Furnace control method, apparatus, device and storage medium for delayed coking

Abstract

The application discloses a heating furnace control method, device, equipment and storage medium for delayed coking, and the method comprises the following steps: generating a three-dimensional thermodynamic model of the heating furnace and performing gridding according to heating furnace modeling; obtaining simulation results of the three-dimensional thermodynamic model according to preset input parameters; judging whether the outlet cross-section position of the heating furnace includes a grid exceeding a preset target temperature range, if yes, updating the heat source power and returning to the simulation result calculation step; if no and the current judgment is the first judgment, updating the feeding rate and returning to the simulation result calculation step; if no and the current judgment is not the first judgment, going to the next step; judging whether the heating furnace includes a grid exceeding the preset upper limit of free state coke content, if yes, updating the heat source power and the feeding rate and returning to the simulation result calculation step; if no, generating a control instruction according to the current heat source power and the feeding rate. The application can fully exert the production efficiency of the heating furnace.

Description

Technical Field

[0001] This invention relates to the field of chemical processes, and in particular to a method, apparatus, equipment, and storage medium for controlling a heating furnace used in delayed coking. Background Technology

[0002] Atmospheric and vacuum residue is the heaviest fraction in crude oil processing. However, due to the high wax content and low asphaltene content of crude oil in my country, atmospheric and vacuum residue constitutes a relatively large proportion of the petroleum fraction composition. Delayed coking, with its relatively simple process and good economics, has become an important technological means for the lightening of atmospheric and vacuum residue in China.

[0003] Delayed coking is a type of pyrolysis process, mainly consisting of two core pieces of equipment: a heating furnace and a coking tower. The heating furnace is primarily responsible for rapidly heating the raw materials. Once the raw materials reach the reaction temperature (usually around 500 degrees Celsius) but have not yet coked, they are quickly introduced into the coking tower. The pyrolysis and condensation reactions of the raw materials are delayed until they occur within the coking tower, producing coke and light oil products.

[0004] The inventors discovered through research that the existing control methods for heating furnaces have at least the following drawbacks:

[0005] It is impossible to fully utilize the production efficiency of the heating furnace while ensuring that premature coking is avoided inside the furnace.

[0006] The information disclosed in the background section is intended only to enhance the understanding of the overall background of the present invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to ensure that premature coking in the heating furnace is avoided while maximizing the production efficiency of the heating furnace.

[0008] This invention provides a method for controlling a heating furnace for delayed coking, comprising the following steps:

[0009] S11. Based on the furnace modeling, generate a three-dimensional thermodynamic model of the furnace and mesh the three-dimensional thermodynamic model;

[0010] S12. Determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil;

[0011] S13. Using a preset time step as the calculation period, calculate the simulation results of the three-dimensional thermodynamic model based on the input parameters; the simulation results include the predicted temperature distribution inside the furnace after one time step.

[0012] S14. Determine whether the outlet section of the heating furnace includes a grid that exceeds the preset target temperature range based on the predicted temperature value. If yes, update the heat source power of the heating furnace by adjusting the heat source power according to the first preset rule and return to step S13. If no, and this is the first determination, update the feed rate by adjusting the feed rate according to the first preset upward adjustment ratio and return to step S13. If no, and this is not the first determination, proceed to step S15.

[0013] S15. Based on the predicted temperature value, determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke. If yes, update the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule and return to step S13. If no, generate the heat source power control command and feed rate control command for the heating furnace based on the current heat source power and feed rate.

[0014] Preferably, in this embodiment of the invention, it further includes:

[0015] S16. If, at the current feed rate, after a preset number of iterations, the outlet section of the heating furnace still includes grids exceeding the preset target temperature range, or the heating furnace still includes grids exceeding the preset upper limit of free coke content, the feed rate is reduced to the value before the last update.

[0016] In another aspect of the invention, a heating furnace control device for delayed coking is also provided, comprising:

[0017] The model building unit is used to generate a three-dimensional thermodynamic model of the heating furnace based on the modeling of the heating furnace and to mesh the three-dimensional thermodynamic model;

[0018] The parameter determination unit is used to determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue.

[0019] The simulation result calculation unit calculates the simulation results of the three-dimensional thermodynamic model based on the input parameters, with a preset time step as the calculation period; the simulation results include the predicted temperature distribution in the heating furnace after one time step.

