Biomass pyrolysis reforming reactor control method, device, equipment and storage medium

Abstract

The application discloses a biomass pyrolysis reforming reactor control method, device, equipment and storage medium, the method comprises the steps that a three-dimensional electromagnetic field model is generated and gridding; input parameters of the three-dimensional electromagnetic field model are determined; simulation results of the three-dimensional electromagnetic field model under steady state are obtained according to the input parameters; whether each temperature control area includes an out-of-limit grid exceeding the gas-solid component threshold after a time step is judged, if yes, the minimum intake of the controllable water vapor injection hole is calculated and updated; whether each temperature control area includes an out-of-limit grid exceeding the target temperature range after a time step is judged, if yes, the microwave power and / or the intake are calculated and updated, if not, control instructions of the control valve and the microwave power are generated; the application can effectively improve the response speed of the biomass pyrolysis reforming reactor control by the working condition prediction mode, and then improve the control effect.

Description

Technical Field

[0001] This invention relates to the field of chemical processes, and in particular to control methods, apparatus, equipment and storage media for biomass pyrolysis reforming reactors. Background Technology

[0002] Biomass pyrolysis, generally speaking, refers to the process in which biomass is heated to a high temperature under anaerobic or low-oxygen conditions, causing molecular decomposition to produce coke, condensable liquids, and gaseous products. It is an important form of biomass energy utilization. Steam reforming, generally speaking, refers to the process of producing syngas from hydrocarbons or fixed carbon under the action of steam.

[0003] Since biomass pyrolysis produces some tar and hydrocarbon gaseous products, it is necessary to use steam reforming at high temperatures to carry out secondary reactions on these substances in order to redirect the production of the desired gaseous products.

[0004] In existing technologies, a multi-reactor setup is generally used, that is, connecting different reactors to perform biomass pyrolysis and steam reforming separately.

[0005] The inventors discovered through research that the existing technology using a multi-reactor setup has at least the following drawbacks:

[0006] In multi-reactor designs, material transfer is required, which can easily lead to additional energy loss and increase process complexity, making it unsuitable for industrial applications.

[0007] 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

[0008] The purpose of this invention is to save energy consumption in the biomass pyrolysis and reforming process and simplify the complexity of the process.

[0009] This invention provides a method for controlling a biomass pyrolysis reforming reactor, comprising the following steps:

[0010] S11. Generate a corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis reforming reactor and perform meshing; the biomass pyrolysis reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake;

[0011] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feeding rate.

[0012] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step; the tubular reactor includes multiple logically divided temperature control zones; each temperature control zone corresponds to its own gas-solid component threshold and target temperature range; the target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis; the target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming.

[0013] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step. If so, calculate the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located, and return to step S13 as the updated air intake.

[0014] S15. Based on the predicted temperature field distribution value, determine whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If yes, calculate the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and return to step S13 as the updated microwave power and / or air intake. If no, use the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

[0015] Preferably, in this invention, it further includes:

[0016] S16. Update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and return to step S13;

[0017] S17. If, at the current feed rate, the number of calculation cycles still exceeds the allowable grid, the feed rate is rolled back to the value before the last update.

[0018] In another aspect of the present invention, a biomass pyrolysis reforming reactor control device is also provided, comprising:

[0019] Memory, used to store computer programs;

[0020] A processor is used to invoke and execute the computer program to implement the various steps of the biomass pyrolysis reforming reactor control method as described in any of the preceding claims.

[0021] 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 biomass pyrolysis reforming reactor control method as described in any of the preceding claims.

[0022] The biomass pyrolysis reforming reactor control device includes a computer program stored on a medium. The computer program includes program instructions. When the program instructions are executed by the computer, the computer performs the methods described in the above aspects and achieves the same technical effect.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In this invention, the tubular reactor includes both a pyrolysis section at the front and a reforming section at the rear. This allows for the separate setting of the required reaction temperatures for each section by controlling the microwave power of a controllable microwave source. Furthermore, the invention utilizes a hollow feed screw shaft to provide steam branch pipes, which then deliver steam to the reforming section through steam nozzles on the screw shaft, thus meeting the steam requirements for steam reforming. Since the pyrolysis and reforming processes are implemented within a single tubular reactor, compared to the multi-reactor setups of existing technologies, this invention effectively saves energy and simplifies equipment and process complexity.

[0025] Furthermore, in this invention, a three-dimensional electromagnetic field model can be generated based on the modeling of the tubular reactor. Then, by predicting the temperature field distribution and gas-solid component distribution within the tubular reactor, the appropriate injection area and injection volume of each water vapor nozzle, as well as the appropriate microwave power of each controllable microwave source, can be calculated in advance.

[0026] Furthermore, in this invention, water vapor can be transported in the pyrolysis section through water vapor nozzles on the feed screw shaft. In this way, the occurrence of hot spot effect during pyrolysis can be avoided by spraying water vapor to cool down, thereby improving the process stability of biomass pyrolysis.

[0027] 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

[0028] 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.

