A method for realizing efficient energy saving of a gas boiler based on electromagnetic dynamic compensation and composite magnetic field activation technology

Abstract

This invention discloses a control method for achieving high-efficiency energy saving in gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology. It relates to the field of intelligent control and energy-saving technology for gas-fired boilers. The method utilizes multi-axis vibration sensors and magnetic flux density sensors arranged on the combustion chamber, fan motor, and circulating water pump of the gas-fired boiler to collect vibration signal vectors and environmental magnetic field interference vectors in real time during boiler operation. Fast Fourier transform analysis is performed on the vibration signal vectors to construct an unbalanced characteristic vector. Based on this unbalanced characteristic vector, a reverse compensation current signal is generated through an electromagnetic dynamic compensation module, applying a composite activation magnetic field to the gas nozzles and combustion air ducts in the combustion chamber. This invention operates collaboratively through a unified multi-objective optimization framework. Electromagnetic compensation ensures sensor accuracy, which in turn ensures the accuracy of the magnetic field activation parameters. Activation improves combustion efficiency, and intelligent control ensures the system always operates at its optimal point.

Description

Technical Field

[0001] This invention mainly relates to the technical field of intelligent control and energy saving of gas-fired boilers, specifically a control method for achieving high-efficiency energy saving of gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology. Background Technology

[0002] As core equipment for industrial production and residential heating, the energy efficiency of gas-fired boilers directly affects energy consumption and operating costs. However, existing gas-fired boilers face multiple energy efficiency losses during operation: 1. Traditional gas boilers rely solely on mechanical atomization to mix gas and air, resulting in limited mixing uniformity and leading to localized oxygen deficiency or oxygen enrichment during combustion. 2. During boiler operation, mechanical vibrations from rotating equipment such as fans and pumps, as well as external 50Hz / 60Hz power frequency magnetic field interference from electrified railways and welding equipment, can cause control system malfunctions and sensor drift, indirectly causing combustion parameters to deviate from optimal values. 3. Existing energy-saving methods mainly rely on single technologies such as variable frequency speed regulation and waste heat recovery, lacking systematic multi-dimensional coordinated control, making it difficult to achieve optimal energy efficiency across the entire operating range. Summary of the Invention

[0003] Therefore, the purpose of this invention is to provide a control method for achieving high-efficiency energy saving of gas boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology, so as to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A method for controlling the energy efficiency of a gas-fired boiler based on electromagnetic dynamic compensation and composite magnetic field activation technology includes the following steps: S1: Vibration signal vectors during boiler operation are acquired in real time through multi-axis vibration sensors and magnetic flux density sensors arranged on the combustion chamber, fan motor, and circulating water pump of the gas boiler. Interference vector with environmental magnetic field ; S2: For the vibration signal vector Perform Fast Fourier Transform analysis to extract the fundamental frequency component. and its amplitude Phase Construct the unbalanced quantity feature vector ; S3: Based on the aforementioned unbalanced quantity feature vector A reverse compensation current signal is generated through the electromagnetic dynamic compensation module. To compensate for electromagnetic force satisfy: in, The electromagnetic force coefficient, To activate the magnetic field strength vector and achieve real-time cancellation of mechanical vibration and electromagnetic interference in the boiler system; S4: Apply a composite activation magnetic field to the combustion chamber gas nozzle and combustion air duct. ,in This is a static bias magnetic field. The pulsed alternating magnetic field activates the fuel-air mixture at the molecular level, thereby improving combustion efficiency. S5: Based on a multi-parameter fusion-based intelligent control strategy, it dynamically adjusts the gas flow rate according to real-time operating conditions. Combustion air volume Circulating water pump speed and fan speed This ensures that the boiler always operates within its optimal energy efficiency range.

[0005] Preferably, the Fourier transform analysis in step S2 is performed as follows: For sampled signals conduct Point Discrete Fourier Transform: ; in, For the first Vibration acceleration values ​​at each sampling point The number of sampling points. The imaginary unit; The fundamental frequency component extraction conditions are as follows: ,and ,in Sampling frequency; unbalanced eigenvector It also includes the second harmonic component. With phase It is used to correct higher-order vibration compensation.

[0006] Preferably, in step S3, the compensation current of the electromagnetic dynamic compensation module... The calculation formula is: ; in, Phase offset ensures that the compensating force is in the opposite direction to the original unbalanced force; when When this happens, the system automatically switches to mechanical balance standby mode and issues a warning signal; The electromagnetic dynamic compensation module also includes a magnetomotive force compensation stage, and the compensation ampere-turns satisfy: ; in, , The number of turns and current of the main winding. , To compensate for the number of winding turns and the compensation current, achieve zero magnetic flux operation, and eliminate the interference of current transformer measurement errors on the control system.

