CN-118421345-B - Control method, device, equipment and storage medium for biomass pyrolysis reforming reactor

CN118421345BCN 118421345 BCN118421345 BCN 118421345BCN-118421345-B

Abstract

The invention discloses a control method, a device, equipment and a storage medium of a biomass pyrolysis reforming reactor, wherein the method comprises the steps of generating a three-dimensional electromagnetic field model and meshing, determining input parameters of the three-dimensional electromagnetic field model, obtaining a simulation result of the three-dimensional electromagnetic field model under a steady state according to the input parameters, judging whether each temperature control area comprises an exceeding grid exceeding a gas-solid component threshold value after a time step, if so, calculating and updating the minimum air inflow of a controllable steam spray hole, judging whether each temperature control area comprises an exceeding grid exceeding a target temperature interval after the time step, if so, calculating and updating microwave power and/or air inflow, and if not, generating control instructions for controlling a valve and the microwave power, and adjusting various corresponding strategies in advance according to different working conditions in a working condition pre-judging mode, so that the response speed of the biomass pyrolysis reforming reactor can be effectively improved, and the control effect is further improved.

Inventors

Wu Sikan
XIAO BIN
ZHANG BIAO
WANG XIN
SONG YONGYI

Assignees

中国石油化工股份有限公司
中石化（大连）石油化工研究院有限公司

Dates

Publication Date: 20260505
Application Date: 20230202

Claims (10)