[0029] Figure 1 This is a flowchart illustrating the steps of the biomass pyrolysis reforming reactor control method described in this invention;

[0030] Figure 2 This is a schematic diagram of the structure of the biomass pyrolysis reforming reactor described in this invention;

[0031] Figure 3 This is a schematic diagram of the structure of the biomass pyrolysis reforming reactor control device described in this invention;

[0032] Figure 4 This is a schematic diagram of the control equipment structure of the biomass pyrolysis reforming reactor described in this invention. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] To save energy consumption in the biomass pyrolysis and reforming process and simplify the process complexity, such as... Figure 1 As shown, an embodiment of the present invention provides a method for controlling a biomass pyrolysis reforming reactor, comprising the following steps:

[0038] S11. Generate a corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis reforming reactor and perform meshing; the biomass pyrolysis reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake;

[0039] It should be noted that the control method in the embodiments of the present invention is applicable to specific biomass pyrolysis and reforming reactors, such as... Figure 2 As shown, the tubular reactor 01 in the biomass pyrolysis and reforming reactor includes a pyrolysis section at the front and a reforming section at the rear, thus completing both pyrolysis and reforming processes within a single reactor. The specific structure of the biomass pyrolysis and reforming reactor may include pyrolysis and reforming equipment, a discharge tower 02, and control equipment 03. The pyrolysis and reforming equipment includes a feed screw shaft 11, a microwave heating chamber 12, and a microwave generator equipped with multiple controllable microwave sources 13. The material is conveyed by the feed screw shaft 11 through the tubular reactor 01 within the microwave heating chamber 12, heated by the microwave generator, and then falls into the discharge tower 03. The tubular reactor 01 includes a pyrolysis section at the front and a reforming section at the rear.

[0040] The feed screw shaft 11 has a hollow shaft design and multiple steam nozzles are provided at the corresponding positions in the reforming section; steam branch pipes are connected to each steam nozzle from the inner cavity of the shaft; each steam branch pipe, which is equipped with a control valve 14, merges into the main steam pipe 15 and is connected to the steam generator 16 through a dynamic sealing mechanism; the control device 03 executes the controllable microwave source 13, the feed screw shaft 11 and the control valve 14 according to the control instructions.

[0041] In this embodiment of the invention, the microwave heating cavity has an outer wall made of metal and is sealed to the microwave waveguide, while the internal space of the cavity is connected to the internal space of the microwave waveguide. A tubular reactor can be horizontally placed inside the microwave heating cavity for heating and transporting materials. In practical applications, the wall of the tubular reactor can be sealed to the material feed hopper and the microwave heating cavity to prevent leakage of materials and their reaction products. Simultaneously, the internal space of the tubular reactor is connected to the space of the material feed hopper, but not to the space inside the microwave heating cavity.

[0042] In this embodiment of the invention, the feed screw shaft 11 has a hollow design and multiple steam jet holes. A drive motor is connected to the front end of the feed screw shaft 11 to drive its rotation. When the material enters the feed hopper, the motor drives the feed screw shaft 11 to rotate clockwise around its axis. While mixing the material, the screw blades can also scrape the carbonized residue on the tubular reactor wall after the material reaction at high temperature, preventing material blockage. Multiple steam branch pipes connected to steam nozzles are inserted into the inner cavity of the feed screw shaft 11 from the other end of the shaft body. Each steam branch pipe extends out of the shaft body and merges into a steam main pipe 15. Each steam branch pipe is also equipped with an electrically controlled valve 14 to control the injection timing and injection volume of each steam nozzle. The steam main pipe 15 is connected to the steam generator 16 through a dynamic sealing mechanism. In this way, during the rotation of the feed screw shaft 11, the steam branch pipes and the steam main pipe 16 will rotate synchronously, while the steam generator 16 at the other end of the dynamic sealing mechanism will not rotate. The steam generator 16 can continuously supply steam to the steam main pipe 15 during the rotation of the feed screw shaft 11.

[0043] Since the tubular reactor 01 is entirely connected to the microwave heating chamber 12, the disassembly part of the feed screw shaft 11 is located on the drive motor side. Furthermore, to ensure no microwave leakage within the chamber, a metal-contact dynamic seal is typically used. It should be noted that this detachable design also facilitates equipment maintenance should blockages occur during material transmission within the microwave heating chamber 12.

[0044] In this embodiment of the invention, the control device may specifically include a control mechanism for a controllable microwave source, a control mechanism for a feeding screw shaft, and a control mechanism for a control valve. These control mechanisms can all execute corresponding control actions according to the corresponding control commands. For example, they can control the microwave power of each controllable microwave source, the start / stop and rotation speed of the feeding screw shaft, and the opening / closing and injection volume of the control valve.

[0045] In this embodiment of the invention, the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear. When biomass enters the tubular reactor, it first reaches the pyrolysis section. There, a controllable microwave source heats the material at a temperature suitable for pyrolysis (generally greater than 1000 degrees Celsius). Then, it enters the reforming section, where a controllable microwave source heats it at a temperature suitable for steam pyrolysis (generally between 500 and 800 degrees Celsius). Simultaneously, steam is supplied for reforming through steam nozzles. In this embodiment, the feed screw shaft may also have multiple steam nozzles at positions corresponding to the pyrolysis section. This allows for timely cooling by injecting steam to prevent hot spots during pyrolysis, thus improving the stability of the pyrolysis process.

[0046] Based on the above-mentioned biomass pyrolysis and reforming reactor, this embodiment of the invention provides a control method to save energy consumption in the biomass pyrolysis and reforming process and simplify the complexity of the process.

