Waste gas separation and storage method and device, storage medium and electronic device

Abstract

The invention discloses a waste gas separation and storage method and device, a storage medium, an electronic device and a computer program product. The method comprises the steps that the position of an underground salt water layer of a target area is determined; introducing waste gas to be treated into the underground salt water layer, and adjusting the pressure and temperature of the waste gas to separate the waste gas to obtain carbon dioxide and nitrogen; injecting carbon dioxide into the underground salt water layer for sealing; and nitrogen is compressed and then injected into the underground salt water layer for storage. The natural characteristics of the underground salt water layer, namely the porous medium molecular sieve effect, are directly utilized, carbon dioxide in waste gas is effectively separated and sealed, meanwhile, nitrogen is stored, the influence of carbon dioxide emission on the environment is avoided, and nitrogen storage and recycling are facilitated.

Description

Technical Field

[0001] The present application relates to the field of waste gas treatment, and in particular, to a method and device for separating and storing waste gas, a storage medium, an electronic device, and a computer program product. Background Art

[0002] With the acceleration of the global industrialization process, the emissions of industrial waste gas in China have also been continuously increasing. These industrial waste gases, such as carbon monoxide, sulfur dioxide, nitrogen dioxide, etc., cause great damage to human health, the growth of animals and plants, soil, water quality, and the atmospheric environment.

[0003] In the related art, methods such as chemical absorption, physical adsorption, and membrane separation are mainly adopted to treat waste gas.

[0004] However, the methods in the related art require large and complex equipment, and the operation cost is high, including the regeneration of chemical absorbents, the replacement of physical adsorption materials, and the maintenance of membrane components. In addition, the compression, storage, and transportation of the gas after surface capture also consume a large amount of energy, increasing the total treatment cost. Therefore, there are problems such as high technical difficulty, low efficiency, and high cost, and secondary pollution is easily caused during the treatment process. Therefore, there is an urgent need for an economically efficient and environmentally friendly industrial waste gas treatment technology. Summary of the Invention

[0005] The embodiments of the present application provide a method and device for separating and storing waste gas, a storage medium, an electronic device, and a computer program product.

[0006] According to one aspect of the embodiments of the present application, a method for separating and storing waste gas is provided, including: determining the position of the underground brine layer in the target area; introducing the waste gas to be treated into the underground brine layer, and adjusting the pressure and temperature of the waste gas to separate the waste gas to obtain carbon dioxide and nitrogen; injecting the carbon dioxide into the underground brine layer for storage; and compressing the nitrogen and injecting it into the underground brine layer for storage.

[0007] In an exemplary embodiment, the waste gas to be processed is introduced into an underground brine formation, and the pressure and temperature of the waste gas are adjusted to separate the waste gas, obtaining carbon dioxide and nitrogen, including: acquiring characteristic data of the carbon dioxide and nitrogen; establishing a gas adsorption model based on the characteristic data of the carbon dioxide and nitrogen, wherein the gas adsorption model is used to indicate the solubility of the carbon dioxide and nitrogen in a liquid; acquiring geological parameters of the underground brine formation in the target area; determining the adsorption capacity of the underground brine formation according to the geological parameters; determining a target pressure according to the gas adsorption model and the adsorption capacity of the underground brine formation; adjusting the pressure of the waste gas to the target pressure to increase the solubility of the waste gas in the underground brine formation; determining a target temperature according to the characteristic data of the carbon dioxide and the geological parameters; adjusting the temperature of the waste gas to the target temperature to increase the rate at which the underground brine formation adsorbs the carbon dioxide, so as to separate the carbon dioxide and the nitrogen.

[0008] In an exemplary embodiment, injecting carbon dioxide into an underground brine formation for storage includes: injecting carbon dioxide into the underground brine formation with preset injection parameters, wherein the injection parameters include injection rate, injection pressure, and injection temperature; monitoring the carbon dioxide concentration in the underground brine formation and adjusting the injection parameters according to the carbon dioxide concentration to store the carbon dioxide in the underground brine formation.

[0009] In an exemplary embodiment, compressing nitrogen and then injecting it into an underground brine formation for storage includes: collecting the separated nitrogen; filtering and drying the nitrogen; performing multi-stage compression on the nitrogen; injecting the compressed nitrogen into a nitrogen storage area in the underground brine formation for storage.

[0010] In an exemplary embodiment, the method further includes: releasing the stored nitrogen, transporting it through a pipeline to a power generation device to drive the power generation device to generate electricity; or extracting the stored nitrogen, purifying the nitrogen, and using it as an inert gas.

[0011] In an exemplary embodiment, introducing the waste gas to be processed into an underground brine formation includes: establishing an injection well communicating with the underground brine formation; injecting the pretreated waste gas into the underground brine formation through the injection well.

[0012] Another aspect of the present application provides a device for separating and storing waste gas, the device including: a position determination module for determining the position of an underground brine formation in a target area; a separation module for introducing the waste gas to be processed into the underground brine formation and adjusting the pressure and temperature of the waste gas to separate the waste gas, obtaining carbon dioxide and nitrogen; a storage module for injecting the carbon dioxide into the underground brine formation for storage; a storage module for compressing nitrogen and then injecting it into the underground brine formation for storage.

[0013] According to another aspect of the embodiments of the present application, there is also provided a computer-readable storage medium storing a computer program, wherein the computer program is configured to execute the above-mentioned method for separating and storing waste gas when running.

