Special oil autothermal reforming reaction control method and related equipment for SOFC

Abstract

The present invention belongs to the technical field of solid oxide fuel cell power generation, and discloses a special oil autothermal reforming reaction control method for SOFC and related equipment, including: determining the open-loop oxygen-carbon ratio variable that needs to be regulated according to the discharge current of SOFC; determining the closed-loop oxygen-carbon ratio variable that needs to be regulated according to the actual temperature of the autothermal reforming reaction; calculating the actual required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable; calculating the fuel flow, water flow and air flow respectively according to the discharge current of SOFC and the actual required oxygen-carbon ratio using a fuel flow calculation model, a water flow calculation model and an air flow calculation model; and controlling the autothermal reforming reaction according to the fuel flow, water flow and air flow. The purpose of the present invention is to solve the problem of complex control of the special oil autothermal reforming reaction in a special oil autothermal reforming coupled solid oxide fuel cell system.

Description

Technical Field

[0001] The invention belongs to the technical field of solid oxide fuel cell power generation, and in particular relates to a special oil autothermal reforming reaction control method for SOFC and related equipment. Background Art

[0002] Energy is known as the "energy of the future" and the "ultimate energy", but hydrogen, as a secondary energy source, cannot be obtained directly from nature and needs to be produced through other energy sources. In order to effectively utilize coal tar by-products (special oils) and solve environmental pollution problems, special oils can be reformed to produce hydrogen-rich products and combined with downstream applications to achieve energy reuse. Reforming methods include steam reforming, partial oxidation reforming, and autothermal reforming. Among them, autothermal reforming couples the exothermic partial oxidation reforming and the highly endothermic steam reforming reaction in the reactor. The heat generated by the partial oxidation reforming reaction can meet the heat demand of the steam reforming reaction, and can achieve thermal self-sustaining of the entire system. It is the focus of current research. Solid Oxide Fuel Cell (SOFC) is a power generation device that directly converts chemical energy stored in fuel and oxidant into electrical energy. It has attracted widespread attention due to its clean and efficient characteristics. It has outstanding advantages in pollutant emissions, fuel economy, vibration and noise indicators, especially for fuel tolerance. It can use a variety of hydrocarbon fuels or synthetic gas as fuel gas. It can be used for distributed power supply in remote areas (mountain cabins, etc.), as well as as a backup power supply for various key systems (communication, security, monitoring, etc.), suitable for different transportation applications, such as vehicle propulsion, trucks, trains, airplanes, RVs, ships and yachts. Special oil coupled with solid oxide fuel cell as a power device through autothermal reforming reaction is one of the technologies with broad application prospects in energy transformation. Compared with traditional special oil internal combustion engines, the special oil as a propulsion fuel coupled with solid oxide fuel cell system has higher energy efficiency, lower noise emissions, less vibration, and cleaner exhaust (no odor, no smoke, no pollutants).

[0003] In the special oil autothermal reforming reaction coupled solid oxide fuel cell system, the process control of the special oil autothermal reforming reactor determines the hydrogen production flow rate, and the hydrogen production flow rate determines the power generation efficiency and operation stability of the special oil autothermal reforming reaction coupled solid oxide fuel cell system. Therefore, for the special oil autothermal reforming reaction coupled solid oxide fuel cell system, it is very critical to achieve effective control of the special oil autothermal reforming reaction. At present, there is no effective method to control the autothermal reforming reaction of special oil. Generally, the control method of methane fuel processor (steam reforming) is borrowed, that is, through different manipulators and multiple closed control loops, which consists of feedforward terms and feedback multivariable linear controllers. This fairly general method uses a linearized process model to automatically select measurement variables (sensor positions) and pair them with manipulated variables. In certain cases, multiple linear controllers will be generated, increasing the complexity of control. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a special oil autothermal reforming reaction control method and related equipment for SOFC, which aims to solve the problem of complex control of special oil autothermal reforming reaction in a special oil autothermal reforming coupled solid oxide fuel cell system.

