Steam generation system based on solid heat storage and fused salt heating and control method thereof

Abstract

The embodiment of the invention provides a steam generation system based on solid heat storage and fused salt heating and a control method of the steam generation system, and belongs to the technical field of oil exploitation equipment. The system comprises a preheating device connected with the water supply device and used for preheating softened water; the steam generating device is connected to the outlet end of the preheating device and is used for performing multi-stage evaporation on the preheated softened water so as to obtain wet saturated steam for steam injection; wherein the steam generation device and the fused salt heat storage device are correspondingly arranged, and the steam generation device executes heat exchange with high-temperature fused salt in the fused salt heat storage device so as to obtain wet saturated steam used for steam injection; and the control device is used for generating a linkage control scheme of the water supply device, the preheating device and the steam generation device based on the real-time steam injection requirement. According to the scheme, the problems of slow starting response and poor linkage in the prior art are solved, and the operation efficiency and energy efficiency of the steam generation system are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production equipment, and in particular to a steam generation system based on solid heat storage and molten salt heating and a control method for the steam generation system based on solid heat storage and molten salt heating. Background Art

[0002] Heavy oil thermal recovery technology is an important means of oilfield exploitation. Among them, the wet saturated steam injection system, as a key equipment for heavy oil extraction, needs to meet the needs of efficient steam generation and low-carbon operation. However, traditional steam generation systems usually rely on gas boilers, which have problems such as high energy consumption, large carbon emissions, and slow equipment startup response, and it is difficult to meet the current requirements of energy conservation, emission reduction and efficient operation. In the context of the dual carbon goals, steam generation systems based on electric thermal energy have gradually received attention. Although the existing steam generation system based on molten salt heat storage has the advantage of using electricity to achieve efficient heat storage, it has the following shortcomings under complex steam injection requirements: 1) Slow startup response and poor operational adjustment flexibility: Existing systems usually use only molten salt as a single heat source for steam generation. During the molten salt heating process, it is necessary to wait until it reaches a high temperature before effective heat exchange can be performed, resulting in a long system startup response time. In addition, the system usually preheats the softened water through steam reflux, which increases the complexity of the steam pipeline and heat energy loss, and at the same time puts higher requirements on the scale of pumps and pipeline equipment, resulting in increased energy consumption.

[0003] 2) Lack of dynamic linkage control and inability to meet real-time needs: Traditional systems usually operate according to fixed process flows and lack the ability to make linkage adjustments based on real-time steam injection needs. When the steam injection demand changes, there is a lack of effective linkage control between the water supply, preheating and steam generation devices, making it difficult to quickly adjust the heating load and steam output parameters, resulting in energy waste and reduced operating efficiency.

[0004] In view of the above problems, a new steam generation system is proposed. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a steam generation system based on solid thermal storage and molten salt heating, so as to at least solve the problems of slow response speed and poor joint control performance existing in the existing steam generation system.

[0006] In order to achieve the above-mentioned objectives, the first aspect of the present invention provides a steam generation system based on solid heat storage and molten salt heating, the system comprising: a water supply device for supplying softened water; a preheating device connected to the water supply device for preheating softened water; wherein the preheating device is arranged in correspondence with the solid heat storage device, and the preheating device is based on heat exchange with the solid heat storage device to preheat the softened water; a steam generating device connected to the outlet end of the preheating device, for performing multi-stage evaporation on the preheated softened water to obtain wet saturated steam for steam injection; wherein the steam generating device is arranged in correspondence with the molten salt heat storage device, and the steam generating device is based on heat exchange with the high-temperature molten salt in the molten salt heat storage device to obtain wet saturated steam for steam injection; a control device for generating a linkage control scheme for the water supply device, the preheating device and the steam generating device based on real-time steam injection demand.

[0007] Optionally, the water supply device includes: a softened water tank for storing softened water; and a plunger pump connected to the outlet side of the softened water tank via a pipeline, for pressurizing the softened water when supplying softened water to the preheating device, thereby supplying water in a high-pressure state.

[0008] Optionally, the solid heat storage device is provided with one or a plurality of solid heat storage devices arranged in stages; a temperature sensor is provided at the outlet end of the preheating device for collecting the real-time temperature of the output softened water; the control module is also used to determine whether the real-time temperature of the output softened water of the preheating device meets the required temperature of the steam generating device.

[0009] Optionally, the solid heat storage device includes a circulation pipeline; when the real-time temperature of the softened water output by the preheating device does not meet the required temperature of the steam generating device, the softened water output by the preheating device flows back to the inlet of the preheating device based on the circulation pipeline, and secondary preheating is performed until the real-time temperature of the softened water output by the preheating device meets the required temperature of the steam generating device, and the circulation pipeline is closed.

[0010] Optionally, the control device is configured to: collect the current storage capacity of the steam injection well, system operating status parameters and historical steam injection data of the steam injection well in real time as prediction basic data; perform steam injection demand prediction at a predetermined time in the future based on the long short-term memory network and the prediction basic data; based on the predicted value of the steam injection demand, respectively determine the operating parameters of the water supply device, preheating device and steam generating device; and generate a corresponding joint control scheme based on the determined operating parameters of the water supply device, preheating device and steam generating device.

[0011] Optionally, the rule for performing steam injection demand forecasting at a predetermined time in the future based on the long short-term memory network and the forecast basic data is:

[0012] in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The method further comprises: determining the steam injection demand at a predetermined future time and the storage capacity of the current steam injection well based on the steam injection demand at the predetermined future time.

[0013] Optionally, the operating parameters of the water supply device are determined by: based on the steam injection demand at a predetermined time in the future and the operating efficiency of the current system, the target water supply volume that meets the corresponding steam injection demand is determined, and the determination rule is:

[0014] in, Target water supply; The operating efficiency of the current system; based on the determined target water supply and the time interval between the future scheduled time and the current time, the minimum operating power of the water supply device is determined as the operating parameter of the water supply device.