[0047] When generating and meshing a corresponding three-dimensional electromagnetic field model based on a biomass pyrolysis reforming reactor, specific steps may include:

[0048] Let the internal volume of the tubular reactor be V; the number of controllable microwave sources be n; and the number of controllable steam inlets be m.

[0049] Let the power of the k-th controllable microwave source be P. k The total power of the microwave generator is

[0050] Let Q be the air intake volume of the k-th controllable steam nozzle. k The total intake volume of water vapor is

[0051] The meshed 3D electromagnetic field model has d meshes and is stored in a set Mesh, where the electromagnetic intensity of the j-th mesh belonging to the set Mesh is E. j The temperature is T j .

[0052] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feeding rate.

[0053] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step; the tubular reactor includes multiple logically divided temperature control zones; each temperature control zone corresponds to its own gas-solid component threshold and target temperature range; the target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis; the target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming.

[0054] With the values ​​of each input parameter as input, the predicted values ​​of temperature field and gas-solid composition of each grid in the tubular reactor after a time step can be obtained through the three-dimensional electromagnetic field model. In other words, the predicted values ​​of temperature field distribution and gas-solid composition distribution of the tubular reactor can be obtained.

[0055] In this embodiment of the invention, a temperature control zone was also divided to calculate the predicted values ​​of temperature field distribution and gas-solid component distribution, respectively, using the temperature control zone as a unit.

[0056] The temperature control zone can be divided in two ways: either by dividing the tubular reactor into multiple temperature control zones at equal intervals based on its length, or by dividing the temperature control zones into multiple temperature control zones based on the temperature rise curve from front to back within the tubular reactor, using a method of equal temperature difference; for example, in the pyrolysis section and the reforming section, each position with a temperature increase of 50°C can be used as a division position for a temperature control zone.

[0057] In practical applications, the specific number of temperature control zones can be set by those skilled in the art based on the length of the tubular reactor or the temperature span within the tubular reactor, preferably ranging from 5 to 40.

[0058] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step. If so, calculate the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located, and return to step S13 as the updated air intake.

[0059] In this embodiment of the invention, it is not only necessary to simulate the temperature distribution data and gas-solid composition data inside the chamber based on the operating conditions of the tubular reactor, but also to determine the corresponding control scheme based on the predicted values ​​of the temperature field distribution and gas-solid composition distribution inside the chamber of the tubular reactor.

[0060] The larger the gas-solid composition, the smaller the amount of effective components produced. In order to ensure gas production efficiency, in this embodiment of the invention, it is necessary to first limit the minimum value of the air intake of the controllable steam nozzle (i.e., the minimum air intake) to ensure the amount of steam required for the steam reforming process; and then, under this constraint, the microwave power of the controllable microwave source and the air intake of the controllable steam inlet are regulated.

[0061] When the temperature control zone includes grids exceeding the gas-solid component threshold, it indicates that the amount of water vapor in that zone is insufficient. Before adjusting the water vapor intake and microwave power, it is necessary to first determine the minimum intake of the controllable water vapor nozzle to avoid insufficient intake.

[0062] The specific steps for calculating the minimum air intake of the controllable steam nozzle corresponding to the temperature control zone can be as follows:

[0063] Traverse all grids in the temperature control zone. If a grid exceeding the target gas-solid composition threshold is found during the traversal, extract the gas-solid composition data of the grid exceeding the target gas-solid composition threshold and store it in the data set sum.

[0064] After the traversal is complete, the data in the dataset `sum` are summed. Finally, the summation result is substituted into the reforming reaction model to obtain the amount of water vapor required to consume the gas-solid components to the target gas-solid component threshold. This amount is the minimum inlet flow rate Q of the controllable water vapor nozzle corresponding to the grid that exceeds the target gas-solid component threshold. min .

[0065] S15. Based on the predicted temperature field distribution value, determine whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If yes, calculate the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and return to step S13 as the updated microwave power and / or air intake. If no, use the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

[0066] When the temperature control zone includes grids exceeding the target temperature range, it indicates that the microwave power and rate of the controllable steam nozzle of the controllable microwave source need to be adjusted, and the air intake of the controllable steam nozzle of the controllable microwave source needs to be calculated. Specifically, this includes:

[0067] For each of the aforementioned temperature control zones:

[0068] S21. Based on the three-dimensional electromagnetic field model, obtain the current microwave power of each controllable microwave source and the current air intake of each controllable water vapor nozzle at the first time step when the material enters the temperature control zone.

[0069] For each temperature control zone, at the beginning of a calculation cycle, when the material just enters, the current microwave power of each controllable microwave source and the current air intake of each controllable steam nozzle in that temperature control zone are used as parameters for temperature prediction in the three-dimensional electromagnetic field model.

[0070] S22. Traverse the maximum temperature point of the grid in the temperature control zone. If the maximum temperature point exceeds the upper limit of the target temperature range, store the grid identifier and temperature data corresponding to the maximum temperature point into the database DB1.

[0071] To determine whether the temperature control zone includes grids exceeding the upper limit of the target temperature range, and to identify which grids exceed the upper limit of the target temperature range, this embodiment of the invention employs a traversal approach to determine the maximum temperature point of each grid within the temperature control zone. When the maximum temperature point exceeds the upper limit of the target temperature range, the grid identifier and temperature data corresponding to the maximum temperature point are stored in database DB1. The same determination is then performed on the remaining grids to select all grids that exceed the upper limit of the target temperature range, i.e., all grids whose temperature exceeds the limit in the next time step. These grids are then stored in database DB1.