[0020] The first judgment unit is used to determine whether the outlet section position of the heating furnace includes a grid that exceeds the preset target temperature range based on the temperature prediction value. If yes, the heat source power of the heating furnace is adjusted according to the first preset rule to update the heat source power and the result is returned to the simulation calculation unit. If no, and this is the first judgment, the feed rate is adjusted according to the first preset increase ratio to update the feed rate and the result is returned to the simulation calculation unit. If no, and this is not the first judgment, the process is transferred to the second judgment unit.

[0021] The second judgment unit is used to determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke based on the temperature prediction value. If yes, the heat source power and feed rate are updated by increasing the heat source power and feed rate according to the second preset rule and the result is returned to the simulation calculation unit. If no, the heat source power control command and feed rate control command of the heating furnace are generated based on the current heat source power and feed rate.

[0022] Preferably, in this invention, it further includes:

[0023] The rollback unit is used to adjust the feed rate back to the value before the last update when, after a preset number of iterations at the current feed rate, the outlet section of the heating furnace includes grids that exceed the preset target temperature range, or the heating furnace still includes grids that exceed the preset upper limit of free coke content.

[0024] In another aspect of the invention, a heating furnace control device for delayed coking is also provided, comprising:

[0025] Memory, used to store computer programs;

[0026] A processor is configured to invoke and execute the computer program to implement the various steps of the heating furnace control method for delayed coking as described in any of the preceding claims.

[0027] In another aspect of the present invention, a storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the various steps of the heating furnace control method for delayed coking as described in any of the preceding claims.

[0028] The heating furnace control device for delayed coking includes a computer program stored on a medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the methods described in the above aspects and achieve the same technical effects.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] This invention generates a corresponding three-dimensional thermodynamic model based on the modeling of the heating furnace. Using this model, the predicted temperature distribution within the furnace after a given time step can be calculated. This allows for the prediction and determination of whether the temperature at the furnace outlet section exceeds the limit in the next long time step, enabling adjustments to the heat source power and feed rate. The three-dimensional thermodynamic model is then used again to calculate and predict whether the temperature at the furnace outlet section exceeds the limit in the next long time step until the temperature at the outlet section is within a reasonable range. This provides an accurate basis for the rational control of heat source power and feed rate in the next long time step.

[0031] This invention, through working condition prediction, can adjust the heat source power and feed rate in advance according to different working conditions, and determine the maximum feed rate under temperature control that avoids premature coking. Therefore, it can fully utilize the production efficiency of the heating furnace while ensuring that premature coking does not occur in the heating furnace.

[0032] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other objects, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart of the heating furnace control method for delayed coking described in this invention;

[0035] Figure 2 This is a schematic diagram of the structure of the heating furnace control device for delayed coking described in this invention;

[0036] Figure 3 This is a schematic diagram of the structure of the heating furnace control equipment for delayed coking described in this invention. Detailed Implementation

[0037] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0038] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0039] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0040] Example 1

[0041] To ensure the furnace's production efficiency is maximized while preventing premature coking within the furnace, refer to... Figure 1 This invention provides a method for controlling a heating furnace for delayed coking, comprising the following steps:

[0042] S11. Based on the furnace modeling, generate a three-dimensional thermodynamic model of the furnace and mesh the three-dimensional thermodynamic model;

[0043] This invention utilizes three-dimensional thermodynamic simulation technology to simulate temperature and coking distribution data within a heating furnace.

[0044] In practical applications, based on the furnace modeling, a three-dimensional thermodynamic model of the furnace is generated and then meshed. Specifically, this can be done in the following ways:

[0045] Let the inner diameter of the heating furnace be R. h The pipe length is H h The meshed 3D thermodynamic model has β meshes and is stored in a set Data_β, where the temperature of the j-th mesh belonging to set Data_β is T. j The free coke content is Char j ;

[0046] In practical applications, the mesh of the three-dimensional thermodynamic model in the embodiments of the present invention can be one or more of tetrahedral mesh, hexahedral mesh, pyramidal mesh, wedge mesh and polyhedral mesh; its calibration method can be one or more of general physics, fluid dynamics, plasma and semiconductor.

