Carbon dioxide capturing method and device, storage medium and electronic device

Abstract

The invention discloses a carbon dioxide capturing method and device, a storage medium and an electronic device, and the method comprises the following steps: injecting flue gas into a phase splitter, so that the phase splitter absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light-phase absorbent and a rich-phase absorbent; sending the light-phase absorbent to an absorption tower, and sending the rich-phase absorbent to a regeneration tower connected with the phase splitter; the current carbon dioxide yield is determined according to the rich liquid volume of the rich liquid; and under the condition that the current carbon dioxide yield is determined to be lower than the preset yield, adjusting the injection speed of the absorbent, and obtaining the newly increased carbon dioxide yield obtained at the adjusted injection speed until the sum of the newly increased carbon dioxide yield and the current carbon dioxide yield is equal to the preset yield.

Description

Technical Field

[0001] The present application relates to the field of carbon dioxide capture, and in particular, to a carbon dioxide capture method and device, a storage medium and an electronic device. Background Art

[0002] With the continuous increase of global greenhouse gas emissions, how to reduce greenhouse gas emissions has become an important task to protect the environment. At present, carbon dioxide capture technology can be used to reduce greenhouse gas emissions and thus combat global climate change. Carbon dioxide capture technology, also known as carbon capture, utilization and storage (CCUS) technology, refers to a series of technologies for capturing, storing or utilizing carbon dioxide in the atmosphere. In energy production and industrial processes, carbon dioxide is captured using chemical, physical or biological methods. These methods include chemical absorption, physical absorption, membrane separation and chemical chain reaction. However, the capture efficiency of current methods for capturing carbon dioxide is not high, which will affect the subsequent recycling of carbon dioxide.

[0003] Therefore, in the related technology, there exists a technical problem of how to efficiently capture carbon dioxide.

[0004] Therefore, it is necessary to improve the related technology to overcome the above-mentioned defects in the related technology. Summary of the invention

[0005] The embodiments of the present application provide a method and device for capturing carbon dioxide, a storage medium, and an electronic device to at least solve the technical problem of how to efficiently capture carbon dioxide.

[0006] According to one aspect of an embodiment of the present application, a method for capturing carbon dioxide is provided, comprising: injecting flue gas into a phase separator so that the phase separator absorbs carbon dioxide in the flue gas using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent; sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to a regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and a light liquid corresponding to the light phase absorbent and a rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level of the light liquid is higher than the liquid level of the phase change liquid level, and the liquid level of the rich liquid is lower than the phase change liquid level; determining a current carbon dioxide capture amount according to a rich liquid volume of the rich liquid; and when it is determined that the current carbon dioxide capture amount is lower than a preset capture amount, adjusting the injection speed of the flue gas, and obtaining an additional carbon dioxide capture amount obtained at the adjusted injection speed, until the sum of the capture amounts between the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0007] In an exemplary embodiment, the current captured amount of carbon dioxide is determined based on the rich liquid volume of the rich liquid, including: performing image acquisition on the liquid stratification visible area of ​​the liquid storage tank in the absorption tower to obtain a liquid stratification image; performing image recognition on the liquid stratification image to obtain the rich liquid height of the rich liquid; determining the rich liquid volume of the rich liquid in the liquid storage tank based on the rich liquid height and the tank bottom area of ​​the liquid storage tank, and determining the current captured amount of carbon dioxide based on the rich liquid volume and the liquid density of the carbon dioxide.

[0008] In an exemplary embodiment, adjusting the injection speed of the flue gas includes: when determining that the phase separator is currently in normal operation, adjusting the injection speed of the flue gas by controlling a valve regulating valve of an injection valve to obtain a current injection speed, wherein the valve regulating valve is used to inject the flue gas.

[0009] In an exemplary embodiment, obtaining the additional captured carbon dioxide obtained by separation by the phase separator at the injection rate includes: determining an adjustment moment corresponding to the current injection rate, and determining a monitoring moment after a preset monitoring period has passed since the adjustment moment; and determining the additional captured carbon dioxide based on a time period between the monitoring moment and the adjustment moment and the current injection rate.

