Control method and system for hot air type energy-saving burner

Abstract

The application relates to a hot air type energy-saving burner control method and system. In the method, actual hot air temperature and actual hot air pressure corresponding to a burner are acquired; the actual hot air temperature and the actual hot air pressure are processed based on a preset density compensation model to obtain a density compensation coefficient; a target mass air flow of corresponding hot air is obtained according to the density compensation coefficient; the hot air input parameter and the fuel input parameter of the burner are adjusted according to the target mass air flow, and the burner is controlled to combust the hot air and the fuel according to the hot air input parameter and the fuel input parameter, so that the hot air density is corrected in real time, the hot air and the fuel can be fully combusted, the density fluctuation under the hot air combustion condition is reduced, the fuel combustion completeness is improved, the NOx and CO emissions are prevented from exceeding the standard, the energy-saving effect is improved, and the backfire and flameout safety hazards are prevented.

Description

Technical Field

[0001] This application relates to the field of burner technology, and more particularly to a control method and system for a hot air type energy-saving burner. Background Technology

[0002] In industrial heating, using hot air generated by waste heat recovery to assist combustion is the mainstream energy-saving method, which can significantly reduce fuel consumption. However, during the operation of the waste heat recovery system, the temperature and pressure of the hot air will change with the fluctuation of the upstream operating conditions, which in turn will cause the actual density of the hot air to change.

[0003] In existing burners, the hot air density correction method usually calculates the air-fuel ratio directly using volumetric flow rate. When the hot air density decreases, the actual mass of air participating in combustion is insufficient, which will cause incomplete combustion, increased carbon monoxide (CO) emissions, fuel waste, and even flameout. When the hot air density increases, the actual mass of air is excessive, which will cause a significant increase in the amount of thermal NOx generated, and will also take away a large amount of heat, reducing thermal efficiency. At the same time, there are safety hazards such as flame drift, backfire, and flameout. Summary of the Invention

[0004] The purpose of this application is to provide a control method and system for a hot air type energy-saving burner, in order to solve the problems of large density fluctuations in existing burner hot air density correction methods under hot air combustion conditions, which lead to incomplete fuel combustion, excessive NOx and CO emissions, reduced energy-saving effect, and backfire and flameout safety hazards.

[0005] In a first aspect, this application provides a control method for a hot-air type energy-saving burner, applied to a burner control system. The burner control system includes a controller and a burner, the burner being used to burn incoming hot air and fuel, and the controller being connected to the burner. The method includes: Obtain the actual hot air temperature and actual hot air pressure of the corresponding burner; Based on the preset density compensation model, the actual hot air temperature and actual hot air pressure are processed to obtain the density compensation coefficient. Based on the density compensation coefficient, the target mass air volume of the corresponding hot air is obtained; Based on the target air volume, adjust the hot air input parameters and fuel input parameters of the burner, and control the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters.

[0006] In one embodiment, the preset density compensation model is: in, This is the density compensation coefficient. This is the standard density of dry air. Standard atmospheric pressure It is 273.15K. The actual hot air pressure, This is the actual hot air temperature.

[0007] In one embodiment, the step of obtaining the target mass air volume of the corresponding hot air based on the density compensation coefficient includes: The actual hot air density is obtained based on the density compensation coefficient and the standard density of dry air. Obtain the standard volumetric flow rate of the corresponding hot air, and process the standard volumetric flow rate and the actual hot air density based on the preset air volume correction model to obtain the target mass air volume.

[0008] In one embodiment, the preset airflow correction model is: in, For target quality air volume, This is the standard volumetric flow rate value. This represents the actual hot air density.

[0009] In one embodiment, the step of adjusting the hot air input parameters of the burner according to the target mass air volume includes: Obtain the actual mass air volume of the corresponding hot air; The air volume deviation value is obtained based on the target quality air volume and the actual quality air volume; Adjust the hot air input parameters of the burner when the air volume deviation value meets the preset conditions.