[0005] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0006] According to a first aspect of the present invention, there is provided a method for controlling a special oil autothermal reforming reaction for SOFC, comprising:

[0007] According to the discharge current of SOFC, determine the open-ring oxygen-carbon ratio variable that needs to be regulated;

[0008] According to the actual temperature of the autothermal reforming reaction, the closed-loop oxygen-carbon ratio variable that needs to be regulated is determined;

[0009] Calculating the actually required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable, and the closed-loop oxygen-carbon ratio variable;

[0010] According to the discharge current of the SOFC and the actually required oxygen-carbon ratio, the fuel flow rate, water flow rate and air flow rate input into the special oil autothermal reforming reactor are calculated respectively using a fuel flow rate calculation model, a water flow rate calculation model and an air flow rate calculation model;

[0011] The autothermal reforming reaction is controlled according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor.

[0012] In a possible implementation of the first aspect, the actually required oxygen-carbon ratio is calculated according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable, and the closed-loop oxygen-carbon ratio variable, and the calculation formula is:

[0013]

[0014] In the formula, is the actual required oxygen-to-carbon ratio; is the initial oxygen-carbon ratio; is the open ring oxygen-carbon ratio variable; is the closed-loop oxygen-carbon ratio variable.

[0015] In a possible implementation manner of the first aspect, the fuel flow calculation model is:

[0016]

[0017]

[0018] In the formula, The fuel flow rate input to the specialty oil autothermal reforming reactor; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output specialty oil autothermal reforming reactor; is the fuel stoichiometric ratio; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0019] In a possible implementation manner of the first aspect, the water flow calculation model is:

[0020]

[0021]

[0022]

[0023] In the formula, is the water flow rate input into the specialty oil autothermal reforming reactor; is the steam-carbon ratio; The fuel flow rate input to the specialty oil autothermal reforming reactor; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output specialty oil autothermal reforming reactor; is the fuel stoichiometric ratio; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0024] In a possible implementation manner of the first aspect, the air flow calculation model is:

[0025]

[0026]

[0027]

[0028] In the formula, The air flow rate input into the specialty oil autothermal reforming reactor; The fuel flow rate input to the specialty oil autothermal reforming reactor; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output specialty oil autothermal reforming reactor; is the fuel stoichiometric ratio; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0029] In a possible implementation of the first aspect, the open-ring oxygen-carbon ratio variable that needs to be regulated is determined according to the discharge current of the SOFC, specifically:

[0030] Obtaining the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges, wherein the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges is preset;

[0031] The discharge current range corresponding to the discharge current of the SOFC is determined, and the open-ring oxygen-carbon ratio variable that needs to be regulated is determined according to the change rate of the open-ring oxygen-carbon ratio variable corresponding to the determined discharge current range.

[0032] In a possible implementation of the first aspect, the closed-loop oxygen-to-carbon ratio variable that needs to be regulated is determined according to the actual temperature of the autothermal reforming reaction, specifically:

[0033] Obtaining the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges, wherein the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges is preset;

[0034] The actual temperature range corresponding to the actual temperature of the autothermal reforming reaction is determined, and the closed-loop oxygen-carbon ratio variable that needs to be regulated is determined according to the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the determined actual temperature range.

[0035] According to a second aspect of the present invention, there is provided a special oil autothermal reforming reaction control device for SOFC, comprising:

[0036] An open-ring oxygen-carbon ratio variable determination module is used to determine the open-ring oxygen-carbon ratio variable that needs to be regulated according to the discharge current of the SOFC;

[0037] A closed-loop oxygen-carbon ratio variable determination module is used to determine the closed-loop oxygen-carbon ratio variable that needs to be regulated according to the actual temperature of the autothermal reforming reaction;

[0038] An oxygen-carbon ratio calculation module, used to calculate the actually required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable;

[0039] A raw material delivery flow calculation module, for calculating the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor respectively according to the discharge current of the SOFC and the actually required oxygen-carbon ratio using a fuel flow calculation model, a water flow calculation model and an air flow calculation model;

[0040] The raw material delivery flow control module is used to control the autothermal reforming reaction according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor.

