Water balance dynamic control method, device and electronic equipment applied to carbon capture system

Abstract

The present disclosure relates to the field of carbon capture technology, and in particular to a method, device and electronic device for dynamic water balance control applied to a carbon capture system. The method comprises: determining the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system; controlling the water flow in the carbon capture system according to the water content difference to maintain the overall water content in the carbon capture system within a target water content range. The present disclosure using the above scheme can improve the water balance control effect, response speed and accuracy of the carbon capture system, and reduce the operating burden of the carbon capture system.

Description

Technical Field

[0001] The present disclosure relates to the technical field of carbon capture, and in particular to a method, device and electronic equipment for dynamic control of water balance applied to a carbon capture system. Background Art

[0002] Carbon Capture Utilization and Storage (CCUS) technology is a key technology to address climate change. It aims to capture carbon dioxide from industrial emission sources or the atmosphere and store it permanently underground through transportation, oil recovery or storage to reduce greenhouse gas emissions. In the carbon capture process, water balance control is an important link because the absorbent (such as amine solution) in the carbon capture system usually needs to maintain an appropriate water content to maintain its absorption efficiency.

[0003] At present, the water balance control of many carbon capture systems mainly relies on human experience. According to the actual situation of system operation and their own experience, operators control the water entering or leaving the carbon capture system by adjusting the flue gas washing or tail gas washing temperature, thereby controlling the water content of the solution. The problems with this method mainly include the following:

[0004] (1) High uncertainty: The experience and judgment ability of different operators vary greatly, resulting in inconsistent control effects.

[0005] (2) Response lag: Human control often cannot respond to changes in system parameters in a timely manner, resulting in control lag.

[0006] (3) Difficult to precisely control: Due to the lack of real-time feedback, it is difficult for human control to achieve precise adjustments, which may lead to decreased system performance or increased energy consumption.

[0007] (4) Heavy operating burden: Long-term reliance on manual adjustment increases the workload of operators, and the risk of misoperation is high under complex working conditions. Summary of the invention

[0008] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0009] To this end, the first objective of the present disclosure is to propose a water balance dynamic control method applied to a carbon capture system to improve the water balance control effect, response speed, and accuracy of the carbon capture system and reduce the operating burden of the carbon capture system.

[0010] A second objective of the present disclosure is to provide a water balance dynamic control device applied to a carbon capture system.

[0011] A third objective of the present disclosure is to provide an electronic device.

[0012] A fourth objective of the present disclosure is to provide a computer-readable storage medium.

[0013] A fifth object of the present disclosure is to provide a computer program product.

[0014] To achieve the above-mentioned purpose, the first embodiment of the present disclosure proposes a water balance dynamic control method applied to a carbon capture system, comprising:

[0015] Determine the difference in water content between the flue gas inlet and the flue gas outlet in a carbon capture system;

[0016] The water flow rate in the carbon capture system is controlled according to the water content difference to maintain the overall water content in the carbon capture system within a target water content range.

[0017] Optionally, determining the difference in water content between a flue gas inlet and a flue gas outlet in the carbon capture system comprises:

[0018] determining a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system;

[0019] The water content difference between the smoke inlet and the smoke outlet is determined according to the first water quality parameter and the second water quality parameter.

[0020] Optionally, determining a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in the carbon capture system comprises:

[0021] Determining a first flue gas flow rate, a first water volume content, and a first water density corresponding to a flue gas inlet in a carbon capture system, and determining a first water quality parameter at the flue gas inlet according to the first flue gas flow rate, the first water volume content, and the first water density;

[0022] Determine a second flue gas flow rate, a second water volume content and a second water density corresponding to a flue gas outlet in the carbon capture system, and determine a second water quality parameter at the flue gas outlet according to the second flue gas flow rate, the second water volume content and the second water density.

[0023] Optionally, controlling the water flow in the carbon capture system according to the water content difference includes:

[0024] determining a first water content change rate at the flue gas inlet according to the water content difference and the first water quality parameter, and controlling a water flow rate of a cooling water system in the carbon capture system according to the water content difference and the first water content change rate;

[0025] According to the water content difference and the second water quality parameter, a second water content change rate at the flue gas outlet is determined, and according to the water content difference and the second water content change rate, a water flow rate of an absorbent circulation system in the carbon capture system is controlled.

[0026] Optionally, controlling the water flow of a cooling water system in the carbon capture system according to the water content difference and the first water content change rate includes:

[0027] If the water content difference is greater than a first difference threshold, and the first water content change rate is less than a first change rate threshold, then increase the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet until the water content difference is not greater than the first difference threshold, and the first water content change rate is not less than the first change rate threshold;

[0028] If the first water content change rate is not less than a first change rate threshold, and the first water content change rate is less than a second change rate threshold, reducing the cooling water flow of the cooling water system in the carbon capture system, and adjusting the cooling water flow from the reflux replenishment pump in the carbon capture system to the flue gas outlet until the first water content change rate is less than the first change rate threshold;

[0029] If the first water content change rate is not less than the second change rate threshold, a first alarm message is issued, wherein the first alarm message is used to indicate that the cooling water system should be repaired.