[0010] In one embodiment, the step of adjusting the hot air input parameters of the burner when the air volume deviation value meets a preset condition includes: When the air volume deviation exceeds the preset threshold range, adjust the burner's fan frequency parameter; When the frequency value of the fan frequency parameter reaches the preset frequency limit and the air volume deviation value exceeds the preset threshold range, adjust the damper opening parameter of the burner.

[0011] In one embodiment, the step of adjusting the burner's fuel input parameters according to the target mass air volume includes: Based on a preset fuel volume model, the target mass air volume is processed to obtain the target fuel volume; Adjust the burner's fuel valve opening parameters according to the target fuel volume.

[0012] In one embodiment, the preset fuel volume model is: in, For the target fuel volume, For target quality air volume, To preset the mass air-fuel ratio, This is the equivalent fuel density.

[0013] In one embodiment, after obtaining the actual hot air temperature and actual hot air pressure of the corresponding burner, the method includes: When the actual hot air temperature exceeds the preset temperature threshold or the actual hot air pressure exceeds the preset pressure threshold, the burner is controlled to stop working.

[0014] Secondly, this application also provides a hot air type energy-saving burner control device, comprising: The data acquisition module is used to acquire the actual hot air temperature and actual hot air pressure of the corresponding burner; The compensation coefficient calculation module is used to process the actual hot air temperature and actual hot air pressure based on the preset density compensation model to obtain the density compensation coefficient. The compensation coefficient processing module is used to obtain the target mass air volume of the corresponding hot air based on the density compensation coefficient. The parameter adjustment module is used to adjust the hot air input parameters and fuel input parameters of the burner according to the target air volume, and to control the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters.

[0015] Thirdly, this application also provides a burner control system, including a controller and a burner, wherein the burner is used to burn incoming hot air and fuel, and the controller is connected to the burner; The controller is used to execute the steps of any of the above-described hot air type energy-saving burner control methods.

[0016] One of the above technical solutions has the following advantages and beneficial effects: The aforementioned hot-air type energy-saving burner control method is applied to a burner control system, which includes a controller and a burner. The burner is used to burn incoming hot air and fuel, and the controller is connected to the burner. The method acquires the actual hot air temperature and pressure of the corresponding burner. Based on a preset density compensation model, the actual hot air temperature and pressure are processed to obtain a density compensation coefficient. Based on the density compensation coefficient, the target mass airflow of the corresponding hot air is obtained. Based on the target mass airflow, the hot air input parameters and fuel input parameters of the burner are adjusted, and the burner is controlled to burn the hot air and fuel according to these parameters, achieving real-time correction of hot air density and improving the safety and stability of fuel combustion. This application calculates the density compensation coefficient based on the hot air temperature and pressure, and calculates the target mass airflow of the corresponding hot air based on the density compensation coefficient. Then, the corresponding input parameters of the burner are adjusted according to the target mass airflow, enabling the hot air and fuel to burn completely, reducing density fluctuations under hot-air combustion conditions, improving fuel combustion completeness, avoiding excessive NOx and CO emissions, demonstrating energy-saving effects, and preventing backfire and flameout safety hazards. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the burner control system in an embodiment of this application; Figure 2 This is a flowchart illustrating the control method for a hot air type energy-saving burner in an embodiment of this application; Figure 3 This is a flowchart illustrating the steps for calculating the target mass air volume in an embodiment of this application. Figure 4 This is a flowchart illustrating the hot air input parameter adjustment steps in an embodiment of this application. Figure 5 This is a flowchart illustrating the fuel input parameter adjustment steps in an embodiment of this application. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0019] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] In addition, the term "multiple" should mean two or more.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] The hot air type energy-saving burner control method provided in this application can be applied to, for example... Figure 1 The application environment is shown. The burner control system includes a controller 10 and a burner 20. The burner 20 is used to combust incoming hot air and fuel. The controller 10 is connected to the burner 20. The hot air can be generated by waste heat recovery; the fuel can be a single-component fuel or a mixed fuel. The mixed fuel has at least two different single-component fuels. The burner 20 is equipped with a furnace. Fuel and hot air are transported to the furnace through corresponding transmission pipes. The hot air in the furnace mixes with the fuel, aiding in combustion. For example, the corresponding transmission pipes are equipped with a fuel regulating valve and an air damper regulating valve. The fuel regulating valve is used to regulate the fuel output flow rate; the air damper regulating valve is used to regulate the air volume and pressure of the hot air transmission. The burner 20 is also equipped with an air distribution system, which may include a fan, an air damper actuator, an air regulator (such as a swirl vane or diffuser), and an air duct housing. The air distribution system determines the air-fuel ratio and mixing effect. The burner 20 is also equipped with an ignition system, which is used to generate an initial spark to ignite the mixture. The ignition system can be composed of a high-voltage ignition transformer, an ignition electrode, and a high-voltage wire.