[0007] Preferably, in step S4, the composite activation magnetic field The parameters are set as follows: Static bias magnetic field strength: The direction is along the gas injection axis; Pulse alternating magnetic field frequency: Duty cycle ; Peak intensity of pulsed magnetic field: ; The combustion enhancement effect of the composite magnetic field was evaluated using the following activation efficiency model: ; in, The activation coefficient is related to the gas composition. This represents the residence time of the gas in the magnetic field.

[0008] Preferably, the intelligent control strategy in step S5 adopts a multi-objective optimization model, and the objective function is: ; The constraints are as follows: ; in, , , These are the weighting coefficients. To achieve the optimal gas flow rate, Power consumption Rated power The exhaust gas temperature, For ambient temperature, This refers to the flue gas dew point temperature. °C is a safety margin. This is the upper limit of the electromagnetic compensation force.

[0009] Preferably, it also includes a variable frequency speed control energy-saving submodule, wherein the circulating water pump speed With fan speed Based on load factor Dynamic adjustment: , ; in, It is the ratio of the actual gas flow rate to the estimated value, i.e., the current load factor. This is the reference load rate.

[0010] Preferably, it also includes a waste heat recovery and heat exchange optimization submodule, which recovers the latent heat of vaporization of water vapor in the flue gas by installing a condensing heat exchanger in the flue.

[0011] Preferably, in step S1, the magnetic flux density sensor is also used to detect very low frequency or DC magnetic field interference. And a counteracting magnetic field is generated through reverse magnetic field compensation: ; Make the combined magnetic field inside the shield body satisfy: ;in ; The magnetic field shielding uses a high-permeability ferromagnetic material to cover the control cabinet, and utilizes the principle of magnetic flux shunting to concentrate the magnetic lines of force around the sensitive device into the shielding material.

[0012] Preferably, it also includes a magnetomotive force self-calibration module based on the ABS system, which uses the ampere-turn balance principle to detect the compensation accuracy in real time. ; when When the compensation reaches zero magnetic flux accuracy, the magnetomotive force self-calibration module also outputs a self-diagnostic signal. When the compensation deviation exceeds 0.05%, it automatically reduces the boiler load to 80% and triggers a maintenance alarm.

[0013] In summary, this technical solution has the following main advantages: This invention extracts the fundamental frequency component of vibration in real time through FFT and generates a compensation current with opposite phase, so that the compensation electromagnetic force can accurately cancel the mechanical imbalance force, effectively eliminating hidden energy losses such as bearing friction loss, pipeline micro-leakage, and sensor drift caused by vibration. By applying a static bias magnetic field and a pulsed alternating magnetic field in synergy to the gas-air mixing zone, and through the activation efficiency model, the magnetic moment orientation of gas molecules such as CH4 is achieved and the molecular clusters are broken, thereby increasing the effective contact area between the gas and air, making the combustion more complete and uniform, and significantly reducing the heat loss of exhaust smoke, thus breaking through the physical limits of traditional mechanical atomization mixing. Attached Figure Description

[0014] Figure 1 This is a flowchart of the present invention. Detailed Implementation

[0015] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0016] Example like Figure 1As shown, 1. Vibration signal vectors during boiler operation are collected in real time by using multi-axis vibration sensors and magnetic flux density sensors arranged on the combustion chamber, fan motor, and circulating water pump of the gas boiler. Interference vector with environmental magnetic field ; 2. Regarding the vibration signal vector Perform Fast Fourier Transform analysis to extract the fundamental frequency component. and its amplitude Phase Construct the unbalanced quantity feature vector ; 3. Based on the unbalanced quantity eigenvector A reverse compensation current signal is generated through the electromagnetic dynamic compensation module. To compensate for electromagnetic force satisfy: in, The electromagnetic force coefficient, To activate the magnetic field strength vector and achieve real-time cancellation of mechanical vibration and electromagnetic interference in the boiler system; 4. Apply a composite activation magnetic field to the combustion chamber gas nozzle and combustion air duct. ,in This is a static bias magnetic field. The pulsed alternating magnetic field activates the fuel-air mixture at the molecular level, thereby improving combustion efficiency. 5. Based on a multi-parameter fusion-based intelligent control strategy, the gas flow rate is dynamically adjusted according to real-time operating conditions. Combustion air volume Circulating water pump speed and fan speed This ensures that the boiler always operates within its optimal energy efficiency range.