[0030] Optionally, reducing the cooling water flow rate of a cooling water system in the carbon capture system comprises:

[0031] reducing the cooling water flow rate of the lean cooling exchange in the carbon capture system;

[0032] If the cooling water flow rate of the lean cooling exchange is less than a first cooling water flow rate threshold, reducing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system;

[0033] If the cooling water flow rate of the intercooler is less than a second cooling water flow rate threshold, reducing the cooling water flow rate of the recooler in the carbon capture system;

[0034] If the cooling water flow rate of the re-cooling exchange is less than the third cooling water flow rate threshold, the cooling water flow rate of the tail gas scrubbing exchange in the carbon capture system is reduced.

[0035] Optionally, controlling the water flow rate of the absorbent circulation system in the carbon capture system according to the water content difference and the second water content change rate comprises:

[0036] If the water content difference is less than the second difference threshold, and the second water content change rate is greater than the third change rate threshold, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet is reduced until the water content difference is not less than the second difference threshold, and the second water content change rate is not greater than the third change rate threshold;

[0037] If the second water content change rate is not greater than the third change rate threshold, and the second water content change rate is greater than a fourth change rate threshold, increasing the cooling water flow of the absorbent circulation system in the carbon capture system until the second water content change rate is greater than the third change rate threshold;

[0038] If the second water content change rate is not greater than the fourth change rate threshold, a second alarm message is issued, wherein the second alarm message is used to indicate that the absorbent circulation system should be overhauled.

[0039] Optionally, increasing the cooling water flow rate of the absorbent circulation system in the carbon capture system comprises:

[0040] Increasing the cooling water flow rate of tail gas scrubbing in the carbon capture system;

[0041] If the cooling water flow rate of the tail gas scrubber is greater than a fourth cooling water flow rate threshold, increasing the cooling water flow rate of the recooling in the carbon capture system;

[0042] If the cooling water flow rate of the re-cooling exchange is greater than a fifth cooling water flow rate threshold, increasing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system;

[0043] If the cooling water flow rate of the intermediate cooling exchange is greater than a sixth cooling water flow rate threshold, the cooling water flow rate of the lean cooling exchange in the carbon capture system is increased.

[0044] To achieve the above-mentioned purpose, the second embodiment of the present disclosure proposes a water balance dynamic control device applied to a carbon capture system, comprising:

[0045] a water content difference determination unit, used to determine the water content difference between a flue gas inlet and a flue gas outlet in a carbon capture system;

[0046] A water flow control unit is used to control the water flow in the carbon capture system according to the water content difference, so as to maintain the overall water content in the carbon capture system within a target water content range.

[0047] To achieve the above-mentioned purpose, a third aspect of the present disclosure provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0048] Memory stores computer-executable instructions;

[0049] The processor executes the computer-executable instructions stored in the memory to implement the method shown in any one of the first aspects above.

[0050] To achieve the above-mentioned objectives, an embodiment of the fourth aspect of the present disclosure proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the method shown in any one of the above-mentioned first aspects.

[0051] To achieve the above-mentioned objective, a fifth aspect of the present disclosure provides a computer program product, including a computer program, which, when executed by a processor, implements the method shown in any one of the above-mentioned first aspects.

[0052] In summary, the method, device, equipment and storage medium provided by the present disclosure control the water flow in the carbon capture system according to the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system, so as to maintain the overall water content in the carbon capture system within the target water content range. Therefore, it is possible to reduce manual intervention in the dynamic control process of water balance, reduce the workload of operators, and reduce errors caused by human factors, thereby improving the water balance control effect and accuracy of the carbon capture system, reducing the operating burden of the carbon capture system, and accurately controlling the water balance can reduce unnecessary water losses and reduce operating costs. Secondly, the water flow in the carbon capture system is automatically controlled, and the carbon capture system has a fast response speed, which can better cope with changes in operating conditions, ensure stable operation of the system, and improve the reliability of the carbon capture system.

[0053] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0055] Figure 1 A schematic flow chart of a method for dynamic water balance control applied to a carbon capture system provided by an embodiment of the present disclosure;

[0056] Figure 2 A structural schematic diagram of a carbon capture system provided by an embodiment of the present disclosure;

[0057] Figure 3 A schematic diagram of the structure of a water balance dynamic control device applied to a carbon capture system provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0058] Embodiments of the present disclosure are described in detail below, and examples of the embodiments 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 intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0059] The present disclosure is described in detail below with reference to specific embodiments.

[0060] In the first embodiment, if Figure 1 As shown, Figure 1 This is a flow chart of a method for dynamic water balance control applied to a carbon capture system provided by an embodiment of the present disclosure. The method can be implemented by a computer program and can be run on a device for dynamic water balance control applied to a carbon capture system. The computer program can be integrated into an application or run as an independent tool application.

[0061] The water balance dynamic control device applied to the carbon capture system may be an electronic device having a water balance dynamic control function applied to the carbon capture system.

[0062] The water balance dynamic control method applied to the carbon capture system can be executed by an electronic device.

[0063] For example, the water balance dynamic control method applied to the carbon capture system includes the following steps:

[0064] S101, determining a water content difference between a flue gas inlet and a flue gas outlet in a carbon capture system;

[0065] According to some embodiments, the water content refers to the moisture content in the flue gas.

[0066] In some embodiments, the difference in water content between the flue gas inlet and the flue gas outlet in the carbon capture system can be used to reflect the change in the overall water content in the carbon capture system.