[0014] According to another aspect of the embodiments of the present application, there is also provided an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the above-mentioned processor executes the above-mentioned method for separating and storing waste gas through the computer program.

[0015] According to another aspect of the embodiments of the present application, there is also provided a computer program product including a computer program, and the steps of the methods described in the various embodiments of the present application are implemented when the computer program is executed by a processor.

[0016] The above-mentioned method for separating and storing waste gas effectively separates and stores carbon dioxide in the waste gas by directly utilizing the natural characteristics of the underground brine layer, i.e., the molecular sieve effect of porous media, while storing nitrogen. It not only solves the environmental impact of carbon dioxide emissions but also facilitates the storage and reuse of nitrogen. It not only significantly improves the efficiency of carbon dioxide storage and nitrogen separation, reduces the equipment cost and energy consumption required by traditional ground treatment technologies, but also creates a precedent for underground compression energy storage of nitrogen. By adjusting the pressure and temperature, the separation process becomes more efficient, and the storage and storage processes become safer and more controllable. It realizes the dual benefits of waste gas treatment and energy storage, has significant environmental and economic benefits, and provides an innovative solution for the field of industrial waste gas management and sustainable energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a hardware structure block diagram of the method for separating and storing waste gas according to the embodiments of the present application;

[0020] Figure 2 is a flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0021] Figure 3It is the second flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0022] Figure 4 It is the third flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0023] Figure 5 It is the fourth flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0024] Figure 6 It is the fifth flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0025] Figure 7 It is the sixth flowchart of a method for separating and storing waste gas according to an embodiment of the present application;

[0026] Figure 8 It is the structural block diagram of a waste gas separation and storage device according to an embodiment of the present application. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily need to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0029] The method embodiments provided in the embodiments of the present application can be executed on a computer terminal or a similar computing device. Taking running on a computer terminal as an example, Figure 1 It is the hardware structural block diagram of the computer terminal of the waste gas separation and storage method according to the embodiment of the present application. As Figure 1 shown, the computer terminal may include one or more (Figure 1 Only one processor 102 is shown (the processor 102 may include, but is not limited to, a microprocessor (MPU) or a programmable logic device (PLD)), and a memory 104 for storing data. In one exemplary embodiment, the computer terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those of ordinary skill in the art can understand that Figure 1 The structure shown is only schematic and does not limit the structure of the computer terminal. For example, the computer terminal may further include Figure 1 more or fewer components than those shown, or have different configurations with the same functions as those shown or more functions than those shown. Figure 1 shown or more different configurations with functions more than those shown. Figure 1 shown.

[0030] The memory 104 can be used to store computer programs. For example, software programs and modules of application software, such as the computer program corresponding to the method for separating and storing waste gas in the embodiments of the present application. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the above method. The memory 104 may include a high-speed random access memory and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memories. In some instances, the memory 104 may further include a memory remotely provided with respect to the processor 102, and these remote memories can be connected to the computer terminal through a network. Examples of the above network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and combinations thereof.

[0031] The transmission device 106 is used to receive or send data via a network. Specific examples of the above network may include a wireless network provided by a communication provider of the computer terminal. In one instance, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices through a base station and thus can communicate with the Internet. In one instance, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0032] In this embodiment, a method for separating and storing waste gas is provided. Figure 2 is a flowchart of an optional method for separating and storing waste gas according to the embodiments of the present application. The process includes the following steps S200 - S220:

[0033] Step S200: Determine the location of the underground brine layer in the target area.

[0034] Specifically, to find a suitable underground brine layer as a site for carbon dioxide sequestration and nitrogen energy storage, geological surveys and explorations are required to ensure that the brine layer has sufficient porosity and permeability, as well as a stable geological structure, capable of safely and effectively sequestering carbon dioxide and storing compressed nitrogen.

[0035] Exemplarily, geophysical exploration techniques, such as seismic exploration and electromagnetic measurement, are used to analyze the underground structure of the target area and identify the presence and depth of the brine layer. Through drilling and sampling, the physical and chemical properties of the brine layer are analyzed, including the salinity, porosity, permeability of the water, and rock type, to evaluate its suitability as a sequestration and energy storage site. A geological stability analysis is carried out on the target brine layer to ensure that its structure can withstand the storage of high-pressure gas without leakage or geological disasters.

[0036] Step S210: Inject the waste gas to be treated into the underground brine layer and adjust the pressure and temperature of the waste gas to separate it, obtaining carbon dioxide and nitrogen.

[0037] Specifically, by directly injecting industrial waste gas into the underground brine layer and utilizing the porous medium characteristics of the brine layer, the self-separation of carbon dioxide and nitrogen is achieved by adjusting the pressure and temperature.

[0038] Exemplarily, an exhaust gas injection well connected to the brine layer is constructed to ensure the safe injection of the exhaust gas under high pressure. The injection conditions of the injection well, such as injection pressure and temperature, are optimized to promote the dissolution and adsorption of carbon dioxide in the brine while keeping nitrogen in the gas phase. Real-time monitoring is implemented to adjust the pressure and temperature of the brine layer to maintain the best separation efficiency.

[0039] Step S220: Inject the carbon dioxide into the underground brine layer for sequestration.

[0040] Specifically, the separated carbon dioxide is injected into the brine layer, and long-term and safe sequestration is achieved by utilizing its natural porous structure and the dissolution of the brine.