[0047] It should be noted that, in this embodiment of the invention, the heating furnace is connected in series before multiple parallel coking towers. The slag-reducing raw material continuously enters the furnace from the inlet and is heated to a specified temperature. Then, according to the state of the coking tower and in conjunction with the control of the feed valve, after exiting from the outlet of the heating furnace, the slag-reducing raw material that has been heated but not yet coked is introduced into the coking tower in the state of raw coke for delayed coking.

[0048] S12. Determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil;

[0049] Before simulating the temperature distribution inside the heating furnace, various input parameters need to be generated for the three-dimensional thermodynamic model, which may include the heat source power of the heating furnace, as well as the physical properties and feed rate of the vacuum residue.

[0050] In the embodiments of the present invention, any of the existing heating methods can be used for heating, such as electric heating, fuel gas radiation heating, microwave heating, plasma heating, laser heating, electron beam heating or one or more of these.

[0051] It should be noted that the heat source power of the heating furnace in this embodiment of the invention refers to the thermal power required for the heating furnace to directly or indirectly heat the slag-reducing raw materials. For example, when electric heating is used to heat the slag-reducing raw materials in the furnace, the heat source power of the heating furnace refers to the electrical power required to raise the slag-reducing raw materials to a specified temperature; as another example, when fuel gas radiant heating is used, it refers to the amount of thermal radiation required to raise the slag-reducing raw materials to a specified temperature, and the heat source power in this case refers to the amount of fuel gas intake. In this embodiment of the invention, fuel gas radiant heating is preferred.

[0052] S13. Using a preset time step as the calculation period, calculate the simulation results of the three-dimensional thermodynamic model based on the input parameters; the simulation results include the predicted temperature distribution inside the furnace after one time step.

[0053] In this embodiment of the invention, the simulation results of the three-dimensional thermodynamic model obtained by calculating based on the input parameters are periodic, that is, the calculation in one calculation cycle is completed after each time step (each calculation cycle refers to generating one heat source power control command and feed rate control command for the heating furnace); in practical applications, the value of the time step can be determined according to the actual computing power of the computer and the experience of those skilled in the art, and no specific limitation is made here.

[0054] In this embodiment of the invention, the purpose of calculating the simulation results of the three-dimensional thermodynamic model based on the input parameters is to obtain the predicted temperature value inside the heating furnace at the next time step at the current time step, that is, to make a prediction of the predicted temperature value inside the heating furnace.

[0055] S14. Based on the predicted temperature value, determine whether the outlet section of the heating furnace includes a grid that exceeds the preset target temperature range. If yes, adjust the heat source power of the heating furnace according to the first preset rule to update the heat source power and return to step S13. If no, and this is the first determination, adjust the feed rate according to the first preset upward adjustment ratio to update the feed rate and return to step S13. If no, and this is not the first determination, proceed to step S15.

[0056] In this embodiment of the invention, if the heating method of the heating furnace is microwave heating or plasma heating, the operating temperature is lower than the temperature threshold of the hot spot effect; if the heating method of the heating furnace is electric heating, fuel gas radiation heating, laser heating or electron beam heating, the hot spot effect will not be caused. Therefore, in this step, only the grid on the outlet section of the heating furnace needs to be processed, which can effectively reduce the amount of calculation and thus effectively improve the calculation efficiency.

[0057] In this embodiment of the invention, each grid on the outlet section of the heating furnace is traversed to determine whether it exceeds the target temperature range. The target temperature range in this embodiment is defined as the temperature between the lower limit of the reaction temperature reached by the heating furnace (i.e., the lower limit of the target temperature range) and the upper limit of the temperature range at which the material does not coke (the upper limit of the target temperature range). In practical applications, the target temperature range can specifically be 400℃-600℃; preferably 500-550℃.

[0058] When adjusting the heat source power of the heating furnace according to the first preset rule, the specific methods may include:

[0059] When the grid temperature is below the lower limit of the preset target temperature range, the heat source power is increased according to a first preset ratio; when the grid temperature exceeds the upper limit of the preset target temperature range, the heat source power is decreased according to the first preset ratio. The first preset ratio ranges from 2-5%; more preferably, it can be 2-3%.

[0060] In this step, after each update of the heat source power, the updated heat source power is used to return to step S13 to calculate and simulate the results again using the three-dimensional thermodynamic model, and then it is determined whether the grid exceeds the preset target temperature range.