[0015] Optionally, the operating parameters of the preheating device are determined by: determining the target water supply temperature based on the saturated temperature of the steam required for the steam injection demand at a predetermined time in the future and the heat exchange efficiency of the steam generating device; and determining the target preheating heat based on the target water supply temperature and the current water supply temperature, and the determination rule is:

[0016] in, Preheat the heat for the target; Target water supply; is the specific heat capacity of softened water; and are the target temperature and the current water supply temperature respectively; based on the determined target preheating heat and the time interval between the future scheduled moment and the current moment, the minimum operating power of the preheating device is determined as the operating parameter of the preheating device.

[0017] Optionally, the operating parameters of the steam generating device are determined by: determining the target steam generation heat based on the steam injection demand at a predetermined time in the future and the steam vaporization latent heat of the steam generating device, and the determination rule is:

[0018] in, Generate heat for target steam; is the latent heat of steam vaporization of the steam generating device; determines the molten salt circulation flow rate based on the target steam generation heat; determines the minimum operating power of the steam generating device based on the target steam generation heat and the molten salt circulation flow rate, and the time interval between the future scheduled moment and the current moment, as the operating parameter of the preheating device.

[0019] Optionally, the rule for determining the molten salt circulation flow rate based on the target steam generation heat is:

[0020] in, is the molten salt circulation flow rate; is the specific heat capacity of the molten salt; and are the temperatures of hot and cold salt, respectively.

[0021] Optionally, a corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device, including: performing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device and the minimum operating power of the steam generating device; randomly adjusting the operating power of an operating device, and updating the operating powers of the other two operating devices based on the adjusted operating power, and calculating the function value of a pre-constructed objective function after the adjustment; updating the operating power of each operating device based on the function value until the function value of the objective function meets the iteration termination condition or reaches a preset number of iterations, and outputting the operating power of each operating device under the optimal state; generating a corresponding joint control scheme based on the operating power of each operating device under the optimal state, and the current operating power of each operating device.

[0022] Optionally, the pre-built objective function is:

[0023] in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

[0024] Optionally, the corresponding joint control scheme is generated based on the operating power of each operating device in the optimal state and the current operating power of each operating device, including: determining the power to be adjusted based on the operating power of each operating device in the optimal state and the current operating power of each operating device; decoupling the power to be adjusted to obtain the amount to be adjusted of each executing component to determine the adjustment scheme of each component; and combining the adjustment schemes of all components to obtain the joint control scheme.

[0025] Optionally, the system also includes: a pressure relief device, used to release the air pressure in the outlet side pipeline of the preheating device when the steam supply is stopped; the pressure relief device is connected to the water supply pipeline between the preheating device and the steam generating device through a three-way valve; the pressure relief device includes a discharge expansion tank, which is used to store the high-pressure softened water introduced during the pressure relief process.

[0026] Optionally, the control device is further used to control the valve on the discharge expansion tank side of the three-way valve to open in response to a pressure relief request instruction.

[0027] A second aspect of the present invention provides a method for controlling a steam generation system based on solid heat storage and molten salt heating, and the method is applied to the above-mentioned steam generation system based on solid heat storage and molten salt heating, and the method includes: real-time collection of the current storage capacity of the steam injection well, system operating status parameters and historical steam injection data as prediction basic data; performing steam injection demand prediction at a predetermined time in the future based on a long short-term memory network and the prediction basic data; based on the predicted value of the steam injection demand, respectively performing operating parameter determination of a water supply device, a preheating device and a steam generation device; and generating a corresponding joint control scheme based on the determined operating parameters of the water supply device, the preheating device and the steam generation device.

[0028] Optionally, the rule for performing steam injection demand forecasting at a predetermined time in the future based on the long short-term memory network and the forecast basic data is:

[0029] in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The method further comprises: determining the steam injection demand at a predetermined future time and the storage capacity of the current steam injection well based on the steam injection demand at the predetermined future time.

[0030] Optionally, a corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device, including: performing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device and the minimum operating power of the steam generating device; randomly adjusting the operating power of an operating device, and updating the operating powers of the other two operating devices based on the adjusted operating power, and calculating the function value of a pre-constructed objective function after the adjustment; updating the operating power of each operating device based on the function value until the function value of the objective function meets the iteration termination condition or reaches a preset number of iterations, and outputting the operating power of each operating device under the optimal state; generating a corresponding joint control scheme based on the operating power of each operating device under the optimal state, and the current operating power of each operating device.

[0031] Optionally, the pre-built objective function is:

[0032] in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

[0033] On the other hand, the present invention provides a computer-readable storage medium having instructions stored thereon, which, when executed on a computer, enables the computer to execute the above-mentioned steam generation system control method based on solid thermal storage and molten salt heating.

[0034] Through the above technical scheme, the scheme of the present invention combines a solid heat storage device with a preheating device, and uses the stable heat provided by the solid heat storage device to efficiently preheat the softened water, thereby shortening the system startup time and reducing the energy waste during the preheating process. At the same time, the steam generation device is linked with the molten salt heat storage device, and the preheated softened water is evaporated in multiple stages by high-temperature molten salt, so as to achieve efficient generation of wet saturated steam and improve the thermal energy utilization rate. By setting a control device, the system can monitor the steam injection demand in real time, and dynamically generate a linkage control scheme for the water supply device, the preheating device and the steam generation device, so as to quickly respond to changes in the steam injection demand, avoid energy waste, and improve the flexibility and stability of the system operation. The present invention overcomes the problems of slow startup response and poor linkage in the prior art, and significantly improves the operating efficiency and energy efficiency of the steam generation system.

[0035] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 is a system structure diagram of a steam generation system based on solid thermal storage and molten salt heating provided by an embodiment of the present invention; Figure 2 It is a specific implementation structure diagram of a steam generation system based on solid heat storage and molten salt heating provided by one embodiment of the present invention; Figure 3 It is a flow chart of the steps of a method for controlling a steam generation system based on solid thermal storage and molten salt heating provided by one embodiment of the present invention.

