A porous medium burner for controlling high gas flow rate based on a constant pressure tank and its working method

Abstract

The present invention discloses a porous medium burner for controlling high gas flow rate based on a constant pressure tank and a working method thereof, belonging to the field of porous medium burners. It includes a constant pressure tank body and a porous medium burner body. A buffer chamber is arranged inside the constant pressure tank body, and a voltage stabilizing component is arranged inside the buffer chamber. The air inlet end of the buffer chamber is communicated with a gas mixer through a gas filter, and the air outlet end of the buffer chamber is communicated with the air inlet end of the porous medium burner body through an air outlet pipe. A flow stabilizing component is arranged on the air outlet pipe. By adopting the above-mentioned porous medium burner for controlling high gas flow rate based on a constant pressure tank and the working method thereof, through the coordinated work of the constant pressure tank and the flow stabilizing component, precise control of the high gas flow rate can be achieved, effectively avoiding the problem of unstable combustion caused by gas flow rate fluctuations, and improving the reliability and repeatability of the combustion process.

Description

Technical Field

[0001] The present invention relates to the technical field of porous medium burners, and particularly to a porous medium burner for controlling high gas flow rate based on a constant pressure tank and a working method thereof. Background Art

[0002] Porous medium burners have attracted much attention due to their advantages such as high-efficiency combustion and low pollutant emissions, and are widely used in industrial heating, heat treatment, incineration and other fields. During their operation, the stability and precise control of gas flow rate play a crucial role in combustion stability and temperature uniformity. Traditional gas flow rate working methods, such as regulating valves, proportional valves, etc., often have difficulty meeting the requirements of stability and precision of porous medium burners under high flow rate conditions, resulting in problems such as unstable flames and uneven temperature distribution during combustion, thereby affecting combustion efficiency and equipment life.

[0003] Specifically, when the gas flow rate fluctuates greatly, it will lead to insufficient mixing of fuel and air, forming local over-rich or over-lean regions, thus causing phenomena such as flameout, flashback or incomplete combustion. These problems not only reduce combustion efficiency, but also may increase the emission of harmful pollutants, causing adverse effects on the environment and human health. In addition, the uneven temperature distribution will also accelerate the thermal fatigue and material aging of burner components, shorten the equipment service life and increase the maintenance cost.

[0004] To solve the above problems, researchers and engineers have been exploring more advanced gas flow rate control technologies. As a device that can stabilize gas pressure and flow rate, the constant pressure tank has potential advantages and broad application prospects. The constant pressure tank ensures the stability of gas flow rate by maintaining a constant pressure. Especially under high flow rate conditions, it can effectively reduce air flow pulsation and pressure fluctuation, and improve the stability and reliability of the combustion process. However, there is currently no mature technical solution for combining the constant pressure tank with the porous medium burner. The main reasons are as follows:

[0005] 1. Difficult system integration: The combination of the constant pressure tank and the porous medium burner needs to solve problems such as interface design and control system compatibility between the two.

[0006] 2. Slow dynamic response: Although the constant pressure tank can stabilize gas pressure, its dynamic response speed may not be able to keep up with the actual needs under rapidly changing working conditions.

[0007] 3. High cost: Introducing the constant pressure tank will increase the complexity and cost of the system, and it is necessary to weigh the performance improvement and economic benefits brought by it. Summary of the Invention

[0008] The object of the present invention is to provide a porous medium burner for controlling high gas flow rate based on a constant pressure tank and a working method thereof to solve the above technical problems.

[0009] To achieve the above object, the present invention provides a porous medium burner for controlling high gas flow rate based on a constant pressure tank, which includes a constant pressure tank body and a porous medium burner body. A buffer chamber is provided inside the constant pressure tank body, and a pressure stabilizing component is arranged inside the buffer chamber. The intake end of the buffer chamber is communicated with a gas mixer through a gas filter, and the outlet end of the buffer chamber is communicated with the intake end of the porous medium burner body through an outlet pipeline. A flow stabilizing component is arranged on the outlet pipeline.