[0041] According to a third aspect of the present invention, there is provided a device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method for controlling the autothermal reforming reaction of special oil for SOFC is implemented.

[0042] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method for controlling a special oil autothermal reforming reaction for SOFC is implemented.

[0043] Compared with the prior art, the present invention has at least the following beneficial effects:

[0044] The present invention provides a method for controlling the autothermal reforming reaction of a special oil for SOFC, which only needs to determine the open-loop oxygen-carbon ratio variable that needs to be regulated according to the discharge current of the SOFC, determine the closed-loop oxygen-carbon ratio variable that needs to be regulated according to the actual temperature of the autothermal reforming reaction, calculate the actual required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable, and calculate the fuel flow, water flow and air flow input to the special oil autothermal reforming reactor according to the discharge current of the SOFC and the actual required oxygen-carbon ratio, and finally control the autothermal reforming reaction according to the fuel flow, water flow and air flow input to the special oil autothermal reforming reactor. Compared with the traditional control, it is simpler, reduces the controller requirements while ensuring the stable output of hydrogen, and can realize dynamic control, simplify the control of the special oil autothermal reforming reaction, realize the effective control of the special oil autothermal reforming reaction, and improve the power generation efficiency and operation stability of the special oil autothermal reforming reaction coupled solid oxide fuel cell system.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0047] Figure 1 This is a flow chart of a method for controlling autothermal reforming reaction of special oil for SOFC according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of a special oil autothermal reforming reaction control device for SOFC according to an embodiment of the present invention.

[0049] In the figure: 1-current load limiting module; 2-open-loop oxygen-carbon ratio variable determination module; 3-closed-loop oxygen-carbon ratio variable determination module; 4-oxygen-carbon ratio calculation module; 5-raw material delivery flow calculation module; 6-fuel flow control unit; 7-water flow control unit; 8-air flow control unit; 9-fuel pump; 10-fuel flow meter; 11-water pump; 12-water flow meter; 13-air compressor; 14-air flow meter; 15-special oil autothermal reforming reactor. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] As a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, a method for controlling the autothermal reforming reaction of special oil for SOFC specifically comprises the following steps:

[0052] S1. Determine the open-ring oxygen-carbon ratio variable that needs to be regulated based on the discharge current of SOFC.

[0053] Specifically, the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges is first obtained, and finally the discharge current range corresponding to the discharge current of the SOFC is determined, and the open-ring oxygen-carbon ratio variable that needs to be regulated is determined according to the change rate of the open-ring oxygen-carbon ratio variable corresponding to the determined discharge current range.

[0054] It should be noted that the rate of change of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges is obtained in advance through experiments, specifically: according to the operating requirements of the SOFC, the discharge current range of the SOFC is determined, and different discharge currents are selected at equal intervals within the discharge current range of the SOFC for simulation experiments to obtain the open-ring oxygen-carbon ratio variables corresponding to different discharge currents, and then the rate of change of the open-ring oxygen-carbon ratio variables corresponding to different discharge current ranges are obtained.

[0055] It should also be noted that the open-ring oxygen-carbon ratio variable is a direct mapping between the discharge current of the SOFC and the actual required oxygen-carbon ratio change in the control of the special oil autothermal reforming reaction of the SOFC. The open-ring oxygen-carbon ratio variable can respond to changes in the discharge current of the SOFC.

[0056] S2. Determine the closed-loop oxygen-to-carbon ratio variable that needs to be regulated based on the actual temperature of the autothermal reforming reaction.

[0057] Specifically, the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges is first obtained, and finally the actual temperature range corresponding to the actual temperature of the autothermal reforming reaction is determined, and the closed-loop oxygen-carbon ratio variable that needs to be regulated is determined based on the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the determined actual temperature range.

