Intelligent carbon capture and utilization method and device, control equipment and medium

Abstract

The invention discloses an intelligent carbon capture and utilization method and device, control equipment and a medium in the technical field of carbon dioxide capture. The method comprises the following steps: pretreating flue gas; conveying a chemical absorbent and the pretreated flue gas into a carbon capture and utilization device for mixing, so that the chemical absorbent and the flue gas are subjected to full contact reaction within a preset range to generate soluble salt; in the mixing process of the chemical absorbent and the flue gas, the temperature is regulated and controlled; a carbon capture and utilization device is used for separating the soluble salt and the flue gas after the mixed reaction, the flue gas after the mixed reaction is discharged, the separated soluble salt is recycled, and the soluble salt is used for reducing the chemical absorbent and releasing CO2; conveying the reduced chemical reagent into the carbon capture and utilization device again; and the released CO2 is collected and compressed. According to the scheme, the contact area of the chemical absorbent and the flue gas is increased, and the mixing and reaction between the chemical absorbent and the flue gas are promoted, so that the CO2 trapping efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon dioxide capture, and specifically relates to an intelligent carbon capture and utilization method, device, control equipment and medium. Background Art

[0002] In the urgent situation of global climate change and environmental protection, reducing greenhouse gas emissions, especially carbon dioxide (CO2), has become the core of global consensus and action. Carbon capture, utilization and storage (CCUS) technology, as one of the key strategies to mitigate climate change, is increasingly gaining attention from governments, enterprises and scientific research institutions. This technology aims to efficiently capture CO2 from industrial emission sources or energy production processes, and permanently isolate it from the atmosphere through reuse or safe storage, thereby slowing down the trend of global warming.

[0003] In the CCUS technology system, carbon capture technology plays a vital role, which is mainly divided into three capture paths: before combustion, during combustion and after combustion. Among them, post-combustion capture technology is favored because it can be adapted to existing power generation facilities. In this technical field, the alkaline solution absorption method, especially the method of using sodium hydroxide (NaOH) solution to absorb CO2, is widely used due to its high efficiency and relatively mature technical basis. However, as the absorption process continues, the effective absorption capacity of the NaOH solution gradually decays, becoming a bottleneck restricting the efficiency and cost-effectiveness of the technology.

[0004] Therefore, there is an urgent need for an intelligent carbon capture and utilization method, device, control equipment and medium that can achieve efficient CO2 capture. Summary of the invention

[0005] In order to solve the above problems, the purpose of the present invention is to provide an intelligent carbon capture and utilization method, device, control equipment and medium, which can reduce the impact of changes in absorbent concentration during the CO2 capture process by optimizing the design and operating parameters of the entire capture system, thereby ensuring the stability of CO2 during the capture process.

[0006] In order to achieve the above object, the technical solution of the present invention is as follows:

[0007] An intelligent carbon capture and utilization method comprises the following steps:

[0008] Pre-treatment of flue gas;

[0009] The chemical absorbent and the pretreated flue gas are continuously transported to the carbon capture and utilization device from different inlets for mixing, so that the chemical reagent and the pretreated flue gas are fully contacted and reacted within a preset range to generate soluble salts;

[0010] During the mixing process of chemical absorbent and flue gas, the temperature is regulated;

[0011] The soluble salt is separated from the flue gas after the mixed reaction by using a carbon capture and utilization device, and then the flue gas after the mixed reaction is discharged, the separated soluble salt is recovered, and the soluble salt is used to reduce the chemical absorbent and release CO2;

[0012] The reduced chemical reagents are transported back to the carbon capture and utilization device;

[0013] The released CO2 is collected and compressed for processing.

[0014] The above scheme has the following beneficial effects:

[0015] 1. This solution ensures the stability of the flue gas quality entering the carbon capture and utilization device by intelligently pre-treating the flue gas, thereby reducing the impact of impurities on the subsequent capture process.

[0016] 2. In this scheme, the chemical absorbent and the pretreated flue gas are continuously fed into the carbon capture and utilization device at an optimal ratio and flow rate. By real-time monitoring and adjusting the reaction conditions, it is ensured that the two are fully contacted and reacted within the preset range to generate soluble salts, thereby efficiently capturing CO2.

[0017] 3. In this scheme, advanced temperature control technology is used during the mixing reaction process to ensure that the reaction is carried out within the optimal temperature range, which can not only improve the reaction rate and capture efficiency, but also reduce unnecessary energy consumption and the occurrence of side reactions.