[0010] Preferably, the pressure stabilizing component includes a pressure sensor and a pressure regulating valve. The pressure sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the pressure regulating valve, which is used to adjust the opening degree of the pressure regulating valve according to the result of comparing the internal pressure of the buffer chamber collected by the pressure sensor with a preset pressure range, so as to control the internal pressure of the buffer chamber within the preset pressure range.

[0011] Preferably, the flow stabilizing component includes a flow regulating valve and a flow velocity sensor arranged in sequence on the outlet pipeline. The flow velocity sensor is electrically connected to the input end of the controller, and the output end of the controller is electrically connected to the flow regulating valve, which is used to adjust the opening degree of the flow regulating valve according to the result of comparing the input flow velocity of the porous medium burner body collected by the flow velocity sensor with a preset flow velocity range, so as to control the input flow velocity of the porous medium burner body within the preset flow velocity range.

[0012] Preferably, the porous medium burner body includes a housing, a combustion chamber and an air outlet channel opened inside the housing, and a porous medium filled between the combustion chamber and the air outlet channel. The porous medium is a layered structure, and the porous medium includes a bottom layer medium, a middle layer medium and a top layer medium arranged in sequence from the combustion chamber to the air outlet channel, and the pore diameters and porosities of the bottom layer medium, the middle layer medium and the top layer medium decrease in sequence.

[0013] Preferably, a heat insulation layer is arranged on the inner wall of the housing, and a circulating cooling channel is arranged on the outer wall of the housing. A cooling medium is filled in the circulating cooling channel, and the cooling medium is cooling water or cooling air.

[0014] Preferably, the porous medium is made of porous foam ceramics, the housing is made of ceramic fiber, and the constant pressure tank body is made of stainless steel.

[0015] Preferably, a plurality of temperature sensors are uniformly arranged axially on the air outlet channel, an emission monitor is arranged at the output end of the air outlet channel, and a flame monitor and a temperature sensor are arranged in the combustion chamber. The temperature sensor, the flame monitor and the emission monitor are all electrically connected to the controller.

[0016] The working method of the porous medium burner for controlling high gas flow rate based on a constant pressure tank includes the following steps:

[0017] S1. Installation and commissioning;

[0018] S11. Assembly: Connect the porous medium burner body and the constant pressure tank body using the gas outlet pipe, and arrange the pressure stabilizing component and the flow stabilizing component;

[0019] S12. Pressure test: Conduct a sealing and pressure resistance test on the constant pressure tank body to ensure that it can stably maintain the preset pressure;

[0020] S13. Calibration: Calibrate the flow stabilizing component using a standard flowmeter to ensure the measurement and control accuracy;

[0021] S14. Linkage commissioning: Simulate different working conditions and check the collaborative working ability of each component;

[0022] S2. Start-up and operation;

[0023] Fill the constant pressure tank body with gas and adjust it to within the preset pressure, and start the pressure stabilizing component to make the gas enter the porous medium burner body at a set flow rate, ignite the fuel in the combustion chamber, and during the combustion process, use the temperature sensor, flame monitor, and emission monitor to detect the local temperature, flame, and emission gas in real time, and then adjust the flow regulating valve of the flow stabilizing component in real time according to the monitoring results, so as to adaptively adjust the flow rate of the gas entering the porous medium burner body.

[0024] The adaptive adjustment described in step S2 includes an adaptive adjustment method based on temperature and an adaptive adjustment method based on emissions;

[0025] Among them, the adaptive adjustment method based on temperature specifically includes the following steps:

[0026] The first step: Use the temperature sensor to collect the temperature data at multiple positions in the combustion chamber and perform preprocessing to obtain multiple actual temperature values;

[0027] The second step: Deviation calculation: Compare the multiple actual temperature values with the preset temperature uniform distribution target value and calculate the temperature deviation ;

[0028] The third step: Based on an improved algorithm of PID control, calculate the change amount of the gas flow rate and the change amount of the constant pressure tank pressure :

[0029] ;

[0030] ;

[0031] In the formula, , and respectively represent the proportional coefficient, integral coefficient, and differential coefficient; represents the th actual temperature value; represents the number of actual temperature values; represents the temperature deviation of the previous calculation; represents a function with the change in gas flow rate as the input and the change in the pressure of the constant pressure tank as the output;

[0032] Step 4: Based on the change in gas flow rate and the change in the pressure of the constant pressure tank determine the opening value of the flow control valve :