[0061] If the initial assessment determines whether the outlet section of the heating furnace includes grids outside the preset target temperature range, and if it does not, then the feed rate may still have room for improvement. Therefore, the feed rate can be increased and updated by a certain percentage (the first preset increase percentage) to tap the heating furnace's production efficiency potential. In practical applications, the increase in the updated feed rate is a preset percentage of the feed rate before the last update, which can be 0.1-5%.

[0062] If this is not the first time determining whether the outlet section of the heating furnace includes a grid that exceeds the preset target temperature range, it indicates that the feed rate has already been adjusted and updated. If it does not include a grid that exceeds the preset target temperature range at this time, the feed rate will not be adjusted again, and the process can proceed to step S15. Specifically, to ensure that after adjusting the feed rate once, the current heat source power can still ensure that the outlet section does not include a grid that exceeds the preset target temperature range, the temperature prediction value inside the heating furnace needs to be predicted again.

[0063] S15. Based on the predicted temperature value, determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke. If yes, update the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule and return to step S13. If no, generate the heat source power control command and feed rate control command for the heating furnace based on the current heat source power and feed rate.

[0064] To ensure the effectiveness of the heating reaction in the furnace, in this embodiment of the invention, when the outlet section of the furnace does not include grids exceeding the preset target temperature range, it is necessary to iterate through the grids to determine whether, in the next time step, the furnace contains grids exceeding the preset upper limit of free coke content. The preset upper limit of free coke content can be no greater than 1% of the theoretical coking rate of the slag-reducing feedstock.

[0065] If the heating furnace contains grids with a content exceeding the preset upper limit of free coke, the heat source power and feed rate need to be increased simultaneously. The specific adjustment method (i.e., the second preset rule) can be: with the goal of keeping the temperature at the outlet section of the heating furnace constant, determine the feed rate increase value required after increasing the heat source power according to the first preset ratio; and then increase the heat source power and feed rate increase value according to the first preset ratio, and update the heat source power and feed rate respectively.

[0066] In practical applications, with the goal of maintaining a constant temperature at the outlet section of the heating furnace, the specific method for determining the required feed rate increase value after increasing the heat source power according to the first preset ratio can be as follows:

[0067] The appropriate feed rate is calculated using a three-dimensional thermodynamic model to maintain a stable temperature at the outlet section of the heating furnace after the heat source power is increased according to the first preset ratio. This appropriate feed rate is then used as the updated feed rate.

[0068] When the outlet section of the heating furnace does not exceed the grid of the target temperature range, and the heating furnace does not contain any grids exceeding the preset upper limit of free coke content, the optimal feed rate that the physical heating furnace can achieve is thus generated based on the current heat source power and feed rate to control the heating furnace to its optimal operating condition.

[0069] Furthermore, to avoid the slag-reducing raw material failing to reach the coking temperature due to excessively high feed rate, this embodiment of the invention may further include the following steps:

[0070] S16. If, at the current feed rate, after a preset number of iterations, the outlet section of the heating furnace still includes grids exceeding the preset target temperature range, or the heating furnace still includes grids exceeding the preset upper limit of free coke content, the feed rate is reduced to the value before the last update.

[0071] If, at a certain feed rate, after a preset number of iterations (i.e., after multiple updates of the heat source power), the grid still includes elements outside the preset target temperature range, it indicates that the feed rate is too fast and will affect the heating effect of the furnace on the material. Therefore, it is necessary to roll back to the previous feed rate.

[0072] In summary, this invention generates a corresponding three-dimensional thermodynamic model based on the furnace model. Using this model, the predicted temperature distribution within the furnace after a given time step can be calculated. This allows for the prediction of whether the temperature at the furnace outlet section exceeds the limit in the next long time step, enabling adjustments to the heat source power and feed rate. The three-dimensional thermodynamic model is then used again to calculate and predict whether the temperature at the furnace outlet section exceeds the limit in the next long time step until the temperature at the outlet section is within a reasonable range. This provides an accurate basis for the reasonable control of heat source power and feed rate in the next long time step.

[0073] This invention, through a working condition prediction method, can adjust the heat source power and feed rate in advance according to different working conditions, and determine the maximum feed rate under temperature control that meets the requirements of avoiding premature coking. Therefore, it can fully utilize the production efficiency of the heating furnace while ensuring that premature coking does not occur in the heating furnace.