[0067] For example, if the water content difference is greater than zero, it means that the water content at the flue gas inlet is greater than the water content at the flue gas outlet, and the overall water content in the carbon capture system has increased. If the water content difference is less than zero, it means that the water content at the flue gas inlet is less than the water content at the flue gas outlet, and the overall water content in the carbon capture system has decreased.

[0068] S102, controlling the water flow rate in the carbon capture system according to the water content difference, so as to maintain the overall water content in the carbon capture system within a target water content range.

[0069] According to some embodiments, the target water content range is not specifically a fixed range and can be adjusted according to actual application scenarios.

[0070] In summary, the method provided in this embodiment controls the water flow rate in the carbon capture system according to the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system, so as to maintain the overall water content in the carbon capture system within the target water content range. Therefore, it is possible to reduce manual intervention in the dynamic control process of water balance, reduce the workload of operators, and reduce errors caused by human factors, thereby improving the water balance control effect and accuracy of the carbon capture system, reducing the operating burden of the carbon capture system, and accurately controlling the water balance can reduce unnecessary water losses and reduce operating costs. Secondly, the water flow rate in the carbon capture system is automatically controlled, and the carbon capture system has a fast response speed, which can better cope with changes in operating conditions, ensure stable operation of the system, and improve the reliability of the carbon capture system.

[0071] This embodiment also provides another method for dynamic water balance control in a carbon capture system, which can be executed by an electronic device.

[0072] For example, the water balance dynamic control method applied to the carbon capture system may include the following steps:

[0073] S201, determining a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system;

[0074] According to some embodiments, the water quality parameter refers to the water content in the flue gas, and its unit may be kg, for example.

[0075] In some embodiments, the water quality parameter can be determined based on the flue gas flow rate, water volume content and water density. That is, the first flue gas flow rate, the first water volume content and the first water density corresponding to the flue gas inlet of the carbon capture system can be determined, and the first water quality parameter at the flue gas inlet can be determined based on the first flue gas flow rate, the first water volume content and the first water density; the second flue gas flow rate, the second water volume content and the second water density corresponding to the flue gas outlet of the carbon capture system can be determined, and the second water quality parameter at the flue gas outlet can be determined based on the second flue gas flow rate, the second water volume content and the second water density.

[0076] The flue gas flow rate refers to the flow rate of the flue gas, and its unit can be, for example, Nm 3 / h.

[0077] The water volume content refers to the volume content of water in the flue gas, and its unit may be %, for example.

[0078] The water density refers to the density of water in the flue gas, and its unit can be, for example, kg / Nm 3 .

[0079] S202, determining a water content difference between a smoke inlet and a smoke outlet according to the first water quality parameter and the second water quality parameter;

[0080] According to some embodiments, the water quality parameter may be, for example, the product of the flue gas flow rate, the water volume content, and the water density. That is, the water content difference may be determined according to the following formula:

[0081]

[0082] in, is the water content difference. It is the first water quality parameter. is the second water quality parameter. is the first flue gas flow rate. is the first water volume content. is the first water density. is the second flue gas flow rate. is the second water volume content. is the second water density.

[0083] It should be noted that the parameters obtained in the embodiments of the present disclosure, including flue gas flow, water volume content, and water density, can be obtained through a monitoring system provided in the carbon capture system. The monitoring system may include, for example, a sensor device and a monitoring device installed on each device in the carbon capture system.

[0084] S203, determining a first water content change rate at a flue gas inlet according to the water content difference and the first water quality parameter, and controlling a water flow rate of a cooling water system in the carbon capture system according to the water content difference and the first water content change rate;

[0085] According to some embodiments, a cooling water system is used to take care of cooling water circulation in the carbon capture system.

[0086] Take a scenario as an example. Figure 2 This is a schematic diagram of the structure of a carbon capture system provided by an embodiment of the present disclosure. Figure 2 As shown, the flue gas inlet is located at the lower part of the composite absorption tower, and the flue gas outlet is located at the top of the composite absorption tower. The cooling water in the cooling water system flows into the flue gas cooling exchanger, lean cooling exchanger, intercooler, exhaust gas washing exchanger, recooler and other heat exchangers respectively. After cooling the original flue gas, semi-rich liquid, clean flue gas, lean liquid, regenerated gas, etc., it flows to the natural ventilation cooling tower for cooling, thereby forming a cooling water cycle.

[0087] According to some embodiments, the water content change rate is used to reflect the change rate of the water content. The larger the absolute value of the water content change rate is, the faster the change rate of the water content is.

[0088] In some embodiments, the water content change rate may be, for example, the quotient of the water content difference and the water quality parameter. In other words, the first water content change rate may be the quotient of the water content difference and the first water quality parameter.

[0089] According to some embodiments, during the process of controlling the water flow of a cooling water system in a carbon capture system, if the water content difference is greater than a first difference threshold, and the first water content change rate is less than a first change rate threshold, the cooling water flow out of the flue gas cooler exchange flow at the flue gas inlet is increased until the water content difference is no greater than the first difference threshold, and the first water content change rate is no less than the first change rate threshold.

[0090] In some embodiments, the first difference threshold does not specifically refer to a fixed threshold. The first difference threshold can be determined according to the actual application scenario. For example, the first difference threshold can be 0, and the first difference threshold can also be 0.5.

[0091] In some embodiments, the first change rate threshold does not specifically refer to a fixed threshold. The first change rate threshold can be determined according to the actual application scenario. For example, the first change rate threshold can be 10%.