[0041] Exemplarily, a dedicated carbon dioxide injection system is designed to inject the separated carbon dioxide through the underground wellhead. Monitor the injection volume and speed of carbon dioxide to ensure the capacity and stability of the brine layer. Implement long-term monitoring of the sequestration effect, including the sequestration efficiency of carbon dioxide and the geological safety assessment of the brine layer.

[0042] Step S230: Compress the nitrogen and inject it into the underground brine layer for storage.

[0043] Specifically, the separated nitrogen is compressed to increase its density and storage efficiency, and then stored in an underground saline aquifer as a potential energy or industrial gas resource.

[0044] Exemplarily, a nitrogen compression system is established, including multi-stage compression to increase the pressure and cooling equipment to control the temperature during the compression process. A nitrogen underground storage module is designed to ensure that the compressed nitrogen can be safely stored in the saline aquifer, while monitoring the pressure change to ensure stable storage. When needed, the release and energy recovery of nitrogen are implemented, such as driving a turbine or a generator to generate electricity.

[0045] In this embodiment, by directly utilizing the natural characteristics of the underground saline aquifer, namely the molecular sieve effect of porous media, carbon dioxide in the waste gas is effectively separated and sealed, while nitrogen is stored. This not only solves the environmental impact of carbon dioxide emissions, but also facilitates the storage and reuse of nitrogen. It not only significantly improves the efficiency of carbon dioxide sequestration and nitrogen separation, reduces the equipment cost and energy consumption required by traditional ground treatment technologies, but also creates a precedent for underground compression energy storage of nitrogen. By adjusting the pressure and temperature, the separation process is made more efficient, and the sequestration and storage processes are made safer and more controllable. The dual benefits of waste gas treatment and energy storage are achieved, with significant environmental and economic benefits, providing an innovative solution for the field of industrial waste gas management and energy sustainable utilization.

[0046] In one embodiment, as Figure 3 shown, in step S210, the waste gas to be treated is introduced into the underground saline aquifer, and the pressure and temperature of the waste gas are adjusted to separate the waste gas, obtaining carbon dioxide and nitrogen. It includes steps S300 - S370:

[0047] Step S300, obtain the characteristic data of carbon dioxide and nitrogen.

[0048] Specifically, before separating and sequestering carbon dioxide and nitrogen, it is necessary to understand the physical and chemical characteristics such as solubility, adsorption capacity, and diffusion properties of the two gases under specific conditions to guide subsequent operations.

[0049] Exemplarily, consult or experimentally determine the solubility of carbon dioxide and nitrogen under different temperature and pressure conditions to understand their dissolution behavior in saline water. Analyze the adsorption characteristics of carbon dioxide and nitrogen, including adsorption kinetics and adsorption thermodynamics, to predict the adsorption capacity of the saline aquifer rock for these two gases. Examine the diffusion characteristics of carbon dioxide and nitrogen to determine the diffusion rate in the porous media of the saline aquifer, providing a basis for pressure and temperature adjustment.

[0050] Step S310, based on the characteristic data of carbon dioxide and nitrogen, establish a gas adsorption model.

[0051] Among them, the gas adsorption model is used to indicate the solubility of carbon dioxide and nitrogen in the liquid.

[0052] Specifically, based on the obtained gas characteristic data, a model is established that can predict the solubility and adsorption behavior of carbon dioxide and nitrogen in the liquid.

[0053] Exemplarily, using the Langmuir or Freundlich adsorption isotherm equation, an adsorption model of carbon dioxide and nitrogen is established, considering temperature, pressure, and geological body characteristics. A gas solubility prediction model is developed, combining Henry's law and the Van't Hoff equation, to predict the solubility of carbon dioxide under different conditions. Integrate the above models to establish a gas adsorption and dissolution prediction system that comprehensively considers gas characteristics and geological conditions.

[0054] Step S320, obtain the geological parameters of the underground saline aquifer in the target area.

[0055] Specifically, understanding the structure, composition, and physical properties of the underground saline aquifer is the key to evaluating its suitability as a site for carbon dioxide sequestration and nitrogen separation.

[0056] Exemplarily, geological exploration, such as core sampling, seismic wave exploration, etc., is used to obtain data such as the porosity, permeability, and temperature distribution of the saline aquifer. Groundwater analysis is carried out to determine the chemical composition and temperature of the water in the saline aquifer and evaluate its impact on carbon dioxide adsorption. High-precision mapping is used to establish a three-dimensional geological model of the underground saline aquifer to accurately predict the migration paths and sequestration areas of carbon dioxide and nitrogen.

[0057] Step S330, determine the adsorption capacity of the underground saline aquifer according to the geological parameters.

[0058] Specifically, evaluating the adsorption capacity of the saline aquifer for carbon dioxide and the retention efficiency of nitrogen is a prerequisite for optimizing the sequestration strategy.

[0059] Exemplarily, using the porous medium theory, calculate the pore energy and adsorption capacity of the rocks in the saline aquifer. Considering the chemical environment of the underground saline water, evaluate its promoting or inhibiting effect on carbon dioxide adsorption. Estimate the geological stability during the sequestration process to ensure the safety of sequestration.

[0060] Step S340, determine the target pressure according to the gas adsorption model and the adsorption capacity of the underground saline aquifer.

