Biomass microwave pyrolysis reforming device and control method thereof

Abstract

This invention discloses a biomass microwave pyrolysis reforming apparatus and its control method. The biomass microwave pyrolysis reforming apparatus includes a pyrolysis reforming unit, a discharge tower, and a control unit. The pyrolysis reforming unit includes a feed screw shaft, a microwave heating cavity, 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 multiple steam nozzles at corresponding positions in the reforming section. Steam branch pipes are connected to each steam nozzle from within the shaft cavity. Each steam branch pipe, equipped with a control valve, merges into the main steam pipe and is connected to the steam generator via a dynamic sealing mechanism. The control unit executes control actions on the controllable microwave sources, the feed screw shaft, and the control valves according to control commands. This invention effectively saves energy and simplifies the process complexity.

Description

Technical Field

[0001] This invention relates to the field of chemical processes, and in particular to a biomass microwave pyrolysis reforming apparatus and its control method. 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 biomass microwave pyrolysis reforming apparatus, comprising: pyrolysis reforming equipment, unloading tower, and control equipment;

[0010] The pyrolysis reforming equipment includes a feed screw shaft, a microwave heating cavity, and a microwave generator equipped with multiple controllable microwave sources; the material is conveyed by the feed screw shaft through a tubular reactor in the microwave heating cavity, heated by the microwave generator, and then falls into the unloading tower; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear.

[0011] The feed screw shaft has a hollow 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 inside the shaft cavity; each steam branch pipe, which is equipped with a control valve, merges into the main steam pipe and is then connected to the steam generator through a dynamic sealing mechanism.

[0012] The control device executes control actions of the controllable microwave source, the feed screw shaft, and the control valve according to control commands.

[0013] Preferably, in this invention, it further includes:

[0014] The feed screw shaft has multiple steam jet holes at the corresponding position in the pyrolysis section.

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

[0016] The feed screw shaft, positioned transversely within the tubular reactor, includes helical blades for propelling the material.

[0017] The blade spacing of the spiral blades is set to gradually decrease from the driving end to the end.

[0018] Preferably, in this invention, it includes:

[0019] One end of the feed screw shaft is connected to the drive motor, and the other end is connected to the steam branch pipe.

[0020] Preferably, in this invention, it includes:

[0021] The feed screw shaft and the drive motor are detachably connected.

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

[0023] The feed screw shaft is positioned horizontally at the central axis of the tubular reactor.

[0024] Preferably, in this invention, it includes:

[0025] The feed screw shaft can be made of graphite composite material or metal material.

[0026] Preferably, the present invention further includes a processing device;

[0027] The processing device is used to generate control commands for the control valve according to preset rules; the preset rules include:

[0028] For the steam nozzles at the corresponding locations in the reforming section, set their injection cycle and injection volume per injection.

[0029] Preferably, in this invention, the processing device is further used for:

[0030] For the steam nozzles at the corresponding locations in the pyrolysis section, when a hot spot effect is predicted to occur in a certain area of ​​the pyrolysis section based on the three-dimensional electromagnetic field model, a control command is generated to open the control valve corresponding to the hot spot effect area.

[0031] Preferably, in this invention, the processing device is further used for:

[0032] For the steam nozzles at the corresponding locations in the reforming section, predictive values ​​of the temperature field distribution and / or gas-solid composition data of the reforming section are generated based on the three-dimensional electromagnetic field model, and control commands for the adjustment amounts of each control valve are generated.

[0033] In another aspect of the present invention, a control method for a vertical moving bed biomass pyrolysis reactor is also provided, for controlling the biomass pyrolysis reactor as described above, comprising:

[0034] S11. Generate a corresponding three-dimensional electromagnetic field model based on the pyrolysis reforming equipment and mesh it;

[0035] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source in the pyrolysis reforming equipment, the air intake of each steam nozzle, and the physical property parameters of the material and steam and the material feed rate.

[0036] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model according to the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution 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 target temperature range;

[0037] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone in the reforming section 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 water vapor nozzle corresponding to the out-of-standard grid according to the preset algorithm, and return to step S13 as the updated air intake.