[0033] ;

[0034] In the formula, represents the th change in gas flow rate; represents the change in gas flow rate of the previous calculation; represents the adjustment coefficient;

[0035] The adaptive regulation method based on emissions specifically includes the following steps:

[0036] Step 1: Based on the comprehensive emission over-standard multiple formulate the regulation level of the gas flow rate and the opening value of the flow control valve;

[0037] Step 2: Use the emission monitor to continuously monitor multiple types of emission gases, and compare the concentration of each type of emission gas with the environmental protection standard value of the corresponding type to calculate the emission over-standard multiple of each type of gas :

[0038] ;

[0039] Step 3: Calculate the comprehensive emission over-standard multiple :

[0040] ;

[0041] In the formula, are all weight coefficients;

[0042] Step 4: Compare and determine the opening value of the flow control valve corresponding to the comprehensive emission over-standard multiple .

[0043] Therefore, the porous medium burner and the working method for controlling high gas flow rate based on a constant pressure tank of the present invention have the following beneficial effects:

[0044] 1. Precise control of high gas flow rate: Through the coordinated operation of a constant pressure tank and a flow stabilizing component, precise control of high gas flow rate is achieved. Specifically, the constant pressure tank provides a stable pressure source, and the flow stabilizing component makes precise adjustments based on real-time data to ensure that the gas flow rate always remains within the preset range, avoiding unstable combustion and improving combustion reliability and repeatability.

[0045] 2. Improve combustion stability and efficiency: The stable high flow rate enables the full mixing of fuel and air in the porous medium, improving combustion efficiency. At the same time, the flow rate can be adjusted in real time according to the working conditions to ensure a stable flame, reduce flameout and flashback phenomena, and lower energy consumption and operating costs.

[0046] 3. Improve the uniformity of temperature distribution: The combination of the layered structure of the porous medium and the stable gas flow rate controlled by the constant pressure tank makes the heat more evenly distributed in the burner, avoiding local overheating or overcooling, improving temperature uniformity, and being beneficial to enhancing product quality and extending equipment life.

[0047] 4. Reduce pollutant emissions: The precisely controlled high flow rate and the optimized combustion process promote the complete combustion of fuel, reduce the generation of incomplete combustion products (such as CO), and at the same time reduce the emissions of pollutants such as nitrogen oxides (NOx), meeting environmental protection requirements and having good environmental benefits.

[0048] In summary, the porous medium burner described in the present invention has the advantages of high efficiency, stability, uniformity, and environmental protection.

[0049] The technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a schematic diagram of the overall structure of a porous medium burner for controlling high gas flow rate based on a constant pressure tank according to the present invention;

[0051] Figure 2 is an axial sectional view of the porous medium burner body of a porous medium burner for controlling high gas flow rate based on a constant pressure tank according to the present invention;

[0052] Figure 3 is a control block diagram of a porous medium burner for controlling high gas flow rate based on a constant pressure tank according to the present invention.

[0053] REFERENCE NUMERALS

[0054] 1. Constant pressure tank body; 2. Outlet pipeline; 3. Flow stabilizing component; 4. Porous medium burner body; 41. Combustion chamber; 42. Bottom layer medium; 43. Middle layer medium; 44. Top layer medium; 45. Heat insulation layer; 46. Outlet channel; 47. Circulating cooling channel; 5. Controller; 6. Emission monitor; 7. Gas mixer; 8. Temperature sensor. Detailed implementation mode

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the following further details the embodiments of the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by this application. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0056] It should be noted that the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or server that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0057] The following further details the embodiments of the present invention in conjunction with the drawings.

[0058] As Figures 1 - 3 shown, a porous medium burner for controlling high gas flow rate based on a constant pressure tank includes a constant pressure tank body 1 and a porous medium burner body 4. A buffer chamber is provided in the constant pressure tank body 1, and a voltage stabilizing component is provided inside the buffer chamber. The intake end of the buffer chamber is communicated with a gas mixer 7 through a gas filter. The gas filter can effectively filter out impurities and particulate matters in the gas, prevent them from entering the constant pressure tank and the subsequent burner system, avoid clogging or damage to components such as valves, pipelines and porous media, and ensure the normal operation and long-term stability of the system. The outlet end of the buffer chamber is communicated with the intake end of the porous medium burner body 4 through an outlet pipeline 2, and a flow stabilizing component 3 is provided on the outlet pipeline 2.