[0058] It should also be noted that the rate of change of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges is obtained in advance through experiments, specifically: the actual temperature fluctuation range of the autothermal reforming reaction is estimated according to the initial temperature of the autothermal reforming reaction, and different actual temperatures of the autothermal reforming reaction are set at equal intervals within the estimated actual temperature fluctuation range of the autothermal reforming reaction to perform simulation experiments, so as to obtain the closed-loop oxygen-carbon ratio variables corresponding to different actual temperatures of the autothermal reforming reaction, and then obtain the rate of change of the closed-loop oxygen-carbon ratio variables corresponding to different actual temperature ranges.

[0059] The closed-loop oxygen-to-carbon ratio variable is a mapping between the initial temperature and the actual temperature change of the special oil autothermal reforming reaction in the special oil autothermal reforming reaction control of SOFC. The closed-loop oxygen-to-carbon ratio variable can respond to the change of the actual temperature of the special oil autothermal reforming reaction.

[0060] It should be understood that the actual temperature of the autothermal reforming reaction is acquired through real-time collection by a temperature sensor.

[0061] S3. Calculate the actually required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable.

[0062] Specifically, the actual required oxygen-to-carbon ratio is calculated as follows:

[0063]

[0064] In the formula, is the actual required oxygen-to-carbon ratio; is the initial oxygen-carbon ratio; is the open ring oxygen-carbon ratio variable; is the closed-loop oxygen-carbon ratio variable.

[0065] S4. According to the discharge current of the SOFC and the actually required oxygen-carbon ratio, the fuel flow rate, water flow rate and air flow rate input into the special oil autothermal reforming reactor 15 are calculated respectively using a fuel flow rate calculation model, a water flow rate calculation model and an air flow rate calculation model.

[0066] Preferably, the fuel flow calculation model is:

[0067]

[0068]

[0069] In the formula, is the fuel flow rate input into the special oil autothermal reforming reactor 15; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output special oil autothermal reforming reactor 15; is the fuel stoichiometric ratio, which is the inverse of the hydrogen utilization coefficient and is usually taken as 1.25; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0070] Preferably, the water flow calculation model is:

[0071]

[0072]

[0073]

[0074] In the formula, is the water flow rate input into the specialty oil autothermal reforming reactor 15; is the steam-carbon ratio; is the fuel flow rate input into the special oil autothermal reforming reactor 15; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output special oil autothermal reforming reactor 15; is the fuel stoichiometric ratio, which is the inverse of the hydrogen utilization coefficient and is usually taken as 1.25; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0075] Preferably, the air flow calculation model is:

[0076]

[0077]

[0078]

[0079] In the formula, is the air flow rate input into the specialty oil autothermal reforming reactor 15; is the fuel flow rate input into the special oil autothermal reforming reactor 15; is the actual required oxygen-to-carbon ratio; and For fuel The composition of The theoretical hydrogen flow rate of the output special oil autothermal reforming reactor 15; is the fuel stoichiometric ratio, which is the inverse of the hydrogen utilization coefficient and is usually taken as 1.25; is the discharge current of SOFC; is the number of cells connected in series in the SOFC.

[0080] S5. Controlling the autothermal reforming reaction according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor 15.

[0081] Specifically, the delivery flow of the fuel delivery module is controlled according to the fuel flow input into the special oil autothermal reforming reactor 15, the delivery flow of the water delivery module is controlled according to the water flow input into the special oil autothermal reforming reactor 15, and the delivery flow of the air delivery module is controlled according to the air flow input into the special oil autothermal reforming reactor 15, thereby ultimately achieving effective control of the special oil autothermal reforming reaction.

[0082] It should be noted that, in this embodiment, The unit is A , The unit is mol / min , The unit is mol / min , The unit is mol / min .