[0072] S23. Traverse the minimum temperature point of the grid in the temperature control zone. If the minimum temperature point exceeds the lower limit of the target temperature range, store the grid identifier and temperature data corresponding to the minimum temperature point into the database DB2.

[0073] To prevent issues such as excessive water vapor leading to a slower material heating rate, this embodiment of the invention also determines whether the temperature control zone includes grids exceeding the lower limit of the target temperature range, and identifies which grids are below the lower limit. This embodiment employs a traversal approach to determine the minimum temperature point of each grid within the temperature control zone. When this minimum temperature point is below the lower limit of the target temperature range, the grid identifier and temperature data corresponding to that minimum temperature point are stored in database DB2. The same determination is then performed on the remaining grids to select all grids below the lower limit of the target temperature range—that is, all grids whose temperature will not meet the target in the next time step—and these grids are stored in database DB2.

[0074] It should be noted that, in the embodiments of the present invention, the upper and lower limits of the target temperature range corresponding to each temperature control zone can be set according to the actual needs of the process.

[0075] S24. Based on the heat conduction equation, establish an implicit function F through the enthalpy of reaction ΔH, satisfying F((E) x-j E y-j E z-j ), q i ) = 0;

[0076] Where j is the grid number, i is the temperature control zone number; x and y represent the three axes; the electric field intensity component along the x-axis is E. x-j The electric field intensity component along the y-axis is E y-j The electric field intensity component along the z-axis is E z-j ;q i The required air intake range for the temperature control zone;

[0077] In practical applications, for a given grid j, the microwave irradiation it receives can be considered as the vector sum of microwave irradiations from the x, y, and z axes, respectively. Therefore, when analyzing only the change in electric field intensity along the x-axis, for convenience, the electric field intensity component along the x-axis is called E. x-j Similarly, the electric field intensity components E along the y-axis and z-axis can be obtained. y-j E z-j ;

[0078] In this embodiment of the invention, due to the above-mentioned electric field strength component range E x-j E y-j E z-j The solution is based on the target temperature condition, and therefore may not meet the gas-solid composition conditions required by the process. Therefore, the purpose of establishing the implicit function F is to ensure that the components of the electric field intensity on the xyz axes are compatible with the required air intake range q in the temperature control zone. i To ensure consistency in heat transfer.

[0079] S25. For the grid currently stored in the database DB1, based on Maxwell's equations and the implicit function F, simultaneously solve for the range E of the controllable electric field intensity component that ensures the maximum temperature of the biomass within the grid in the temperature-controlled zone does not exceed the upper limit of the target temperature range during the remaining residence time. x-j E y-j E z-j ;

[0080] For the grid currently stored in the database DB2, based on Maxwell's equations and the implicit function F, simultaneously solve for the range E of the controllable electric field intensity components that ensure the minimum temperature of the biomass within the grid in the temperature-controlled zone during the remaining residence time is not lower than the lower limit of the target temperature range. x-j E y-j E z-j ;

[0081] Specifically, for a grid j in database DB1, assuming it is only irradiated by microwaves along the x-axis, the electric field intensity components along the other two axes are 0. At this time, the maximum temperature of grid j during the remaining residence time is equal to the upper limit of the target temperature range. The electric field intensity component along the x-axis at this time is called E. x-j The theoretical maximum value is E xj-max Similarly, we can obtain E. y-j E z-j The maximum value E yj-max E zj-max Then, according to E x-j E y-j E z-j By combining the maximum value and Maxwell's equations with the coordinates of grid j within the cavity, E is established. x-j E y-j E z-j The planar triangular coordinate system is the range of controllable electric field intensity components for grid j, where the maximum temperature of grid j during the remaining residence time does not exceed the upper limit of the target temperature range of the temperature control zone.

[0082] For a specific grid j in database DB2, assuming it is only irradiated by microwaves along the x-axis, the electric field intensity components along the other two axes are 0. At this point, the minimum temperature of grid j during the remaining residence time is equal to the lower limit of the target temperature range. The electric field intensity component along the x-axis at this point is called E. x-j The theoretical minimum value is E xj-min Similarly, we can obtain E. y-j E z-j Minimum value E yj-min E zj-min Then, according to E x-j E y-j E z-j By combining the minimum value and Maxwell's equations with the coordinates of grid j within the cavity, E is established. x-j E y-j E z-j The planar triangular coordinate system is the range of controllable electric field intensity components for grid j, where the minimum temperature of grid j during the remaining residence time does not exceed the lower limit of the target temperature range of the temperature control zone.