[0023] For example, the fuel can be gaseous, liquid, or solid. Gaseous fuels can be blast furnace gas, coke oven gas, natural gas, or converter gas (containing combustible components such as CO, H2, and CH4). Liquid fuels can include heavy oil, waste mineral oil, or waste solvents. Solid fuels can include bituminous coal, anthracite, biomass pellets, or dried sludge fuel.

[0024] The controller 10 may include a processing unit and a storage unit. The storage unit is connected to the processing unit and is used to store data such as actual hot air temperature, actual hot air pressure, preset density compensation model, density compensation coefficient, target mass airflow, hot air input parameters, and fuel input parameters. The processing unit is used to acquire the actual hot air temperature and actual hot air pressure of the corresponding burner 20; based on the preset density compensation model, it processes the actual hot air temperature and actual hot air pressure to obtain the density compensation coefficient; based on the density compensation coefficient, it obtains the target mass airflow of the corresponding hot air; based on the target mass airflow, it adjusts the hot air input parameters and fuel input parameters of the burner 20, and controls the burner to burn the hot air and fuel based on the hot air input parameters and fuel input parameters. In one example, the controller 10 also includes a display unit connected to the processing unit. The display unit can be used to display data such as actual hot air temperature, actual hot air pressure, density compensation coefficient, target mass airflow, hot air input parameters, and fuel input parameters.

[0025] In one embodiment, such as Figure 2 As shown, a control method for a hot air type energy-saving burner is also provided, applicable to, for example... Figure 1 The burner control system shown includes the following control methods for hot air type energy-saving burners: Step S210: Obtain the actual hot air temperature and actual hot air pressure of the corresponding burner.

[0026] For example, the burner is equipped with a temperature detector and a pressure detector, which are connected to the controller. The temperature detector is used to detect the actual hot air temperature of the corresponding burner and transmit the detected actual hot air temperature to the controller; the pressure detector is used to detect the actual hot air pressure of the corresponding burner and transmit the detected actual hot air pressure to the controller, so that the controller can obtain the corresponding actual hot air temperature and actual hot air pressure.

[0027] For example, before obtaining the actual hot air temperature and actual hot air pressure of the corresponding burner, the burner control system is powered on and initialized, and preset calibration air density, standard air-fuel ratio, and safety boundary parameters can be read. After initialization, ignition is initiated, and the temperature and pressure detectors are powered on, enabling the temperature detector to monitor the actual hot air temperature of the corresponding burner in real time, and the pressure detector to monitor the actual hot air pressure of the corresponding burner. It should be noted that the safety boundary parameters may include the upper limit of hot air temperature (e.g., set to 300℃), the lower limit of hot air temperature (e.g., set to 80℃), the upper limit of mass air-fuel ratio λ (e.g., set to 1.3), the lower limit of mass air-fuel ratio λ (e.g., set to 0.5), the burner back pressure over-limit, the fan current overload threshold, and the CO (carbon monoxide) over-limit (e.g., >200ppm for 2 seconds trigger).

[0028] Step S220: Based on the preset density compensation model, process the actual hot air temperature and actual hot air pressure to obtain the density compensation coefficient.

[0029] The preset density compensation model can be obtained by real-time density calculation based on the ideal gas law.