[0083] In one embodiment, if Figure 2 As shown, the present invention provides a special oil autothermal reforming reaction control device for SOFC, which is used to implement the special oil autothermal reforming reaction control method for SOFC mentioned in the above embodiment, specifically comprising:

[0084] The open-ring oxygen-carbon ratio variable determination module 2 is used to determine the open-ring oxygen-carbon ratio variable that needs to be regulated according to the discharge current of the SOFC;

[0085] A closed-loop oxygen-to-carbon ratio variable determination module 3 is used to determine the closed-loop oxygen-to-carbon ratio variable that needs to be regulated according to the actual temperature of the autothermal reforming reaction;

[0086] An oxygen-carbon ratio calculation module 4 is used to calculate the actually required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable;

[0087] The raw material delivery flow calculation module 5 is used to calculate the fuel flow, water flow and air flow input to the special oil autothermal reforming reactor 15 according to the discharge current of the SOFC and the actually required oxygen-carbon ratio using a fuel flow calculation model, a water flow calculation model and an air flow calculation model;

[0088] The raw material delivery flow control module is used to control the autothermal reforming reaction according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor 15.

[0089] Better, such as Figure 2 As shown, the raw material delivery flow control module includes a fuel flow control unit 6, a water flow control unit 7 and an air flow control unit 8, wherein:

[0090] A fuel flow control unit 6, used to control the delivery flow of the fuel delivery module according to the fuel flow input into the special oil autothermal reforming reactor 15;

[0091] A water flow control unit 7, used to control the delivery flow of the water flow delivery module according to the water flow input into the special oil autothermal reforming reactor 15;

[0092] The air flow control unit 8 is used to control the delivery flow of the air delivery module according to the air flow input into the special oil autothermal reforming reactor 15 .

[0093] More specifically, the fuel delivery module includes a fuel pump 9 and a fuel flow meter 10. The fuel flow control unit 6 controls the delivery flow of the fuel pump 9 according to the fuel flow input into the special oil autothermal reforming reactor 15, and at the same time uses the fuel flow meter 10 to monitor the fuel flow and feeds back the monitoring results to the fuel flow control unit 6.

[0094] Similarly, the water flow transport module includes a water pump 11 and a water flow meter 12. The water flow control unit 7 controls the delivery flow of the water pump 11 according to the water flow input into the special oil autothermal reforming reactor 15, and at the same time uses the water flow meter 12 to monitor the water flow and feeds back the monitoring results to the water flow control unit 7.

[0095] Similarly, the air delivery module includes an air compressor 13 and an air flow meter 14. The air flow control unit 8 controls the delivery flow of the air compressor 13 according to the air flow input into the special oil autothermal reforming reactor 15, and at the same time uses the air flow meter 14 to monitor the air flow and feeds back the monitoring results to the air flow control unit 8.

[0096] That is, the fuel, air and water enter the special oil autothermal reforming reactor 15 through the fuel pump 9, the air compressor 13 and the water pump 11 through their respective flow meters, and the hydrogen generated in the special oil autothermal reforming reactor 15 is fed into the SOFC power system.

[0097] Preferably, a special oil autothermal reforming reaction control device for SOFC further includes a current load limiting module 1 for limiting the fluctuation range of the discharge current of SOFC to ensure that the special oil autothermal reforming reaction proceeds stably.

[0098] All relevant contents of each step involved in the aforementioned embodiment of a method for controlling a special oil autothermal reforming reaction for SOFC can be referred to the functional description of the functional module corresponding to the control device for a special oil autothermal reforming reaction for SOFC in the embodiment of the present invention, and will not be repeated here. The division of modules in the embodiment of the present invention is schematic, which is only a logical function division. There may be other division methods in actual implementation. In addition, each functional module in each embodiment of the present invention can be integrated into a processor, or it can exist physically separately, or two or more modules can be integrated into one module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules.

[0099] The following is an explanation of a method for controlling autothermal reforming reaction of special oil for SOFC according to the present invention in conjunction with a specific implementation case.

[0100] Taking the special oil autothermal reforming reaction coupled with SOFC power system of underwater vehicle as an example, the hydrogen required by SOFC comes from the special oil autothermal reforming reactor 15, SOFC generates electric current by consuming hydrogen, and the special oil autothermal reforming reaction is controlled by the above control method of the present invention, which is as follows:

[0101] In the SOFC power system coupled with the special oil autothermal reforming reaction of the underwater vehicle, the discharge current range of the SOFC is 90A-144A. Different discharge currents are selected at equal intervals in this range for preliminary experiments to obtain the open-ring oxygen-carbon ratio variables corresponding to different discharge currents, as shown in Table 1, and then the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges can be obtained. For example, the change rate of the open-ring oxygen-carbon ratio variable corresponding to the discharge current range of 90A-108A is -0.0028, the change rate of the open-ring oxygen-carbon ratio variable corresponding to the discharge current range of 108A-126A is -0.0017, and the change rate of the open-ring oxygen-carbon ratio variable corresponding to the discharge current range of 126A-144A is -0.0011.