[0092] For example, if the water content difference is greater than 0, and If the water content difference is less than 10%, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet can be increased until the water content difference is Not greater than 0, and Not less than 10%.

[0093] It should be noted that when the water content difference is greater than the first difference threshold and the first water content change rate is less than the first change rate threshold, the water content at the flue gas inlet of the carbon capture system is greater than the water content at the flue gas outlet, and the overall water content in the carbon capture system has increased, but the growth rate is low. Therefore, only by increasing the cooling water flow rate of the flue gas cooler at the flue gas inlet to reduce the water content in the flue gas can the growth of the overall water content in the carbon capture system be effectively suppressed, and the overall water content in the carbon capture system can be maintained within the target water content range. The water balance control effect is good, the response speed is fast, and the accuracy is high. It can also reduce the operating burden of the carbon capture system.

[0094] According to some embodiments, during the process of controlling the water flow rate of the cooling water system in the carbon capture system, if the first water content change rate is not less than the first change rate threshold, and the first water content change rate is less than the second change rate threshold, the cooling water flow rates flowing into the lean cooling exchange, the intermediate cooling exchange, the re-cooling exchange, and the tail gas washing exchange are reduced in sequence, and the cooling water flow rate flowing from the reflux replenishment pump in the carbon capture system to the flue gas outlet is adjusted until the first water content change rate is less than the first change rate threshold.

[0095] In some embodiments, the second change rate threshold is greater than the first change rate threshold. The second change rate threshold does not specifically refer to a fixed threshold. The second change rate threshold can be determined according to the actual application scenario. For example, the second change rate threshold can be 50%.

[0096] For example, if 10%≤ <50%, reduce the cooling water flow of the cooling water system in the carbon capture system, and adjust the cooling water flow from the reflux replenishment pump in the carbon capture system to the flue gas outlet until Less than 10%.

[0097] It should be noted that, when the first water content change rate is not less than the first change rate threshold, and the first water content change rate is less than the second change rate threshold, the overall water content in the carbon capture system increases rapidly, and simply increasing the cooling water flow of the flue gas cooler at the flue gas inlet may not be able to suppress the growth trend of the overall water content in the carbon capture system. Therefore, it is necessary to further reduce the overall water content in the carbon capture system on the basis of increasing the cooling water flow out of the flue gas cooler at the flue gas inlet.

[0098] Among them, when further reducing the overall water content in the carbon capture system on the basis of increasing the cooling water flow rate of the flue gas cooler exchange flow at the flue gas inlet, first, the cooling water flow rate of the flue gas cooler exchange flow when the first water content change rate is equal to the first change rate threshold can be determined; then, the overall water content in the carbon capture system can be further reduced on the basis of keeping the cooling water flow rate unchanged, or the overall water content in the carbon capture system can be further reduced on the basis of continuing to increase the cooling water flow rate of the flue gas cooler exchange flow.

[0099] In some embodiments, the amount of water evaporation in the carbon capture system can be increased by reducing the cooling water flow rate of the cooling water system in the carbon capture system, thereby reducing the overall water content in the carbon capture system. The overall water content in the carbon capture system can also be reduced by adjusting the cooling water flow rate from the reflux replenishment pump of the recooling exchange in the carbon capture system to the flue gas inlet. Therefore, the growth of the overall water content in the carbon capture system can be further suppressed on the basis of increasing the cooling water flow rate of the flue gas recooling exchange at the flue gas inlet.

[0100] In some embodiments, in the process of adjusting the cooling water flow rate of the reflow replenishment pump of the carbon capture system flowing into the flue gas inlet to reduce the overall water content in the carbon capture system, the standard value of the cooling water flow rate of the reflow replenishment pump flowing into the flue gas inlet can be determined, and according to the standard value and the actual value of the cooling water flow rate of the reflow replenishment pump flowing into the flue gas inlet, the cooling water flow rate of the reflow replenishment pump flowing into the flue gas inlet is negatively feedback controlled, thereby reducing the overall water content in the carbon capture system. Therefore, the control accuracy of the cooling water flow rate of the reflow replenishment pump flowing into the flue gas inlet can be improved.

[0101] According to some embodiments, in the process of reducing the cooling water flow rate of the cooling water system in the carbon capture system, the cooling water flow rates of the lean cooling exchange, the intermediate cooling exchange, the re-cooling exchange, and the tail gas washing exchange in the carbon capture system can be reduced in sequence until the first water content change rate is less than the first change rate threshold.

[0102] That is to say, first, the cooling water flow rate of the lean cooling exchange in the carbon capture system can be reduced; if the cooling water flow rate of the lean cooling exchange is less than the first cooling water flow rate threshold, the cooling water flow rate of the intermediate cooling exchange in the carbon capture system is reduced. Next, if the cooling water flow rate of the intermediate cooling exchange is less than the second cooling water flow rate threshold, the cooling water flow rate of the re-cooling exchange in the carbon capture system is reduced. Finally, if the cooling water flow rate of the re-cooling exchange is less than the third cooling water flow rate threshold, the cooling water flow rate of the tail gas scrubber exchange in the carbon capture system is reduced.

[0103] In some embodiments, the first cooling water flow threshold, the second cooling water flow threshold, and the third cooling water flow threshold do not specifically refer to a fixed threshold, and the thresholds can be adjusted according to actual application scenarios.