[0037] Description of Reference Numerals 1. Softened water tank; 2. Water supply booster pump; 3. Water supply flow meter; 4. Plunger pump; 5. High-pressure water supply pipeline; 6. Solid heat storage preheater; 7. Direct-flow molten salt heater; 8. Direct-flow molten salt evaporator; 9. Steam pipeline; 10. High-temperature and high-pressure water supply pipeline; 11. Start-up discharge pipeline; 12. Three-way regulating valve; 13. Discharge expansion tank; 14. High-temperature molten salt pump; 15. Control system. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0039] Figure 1 1 is a system structure diagram of a steam generation system based on solid thermal storage and molten salt heating provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a steam generation system based on solid heat storage and molten salt heating, the system comprising: a water supply device for supplying softened water; a preheating device connected to the water supply device for preheating softened water; wherein the preheating device is arranged corresponding to the solid heat storage device, and the preheating device is based on heat exchange with the solid heat storage device to preheat the softened water; a steam generating device connected to the outlet end of the preheating device, for performing multi-stage evaporation on the preheated softened water to obtain wet saturated steam for steam injection; wherein the steam generating device is arranged corresponding to the molten salt heat storage device, and the steam generating device is based on heat exchange with the high-temperature molten salt in the molten salt heat storage device to obtain wet saturated steam for steam injection; a control device for generating a linkage control scheme for the water supply device, the preheating device and the steam generating device based on real-time steam injection demand. In an embodiment of the present invention, the scheme of the present invention combines a solid heat storage device with a preheating device, and uses the stable heat provided by the solid heat storage device to efficiently preheat the softened water, thereby shortening the system startup time and reducing the energy waste during the preheating process. At the same time, the steam generating device is linked with the molten salt heat storage device, and the preheated softened water is evaporated in multiple stages by high-temperature molten salt, so as to achieve efficient generation of wet saturated steam and improve the thermal energy utilization rate. By setting a control device, the system can monitor the steam injection demand in real time, and dynamically generate a linkage control scheme for the water supply device, the preheating device and the steam generating device, so as to quickly respond to changes in the steam injection demand, avoid energy waste, and improve the flexibility and stability of the system operation. The present invention overcomes the problems of slow startup response and poor linkage in the prior art, and significantly improves the operating efficiency and energy efficiency of the steam generating system.

[0040] Preferably, the water supply device includes: a softened water tank for storing softened water; a plunger pump connected to the outlet side of the softened water tank via a pipeline, for pressurizing the softened water when supplying softened water to the preheating device, thereby supplying water in a high-pressure state.

[0041] In the embodiment of the present invention, the softened water tank can adapt to the dynamic water supply demand of the steam injection system through the reserve of softened water, ensuring sufficient supply of softened water in a short time, and the plunger pump provides constant high-pressure softened water input to the preheating device and the steam generating device through the precise pressure regulation function. This design is particularly suitable for the dynamic demand for wet saturated steam in the steam injection system of heavy oil fields.

[0042] In the prior art, due to the dynamic fluctuation of steam injection demand, the shortage of water supply pressure and flow rate will directly affect the efficiency of subsequent preheating and steam generation, especially when the system is started or the load fluctuates, the softened water supply is prone to instability, resulting in reduced efficiency and increased energy consumption of the preheating device. The present invention pressurizes the softened water by a plunger pump and delivers the softened water to the preheating device in a high-pressure state, which not only improves the water supply pressure, but also optimizes the heat exchange efficiency of the preheating device, thereby reducing the energy loss of the system during load adjustment.

[0043] Based on the scheme of the present invention, combined with the design of solid heat storage and molten salt heat storage, the high-pressure water supply method of the water supply device of the present invention significantly improves the unstable water supply problem in the existing system, and provides constant and stable input conditions for the preheating device and the steam generating device. The combined design of the softened water tank and the plunger pump can quickly respond to the water supply parameter adjustment scheme generated by the control device, and still ensure the continuous and stable operation of the water supply system when the dynamic steam injection demand changes. At the same time, through the efficient pressurization of the plunger pump, the softened water can be quickly heated and enter the multi-stage evaporation stage, shortening the startup time of the system and reducing the energy waste of the system during the startup process. In addition, the precise control function of the plunger pump can reduce the operating energy consumption of the water supply device, which is consistent with the goal of improving the overall operating efficiency of the system and optimizing energy consumption proposed in the original document, and provides strong support for energy conservation and emission reduction of the steam injection system.

[0044] Preferably, the solid heat storage device is provided with one or a plurality of solid heat storage devices arranged in stages; a temperature sensor is provided at the outlet end of the preheating device for collecting the real-time temperature of the output softened water; the control module is also used to determine whether the real-time temperature of the output softened water of the preheating device meets the required temperature of the steam generating device.

[0045] Furthermore, the solid heat storage device includes a circulation pipeline; when the real-time temperature of the softened water output by the preheating device does not meet the required temperature of the steam generating device, the softened water output by the preheating device flows back to the inlet of the preheating device based on the circulation pipeline, and secondary preheating is performed until the real-time temperature of the softened water output by the preheating device meets the required temperature of the steam generating device, and the circulation pipeline is closed.

[0046] In an embodiment of the present invention, the solid heat storage device includes one or more solid heat storage devices arranged in a hierarchical manner. Different heat storage devices can provide heat exchange at different temperature levels according to the softened water preheating requirements to achieve efficient heat distribution and utilization. In order to further improve the accuracy of the preheating process, a temperature sensor is provided at the outlet of the preheating device to monitor the output temperature of the softened water in real time. The temperature sensor can feed back the softened water temperature data collected in real time to the control module, and the control module compares the real-time temperature of the softened water output by the preheating device with the target temperature required by the steam generation device to determine whether the temperature requirement for subsequent steam generation is met.