[0061] Specifically, based on the gas adsorption model and the adsorption capacity of the saline aquifer, determine a target pressure to maximize the solubility of carbon dioxide in the saline aquifer while keeping nitrogen in a gaseous state.

[0062] Exemplarily, through model prediction, the optimal pressure point between the carbon dioxide solubility and the nitrogen retention rate is found. Through on-site small-scale storage tests, the feasibility of the pressure value predicted by the model is verified. Considering the geological pressure changes, ensure that the implementation of the target pressure will not affect the stability of the underground structure.

[0063] Step S350: Adjust the pressure of the waste gas to the target pressure to increase the solubility of the waste gas in the underground brine formation.

[0064] Among them, the solubilities of carbon dioxide and nitrogen in the underground brine formation are different.

[0065] Specifically, by controlling the high-pressure pump at the injection wellhead, adjust the pressure of the waste gas to the target value to promote the storage of carbon dioxide.

[0066] Exemplarily, set the operating parameters of the high-pressure pump to ensure that the waste gas can be injected at the target pressure. Implement real-time pressure monitoring. Through the sensor network, monitor the pressure changes at the wellhead and in the brine formation, and adjust the working state of the high-pressure pump in a timely manner. Equip with overpressure protection and emergency shutdown systems to ensure the safety of the storage process.

[0067] Specifically, carbon dioxide is easily soluble in water under high pressure, while the solubility of nitrogen is relatively low. By increasing the pressure of the waste gas, the solubility of carbon dioxide in the brine can be significantly increased, while nitrogen remains in the gas phase, thus achieving preliminary separation.

[0068] Exemplarily, use the high-pressure pump to increase the pressure of the waste gas to a predetermined value to ensure an increase in the solubility of carbon dioxide. Design a high-pressure gas injection system to precisely control the pressure of the waste gas injected into the underground brine formation to achieve the best dissolution effect. Real-time monitor the pressure of the underground brine formation to adjust the injection rate of the waste gas to prevent damage to the geological structure.

[0069] Step S360: Determine the target temperature according to the characteristic data of carbon dioxide and the geological parameters.

[0070] Specifically, according to the characteristic data of carbon dioxide and the geological parameters of the brine formation, find a temperature point to increase the adsorption rate of carbon dioxide and achieve separation from nitrogen.

[0071] Exemplarily, predict the adsorption rate of carbon dioxide at different temperatures through a gas adsorption model to find the optimal temperature point. Consider the underground temperature distribution, evaluate the feasibility of the target temperature and its impact on the stability of the brine formation. Experimentally verify the carbon dioxide adsorption efficiency and nitrogen retention at the target temperature.

[0072] Step S370: Adjust the temperature of the waste gas to the target temperature to increase the rate of carbon dioxide adsorption in the underground brine formation to separate carbon dioxide and nitrogen.

[0073] Specifically, the temperature drop can enhance the adsorption of carbon dioxide on the surface of brine formation rocks and accelerate its separation rate. By reducing the temperature, carbon dioxide can be further separated from the mixed gas while maintaining high pressure, and nitrogen remains in the gaseous state.

[0074] Exemplarily, a heat exchanger or a cooling system is used to cool the waste gas, reducing the gaseous activity of carbon dioxide and increasing its adsorption rate. The temperature of the underground brine formation is precisely controlled to ensure that it is maintained within a range favorable for carbon dioxide adsorption while avoiding the condensation of nitrogen. Implement temperature-pressure linkage control and optimize the separation conditions based on the characteristic data of carbon dioxide and nitrogen.

[0075] Specifically, the waste gas is adjusted to the target temperature through a waste gas cooling or heating system to optimize the underground storage effect.

[0076] Exemplarily, a waste gas temperature regulation system, such as a heat exchanger or a cryogenic cooling device, is designed to ensure that the waste gas can be injected into the underground brine formation at the target temperature. Temperature monitoring is implemented, and high-precision temperature sensors are used to monitor the changes in the waste gas temperature and the underground temperature in real time. Evaluate the impact of temperature adjustment on the waste gas injection rate to ensure the sustainability and safety of the storage process.

[0077] In this embodiment, by precisely controlling the pressure and temperature of the waste gas in the underground brine formation and utilizing the different solubility and adsorption characteristics of carbon dioxide and nitrogen in the porous medium, the effective separation and storage of carbon dioxide in the mixed waste gas are achieved, while nitrogen is retained and used as an energy storage medium. By obtaining the characteristic data of carbon dioxide and nitrogen and combining the geological parameters of the underground brine formation in the target area, a gas adsorption and dissolution model is established and optimized, realizing the precise adjustment of the waste gas pressure and temperature parameters based on the model. This not only improves the storage efficiency of carbon dioxide in the underground brine formation but also promotes the separation and potential energy storage utilization of nitrogen, overall enhancing the environmental and economic benefits of industrial waste gas treatment and providing an innovative solution for greenhouse gas reduction and clean energy storage. Through precise control and real-time monitoring, the present invention also ensures the safety and controllability of the storage process, demonstrating its potential and reliability in industrial applications.

[0078] In one embodiment, as Figure 4 shown, in step S220, carbon dioxide is injected into the underground brine formation for storage. It includes steps S400 - S410:

[0079] In step S400, carbon dioxide is injected into the underground brine formation with preset injection parameters.

[0080] Among them, the injection parameters include injection rate, injection pressure, and injection temperature.