[0059] The outlet pipeline in this embodiment adopts a variable diameter pipeline designed as follows:

[0060] 1. Pipe diameter calculation based on the hydrodynamic model: Use CFD software to simulate gas flow. According to the input gas physical properties (density, viscosity), flow rate range, working pressure of the porous medium burner and other parameters, combined with the Reynolds number (Re) and the friction factor along the way calculate, and use the Darcy-Weisbach formula to calculate the pipe diameter:

[0061] ;

[0062] In the formula, friction head loss, is the pipe length, is the pipe diameter, is the flow velocity, is the acceleration of gravity;

[0063] Through multiple iterative calculations, the optimal pipe diameter is obtained.

[0064] 2. Variable-diameter pipe design: According to the gas flow characteristics, a larger pipe diameter is adopted at one end close to the constant-pressure tank to reduce the flow velocity and pressure loss; the pipe diameter is reduced at one end close to the porous medium burner to maintain a high flow velocity, and the length and variable-diameter slope are determined through CFD simulation to ensure smooth air flow.

[0065] 3. Pipe diameter redundancy design considering flow rate changes: Considering the gas flow rate changes during the operation of the porous medium burner, using the normal operating flow rate as the benchmark, multiplying by the flow rate fluctuation coefficient to obtain the maximum flow rate , and combining this as a constraint condition to calculate the pipe diameter, so as to meet the high flow velocity requirements during flow rate fluctuations.

[0066] At the same time, the following inner wall treatments are adopted for the outlet pipe in this embodiment:

[0067] 1. Ultra-precision machining: Electrolytic polishing or chemical mechanical polishing is used to reduce the inner wall roughness of the pipe to the nanometer level and reduce the gas flow resistance;

[0068] 2. Chemical cleaning: The pipe is immersed in ethanol or sodium hydroxide to remove impurities such as oil stains and rust on the inner wall, improve the cleanliness and flatness of the inner wall, and after cleaning, it is rinsed with clean water and dried.

[0069] 3. Coating with anti-rust paint: Uniformly coating anti-rust paint on the inner wall of the pipe can not only prevent the pipe from rusting and corroding, but also make the inner wall surface smoother to a certain extent and reduce the gas flow resistance.

[0070] Among them, the voltage stabilizing component includes a pressure sensor and a pressure regulating valve. The pressure sensor is electrically connected to the input end of the controller 5, and the output end of the controller 5 is electrically connected to the pressure regulating valve, which is used to adjust the opening degree of the pressure regulating valve according to the result of comparing the internal pressure of the buffer chamber collected by the pressure sensor with the preset pressure range, so as to control the internal pressure of the buffer chamber within the preset pressure range, keep the gas pressure in the constant pressure tank stable, and thus provide a gas source with stable pressure for the porous medium burner body 4, and further ensure the stability of the high gas flow rate. For example, when it is detected that the gas flow rate is lower than the preset value, the controller 5 increases the opening degree of the flow regulating valve to allow more gas to enter the porous medium burner, thereby increasing the flow rate; conversely, when the flow rate is too high, the opening degree of the regulating valve is reduced to lower the flow rate. Through this closed-loop control method, precise and stable control of the high gas flow rate is achieved, ensuring that the porous medium burner operates under the best working conditions.

[0071] The flow stabilizing component 3 includes a flow regulating valve and a flow velocity sensor arranged in sequence on the outlet pipeline. The flow velocity sensor is electrically connected to the input end of the controller 5, and the output end of the controller 5 is electrically connected to the flow regulating valve, which is used to adjust the opening degree of the flow regulating valve according to the result of comparing the input flow velocity of the porous medium burner body 4 collected by the flow velocity sensor with the preset flow velocity range, so as to control the input flow velocity of the porous medium burner body 4 within the preset flow velocity range.