[0047] In actual operation, when the real-time temperature of the softened water output by the preheating device does not reach the required temperature of the steam generating device, the control module can return the softened water at the outlet of the preheating device to the inlet of the preheating device for secondary preheating based on the circulation pipeline designed for the solid heat storage device. This circulation reflux preheating design not only ensures that the softened water temperature reaches the target requirement of the steam generating device, but also avoids the problem of reduced heat exchange efficiency and system performance due to direct entry into the steam generating device due to insufficient temperature. The secondary preheating process continues until the real-time temperature of the softened water reaches the target required temperature, at which time the control module closes the circulation pipeline and resumes the normal water supply process.

[0048] Through the above design, the solid heat storage device can not only provide heat in stages to meet different preheating requirements, but also establish a high-precision softened water temperature regulation mechanism by combining temperature sensors and circulation loops.

[0049] Preferably, the control device is configured to: collect the current storage capacity of the steam injection well, system operating status parameters and historical steam injection data of the steam injection well in real time as prediction basic data; perform steam injection demand prediction at a predetermined time in the future based on the long short-term memory network and the prediction basic data; based on the predicted value of the steam injection demand, respectively determine the operating parameters of the water supply device, the preheating device and the steam generating device; generate a corresponding joint control scheme based on the determined operating parameters of the water supply device, the preheating device and the steam generating device.

[0050] In an embodiment of the present invention, the control device establishes a comprehensive prediction basic data set by real-time collection of the current storage capacity of the steam injection well, system operating status parameters (such as softened water flow, preheating temperature, steam output pressure, etc.) and historical steam injection data. Based on time series prediction algorithms such as long short-term memory networks (LSTM), the control device can capture the time series characteristics in historical data and accurately predict the steam injection demand at a predetermined time in the future. The use of the LSTM model enables the system to handle complex changes in steam injection demand trends, which is particularly suitable for nonlinear and variable conditions in the process of steam injection in oil fields.

[0051] After obtaining the predicted value of steam injection demand, the control device further dynamically determines the operating parameters of the water supply device, preheating device and steam generation device based on the predicted results. For example, the key operating parameters such as the target softened water supply, the heat output of the preheating device and the molten salt circulation flow of the steam generation device are determined by the predicted value of steam injection demand, ensuring that the various modules of the system can achieve efficient collaborative work while meeting the steam injection demand. Finally, the control device generates a linkage control scheme based on the calculated operating parameters to achieve full-process linkage control of the water supply device, preheating device and steam generation device, and quickly respond to dynamically changing steam injection demands.

[0052] Specifically, the rule for performing the steam injection demand forecast at a predetermined time in the future based on the long short-term memory network and the forecast basic data is:

[0053] in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The method further comprises: determining the steam injection demand at a predetermined future time and the storage capacity of the current steam injection well based on the steam injection demand at the predetermined future time.

[0054] In an embodiment of the present invention, the present invention realizes the prediction of steam injection demand at a predetermined time in the future by combining a long short-term memory network (LSTM) with prediction basic data. The prediction basic data includes historical steam injection data, the current operating status of the steam injection well, and related external parameters, such as steam injection pressure, temperature, steam flow, etc. The historical steam injection data records the changing trend of steam injection demand at different times. By modeling and analyzing these data through a long short-term memory network, the time series characteristics and potential nonlinear relationships of steam injection demand can be effectively captured. Compared with traditional linear prediction models, LSTM can memorize data features with a longer time span, and is more sensitive to short-term changes, thereby improving the accuracy of prediction.

[0055] On this basis, the system analyzes the storage capacity of the steam injection well (such as the maximum acceptable steam volume and the current storage status), and further combines the real-time demand change rate to correct the steam injection demand at the scheduled time in the future. This process can dynamically adjust the prediction results to make them closer to the actual working conditions. For example, when the current storage capacity of the steam injection well is low, the system can appropriately lower the predicted value of future steam injection demand to avoid waste of resources caused by excessive steam generation; when the storage capacity is sufficient, the steam injection plan can be maintained with high efficiency.

[0056] Based on the scheme of the present invention, by introducing a long short-term memory network, it is possible to capture both the long-term trend and short-term variation of historical steam injection data, thereby improving the accuracy of future steam injection demand forecasts. By correcting the forecast results in combination with the storage capacity of the steam injection well and the real-time operating conditions, it is possible to dynamically respond to changes in actual demand and avoid the deviations caused by traditional static forecasting methods. By optimizing the match between the forecast results and the current operating status, the system can effectively avoid excess or insufficient steam caused by forecast deviations. High-precision steam injection demand forecasts provide a reliable basis for the linkage control of subsequent water supply devices, preheating devices, and steam generation devices, thereby improving the operating efficiency of the overall system.

[0057] Furthermore, the operating parameters of the water supply device are determined by the following rules: based on the steam injection demand at a predetermined time in the future and the operating efficiency of the current system, the target water supply volume that meets the corresponding steam injection demand is determined, and the determination rule is:

[0058] in, Target water supply; The operating efficiency of the current system; based on the determined target water supply and the time interval between the future scheduled time and the current time, the minimum operating power of the water supply device is determined as the operating parameter of the water supply device.

[0059] In an embodiment of the present invention, the operating parameter determination rule of the water supply device is intended to meet the demand for dynamic adjustment of the steam injection system according to the steam injection demand value at the future scheduled time and the operating efficiency of the current system. Specifically, the determination of the target water supply needs to comprehensively consider the future steam injection demand and the actual operating efficiency of the current system, and the water supply device operating parameters are coordinated with the overall system goals by converting the steam injection demand into the water supply demand. The future steam injection demand is obtained through real-time data acquisition and prediction algorithms, and combined with the key parameter of the current system operating efficiency, it is used to adjust the target water supply to ensure that the output flow of the water supply device meets the needs of the preheating and steam generation devices. After the target water supply is determined, the minimum operating power of the water supply device needs to be further calculated based on the current operating capacity of the water supply device and the time interval between the future scheduled time and the current time. This power parameter not only ensures the timeliness and stability of water supply, but also minimizes the energy consumption of the water supply device, thereby achieving the dual goals of efficiency and energy saving. The operating parameters of the water supply device, including flow and power, are dynamically adjusted and are consistent with the preheating device and the steam generation device under the coordinated control of the control device.