[0018] Further, the flue gas pretreatment steps include:

[0019] Cooling: Cooling the high-temperature flue gas through a heat exchanger to reduce its temperature to a range suitable for subsequent capture processes;

[0020] Dust removal, using dust removal equipment to remove particulate matter from flue gases;

[0021] Denitrification, which converts nitrogen oxides in flue gas into nitrogen and water through selective catalytic reduction or selective non-catalytic reduction technology;

[0022] Desulfurization, using wet desulfurization or dry desulfurization technology to remove sulfur dioxide from flue gas.

[0023] Beneficial effects: Lowering the temperature of flue gas can reduce the energy consumption and possible heat loss caused by high temperature in the subsequent capture process. At the same time, the appropriate temperature is conducive to the reaction between the capture agent and CO2, thereby improving the capture efficiency.

[0024] Removing particulate matter from flue gas can prevent these particles from clogging the capture equipment, ensure smooth gas flow, and thus improve capture efficiency. In addition, clean flue gas also helps reduce the loss of capture agents and wear of equipment.

[0025] Nitrogen oxides may react with chemical absorbents during the capture process, consuming them and producing unnecessary byproducts, which can affect the capture efficiency of CO2. Through denitrification treatment, this interference can be reduced, allowing chemical absorbents to react with CO2 more effectively.

[0026] The reaction of sulfur dioxide with chemical absorbents forms compounds that are difficult to separate, affecting the separation and capture efficiency of CO2. Desulfurization treatment can effectively remove SO2 and reduce its negative impact on the capture process.

[0027] Furthermore, the preset range is twice the boundary layer thickness of the fluid.

[0028] Beneficial effects: Setting the preset range to twice the boundary layer thickness of the fluid can ensure that the chemical absorbent and the flue gas have sufficient contact time and area during the mixing reaction. The boundary layer is a thin layer formed when the fluid contacts the solid surface, in which the fluid properties (such as velocity, temperature, and concentration) change significantly. By considering twice the boundary layer thickness of the fluid, the reaction area can be controlled more accurately, allowing the chemical absorbent to contact and react with the CO2 in the flue gas more effectively, thereby improving the CO2 capture efficiency.

[0029] Furthermore, the chemical absorbent uses a KOH solution or a NaOH solution.

[0030] Beneficial effects: Both NaOH solution and KOH solution have strong CO2 absorption performance and can quickly react with CO2 in flue gas to generate salt and water to achieve CO2 capture.

[0031] Furthermore, the specific steps of reducing the chemical absorbent with the soluble salt are: reacting the soluble salt with Ca(OH)2 to generate calcium carbonate and alkali, and then obtaining the chemical absorbent by centrifugation and filtration.

[0032] Furthermore, the specific steps of releasing CO2 are: heating calcium carbonate to generate calcium oxide and CO2, and then mixing calcium oxide with water to react to prepare Ca(OH)2.

[0033] Beneficial effects: It not only achieves the capture and release of CO2, but also promotes the recycling of resources (Ca(OH)2).

[0034] Furthermore, a carbon capture and utilization device is provided, comprising an absorption tower body; a first chamber is arranged in the absorption tower body; at least one mixing assembly is arranged in the first chamber; the mixing assembly comprises a carrier; the carrier is fixedly connected to the first chamber; a second chamber is arranged in the carrier; a plurality of discs are arranged in the second chamber, a plurality of circular holes are arranged circumferentially at the axis of the discs, the discs are spaced at a preset distance, the discs are coaxially fixedly connected, the discs near the top and bottom of the second chamber are rotatably connected to the second chamber; the second chamber is respectively connected with a feed pipe for conveying a chemical absorbent and an air intake pipe for conveying flue gas; a plurality of conveying pipes are also arranged in the absorption tower body, the conveying pipes are respectively connected with the circular holes, the adjacent conveying pipes are connected with each other, and the conveying pipes are used to convey the chemical absorbent and the flue gas The product after gas mixing is discharged from the absorption tower body; a temperature control component is also arranged on the carrier; the temperature control component includes a heat exchange tube, the heat exchange tube is located in the side wall of the second chamber, and a temperature difference power generation sheet is also arranged on one side of the heat exchange tube, and the temperature difference power generation sheet is located between the heat exchange tube and the second chamber; the temperature difference power generation sheet is electrically connected to the control module; both ends of the heat exchange tube are connected with a tee, and a diverter valve is arranged at the three-way intersection in the tee; the tee is respectively connected with a cold water tank and an insulation box; a delivery pump is arranged between the tee and the cold water tank and between the tee and the insulation box, and the delivery pump is used to realize water circulation between the tee, the heat exchange tube, the cold water tank and the insulation box; the control module is used to judge the temperature condition in the second chamber based on the power generation condition of the temperature difference power generation sheet, and control the operation of the diverter valve and the delivery pump.