[0081] Specifically, the injection parameters of carbon dioxide, such as rate, pressure, and temperature, are the basis for ensuring its effective and safe storage in saline aquifers.

[0082] Exemplarily, a carbon dioxide injection system is designed, including equipment such as injection wells, high-pressure pumps, heat exchangers, and flow control valves. According to geological conditions and carbon dioxide characteristic data, injection parameters such as initial injection pressure, injection temperature, and injection rate are preset. Automatic control is implemented to ensure that carbon dioxide is stably injected into the underground saline aquifer according to the preset parameters, while recording data during the injection process.

[0083] Step S410, monitor the carbon dioxide concentration in the underground saline aquifer, and adjust the injection parameters according to the carbon dioxide concentration to store carbon dioxide in the underground saline aquifer.

[0084] Specifically, based on the monitoring results of carbon dioxide concentration, dynamically adjust the injection parameters to ensure the continuous high efficiency of carbon dioxide storage and the stability of the geological environment.

[0085] Exemplarily, establish an underground saline aquifer monitoring network, including gas sensors and water quality detection equipment installed at different depths. Implement regular and continuous monitoring, collect data on the concentration distribution of carbon dioxide in the saline aquifer. Analyze the monitoring data, evaluate the storage efficiency and geological safety, and provide a basis for parameter adjustment. Adjust the injection pressure and rate according to the change in carbon dioxide concentration to maintain the optimal storage state. Use temperature control strategies to timely adjust the injection temperature to enhance the solubility and adsorption stability of carbon dioxide in salt water. Implement geological stability assessment to ensure that the adjusted injection parameters will not cause geological structure damage or carbon dioxide leakage risk.

[0086] In this embodiment, by precisely controlling the injection parameters (rate, pressure, temperature) of carbon dioxide and real-time monitoring the carbon dioxide concentration in the underground saline aquifer, a dynamically optimized storage strategy is achieved. This technical solution can effectively improve the efficiency and safety of carbon dioxide storage, reduce greenhouse gas emissions, and at the same time reduce the storage cost.

[0087] In one embodiment, as Figure 5 shown, step S230, compress nitrogen and inject it into the underground saline aquifer for storage. It includes: steps S500 - S530:

[0088] Step S500, collect the separated nitrogen.

[0089] Specifically, during the separation process of carbon dioxide and nitrogen, nitrogen is separated as the gas phase and needs to be concentrated through an appropriate collection system.

[0090] Exemplarily, a gas collection device is designed and located after the separation module to capture and guide the separated nitrogen. Ensure the airtightness during the collection process to avoid nitrogen leakage, and at the same time monitor the gas flow rate and composition to ensure the collection of high-purity nitrogen.

[0091] Step S510, filter and dry the nitrogen.

[0092] Specifically, filtering and drying the nitrogen is to prepare for subsequent compression and storage, which can remove impurities and moisture in the gas and improve the purity and stability of nitrogen.

[0093] Exemplarily, use a filter system including particulate filters and molecular sieves to remove solid particles and organic matter in nitrogen. Implement the drying process, using dehydrating agents such as desiccants or removing moisture in nitrogen through heating and cooling cycles to ensure its dryness. Monitor the filtering and drying processes to ensure that the purity and moisture content of nitrogen meet the requirements of compression and storage.

[0094] Step S520, perform multi-stage compression on the nitrogen.

[0095] Specifically, multi-stage compression can increase the density of nitrogen, reduce the energy consumption during compression, and create favorable conditions for underground storage.

[0096] Exemplarily, design a multi-stage compression system including multiple compressor stages. After each stage of compression, the gas passes through a cooler to reduce the temperature and reduce the compression heat. Implement fine control of pressure and temperature to ensure that nitrogen enters the next stage stably and safely after each stage of compression. Dynamically monitor the compression process, including compression ratio, energy consumption, and gas leakage, to optimize the compression efficiency and ensure the high quality of nitrogen.

[0097] Step S530, inject the compressed nitrogen into the nitrogen storage area in the underground saline aquifer for storage.

[0098] Specifically, the compressed nitrogen is injected into the underground saline aquifer in a high-pressure state, and its storage space is used for long-term and stable storage.

[0099] Exemplarily, design special high-pressure gas injection wells and pipelines to ensure that the compressed nitrogen can be safely injected underground. Implement geological structure analysis and stability assessment of the underground saline aquifer to determine suitable nitrogen storage locations and parameters. Monitor the pressure and temperature in the underground storage area to ensure the stability and safety during nitrogen storage, and at the same time prepare for possible energy release in the future.

[0100] In this embodiment, the nitrogen gas separated through collection, filtration, and drying is injected into the underground brine formation for storage after multi-stage compression, thus creating an innovative collaborative technology for industrial waste gas treatment and nitrogen energy storage. The key effects of this technical solution include: High-quality recovery and utilization of nitrogen gas: Through filtration and drying processes, the purity of nitrogen gas is ensured, laying a foundation for subsequent compression and energy storage, and enhancing the utilization value of nitrogen gas. Efficient application of multi-stage compression technology: Multi-stage compression not only increases the density of nitrogen gas but also reduces the energy consumption during the compression process, improving the economy and efficiency of energy storage. Comprehensive development of the underground brine formation: Using the underground brine formation as a storage medium for nitrogen gas not only saves the construction cost of surface facilities but also makes full use of underground space resources, achieving an organic combination of industrial waste gas treatment and energy storage.