[0072] The porous medium burner body 4 includes a housing, a combustion chamber 41 and an air outlet channel 46 opened inside the housing, and a porous medium filled between the combustion chamber 41 and the air outlet channel 46. The porous medium is a layered structure, and the porous medium includes a bottom layer medium 42, a middle layer medium 43 and a top layer medium 44 arranged in sequence from the combustion chamber 41 to the air outlet channel 46. Moreover, the pore diameters and porosities of the bottom layer medium 42, the middle layer medium 43 and the top layer medium 44 decrease in sequence. With the above structure, it is convenient for gas to quickly and evenly diffuse into the combustion area, can stabilize the flame and promote the combustion reaction, can also ensure complete combustion and reduce heat loss.

[0073] An insulating layer 45 is arranged on the inner wall of the housing, which can effectively reduce the heat dissipation to the housing of the porous medium burner, improve the combustion efficiency. A circulating cooling channel 47 is arranged on the outer wall of the housing, and a cooling medium is filled in the circulating cooling channel 47. The cooling medium is cooling water or cooling air, which is used to take away the excess heat on the wall surface of the combustion chamber 41, prevent the wall surface temperature from being too high, ensure the safe operation and long-term stability of the porous medium burner, and at the same time contribute to maintaining the temperature uniformity in the combustion chamber 41.

[0074] The porous medium is made of porous foam ceramic material, the housing is made of ceramic fiber material, and the constant pressure tank body 1 is made of stainless steel material to ensure stable and reliable operation in a high-temperature and high-pressure gas environment.

[0075] A plurality of temperature sensors 8 are axially and uniformly arranged on the air outlet channel 46. A discharge monitor 6 is arranged at the output end of the air outlet channel 46. A flame monitor and a temperature sensor are arranged in the combustion chamber 41. The temperature sensor 8, the flame monitor and the discharge monitor 6 are all electrically connected to the controller 5.

[0076] It should be noted that the above-mentioned electronic components are all mature products on the market. In this embodiment, only after purchasing them and connecting them according to the instruction manual, there is no improvement on their circuit connection structure and principle, so the circuit connection structure and principle will not be elaborated here.

[0077] A working method of a porous medium burner based on a constant pressure tank to control high gas flow rate includes the following steps:

[0078] S1. Installation and debugging;

[0079] S11. Assembly: Connect the porous medium burner body 4 and the constant pressure tank body 1 through an air outlet pipe, and arrange a voltage stabilizing component and a flow stabilizing component;

[0080] S12. Pressure test: Conduct a sealing and pressure resistance test on the constant pressure tank body 1 to ensure that it can stably maintain a preset pressure;

[0081] S13. Calibration: Calibrate the flow stabilizing component 3 using a standard flowmeter to ensure measurement and control accuracy;

[0082] S14. Linkage debugging: Simulate different working conditions and check the collaborative working ability of each component;

[0083] S2. Start-up and operation;

[0084] Fill the constant pressure tank body 1 with gas and adjust it to within the preset pressure, and start the voltage stabilizing component to make the gas enter the porous medium burner body at a set flow rate. Ignite the fuel in the combustion chamber 41. During the combustion process, with the help of the temperature sensor 8, the flame monitor and the discharge monitor 6, the local temperature, the flame (the stability, shape and position of the flame) and the discharged gas (such as nitrogen oxides and carbon monoxide) are detected in real time, and then the flow regulating valve of the flow stabilizing component 3 is adjusted in real time according to the monitoring results, so as to adaptively adjust the flow rate of the gas entering the porous medium burner body.

[0085] The adaptive adjustment described in step S2 includes an adaptive adjustment method based on temperature and an adaptive adjustment method based on emissions;

[0086] Among them, the adaptive adjustment method based on temperature specifically includes the following steps:

[0087] Step 1: Use a temperature sensor to collect temperature data at multiple positions in the combustion chamber and perform preprocessing (convert the analog quantity to the actual temperature value through the S_ITR instruction and perform filtering to remove noise interference. For example, adopt a moving average filtering algorithm with a window size of , and calculate the average value of consecutive temperature data as the current effective temperature value), obtaining multiple actual temperature values;

[0088] Step 2: Deviation calculation: Compare multiple actual temperature values with the preset temperature uniform distribution target value and calculate the temperature deviation ;