[0010] In an exemplary embodiment, the injection speed of the flue gas is adjusted by controlling the valve regulating valve of the injection valve to obtain the current injection speed, including: when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is less than the preset difference, controlling the valve regulating valve to reduce the adjustment value to reduce the injection speed to obtain the current injection speed; when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is greater than or equal to the preset difference, controlling the valve regulating valve to increase the adjustment value to speed up the injection speed to obtain the current injection speed.

[0011] In an exemplary embodiment, the injection speed of the flue gas is adjusted by controlling the valve regulating valve of the injection valve to obtain the current injection speed, including: using different sensors to monitor the carbon dioxide injected into the phase separator through the injection valve to obtain monitoring data, the monitoring data at least including the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide; inputting the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide into a control system so that the control system adjusts the injection speed based on the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide to obtain the current injection speed.

[0012] According to another aspect of an embodiment of the present application, a carbon dioxide capture device is also provided, including: a generation module, used to inject flue gas into a phase separator, so that the phase separator uses an absorbent in an absorption tower to absorb carbon dioxide in the flue gas to generate a light phase absorbent and a rich phase absorbent; a sending module, used to send the light phase absorbent to the absorption tower, and send the rich phase absorbent to a regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent are in the phase separator. A phase change liquid level is formed in the device, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the phase change liquid level; a determination module is used to determine the current carbon dioxide capture amount according to the rich liquid volume of the rich liquid; an adjustment module is used to adjust the injection speed of the flue gas when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, and obtain the additional carbon dioxide capture amount obtained at the adjusted injection speed, until the sum of the capture amount between the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0013] According to another aspect of the embodiments of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the above-mentioned carbon dioxide capture method when running.

[0014] According to another aspect of an embodiment of the present application, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the carbon dioxide capture method through the computer program.

[0015] According to another aspect of the present application, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0016] According to the present application, flue gas is injected into a phase separator so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent; the light phase absorbent is sent to the absorption tower, and the rich phase absorbent is sent to a regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and a light liquid corresponding to the light phase absorbent and a rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level of the light liquid is higher than the liquid level of the phase change liquid level, and the liquid level of the rich liquid is lower than the phase change liquid level; the current carbon dioxide capture amount is determined according to the rich liquid volume of the rich liquid; when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, the injection speed of the flue gas is adjusted, and the additional carbon dioxide capture amount obtained at the adjusted injection speed is obtained, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount, thereby solving the technical problem of how to efficiently capture carbon dioxide and improving the capture efficiency of carbon dioxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a hardware structure block diagram of a mobile terminal of a carbon dioxide capture method according to an embodiment of the present application;

[0020] Figure 2 is a flow chart of a method for capturing carbon dioxide according to an embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of a phase splitter according to an embodiment of the present application;

[0022] Figure 4 It is a structural block diagram of a carbon dioxide capture device according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0024] 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 are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] The method embodiments provided in the embodiments of the present application can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 1 is a hardware structure block diagram of a mobile terminal of a carbon dioxide capture method according to an embodiment of the present application. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor (Central Processing Unit, MCU) or a programmable logic device (Field Programmable Gate Array, FPGA)) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0026] 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 carbon dioxide capture method in the embodiment 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, to implement 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 memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0027] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0028] In this embodiment, a method for capturing carbon dioxide is provided. Figure 2 is a flow chart of a method for capturing carbon dioxide according to an embodiment of the present application, such as Figure 2 As shown, the process includes the following steps:

[0029] Step S202: injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent;

[0030] Step S204: sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the phase change liquid level height;

[0031] It should be noted that a phase separator is a device used for carbon capture. When the phase separator is in normal working condition, it can separate the mixture of gas and liquid into different phases. The separated pure liquid carbon dioxide is collected through the bottom of the phase separator, and other lighter gases, i.e. light liquid, are released or collected through the top of the phase separator.

[0032] It is understandable that the phase separator includes an absorption tower, and the absorption tower is used to perform liquid-liquid separation on the absorbent after absorbing carbon dioxide, that is, to separate it into a light phase (ie, light phase absorbent) and a heavy phase (ie, heavy phase absorbent).