[0035] Beneficial effects: In this scheme, the chemical absorbent is delivered to the mixing component through the feed pipe, and the flue gas is delivered to the mixing component through the air intake pipe. After the flue gas and the chemical absorbent enter the second chamber respectively, they flow between the discs, and the boundary layer effect of the fluid is used to drive the disc to rotate. The rotation of the disc causes the chemical absorbent and the flue gas to flow inward along the side of the disc in a spiral and mix. The soluble salts produced after mixing, the chemical absorbent that has not reacted completely, and the flue gas after eliminating CO2 are discharged into the delivery pipe through the circular hole at the axis of the disc. Due to the effects of the density and gravity of the liquid and gas, the liquid flows downward along the delivery pipe, and the gas flows upward along the delivery pipe, thereby separating the gas and liquid; at the same time. When the liquid of the mixing component of the upper layer flows to the lower layer, the gas in the delivery pipe of the lower layer will impact with the liquid of the upper layer, so that the unabsorbed CO2 in the gas and the unreacted chemical absorbent in the liquid are mixed and reacted again, thereby further improving the CO2 capture efficiency.

[0036] When the chemical absorbent and CO2 react in the second chamber, a large amount of heat will be released. The control module will control the diverter valve and the delivery pump to deliver the cold water in the cold water tank to the heat exchange tube to cool the second chamber and maintain the temperature in the second chamber in a suitable range to promote the reaction between CO2 and the chemical absorbent. After the cold water passes through the heat exchange tube, it absorbs heat and becomes hot water. The control module controls the corresponding diverter valve and delivery pump to make the hot water flow into the insulation box for storage.

[0037] When the power generation of the temperature difference power generation sheet is low, it means that the temperature in the second chamber is low, and the reaction between CO2 and the chemical absorbent is not sufficient. The control module controls the corresponding diverter valve and delivery pump to stop the cold water tank from delivering cold water, and introduces the hot water originally stored in the insulation box into the heat exchange tube to heat up the second chamber and maintain the temperature in a suitable range, thereby ensuring the stability of the CO2 reaction.

[0038] Compared with the existing technology, this solution achieves full mixing of chemical absorbent and flue gas through the design of the disc and its rotation mechanism. The spiral flow between the discs not only increases the contact area, but also promotes the mass transfer efficiency between gas and liquid, making the reaction between CO2 and chemical absorbent more complete, thereby improving the CO2 capture efficiency.

[0039] The natural stratification and flow characteristics of liquid and gas in the conveying pipe are used to achieve effective separation of gas and liquid. This design does not require additional separation equipment, simplifies the process flow, and reduces energy consumption and costs.

[0040] When the liquid from the previous layer flows to the next layer, it impacts the gas in the next layer, achieving a remixing reaction of the unabsorbed CO2 and the unreacted chemical absorbent. This multi-stage reaction mechanism further improves the CO2 capture efficiency and ensures the maximum utilization of resources.

[0041] Through the cooperation of the thermoelectric power generation chip and the control module, the temperature of the second chamber is intelligently controlled. According to the heat release of the reaction, cold water or hot water is automatically selected for heat exchange to ensure that the reaction temperature is maintained in the optimal range, which not only promotes the reaction, but also avoids the decrease in efficiency or increase in energy consumption caused by too high or too low temperature.

[0042] The heat released by the reaction is converted into electrical energy by using a thermoelectric generator to power the control module and other equipment, thus realizing energy recycling. At the same time, the hot water is stored in an insulated box and can be used for subsequent heating or other purposes, further improving energy efficiency.

[0043] Furthermore, the second chamber is cylindrical in shape, and the air inlet pipe and the feed pipe are both arranged along the tangent direction of the second chamber.

