underground carbon dioxide storage system according to claim 1, characterized in that: The recycling module includes a waste heat recovery device; The waste heat recovery device is used to convert the heat released during the storage process into electrical energy through cogeneration technology, providing clean energy support for the system.

9. The underground carbon dioxide storage system according to claim 1, characterized in that: The underground storage container module includes a visual monitoring window and a storage tank; The storage tank is used for storing liquid carbon dioxide; The visual monitoring window is used for the staff to view the storage status of the liquid carbon dioxide inside the storage tank in real time.

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