[0033] Among them, the light phase absorbent is sent back to the absorption tower, and the heavy phase absorbent is sent to the regeneration tower for heating and regeneration.

[0034] Based on this, the present application proposes a solution: monitor the phase separation interface of the light phase and the heavy phase in the phase separator, and then adjust the injection rate of the flue gas based on the phase separation interface. Specifically: When the phase separation interface is low, it means that the light phase content in the phase separator is relatively high, and it is necessary to increase the circulation flow rate of the light liquid in the absorption tower. At this time, the excess light phase absorbent in the phase separator is sent to the absorption tower, and the inlet flue gas flow rate of the absorption tower is increased (that is, the flue gas injection rate is accelerated). When the phase separation interface is high, it means that the heavy phase content in the phase separator is relatively high, and it is necessary to increase the circulation flow rate of the rich liquid in the regeneration tower. At this time, the excess heavy phase in the phase separator is sent to the regeneration tower, and the inlet flue gas flow rate of the absorption tower is reduced (that is, the flue gas injection rate is reduced), so as to achieve real-time adjustment of the carbon dioxide capture efficiency and ensure stable operation of the carbon capture process.

[0035] Step S206: determining the current captured amount of carbon dioxide according to the rich liquid volume of the rich liquid;

[0036] Step S208: When it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, the injection rate of the flue gas is adjusted, and the additional carbon dioxide capture amount obtained at the adjusted injection rate is obtained, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0037] It can be understood that, based on the above steps, the present application also proposes a solution for adjusting the injection rate to improve the carbon dioxide capture effect and thus stabilize the carbon dioxide capture, that is, taking the difference between the captured carbon dioxide and the preset capture amount as the adjustment condition, adjusting the injection rate in real time until the captured carbon dioxide meets the preset capture amount.

[0038] Through the above steps, the flue gas is injected into the phase separator so that the phase separator absorbs the carbon dioxide in the flue gas by using the absorbent in the absorption tower to generate a light phase absorbent and a rich phase absorbent; the light phase absorbent is sent to the absorption tower, and the rich phase absorbent is sent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes the captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the phase change liquid level; the current carbon dioxide capture amount is determined according to the rich liquid volume of the rich liquid; when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, the injection speed of the flue gas is adjusted, and the additional carbon dioxide capture amount obtained at the adjusted injection speed is obtained, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount, thereby solving the technical problem of how to efficiently capture carbon dioxide and improving the capture efficiency of carbon dioxide.

[0039] Optionally, CO2 can be captured through other technologies including:

[0040] 1. Chemical absorption method: Use amine solvents (such as MEA, DEA, MDEA, etc.) to absorb carbon dioxide. The advantages are mature technology and wide application, but the disadvantages are high energy consumption, solvent degradation and volatilization problems.

[0041] 2. Physical absorption method: Absorb carbon dioxide through physical solvents (such as polyethers, carbonates, etc.). The advantages are simple operation and strong absorption capacity, but the disadvantages are high solvent costs and possible environmental risks.

[0042] 3. Membrane separation method: Use membrane materials to selectively separate carbon dioxide. The advantages are low energy consumption and simple equipment, but the disadvantages are relatively low separation efficiency and problems with the stability and life of membrane materials.

[0043] Optionally, in one embodiment, the collected liquid carbon dioxide can be stored in high pressure containers or used directly in industrial processes (such as coolant in the food industry or production of carbonated beverages).

[0044] In an exemplary embodiment, the process of determining the current carbon dioxide capture amount based on the rich liquid volume of the rich liquid in step S204 specifically includes: performing image acquisition on the liquid stratification visible area of ​​the liquid storage tank in the absorption tower to obtain a liquid stratification image; performing image recognition on the liquid stratification image to obtain the rich liquid height of the rich liquid; determining the rich liquid volume of the rich liquid in the liquid storage tank based on the rich liquid height and the tank bottom area of ​​the liquid storage tank, and determining the current carbon dioxide capture amount based on the rich liquid volume and the liquid density of the carbon dioxide.