1. A method for controlling a biomass pyrolysis reforming reactor, comprising the steps of: S11, generating a corresponding three-dimensional electromagnetic field model according to the biomass pyrolysis reforming reactor and performing gridding, wherein the biomass pyrolysis reforming reactor comprises a feeding screw shaft, a tubular reactor and a microwave generator provided with a plurality of controllable microwave sources, the tubular reactor comprises a pyrolysis section positioned at the front part and a reforming section positioned at the rear part, a shaft body of the feeding screw shaft is of a hollow design and is provided with a plurality of controllable steam spray holes with controllable air inflow, the corresponding three-dimensional electromagnetic field model is generated according to the biomass pyrolysis reforming reactor and performing gridding, the method comprises the steps of setting the volume in a cavity of the tubular reactor to be V, setting the number of the controllable microwave sources to be n, setting the number of the controllable steam feed inlets to be m and setting the power of a kth controllable microwave source to be m The total power of the microwave generator is Setting the air inflow of the kth controllable steam jet orifice as The total air intake amount of the water vapor is The three-dimensional electromagnetic field model after gridding is provided with d grids and is stored in a set Mesh, wherein the electromagnetic intensity of the j-th grid belonging to the set Mesh is as follows At a temperature of ; S12, determining input parameters of the three-dimensional electromagnetic field model, wherein the input parameters comprise microwave power of each controllable microwave source, air inflow of each controllable steam spray hole, physical property parameters of biomass and steam and material feeding rate; S13, taking a preset time step as a calculation period, and obtaining a simulation result of the three-dimensional electromagnetic field model under a steady state according to the input parameter, wherein the simulation result comprises a temperature field distribution predicted value and a gas-solid component distribution predicted value of each temperature control region in the tubular reactor after one time step, the tubular reactor comprises a plurality of logically divided temperature control regions, each temperature control region corresponds to a respective gas-solid component threshold value and a target temperature region, the target temperature region of each temperature control region in the pyrolysis section is a temperature range suitable for pyrolysis, and the target temperature region of each temperature control region in the reforming section is a temperature range suitable for reforming; S14, judging whether each temperature control area comprises an exceeding grid exceeding the threshold value of the gas-solid component according to the predicted value of the gas-solid component distribution after a time step, if so, calculating the minimum air inflow of the controllable steam spray holes corresponding to the temperature control area where the exceeding grid is located, and returning the minimum air inflow to the step S13 as the updated air inflow; And S15, judging whether each temperature control area comprises an exceeding grid exceeding the target temperature interval according to the temperature field distribution predicted value after a time step, if so, calculating the microwave power of a controllable microwave source and/or the air inflow of a controllable steam spray hole which are matched with the exceeding grid, and returning the microwave power and/or the air inflow to the step S13 as updated microwave power and/or air inflow, and if not, taking the current air inflow as the target air inflow and the current microwave power as the target microwave power, and generating a control instruction of a control valve of the controllable steam spray hole of the temperature control area which belongs to the exceeding grid area and a control instruction of the microwave power.
2. The biomass pyrolysis reforming reactor control method as claimed in claim 1, further comprising: S16, updating the feeding rate of the tubular reactor by adjusting the rotating speed of the feeding screw shaft upwards according to a preset proportion and returning to the step S13; And S17, if the standard exceeding grid is still included after the preset number of calculation cycles under the current feeding rate, rolling back the feeding rate to the value before the last update.
3. The biomass pyrolysis reforming reactor control method as claimed in claim 1 or 2, comprising: The pyrolysis section is used for pyrolyzing the materials through corresponding controllable microwave sources; the reforming section is used for carrying out steam reforming on the materials through corresponding controllable microwave sources.
4. The biomass pyrolysis reforming reactor control method as recited in claim 3 wherein the plurality of logically divided temperature controlled zones comprises: A plurality of temperature control areas are equidistantly divided according to the length of the tubular reactor, or a plurality of temperature control areas are divided according to the temperature rising curve from front to back in the tubular reactor and the isothermal difference.
5. The method for controlling a biomass pyrolysis reforming reactor according to claim 4, wherein calculating the minimum air inflow of the controllable steam jet holes corresponding to the temperature control area where the standard exceeding grid is located comprises: For each of the temperature control zones: Traversing all grids in the temperature control area, and extracting and storing gas-solid component data of grids exceeding the target gas-solid component threshold value into a data set sum if grids exceeding the target gas-solid component threshold value are found in the traversing process; Adding the data in the data set sum after traversing, and finally, bringing the added result into a reforming reaction model to obtain the water vapor amount required for consuming the gas-solid components to the target gas-solid component threshold value, namely the minimum air inflow value of the controllable water vapor spray holes corresponding to the grid exceeding the target gas-solid component threshold value 。
6. The method for controlling a biomass pyrolysis reforming reactor according to claim 1 or 2, wherein the calculating the microwave power of the controllable microwave source and/or the air inflow of the controllable steam jet orifice adapted by the standard exceeding grid comprises: For each of the temperature control zones: s21, acquiring current microwave power of each controllable microwave source and current air inflow of each controllable steam spray hole when a material enters the first time step of the temperature control zone according to the three-dimensional electromagnetic field model; S22, traversing the maximum temperature point of the grid in the temperature control area, and storing the grid mark and the temperature data corresponding to the maximum temperature point into a database DB1 if the maximum temperature point exceeds the upper limit of the target temperature interval; s23, traversing the minimum temperature point of the grid in the temperature control area, and storing the grid mark and the temperature data corresponding to the minimum temperature point into a database DB2 if the minimum temperature point exceeds the lower limit of the target