Fuel self-adaptive control system and method for multi-fuel multi-fuel combustion boiler

Abstract

The invention relates to the technical field of fuel adjustment, in particular to a fuel self-adaptive control system and method for a multi-fuel multi-fuel combustion boiler, and the fuel self-adaptive control system for the multi-fuel multi-fuel combustion boiler comprises a flue gas detection module, a central control module, an instruction execution module and a flow detection module; the flue gas detection module is used for collecting the concentration data of each component of flue gas discharged by the multi-fuel combustion boiler and the flue gas temperature data at preset time intervals, and sending the concentration data of each component of the flue gas and the flue gas temperature data to the central control module; the central control module compares the concentration data of each component of the flue gas and the flue gas temperature data with a preset threshold value for judgment, if the concentration data of each component of the flue gas and the flue gas temperature data are found to be abnormal, a corresponding adjusting instruction is determined, and the adjusting instruction is sent to an instruction execution module; and the instruction execution module adjusts the flow of the hydrogen-containing tail gas, the combustible liquid and the air according to the adjusting instruction.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel regulation, and in particular to a fuel adaptive control system and method for a multi-fuel mixed-firing boiler. Background Art

[0002] Hydrogen-containing tail gas mainly comes from various reactions in the chemical production process, such as catalytic cracking, hydrocracking, reforming, etc. These tail gases are mainly composed of hydrogen, methane, carbon monoxide, carbon dioxide, etc., among which the hydrogen content is relatively high and has a high utilization value. Hydrogen has a high content and high calorific value and is a high-quality energy and chemical raw material.

[0003] At present, air is used as a combustion aid, and a mixed-firing boiler is used to mix and burn hydrogen-containing exhaust gas and combustible liquid. However, the existing mixed-firing boiler cannot automatically adjust the flow rate of hydrogen-containing exhaust gas, combustible liquid and air to adjust the ratio of the three during combustion, which easily leads to the concentration of carbon monoxide or nitrogen oxides in the exhaust flue gas exceeding the environmental protection standards. Summary of the invention

[0004] The object of the present invention is to provide a fuel adaptive control system and method for a multi-fuel mixed-firing boiler, which can automatically adjust the flow rates of hydrogen-containing tail gas, combustible liquid and air during the combustion process to avoid the flue gas failing to meet environmental protection standards.

[0005] To achieve the above-mentioned object, in a first aspect, the present invention provides a fuel adaptive control system for a multi-fuel mixed-firing boiler, comprising a smoke detection module, a central control module, an instruction execution module and a flow detection module;

[0006] The central control module is connected to the smoke detection module; the instruction execution module is connected to the central control module; the flow detection module is connected to the central control module;

[0007] The flue gas detection module is used to collect the concentration data of each component and the flue gas temperature data of the flue gas discharged by the mixed-firing boiler at every preset time interval, and send the concentration data of each component and the flue gas temperature data of the flue gas to the central control module;

[0008] The central control module is used to compare and judge the concentration data of each component of the smoke and the smoke temperature data with the preset threshold value, and if it is found that the concentration data of each component of the smoke and the smoke temperature data are abnormal, determine the corresponding adjustment instruction, and send the adjustment instruction to the instruction execution module;

[0009] The instruction execution module is used to adjust the flow rates of hydrogen-containing tail gas, flammable liquid and air according to the adjustment instructions;

[0010] The flow detection module is used to collect the flow data of hydrogen-containing tail gas, combustible liquid and air in real time, and feed it back to the central control module in real time.

[0011] Wherein, the smoke detection module includes an oxygen concentration detection unit, a carbon monoxide concentration detection unit, a nitrogen oxide concentration detection unit and a temperature detection unit;

[0012] The oxygen concentration detection unit is used to collect oxygen concentration data in the flue gas discharged from the mixed-firing boiler;

[0013] The carbon monoxide concentration detection unit is used to collect carbon monoxide concentration data in the flue gas discharged from the mixed-firing boiler;

[0014] The nitrogen oxide concentration detection unit is used to collect nitrogen oxide concentration data in the flue gas discharged from the mixed-firing boiler;

[0015] The temperature detection unit is used to collect temperature data of the flue gas discharged from the mixed-firing boiler.