[0083] S26, When the required steam intake volume range q i The minimum value is not greater than the minimum water vapor intake rate Q. i-min Furthermore, the steam intake range q i The maximum value is not less than the minimum water vapor intake rate Q. i-min Q i-min The value assigned to q i The minimum value, and then the updated water vapor intake range q iThe range of water vapor intake q at the current step size i And return to step S24;

[0084] When the required water vapor intake volume range is q i The minimum value is greater than the minimum water vapor intake Q. i-min Q i-min The value assigned to q i Then, the updated water vapor intake range q i The range of water vapor intake q at the current step size i And return to step S24;

[0085] In practical applications, the controllable electric field intensity component range obtained in step S25, where the maximum temperature of the grid in database DB1 does not exceed the upper limit of the target temperature range of the temperature control zone during the remaining residence time, is read and substituted into the implicit function F to obtain the water vapor intake range q. i-db1 Read the controllable electric field intensity component range obtained in step S25 for the grid in database DB2, where the minimum temperature during the remaining residence time does not exceed the lower limit of the target temperature range of the temperature control zone, and substitute it into the implicit function F to obtain the water vapor intake range q. i-db2 ; then q i-db1 and q i-db2 The intersection of these values ​​is used as the range of water vapor intake q at that time step. i ;

[0086] In practical applications, if q i-db1 and q i-db2 If the intersection of q and q is empty, then q i-db1 and q i-db2 The data in the table are compared, and the larger value is taken as the range of water vapor intake q at that time step. i .

[0087] S27. After obtaining the controllable electric field intensity component range of all grids in the databases DB1 and DB2, decompose the forward waves transmitted by all controllable microwave sources belonging to the temperature control zone through the array waveguide. The components of the forward wave of the k-th controllable microwave source in the three directions are as follows:

[0088] S28. Traverse all possibilities of the components of the controllable microwave source belonging to the temperature control zone at the next time step, and couple them with the components of other temperature control zones to obtain the set of optimal electric field intensity components that satisfy the judgment rules for all grids in DB1 and DB2. The total power of the current temperature control zone corresponding to this set is P. i Call the implicit function F to solve for the optimal set of electric field intensity components. The corresponding range of total water vapor intake Q in the current temperature control zone i Based on this range, the air intake of the controllable steam inlet to which the temperature control zone belongs can be adjusted accordingly.

[0089] Specifically, assuming the next time step is t, for the k controllable microwave sources belonging to the current temperature control zone, the components of their forward waves in the three directions are as follows: For a controllable microwave source not belonging to the current temperature control zone, if it is closer to the outlet direction than the current temperature control zone, then the components of its forward wave in the three directions and the components at time step t are consistent with the components at time step t-1. In this embodiment of the invention, it is necessary to traverse all possibilities of the components of the controllable microwave source belonging to the current temperature control zone at time step t, that is, it is necessary to traverse the E values ​​related to DB1 and DB2. x-j E y-j E z-j Using a planar triangular coordinate system, and taking all possibilities at their intersection, this set is superimposed with the components of the forward wave in three directions from outside the current temperature control zone. This results in the optimal electric field intensity component set that ensures the maximum temperature of the grid in DB1 during the remaining dwell time does not exceed the upper limit of the target temperature range within its temperature control zone, while simultaneously ensuring the minimum temperature of the grid in DB2 during the remaining dwell time does not fall below the lower limit of the target temperature range. Obtaining the optimal set of electric field intensity components Then, the total water vapor intake Q of the temperature control zone can be obtained according to the implicit function F. i The optimal range;

[0090] For all possibilities of the components of the controllable microwave source in the current temperature control zone at the current time step t, For example, the specific method of obtaining it is as follows:

[0091] Let M be the number of microwave sources belonging to the current temperature control zone. For the set of M controllable electric field intensity component ranges M... E ={E x-1 E x-2 ,……E x-M}, from the first element E x-1 Begin the traversal. Each traversal involves visiting all elements that intersect with the given element, recording the maximum number of elements in an empty array `a`, and recording the corresponding intersection interval in an empty matrix `b`. Finally, compare the maximum number of elements in each traversal result; the largest number in array `a` satisfies the condition, and the corresponding intersection interval in matrix `b` is the condition. The range of values.

[0092] then, and The method of obtaining and Similarly, I will not go into details here.

[0093] After obtaining the optimal set of electric field intensity components The total power of the current temperature control zone corresponding to this set is P. i The microwave power of the controllable microwave source in the temperature control zone is adjusted accordingly; the implicit function F is called to solve for the optimal set of electric field intensity components. The corresponding total water vapor intake Q in the current temperature control zone i .

[0094] After calculating the microwave power and air intake of the controllable steam nozzle of the controllable microwave source adapted to the out-of-standard grid, the updated microwave power and air intake are used as the basis for the step of calculating the temperature field distribution and gas-solid component distribution through the three-dimensional electromagnetic field model. This process continues until no grid exceeds the gas-solid component threshold and target temperature range. Then, the current microwave power is set as the target microwave power, and control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone of the out-of-standard grid area are generated.

[0095] In summary, in this embodiment of the invention, the tubular reactor includes both a pyrolysis section at the front and a reforming section at the rear. This allows the required reaction temperatures for each section to be set separately by controlling the microwave power of a controllable microwave source. Furthermore, this embodiment utilizes a hollow feed screw shaft to provide steam branch pipes, and steam is then delivered to the reforming section through steam nozzles on the feed screw shaft, thus replenishing the steam required for steam reforming. Since the pyrolysis and reforming processes in this embodiment are implemented within a single tubular reactor, compared to the multi-reactor setups in existing technologies, this invention effectively saves energy and simplifies the complexity of the equipment and processes.