[0045] In an exemplary embodiment, the injection speed of the flue gas is adjusted in the following manner, including: when it is determined that the phase separator is currently in normal operation, the injection speed of the flue gas is adjusted by controlling a valve regulating valve of an injection valve to obtain a current injection speed, wherein the valve regulating valve is used to inject the flue gas.

[0046] It should be noted that the operator may also manually intervene to adjust the flow rate or amount of carbon dioxide.

[0047] Optionally, a safety valve can be installed for the phase separator to prevent system failure due to excessive pressure or flow.

[0048] In an exemplary embodiment, a technical solution is further proposed for obtaining the additional captured amount of carbon dioxide separated by the phase separator at the injection rate, specifically comprising: determining an adjustment moment corresponding to the current injection rate, and determining a monitoring moment after a preset monitoring period from the adjustment moment; determining the additional captured amount of carbon dioxide based on the time period between the monitoring moment and the adjustment moment and the current injection rate.

[0049] In an exemplary embodiment, the process of adjusting the injection speed of the flue gas by controlling the valve regulating valve of the injection valve to obtain the current injection speed specifically includes: when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is less than the preset difference, controlling the valve regulating valve to reduce the adjustment value to reduce the injection speed to obtain the current injection speed; when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is greater than or equal to the preset difference, controlling the valve regulating valve to increase the adjustment value to speed up the injection speed to obtain the current injection speed.

[0050] In an exemplary embodiment, the injection speed of the flue gas can also be adjusted by controlling the valve regulating valve of the injection valve in other ways to obtain the current injection speed: different sensors are used to monitor the carbon dioxide injected into the phase separator through the injection valve to obtain monitoring data, and the monitoring data at least includes the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide; the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide are input into the control system, so that the control system adjusts the injection speed based on the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide to obtain the current injection speed.

[0051] In this embodiment, the above different sensors may include a flow meter, a pressure sensor, and a temperature sensor, and a flow meter may be used to measure the flow of carbon dioxide entering the phase separator. The flow meter may be mechanical, such as a turbine flow meter, or non-contact, such as an ultrasonic flow meter. A pressure sensor is used to monitor the pressure in the system to ensure that carbon dioxide is delivered to the phase separator at an appropriate pressure. A temperature sensor may also be used to monitor the temperature of carbon dioxide, because temperature affects its phase state and density.

[0052] By integrating the data of all sensors in the above control system, an automated control algorithm can be used to adjust the amount of carbon dioxide entering the phase separator. The control system is, for example, a programmable logic control system (PLC) or a distributed control system.

[0053] Based on the above embodiments, it can be determined that in the process of using a phase separator (or a steam-water separator) to separate carbon dioxide, it is crucial to control the injection speed. Specifically: by controlling the injection speed, it can be ensured that carbon dioxide and water or other gases have sufficient residence time in the phase separator, thereby improving the separation efficiency. If the injection speed is too fast, it may cause insufficient gas mixing and reduce the separation effect. At the same time, the gas injected at a high speed may cause liquid splashing or foaming, which will affect the condensation and separation of the droplets. Controlling the injection speed helps to reduce gas-liquid impact and ensure that the droplets can smoothly settle to the bottom of the phase separator. High-speed gas flow may cause pressure fluctuations inside the phase separator and affect the stability of the equipment. Therefore, controlling the injection speed helps to maintain the stability of the internal pressure of the equipment and extend the service life of the equipment. In addition, high-speed gas flow will increase the resistance of the system and increase energy consumption. Controlling the injection speed can reduce the energy consumption of the system and improve energy utilization efficiency. And considering that the high-speed gas flow may impact the internal structure of the phase separator, causing wear or damage. Controlling the injection speed helps to protect the equipment and reduce the frequency of maintenance and replacement.