[0038] S15. Based on the predicted temperature field distribution value, determine whether the renormalization segment after one time step includes out-of-range grids that exceed the target temperature range. If yes, adjust the air intake volume of the steam nozzles corresponding to the out-of-range grids and / or the microwave power of the controllable microwave source according to preset rules, and return to step S13 as the updated air intake volume and / or microwave power. If no, take the current air intake volume as the target air intake volume and the current microwave power as the target microwave power, and generate control commands for the control valves of the steam nozzles in the temperature control zone to which the out-of-range grid area belongs, and control commands for the microwave power.

[0039] In another aspect of the invention, a control device for a vertical moving bed biomass pyrolysis reactor is also provided, comprising:

[0040] Memory, used to store computer programs;

[0041] A processor is used to invoke and execute the computer program to implement the various steps of the control method for the vertical moving bed biomass pyrolysis reactor as described in any of the preceding claims.

[0042] 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 control method for the vertical moving bed biomass pyrolysis reactor as described in any of the preceding claims.

[0043] The tar removal control device of the vertical moving bed 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.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] In this invention, by using a feed screw shaft to transport materials, the rotation of the screw blades can both push and continuously agitate the materials, thus ensuring that the materials entering the tubular reaction chamber are heated evenly. In addition, the rotating screw blades can also scrape away the carbonized residues on the tubular reactor wall after the materials have reacted at high temperatures, preventing material blockage.

[0046] Next, the tubular reactor in this invention 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 invention 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 meeting the steam requirements for steam reforming. Since the pyrolysis and reforming processes in this invention are implemented within a single tubular reactor, compared to the multi-reactor setups in existing technologies, this invention effectively saves energy and simplifies equipment and process complexity.

[0047] Furthermore, in this invention, water vapor can be transported in the pyrolysis section through water vapor nozzles on the feed screw shaft. This allows for cooling by spraying water vapor to avoid hot spot effects during pyrolysis, thereby improving the process stability of biomass pyrolysis.

[0048] Furthermore, in this invention, a three-dimensional electromagnetic field model can be generated based on the tubular reactor modeling. Then, by predicting the temperature field distribution and gas-solid component distribution inside 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.

[0049] 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

[0050] 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.

[0051] Figure 1 This is a schematic diagram of the structure of the biomass microwave pyrolysis reforming device described in this invention;

[0052] Figure 2 This is a flowchart illustrating the control method of the biomass microwave pyrolysis reforming apparatus described in this invention.

[0053] Figure 3 This is a schematic diagram of the control equipment structure of the biomass microwave pyrolysis reforming device described in this invention. Detailed Implementation

[0054] 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.

[0055] 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.

[0056] 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.

[0057] Example 1

[0058] To save energy consumption in the biomass pyrolysis and reforming process and simplify the process complexity, such as... Figure 1 As shown, a biomass microwave pyrolysis reforming apparatus is provided in this embodiment of the invention, including: pyrolysis reforming equipment, unloading tower and control equipment;

[0059] The pyrolysis reforming equipment includes a feed screw shaft 11, a microwave heating cavity 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 14 inside the microwave heating cavity 12, heated by the microwave generator, and then falls into the unloading tower 02; the tubular reactor 14 includes a pyrolysis section at the front and a reforming section at the rear.

[0060] The feed screw shaft 11 has a hollow shaft design and multiple steam nozzles are provided at the corresponding positions of 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, merges into the main steam pipe 15 and is then connected to the steam generator 16 through a dynamic sealing mechanism.

[0061] The control equipment executes the controllable microwave source 13, the feed screw shaft 11, and the control valve according to the control instructions.

[0062] In practical applications, a material feed hopper 17 is also required to convey materials to the feed screw shaft 11. The material feed hopper 17 can be made of stainless steel, has a certain volume, and is connected to the space inside the tubular reactor 14. The two are sealed to prevent air leakage.

[0063] The material feed hopper 17 is the feed inlet of the entire tubular reactor 14. In order to facilitate the entry of materials into the tubular reactor 14, the material feed hopper 17 can adopt an inverted cone design. The material layer height formed by the space inside the hopper is supplemented by the slight negative pressure formed by the feed screw shaft 11 and the Roots blower to carry out the material transfer, ensuring the continuity and stability of the feeding rate.

[0064] The microwave generator in this embodiment of the invention mainly includes a magnetron capable of generating fixed-frequency microwave signals using frequency synthesis technology, and a power supply device for powering the magnetron. The power supply device converts common AC power into DC power, while the magnetron converts the DC power from the power supply device into microwave energy for transmission. A microwave waveguide transmits the microwaves generated by the microwave generator from the outside of the microwave cavity to the medium inside the cavity. To prevent microwave leakage and radiation, the microwave waveguide medium used in this embodiment of the invention can be a hollow, enclosed waveguide made of metal.