[0044] Beneficial effects: The tangential air intake design allows the flue gas to form a rotating airflow when it enters the second chamber. This rotating motion helps to evenly distribute the flue gas throughout the chamber and fully mix it with the chemical absorbent entering from the tangential direction. The rotating airflow can also promote mass transfer between gas and liquid, increase the contact area, and thus improve the reaction efficiency of CO2 and chemical absorbent.

[0045] Furthermore, a carbon capture and utilization control device is provided, comprising a memory, a processor, and a program or instruction stored in the memory and executable on the processor. When the program or instruction is executed by the processor, the carbon capture and utilization control device implements the carbon capture and utilization method.

[0046] Furthermore, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the carbon capture and utilization method is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a flow chart of an intelligent carbon capture and utilization method, device, control equipment and medium embodiment 1 of the present invention.

[0048] Figure 2 Schematic diagram of the three-dimensional structure of the absorption tower.

[0049] Figure 3 for Figure 2 Side view of.

[0050] Figure 4 for Figure 3 Middle AA section view.

[0051] Figure 5 It is a structural schematic diagram of a three-way pipe.

[0052] Figure 6 for Figure 4 A partial enlarged schematic diagram of point B in the middle.

[0053] Figure 7 Schematic diagram of the three-dimensional structure of the disk.

[0054] Figure 8 A three-dimensional schematic diagram of the support frame.

[0055] The figure marks in the drawings of the specification include: 1. absorption tower body; 2. air inlet pipe; 3. feed pipe; 4. heat exchange tube; 5. temperature difference power generation sheet; 6. second chamber; 7. disc; 8. one-way valve; 101. first chamber; 102. carrier; 103. delivery pipe; 104. three-way pipe; 105. diverter valve; 106. delivery pump; 107. cold water tank; 108. insulation box; 701. round hole; 702. support frame. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0057] In the description of the present invention, it is to be understood that the terms “longitudinal”, “lateral”, “vertical”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0059] The following is further described in detail through specific implementation methods:

[0060] Embodiment 1 is basically as attached Figure 1-Figure 8 As shown:

[0061] An intelligent carbon capture and utilization method comprises the following steps:

[0062] Pre-treatment of flue gas;

[0063] Specifically, the flue gas pretreatment steps include:

[0064] Cooling: Cooling the high-temperature flue gas through a heat exchanger to reduce its temperature to a range suitable for the subsequent capture process. In this embodiment, a cooling medium (such as water or air) is used to reduce the flue gas temperature to a range suitable for the subsequent capture process, usually several tens of degrees Celsius;

[0065] Dust removal, using dust removal equipment (such as bag filters or electrostatic precipitators) to remove particulate matter from flue gases;

[0066] Denitrification, through selective catalytic reduction or selective non-catalytic reduction technology, converts nitrogen oxides in flue gas into nitrogen and water, reducing nitrogen oxide emissions.

[0067] Desulfurization, using wet desulfurization or dry desulfurization technology to remove sulfur dioxide from flue gas.

[0068] The chemical absorbent and the pretreated flue gas are continuously transported to the carbon capture and utilization device from different inlets for mixing, so that the chemical reagent and the pretreated flue gas are fully contacted and reacted within a preset range to generate soluble salts;

[0069] Specifically, the chemical absorbent is a KOH solution or a NaOH solution, and in this embodiment, a NaOH solution is used.

[0070] Specifically, as attached Figure 2 As shown, the carbon capture and utilization device comprises an absorption tower body 1; a first chamber 101 is provided in the absorption tower body 1; at least one mixing component is provided in the first chamber 101, as shown in the attached Figure 2 , Attachment Figure 3 , Attachment Figure 4 As shown, in this embodiment, two groups of mixing components are provided; the mixing components include a carrier 102; the carrier 102 is welded and fixed to the first chamber 101; a second chamber 6 is provided in the carrier 102, and specifically, the second chamber 6 is cylindrical in shape.