[0016] Wherein, the central control module includes a threshold preset unit, an instruction preset unit and a processing unit; the processing unit is connected to the threshold preset unit and the instruction preset unit respectively;

[0017] The threshold value preset unit is used for the staff to preset the threshold values ​​of the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and temperature of the flue gas discharged from the mixed-firing boiler;

[0018] The instruction preset unit is used for staff to preset adjustment instructions in various abnormal situations;

[0019] The processing unit is used to compare the oxygen concentration data, carbon monoxide concentration data, nitrogen oxide concentration data and temperature data of the flue gas discharged from the mixed-firing boiler received from the flue gas detection module with the preset threshold values. If an abnormality is found, the corresponding adjustment instruction is retrieved from the instruction preset unit according to the specific situation of the abnormality and sent to the instruction execution module.

[0020] Wherein, the central control module further comprises a communication unit, and the communication unit is connected to the processing unit;

[0021] The communication unit is used to establish a communication connection with the smoke detection module, the instruction execution module and the flow detection module.

[0022] Wherein, the instruction execution module includes a hydrogen-containing tail gas flow regulating unit, a flammable liquid flow regulating unit and an air flow regulating unit;

[0023] The hydrogen-containing tail gas flow rate regulating unit is used to regulate the flow rate of the hydrogen-containing tail gas according to the regulation instruction;

[0024] The flammable liquid flow rate regulating unit is used to regulate the flow rate of the flammable liquid according to the regulation instruction;

[0025] The air flow regulating unit is used to regulate the air flow according to the regulating instruction.

[0026] Wherein, the flow detection module includes a hydrogen-containing tail gas flow detection unit, a flammable liquid flow detection unit and an air flow detection unit;

[0027] The hydrogen-containing tail gas flow detection unit is used to collect flow data of the hydrogen-containing tail gas;

[0028] The flammable liquid flow detection unit is used to collect flow data of the flammable liquid;

[0029] The air flow detection unit is used to collect air flow data.

[0030] Wherein, the multi-fuel mixed-firing boiler fuel adaptive control system further includes an optimization module; the optimization module is connected to the central control module;

[0031] The optimization module is used to collect the historical collection data of the smoke detection module and the corresponding adjustment instructions determined by the central control module, establish a learning model, and deeply optimize the adjustment instructions issued by the central control module.

[0032] In a second aspect, the present invention further provides a fuel adaptive control method for a multi-fuel mixed-firing boiler, comprising:

[0033] The flue gas detection module collects the concentration data of each component and the temperature data of the flue gas discharged from the mixed-firing boiler at every preset time interval, and sends the concentration data of each component and the temperature data of the flue gas to the central control module;

[0034] The central control module compares the concentration data of each component of the flue gas and the flue gas temperature data with the preset threshold value. If the concentration data of each component of the flue gas and the flue gas temperature data are found to be abnormal, the central control module determines the corresponding adjustment instruction and sends the adjustment instruction to the instruction execution module;

[0035] The instruction execution module adjusts the flow of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instructions.

[0036] The present invention provides a fuel adaptive control system and method for a multi-fuel mixed-firing boiler. The flue gas detection module is used to detect the concentration of each component of the flue gas discharged from the multi-fuel mixed-firing boiler, specifically including the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration, and the temperature of the flue gas; the central control module is used for use by the administrator, and the concentration thresholds of carbon monoxide and nitrogen oxides in the flue gas and the flue gas temperature threshold are preset. If it is found that the concentrations of carbon monoxide and nitrogen oxides exceed the corresponding preset thresholds, the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and flue gas temperature in the flue gas collected by the flue gas detection module are detected. The flow rate of hydrogen-containing tail gas, combustible liquid and air is analyzed to determine the problems with the flow rate of hydrogen-containing tail gas, combustible liquid and air, and a corresponding adjustment instruction is generated and sent to the instruction execution module. The instruction execution module adjusts the flow rate of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instruction until the concentration of carbon monoxide and the concentration of nitrogen oxides in the exhausted flue gas are lower than the preset threshold value and meet the environmental protection standards. The flow detection module is used to feed back the flow rate of hydrogen-containing tail gas, combustible liquid and air to the central module in real time; thereby, the flow rate of hydrogen-containing tail gas, combustible liquid and air can be automatically adjusted during the combustion process to avoid the flue gas failing to meet the environmental protection standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0038] Figure 1 It is a schematic structural diagram of the first embodiment of the present invention.

[0039] Figure 2 It is a structural diagram of a smoke detection module according to the first embodiment of the present invention.