[0101] In one embodiment, as Figure 6 shown, the method further includes: Steps S600 - S610:

[0102] Step S600, release the stored nitrogen gas, and transport it through a pipeline to a power generation device to drive the power generation device to generate electricity.

[0103] Specifically, when the nitrogen gas stored under high pressure is released, the potential energy stored in it can be converted into kinetic energy, which in turn drives the power generation device to generate electrical energy. The power generation device driven by nitrogen gas can be a cycle system based on thermodynamic principles, such as the Brayton Cycle, or a system that directly converts the kinetic energy released by nitrogen gas into electrical energy.

[0104] Exemplarily, design a nitrogen gas release system, including valve control and pressure regulation devices in the underground storage area, to ensure that the nitrogen gas can be released in a controlled manner. Establish a high-pressure gas transmission pipeline to transport the released nitrogen gas to a power generation device, such as a turbine or a generator, and use the nitrogen gas flow to drive the device to operate. Implement monitoring and optimization of the energy conversion efficiency to ensure the high efficiency of the nitrogen gas release and power generation processes. Select appropriate power generation devices, such as nitrogen gas turbines or generators, to ensure that they can efficiently convert the kinetic energy of nitrogen gas into electrical energy. Implement monitoring and adjustment of the power output to ensure stable power quality and meet the requirements for grid connection or direct use. Develop an energy management and scheduling system to integrate the power generation device with the grid or local power demand and achieve optimal allocation of energy.

[0105] Or, Step S610, extract the stored nitrogen gas, and after purifying the nitrogen gas, use it as an inert gas.

[0106] Specifically, the nitrogen gas after purification treatment has high purity and inertness, and is suitable for a variety of industrial applications, such as food preservation, medical equipment, electronic manufacturing, etc.

[0107] Exemplarily, a nitrogen extraction system is designed, including gas extraction equipment and pipelines in the underground storage area, to ensure the stable extraction of nitrogen. Implement in-depth purification treatment of nitrogen, including removing possible impurities, moisture, and oil content, to meet the requirements of nitrogen purity for different industrial applications. Develop a nitrogen distribution network to transport the purified nitrogen to various demand points, such as factories, hospitals, or laboratories, to ensure its safe and efficient utilization.

[0108] In this embodiment, the process of releasing high-pressure nitrogen and generating electricity effectively converts the stored mechanical energy into electrical energy, realizing the secondary utilization of energy, reducing energy waste, and improving the overall energy utilization efficiency. The highly purified nitrogen after purification treatment can be widely applied in the industrial field, providing protection as an inert gas during the production process, reducing the demand for expensive inert gases in industrial production, saving costs, and having environmental benefits at the same time. Through innovative nitrogen recovery and utilization technologies, the present invention not only improves the economic benefits of waste treatment but also promotes the sustainable utilization of energy, achieving multiple benefits in the environment, economy, and society.

[0109] In one embodiment, as Figure 7 shown, step S210, introducing the waste gas to be treated into the underground saline aquifer, includes: steps S700 - S710:

[0110] Step S700, establishing an injection well connected to the underground saline aquifer.

[0111] Specifically, the injection well is a key passage connecting the ground and the underground saline aquifer, and its design and construction need to comprehensively consider geological conditions, waste gas characteristics, as well as safety and environmental protection requirements.

[0112] Exemplarily, geological exploration and site selection: Using geophysical exploration and geological drilling technologies, conduct a detailed geological exploration of the target area to determine the specific location, depth, and capacity of the underground saline aquifer. Design the injection well structure: According to the geological parameters of the underground saline aquifer, design the structure of the injection well, including the wellbore diameter, depth, liner material, and sealing technology, to ensure that the waste gas can be efficiently and safely injected underground. Construction and safety measures: Adopt advanced drilling technologies and equipment for the construction of the injection well, and at the same time set up a monitoring system and an emergency shutdown device to deal with possible geological anomalies or leakage risks.

[0113] Step S710, injecting the pretreated waste gas into the underground saline aquifer through the injection well.

[0114] Specifically, the pretreatment includes removing harmful substances in the waste gas and adjusting its physical and chemical properties to adapt to the storage conditions of the underground saline aquifer.

[0115] Exemplarily, waste gas pretreatment: Remove particulate matter, harmful gases, and moisture in the waste gas through steps such as filtration, washing, and drying, and adjust the composition and humidity of the waste gas to make it suitable for underground storage. Adjust waste gas parameters: According to the physical and chemical properties of the underground saline aquifer, adjust the pressure, temperature, and flow rate of the waste gas to promote the dissolution and adsorption of carbon dioxide while keeping nitrogen in a gaseous state. Injection operation and monitoring: Inject the pretreated waste gas into the underground saline aquifer through an injection well, and implement real-time monitoring of the injection flow rate and pressure to ensure the injection efficiency and safety of the waste gas.

[0116] In this embodiment, the pretreated waste gas is injected into the underground saline aquifer at an appropriate pressure and temperature, which can effectively promote the separation and storage of carbon dioxide. At the same time, it creates conditions for the energy storage of nitrogen, improving the overall efficiency and environmental protection effect of waste gas treatment. Through the construction of injection wells, the underground saline aquifer not only becomes a storage site for carbon dioxide but also an energy storage warehouse for nitrogen, opening up a new way for the comprehensive utilization of industrial waste gas. The precise design and construction of injection wells, as well as the strict monitoring of the waste gas pretreatment and injection processes, ensure the safety of waste gas storage and reduce the potential impact on underground water resources and the ecological environment. Compared with traditional waste gas treatment technologies, the technical solution of the present invention reduces the construction and operation costs of ground equipment. At the same time, through the dual benefits of carbon dioxide storage and nitrogen energy storage, it brings significant economic benefits to industrial waste gas treatment.