[0030] For example, the controller can acquire the actual hot air temperature and actual hot air pressure based on a preset period, and input the acquired actual hot air temperature and actual hot air pressure into a preset density compensation model for processing, thereby outputting a density compensation system. In one example, the controller can acquire the actual hot air temperature and actual hot air pressure every 100ms, that is, perform a density compensation coefficient calculation every 100ms to obtain the current density compensation coefficient.

[0031] In one example, in step S220, the preset density compensation model is: .

[0032] in, This is the density compensation coefficient. This is the standard density of dry air. Standard atmospheric pressure It is 273.15K. The actual hot air pressure, This is the actual hot air temperature. It should be noted that... A possible value is 1.293 kg / Nm³. 3 , The possible value is 101.325 kPa.

[0033] Step S230: Obtain the target mass air volume of the corresponding hot air based on the density compensation coefficient.

[0034] For example, the controller may include an outer loop control unit, an inner loop control unit, and a fuel control unit; the outer loop control unit is connected to the inner loop control unit and the fuel control unit. The outer loop control unit may correct the mass airflow of the hot air based on a density compensation coefficient to obtain the target mass airflow of the corresponding hot air, and transmit the target mass airflow to the inner loop control unit and the fuel control unit.

[0035] Step S240: Adjust the hot air input parameters and fuel input parameters of the burner according to the target mass air volume, and control the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters.

[0036] For example, the inner loop control unit is equipped with an airflow PID regulation loop. This loop processes the target mass airflow to adjust the burner's hot air input parameters, ensuring that the actual mass airflow of the corresponding hot air remains stable at the target mass airflow. The fuel control unit is equipped with a fuel PID regulation loop. This loop processes the target mass airflow to adjust the burner's fuel input parameters, ensuring the mass air-fuel ratio is always maintained at a preset value. This prevents density fluctuations from causing the air-fuel ratio to deviate. Furthermore, based on the adjusted hot air and fuel input parameters, the transmission of hot air and fuel is adjusted to control the burner's combustion of hot air and fuel, achieving real-time correction of hot air density and improving the burner's combustion stability and safety.

[0037] In the above embodiments, the actual hot air temperature and pressure of the corresponding burner are obtained; based on a preset density compensation model, the actual hot air temperature and pressure are processed to obtain a density compensation coefficient; based on the density compensation coefficient, the target mass air volume of the corresponding hot air is obtained; based on the target mass air volume, the hot air input parameters and fuel input parameters of the burner are adjusted, and the burner is controlled to burn the hot air and fuel according to the hot air input parameters and fuel input parameters, so as to realize real-time correction of hot air density and improve the safety and stability of fuel combustion. This application calculates the density compensation coefficient based on the hot air temperature and pressure, and calculates the target mass air volume of the corresponding hot air based on the density compensation coefficient, and then adjusts the corresponding input parameters of the burner according to the target mass air volume, so that the hot air and fuel can be fully burned, reducing density fluctuations under hot air combustion conditions, improving fuel combustion completeness, avoiding excessive NOx (nitrogen oxides) and CO emissions, indicating energy-saving effects and preventing backfire and flameout safety hazards; in addition, it eliminates the need to use the existing low-NOx structure with built-in dual injection in the cyclone blades, reducing the processing and maintenance difficulty of the system.

[0038] In one embodiment, such as Figure 3 As shown, the steps for obtaining the target mass airflow of the corresponding hot air based on the density compensation coefficient include: Step S310: Obtain the actual hot air density based on the density compensation coefficient and the standard density of dry air.

[0039] Among them, actual hot air density . This is the density compensation coefficient. This is the standard density of dry air.

[0040] The actual hot air density is obtained by multiplying the density compensation coefficient and the standard dry air density.

[0041] Step S320: Obtain the standard volumetric flow rate value of the corresponding hot air, and process the standard volumetric flow rate value and the actual hot air density based on the preset air volume correction model to obtain the target mass air volume.

[0042] Among them, the standard condition volumetric flow rate value is the volumetric flow rate value of the hot air obtained under standard operating conditions.