[0104] According to some embodiments, during the process of controlling the water flow of a cooling water system in a carbon capture system, if a first water content change rate is not less than a second change rate threshold, a first warning message is issued.

[0105] In some embodiments, the first alarm information is used to indicate that the cooling water system should be inspected and repaired.

[0106] It should be noted that when the first water content change rate is not less than the second change rate threshold, it indicates that a problem occurs in the cooling water system of the carbon capture system and the system needs to be stopped for maintenance.

[0107] For example, if >50%, a first alarm message is issued to allow staff to stop the cooling water system for maintenance.

[0108] S204, determining a second water content change rate at the flue gas outlet according to the water content difference and the second water quality parameter, and controlling the water flow rate of the absorbent circulation system in the carbon capture system according to the water content difference and the second water content change rate.

[0109] According to some embodiments, an absorbent circulation system is used to take care of absorbent circulation in a carbon capture system.

[0110] Take a scenario as an example, Figure 2 As shown, in the absorbent circulation system, the absorbent flows through the absorption tower, the rich liquid pump, the lean rich liquid, the regeneration tower, the reboiler, the lean liquid pump, the lean cold exchanger, and the absorption tower in sequence, thereby forming an absorbent circulation.

[0111] In some embodiments, the second water content change rate may be, for example, the quotient of the water content difference and the second water quality parameter.

[0112] According to some embodiments, during the process of controlling the water flow rate of the absorbent circulation system in the carbon capture system, if the water content difference is less than the second difference threshold value, and the second water content change rate is greater than the third change rate threshold value, the cooling water flow rate out of the flue gas cooling exchange flow at the flue gas inlet is reduced until the water content difference is not less than the second difference threshold value, and the second water content change rate is not greater than the third change rate threshold value.

[0113] In some embodiments, the second difference threshold does not specifically refer to a fixed threshold. The second difference threshold can be determined according to the actual application scenario. For example, the second difference threshold can be 0, and the second difference threshold can also be -0.5.

[0114] In some embodiments, the third change rate threshold does not specifically refer to a fixed threshold. The third change rate threshold can be determined according to the actual application scenario. For example, the third change rate threshold can be -10%.

[0115] For example, if the water content difference is less than 0, and If the water content difference is greater than -10%, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet can be reduced until the water content difference is is not less than 0, and Greater than -10%.

[0116] It should be noted that, when the water content difference is greater than the first difference threshold, and the first water content change rate is less than the first change rate threshold, the water content at the flue gas inlet of the carbon capture system is less than the water content at the flue gas outlet, and the overall water content in the carbon capture system decreases, but the rate of decrease is slow. Therefore, only by reducing the cooling water flow rate of the flue gas cooling exchange flow at the flue gas inlet to increase the water content at the flue gas outlet, it is possible to effectively suppress the reduction of the overall water content in the carbon capture system and achieve the effect of maintaining the overall water content in the carbon capture system within the target water content range, and the water balance control effect is good, the response speed is fast, the accuracy is high, and the operating burden of the carbon capture system can be reduced.

[0117] According to some embodiments, during the process of controlling the water flow rate of the absorbent circulation system in the carbon capture system, if the second water content change rate is not greater than the third change rate threshold, and the second water content change rate is greater than the fourth change rate threshold, the cooling water flow rate of the absorbent circulation system in the carbon capture system is increased until the second water content change rate is greater than the third change rate threshold.

[0118] In some embodiments, the fourth change rate threshold is less than the third change rate threshold. The fourth change rate threshold does not specifically refer to a fixed threshold. The fourth change rate threshold can be determined according to an actual application scenario. For example, the fourth change rate threshold can be -50%.

[0119] For example, if -50%≤ <-10%, increase the cooling water flow rate of the absorbent circulation system in the carbon capture system, and adjust the cooling water flow rate from the tail gas scrubber pump in the carbon capture system to the flue gas outlet until Greater than -10%.

[0120] It should be noted that when the second water content change rate is not greater than the third change rate threshold, and the second water content change rate is greater than the fourth change rate threshold, the overall water content in the carbon capture system decreases rapidly, and simply reducing the cooling water flow of the flue gas cooler at the flue gas inlet may not be able to suppress the downward trend of the overall water content in the carbon capture system. Therefore, it is necessary to further increase the overall water content in the carbon capture system on the basis of reducing the cooling water flow of the flue gas cooler at the flue gas outlet.

[0121] Among them, when further increasing the overall water content in the carbon capture system on the basis of reducing the cooling water flow rate of the flue gas cooler at the flue gas inlet, first, the cooling water flow rate of the flue gas cooler when the second water content change rate is equal to the third change rate threshold can be determined; then, the overall water content in the carbon capture system can be further increased on the basis of keeping the cooling water flow rate unchanged, or the overall water content in the carbon capture system can be further increased on the basis of continuing to reduce the cooling water flow rate of the flue gas cooler.

[0122] In some embodiments, the amount of water evaporation in the carbon capture system can be reduced by increasing the cooling water flow rate of the absorbent circulation system in the carbon capture system, thereby increasing the overall water content in the carbon capture system. The water content of the absorbent in the carbon capture system can also be increased by adjusting the flow rate of the reflux replenishment pump in the carbon capture system. Therefore, the decrease in the overall water content in the carbon capture system can be further suppressed on the basis of reducing the cooling water flow rate of the flue gas cooling exchange flow at the flue gas inlet.