[0074] Example 2

[0075] Corresponding to the method embodiment, another aspect of the present invention also provides a heating furnace control device for delayed coking. Figure 2 This diagram illustrates the structure of a heating furnace control device for delayed coking provided in an embodiment of the present invention. The heating furnace control device for delayed coking is... Figure 1 The device corresponding to the heating furnace control method for delayed coking described in the corresponding embodiment is implemented through a virtual device. Figure 1 The heating furnace control method for delayed coking in the corresponding embodiment can be executed by electronic devices, such as network devices, terminal devices, or servers, where each virtual module constituting the heating furnace control device for delayed coking can be executed. Specifically, the heating furnace control device for delayed coking in the embodiment of the present invention includes:

[0076] Model building unit 01 is used to generate a three-dimensional thermodynamic model of the heating furnace based on the modeling of the heating furnace and to mesh the three-dimensional thermodynamic model;

[0077] The parameter determination unit 02 is used to determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil;

[0078] The simulation result calculation unit 03 calculates the simulation results of the three-dimensional thermodynamic model based on the input parameters, with a preset time step as the calculation period; the simulation results include the predicted temperature distribution in the heating furnace after one time step.

[0079] The first judgment unit 04 is used to determine whether the outlet section position of the heating furnace includes a grid that exceeds the preset target temperature range based on the temperature prediction value. If yes, the heat source power of the heating furnace is adjusted according to the first preset rule to update the heat source power and the result is returned to the simulation calculation unit. If no, and this is the first judgment, the feed rate is adjusted according to the first preset upward adjustment ratio to update the feed rate and the result is returned to the simulation calculation unit. If no, and this is not the first judgment, the process is transferred to the second judgment unit.

[0080] The second judgment unit 05 is used to determine whether the heating furnace contains a grid that exceeds the preset upper limit of free coke content based on the temperature prediction value. If yes, the heat source power and feed rate are updated by increasing the heat source power and feed rate according to the second preset rule and the result is returned to the simulation calculation unit. If no, the heat source power control command and feed rate control command of the heating furnace are generated according to the current heat source power and feed rate.

[0081] Preferably, in this embodiment of the invention, it further includes:

[0082] The rollback unit is used to adjust the feed rate back to the value before the last update when, after a preset number of iterations at the current feed rate, the outlet section of the heating furnace includes grids that exceed the preset target temperature range, or the heating furnace still includes grids that exceed the preset upper limit of free coke content.

[0083] It should be noted that the specific implementation and technical effects of the heating furnace control device for delayed coking in the embodiments of the present invention can be found by referring to... Figure 1 The corresponding control methods for the heating furnace used in delayed coking will not be elaborated here.

[0084] Example 3

[0085] Corresponding to the method embodiments, this invention also provides a control device for a heating furnace used in delayed coking, such as a terminal or server. The server can be a standalone physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The terminal can be a smartphone, tablet, laptop, desktop computer, etc., but is not limited to these.

[0086] An example diagram of the hardware structure block diagram of the heating furnace control equipment for delayed coking provided in this application is shown below. Figure 3 As shown, it may include:

[0087] Processor 1, communication interface 2, memory 3, and communication bus 4;

[0088] The processor 1, communication interface 2, and memory 3 communicate with each other via communication bus 4.

[0089] Optionally, communication interface 2 can be an interface of a communication module, such as the interface of a GSM module;

[0090] Processor 1 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0091] Memory 3 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0092] Specifically, processor 1 is used to execute the computer program stored in memory 3 to perform the following steps:

[0093] S11. Based on the furnace modeling, generate a three-dimensional thermodynamic model of the furnace and mesh the three-dimensional thermodynamic model;

[0094] S12. Determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil;

[0095] S13. Using a preset time step as the calculation period, calculate the simulation results of the three-dimensional thermodynamic model based on the input parameters; the simulation results include the predicted temperature distribution inside the furnace after one time step.

[0096] S14. Determine whether the outlet section of the heating furnace includes a grid that exceeds the preset target temperature range based on the predicted temperature value. If yes, update the heat source power of the heating furnace by adjusting the heat source power according to the first preset rule and return to step S13. If no, and this is the first determination, update the feed rate by adjusting the feed rate according to the first preset upward adjustment ratio and return to step S13. If no, and this is not the first determination, proceed to step S15.