[0065] In this embodiment of the invention, the microwave heating cavity 12 has an outer wall made of metal material and is sealed to the microwave waveguide, while the cavity space is connected to the internal space of the microwave waveguide.

[0066] A tubular reactor 14 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 17 and the microwave heating cavity 14 to prevent leakage of materials and their reaction products. Meanwhile, the internal space of the tubular reactor 14 is connected to the space of the material feed hopper 17, but not to the space inside the microwave heating cavity 14.

[0067] In this embodiment of the invention, the feed screw shaft 11 is a fixed shaft with helical blades that is horizontally placed inside the tubular reactor 14. Preferably, the helical blades are at a certain angle to the wall of the tubular reactor, and the closer to the end of the screw shaft, the smaller the spacing (i.e., the pitch) of the helical blades. This can gradually increase the thrust on the material at the end to prevent material squeezing.

[0068] Preferably, in this embodiment of the invention, the feed screw shaft 11 can be positioned close to the bottom of the tubular reactor 14, so as to scrape the carbonized residue on the wall of the tubular reactor after the material reaction at high temperature and prevent material blockage.

[0069] In this embodiment of the invention, the feed screw shaft 11 has a hollow shaft design, and multiple steam jet holes are provided on the shaft at positions corresponding to the reforming section. 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 main steam pipe 15. Each steam branch pipe is also equipped with an electrically controlled valve to control the injection timing and injection volume of each steam nozzle. The main steam pipe is connected to the steam generator through a dynamic sealing mechanism. In this way, during the rotation of the feed screw shaft 11, the steam branch pipes and the main steam pipe 15 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 main steam pipe 15 during the rotation of the feed screw shaft 11.

[0070] In practical applications, the feed screw shaft 11 in this embodiment of the invention can be configured as a detachable connection. Then, depending on the specific process conditions, different materials can be selected for the feed screw shaft. Specifically, when the overall process uses raw materials with poor microwave absorption, the feed screw shaft can be made of graphite composite material, which indirectly acts as a microwave absorber in the reaction process, thereby enhancing the overall microwave heating efficiency. When the overall process requires high temperature uniformity, the feed screw shaft can be made of metal material, such as 304 steel, which can then disturb the electromagnetic field distribution through microwave reflection caused by the rotation of the blades, thereby weakening the hot spot effect in the microwave heating cavity and improving the thermal field uniformity of the overall process.

[0071] Since the tubular reactor is entirely connected to the microwave heating chamber, the disassembly point for the feed screw shaft 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 transport within the microwave heating chamber.

[0072] 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.

[0073] 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 required for reforming is replenished through steam nozzles.

[0074] Furthermore, in this embodiment of the invention, the feed screw shaft can also be provided with multiple steam spray holes at the corresponding position of the pyrolysis section. This allows for timely cooling by spraying steam to prevent the formation of hot spots during the pyrolysis process, thereby improving the stability of the pyrolysis process.

[0075] It should be noted that, in the embodiments of the present invention, the specific number of water vapor nozzles provided in the pyrolysis section or the reforming section can be determined by those skilled in the art based on the actual situation or a limited number of experiments, and no specific limitation is made here.

[0076] Preferably, the various control instructions for the control device can be generated by a processing device; the processing device in this embodiment of the invention can be a computing device with arithmetic processing functions, such as a PLC or a computer device, which generates various control instructions through a pre-stored computer program, specifically:

[0077] The processing device is used to generate control commands for the control valve according to preset rules; the preset rules include: setting the injection cycle and injection volume for the steam nozzle at the position corresponding to the reforming section.

[0078] It should be noted that, in the embodiments of the present invention, the specific settings of the spray cycle and the spray volume per spray can be obtained by those skilled in the art based on their working experience or a limited number of experiments, and are not specifically limited here.

[0079] Furthermore, the processing device can also be used to generate a control command for opening the control valve corresponding to the hot spot effect area when the hot spot effect area is predicted to occur in a certain region of the pyrolysis section according to the three-dimensional electromagnetic field model for the water vapor nozzle at the corresponding position of the pyrolysis section.