[0123] According to some embodiments, in the process of increasing the cooling water flow rate of the absorbent circulation system in the carbon capture system, the cooling water flow rates of the tail gas scrubbing exchange, re-cooling exchange, inter-cooling exchange, and lean cooling exchange in the carbon capture system can be increased in sequence until the second water content change rate is greater than the third change rate threshold.

[0124] That is to say, first, the cooling water flow rate of the tail gas washing exchange in the carbon capture system can be increased; if the cooling water flow rate of the tail gas washing exchange is greater than the fourth cooling water flow rate threshold, the cooling water flow rate of the re-cooling exchange in the carbon capture system is increased. Next, if the cooling water flow rate of the re-cooling exchange is greater than the fifth cooling water flow rate threshold, the cooling water flow rate of the intermediate cooling exchange in the carbon capture system is increased. Finally, if the cooling water flow rate of the intermediate cooling exchange is greater than the sixth cooling water flow rate threshold, the cooling water flow rate of the lean cooling exchange in the carbon capture system is increased.

[0125] In some embodiments, the fourth cooling water flow threshold, the fifth cooling water flow threshold, and the sixth cooling water flow threshold do not specifically refer to a fixed threshold, and the thresholds can be adjusted according to actual application scenarios.

[0126] According to some embodiments, during the process of controlling the water flow of the absorbent circulation system in the carbon capture system, if the second water content change rate is not greater than a fourth change rate threshold, a second warning message is issued.

[0127] In some embodiments, the second warning information is used to instruct to perform maintenance on the absorbent circulation system.

[0128] It should be noted that when the second water content change rate is not greater than the fourth change rate threshold, it indicates that a problem occurs in the absorbent circulation system of the carbon capture system and the system needs to be stopped for maintenance.

[0129] For example, if <-50%, a second alarm message is issued to allow staff to stop the absorbent circulation system for maintenance.

[0130] In summary, the method provided in this embodiment first determines the first water quality parameter at the flue gas inlet and the second water quality parameter at the flue gas outlet in the carbon capture system; determines the water content difference between the flue gas inlet and the flue gas outlet according to the first water quality parameter and the second water quality parameter; therefore, the accuracy of determining the water content difference can be improved. Then, the first water content change rate at the flue gas inlet is determined according to the water content difference and the first water quality parameter, and the water flow rate of the cooling water system in the carbon capture system is controlled according to the water content difference and the first water content change rate; determines the second water content change rate at the flue gas outlet according to the water content difference and the second water quality parameter, and controls the water flow rate of the absorbent circulation system in the carbon capture system according to the water content difference and the second water content change rate; therefore, the effect and accuracy of dynamic control of water balance in the carbon capture system can be improved. Secondly, by introducing negative feedback control in the process of controlling the water flow of the cooling water system and the absorbent circulation system in the carbon capture system, the control accuracy can be improved, and the water flow can be adjusted in real time to ensure that the overall water content in the carbon capture system is always maintained in the optimal range, thereby improving the absorption efficiency of the absorbent.

[0131] In order to implement the above embodiments, the present disclosure also proposes a water balance dynamic control device applied to a carbon capture system.

[0132] like Figure 3 As shown, the water balance dynamic control device 300 applied to the carbon capture system includes:

[0133] A water content difference determination unit 301, used to determine the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system;

[0134] The water flow control unit 302 is used to control the water flow in the carbon capture system according to the water content difference, so as to maintain the overall water content in the carbon capture system within a target water content range.

[0135] Optionally, when the water content difference determination unit 301 is used to determine the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system, it is specifically used to:

[0136] determining a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system;

[0137] The water content difference between the smoke inlet and the smoke outlet is determined according to the first water quality parameter and the second water quality parameter.

[0138] Optionally, when the water content difference determination unit 301 is used to determine a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system, it is specifically used to:

[0139] Determine a first flue gas flow rate, a first water volume content, and a first water density corresponding to a flue gas inlet in the carbon capture system, and determine a first water quality parameter at the flue gas inlet according to the first flue gas flow rate, the first water volume content, and the first water density;

[0140] Determine a second flue gas flow rate, a second water volume content and a second water density corresponding to a flue gas outlet in the carbon capture system, and determine a second water quality parameter at the flue gas outlet according to the second flue gas flow rate, the second water volume content and the second water density.

[0141] Optionally, when the water flow control unit 302 is used to control the water flow in the carbon capture system according to the water content difference, it is specifically used to:

[0142] determining a first water content change rate at a flue gas inlet according to the water content difference and the first water quality parameter, and controlling a water flow rate of a cooling water system in the carbon capture system according to the water content difference and the first water content change rate;

[0143] The second water content change rate at the flue gas outlet is determined according to the water content difference and the second water quality parameter, and the water flow rate of the absorbent circulation system in the carbon capture system is controlled according to the water content difference and the second water content change rate.

[0144] Optionally, when the water flow control unit 302 is used to control the water flow of the cooling water system in the carbon capture system according to the water content difference and the first water content change rate, it is specifically used to:

[0145] If the water content difference is greater than the first difference threshold, and the first water content change rate is less than the first change rate threshold, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet is increased until the water content difference is not greater than the first difference threshold, and the first water content change rate is not less than the first change rate threshold;

[0146] If the first water content change rate is not less than the first change rate threshold, and the first water content change rate is less than the second change rate threshold, reducing the cooling water flow of the cooling water system in the carbon capture system, and adjusting the cooling water flow from the reflux replenishment pump in the carbon capture system to the flue gas outlet until the first water content change rate is less than the first change rate threshold;

[0147] If the first water content change rate is not less than the second change rate threshold, a first alarm message is issued, wherein the first alarm message is used to indicate that the cooling water system should be repaired.