[0054] The present application can realize accurate control of the entire separation process in the industrial production process by controlling the injection speed, ensuring the stability of product quality and output. Reduce the probability of secondary pollution caused by the separated gas carrying droplets again due to excessive injection speed. In addition, for different operating conditions (such as temperature, pressure, gas composition, etc.) that may affect the separation effect of the phase separator, the injection speed can be controlled to adjust according to actual conditions to obtain the best separation effect. In short, controlling the injection speed is one of the key factors to ensure that the phase separator effectively separates carbon dioxide. The present application can improve separation efficiency, reduce energy consumption, protect equipment, and ensure the stability and reliability of the entire separation process by reasonably controlling the injection speed.

[0055] Obviously, the embodiments described above are only some embodiments of the present application, not all embodiments. In order to better understand the above method, the above process is described below in conjunction with the embodiments, but it is not intended to limit the technical solutions of the embodiments of the present application, specifically:

[0056] In an optional embodiment, the present application is combined with Figure 3 The process of separating and obtaining carbon dioxide using a phase separator is described below:

[0057] Step 1. Ensure that the phase separator is in normal working condition. And determine the phase separator capacity and corresponding solution information (such as solution concentration).

[0058] Step 2. Inject flue gas into the phase separator and observe the stratification of the solution in the phase separator. Figure 3 As shown, the flow rate of the first phase is controlled by adjusting the valve of Q1. According to the change of the layer height, the opening degree of the valve of Q1 is gradually adjusted until the ideal layer height is reached.

[0059] Among them, H1 represents the total height of the liquid in the phase separator, and H2 represents the height of the rich liquid under the phase change level between the light liquid and the rich liquid. H1-H2 is the height of the light liquid. The flow rate 2 output through Q2 is determined in combination with the height H2 of the stratified solution in the phase separator, and the flow rate 3 output through Q3 is determined by the height of the light liquid. Subsequently, the flow rate 1 is inferred through "flow rate 1 through input Q1 = flow rate 2 output through Q2 + flow rate 3 output through Q3". By comparing the captured carbon dioxide (i.e., the current amount of carbon dioxide captured) with the preset capture amount, the valve to adjust Q1 is determined. Among them, Q1 represents the input exhaust gas end to be captured, which is used to control the flow entering the phase separator, Q2 is the output end of the rich liquid after the carbon dioxide is captured, and Q3 is the light liquid output end.

[0060] Step 3. During the adjustment process, the Q1 valve can be adjusted in real time by monitoring parameters such as pressure, flow and temperature on the equipment to ensure the stable operation of the phase separator and the accuracy of solution stratification.

[0061] Step 4. After the adjustment is completed, test the separation effect and carbon capture efficiency of the phase separator. Based on the data, the Q1 adjustment can be further optimized and improved.

[0062] Through the above implementation scheme, the solution layer height corresponding to the adjustment of Q1 can be effectively determined to improve the separation efficiency and carbon capture effect of the phase separator. Adjusting the Q1 valve can adjust the H2 height, which can further control the capture amount of carbon dioxide. At the same time, the capture efficiency of carbon dioxide can be determined according to the height changes of H1 and H2, which is convenient for adjusting the amount of regeneration solution and solution concentration later to ensure the continuous and efficient capture of carbon dioxide.

[0063] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course 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, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods of each embodiment of the present application.

[0064] In this embodiment, a carbon dioxide capture device is also provided, which is used to implement the above embodiments and preferred embodiments, and the descriptions that have been made will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0065] Figure 4 : is a structural block diagram of a carbon dioxide capture device according to an embodiment of the present application, the device comprising:

[0066] A generating module 42, for injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent;

[0067] A sending module 44 is used to send the light phase absorbent to the absorption tower, and send the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the height of the phase change liquid level;

[0068] A determination module 46, configured to determine a current captured amount of carbon dioxide according to a rich liquid volume of the rich liquid;

[0069] The adjustment module 48 is used to adjust the injection speed of the flue gas when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, and obtain the additional carbon dioxide capture amount obtained at the adjusted injection speed until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0070] Through the above-mentioned device, flue gas is injected into the phase separator so that the phase separator absorbs carbon dioxide in the flue gas by using the absorbent in the absorption tower to generate a light phase absorbent and a rich phase absorbent; the light phase absorbent is sent to the absorption tower, and the rich phase absorbent is sent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the phase change liquid level; the current carbon dioxide capture amount is determined according to the rich liquid volume of the rich liquid; when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, the injection speed of the flue gas is adjusted, and the additional carbon dioxide capture amount obtained at the adjusted injection speed is obtained, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount, thereby solving the technical problem of how to efficiently capture carbon dioxide and improving the capture efficiency of carbon dioxide.