[0117] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disc) and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of various embodiments of the present application.

[0118] In this embodiment, a waste gas separation and storage device is also provided. This waste gas separation and storage device is used to implement the above embodiments and preferred implementation manners, and those that have been described will not be repeated. As used hereinafter, the term "module" can be a combination of software and / or hardware that can achieve a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware is also possible and contemplated.

[0119] Figure 8 is a structural block diagram of an optional waste gas separation and storage device according to an embodiment of the present application. As Figure 8 shown, it includes:

[0120] A location determination module 801 for determining the location of the underground brine layer in the target area.

[0121] A separation module 802 for introducing the waste gas to be treated into the underground brine layer and adjusting the pressure and temperature of the waste gas to separate the waste gas, obtaining carbon dioxide and nitrogen.

[0122] A storage module 803 for injecting carbon dioxide into the underground brine layer for storage.

[0123] A storage module 804 for compressing nitrogen and injecting it into the underground brine layer for storage.

[0124] Through the above device, directly utilizing the natural characteristics of the underground brine layer, namely the molecular sieve effect of the porous medium, effectively separates and stores carbon dioxide in the waste gas, and stores nitrogen at the same time. It not only solves the environmental impact of carbon dioxide emissions, but also facilitates the storage and reuse of nitrogen. It not only significantly improves the efficiency of carbon dioxide storage and nitrogen separation, reduces the equipment cost and energy consumption required by traditional ground treatment technologies, but also creates a precedent for underground compression energy storage of nitrogen. By adjusting the pressure and temperature, the separation process is made more efficient, and the storage and storage processes are made safer and more controllable. The dual benefits of waste gas treatment and energy storage are achieved, with significant environmental and economic benefits, providing an innovative solution for the field of industrial waste gas management and energy sustainable utilization.

[0125] In an exemplary embodiment, the above separation module 802 is further configured to: obtain characteristic data of carbon dioxide and nitrogen; establish a gas adsorption model based on the characteristic data of carbon dioxide and nitrogen, where the gas adsorption model is used to indicate the solubility of carbon dioxide and nitrogen in the liquid; obtain geological parameters of the underground brine layer in the target area; determine the adsorption capacity of the underground brine layer according to the geological parameters; determine the target pressure according to the gas adsorption model and the adsorption capacity of the underground brine layer; adjust the pressure of the waste gas to the target pressure to increase the solubility of the waste gas in the underground brine layer; determine the target temperature according to the characteristic data of carbon dioxide and the geological parameters; adjust the temperature of the waste gas to the target temperature to increase the speed of the underground brine layer adsorbing carbon dioxide, so as to separate carbon dioxide and nitrogen.

[0126] In an exemplary embodiment, the above storage module 803 is further configured to: inject carbon dioxide into the underground brine layer with preset injection parameters, where the injection parameters include injection rate, injection pressure, and injection temperature. Monitor the carbon dioxide concentration in the underground brine layer and adjust the injection parameters according to the carbon dioxide concentration to store carbon dioxide in the underground brine layer.

[0127] In an exemplary embodiment, the above storage module 804 is further configured to: collect the separated nitrogen gas; filter and dry the nitrogen gas; compress the nitrogen gas in multiple stages; and inject the compressed nitrogen gas into a nitrogen storage area in an underground brine formation for storage.

[0128] In an exemplary embodiment, the above device further includes:

[0129] A power generation module, configured to release the stored nitrogen gas, transport it through a pipeline to a power generation device, and drive the power generation device to generate electricity.

[0130] A purification module, configured to extract the stored nitrogen gas, purify the nitrogen gas, and use it as an inert gas.

[0131] In an exemplary embodiment, the above separation module 802 is further configured to: establish an injection well communicating with the underground brine formation; and inject the pretreated waste gas into the underground brine formation through the injection well.

[0132] An embodiment of the present application further provides a storage medium, which includes a stored program. When the above program runs, it executes the method of any one of the above.

[0133] Optionally, in this embodiment, the above storage medium may be set to store program code for executing the following steps:

[0134] S1, determine the location of the underground brine formation in the target area.

[0135] S2, introduce the waste gas to be processed into the underground brine formation, and adjust the pressure and temperature of the waste gas to separate the waste gas, obtaining carbon dioxide and nitrogen gas.

[0136] S3, inject the carbon dioxide into the underground brine formation for storage.

[0137] S4, compress the nitrogen gas and inject it into the underground brine formation for storage.

[0138] An embodiment of the present application further provides an electronic device, including a memory and a processor. A computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0139] Optionally, the above electronic device may further include a transmission device and an input / output device. The transmission device is connected to the above processor, and the input / output device is connected to the above processor.

[0140] Optionally, in this embodiment, the above processor may be configured to execute the following steps through a computer program:

[0141] S1, determine the location of the underground brine formation in the target area.

[0142] S2. Introduce the waste gas to be processed into the underground saline aquifer, and adjust the pressure and temperature of the waste gas to separate it, obtaining carbon dioxide and nitrogen.