[0071] A plurality of discs 7 are arranged in the second chamber 6, and a plurality of circular holes 701 are circumferentially arranged at the axis of the discs 7. The discs 7 are spaced at a preset distance, and the discs 7 are coaxially welded and fixed. The discs 7 near the top and bottom of the second chamber 6 are rotatably connected to the second chamber 6 through bearings; the second chamber 6 is respectively connected with a feed pipe 3 for conveying chemical absorbent and an air intake pipe 2 for conveying flue gas. Specifically, the air intake pipe 2 and the feed pipe 3 are arranged tangentially to the second chamber 6, and a one-way valve 8 is bolted in the feed pipe 3 and the air intake pipe 2 to prevent the backflow of flue gas and chemical absorbent from affecting the normal operation of the discs 7; a plurality of conveying pipes 103 are also arranged in the absorption tower body 1. In this embodiment, as shown in the attached Figure 4 As shown, the delivery pipe 103 is laid along the axis of the first chamber 101, and the delivery pipe 103 is connected to the circular holes 701 respectively. Figure 7 and attached Figure 8 As shown, a support frame 702 is welded and fixed in the delivery pipe 103, and the axis of the disk 7 (specifically the top and bottom disks 7, as shown in the attached Figure 6 As shown in the figure, the circular hole 701 is welded and fixed to the axis of the support frame 702, and the circular hole 701 is connected to the conveying pipe 103 through the hollow area of ​​the support frame 702.

[0072] Adjacent delivery pipes 103 are interconnected, and the delivery pipes 103 are used to discharge the product of the mixture of chemical absorbent and flue gas out of the absorption tower body 1; a temperature control component is also provided on the carrier 102; the temperature control component includes a heat exchange tube 4, the heat exchange tube 4 is embedded in the side wall of the second chamber 6, and a thermoelectric power generation sheet 5 is welded and fixed on one side of the heat exchange tube 4, and the thermoelectric power generation sheet 5 is located between the heat exchange tube 4 and the second chamber 6; the thermoelectric power generation sheet 5 is electrically connected to the control module; both ends of the heat exchange tube 4 are connected with a three-way pipe 104, as shown in the attached Figure 5 As shown, a diverter valve 105 is provided at the three-way intersection in the three-way pipe 104; the three-way pipe 104 is respectively connected to the cold water tank 107 and the insulation box 108; a delivery pump 106 is bolted between the three-way pipe 104 and the cold water tank 107 and between the three-way pipe 104 and the insulation box 108, and the delivery pump 106 is used to realize water circulation between the three-way pipe 104, the heat exchange tube 4, the cold water tank 107 and the insulation box 108; the control module is used to judge the temperature condition in the second chamber 6 based on the power generation condition of the temperature difference power generation sheet 5, and control the operation of the diverter valve 105 and the delivery pump 106.

[0073] During the mixing process of chemical absorbent and flue gas, the temperature is regulated;

[0074] Specifically, during the mixing process, the temperature in the second chamber 6 is regulated by the temperature control component. The heat exchange tube 4 is located in the side wall of the second chamber 6. When cold water passes through the heat exchange tube 4, heat exchange will occur with the second chamber 6. Thermoelectric power generation relies on the temperature difference between the heat exchange tube 4 and the second chamber 6 to generate electricity. According to the power generation of the thermoelectric power generation sheet 5, the control module determines the temperature in the second chamber 6. Specifically, initially, when the chemical absorbent and CO2 are mixed and reacted in the second chamber 6, heat is released, causing the temperature in the second chamber 6 to rise. The thermoelectric power generation sheet 5 will detect the temperature difference and generate electricity.

[0075] The control module determines whether cooling is needed based on the power generation of the temperature difference power generation sheet 5 (indirectly reflecting the temperature). If the power generation exceeds the preset threshold (indicating that the temperature is too high), the control module will start the corresponding diverter valve 105 and the delivery pump 106, draw cold water from the cold water tank 107, and circulate the cold water to the second chamber 6 through the heat exchange pipe 4 for cooling.

[0076] When the cold water flows in the heat exchange tube 4, it absorbs the heat released by the second chamber 6, thereby lowering the temperature in the chamber and allowing the reaction to proceed within a suitable temperature range.

[0077] After passing through the heat exchange tube 4, the cold water absorbs heat and becomes hot water. At this time, the control module will control the corresponding diverter valve 105 and the delivery pump 106 to guide the hot water to the insulation box 108 for storage so that it can be used for heating later.

[0078] When the power generation of the thermoelectric power generation sheet 5 is low (indicating that the temperature in the second chamber 6 is low, which may be caused by a reduced reaction rate or external factors), the control module will determine whether the temperature needs to be increased.

[0079] If the temperature needs to be raised, the control module will stop delivering cold water from the cold water tank 107 to the heat exchange tube 4 , and start the diverter valve 105 and the delivery pump 106 that deliver hot water from the insulation tank 108 to the heat exchange tube 4 .