[0071] In an exemplary embodiment, the determination module 44 is further used to: capture images of the liquid stratification visible area of ​​the liquid storage tank in the absorption tower to obtain a liquid stratification image; perform image recognition on the liquid stratification image to obtain the rich liquid height of the rich liquid; determine the rich liquid volume of the rich liquid in the liquid storage tank according to the rich liquid height and the tank bottom area of ​​the liquid storage tank, and determine the current capture amount of carbon dioxide according to the rich liquid volume and the liquid density of the carbon dioxide.

[0072] In an exemplary embodiment, the adjustment module 48 is also used to: when it is determined that the phase separator is currently in normal operation, adjust the injection speed of the flue gas by controlling the valve regulating valve of the injection valve to obtain the current injection speed, wherein the valve regulating valve is used to inject the flue gas.

[0073] In an exemplary embodiment, the adjustment module 48 is further used to: determine an adjustment moment corresponding to the current injection rate, and determine a monitoring moment after a preset monitoring period starting from the adjustment moment; and determine the additional carbon dioxide capture amount based on a time period between the monitoring moment and the adjustment moment and the current injection rate.

[0074] In an exemplary embodiment, the adjustment module 48 is further used to: when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is less than the preset difference, control the valve regulating valve to reduce the adjustment value to reduce the injection speed, so as to obtain the current injection speed; when it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is greater than or equal to the preset difference, control the valve regulating valve to increase the adjustment value to speed up the injection speed, so as to obtain the current injection speed.

[0075] In an exemplary embodiment, the adjustment module 48 is also used to: use different sensors to monitor the carbon dioxide injected into the phase separator via the injection valve to obtain monitoring data, wherein the monitoring data at least includes the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide; input the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide into a control system so that the control system adjusts the injection speed based on the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide to obtain the current injection speed.

[0076] An embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0077] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0078] S1, injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent;

[0079] S2, sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the height of the phase change liquid level;

[0080] S3, determining a current captured amount of carbon dioxide according to the rich liquid volume of the rich liquid;

[0081] S4, when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, adjust the injection rate of the flue gas, and obtain the additional carbon dioxide capture amount obtained at the adjusted injection rate, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0082] In an exemplary embodiment, the computer-readable storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk.

[0083] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0084] An embodiment of the present application further provides an electronic device, including a memory and a processor, wherein 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.

[0085] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0086] S1, injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent;

[0087] S2, sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the height of the phase change liquid level;

[0088] S3, determining a current captured amount of carbon dioxide according to the rich liquid volume of the rich liquid;

[0089] S4, when it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, adjust the injection rate of the flue gas, and obtain the additional carbon dioxide capture amount obtained at the adjusted injection rate, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

[0090] In an exemplary embodiment, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0091] An embodiment of the present application further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps in any one of the above method embodiments are implemented.

[0092] An embodiment of the present application further provides another computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps in any of the above method embodiments are implemented.

[0093] An embodiment of the present application also provides a computer program, which includes computer instructions, which are stored in a computer-readable storage medium; a processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device performs the steps in any one of the above method embodiments.

[0094] For specific examples in this embodiment, reference may be made to the examples described in the above embodiments and exemplary implementation modes, and this embodiment will not be described in detail herein.

[0095] Obviously, those skilled in the art should understand that the above modules or steps of the present application can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, they can be implemented by a program code executable by a computing device, so that 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 different order from that herein, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present application is not limited to any specific combination of hardware and software.