[0102] Table 1 Open ring oxygen-carbon ratio variables corresponding to different discharge currents

[0103]

[0104] In the special oil autothermal reforming reaction coupled SOFC power system of the underwater vehicle, the initial temperature of the autothermal reforming reaction is 940°C, and the actual temperature fluctuation range of the autothermal reforming reaction is estimated to be 938°C-946°C. Different actual temperatures of the autothermal reforming reaction are set at equal intervals within the estimated actual temperature fluctuation range of the autothermal reforming reaction for preliminary experiments, and the closed-loop oxygen-carbon ratio variables corresponding to different actual temperatures of the autothermal reforming reaction are obtained, as shown in Table 2, and the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges can be obtained. For example, the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the actual temperature range of 938°C-940°C is 0.05, the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the actual temperature range of 940°C-942°C is 0.01, the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the actual temperature range of 942°C-944°C is 0.03, and the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the actual temperature range of 944°C-946°C is 0.01.

[0105] Table 2 The closed-loop oxygen-carbon ratio corresponding to different actual temperatures of the autothermal reforming reaction

[0106]

[0107] At a certain moment, the discharge current of SOFC in the SOFC power system of the underwater vehicle's special oil autothermal reforming reaction coupling was 130A, the actual temperature was 938.7℃, the initial oxygen-carbon ratio was 1.07, the steam-carbon ratio was 2.05, and the number of cells connected in series in the SOFC was 55. Take 14, Take 26, and the fuel stoichiometric ratio is 1.25. Combined with Table 1, the open-loop oxygen-carbon ratio variable that needs to be regulated is -0.104; combined with Table 2, the closed-loop oxygen-carbon ratio variable that needs to be regulated is -0.065, and then the actual required oxygen-carbon ratio is calculated to be 0.901, which is about 0.90.

[0108] In this embodiment, the current load limiting module 1 limits the discharge current fluctuation of SOFC to ±1.5A / s, ensuring that the special oil autothermal reforming reaction coupled with the SOFC power system is in a stable state. According to the discharge current of SOFC and the actual required oxygen-carbon ratio, the fuel flow calculation model, the water flow calculation model and the air flow calculation model are used to calculate the fuel flow rate input into the special oil autothermal reforming reactor 15 to be 0.098 mol / min (18.99 g / min ), the water flow rate of the special oil autothermal reforming reactor 15 is 2.81 mol / min (50.60 g / min ) and the air flow rate of the special oil autothermal reforming reactor 15 is 2.94 mol / min (66.69 L / min), the autothermal reforming reactor is controlled according to the fuel flow, water flow and air flow input to the special oil autothermal reforming reactor 15. During the actual operation of the special oil autothermal reforming reaction coupled SOFC power system of the underwater vehicle, the actual hydrogen flow output from the special oil autothermal reforming reactor 15 is 2.61 mol / min (59.26 L / min ), and the theoretical hydrogen flow rate of the output special oil autothermal reforming reactor 15 is 2.78 mol / min (63.12 L / min ) are basically close.

[0109] Through open-loop and closed-loop control, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable are adjusted according to the actual temperature of the special oil autothermal reforming reaction and the discharge current of the SOFC. The entire system can be automatically adjusted as the operating conditions change, ensuring that the hydrogen production flow rate can meet the SOFC power generation demand and achieving stable operation of the special oil autothermal reforming reaction coupled with the SOFC power system.