[0143] S3. Inject the carbon dioxide into the underground saline aquifer for storage.

[0144] S4. Compress the nitrogen and then inject it into the underground saline aquifer for storage.

[0145] Optionally, in this embodiment, the above storage medium may include, but is not limited to: various media that can store program codes such as USB flash drives, read-only memories (abbreviated as ROM), random access memories (abbreviated as RAM), external hard drives, magnetic disks, or optical discs.

[0146] The embodiment of the present application also provides a computer program product, including a non-volatile computer-readable storage medium. The non-volatile computer-readable storage medium stores the computer program product. When the computer program is executed by a processor, the steps of the methods in various embodiments of the present application are implemented.

[0147] Optionally, in this embodiment, the above computer program may be set to implement the following steps when executed by a processor:

[0148] S1. Determine the location of the underground saline aquifer in the target area.

[0149] S2. Introduce the waste gas to be processed into the underground saline aquifer, and adjust the pressure and temperature of the waste gas to separate it, obtaining carbon dioxide and nitrogen.

[0150] S3. Inject the carbon dioxide into the underground saline aquifer for storage.

[0151] S4. Compress the nitrogen and then inject it into the underground saline aquifer for storage.

[0152] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and will not be elaborated herein.

[0153] Obviously, those skilled in the art should understand that the various modules or steps of the present application described above can be implemented by a general-purpose computing device. They can be concentrated on a single computing device or distributed on a network composed of multiple computing devices. Optionally, they can be implemented by program codes executable by the computing device. Thus, they can be stored in a storage device and executed by the computing device. And in some cases, the steps shown or described can be executed in a sequence different from that here, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps among them can be fabricated into a single integrated circuit module for implementation. In this way, the present application is not limited to any specific combination of hardware and software.

[0154] The foregoing is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the principle of the present application shall be included within the protection scope of the present application.

Claims

1. A method for separating and sealing waste gas, characterized in that: The method comprises: Determine the location of saline underground aquifers in the target area; Passing the waste gas to be treated into the underground saline water layer, and adjusting the pressure and temperature of the waste gas to separate the waste gas to obtain carbon dioxide and nitrogen; injecting the carbon dioxide into the underground saline aquifer for storage; The nitrogen is compressed and then injected into the underground saline aquifer for storage.

2. The method for separating and storing waste gas according to claim 1, characterized in that: The step of introducing the waste gas to be treated into the underground saline water layer and adjusting the pressure and temperature of the waste gas to separate the waste gas to obtain carbon dioxide and nitrogen comprises: Obtain property data for carbon dioxide and nitrogen; Based on the characteristic data of the carbon dioxide and nitrogen, a gas adsorption model is established, wherein the gas adsorption model is used to indicate the solubility of the carbon dioxide and nitrogen in the liquid; Obtaining geological parameters of the underground saline water layer in the target area; determining the adsorption capacity of the underground saline water layer according to the geological parameters; determining a target pressure according to the gas adsorption model and the adsorption capacity of the underground saline water layer; adjusting the pressure of the exhaust gas to the target pressure to increase the solubility of the exhaust gas in the underground saline water layer; Determining a target temperature according to the characteristic data of the carbon dioxide and the geological parameters; The temperature of the exhaust gas is adjusted to the target temperature to increase the rate at which the underground saline water layer absorbs the carbon dioxide, so as to separate the carbon dioxide from the nitrogen.

3. The method for separating and storing waste gas according to claim 1, characterized in that: The injecting the carbon dioxide into the underground saline water layer for storage comprises: Injecting the carbon dioxide into the underground saline layer according to preset injection parameters, wherein the injection parameters include injection rate, injection pressure, and injection temperature; The carbon dioxide concentration in the underground saline aquifer is monitored, and the injection parameters are adjusted according to the carbon dioxide concentration to seal the carbon dioxide in the underground saline aquifer.

4. The method for separating and storing waste gas according to claim 1, characterized in that: The step of compressing the nitrogen and injecting it into the underground saline water layer for storage comprises: collecting the separated nitrogen; filtering and drying the nitrogen; Compressing the nitrogen in multiple stages; The compressed nitrogen is injected into the nitrogen storage area in the underground saline aquifer for storage.

5. The method for separating and storing waste gas according to claim 4, characterized in that: The method further comprises: The stored nitrogen is released and transported to the power generation equipment through a pipeline to drive the power generation equipment to generate electricity; Alternatively, the stored nitrogen is extracted and purified before being used as an inert gas.

6. The method for separating and storing waste gas according to claim 1, characterized in that: The step of introducing the waste gas to be treated into the underground saline water layer comprises: Establishing an injection well in communication with the underground saline aquifer; The pretreated waste gas is injected into the underground saline water layer through the injection well.

7. A waste gas separation and sealing device, characterized in that: The device comprises: a location determination module for determining the location of the underground saline aquifer in the target area; A separation module, used for passing the waste gas to be treated into the underground saline water layer, and adjusting the pressure and temperature of the waste gas to separate the waste gas to obtain carbon dioxide and nitrogen; A storage module, used for injecting the carbon dioxide into the underground saline water layer for storage; The storage module is used to compress the nitrogen and then inject it into the underground saline water layer for storage.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein the program executes the method according to any one of claims 1 to 6 when executed.

9. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to execute the method according to any one of claims 1 to 6 through the computer program.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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