[0060] Furthermore, the operation parameters of the preheating device are determined by the following rules: based on the saturated temperature of the steam required for the steam injection demand at a predetermined time in the future and the heat exchange efficiency of the steam generating device, the target water supply temperature is determined; based on the target water supply temperature and the current water supply temperature, the target preheating heat is determined, and the determination rule is:

[0061] in, Preheat the heat for the target; Target water supply; is the specific heat capacity of softened water; and are the target temperature and the current water supply temperature respectively; based on the determined target preheating heat and the time interval between the future scheduled moment and the current moment, the minimum operating power of the preheating device is determined as the operating parameter of the preheating device.

[0062] In an embodiment of the present invention, the operation parameter determination rule of the preheating device is aimed at meeting the steam injection demand at a predetermined time in the future. In combination with the saturation temperature required for steam generation and the heat exchange efficiency of the steam generating device, the target temperature of the water supply is first determined. The determination of the target temperature is centered on meeting the needs of the steam generating device, ensuring that the softened water entering the steam generating device has a higher starting temperature, thereby reducing the energy consumption during the evaporation process. The calculation of the target preheating heat is based on the difference between the target water supply temperature and the current water supply temperature. At the same time, combined with the water supply flow rate and the specific heat capacity of softened water, it can accurately describe the amount of heat that the preheating device needs to provide. By calculating the target preheating heat, the preheating device can dynamically determine the required minimum operating power according to the time interval between the future predetermined time and the current time, thereby serving as the operating parameter input of the preheating device. This calculation rule can not only meet the strict requirements of the temperature of the dynamic steam injection demand change, but also avoid unnecessary energy waste through the accurate calculation of the minimum power, thereby optimizing the energy efficiency of the system.

[0063] Furthermore, the operating parameters of the steam generating device are determined by the following rules: based on the steam injection demand at a predetermined time in the future and the steam vaporization latent heat of the steam generating device, the target steam generation heat is determined, and the determination rule is:

[0064] in, Generate heat for target steam; is the latent heat of steam vaporization of the steam generating device; determines the molten salt circulation flow rate based on the target steam generation heat; determines the minimum operating power of the steam generating device based on the target steam generation heat and the molten salt circulation flow rate, and the time interval between the future scheduled moment and the current moment, as the operating parameter of the preheating device.

[0065] In the embodiment of the present invention, the operating parameter determination rule of the steam generating device is centered on the steam injection demand at a predetermined time in the future. In combination with the operating characteristics of the steam generating device and the latent heat of vaporization of the steam, the target steam generation heat is first calculated. The target steam generation heat is a key parameter to meet the future steam injection demand and directly affects the operating power of the steam generating device. By converting the future steam injection demand into the heat required for steam generation, the total energy that the steam generating device needs to transfer to the water supply is clarified to ensure that the steam injection demand is met.

[0066] Based on the target steam generation heat, the molten salt circulation flow rate is further calculated. As the main heat source of the steam generating device, the circulation flow rate of the molten salt determines the heat exchange efficiency and heat supply capacity of the steam generating device. According to the target steam generation heat, the specific heat capacity of the molten salt and the temperature difference between the inlet and outlet of the molten salt, the required circulation flow rate of the molten salt can be accurately determined to ensure efficient heat exchange while avoiding energy waste caused by excessive circulation. In addition, based on the time interval between the future scheduled moment and the current moment, the minimum operating power of the steam generating device is calculated as the input condition of the operating parameters. The calculation of the minimum operating power can ensure that the steam generating device minimizes the operating energy consumption while meeting the steam injection demand, thereby optimizing the overall energy utilization efficiency of the system.

[0067] Furthermore, the rule for determining the molten salt circulation flow rate based on the target steam generation heat is:

[0068] in, is the molten salt circulation flow rate; is the specific heat capacity of the molten salt; and are the temperatures of hot and cold salt, respectively.

[0069] In an embodiment of the present invention, the determination rule of the molten salt circulation flow rate is based on the target steam generation heat. By analyzing the specific heat capacity, inlet temperature and outlet temperature of the molten salt, the molten salt circulation flow rate is accurately calculated to ensure that the heat demand of the steam generation device is met. As an efficient heat storage medium, the heat transfer capacity of molten salt is closely related to the circulation flow rate and temperature difference. By reasonably controlling the molten salt circulation flow rate, not only can the required heat be stably delivered to the steam generation device, but also insufficient heat transfer due to insufficient molten salt circulation or energy waste caused by excessive circulation can be avoided.

[0070] In this rule, the specific heat capacity of molten salt is a key parameter, which reflects the amount of heat that can be transferred per unit mass of molten salt when the temperature changes; the inlet and outlet temperatures determine the effective temperature difference that the molten salt can actually provide during the circulation process. According to the target steam generation heat, combined with the heat transfer characteristics of the molten salt, the required flow rate of the molten salt can be accurately determined to ensure that the heat supply of the steam generation device always meets the steam injection demand. Through this rule, not only can the dynamic adjustment of the molten salt circulation flow rate be achieved, but also the energy efficiency ratio of the molten salt circulation can be flexibly optimized according to different steam injection requirements and changes in steam generation heat, thereby improving the overall operating efficiency of the system.

[0071] Furthermore, a corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device, including: executing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device and the minimum operating power of the steam generating device; randomly adjusting the operating power of an operating device, and updating the operating powers of the other two operating devices based on the adjusted operating power, and calculating the function value of the pre-constructed objective function after the adjustment; updating the operating power of each operating device based on the function value until the function value of the objective function meets the iteration termination condition or reaches the preset number of iterations, and outputting the operating power of each operating device under the optimal state; generating a corresponding joint control scheme based on the operating power of each operating device under the optimal state, and the current operating power of each operating device.