[0040] Figure 3 It is a schematic diagram of the structure of the central control module of the first embodiment of the present invention.

[0041] Figure 4 It is a schematic diagram of the structure of the instruction execution module of the first embodiment of the present invention.

[0042] Figure 5 It is a structural diagram of a flow detection module according to the first embodiment of the present invention.

[0043] Figure 6 It is a flowchart of the second embodiment of the present invention.

[0044] 1-smoke detection module, 2-central control module, 3-instruction execution module, 4-flow detection module, 5-optimization module, 11-oxygen concentration detection unit, 12-carbon monoxide concentration detection unit, 13-nitrogen oxide concentration detection unit, 14-temperature detection unit, 21-threshold setting unit, 22-instruction setting unit, 23-processing unit, 24-communication unit, 31-hydrogen-containing exhaust gas flow regulation unit, 32-flammable liquid flow regulation unit, 33-air flow regulation unit, 41-hydrogen-containing exhaust gas flow detection unit, 42-flammable liquid flow detection unit, 43-air flow detection unit. DETAILED DESCRIPTION

[0045] The first embodiment of the present application is:

[0046] See also Figure 1-Figure 5 ,in, Figure 1 It is a schematic structural diagram of the first embodiment of the present invention. Figure 2 It is a structural diagram of a smoke detection module according to the first embodiment of the present invention. Figure 3 It is a schematic diagram of the structure of the central control module of the first embodiment of the present invention. Figure 4 It is a schematic diagram of the structure of the instruction execution module of the first embodiment of the present invention. Figure 5 It is a structural diagram of a flow detection module according to the first embodiment of the present invention.

[0047] The present invention provides a fuel adaptive control system for a multi-fuel mixed-firing boiler: comprising a smoke detection module 1, a central control module 2, an instruction execution module 3 and a flow detection module 4; the smoke detection module 1 comprises an oxygen concentration detection unit 11, a carbon monoxide concentration detection unit 12, a nitrogen oxide concentration detection unit 13 and a temperature detection unit 14; the central control module 2 comprises a threshold preset unit 21, an instruction preset unit 22 and a processing unit 23; the central control module 2 also comprises a communication unit 24; the instruction execution module 3 comprises a hydrogen-containing tail gas flow regulating unit 31, a flammable liquid flow regulating unit 32 and an air flow regulating unit 33; the flow detection module 4 comprises a hydrogen-containing tail gas flow detection unit 41, a flammable liquid flow detection unit 42 and an air flow detection unit 43; the fuel adaptive control system for a multi-fuel mixed-firing boiler also comprises an optimization module 5; the optimization module 5 is connected to the central control module 2; through the above scheme, the flow of hydrogen-containing tail gas, flammable liquid and air can be automatically adjusted during the combustion process to avoid the smoke not meeting the environmental protection standards.

[0048] Furthermore, the central control module 2 is connected to the smoke detection module 1; the instruction execution module 3 is connected to the central control module 2; the flow detection module 4 is connected to the central control module 2;

[0049] The flue gas detection module 1 is used to collect the concentration data of each component and the temperature data of the flue gas discharged by the mixed-firing boiler at every preset time interval, and send the concentration data of each component and the temperature data of the flue gas to the central control module 2;

[0050] The central control module 2 is used to compare and judge the concentration data of each component of the smoke and the smoke temperature data with the preset threshold value. If the concentration data of each component of the smoke and the smoke temperature data are found to be abnormal, the corresponding adjustment instruction is determined and sent to the instruction execution module 3;

[0051] The instruction execution module 3 is used to adjust the flow rates of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instructions;

[0052] The flow detection module 4 is used to collect the flow data of hydrogen-containing tail gas, combustible liquid and air in real time, and feed it back to the central control module 2 in real time.