[0043] In one example, the preset airflow correction model is: in, For target quality air volume, This is the standard volumetric flow rate value. This represents the actual hot air density.

[0044] By inputting the standard volumetric flow rate and the actual hot air density into a preset air volume correction model for processing, the target mass air volume of the corresponding hot air can be obtained.

[0045] In one embodiment, such as Figure 4 As shown, the steps for adjusting the burner's hot air input parameters according to the target air volume include: Step S410: Obtain the actual mass air volume of the corresponding hot air.

[0046] For example, the burner is also equipped with an air volume detector, which is connected to the controller. The air volume detector is used to detect the actual mass air volume of the corresponding burner and transmits the detected actual mass air volume to the controller, so that the controller can obtain the corresponding actual mass air volume.

[0047] Step S420: Obtain the air volume deviation value based on the target mass air volume and the actual mass air volume.

[0048] For example, the difference between the target quality air volume and the actual quality air volume is processed to obtain the air volume deviation value.

[0049] Step S430: When the air volume deviation value meets the preset conditions, adjust the hot air input parameters of the burner.

[0050] Determine whether the air volume deviation value meets the preset conditions. If the air volume deviation value meets the preset conditions, adjust the hot air input parameters of the burner to stabilize the actual hot air mass flow rate at the corrected mass air volume.

[0051] For example, the air volume deviation value can be determined based on a preset period (e.g., 50~200ms) to determine whether the preset conditions are met, and the hot air input parameters of the burner can be adjusted when the preset conditions are met.

[0052] In one embodiment, the step of adjusting the hot air input parameters of the burner when the air volume deviation value meets a preset condition includes: When the air volume deviation exceeds the preset threshold range, adjust the burner's fan frequency parameter; when the fan frequency parameter reaches the preset frequency limit and the air volume deviation exceeds the preset threshold range, adjust the burner's damper opening parameter.

[0053] The preset threshold range can be set by the system. The preset frequency limit can include a preset lower frequency limit and a preset upper frequency limit. For example, the preset lower frequency limit can be set to 0, and the preset upper frequency limit can be set to 50Hz. The adjustment range of the damper opening parameter can be set to 0-100%.

[0054] By comparing the airflow deviation value with a preset threshold range, if the airflow deviation value exceeds the preset threshold range, the fan frequency parameter of the burner is adjusted. If the frequency value of the fan frequency parameter reaches the preset frequency limit, but the airflow deviation value still exceeds the preset threshold range, the damper opening parameter of the burner is further adjusted to stabilize the actual hot air mass flow rate at the corrected mass airflow rate, thereby reducing density fluctuations under hot air combustion conditions and improving fuel combustion completeness.

[0055] In one embodiment, such as Figure 5 As shown, the steps for adjusting the burner's fuel input parameters according to the target mass air volume include: Step S510: Based on the preset fuel volume model, process the target mass air volume to obtain the target fuel volume.

[0056] In one example, the preset fuel volume model is: in, For the target fuel volume, For target quality air volume, To preset the mass air-fuel ratio, This is the equivalent fuel density.

[0057] The target mass air volume is obtained by inputting it into a preset fuel volume model and processing it.

[0058] Step S520: Adjust the fuel valve opening parameter of the burner according to the target fuel volume.

[0059] Based on the target fuel volume, the fuel valve opening parameter of the burner is adjusted, and based on the adjusted fuel valve opening parameter, the fuel valve opening is adjusted to ensure that the fuel and hot air can burn completely, ensuring that the mass air-fuel ratio is always maintained at the preset value, avoiding density fluctuations that cause the air-fuel ratio to deviate, avoiding excessive NOx and CO emissions, improving energy-saving effect, and preventing backfire and flameout safety hazards.

[0060] In one embodiment, after obtaining the actual hot air temperature and actual hot air pressure of the corresponding burner, the following steps are included: When the actual hot air temperature exceeds the preset temperature threshold or the actual hot air pressure exceeds the preset pressure threshold, the burner is controlled to stop working.