[0072] Specifically, the pre-built objective function is:

[0073] in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

[0074] In an embodiment of the present invention, in order to achieve efficient coordinated operation of the water supply device, the preheating device and the steam generating device, the present invention designs a joint control optimization scheme based on the minimum operating power. Specifically, the joint control scheme initializes the entire system based on the minimum operating power of the water supply device, the preheating device and the steam generating device. By initializing the operating power, the initial operating state of each device is determined, and the operating power of one of the devices is gradually adjusted in subsequent steps. The objective function value is dynamically calculated based on the adjusted operating power, and the operating powers of the other two devices are updated accordingly to optimize the overall energy consumption of the system.

[0075] After each adjustment, the objective function value of the current system is calculated to evaluate whether the current operating state meets the optimization conditions. If the objective function value does not reach the set optimization termination condition, the system will continue to iteratively adjust the operating power of each device until the numerical value of the objective function converges or reaches the preset optimization accuracy. Finally, the system outputs the operating power of each device in the optimal state under the current conditions, and generates the corresponding joint control scheme based on the optimal state. The joint control scheme contains the real-time operating power of each device and the detailed logic of how they work together during the steam injection process.

[0076] The core goal of this optimization scheme is to minimize the total energy consumption of the system by dynamically adjusting the operating power of the water supply device, preheating device and steam generation device. The total energy consumption of the system depends not only on the power of a single device, but also on the degree of operational coordination between the devices. Therefore, this scheme significantly improves the energy efficiency of the system while ensuring the overall operational stability of the system.

[0077] Furthermore, the corresponding joint control scheme is generated based on the operating power of each operating device in the optimal state and the current operating power of each operating device, including: determining the power to be adjusted based on the operating power of each operating device in the optimal state and the current operating power of each operating device; decoupling the power to be adjusted to obtain the amount to be adjusted of each executing component to determine the adjustment scheme of each component; and combining the adjustment schemes of all components to obtain the joint control scheme.

[0078] In an embodiment of the present invention, the present invention generates a corresponding joint control scheme based on the optimal operating power of each operating device to achieve the coordinated optimization operation of the water supply device, the preheating device and the steam generation device. Specifically, the scheme first determines the optimal operating power of each operating device under the current working conditions. These optimal operating powers are obtained through optimization calculations and can meet the steam injection requirements of the system while minimizing the total energy consumption of the system. On this basis, the power difference that needs to be adjusted is further calculated in combination with the current actual operating power of each operating device, and this is used as the power input to be adjusted for each device.

[0079] Subsequently, the power to be adjusted of each operating device is decomposed and analyzed to obtain the amount to be adjusted of each actuator (such as a plunger pump or centrifugal pump, flow control valve, pressure sensor, solid heat accumulator, heating tube or electric heater, return pipe valve, molten salt circulation pump, etc.). By accurately calculating the specific adjustment parameters of each device, an independent control scheme for each device is generated, and all control schemes are integrated to eventually form a joint control scheme covering the three links of water supply, preheating and steam generation. The joint control scheme can not only clarify the specific adjustment actions of each device under the current working conditions, but also ensure that the operating power adjustment of each device works together within the overall system framework to avoid the adverse effects of the adjustment of a single device on other links.

[0080] Preferably, the system also includes: a pressure relief device, used to release the air pressure in the outlet side pipeline of the preheating device when the steam supply is stopped; the pressure relief device is connected to the water supply pipeline between the preheating device and the steam generating device through a three-way valve; the pressure relief device includes a discharge expansion tank, which is used to store the high-pressure softened water introduced during the pressure relief process.

[0081] Furthermore, the control device is also used to control the valve on the discharge expansion tank side of the three-way valve to open in response to a pressure relief request instruction.

[0082] In an embodiment of the present invention, Example: like Figure 2 , provides a steam generation system based on solid thermal storage and molten salt heating, the specific execution process of which is as follows: The device mainly includes a softened water tank 1; a water pressure pump 2; a water flow meter 3; a plunger pump 4; a high-pressure water supply pipeline 5; a solid heat storage preheater 6; a direct-flow molten salt heater 7; a direct-flow molten salt evaporator 8; a steam pipeline 9; a high-temperature and high-pressure water supply pipeline 10; a start-up discharge pipeline 11; a three-way regulating valve 12; a discharge expansion tank 13; a high-temperature molten salt pump 14; and a control device 15. Among them, the softened water tank 1; the water pressure pump 2; the water flow meter 3; the plunger pump 4; and the high-pressure water supply pipeline 5 together constitute a water supply device. The direct-flow molten salt heater 7; the direct-flow molten salt evaporator 8; the steam pipeline 9; the high-temperature and high-pressure water supply pipeline 10; and the start-up discharge pipeline 11 together constitute a preheating device.

[0083] Combined with the examples, the working principles and processes of each part of the system are as follows.

[0084] 1) Softened water for oilfield steam injection is connected to softened water tank 1; average flow rate is 18t / h, water temperature is 40-90℃.

[0085] 2) The softened water in the softened water tank 1 is pressurized by the water supply pressure pump 2 and then metered 3. Then, it is pressurized by the plunger pump 4 and sent to the solid heat storage preheater 6 to be preheated to a temperature above the freezing point of the molten salt. The pressure of the pressurized softened water is 18 MPa and the flow rate is 18 t / h.

[0086] 3) The solid heat storage preheater 6 uses green electricity or valley electricity for heating. Multiple units can be connected in series or in parallel according to the scale and can be started in real time to absorb abandoned electricity and regulate the power grid.

[0087] 4) The softened water temperature at the outlet of solid heat storage preheater 6 is interlocked with the preheater fan inverter, and the softened water temperature at the outlet of solid heat storage preheater 6 is automatically controlled at the set value by controlling the air volume; the set value of the softened water temperature at the outlet of solid heat storage preheater 6 is 250℃.