[0096] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for capturing carbon dioxide, characterized in that: include: Injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent; Sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the height of the phase change liquid level; determining a current captured amount of carbon dioxide based on a rich liquid volume of the rich liquid; When it is determined that the current carbon dioxide capture amount is lower than the preset capture amount, the injection rate of the flue gas is adjusted, and the additional carbon dioxide capture amount obtained at the adjusted injection rate is obtained until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

2. The method according to claim 1, characterized in that Determining the current captured amount of carbon dioxide according to the rich liquid volume of the rich liquid includes: Capturing images of a liquid stratification visible area of ​​a liquid storage tank in the absorption tower to obtain a liquid stratification image; Performing image recognition on the liquid layered image to obtain the rich liquid height of the rich liquid; The rich liquid volume of the rich liquid in the liquid storage tank is determined according to the rich liquid height and the tank bottom area of ​​the liquid storage tank, and the current captured amount of carbon dioxide is determined according to the rich liquid volume and the liquid density of carbon dioxide.

3. The method according to claim 1, characterized in that Adjusting the injection speed of the flue gas comprises: When it is determined that the phase separator is currently in normal operation, the injection speed of the flue gas is adjusted by controlling the valve regulating valve of the injection valve to obtain the current injection speed, wherein the valve regulating valve is used to inject the flue gas.

4. The method according to claim 3, characterized in that Obtaining the newly captured amount of carbon dioxide separated by the phase separator at the injection rate, comprising: Determine an adjustment time corresponding to the current injection speed, and determine a monitoring time after a preset monitoring period has passed since the adjustment time; The additional captured amount of carbon dioxide is determined based on a time period between the monitoring time and the adjustment time and the current injection rate.

5. The method according to claim 3, characterized in that: The injection speed of the flue gas is adjusted by controlling the valve regulating valve of the injection valve to obtain the current injection speed, including: When it is determined that the difference between the current carbon dioxide capture amount and the preset capture amount is less than the preset difference, controlling the valve regulating valve to reduce the adjustment value to reduce the injection speed, thereby obtaining a current injection speed; When it is determined that the difference between the current captured amount of carbon dioxide and the preset captured amount is greater than or equal to the preset difference, the valve regulating valve is controlled to increase the regulating value to speed up the injection speed, thereby obtaining the current injection speed.

6. The method according to claim 3, characterized in that The injection speed of the flue gas is adjusted by controlling the valve regulating valve of the injection valve to obtain the current injection speed, including: Using different sensors to monitor the carbon dioxide injected into the phase separator via the injection valve to obtain monitoring data, wherein the monitoring data at least includes flow data of the carbon dioxide, pressure data of the carbon dioxide, and temperature data of the carbon dioxide; The flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide are input into a control system so that the control system adjusts the injection speed based on the flow data of the carbon dioxide, the pressure data of the carbon dioxide, and the temperature data of the carbon dioxide to obtain a current injection speed.

7. A carbon dioxide capture device, characterized in that: include: A generating module, used for injecting flue gas into a phase separator, so that the phase separator absorbs carbon dioxide in the flue gas by using an absorbent in an absorption tower to generate a light phase absorbent and a rich phase absorbent; a sending module, used for sending the light phase absorbent to the absorption tower, and sending the rich phase absorbent to the regeneration tower connected to the phase separator, wherein the rich phase absorbent at least includes captured carbon dioxide, and the light liquid corresponding to the light phase absorbent and the rich liquid corresponding to the rich phase absorbent form a phase change liquid level in the phase separator, the liquid level height of the light liquid is higher than the liquid level height of the phase change liquid level, and the liquid level height of the rich liquid is lower than the height of the phase change liquid level; a determination module for determining a current carbon dioxide capture amount according to a rich liquid volume of the rich liquid; and an adjustment module for adjusting an injection rate of the flue gas when it is determined that the current carbon dioxide capture amount is lower than a preset capture amount, and obtaining an additional carbon dioxide capture amount at the adjusted injection rate, until the sum of the additional carbon dioxide capture amount and the current carbon dioxide capture amount is equal to the preset capture amount.

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 steps of the method according to any one of claims 1 to 6 are implemented.

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