[0080] Furthermore, the processing device can also be used to: generate predicted values ​​of temperature field distribution and / or gas-solid composition data of the reforming section based on a three-dimensional electromagnetic field model for the water vapor nozzles at the corresponding positions in the reforming section, and generate control commands for the adjustment amount of each control valve.

[0081] By utilizing three-dimensional electromagnetic field simulation technology, the electromagnetic field strength and temperature distribution data inside the tubular reactor can be simulated and predicted. Based on the prediction results, the processing unit can generate corresponding control commands to determine the injection timing and injection volume of each steam nozzle.

[0082] In summary, in this embodiment of the invention, by using a feed screw shaft to transport materials, the rotation of the screw blades can both push and continuously agitate the materials, thus ensuring that the materials entering the tubular reaction chamber are heated evenly. Furthermore, since the feed screw shaft is positioned horizontally at the central axis of the tubular reactor, the rotating screw blades can also scrape away the carbonized residues on the reactor wall after the materials have reacted at high temperatures, preventing material blockage.

[0083] Next, 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 the pyrolysis and reforming sections to be set separately by controlling the microwave power of a controllable microwave source. Furthermore, this embodiment of the invention also uses a hollow feed screw shaft to provide steam branch pipes, and then uses steam nozzles on the feed screw shaft to deliver steam to the reforming section, thereby supplementing the steam required for steam reforming. Since the pyrolysis and reforming processes in this embodiment of the invention are implemented in a single tubular reactor, compared to the multi-reactor setups in the prior art, this invention effectively saves energy and simplifies the complexity of the equipment and processes.

[0084] In addition, in this embodiment of the invention, water vapor can be transported in the pyrolysis section through water vapor nozzles on the feed screw shaft. This allows for cooling by spraying water vapor to avoid hot spot effects during pyrolysis, thereby improving the process stability of biomass pyrolysis.

[0085] Furthermore, in this embodiment of the invention, a three-dimensional electromagnetic field model can be generated based on the tubular reactor modeling. 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.

[0086] Example 2

[0087] Based on Embodiment 1, this embodiment of the invention further provides a control method for a vertical moving bed biomass pyrolysis reactor, which automatically generates controllable microwave sources, feed screw shafts, and control commands for valves. (Refer to...) Figure 2 The specific steps include:

[0088] S11. Generate a corresponding three-dimensional electromagnetic field model based on the pyrolysis reforming equipment and mesh it;

[0089] This invention utilizes three-dimensional electromagnetic field simulation technology to simulate the electromagnetic field strength and temperature distribution data within a tubular reactor.

[0090] In practical applications, based on the tubular reactor modeling, the reactor wall, material inlet, material outlet, pyrolysis section, and reforming section are set, a three-dimensional electromagnetic field model is generated and meshed. Specifically, this can be done in the following ways:

[0091] Let the internal volume of the tubular reactor be V. r The internal volume of the pyrolysis section is V. a The volume of the reorganized cavity is V. t The number of each controllable microwave source is n;

[0092] Let the power of the i-th controllable microwave source be P. i The total power of the microwave pyrolysis reactor is

[0093] The meshed three-dimensional electromagnetic field model has d meshes and is stored in set D, where the electromagnetic intensity of the i-th mesh cell belonging to set D is E. i The temperature is T i .

[0094] In practical applications, the mesh in the embodiments of the present invention can be one or more of tetrahedral mesh, hexahedral mesh, pyramidal mesh, wedge mesh and polyhedral mesh; the calibration method can be one or more of general physics, fluid dynamics, plasma and semiconductor.

[0095] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source in the pyrolysis reforming equipment, the air intake of each steam nozzle, and the physical property parameters of biomass material and steam, and the feed rate of biomass material.

[0096] Before simulating the gas-solid component distribution and temperature field distribution inside the cavity, it is necessary to obtain various input parameters of the three-dimensional electromagnetic field model. Specifically, these parameters may include the current microwave frequency of each controllable microwave source, the air intake of each steam nozzle, as well as the physical properties of biomass materials and steam and the material feed rate.

[0097] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model according to the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution 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 target temperature range;

[0098] In this embodiment of the invention, the simulation results of the three-dimensional electromagnetic field model calculated based on the input parameters are periodic, that is, a calculation is performed every time step. In practical applications, the value of the time step can be determined based on the actual computing power of the computer and the experience of those skilled in the art, and no specific limitation is made here.