[0053] In this embodiment, the flue gas detection module 1 is used to detect the concentration of each component of the flue gas discharged from the multi-fuel mixed-firing boiler, specifically including the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration, and the temperature of the flue gas; the central control module 2 is used for use by the administrator, and the concentration thresholds of carbon monoxide and nitrogen oxides in the flue gas and the flue gas temperature threshold are preset. If it is found that the concentration of carbon monoxide and nitrogen oxides exceeds the corresponding preset threshold, the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and flue gas temperature in the flue gas collected by the flue gas detection module 1 are analyzed to determine The problems of hydrogen-containing exhaust gas flow, flammable liquid flow and air flow are detected, and corresponding adjustment instructions are generated and sent to the instruction execution module 3. The instruction execution module 3 adjusts the flow of hydrogen-containing exhaust gas, flammable liquid and air according to the adjustment instructions until the carbon monoxide concentration and nitrogen oxide concentration in the exhausted flue gas are lower than the preset threshold value and meet the environmental protection standards. The flow detection module 4 is used to feed back the flow of hydrogen-containing exhaust gas, flammable liquid and air to the central module in real time; thereby, the flow of hydrogen-containing exhaust gas, flammable liquid and air can be automatically adjusted during the combustion process to avoid the flue gas not meeting the environmental protection standards. For example: if the flue gas detection module 1 detects that the carbon monoxide concentration in the flue gas is higher than the preset threshold and the oxygen concentration is lower than the preset threshold, it means that there is less air, and an instruction to increase the air flow is generated at this time; if the carbon monoxide concentration in the flue gas is detected to be higher than the preset threshold and the oxygen concentration is substantially equal to the preset threshold, it means that the air flow is normal and it is not a problem of the air flow, and further judgment is made through the flue gas temperature. If the flue gas temperature is higher than the preset threshold, it means that there is too much hydrogen-containing exhaust gas, and an instruction to reduce the hydrogen-containing exhaust gas flow is generated at this time; if the carbon monoxide concentration in the flue gas is detected to be higher than the preset threshold and the oxygen concentration is substantially equal to the preset threshold, it means that the air flow is normal and it is not a problem of the air flow, and further judgment is made through the flue gas temperature. If the flue gas temperature is higher than the preset threshold, it means that there is too much hydrogen-containing exhaust gas, and an instruction to reduce the hydrogen-containing exhaust gas flow is generated at this time; Judging by the flue gas temperature, if the flue gas temperature is lower than the preset threshold, it means that there is too much flammable liquid, and at this time an instruction to lower the flow rate of the flammable liquid is generated; if the nitrogen oxide concentration is detected to be higher than the preset threshold, the oxygen concentration will also be detected to be higher than the preset threshold, indicating that there is more air, and at this time an instruction to lower the air flow is generated; after the flow rate is adjusted, it is necessary to wait for a period of time before the flue gas detection module 1 can detect changes in the carbon monoxide concentration and the nitrogen oxide concentration in the flue gas. Therefore, the flue gas detection module 1 needs to detect once at every preset time period until after a certain flow rate adjustment, it is found that the carbon monoxide concentration and the nitrogen oxide concentration return to normal and are lower than the preset threshold, and the adjustment can be stopped at this time.

[0054] Furthermore, the oxygen concentration detection unit 11 is used to collect oxygen concentration data in the flue gas discharged from the mixed-firing boiler;

[0055] The carbon monoxide concentration detection unit 12 is used to collect carbon monoxide concentration data in the flue gas discharged from the mixed-firing boiler;

[0056] The nitrogen oxide concentration detection unit 13 is used to collect nitrogen oxide concentration data in the flue gas discharged from the mixed-firing boiler;

[0057] The temperature detection unit 14 is used to collect temperature data of the flue gas discharged from the co-firing boiler.

[0058] In this embodiment, the oxygen concentration detection unit 11 adopts an electrochemical sensor for detection. The electrochemical sensor reacts with oxygen through an electrolyte to generate a current or voltage signal, and the signal intensity is proportional to the oxygen concentration; the carbon monoxide concentration detection unit 12 adopts a non-dispersive infrared (NDIR) analyzer. CO molecules have an absorption peak in the infrared spectrum of a specific wavelength, and the CO concentration is determined by measuring the absorption intensity of infrared light; the nitrogen oxide concentration detection unit 13 adopts a chemiluminescence (CLD) analyzer.

[0059] Further, the processing unit 23 is connected to the threshold setting unit 21 and the instruction setting unit 22 respectively;

[0060] The threshold value preset unit 21 is used for the staff to preset the threshold values ​​of the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and temperature of the flue gas discharged from the mixed-firing boiler;

[0061] The instruction preset unit 22 is used for staff to preset adjustment instructions under various abnormal conditions;

[0062] The processing unit 23 is used to compare the oxygen concentration data, carbon monoxide concentration data, nitrogen oxide concentration data and temperature data of the flue gas discharged from the mixed-firing boiler received from the flue gas detection module 1 with the preset threshold values. If an abnormality is found, the corresponding adjustment instruction is retrieved from the instruction preset unit 22 according to the specific situation of the abnormality and sent to the instruction execution module 3.