[0148] Optionally, when the water flow control unit 302 is used to reduce the cooling water flow of the cooling water system in the carbon capture system, it is specifically used to:

[0149] Reduce the cooling water flow rate of lean cooling exchange in carbon capture system;

[0150] If the cooling water flow rate of the lean cooling exchange is less than the first cooling water flow rate threshold, reducing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system;

[0151] If the cooling water flow rate of the intercooler is less than the second cooling water flow rate threshold, reducing the cooling water flow rate of the recooler in the carbon capture system;

[0152] If the cooling water flow rate of the re-cooling exchange is less than the third cooling water flow rate threshold, the cooling water flow rate of the tail gas scrubbing exchange in the carbon capture system is reduced.

[0153] Optionally, when the water flow control unit 302 is used to control the water flow of the absorbent circulation system in the carbon capture system according to the water content difference and the second water content change rate, it is specifically used to:

[0154] If the water content difference is less than the second difference threshold, and the second water content change rate is greater than the third change rate threshold, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet is reduced until the water content difference is not less than the second difference threshold, and the second water content change rate is not greater than the third change rate threshold;

[0155] If the second water content change rate is not greater than the third change rate threshold, and the second water content change rate is greater than the fourth change rate threshold, increasing the cooling water flow of the absorbent circulation system in the carbon capture system until the second water content change rate is greater than the third change rate threshold;

[0156] If the second water content change rate is not greater than the fourth change rate threshold, a second alarm message is issued, wherein the second alarm message is used to instruct to overhaul the absorbent circulation system.

[0157] Optionally, when the water flow control unit 302 is used to increase the cooling water flow of the absorbent circulation system in the carbon capture system, it is specifically used to:

[0158] Increase the cooling water flow rate of tail gas scrubbing in the carbon capture system;

[0159] If the cooling water flow rate of the tail gas scrubber is greater than the fourth cooling water flow rate threshold, the cooling water flow rate of the recooling in the carbon capture system is increased;

[0160] If the cooling water flow rate of the recooling exchange is greater than the fifth cooling water flow rate threshold, increasing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system;

[0161] If the cooling water flow rate of the intermediate cooling exchange is greater than the sixth cooling water flow rate threshold, the cooling water flow rate of the lean cooling exchange in the carbon capture system is increased.

[0162] It should be noted that the above explanation of the embodiment of the water balance dynamic control method applied to the carbon capture system is also applicable to the water balance dynamic control device applied to the carbon capture system of this embodiment, which will not be repeated here.

[0163] In summary, the device provided in the embodiment of the present disclosure controls the water flow in the carbon capture system according to the water content difference between the flue gas inlet and the flue gas outlet in the carbon capture system, so as to maintain the overall water content in the carbon capture system within the target water content range. Therefore, it is possible to reduce manual intervention in the dynamic control process of water balance, reduce the workload of operators, and reduce errors caused by human factors, thereby improving the water balance control effect and accuracy of the carbon capture system, reducing the operating burden of the carbon capture system, and accurately controlling the water balance can reduce unnecessary water losses and reduce operating costs. Secondly, the water flow in the carbon capture system is automatically controlled, and the carbon capture system has a fast response speed, which can better cope with changes in operating conditions, ensure stable operation of the system, and improve the reliability of the carbon capture system.

[0164] In order to implement the above embodiments, the present disclosure also proposes an electronic device, including: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method provided by the above embodiments.

[0165] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods provided by the above embodiments.

[0166] In order to implement the above embodiments, the present disclosure also proposes a computer program product, including a computer program, which implements the methods provided by the above embodiments when executed by a processor.

[0167] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this disclosure shall comply with the relevant laws and regulations and shall not violate public order and good morals.

[0168] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0169] The present disclosure anticipates providing implementation schemes for users to selectively block the use or access of personal information data. That is, the present disclosure anticipates providing hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, risks can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0170] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they contradict each other.

[0171] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0172] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present disclosure belong.

[0173] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0174] It should be understood that the various parts of the present disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0175] A person skilled in the art may understand that all or part of the steps in the above-mentioned embodiment method may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0176] In addition, each functional unit in each embodiment of the present disclosure may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0177] The storage medium mentioned above may be a read-only memory, a disk or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present disclosure. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present disclosure.