[0096] Furthermore, in this embodiment of the invention, a three-dimensional electromagnetic field model can be generated based on the tubular reactor model. Then, by predicting the temperature field distribution and gas-solid component distribution within the tubular reactor, the appropriate injection area and injection volume of each steam nozzle, as well as the appropriate microwave power of each controllable microwave source, can be calculated in advance, thereby achieving effective control of the biomass pyrolysis reforming reactor.

[0097] Furthermore, in this embodiment of the invention, water vapor can also be transported in the pyrolysis section through water vapor nozzles on the feed screw shaft. In this way, the occurrence of hot spot effect during pyrolysis can be avoided by spraying water vapor to cool down, thereby improving the process stability of biomass pyrolysis.

[0098] Furthermore, in order to fully utilize the production efficiency of the biomass pyrolysis reforming reactor, the embodiments of the present invention may also include the following steps;

[0099] S16. Update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and return to step S13.

[0100] When no grid exceeds the gas-solid component threshold and target temperature range, there is a possibility that the material feed rate is too low. In order to make full use of the production efficiency of the biomass pyrolysis reforming reactor, the speed of the feed screw shaft can be increased again on a trial basis. Then, under the new operating conditions (i.e., the operating conditions with increased material feed rate), the predicted values ​​of temperature field distribution and gas-solid component distribution in the tubular reactor can be calculated again.

[0101] S17. If, at the current feed rate, the number of calculation cycles still exceeds the allowable grid, the feed rate is rolled back to the value before the last update.

[0102] If, after multiple calculation cycles, a trial increase in the feed screw shaft speed still results in exceeding the allowed grid range, it indicates that the initial speed before the increase was already the fastest possible. Therefore, the feed rate needs to be rolled back to the value before the last update, and this value should be used as the feed screw shaft speed. A corresponding control command for the feed screw shaft speed should then be generated.

[0103] Example 2

[0104] Corresponding to the method embodiment, another aspect of the present invention also provides a control device for a biomass pyrolysis reforming reactor. Figure 3 This diagram illustrates the structure of a biomass pyrolysis reforming reactor control device provided in an embodiment of the present invention. The biomass pyrolysis reforming reactor control device is... Figure 1 The device corresponding to the biomass pyrolysis reforming reactor control method described in the corresponding embodiment is implemented through a virtual device. Figure 1 In the corresponding embodiment of the biomass pyrolysis reforming reactor control method, the various virtual modules constituting the biomass pyrolysis reforming reactor control device can be executed by electronic devices, such as network devices, terminal devices, or servers. Specifically, the biomass pyrolysis reforming reactor control device in this embodiment of the invention includes:

[0105] Model building unit 01 is used to generate a corresponding three-dimensional electromagnetic field model and mesh it based on the biomass pyrolysis reforming reactor; the biomass pyrolysis reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake.

[0106] The parameter determination unit 02 is used to determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable water vapor nozzle, and the physical property parameters of biomass and water vapor and the material feeding rate.

[0107] The simulation calculation unit 03 is used to obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters, with a preset time step as the calculation period. The simulation results include the predicted values ​​of the temperature field distribution and the gas-solid component distribution in each temperature control zone of the tubular reactor after one time step. The tubular reactor includes multiple logically divided temperature control zones. Each temperature control zone corresponds to its own gas-solid component threshold and target temperature range. The target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis. The target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming.

[0108] The minimum air intake calculation unit 04 is used to determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step based on the predicted gas-solid component distribution value. If so, it calculates the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located and returns it to the simulation calculation unit as the updated air intake.

[0109] The control command generation unit 05 is used to determine, based on the predicted temperature field distribution value, whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If so, it calculates the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and returns it as the updated microwave power and / or air intake to the simulation calculation unit. If not, it uses the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

[0110] Preferably, in this embodiment of the invention, it further includes:

[0111] The rollback adjustment unit is used to update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and returning it to the simulation calculation unit; if the feed rate still includes out-of-range grids after a preset number of calculation cycles at the current feed rate, the feed rate is rolled back to the value before the last update.

[0112] It should be noted that the specific implementation and technical effects of the biomass pyrolysis reforming reactor control device in the embodiments of the present invention can be found by referring to... Figure 1 The corresponding control methods for biomass pyrolysis reforming reactors will not be elaborated here.

[0113] Example 3

[0114] Corresponding to the method embodiments, this invention also provides a control device for a biomass pyrolysis reforming reactor, 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.

[0115] An example diagram of the hardware structure block diagram of the biomass pyrolysis reforming reactor control equipment provided in this application is shown below. Figure 4 As shown, it may include:

[0116] Processor 1, communication interface 2, memory 3, and communication bus 4;

[0117] The processor 1, communication interface 2, and memory 3 communicate with each other via communication bus 4.

[0118] Optionally, communication interface 2 can be an interface of a communication module, such as the interface of a GSM module;

[0119] 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.

[0120] Memory 3 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0121] Specifically, processor 1 is used to execute the computer program stored in memory 3 to perform the following steps:

[0122] S11. Generate a corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis reforming reactor and perform meshing; the biomass pyrolysis reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake;

[0123] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feeding rate.

[0124] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step; the tubular reactor includes multiple logically divided temperature control zones; each temperature control zone corresponds to its own gas-solid component threshold and target temperature range; the target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis; the target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming.