[0061] The preset temperature threshold and preset pressure threshold can be obtained by system preset. By comparing the actual hot air temperature with the preset temperature threshold and the actual hot air pressure with the preset pressure threshold, if the actual hot air temperature exceeds the preset temperature threshold or the actual hot air pressure exceeds the preset pressure threshold, it is determined that the burner has malfunctioned, thereby triggering the safety protection mechanism to control the burner to stop working, so as to ensure combustion safety.

[0062] For example, the controller may also include a safety control unit, which may be equipped with a watchdog circuit. The safety control unit performs safety boundary checks on parameters such as the current actual hot air temperature, actual hot air pressure, and flameout signal at preset intervals (e.g., 50ms). If any parameter value exceeds the corresponding preset safety range, the fuel regulating valve is shut off, and the blower is delayed for a preset purging time (e.g., 10 minutes), thereby further improving combustion safety. It should be noted that the flameout signal can be detected by a UV (ultraviolet) detector.

[0063] In one example, upon receiving a shutdown command, the fuel supply is first cut off, the blower continues to purge for a preset time (e.g., 10 minutes) before shutting down, thus completing the entire operation process and improving the burner's safety.

[0064] It should be understood that, although Figures 2 to 5 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 2 to 5 At least some of the steps in the process may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0065] In one embodiment, this application also provides a hot air type energy-saving burner control device, comprising: The data acquisition module is used to obtain the actual hot air temperature and actual hot air pressure of the corresponding burner.

[0066] The compensation coefficient calculation module is used to process the actual hot air temperature and actual hot air pressure based on a preset density compensation model to obtain the density compensation coefficient.

[0067] The compensation coefficient processing module is used to obtain the target mass air volume of the corresponding hot air based on the density compensation coefficient.

[0068] The parameter adjustment module is used to adjust the hot air input parameters and fuel input parameters of the burner according to the target air volume, and to control the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters.

[0069] Specific limitations regarding the control device for hot-air type energy-saving burners can be found in the limitations of the control method for hot-air type energy-saving burners mentioned above, and will not be repeated here. Each module in the aforementioned hot-air type energy-saving burner control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware within or independently of the processing unit in the burner control system, or stored in software within the storage unit of the burner control system, so that the processing unit can call and execute the corresponding operations of each module.

[0070] In one embodiment, such as Figure 1 As shown, this application also provides a burner control system, including a controller and a burner, wherein the burner is used to burn incoming hot air and fuel, and the controller is connected to the burner; the controller is used to execute the steps of the hot air type energy-saving burner control method described above.

[0071] The specific descriptions of the controller 10 and the burner 20 can be found in the descriptions of the controller 10 and the burner 20 in the above embodiments, and will not be repeated here.

[0072] Based on the controller 10 connected to the burner 20, the controller 10 obtains the actual hot air temperature and actual hot air pressure of the corresponding burner; based on the preset density compensation model, it processes the actual hot air temperature and actual hot air pressure to obtain the density compensation coefficient; based on the density compensation coefficient, it obtains the target mass air volume of the corresponding hot air; based on the target mass air volume, it adjusts the hot air input parameters and fuel input parameters of the burner, and controls the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters, so as to realize real-time correction of hot air density and improve the safety and stability of fuel combustion.

[0073] In the above embodiments, the controller 10 calculates the density compensation coefficient based on the hot air temperature and hot air pressure, and calculates the target mass air volume of the corresponding hot air based on the density compensation coefficient. Then, it adjusts the corresponding input parameters of the burner based on the target mass air volume, so that the hot air and fuel can be fully combusted, reduce density fluctuations under hot air combustion conditions, improve fuel combustion completeness, avoid excessive NOx and CO emissions, enhance energy-saving effects, and prevent backfire and flameout safety hazards.

[0074] In one embodiment, a computer storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements the steps of the hot air type energy-saving burner control method described above.