[0017] It should be noted that the specific process of Fourier transform analysis is as follows: For sampled signals conduct Point Discrete Fourier Transform: ; in, For the first Vibration acceleration values ​​at each sampling point The number of sampling points. The imaginary unit; The fundamental frequency component extraction conditions are as follows: ,and ,in Sampling frequency; unbalanced eigenvector It also includes the second harmonic component. With phase It is used to correct higher-order vibration compensation.

[0018] Compensation current of electromagnetic dynamic compensation module The calculation formula is: ; in, Phase offset ensures that the compensating force is in the opposite direction to the original unbalanced force; when When this happens, the system automatically switches to mechanical balance standby mode and issues a warning signal; The electromagnetic dynamic compensation module also includes a magnetomotive force compensation stage, with the compensation ampere-turns satisfying the following: ; in, , The number of turns and current of the main winding. , To compensate for the number of winding turns and the compensation current, achieve zero magnetic flux operation, and eliminate the interference of current transformer measurement errors on the control system.

[0019] Composite Activation Magnetic Field The parameters are set as follows: Static bias magnetic field strength: The direction is along the gas injection axis; Pulse alternating magnetic field frequency: Duty cycle ; Peak intensity of pulsed magnetic field: ; The combustion enhancement effect of the composite magnetic field was evaluated using the following activation efficiency model: ; in, The activation coefficient is related to the gas composition. This represents the residence time of the gas in the magnetic field.

[0020] The intelligent control strategy employs a multi-objective optimization model, with the objective function being: ; The constraints are as follows: ; in, , , These are the weighting coefficients. To achieve the optimal gas flow rate, Power consumption Rated power The exhaust gas temperature, For ambient temperature, This refers to the flue gas dew point temperature. °C is a safety margin. This is the upper limit of the electromagnetic compensation force.

[0021] It also includes a variable frequency speed control energy-saving submodule, which controls the speed of the circulating water pump. With fan speed Based on load factor Dynamic adjustment: , ; in, It is the ratio of the actual gas flow rate to the estimated value, i.e., the current load factor. This is the reference load rate.

[0022] It also includes a waste heat recovery and heat exchange optimization submodule, which recovers the latent heat of vaporization of water vapor in flue gas by installing a condensing heat exchanger in the flue.

[0023] Magnetic flux density sensors are also used to detect very low frequency or DC magnetic field interference. And a counteracting magnetic field is generated through reverse magnetic field compensation: ; Make the combined magnetic field inside the shield body satisfy: ;in ; The magnetic field shielding uses a high-permeability ferromagnetic material to cover the control cabinet, and utilizes the principle of magnetic flux shunting to concentrate the magnetic lines of force around the sensitive device into the shielding material.

[0024] A magnetomotive force self-calibration module based on the ABS system is also set up to detect the compensation accuracy in real time using the ampere-turn balance principle. ; when When the compensation reaches zero magnetic flux accuracy, the magnetomotive force self-calibration module also outputs a self-diagnostic signal. When the compensation deviation exceeds 0.05%, it automatically reduces the boiler load to 80% and triggers a maintenance alarm.

[0025] The working principle of this invention is as follows: This invention draws on the principle of electrical compensation in dynamic balancing. It measures the amplitude and phase of rotor vibration using an accelerometer, extracts the fundamental frequency component using an FFT algorithm, calculates the magnitude and location of the imbalance, and generates a compensation signal in the control system that has the same amplitude but opposite phase as the original vibration signal.

[0026] The core compensation formula is: ; ; in The fundamental frequency amplitude of the vibration. For the vibration phase, Phase offset ensures that the direction of the compensation force is opposite to that of the unbalanced force; at the same time, a magnetomotive force compensation circuit is introduced, and the ampere-turn balance is used to enable the system to reach a zero magnetic flux operating state, eliminating the measurement error of the current transformer.

[0027] A composite activation magnetic field is applied to the combustion chamber gas nozzle and the combustion air duct: And construct an activation efficiency model.

[0028] A multi-objective optimization model is adopted: ; It also incorporates variable frequency speed control for energy saving.