[0080] The hot water enters the second chamber 6 through the heat exchange tube 4, and heats the chamber so that its temperature returns to a suitable range, thereby ensuring that the reaction between CO2 and the chemical absorbent can proceed stably.

[0081] The soluble salt is separated from the flue gas after the mixed reaction by using a carbon capture and utilization device, and then the flue gas after the mixed reaction is discharged, the separated soluble salt is recovered, and the soluble salt is used to reduce the chemical absorbent and release CO2;

[0082] Specifically, after the flue gas and the chemical absorbent enter the second chamber 6 at the same time, due to the initial kinetic energy of the fluid and the boundary layer effect, they drive the discs 7 to rotate slowly when flowing in the gaps between the discs 7. This self-driving mechanism does not require an external power source, effectively reducing energy consumption.

[0083] As the disc 7 rotates, the chemical absorbent and the flue gas are forced to flow inward in a spiral along the side of the disc 7. This spiral mixing method greatly increases the contact area and contact time between the fluids, promotes the full reaction of CO2 and the chemical absorbent, and generates soluble salts (such as potassium carbonate or sodium carbonate).

[0084] The soluble salts produced after mixing, the chemical absorbent that has not reacted completely, and the flue gas from which most of the CO2 has been eliminated enter the delivery pipe 103 through the circular hole 701 at the axis of the disk 7. In the delivery pipe 103, due to the difference in density and gravity between the liquid and the gas, they are naturally separated: the liquid (mainly the soluble salts and the unreacted chemical absorbent) flows downward, while the gas (mainly the flue gas, which may still contain a small amount of unabsorbed CO2) flows upward.

[0085] As attached Figure 3 As shown, when the liquid discharged from the upper mixing assembly flows to the next layer, it will have a strong impact with the gas rising in the next layer of the delivery pipe 103. This impact not only helps to further separate the gas and liquid, but also promotes the unabsorbed CO2 in the gas and the unreacted chemical absorbent in the liquid to mix and react again.

[0086] The treated flue gas is discharged from the top of the absorption tower body 1, and the liquid rich in soluble salts is collected at the bottom of the absorption tower body 1 and sent to the subsequent processing unit for recovery and regeneration.

[0087] Specifically, the specific steps of reducing the chemical absorbent with a soluble salt are: reacting the soluble salt with Ca(OH)2 to generate calcium carbonate and alkali, and then obtaining the chemical absorbent by centrifugation and filtration.

[0088] The specific steps of releasing CO2 are: heating calcium carbonate to generate calcium oxide and CO2, and then mixing calcium oxide with water to react to prepare Ca(OH)2.

[0089] The reduced chemical reagents are transported back to the carbon capture and utilization device;

[0090] In this embodiment, the chemical absorbent is NaOH solution. During the entire CO2 capture process, the chemical reactions experienced are as follows:

[0091] 2NaOH (aq) +CO 2(g) =Na2CO 3(aq) +H2O (l)

[0092] Na2CO 3(aq) +Ca(OH) 2(s) =CaCO 3(s) +2NaOH (aq)

[0093] CaCO 3(s) =CaO (s) +CO 2(g)

[0094] CaO (s) +H2O (g) =Ca(OH) 2(s)

[0095] The released CO2 is collected and compressed for processing, and the captured CO2 can be used in chemical production, building materials and other fields to achieve resource recycling and sustainable economic development.

[0096] The only difference between Example 2 and the above-mentioned Example 1 is that a carbon capture and utilization control device is also provided, including a memory, a processor, and a program or instruction stored in the memory and executable on the processor, and these components work together to realize an intelligent carbon capture and utilization method.

[0097] The only difference between Example 3 and the above-mentioned Example 1 and Example 2 is that a readable storage medium is also provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the carbon capture and utilization method is implemented.

[0098] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and / or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An intelligent carbon capture and utilization method, characterized in that: The following steps are involved: Pre-treatment of flue gas; The chemical absorbent and the pretreated flue gas are continuously transported to the carbon capture and utilization device from different inlets for mixing, so that the chemical reagent and the pretreated flue gas are fully contacted and reacted within a preset range to generate soluble salts; During the mixing process of chemical absorbent and flue gas, the temperature is regulated; The soluble salt is separated from the flue gas after the mixed reaction by using a carbon capture and utilization device, and then the flue gas after the mixed reaction is discharged, the separated soluble salt is recovered, and the soluble salt is used to reduce the chemical absorbent and release CO2; The reduced chemical reagents are transported back to the carbon capture and utilization device; The released CO2 is collected and compressed for processing.