[0125] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step. If so, calculate the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located, and return to step S13 as the updated air intake.

[0126] S15. Based on the predicted temperature field distribution value, determine whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If yes, calculate the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and return to step S13 as the updated microwave power and / or air intake. If no, use the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

[0127] Preferably, in this invention, it further includes:

[0128] S16. Update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and return to step S13;

[0129] S17. If, at the current feed rate, the number of calculation cycles still exceeds the allowable grid, the feed rate is rolled back to the value before the last update.

[0130] 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 biomass pyrolysis reforming reactor control method provided in the embodiments of the present invention.

[0131] Example 4

[0132] 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:

[0133] S11. Generate a corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis reforming reactor and perform meshing; the biomass pyrolysis reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake;

[0134] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feeding rate.

[0135] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step; the tubular reactor includes multiple logically divided temperature control zones; each temperature control zone corresponds to its own gas-solid component threshold and target temperature range; the target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis; the target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming.

[0136] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step. If so, calculate the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located, and return to step S13 as the updated air intake.

[0137] S15. Based on the predicted temperature field distribution value, determine whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If yes, calculate the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and return to step S13 as the updated microwave power and / or air intake. If no, use the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

[0138] Preferably, in this invention, it further includes:

[0139] S16. Update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and return to step S13;

[0140] S17. If, at the current feed rate, the number of calculation cycles still exceeds the allowable grid, the feed rate is rolled back to the value before the last update.

[0141] Optionally, the refined and extended functions of the program can be found in the description above.

[0142] 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.

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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 biomass pyrolysis reforming reactor, characterized in that, Including the following steps: S11. Generate a corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis and reforming reactor and mesh it; the biomass pyrolysis and reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the feed screw shaft is hollow and equipped with multiple controllable steam nozzles with controllable air intake; the generation and meshing of the corresponding three-dimensional electromagnetic field model based on the biomass pyrolysis and reforming reactor includes: assuming the internal volume of the tubular reactor is V; the number of controllable microwave sources is n; the number of controllable steam inlets is m; assuming the power of the kth controllable microwave source is... The total power of the microwave generator is Let the air intake volume of the k-th controllable steam nozzle be... The total intake volume of water vapor is The meshed 3D electromagnetic field model has d meshes and is stored in a set Mesh, where the electromagnetic intensity of the j-th mesh belonging to the set Mesh is... The temperature is ; S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feeding rate. S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step; the tubular reactor includes multiple logically divided temperature control zones; each temperature control zone corresponds to its own gas-solid component threshold and target temperature range; the target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis; the target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming. S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone includes an out-of-standard grid that exceeds the gas-solid component threshold after a time step. If so, calculate the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-standard grid is located, and return to step S13 as the updated air intake. S15. Based on the predicted temperature field distribution value, determine whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If yes, calculate the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and return to step S13 as the updated microwave power and / or air intake. If no, use the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

2. The biomass pyrolysis reforming reactor control method according to claim 1, characterized in that, Also includes: S16. Update the feed rate of the tubular reactor by increasing the rotation speed of the feed screw shaft according to a preset ratio and return to step S13; S17. If, at the current feed rate, the number of calculation cycles still exceeds the allowable grid, the feed rate is rolled back to the value before the last update.

3. The method for controlling a biomass pyrolysis reforming reactor according to claim 1 or 2, characterized in that, include: The pyrolysis section is used to pyrolyze materials using a corresponding controllable microwave source; The reforming section is used to reform the material with water vapor using a corresponding controllable microwave source.

4. The biomass pyrolysis reforming reactor control method according to claim 3, characterized in that, The multiple logically defined temperature control zones include: Multiple temperature control zones are divided at equal intervals according to the length of the tubular reactor, or multiple temperature control zones are divided with equal temperature differences according to the heating curve from front to back inside the tubular reactor.

5. The biomass pyrolysis reforming reactor control method according to claim 4, characterized in that, The calculation of the minimum air intake of the controllable steam nozzle corresponding to the temperature control zone where the out-of-standard grid is located includes: For each of the aforementioned temperature control zones: Traverse all grids in the temperature control zone. If a grid exceeding the target gas-solid component threshold is found during the traversal, extract the gas-solid component data of the grid exceeding the target gas-solid component threshold and store it in the data set sum. After the traversal is complete, the data in the dataset `sum` are summed. Finally, the summation result is substituted into the reforming reaction model to obtain the amount of water vapor required to consume the gas-solid components to the target gas-solid component threshold. This amount is the minimum inlet flow rate of the controllable water vapor nozzle corresponding to the grid that exceeds the target gas-solid component threshold. .