[0110] For the special oil autothermal reforming reaction coupled with the SOFC power system, the special oil autothermal reforming reaction is the main way to obtain hydrogen-rich gas, which determines whether the SOFC can continue to operate under a stable supply of raw gas. The main command signal for the control of the special oil autothermal reforming reaction is the discharge current of the SOFC, and thus, the special oil autothermal reforming reaction must provide enough theoretical hydrogen flow to the SOFC. In order to meet the power generation of the SOFC, it is necessary to control the supply flow of fuel, water and air in an appropriate amount. In the special oil autothermal reforming reaction, the exothermic partial oxidation reaction and the endothermic steam reforming reaction are carried out in parallel. The temperature control of the special oil autothermal reforming reaction is very important. If the temperature is too low, the fuel may not be completely converted, and the residual unconverted hydrocarbons will damage the downstream reactor and the fuel cell stack. On the other hand, if the temperature is too high, the special oil autothermal reforming reaction may be damaged, and the catalyst will also be damaged. In combination with this embodiment, it can be seen that the present invention is based on a simple static mass balance and open-loop feedforward control, which simplifies the control while ensuring the stable output of hydrogen.

[0111] In another embodiment of the present invention, a computer device is provided, the computer device comprising a processor and a memory, the memory is used to store a computer program, the computer program comprises program instructions, and the processor is used to execute the program instructions stored in the computer storage medium. The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc., which are the computing core and control core of the terminal, which are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the computer storage medium to implement the corresponding method flow or corresponding function; the processor described in the embodiment of the present invention can be used for the operation of a special oil autothermal reforming reaction control method for SOFC.

[0112] In another embodiment of the present invention, the present invention also provides a storage medium, specifically a computer-readable storage medium, which is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed random access memory or a non-volatile memory, such as at least one disk storage. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the above-mentioned embodiment of a method for controlling the autothermal reforming reaction of a special oil for SOFC.

[0113] It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program code.

[0114] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0115] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0116] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0117] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0118] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the aforementioned embodiments, those of ordinary skill in the art should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed by the present invention, or can easily conceive of changes, or make equivalent replacements for some of the technical features therein. Such modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the protection scope of the present invention.

Claims

1. A method for controlling the autothermal reforming reaction of special oil for SOFC, characterized in that: include: According to the discharge current of SOFC, determine the open-ring oxygen-carbon ratio variable that needs to be regulated; According to the actual temperature of the autothermal reforming reaction, the closed-loop oxygen-carbon ratio variable that needs to be regulated is determined; According to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable, the actual required oxygen-carbon ratio is calculated, and the calculation formula is: OCR=OCR Nom +ΔOCR Map +ΔOCR CI Where, OCR is the actual required oxygen-carbon ratio; OCR Nom is the initial oxygen-carbon ratio; ΔOCR Map is the open ring oxygen-carbon ratio variable; ΔOCR CI is the closed-loop oxygen-carbon ratio variable; According to the discharge current of the SOFC and the actually required oxygen-carbon ratio, the fuel flow rate, water flow rate and air flow rate input into the special oil autothermal reforming reactor are calculated respectively using a fuel flow rate calculation model, a water flow rate calculation model and an air flow rate calculation model; The fuel flow calculation model is: f Fuel_FP_IN =φ H2_FP_OUT / (x(2-OCR)+0.5y) φ H2_FP_OUT =k R I Req N Cells / 3215.75 In the formula, φ Fuel_FP_IN is the fuel flow rate input to the special oil autothermal reforming reactor; OCR is the actual required oxygen-carbon ratio; x and y are the fuel C x H y The composition of H2_FP_OUT k is the theoretical hydrogen flow rate of the output special oil autothermal reforming reactor; R is the fuel stoichiometric ratio; I Req is the discharge current of SOFC; N Cells is the number of cells connected in series in SOFC; The water flow calculation model is: φ Water_FP_IN =φ Fuel_FP_IN ·xSCR f Fuel_FP_IN =φ H2_FP_OUT / (x(2-OCR)+0.5y) φ H2_FP_OUT =k R I Req N Cells / 3215.7 In the formula, φ Water_FP_IN is the water flow rate input into the special oil autothermal reforming reactor; SCR is the steam-carbon ratio; φ Fuel_FP_IN is the fuel flow rate input to the special oil autothermal reforming reactor; OCR is the actual required oxygen-carbon ratio; x and y are the fuel C x H y The composition of H2_FP_OUT k is the theoretical hydrogen flow rate of the output special oil autothermal reforming reactor; R is the fuel stoichiometric ratio; I Req is the discharge current of SOFC; N Cells is the number of cells connected in series in SOFC; The air flow calculation model is: f Air_FP_IN =φ Fuel_FP_IN ·(0.5xOCR / 0.21) f Fuel_FP_IN =φ H2_FP_OUT / (x(2-OCR)+0.5y) φ H2_FP_OUT =k R I Req N Cells / 3215.7 In the formula, φ Air_FP_IN is the air flow rate input into the special oil autothermal reforming reactor; φ Fuel_FP_IN is the fuel flow rate input to the special oil autothermal reforming reactor; OCR is the actual required oxygen-carbon ratio; x and y are the fuel C x H y The composition of H2_FP_OUT k is the theoretical hydrogen flow rate of the output special oil autothermal reforming reactor; R is the fuel stoichiometric ratio; I Req is the discharge current of SOFC; N Cells is the number of cells connected in series in SOFC; The autothermal reforming reaction is controlled according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor.