[0089] Step 3: Based on an improved algorithm of PID control, calculate the required change in gas flow rate and the change in the pressure of the constant pressure tank :

[0090] ;

[0091] ;

[0092] In the formula, , and represent the proportional coefficient, integral coefficient, and differential coefficient respectively; represents the th actual temperature value; represents the number of actual temperature values; represents the temperature deviation calculated in the previous calculation; represents a function with the input as the change in gas flow rate and the output as the change in the pressure of the constant pressure tank, which is obtained through fitting experiments;

[0093] Step 4: Determine the opening value of the flow regulating valve based on the change in gas flow rate and the change in the pressure of the constant pressure tank :

[0094] ;

[0095] In the formula, represents the th change in gas flow rate; represents the change in gas flow rate calculated in the previous calculation; represents the adjustment coefficient;

[0096] The adaptive regulation method based on emissions specifically includes the following steps:

[0097] Step 1: Based on the comprehensive emission over-standard multiple Determine the adjustment levels of the gas flow rate and the opening values of the flow control valves;

[0098] In the second step, use an emission monitor to continuously monitor multiple types of emission gases, such as nitrogen oxides (NOx) and carbon monoxide (CO), and measure the concentration of each type of emission gas against the corresponding environmental protection standard values and calculate the emission over-standard multiples for each type of gas :

[0099] ;

[0100] In the third step, calculate the comprehensive emission over-standard multiple :

[0101] ;

[0102] wherein, are all weight coefficients;

[0103] In the fourth step, compare and determine the opening value of the flow control valve corresponding to the comprehensive emission over-standard multiple .

[0104] In this embodiment, after running for a period of time, the following repairs and maintenance are required:

[0105] Regularly maintain the constant pressure tank, and check the working conditions of components such as the buffer chamber, pressure stabilizing components, and gas filters inside the tank. Clean the impurities and dust in the gas filter to ensure the purity of the gas; check the accuracy and reliability of the pressure control valve and pressure sensor, and calibrate or replace them if necessary. Regularly maintain the flow control valve and flow rate sensor of the flow stabilizing components, check the sealing performance and flexibility of the valve, and calibrate the measurement accuracy of the flow rate sensor. Check the porous medium of the porous medium burner to see if there is any blockage, sintering, or damage, and replace some of the porous medium in a timely manner if necessary. At the same time, check and maintain the heat insulation layer, cooling channels, and combustion chamber wall of the burner to ensure good heat insulation and cooling effects. Regularly check and maintain the sensors, controllers, and actuators of the operation monitoring and adaptive adjustment system, update the control software and algorithms, and ensure the accurate and reliable monitoring and control functions of the system. Through regular maintenance, extend the service life of the entire burner system and ensure its long-term stable and efficient operation.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions of the present invention or make equivalent replacements, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A porous medium burner for controlling high gas flow rate based on a constant pressure tank, comprising a constant pressure tank body and a porous medium burner body, characterized in that: A buffer chamber is arranged inside the constant pressure tank body. A voltage stabilizing component is arranged inside the buffer chamber. The air inlet end of the buffer chamber is communicated with a gas mixer through a gas filter. The air outlet end of the buffer chamber is communicated with the air inlet end of the porous medium burner body through an air outlet pipe. A flow stabilizing component is arranged on the air outlet pipe. The voltage stabilizing component includes a pressure sensor and a pressure regulating valve. The pressure sensor is electrically connected to the input end of the controller. The output end of the controller is electrically connected to the pressure regulating valve, and is used to adjust the opening degree of the pressure regulating valve according to the result of comparing the internal pressure of the buffer chamber collected by the pressure sensor with the preset pressure range, so as to control the internal pressure of the buffer chamber within the preset pressure range. The flow stabilizing component includes a flow regulating valve and a flow velocity sensor arranged in sequence on the air outlet pipe. The flow velocity sensor is electrically connected to the input end of the controller. The output end of the controller is electrically connected to the flow regulating valve, and is used to adjust the opening degree of the flow regulating valve according to the result of comparing the input flow velocity of the porous medium burner body collected by the flow velocity sensor with the preset flow velocity range, so as to control the input flow velocity of the porous medium burner body within the preset flow velocity range. The porous medium burner body includes a housing, a combustion chamber and an air outlet channel opened inside the housing, and a porous medium filled between the combustion chamber and the air outlet channel. The porous medium is a layered structure. The porous medium includes a bottom layer medium, a middle layer medium and a top layer medium arranged in sequence from the combustion chamber to the air outlet channel, and the pore diameters and porosities of the bottom layer medium, the middle layer medium and the top layer medium decrease in sequence. A heat insulation layer is arranged on the inner wall of the housing. A circulating cooling channel is arranged on the outer wall of the housing. A cooling medium is filled in the circulating cooling channel. The cooling medium is cooling water or cooling air. The porous medium is made of porous foam ceramic material. The housing is made of ceramic fiber material. The constant pressure tank body is made of stainless steel material. A plurality of temperature sensors are axially and uniformly arranged on the air outlet channel. An emission monitor is arranged at the output end of the air outlet channel. A flame monitor and a temperature sensor are arranged in the combustion chamber. The temperature sensor, the flame monitor and the emission monitor are all electrically connected to the controller.