[0063] In this embodiment, the threshold preset unit 21 is used by the staff to preset the concentration thresholds of oxygen, carbon monoxide, nitrogen oxides in the flue gas and the threshold of the flue gas temperature according to the operation requirements and environmental protection standards of the boiler. These thresholds are used to determine whether the current combustion state is normal; the instruction preset unit 22 is used by the staff to preset corresponding adjustment instructions for various abnormal situations, for example, preset instructions to increase the air flow rate, which is used to deal with abnormal situations such as the carbon monoxide concentration in the flue gas is higher than the preset threshold and the oxygen concentration is lower than the preset threshold; the processing unit 23 is the core part of the central control module 2, which is responsible for comparing the data transmitted by the flue gas detection module 1 with the preset threshold. If any abnormality is found (such as a certain concentration exceeding the standard or temperature abnormality), the processing unit 23 will retrieve the corresponding adjustment instruction from the instruction preset unit 22 according to the specific situation of the abnormality and send it to the instruction execution module 3.

[0064] Further, the communication unit 24 is connected to the processing unit 23;

[0065] The communication unit 24 is used to establish a communication connection with the smoke detection module 1 , the instruction execution module 3 and the flow detection module 4 .

[0066] In this embodiment, the communication unit 24 is responsible for establishing communication connections with the smoke detection module 1, the instruction execution module 3 and the flow detection module 4 to ensure real-time transmission of data and timely issuance of instructions.

[0067] Furthermore, the hydrogen-containing tail gas flow rate regulating unit 31 is used to regulate the flow rate of the hydrogen-containing tail gas according to the regulating instruction;

[0068] The flammable liquid flow regulating unit 32 is used to regulate the flow of the flammable liquid according to the regulation instruction;

[0069] The air flow regulating unit 33 is used to regulate the air flow according to the regulating instruction.

[0070] In this embodiment, the hydrogen-containing exhaust gas flow regulating unit 31 adopts an electric regulating valve to control the opening of the hydrogen-containing exhaust gas pipeline and adjust the flow. The electric regulating valve can accurately adjust the valve opening according to the instructions of the central control module 2, thereby realizing continuous regulation of the hydrogen-containing exhaust gas flow; the flammable liquid flow regulating unit 32 also adopts an electric regulating valve to control the opening of the flammable liquid gas pipeline and adjust the flow. The electric regulating valve can accurately adjust the valve opening according to the instructions of the central control module 2, thereby realizing continuous regulation of the flammable liquid flow; the air flow regulating unit 33 also adopts an electric regulating valve to control the opening of the air-containing gas pipeline and adjust the flow. The electric regulating valve can accurately adjust the valve opening according to the instructions of the central control module 2, thereby realizing continuous regulation of the air flow.

[0071] Furthermore, the hydrogen-containing tail gas flow detection unit 41 is used to collect flow data of the hydrogen-containing tail gas;

[0072] The flammable liquid flow detection unit 42 is used to collect flow data of the flammable liquid;

[0073] The air flow detection unit 43 is used to collect air flow data.

[0074] In this embodiment, the hydrogen-containing exhaust gas flow detection unit 41 adopts a flow sensor, which is installed on the hydrogen-containing exhaust gas pipeline, monitors the hydrogen-containing exhaust gas flow in real time, and feeds back the data to the central control module 2; the flammable liquid flow detection unit 42 adopts a flow sensor, which is installed on the flammable liquid pipeline, monitors the flammable liquid flow in real time, and feeds back the data to the central control module 2; the air flow detection unit 43 adopts a flow sensor, which is installed on the air pipeline, monitors the air flow in real time, and feeds back the data to the central control module 2.

[0075] Further, the optimization module 5 is connected to the central control module 2;

[0076] The optimization module 5 is used to collect the historical collection data of the smoke detection module 1 and the corresponding adjustment instructions determined by the central control module 2, establish a learning model, and deeply optimize the adjustment instructions issued by the central control module 2.