Claims

1. A water balance dynamic control method for a carbon capture system, characterized in that: include: Determine the difference in water content between the flue gas inlet and the flue gas outlet in a carbon capture system; controlling the water flow in the carbon capture system according to the water content difference to maintain the overall water content in the carbon capture system within a target water content range; The determining of the difference in water content between a flue gas inlet and a flue gas outlet in the carbon capture system comprises: determining a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system; determining a water content difference between the smoke inlet and the smoke outlet according to the first water quality parameter and the second water quality parameter; The determining of a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system comprises: Determining a first flue gas flow rate, a first water volume content, and a first water density corresponding to a flue gas inlet in a carbon capture system, and determining a first water quality parameter at the flue gas inlet according to the first flue gas flow rate, the first water volume content, and the first water density; Determining a second flue gas flow rate, a second water volume content, and a second water density corresponding to a flue gas outlet in the carbon capture system, and determining a second water quality parameter at the flue gas outlet according to the second flue gas flow rate, the second water volume content, and the second water density; The controlling the water flow in the carbon capture system according to the water content difference comprises: determining a first water content change rate at the flue gas inlet according to the water content difference and the first water quality parameter, and controlling a water flow rate of a cooling water system in the carbon capture system according to the water content difference and the first water content change rate; According to the water content difference and the second water quality parameter, a second water content change rate at the flue gas outlet is determined, and according to the water content difference and the second water content change rate, a water flow rate of an absorbent circulation system in the carbon capture system is controlled.

2. The method according to claim 1, characterized in that The controlling of the water flow rate of the cooling water system in the carbon capture system according to the water content difference and the first water content change rate comprises: If the water content difference is greater than a first difference threshold, and the first water content change rate is less than a first change rate threshold, then increase the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet until the water content difference is not greater than the first difference threshold, and the first water content change rate is not less than the first change rate threshold; If the first water content change rate is not less than a first change rate threshold, and the first water content change rate is less than a second change rate threshold, reducing the cooling water flow of the cooling water system in the carbon capture system, and adjusting the cooling water flow from the reflux replenishment pump in the carbon capture system to the flue gas inlet until the first water content change rate is less than the first change rate threshold; If the first water content change rate is not less than the second change rate threshold, a first alarm message is issued, wherein the first alarm message is used to indicate that the cooling water system should be repaired.

3. The method according to claim 2, characterized in that The reducing the cooling water flow rate of the cooling water system in the carbon capture system comprises: reducing the cooling water flow rate of the lean cooling exchange in the carbon capture system; If the cooling water flow rate of the lean cooling exchange is less than a first cooling water flow rate threshold, reducing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system; If the cooling water flow rate of the intercooler is less than a second cooling water flow rate threshold, reducing the cooling water flow rate of the recooler in the carbon capture system; If the cooling water flow rate of the re-cooling exchange is less than the third cooling water flow rate threshold, the cooling water flow rate of the tail gas scrubbing exchange in the carbon capture system is reduced.

4. The method according to claim 3, characterized in that The controlling of the water flow rate of the absorbent circulation system in the carbon capture system according to the water content difference and the second water content change rate comprises: If the water content difference is less than the second difference threshold, and the second water content change rate is greater than the third change rate threshold, the cooling water flow rate of the smoke cooling exchange flow at the smoke inlet is reduced until the water content difference is not less than the second difference threshold, and the second water content change rate is not greater than the third change rate threshold; If the second water content change rate is not greater than the third change rate threshold, and the second water content change rate is greater than a fourth change rate threshold, increasing the cooling water flow of the absorbent circulation system in the carbon capture system until the second water content change rate is greater than the third change rate threshold; If the second water content change rate is not greater than the fourth change rate threshold, a second alarm message is issued, wherein the second alarm message is used to indicate that the absorbent circulation system should be overhauled.

5. The method according to claim 4, characterized in that The step of increasing the cooling water flow rate of the absorbent circulation system in the carbon capture system comprises: Increasing the cooling water flow rate of tail gas scrubbing in the carbon capture system; If the cooling water flow rate of the tail gas scrubber is greater than a fourth cooling water flow rate threshold, increasing the cooling water flow rate of the recooling in the carbon capture system; If the cooling water flow rate of the re-cooling exchange is greater than a fifth cooling water flow rate threshold, increasing the cooling water flow rate of the intermediate cooling exchange in the carbon capture system; If the cooling water flow rate of the intermediate cooling exchange is greater than a sixth cooling water flow rate threshold, the cooling water flow rate of the lean cooling exchange in the carbon capture system is increased.

6. A water balance dynamic control device for a carbon capture system, characterized in that: include: a water content difference determination unit, used to determine the water content difference between a flue gas inlet and a flue gas outlet in a carbon capture system; a water flow control unit, configured to control the water flow in the carbon capture system according to the water content difference, so as to maintain the overall water content in the carbon capture system within a target water content range; The water content difference determination unit is used to determine a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system; determining a water content difference between the smoke inlet and the smoke outlet according to the first water quality parameter and the second water quality parameter; The determining of a first water quality parameter at a flue gas inlet and a second water quality parameter at a flue gas outlet in a carbon capture system comprises: Determining a first flue gas flow rate, a first water volume content, and a first water density corresponding to a flue gas inlet in a carbon capture system, and determining a first water quality parameter at the flue gas inlet according to the first flue gas flow rate, the first water volume content, and the first water density; Determining a second flue gas flow rate, a second water volume content, and a second water density corresponding to a flue gas outlet in the carbon capture system, and determining a second water quality parameter at the flue gas outlet according to the second flue gas flow rate, the second water volume content, and the second water density; The water flow control unit is used to determine a first water content change rate at the flue gas inlet according to the water content difference and the first water quality parameter, and to control the water flow of the cooling water system in the carbon capture system according to the water content difference and the first water content change rate; According to the water content difference and the second water quality parameter, a second water content change rate at the flue gas outlet is determined, and according to the water content difference and the second water content change rate, a water flow rate of an absorbent circulation system in the carbon capture system is controlled.

7. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 5.

Images