temperature interval; s24, according to a heat conduction equation, passing through the reaction enthalpy Establishing a hidden function F and meeting ; Wherein j is the serial number of the grid, i is the serial number of the temperature control area, x, y and z are three axial directions respectively, and the electric field intensity component of the x axial direction is The y-axis electric field intensity component is The electric field intensity component in the z-axis direction is ; A range of intake air amount required in the temperature control region; s25, for the grids currently stored in the database DB1, solving the controllable electric field intensity component range of the maximum temperature of the biological material in the grids in the residual residence time of the temperature control zone not exceeding the upper limit of the target temperature zone simultaneously according to the Maxwell equation and the hidden function F , , ; For the grid currently stored in the database DB2, solving the controllable electric field intensity component range of the minimum temperature of the biological material in the grid in the temperature control zone in the residual residence time not lower than the lower limit of the target temperature zone according to the Maxwell equation and the hidden function F , , ; S26, when the required water vapor air inflow range Is not greater than the minimum water vapor intake air amount And, the water vapor intake air amount range Is not less than the minimum water vapor intake air amount Will be Is assigned to the value of (2) Then the updated water vapor air inflow range As the range of the water vapor intake amount at the current step And returns to step S24; When the required water vapor intake amount is in the range Is greater than the minimum water vapor intake air amount Will be Is assigned to the value of (2) Then the updated water vapor air inflow range As the range of the water vapor intake amount at the current step And returns to step S24; S27, after the controllable electric field intensity component ranges of all grids in the databases DB1 and DB2 are obtained, decomposing forward waves transmitted by all controllable microwave sources belonging to the temperature control area through the array waveguide, wherein the components of the forward wave of the kth controllable microwave source in 3 directions are respectively , , ; S28, traversing all the possibilities of the components of the controllable microwave source in the temperature control area on the next time step, and coupling with the components of other temperature control areas to obtain an optimal electric field strength component set which enables all grids in DB1 and DB2 to meet the judgment rule The total power of the temperature control area corresponding to the set is that Calling hidden function F to solve optimum electric field strength component set Corresponding total steam air inflow range of the temperature control area 。
7. A biomass pyrolysis reforming reactor control device, comprising: The system comprises a model construction unit, a biomass pyrolysis reforming reactor, a model generation unit and a control unit, wherein the model construction unit is used for generating a corresponding three-dimensional electromagnetic field model according to the biomass pyrolysis reforming reactor and performing gridding, the biomass pyrolysis reforming reactor comprises a feeding screw shaft, a tubular reactor and a microwave generator provided with a plurality of controllable microwave sources, the tubular reactor comprises a pyrolysis section positioned at the front part and a reforming section positioned at the rear part, and the shaft body of the feeding screw shaft is hollow and is provided with a plurality of controllable steam spray holes with controllable air inflow; the parameter determining unit is used for determining input parameters of the three-dimensional electromagnetic field model, and comprises microwave power of each controllable microwave source, air inflow of each controllable steam spray hole, physical property parameters of biomass and steam and material feeding rate; The simulation calculation unit is used for obtaining a simulation result of the three-dimensional electromagnetic field model in a steady state according to the input parameters by taking a preset time step as a calculation period, wherein the simulation result comprises a temperature field distribution predicted value and a gas-solid component distribution predicted value of each temperature control region in the tubular reactor after one time step, the tubular reactor comprises a plurality of logically divided temperature control regions, each temperature control region corresponds to a respective gas-solid component threshold value and a target temperature region, the target temperature region of each temperature control region in the pyrolysis section is a temperature range suitable for pyrolysis, and the target temperature region of each temperature control region in the reforming section is a temperature range suitable for reforming; the minimum air inflow calculation unit is used for judging whether each temperature control area comprises an exceeding grid exceeding the threshold value of the gas-solid component after a time step according to the gas-solid component distribution predicted value, if so, calculating the minimum air inflow of the controllable steam spray holes corresponding to the temperature control area where the exceeding grid is located, and returning the minimum air inflow as updated air inflow to the simulation calculation unit; And the control instruction generating unit is used for judging whether each temperature control area comprises an exceeding grid exceeding the target temperature interval according to the temperature field distribution predicted value after one time step, if so, calculating the microwave power of the controllable microwave source and/or the air inflow of the controllable steam spray hole which are matched by the exceeding grid, and returning the microwave power and/or the air inflow as updated microwave power and/or air inflow to the analog calculating unit, and if not, taking the current air inflow as the target air inflow and the current microwave inflow as the target microwave power, and generating a control instruction of a control valve of the controllable steam spray hole of the temperature control area which belongs to the exceeding grid area and a control instruction of the microwave power.
8. The biomass pyrolysis reforming reactor control apparatus as recited in claim 7 further comprising: And the rollback adjusting unit is used for updating the feeding rate of the tubular reactor by adjusting the rotating speed of the feeding screw shaft according to a preset proportion and returning the feeding rate to the analog calculating unit, and if the feeding rate still comprises an exceeding grid after a preset number of calculating cycles under the current feeding rate, the feeding rate is rolled back to the value before the last updating.
9. A biomass pyrolysis reforming reactor control apparatus, comprising: A memory for storing a computer program; A processor for invoking and executing said computer program to perform the steps of the biomass pyrolysis reforming reactor control method as claimed in any one of claims 1-6.
10. A storage medium comprising a software program adapted to be executed by a processor for performing the steps of the biomass pyrolysis reforming reactor control method according to any one of claims 1-6.