[0077] In this embodiment, the optimization module 5 is an intelligent additional component, which is intended to further improve the system's adaptive ability and adjustment accuracy through machine learning and data analysis. The specific functions are as follows:

[0078] Data collection: The optimization module 5 collects the historical data collected by the smoke detection module 1 (such as oxygen, carbon monoxide, nitrogen oxide concentration and temperature) and the adjustment instructions determined by the central control module 2.

[0079] Learning model establishment: Based on the collected historical data, the optimization module 5 will establish a learning model to analyze the combustion characteristics under different working conditions and predict the optimal regulation strategy.

[0080] Deep optimization: Through continuous learning and optimization, the optimization module 5 can provide more intelligent adjustment suggestions to the central control module 2 and staff, help the system respond to abnormal situations more quickly, and achieve more precise combustion control.

[0081] The present embodiment provides a fuel adaptive control system for a multi-fuel mixed-firing boiler, wherein the flue gas detection module 1 is used to detect the concentration of each component of the flue gas discharged from the multi-fuel mixed-firing boiler, specifically including the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration, and the temperature of the flue gas; the central control module 2 is used for use by the administrator, and the concentration thresholds of carbon monoxide and nitrogen oxides in the flue gas and the flue gas temperature threshold are preset. If it is found that the concentrations of carbon monoxide and nitrogen oxides exceed the corresponding preset thresholds, the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and flue gas temperature collected by the flue gas detection module 1 are The flow rate of hydrogen-containing tail gas, combustible liquid and air is analyzed to determine the problems with the flow rate of hydrogen-containing tail gas, combustible liquid and air, and a corresponding adjustment instruction is generated and sent to the instruction execution module 3. The instruction execution module 3 adjusts the flow rate of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instruction until the concentration of carbon monoxide and the concentration of nitrogen oxides in the exhaust flue gas are lower than the preset threshold value and meet the environmental protection standards. The flow detection module 4 is used to feed back the flow rate of hydrogen-containing tail gas, combustible liquid and air to the central module in real time; thereby, the flow rate of hydrogen-containing tail gas, combustible liquid and air can be automatically adjusted during the combustion process to avoid the flue gas not meeting the environmental protection standards.

[0082] The second embodiment of the present application is:

[0083] See also Figure 6 ,in, Figure 6 It is a flowchart of the second embodiment of the present invention.

[0084] The present invention provides a fuel adaptive control method for a multi-fuel mixed-firing boiler, comprising:

[0085] S1 The flue gas detection module 1 collects the concentration data of each component and the flue gas temperature data of the flue gas discharged by the mixed-firing boiler at every preset time interval, and sends the concentration data of each component and the flue gas temperature data of the flue gas to the central control module 2;

[0086] The flue gas detection module 1 is used to detect the concentration of each component of the flue gas discharged from the multi-fuel mixed-firing boiler, specifically including the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration, and the temperature of the flue gas;

[0087] S2 The central control module 2 compares the concentration data of each component of the flue gas and the flue gas temperature data with the preset threshold value. If the concentration data of each component of the flue gas and the flue gas temperature data are found to be abnormal, the central control module 2 determines the corresponding adjustment instruction and sends the adjustment instruction to the instruction execution module 3;

[0088] The central control module 2 is used for administrators to preset the concentration thresholds of carbon monoxide and nitrogen oxides in the flue gas and the flue gas temperature thresholds. If the concentrations of carbon monoxide and nitrogen oxides are found to exceed the corresponding preset thresholds, the problems of the hydrogen-containing tail gas flow, the flammable liquid flow and the air flow are judged by analyzing the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and flue gas temperature in the flue gas collected by the flue gas detection module 1, and the corresponding adjustment instructions are generated and sent to the instruction execution module 3;

[0089] S3 instruction execution module 3 adjusts the flow of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instruction;

[0090] The instruction execution module 3 adjusts the flow rates of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instructions until the concentration of carbon monoxide and the concentration of nitrogen oxides in the exhaust flue gas are lower than the preset threshold values ​​and meet the environmental protection standards.