[0099] In this embodiment of the invention, the purpose of calculating the simulation results of the three-dimensional electromagnetic field model based on the input parameters is to obtain the predicted values ​​of the temperature field distribution and gas-solid component distribution of the reactor cavity at the current time and the next time step. That is, the temperature field distribution and electromagnetic field strength of the reactor are estimated in units of grids to obtain the estimated values ​​of temperature and gas-solid components for each grid.

[0100] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone in the reforming section 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 water vapor nozzle corresponding to the out-of-standard grid according to the preset algorithm, and return to step S13 as the updated air intake.

[0101] S15. Based on the predicted temperature field distribution value, determine whether the renormalization segment after one time step includes out-of-range grids that exceed the target temperature range. If yes, adjust the air intake volume of the steam nozzles corresponding to the out-of-range grids and / or the microwave power of the controllable microwave source according to preset rules, and return to step S13 as the updated air intake volume and / or microwave power. If no, take the current air intake volume as the target air intake volume and the current microwave power as the target microwave power, and generate control commands for the control valves of the steam nozzles in the temperature control zone to which the out-of-range grid area belongs, and control commands for the microwave power.

[0102] Example 3

[0103] Corresponding to the method embodiment (i.e., Embodiment 2), this embodiment of the invention also provides a control device for a vertical moving bed biomass pyrolysis 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.

[0104] An example diagram of the hardware structure block diagram of the control equipment for the vertical moving bed biomass pyrolysis reactor provided in this application embodiment is shown below. Figure 3 As shown, it may include:

[0105] Processor 1, communication interface 2, memory 3, and communication bus 4;

[0106] The processor 1, communication interface 2, and memory 3 communicate with each other via communication bus 4.

[0107] Optionally, communication interface 2 can be an interface of a communication module, such as the interface of a GSM module;

[0108] 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.

[0109] Memory 3 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0110] Specifically, processor 1 is used to execute the computer program stored in memory 3 to perform the following steps:

[0111] S11. Generate a corresponding three-dimensional electromagnetic field model based on the pyrolysis reforming equipment and mesh it;

[0112] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source in the pyrolysis reforming equipment, the air intake of each steam nozzle, and the physical property parameters of biomass and steam and the material feed rate.

[0113] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model according to the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution 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 target temperature range;

[0114] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone in the reforming section 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 water vapor nozzle corresponding to the out-of-standard grid according to the preset algorithm, and return to step S13 as the updated air intake.

[0115] S15. Based on the predicted temperature field distribution value, determine whether the renormalization segment after one time step includes out-of-range grids that exceed the target temperature range. If yes, adjust the air intake volume of the steam nozzles corresponding to the out-of-range grids and / or the microwave power of the controllable microwave source according to preset rules, and return to step S13 as the updated air intake volume and / or microwave power. If no, take the current air intake volume as the target air intake volume and the current microwave power as the target microwave power, and generate control commands for the control valves of the steam nozzles in the temperature control zone to which the out-of-range grid area belongs, and control commands for the microwave power.

[0116] The above-described product can perform the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for performing the method. Technical details not described in detail in this embodiment can be found in the vertical moving bed biomass pyrolysis reactor provided in the embodiments of the present invention.

[0117] Example 5

[0118] 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:

[0119] S11. Generate a corresponding three-dimensional electromagnetic field model based on the pyrolysis reforming equipment and mesh it;

[0120] S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source in the pyrolysis reforming equipment, the air intake of each steam nozzle, and the physical property parameters of biomass and steam and the material feed rate.

[0121] S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model according to the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution 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 target temperature range;

[0122] S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone in the reforming section 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 water vapor nozzle corresponding to the out-of-standard grid according to the preset algorithm, and return to step S13 as the updated air intake.

[0123] S15. Based on the predicted temperature field distribution value, determine whether the renormalization segment after one time step includes out-of-range grids that exceed the target temperature range. If yes, adjust the air intake volume of the steam nozzles corresponding to the out-of-range grids and / or the microwave power of the controllable microwave source according to preset rules, and return to step S13 as the updated air intake volume and / or microwave power. If no, take the current air intake volume as the target air intake volume and the current microwave power as the target microwave power, and generate control commands for the control valves of the steam nozzles in the temperature control zone to which the out-of-range grid area belongs, and control commands for the microwave power.