Description

Control method, device, equipment and storage medium for biomass pyrolysis reforming reactor Technical Field The invention relates to the field of chemical technology, in particular to a control method, a device, equipment and a storage medium of a biomass pyrolysis reforming reactor. Background Biomass pyrolysis, which generally refers to the process of producing coke, condensable fluid and gaseous products by heating biomass to raise the temperature to cause molecular decomposition in an anaerobic or hypoxic environment, is an important utilization form of biomass energy. Steam reforming generally refers to the process of producing synthesis gas from hydrocarbon materials or fixed carbon under the action of steam. Since pyrolysis of biomass produces a portion of tar and hydrocarbon gas products, a secondary reaction of such materials by means of a reforming reaction of steam at high temperature is required to redirect the production of the desired gas products. In the prior art, a multi-reactor arrangement is generally adopted, that is, different reactors are connected to perform biomass pyrolysis and steam reforming respectively. The inventor finds that the following defects exist in the prior art adopting a multi-reactor setting mode: in the design mode of multiple reactors, materials need to be conveyed, so that extra energy loss is easy to cause, the complexity of the process is increased, and the industrial application is not facilitated. The above information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. Disclosure of Invention The invention aims to save energy consumption in the process of biomass pyrolysis and reforming and simplify the complexity of the process. The invention provides a control method of a biomass pyrolysis reforming reactor, which comprises the following steps: S11, generating a corresponding three-dimensional electromagnetic field model according to the biomass pyrolysis reforming reactor and meshing, wherein the biomass pyrolysis reforming reactor comprises a feeding screw shaft, a tubular reactor and a microwave generator provided with a plurality of controllable microwave sources, and the tubular reactor comprises a pyrolysis section positioned at the front part and a reforming section positioned at the rear part; S12, determining input parameters of the three-dimensional electromagnetic field model, wherein the input parameters comprise microwave power of each controllable microwave source, air inflow of each controllable steam spray hole, physical property parameters of biomass and steam and material feeding rate; S13, taking a preset time step as a calculation period, and obtaining a simulation result of the three-dimensional electromagnetic field model under a steady state according to the input parameter, wherein the simulation result comprises a temperature field distribution predicted value and a gas-solid component distribution predicted value of each temperature control region in the tubular reactor after one time step, the tubular reactor comprises a plurality of logically divided temperature control regions, each temperature control region corresponds to a respective gas-solid component threshold value and a target temperature region, the target temperature region of each temperature control region in the pyrolysis section is a temperature range suitable for pyrolysis, and the target temperature region of each temperature control region in the reforming section is a temperature range suitable for reforming; S14, judging whether each temperature control area comprises an exceeding grid exceeding the threshold value of the gas-solid component according to the predicted value of the gas-solid component distribution after a time step, if so, calculating the minimum air inflow of the controllable steam spray holes corresponding to the temperature control area where the exceeding grid is located, and returning the minimum air inflow to the step S13 as the updated air inflow; And S15, judging whether each temperature control area comprises an exceeding grid exceeding the target temperature interval according to the temperature field distribution predicted value after a time step, if so, calculating the microwave power of a controllable microwave source and/or the air inflow of a controllable steam spray hole which are matched with the exceeding grid, and returning the microwave power and/or the air inflow to the step S13 as updated microwave power and/or air inflow, and if not, taking the current air inflow as the target air inflow and the current microwave inflow as the target microwave power, and generating a control instruction of a control valve of the controllable steam spray hole of the temperature control area which belongs