[0075] For example, when a computer program is executed by a processor, it performs the following steps: The system obtains the actual hot air temperature and pressure of the corresponding burner; based on a preset density compensation model, it processes the actual hot air temperature and pressure to obtain a density compensation coefficient; based on the density compensation coefficient, it obtains the target mass air volume of the corresponding hot air; based on the target mass air volume, it adjusts the hot air input parameters and fuel input parameters of the burner, and controls the burner to burn the hot air and fuel according to the hot air input parameters and fuel input parameters, thereby achieving real-time correction of hot air density and improving the safety and stability of fuel combustion.

[0076] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the embodiments of the division operations described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), direct memory bus RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A control method for a hot air type energy-saving burner, characterized in that it is applied to a burner control system, the burner control system including a controller and a burner, the burner being used to burn incoming hot air and fuel, the controller being connected to the burner, the method comprising: Obtain the actual hot air temperature and actual hot air pressure corresponding to the burner; Based on a preset density compensation model, the actual hot air temperature and the actual hot air pressure are processed to obtain a density compensation coefficient. Based on the density compensation coefficient, the target mass air volume corresponding to the hot air is obtained; Based on the target mass air volume, the hot air input parameters and fuel input parameters of the burner are adjusted, and based on the hot air input parameters and fuel input parameters, the burner is controlled to burn the hot air and the fuel.

2. The hot air type energy-saving burner control method according to claim 1, characterized in that, The preset density compensation model is as follows: in, The density compensation coefficient is... This is the standard density of dry air. Standard atmospheric pressure It is 273.15K. The actual hot air pressure, The actual hot air temperature is [value].

3. The hot air type energy-saving burner control method according to claim 2, characterized in that, The step of obtaining the target mass air volume corresponding to the hot air based on the density compensation coefficient includes: The actual hot air density is obtained based on the density compensation coefficient and the standard dry air density. Obtain the standard volumetric flow rate value corresponding to the hot air, and process the standard volumetric flow rate value and the actual hot air density based on the preset air volume correction model to obtain the target mass air volume.

4. The hot air type energy-saving burner control method according to claim 3, characterized in that, The preset airflow correction model is: in, The target mass air volume. This is the standard volumetric flow rate value. The actual hot air density is given.

5. The hot air type energy-saving burner control method according to claim 1, characterized in that, The step of adjusting the hot air input parameters of the burner according to the target mass air volume includes: Obtain the actual mass air volume corresponding to the hot air; Based on the target mass air volume and the actual mass air volume, the air volume deviation value is obtained; When the air volume deviation value meets the preset conditions, the hot air input parameters of the burner are adjusted.

6. The hot air type energy-saving burner control method according to claim 5, characterized in that, The step of adjusting the hot air input parameters of the burner when the air volume deviation value meets the preset conditions includes: When the air volume deviation exceeds a preset threshold range, the fan frequency parameter of the burner is adjusted. When the frequency value of the fan frequency parameter reaches the preset frequency limit and the air volume deviation value exceeds the preset threshold range, the damper opening parameter of the burner is adjusted.

7. The hot air type energy-saving burner control method according to claim 1, characterized in that, The step of adjusting the fuel input parameters of the burner according to the target mass air volume includes: Based on a preset fuel volume model, the target mass air volume is processed to obtain the target fuel volume; Adjust the fuel valve opening parameter of the burner according to the target fuel volume.

8. The hot air type energy-saving burner control method according to claim 7, characterized in that, The preset fuel volume model is: in, The target fuel volume, The target mass air volume. To preset the mass air-fuel ratio, This is the equivalent fuel density.

9. The hot air type energy-saving burner control method according to claim 1, characterized in that, After the step of obtaining the actual hot air temperature and actual hot air pressure corresponding to the burner, the following steps are included: When the actual hot air temperature exceeds a preset temperature threshold or the actual hot air pressure exceeds a preset pressure threshold, the burner is controlled to stop working.

10. A burner control system, characterized in that, It includes a controller and a burner, the burner being used to burn incoming hot air and fuel, and the controller being connected to the burner; The controller is used to perform the steps of the hot air type energy-saving burner control method according to any one of claims 1 to 9.

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