[0124] Optionally, the refined and extended functions of the program can be found in the description above.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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 biomass microwave pyrolysis reforming device, characterized in that, include: Pyrolysis reforming equipment, unloading tower, processing unit and control equipment; The pyrolysis reforming equipment includes a feed screw shaft, a microwave heating cavity, and a microwave generator equipped with multiple controllable microwave sources; the material is conveyed by the feed screw shaft through a tubular reactor in the microwave heating cavity, heated by the microwave generator, and then falls into the unloading tower; the tubular reactor includes a pyrolysis section at the front and a reforming section at the rear; the shaft of the feed screw shaft is provided with multiple steam jet holes at the corresponding positions of the pyrolysis section; The feed screw shaft has a hollow 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 inside the shaft cavity; each steam branch pipe, which is equipped with a control valve, merges into the main steam pipe and is then connected to the steam generator through a dynamic sealing mechanism. The control device executes control actions of the controllable microwave source, the feeding screw shaft, and the control valve according to control commands; The processing device is used to generate control commands for the control valve according to preset rules; the preset rules include: setting the injection cycle and injection volume for the steam nozzle at the position corresponding to the reforming section; The processing device is further configured to: for water vapor nozzles at locations corresponding to the pyrolysis section, when a hot spot effect is predicted to occur in a certain area of ​​the pyrolysis section based on a three-dimensional electromagnetic field model, generate control commands for opening control valves corresponding to the hot spot effect area; the processing device is further configured to: for water vapor nozzles at locations corresponding to the reforming section, generate predicted values ​​of temperature field distribution and / or gas-solid composition data for the reforming section based on a three-dimensional electromagnetic field model, and generate control commands for adjusting the amount of each control valve.

2. The biomass microwave pyrolysis reforming apparatus according to claim 1, characterized in that, include: The feed screw shaft, positioned transversely within the tubular reactor, includes helical blades for propelling the material. The blade spacing of the spiral blades is set to gradually decrease from the driving end to the end.

3. The biomass microwave pyrolysis reforming apparatus according to claim 2, characterized in that, include: One end of the feed screw shaft is connected to the drive motor, and the other end is connected to the steam branch pipe.

4. The biomass microwave pyrolysis reforming apparatus according to claim 3, characterized in that, include: The feed screw shaft and the drive motor are detachably connected.

5. The biomass microwave pyrolysis reforming apparatus according to claim 4, characterized in that, include: The feed screw shaft is positioned horizontally at the central axis of the tubular reactor.

6. The biomass microwave pyrolysis reforming apparatus according to claim 5, characterized in that, include: The feed screw shaft can be made of graphite composite material or metal material.

7. A control method for a biomass microwave pyrolysis reforming apparatus, used to control the biomass microwave pyrolysis reforming apparatus as described in any one of claims 1 to 6, characterized in that, include: S11. Generate a corresponding three-dimensional electromagnetic field model based on the pyrolysis reforming equipment and mesh it; S12. Determine the input parameters of the three-dimensional electromagnetic field model, including: the microwave power of each controllable microwave source in the pyrolysis reforming equipment, the air intake of each steam nozzle, and the physical property parameters of the material and steam and the material feed rate. S13. Using a preset time step as the calculation period, obtain the steady-state simulation results of the three-dimensional electromagnetic field model according to the input parameters; the simulation results include the predicted temperature field distribution and gas-solid component distribution 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 target temperature range; S14. Based on the predicted value of gas-solid component distribution, determine whether each temperature control zone in the reforming section 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 water vapor nozzle corresponding to the out-of-standard grid according to the preset algorithm, and return to step S13 as the updated air intake. S15. Based on the predicted temperature field distribution value, determine whether the renormalization segment after one time step includes out-of-range grids that exceed the target temperature range. If yes, adjust the air intake volume of the steam nozzles corresponding to the out-of-range grids and / or the microwave power of the controllable microwave source according to preset rules, and return to step S13 as the updated air intake volume and / or microwave power. If no, take the current air intake volume as the target air intake volume and the current microwave power as the target microwave power, and generate control commands for the control valves and microwave power of the steam nozzles in the temperature control zone to which the out-of-range grid area belongs.

8. A control device for a biomass microwave pyrolysis reforming apparatus, characterized in that, include: Memory, used to store computer programs; A processor is used to call and execute the computer program to implement the control method steps of the biomass microwave pyrolysis reforming apparatus as described in claim 7.

9. A storage medium, characterized in that, Includes software programs adapted for execution by a processor of the control method steps of the biomass microwave pyrolysis reforming apparatus as described in claim 7.

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