[0088] 5) Before the softened water temperature at the outlet of the solid heat storage preheater 6 reaches the set value, the softened water flows through the start-up discharge pipe 18 to the discharge expansion tank 19.

[0089] 6) After the softened water temperature at the outlet of the solid heat storage preheater 6 reaches the set value, the softened water goes to the direct-flow molten salt heater 7 and the direct-flow molten salt evaporator 8.

[0090] 7) The softened water preheated to a certain temperature is transported to the direct-flow molten salt heater 7 and the direct-flow molten salt evaporator 8 for heat exchange with the high-temperature molten salt. The direct-flow molten salt heater 7 and the direct-flow molten salt evaporator 8 are direct-flow immersion heat exchange structures, and the coils are serpentine coils, with wet saturated steam in the coils and molten salt in the shell. After the softened water exchanges heat with the high-temperature molten salt, wet saturated steam with a certain dryness that meets the steam injection requirements is generated and connected to the steam injection well for steam injection; wet saturated steam parameters: 14.1MPa, dryness 80%.

[0091] 8) The three-way regulating valve 12 on the solid heat storage preheater outlet start-up discharge pipe 11 is interlocked with the stop signal of the plunger pump 4. When the plunger pump 4 stops, the interlock opens the three-way regulating valve 12 at the solid heat storage preheater outlet, and the high-pressure softened water in the system is transported to the discharge expansion tank 13 through the solid heat storage preheater outlet bypass pipe 11, thereby realizing system pressure relief.

[0092] Figure 3 1 is a flow chart of a method for controlling a steam generation system based on solid thermal storage and molten salt heating provided by an embodiment of the present invention. Figure 3 As shown, an embodiment of the present invention provides a method for controlling a steam generation system based on solid thermal storage and molten salt heating, the method comprising: Step S10: collecting the current storage capacity of the steam injection well, system operation status parameters and historical steam injection data of the steam injection well in real time as prediction basic data.

[0093] Step S20: Execute the steam injection demand prediction at a predetermined time in the future based on the long short-term memory network and the prediction basic data.

[0094] Step S30: Based on the predicted value of the steam injection demand, the operating parameters of the water supply device, the preheating device and the steam generation device are determined respectively.

[0095] Step S40: Generate a corresponding joint control scheme based on the determined operating parameters of the water supply device, the preheating device and the steam generating device.

[0096] Preferably, the rule for performing the prediction of the steam injection demand at a predetermined time in the future based on the long short-term memory network and the prediction basic data is:

[0097] in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The method further comprises: determining the steam injection demand at a predetermined future time and the storage capacity of the current steam injection well based on the steam injection demand at the predetermined future time.

[0098] Preferably, a corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device, including: executing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device and the minimum operating power of the steam generating device; randomly adjusting the operating power of an operating device, and updating the operating powers of the other two operating devices based on the adjusted operating power, and calculating the function value of the pre-constructed objective function after the adjustment; updating the operating power of each operating device based on the function value until the function value of the objective function meets the iteration termination condition or reaches a preset number of iterations, and outputting the operating power of each operating device in the optimal state; generating a corresponding joint control scheme based on the operating power of each operating device in the optimal state, and the current operating power of each operating device.

[0099] Preferably, the pre-constructed objective function is:

[0100] in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

[0101] An embodiment of the present invention further provides a computer-readable storage medium having instructions stored thereon, which, when executed on a computer, enables the computer to execute the above-mentioned steam generation system control method based on solid thermal storage and molten salt heating.

[0102] Those skilled in the art will understand that all or part of the steps in the method for implementing the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0103] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0104] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A steam generation system based on solid thermal storage and molten salt heating, characterized in that: The system comprises: A water supply device, used for supplying softened water; A preheating device connected to the water supply device is used to preheat softened water; wherein, The preheating device is arranged corresponding to the solid heat storage device, and the preheating device performs heat exchange with the solid heat storage device to preheat the softened water; The steam generating device connected to the outlet of the preheating device is used to perform multi-stage evaporation on the preheated softened water to obtain wet saturated steam for steam injection; wherein, The steam generating device is arranged corresponding to the molten salt heat storage device, and the steam generating device performs heat exchange with the high-temperature molten salt in the molten salt heat storage device to obtain wet saturated steam for steam injection; The control device is used to generate a linkage control scheme for the water supply device, the preheating device and the steam generation device based on the real-time steam injection demand.

2. The system according to claim 1, characterized in that The water supply device comprises: Softened water tank, used to store softened water; A plunger pump connected to the outlet side of the softened water tank based on a pipeline is used to pressurize the softened water when supplying softened water to the preheating device, thereby supplying water in a high-pressure state.

3. The system according to claim 1, characterized in that The solid heat storage device is provided with one or a plurality of solid heat storage tanks arranged in stages; The outlet of the preheating device is provided with a temperature sensor for collecting the real-time temperature of the output softened water; The control module is also used to determine whether the real-time temperature of the softened water output by the preheating device meets the required temperature of the steam generating device.

4. The system according to claim 3, characterized in that The solid heat storage device comprises a circulation pipeline; When the real-time temperature of the softened water output by the preheating device does not meet the required temperature of the steam generating device, the softened water output by the preheating device flows back to the inlet of the preheating device based on the circulation pipeline, and secondary preheating is performed until the real-time temperature of the softened water output by the preheating device meets the required temperature of the steam generating device, and the circulation pipeline is closed.

5. The system according to claim 1, characterized in that The control device is configured to: Real-time collection of the current storage capacity of the steam injection well, system operating status parameters and historical steam injection data as the basic data for prediction; Execute steam injection demand forecasting at a predetermined time in the future based on the long short-term memory network and the forecast basic data; Based on the predicted value of steam injection demand, respectively determine the operating parameters of the water supply device, the preheating device and the steam generation device; A corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device.