6. The method for controlling a biomass pyrolysis reforming reactor according to claim 1 or 2, characterized in that, The calculation of the microwave power of the controllable microwave source adapted to the out-of-standard grid and / or the air intake of the controllable water vapor nozzle includes: For each of the aforementioned temperature control zones: S21. Based on the three-dimensional electromagnetic field model, obtain the current microwave power of each controllable microwave source and the current air intake of each controllable water vapor nozzle at the first time step when the material enters the temperature control zone. S22. Traverse the maximum temperature point of the grid in the temperature control zone. If the maximum temperature point exceeds the upper limit of the target temperature range, store the grid identifier and temperature data corresponding to the maximum temperature point into the database DB1. S23. Traverse the minimum temperature point of the grid in the temperature control zone. If the minimum temperature point exceeds the lower limit of the target temperature range, store the grid identifier and temperature data corresponding to the minimum temperature point into the database DB2. S24. According to the heat conduction equation, through the enthalpy of reaction... Establish an implicit function F that satisfies ; in, j The grid number. i Here is the sequence number of the temperature control zone; x, y, and z represent the three axes; the electric field intensity component along the x-axis is... The electric field intensity component along the y-axis is The electric field intensity component along the z-axis is ; The required air intake range for the temperature control zone; S25. For the grid currently stored in the database DB1, based on Maxwell's equations and the implicit function F, simultaneously solve for the range of controllable electric field intensity components within the grid where the maximum temperature of the biomass in the temperature-controlled zone during the remaining residence time does not exceed the upper limit of the target temperature range. , , ; For the grid currently stored in the database DB2, based on Maxwell's equations and the implicit function F, simultaneously solve for the range of controllable electric field intensity components that ensure the minimum temperature of the biomass within the grid in the temperature-controlled zone during the remaining residence time is not lower than the lower limit of the target temperature range. , , ; S26, When the required steam intake volume range The minimum value is not greater than the minimum water vapor intake. Furthermore, the range of water vapor intake The maximum value is not less than the minimum water vapor intake. ,Will value assigned to The minimum value, and then the updated water vapor intake range. The range of water vapor intake at the current step size And return to step S24; When the required water vapor intake range The minimum value is greater than the minimum water vapor intake. ,Will value assigned to Then, the updated water vapor intake range will be... The range of water vapor intake at the current step size And return to step S24; S27. After obtaining the controllable electric field intensity component range of all grids in the databases DB1 and DB2, decompose the forward waves transmitted by all controllable microwave sources belonging to the temperature control zone through the array waveguide. The components of the forward wave of the k-th controllable microwave source in the three directions are as follows: , , ; S28. Traverse all possibilities of the components of the controllable microwave source belonging to the temperature control zone at the next time step, and couple them with the components of other temperature control zones to obtain the set of optimal electric field intensity components that satisfy the judgment rules for all grids in DB1 and DB2. The total power of the current temperature control zone corresponding to this set is Call the implicit function F to solve for the optimal set of electric field intensity components. The corresponding range of total water vapor intake in the current temperature control zone .

7. A control device for a biomass pyrolysis reforming reactor, characterized in that, include: The model building unit is used to generate a corresponding three-dimensional electromagnetic field model and mesh it based on the biomass pyrolysis and reforming reactor. The biomass pyrolysis and reforming reactor includes a feed screw shaft, a tubular reactor, and a microwave generator equipped with multiple controllable microwave sources. The tubular reactor includes a pyrolysis section at the front and a reforming section at the rear. The feed screw shaft has a hollow design and is equipped with multiple controllable steam nozzles with controllable air intake. The parameter determination unit is used to determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source, the air intake of each controllable steam nozzle, and the physical property parameters of biomass and steam and the material feed rate. The simulation unit is used to obtain the steady-state simulation results of the three-dimensional electromagnetic field model based on the input parameters, with a preset time step as the calculation period. The simulation results include the predicted temperature field distribution and gas-solid component distribution of each temperature control zone in the tubular reactor after one time step. The tubular reactor includes multiple logically divided temperature control zones. Each temperature control zone corresponds to its own gas-solid component threshold and target temperature range. The target temperature range of each temperature control zone in the pyrolysis section is the temperature range suitable for pyrolysis. The target temperature range of each temperature control zone in the reforming section is the temperature range suitable for reforming. The minimum air intake calculation unit is used to determine whether each temperature control zone includes an out-of-limit grid that exceeds the gas-solid component threshold after a time step based on the predicted gas-solid component distribution value. If so, it calculates the minimum air intake of the controllable water vapor nozzle corresponding to the temperature control zone where the out-of-limit grid is located and returns it to the simulation calculation unit as the updated air intake. The control command generation unit is used to determine, based on the predicted temperature field distribution value, whether each temperature control zone includes an out-of-range grid exceeding the target temperature range after one time step. If so, it calculates the microwave power of the controllable microwave source and / or the air intake of the controllable steam nozzle adapted to the out-of-range grid, and returns it as the updated microwave power and / or air intake to the simulation calculation unit. If not, it uses the current air intake as the target air intake and the current microwave power as the target microwave power to generate control commands for the control valves and microwave power of the controllable steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

8. The biomass pyrolysis reforming reactor control device according to claim 7, characterized in that, Also includes: The rollback adjustment unit is used to update the feed rate of the tubular reactor by increasing the rotational speed of the feed screw shaft according to a preset ratio and return it to the simulation calculation unit; If, at the current feed rate, the number of calculation cycles still exceeds the allowable limit for certain grids, the feed rate will be rolled back to the value before the last update.

9. A control device for a biomass pyrolysis reforming reactor, characterized in that, include: Memory, used to store computer programs; A processor is configured to invoke and execute the computer program to implement the steps of the biomass pyrolysis reforming reactor control method as described in any one of claims 1-6.

10. A storage medium, characterized in that, Includes software programs adapted for execution by a processor of the steps of the biomass pyrolysis reforming reactor control method as described in any one of claims 1-6.

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