[0029] The above embodiments are merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A control method for achieving high-efficiency energy saving in gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology, characterized in that: Includes the following steps: S1: through the multi-axis vibration sensor and the magnetic flux density sensor arranged on the combustion chamber of the gas boiler, the fan motor and the circulating water pump, real-time collection of vibration signal vectors in the operation process of the boiler and environmental magnetic field interference vectors ; S2: performing fast Fourier transform analysis on the vibration signal vector to extract the fundamental frequency component and its amplitude , phase , and construct an unbalance amount feature vector ; S3: generating a reverse compensation current signal based on the unbalance amount feature vector by the electromagnetic dynamic compensation module to make the compensation electromagnetic force satisfy: in, The electromagnetic force coefficient, To activate the magnetic field strength vector and achieve real-time cancellation of mechanical vibration and electromagnetic interference in the boiler system; S4: Apply a composite activation magnetic field to the combustion chamber gas nozzle and combustion air duct. ,in This is a static bias magnetic field. The pulsed alternating magnetic field activates the fuel-air mixture at the molecular level, thereby improving combustion efficiency. S5: Intelligent control strategy based on multi-parameter fusion, dynamically adjusting gas flow according to real-time working conditions , combustion air volume , circulating water pump speed and fan speed , so that the boiler always operates in the optimal energy efficiency range.

2. The method according to claim 1, characterized in that: The specific process of Fourier transform analysis in step S2 is as follows: to the sampled signal performing point discrete fourier transform: ； in, For the first Vibration acceleration values ​​at each sampling point The number of sampling points. The imaginary unit; The fundamental frequency component extraction conditions are as follows: ,and ,in Sampling frequency; unbalanced eigenvector It also includes the second harmonic component. With phase It is used to correct higher-order vibration compensation.

3. The control method for achieving high-efficiency energy saving of gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology according to claim 1, characterized in that: The compensation current of the electromagnetic dynamic compensation module in the step S3 The calculation formula is: ； wherein, The phase shift ensures that the compensating force is opposite to the original unbalance force direction. When the system automatically switches to the mechanical balance standby mode and sends a pre-warning signal; The electromagnetic dynamic compensation module also includes a magnetomotive force compensation stage, and the compensation ampere-turns satisfy: ； in, , The number of turns and current of the main winding. , To compensate for the number of winding turns and the compensation current, achieve zero magnetic flux operation, and eliminate the interference of current transformer measurement errors on the control system.

4. The method of claim 1, wherein the method is characterized in that: The complex activation magnetic field in the step S4 is set as: Static bias magnetic field strength: in the direction along the gas injection axis; Pulsed alternating magnetic field frequency: Duty cycle ; Pulsed magnetic field peak intensity: ; The combustion enhancement effect of the composite magnetic field was evaluated using the following activation efficiency model: ； wherein, is the activation coefficient related to the fuel gas composition, is the residence time of the fuel gas in the magnetic field.

5. The control method for achieving high-efficiency energy saving of gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology according to claim 1, characterized in that: In step S5, the intelligent control strategy adopts a multi-objective optimization model, and the objective function is: ； The constraints are as follows: ； in, , , These are the weighting coefficients. To achieve the optimal gas flow rate, Power consumption Rated power The exhaust gas temperature, For ambient temperature, This refers to the flue gas dew point temperature. °C is a safety margin. This is the upper limit of the electromagnetic compensation force.

6. The method of claim 1, wherein the method is characterized in that: Also include variable frequency speed regulation energy saving sub module, the circulating water pump rotating speed With the fan rotating speed According to the load rate Dynamic adjustment: ， ； in, It is the ratio of the actual gas flow rate to the estimated value, i.e., the current load factor. This is the reference load rate.

7. The control method for achieving high-efficiency energy saving of gas-fired boilers based on electromagnetic dynamic compensation and composite magnetic field activation technology according to claim 1, characterized in that: It also includes a waste heat recovery and heat exchange optimization submodule, which recovers the latent heat of vaporization of water vapor in flue gas by installing a condensing heat exchanger in the flue.

8. The method of claim 1, wherein the method is characterized in that: The magnetic flux density sensor in step S1 is also used to detect very low frequency or DC magnetic field disturbances and a counteracting magnetic field is generated by backfield compensation: ； The magnetic field in the shield satisfies: ; wherein ; The magnetic field shielding uses a high-permeability ferromagnetic material to cover the control cabinet, and utilizes the principle of magnetic flux shunting to concentrate the magnetic lines of force around the sensitive device into the shielding material.

9. The method of claim 1, wherein the method is characterized in that: It also includes a magnetomotive force self-calibration module based on the ABS system, which uses the ampere-turn balance principle to detect the compensation accuracy in real time. ； when When the compensation reaches zero magnetic flux accuracy, the magnetomotive force self-calibration module also outputs a self-diagnostic signal. When the compensation deviation exceeds 0.05%, it automatically reduces the boiler load to 80% and triggers a maintenance alarm.

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