[0091] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A fuel adaptive control system for a multi-fuel mixed-firing boiler, characterized in that: It includes a smoke detection module, a central control module, a command execution module and a flow detection module; The central control module is connected to the smoke detection module; the instruction execution module is connected to the central control module; the flow detection module is connected to the central control module; The flue gas detection module is used to collect the concentration data of each component and the flue gas temperature data of the flue gas discharged by the mixed-firing boiler at every preset time interval, and send the concentration data of each component and the flue gas temperature data of the flue gas to the central control module; The central control module is used to compare and judge the concentration data of each component of the smoke and the smoke temperature data with the preset threshold value, and if it is found that the concentration data of each component of the smoke and the smoke temperature data are abnormal, determine the corresponding adjustment instruction, and send the adjustment instruction to the instruction execution module; The instruction execution module is used to adjust the flow rates of hydrogen-containing tail gas, flammable liquid and air according to the adjustment instructions; The flow detection module is used to collect the flow data of hydrogen-containing tail gas, combustible liquid and air in real time, and feed it back to the central control module in real time.

2. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 1, characterized in that: The smoke detection module includes an oxygen concentration detection unit, a carbon monoxide concentration detection unit, a nitrogen oxide concentration detection unit and a temperature detection unit; The oxygen concentration detection unit is used to collect oxygen concentration data in the flue gas discharged from the mixed-firing boiler; The carbon monoxide concentration detection unit is used to collect carbon monoxide concentration data in the flue gas discharged from the mixed-firing boiler; The nitrogen oxide concentration detection unit is used to collect nitrogen oxide concentration data in the flue gas discharged from the mixed-firing boiler; The temperature detection unit is used to collect temperature data of the flue gas discharged from the mixed-firing boiler.

3. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 2, characterized in that: The central control module includes a threshold preset unit, an instruction preset unit and a processing unit; the processing unit is connected to the threshold preset unit and the instruction preset unit respectively; The threshold value preset unit is used for the staff to preset the threshold values ​​of the oxygen concentration, carbon monoxide concentration, nitrogen oxide concentration and temperature of the flue gas discharged from the mixed-firing boiler; The instruction preset unit is used for staff to preset adjustment instructions in various abnormal situations; The processing unit is used to compare the oxygen concentration data, carbon monoxide concentration data, nitrogen oxide concentration data and temperature data of the flue gas discharged from the mixed-firing boiler received from the flue gas detection module with the preset threshold values. If an abnormality is found, the corresponding adjustment instruction is retrieved from the instruction preset unit according to the specific situation of the abnormality and sent to the instruction execution module.

4. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 3, characterized in that: The central control module further includes a communication unit, and the communication unit is connected to the processing unit; The communication unit is used to establish a communication connection with the smoke detection module, the instruction execution module and the flow detection module.

5. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 4, characterized in that: The instruction execution module includes a hydrogen-containing tail gas flow regulating unit, a flammable liquid flow regulating unit and an air flow regulating unit; The hydrogen-containing tail gas flow rate regulating unit is used to regulate the flow rate of the hydrogen-containing tail gas according to the regulation instruction; The flammable liquid flow rate regulating unit is used to regulate the flow rate of the flammable liquid according to the regulation instruction; The air flow regulating unit is used to regulate the air flow according to the regulating instruction.

6. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 5, characterized in that: The flow detection module includes a hydrogen-containing tail gas flow detection unit, a flammable liquid flow detection unit and an air flow detection unit; The hydrogen-containing tail gas flow detection unit is used to collect flow data of the hydrogen-containing tail gas; The flammable liquid flow detection unit is used to collect flow data of the flammable liquid; The air flow detection unit is used to collect air flow data.

7. A fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in claim 6, characterized in that: The multi-fuel mixed-firing boiler fuel adaptive control system further includes an optimization module; the optimization module is connected to the central control module; The optimization module is used to collect the historical collection data of the smoke detection module and the corresponding adjustment instructions determined by the central control module, establish a learning model, and deeply optimize the adjustment instructions issued by the central control module.

8. A fuel adaptive control method for a multi-fuel mixed-firing boiler, applied to a fuel adaptive control system for a multi-fuel mixed-firing boiler as claimed in any one of claims 1 to 7, characterized in that: include: The flue gas detection module collects the concentration data of each component and the temperature data of the flue gas discharged from the mixed-firing boiler at every preset time interval, and sends the concentration data of each component and the temperature data of the flue gas to the central control module; The central control module compares the concentration data of each component of the flue gas and the flue gas temperature data with the preset threshold value. If the concentration data of each component of the flue gas and the flue gas temperature data are found to be abnormal, the central control module determines the corresponding adjustment instruction and sends the adjustment instruction to the instruction execution module; The instruction execution module adjusts the flow of hydrogen-containing tail gas, combustible liquid and air according to the adjustment instructions.

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