2. The working method of the porous medium burner for controlling the high gas flow rate based on a constant pressure tank as described in claim 1 above, characterized in that: It includes the following steps: S1. Installation and commissioning; S11. Assembly: Connect the porous medium burner body with the constant pressure tank body by using the air outlet pipe, and arrange the voltage stabilizing component and the flow stabilizing component. S12. Pressure test: Conduct a sealing and pressure resistance test on the constant pressure tank body to ensure that it can stably maintain the preset pressure. S13. Calibration: Calibrate the flow stabilizing component with a standard flowmeter to ensure the measurement and control accuracy. S14. Linkage commissioning: Simulate different working conditions and check the collaborative working ability of each component. S2. Start-up and operation; Fill the constant pressure tank body with gas and adjust it to within the preset pressure, and start the voltage stabilizing component to make the gas enter the porous medium burner body at a set flow velocity. Ignite the fuel in the combustion chamber, and during the combustion process, use the temperature sensor, the flame monitor and the emission monitor to detect the local temperature, flame and emission gas in real time, and then adjust the flow regulating valve of the flow stabilizing component in real time according to the monitoring results, so as to adaptively adjust the flow velocity of the gas entering the porous medium burner body.

3. The working method of the porous medium burner for controlling high gas flow rate based on a constant pressure tank according to claim 2, characterized in that: The adaptive regulation described in step S2 includes an adaptive regulation method based on temperature and an adaptive regulation method based on emissions; Among them, the adaptive regulation method based on temperature specifically includes the following steps: First step, use temperature sensors to collect temperature data at multiple positions in the combustion chamber and perform preprocessing to obtain multiple actual temperature values; Step 2. Deviation calculation: Compare multiple actual temperature values with the target value of the preset uniform temperature distribution, and calculate the temperature deviation ; Step 3: Based on the improved PID control algorithm, calculate the change in the gas flow rate that needs to be adjusted and the change in the pressure of the constant pressure tank : ； ； In the formula, , and represent the proportional coefficient, integral coefficient, and differential coefficient, respectively; represents the th actual temperature value; represents the number of actual temperature values; represents the temperature deviation of the previous calculation; represents a function with the change in gas flow rate as the input and the change in the pressure of the constant-pressure tank as the output; Step 4: Based on the change in gas flow rate and the change in the pressure of the constant pressure tank determine the opening value of the flow regulating valve : ； In the formula, represents the th gas flow rate change; represents the gas flow rate change calculated in the previous time; represents the adjustment coefficient; The adaptive regulation method based on emissions specifically includes the following steps: Step 1: Based on the comprehensive emission over-standard multiple Formulate the adjustment level of the gas flow rate and the opening value of the flow control valve; Step 2: Use an emission monitor to monitor multiple types of emission gases in real time, and measure the concentration of each type of emission gas against the environmental protection standard value for the corresponding type to calculate the multiple of the emission exceeding the standard for each type of gas : ； Step 3: Calculate the multiple of the comprehensive emission exceeding the standard : ； In the formula, are all weighting coefficients; Step 4. Compare and determine the multiple of the comprehensive emission exceeding the standard The opening value of the corresponding flow regulating valve.

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