2. A method for controlling autothermal reforming reaction of special oil for SOFC according to claim 1, characterized in that: The open-ring oxygen-carbon ratio variable that needs to be regulated is determined according to the discharge current of the SOFC, specifically: Obtaining the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges, wherein the change rate of the open-ring oxygen-carbon ratio variable corresponding to different discharge current ranges is preset; The discharge current range corresponding to the discharge current of the SOFC is determined, and the open-ring oxygen-carbon ratio variable that needs to be regulated is determined according to the change rate of the open-ring oxygen-carbon ratio variable corresponding to the determined discharge current range.

3. The method for controlling the autothermal reforming reaction of special oil for SOFC according to claim 1, characterized in that: The closed-loop oxygen-to-carbon ratio variable that needs to be regulated is determined according to the actual temperature of the autothermal reforming reaction, specifically: Obtaining the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges, wherein the change rate of the closed-loop oxygen-carbon ratio variable corresponding to different actual temperature ranges is preset; The actual temperature range corresponding to the actual temperature of the autothermal reforming reaction is determined, and the closed-loop oxygen-carbon ratio variable that needs to be regulated is determined according to the change rate of the closed-loop oxygen-carbon ratio variable corresponding to the determined actual temperature range.

4. A special oil autothermal reforming reaction control device for SOFC, characterized in that: A method for controlling the autothermal reforming reaction of a special oil for SOFC according to any one of claims 1 to 3, comprising: An open-ring oxygen-carbon ratio variable determination module is used to determine the open-ring oxygen-carbon ratio variable that needs to be regulated according to the discharge current of the SOFC; A closed-loop oxygen-carbon ratio variable determination module is used to determine the closed-loop oxygen-carbon ratio variable that needs to be regulated according to the actual temperature of the autothermal reforming reaction; An oxygen-carbon ratio calculation module, used to calculate the actually required oxygen-carbon ratio according to the initial oxygen-carbon ratio, the open-loop oxygen-carbon ratio variable and the closed-loop oxygen-carbon ratio variable; A raw material delivery flow calculation module, for calculating the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor respectively according to the discharge current of the SOFC and the actually required oxygen-carbon ratio using a fuel flow calculation model, a water flow calculation model and an air flow calculation model; The raw material delivery flow control module is used to control the autothermal reforming reaction according to the fuel flow, water flow and air flow input into the special oil autothermal reforming reactor.

5. A device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a method for controlling autothermal reforming reaction of special oil for SOFC as claimed in any one of claims 1 to 3 is implemented.

6. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, a method for controlling autothermal reforming reaction of special oil for SOFC as claimed in any one of claims 1 to 3 is implemented.

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