[0097] S15. Based on the predicted temperature value, determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke. If yes, update the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule and return to step S13. If no, generate the heat source power control command and feed rate control command for the heating furnace based on the current heat source power and feed rate.

[0098] Preferably, in this embodiment of the invention, it further includes:

[0099] S16. If, at the current feed rate, after a preset number of iterations, the outlet section of the heating furnace still includes grids exceeding the preset target temperature range, or the heating furnace still includes grids exceeding the preset upper limit of free coke content, the feed rate is reduced to the value before the last update.

[0100] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the heating furnace control method for delayed coking provided in the embodiments of the present invention.

[0101] Example 4

[0102] In this embodiment of the invention, a storage medium is also provided, which can store a program suitable for execution by a processor, the program being used for:

[0103] S11. Based on the furnace modeling, generate a three-dimensional thermodynamic model of the furnace and mesh the three-dimensional thermodynamic model;

[0104] S12. Determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil;

[0105] S13. Using a preset time step as the calculation period, calculate the simulation results of the three-dimensional thermodynamic model based on the input parameters; the simulation results include the predicted temperature distribution inside the furnace after one time step.

[0106] S14. Determine whether the outlet section of the heating furnace includes a grid that exceeds the preset target temperature range based on the predicted temperature value. If yes, update the heat source power of the heating furnace by adjusting the heat source power according to the first preset rule and return to step S13. If no, and this is the first determination, update the feed rate by adjusting the feed rate according to the first preset upward adjustment ratio and return to step S13. If no, and this is not the first determination, proceed to step S15.

[0107] S15. Based on the predicted temperature value, determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke. If yes, update the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule and return to step S13. If no, generate the heat source power control command and feed rate control command for the heating furnace based on the current heat source power and feed rate.

[0108] Preferably, in this embodiment of the invention, it further includes:

[0109] S16. If, at the current feed rate, after a preset number of iterations, the outlet section of the heating furnace still includes grids exceeding the preset target temperature range, or the heating furnace still includes grids exceeding the preset upper limit of free coke content, the feed rate is reduced to the value before the last update.

[0110] Optionally, the refined and extended functions of the program can be found in the description above.

[0111] The above-described product can execute the methods provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the methods. Technical details not described in detail in this embodiment can be found in the methods provided in other embodiments of the present invention.

[0112] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0113] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be indirect couplings or communication connections through interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0114] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0115] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0116] It should be understood that in the embodiments of this application, the claims, various embodiments, and features can be combined with each other to solve the aforementioned technical problems.

[0117] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0118] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling a heating furnace for delayed coking, characterized in that, Including the following steps: S11. Based on the furnace modeling, generate a three-dimensional thermodynamic model of the furnace and mesh the three-dimensional thermodynamic model; S12. Determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue oil; S13. Using a preset time step as the calculation period, calculate the simulation results of the three-dimensional thermodynamic model based on the input parameters; the simulation results include the predicted temperature distribution inside the furnace after one time step. S14. Determine whether the outlet section of the heating furnace includes a grid exceeding the preset target temperature range based on the predicted temperature value. If yes, update the heat source power of the heating furnace by adjusting the heat source power according to the first preset rule and return to step S13. If no, and this is the first determination, update the feed rate by adjusting the feed rate by the first preset upward adjustment ratio and return to step S13. If no, and this is not the first determination, proceed to step S15. The adjustment of the heat source power of the heating furnace according to the first preset rule includes: when the grid is lower than the lower limit temperature value of the preset target temperature range, increasing the heat source power according to the first preset ratio; the value range of the first preset ratio includes 2-5%; when the grid exceeds the upper limit temperature value of the preset target temperature range, decreasing the heat source power according to the first preset ratio. S15. Based on the predicted temperature value, determine whether the heating furnace contains grids exceeding the preset upper limit of free coke content. If yes, update the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule and return to step S13; if no, generate the heat source power control command and feed rate control command for the heating furnace based on the current heat source power and feed rate. The step of updating the heat source power and feed rate by increasing the heat source power and feed rate according to the second preset rule includes: determining the feed rate increase value required after increasing the heat source power according to the first preset ratio, with the goal of keeping the temperature at the outlet section of the heating furnace constant; and updating the heat source power and feed rate according to the increase value of the heat source power and feed rate according to the first preset ratio.