6. The system according to claim 5, characterized in that The rule for performing steam injection demand forecasting at a future scheduled time based on the long short-term memory network and the forecast basic data is: in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The steam injection demand at a predetermined time in the future; The method further comprises: The demand change rate is determined based on the steam injection demand at a predetermined future time and the current storage capacity of the steam injection well.

7. The system according to claim 6, characterized in that The rules for determining the operating parameters of the water supply device are: Based on the steam injection demand at the scheduled time in the future and the operating efficiency of the current system, the target water supply volume that meets the corresponding steam injection demand is determined. The determination rule is: in, Target water supply; The operating efficiency of the current system; Based on the determined target water supply volume and the time interval between the future scheduled moment and the current moment, the minimum operating power of the water supply device is determined as an operating parameter of the water supply device.

8. The system according to claim 6, characterized in that The rules for determining the operating parameters of the preheating device are: Determine the target water supply temperature based on the saturated temperature of steam required for steam injection at a predetermined time in the future and the heat exchange efficiency of the steam generating device; The target preheating heat is determined based on the target water supply temperature and the current water supply temperature. The determination rule is: in, Preheat the heat for the target; Target water supply; is the specific heat capacity of softened water; and are the target temperature and the current water supply temperature respectively; Based on the determined target preheating heat and the time interval between the future scheduled moment and the current moment, the minimum operating power of the preheating device is determined as the operating parameter of the preheating device.

9. The system according to claim 6, characterized in that The rules for determining the operating parameters of the steam generating device are: Based on the steam injection demand at a predetermined time in the future and the steam vaporization latent heat of the steam generating device, the target steam generation heat is determined, and the determination rule is: in, Generate heat for target steam; is the latent heat of vaporization of steam in the steam generating device; determining the molten salt circulation flow rate based on target steam generation heat; Based on the target steam generation heat and molten salt circulation flow rate, and the time interval between the future scheduled moment and the current moment, the minimum operating power of the steam generating device is determined as the operating parameter of the steam generating device.

10. The system according to claim 9, characterized in that The rule for determining the molten salt circulation flow rate based on the target steam generation heat is: in, is the molten salt circulation flow rate; is the specific heat capacity of the molten salt; and are the temperatures of hot and cold salt, respectively.

11. The system according to claim 5, characterized in that Based on the determined operating parameters of the water supply device, the preheating device and the steam generation device, a corresponding joint control scheme is generated, including: performing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device, and the minimum operating power of the steam generation device; Randomly adjust the operating power of one operating device, and update the operating powers of the other two operating devices based on the adjusted operating power, and calculate the function value of the pre-constructed objective function after the adjustment; Based on the function value, the operating power of each operating device is updated until the function value of the objective function satisfies the iteration termination condition or reaches a preset number of iterations, and the operating power of each operating device in the optimal state is output; A corresponding joint control scheme is generated based on the operating power of each operating device under the optimal state and the current operating power of each operating device.

12. The system according to claim 11, characterized in that The pre-built objective function is: in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

13. The system according to claim 11, characterized in that The generating of a corresponding joint control scheme based on the operating power of each operating device in the optimal state and the current operating power of each operating device includes: Determine the power to be adjusted based on the operating power of each operating device in the optimal state and the current operating power of each operating device; Decouple the power to be adjusted, obtain the amount to be adjusted of each execution component, and determine the adjustment plan for each component; Combine the adjustment plans of all components to obtain a joint control plan.

14. The system according to claim 1, characterized in that The system further comprises: The pressure relief device is used to release the air pressure in the outlet pipe of the preheating device when the steam supply is stopped; The pressure relief device is connected to the water supply pipeline between the preheating device and the steam generating device through a three-way valve; The pressure relief device comprises a discharge expansion tank for storing high-pressure softened water introduced during the pressure relief process.

15. The system according to claim 14, wherein the control device is further configured to control the valve on the discharge expansion tank side of the three-way valve to open in response to a pressure relief request instruction.

16. A method for controlling a steam generation system based on solid thermal storage and molten salt heating, characterized in that: The method is applied to the steam generation system based on solid thermal storage and molten salt heating according to any one of claims 1 to 15, and the method comprises: Real-time collection of the current storage capacity of the steam injection well, system operating status parameters and historical steam injection data as the basic data for prediction; Execute steam injection demand forecasting at a predetermined time in the future based on the long short-term memory network and the forecast basic data; Based on the predicted value of steam injection demand, respectively determine the operating parameters of the water supply device, the preheating device and the steam generation device; A corresponding joint control scheme is generated based on the determined operating parameters of the water supply device, the preheating device and the steam generating device.

17. The method according to claim 16, characterized in that The rule for performing steam injection demand forecasting at a future scheduled time based on the long short-term memory network and the forecast basic data is: in, It is a long short-term memory network prediction model; It is the historical steam injection data; The time span of historical steam injection data; The steam injection demand at a predetermined time in the future; The method further comprises: The demand change rate is determined based on the steam injection demand at a predetermined future time and the current storage capacity of the steam injection well.

18. The method according to claim 16, characterized in that Based on the determined operating parameters of the water supply device, the preheating device and the steam generation device, a corresponding joint control scheme is generated, including: performing state initialization based on the minimum operating power of the water supply device, the minimum operating power of the preheating device, and the minimum operating power of the steam generation device; Randomly adjust the operating power of one operating device, and update the operating powers of the other two operating devices based on the adjusted operating power, and calculate the function value of the pre-constructed objective function after the adjustment; Based on the function value, the operating power of each operating device is updated until the function value of the objective function satisfies the iteration termination condition or reaches a preset number of iterations, and the operating power of each operating device in the optimal state is output; A corresponding joint control scheme is generated based on the operating power of each operating device under the optimal state and the current operating power of each operating device.

19. The method according to claim 18, characterized in that The pre-built objective function is: in, is the total power; The time interval between the future scheduled time and the current time; , and They are respectively the operating powers of the water supply device, preheating device and steam generation device after this round of iteration.

20. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the steam generation system control method based on solid thermal storage and molten salt heating as described in any one of claims 1 to 15.

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