2. The intelligent carbon capture and utilization method according to claim 1 is characterized in that: Flue gas pretreatment steps include: Cooling: Cooling the high-temperature flue gas through a heat exchanger to reduce its temperature to a range suitable for subsequent capture processes; Dust removal, using dust removal equipment to remove particulate matter from flue gases; Denitrification, which converts nitrogen oxides in flue gas into nitrogen and water through selective catalytic reduction or selective non-catalytic reduction technology; Desulfurization, using wet desulfurization or dry desulfurization technology to remove sulfur dioxide from flue gas.

3. The intelligent carbon capture and utilization method according to claim 2 is characterized in that: The default range is twice the boundary layer thickness of the fluid.

4. The intelligent carbon capture and utilization method according to claim 3 is characterized in that: The chemical absorbent uses KOH solution or NaOH solution.

5. The intelligent carbon capture and utilization method according to claim 4 is characterized in that: The specific steps of reducing the chemical absorbent with soluble salt are: reacting the soluble salt with Ca(OH)2 to generate calcium carbonate and alkali, and then obtaining the chemical absorbent by centrifugation and filtration.

6. The intelligent carbon capture and utilization method according to claim 5, characterized in that: The specific steps of releasing CO2 are: heating calcium carbonate to generate calcium oxide and CO2, and then mixing calcium oxide with water to react to prepare Ca(OH)2.

7. A carbon capture and utilization device, characterized in that: The invention comprises an absorption tower body (1); a first chamber (101) is arranged in the absorption tower body (1); at least one mixing component is arranged in the first chamber (101); the mixing component comprises a carrier (102); the carrier (102) is fixedly connected to the first chamber (101); a second chamber (6) is arranged in the carrier (102); a plurality of disks (7) are arranged in the second chamber (6); a plurality of circular holes (701) are circumferentially arranged at the axis of the disks (7); the disks (7) are spaced at a preset distance from each other; the disks (7) are coaxially fixedly connected, and the mixing component is arranged close to the first chamber (101); The discs (7) near the top and bottom of the second chamber (6) are rotatably connected to the second chamber (6); the second chamber (6) is respectively connected to a feed pipe (3) for conveying a chemical absorbent and an air intake pipe (2) for conveying flue gas; a plurality of conveying pipes (103) are also arranged in the absorption tower body (1); the conveying pipes (103) are respectively connected to the circular holes (701), and adjacent conveying pipes (103) are connected to each other. The conveying pipes (103) are used to discharge a product obtained by mixing the chemical absorbent and the flue gas out of the absorption tower body (1); the carrier (10 2) is also provided with a temperature control component; the temperature control component comprises a heat exchange tube (4), the heat exchange tube (4) is located in the side wall of the second chamber (6), a temperature difference power generation sheet (5) is also provided on one side of the heat exchange tube (4), and the temperature difference power generation sheet (5) is located between the heat exchange tube (4) and the second chamber (6); the temperature difference power generation sheet (5) is electrically connected to the control module; both ends of the heat exchange tube (4) are connected with a three-way tube (104), and a diverter valve (105) is provided at the three-way intersection in the three-way tube (104); the three-way tube (104) is respectively connected with a cold water tank (1 07) and an insulation box (108); a delivery pump (106) is provided between the three-way pipe (104) and the cold water tank (107) and between the three-way pipe (104) and the insulation box (108), and the delivery pump (106) is used to realize water circulation between the three-way pipe (104), the heat exchange pipe (4) and the cold water tank (107) and the insulation box (108); the control module is used to judge the temperature condition in the second chamber (6) based on the power generation condition of the temperature difference power generation sheet (5), and control the operation of the diverter valve (105) and the delivery pump (106).

8. The carbon capture and utilization device according to claim 7, characterized in that: The second chamber (6) is cylindrical in shape, and the air inlet pipe (2) and the feed pipe (3) are both arranged along the tangent direction of the second chamber (6).

9. A carbon capture and utilization control device, characterized in that: The method comprises a memory, a processor, and a program or instruction stored in the memory and executable on the processor; when the processor executes the program or instruction, the carbon capture and utilization method according to any one of claims 1 to 6 is implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the service control method according to any one of claims 1 to 2 is implemented.

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