2. The heating furnace control method for delayed coking according to claim 1, characterized in that, Also includes: S16. If, at the current feed rate, after a preset number of iterations, the outlet section of the heating furnace still includes grids exceeding the preset target temperature range, or the heating furnace still includes grids exceeding the preset upper limit of free coke content, the feed rate is reduced to the value before the last update.

3. The heating furnace control method for delayed coking according to claim 1 or 2, characterized in that, The step of modeling the heating furnace, generating a three-dimensional thermodynamic model of the heating furnace, and meshing the three-dimensional thermodynamic model includes: Let the inner diameter of the heating furnace be R. h The pipe length is H h The meshed three-dimensional thermodynamic model has β meshes and is stored in a set. In, where the set belongs to The temperature of the j-th grid is T j The free coke content is Char j .

4. The heating furnace control method for delayed coking according to claim 3, characterized in that, The mesh of the three-dimensional thermodynamic model includes: One or more of the following: tetrahedral mesh, hexahedral mesh, pyramidal mesh, wedge mesh, and polyhedral mesh.

5. The heating furnace control method for delayed coking according to claim 4, characterized in that, The calibration methods for the three-dimensional thermodynamic model include: One or more of the following: general physics, fluid dynamics, plasma, and semiconductors.

6. The heating furnace control method for delayed coking according to claim 1 or 2, characterized in that, The heating method of the heating furnace includes: One or more of the following: electric heating, fuel gas radiation heating, microwave heating, plasma heating, laser heating, and electron beam heating; The heat source power of the heating furnace is the heat power required when the heating furnace directly or indirectly heats the slag-reducing raw materials.

7. The method for controlling a heating furnace for delayed coking according to claim 1 or 2, characterized in that, The target temperature range includes: The lower limit temperature is 400℃ to the upper limit temperature is 600℃.

8. The heating furnace control method for delayed coking according to claim 1, characterized in that, The first preset adjustment ratio ranges from 0.1% to 5%.

9. A heating furnace control device for delayed coking, used to implement the heating furnace control method for delayed coking as described in claim 1, characterized in that, include: The model building unit is used to generate a three-dimensional thermodynamic model of the heating furnace based on the modeling of the heating furnace and to mesh the three-dimensional thermodynamic model; The parameter determination unit is used to determine the input parameters of the three-dimensional thermodynamic model, including: the heat source power of the heating furnace, and the physical properties and feed rate of the vacuum residue. The simulation result calculation unit calculates the simulation results of the three-dimensional thermodynamic model based on the input parameters, with a preset time step as the calculation period; the simulation results include the predicted temperature distribution in the heating furnace after one time step. The first judgment unit is used to determine whether the outlet section position of the heating furnace includes a grid that exceeds the preset target temperature range based on the temperature prediction value. If yes, the heat source power of the heating furnace is adjusted according to the first preset rule to update the heat source power and the result is returned to the simulation calculation unit. If no, and this is the first judgment, the feed rate is adjusted according to the first preset increase ratio to update the feed rate and the result is returned to the simulation calculation unit. If no, and this is not the first judgment, the process is transferred to the second judgment unit. The second judgment unit is used to determine whether the heating furnace contains a grid with a content exceeding the preset upper limit of free coke based on the temperature prediction value. If yes, the heat source power and feed rate are updated by increasing the heat source power and feed rate according to the second preset rule and the result is returned to the simulation calculation unit. If no, the heat source power control command and feed rate control command of the heating furnace are generated based on the current heat source power and feed rate.

10. The heating furnace control method for delayed coking according to claim 9, characterized in that, Also includes: The rollback unit is used to adjust the feed rate back to the value before the last update when, after a preset number of iterations at the current feed rate, the outlet section of the heating furnace includes grids that exceed the preset target temperature range, or the heating furnace still includes grids that exceed the preset upper limit of free coke content.

11. A control device for a heating furnace used in delayed coking, characterized in that, include: Memory, used to store computer programs; A processor for invoking and executing the computer program to implement the steps of the heating furnace control method for delayed coking as described in any one of claims 1-8.

12. A storage medium, characterized in that, Includes software programs adapted for a processor to execute the steps of the heating furnace control method for delayed coking as described in any one of claims 1-8.

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