Control method and system for improving heat accumulating type combustion pressure

Abstract

The invention relates to the technical field of heat accumulating type combustion, in particular to a control method and system for improving heat accumulating type combustion pressure. A relation model II; an air supply valve is adjusted; until the gas pressure at the gas pipeline detection point, the air pressure at the air pipeline detection point, the smoke exhaust pressure at the gas pipeline detection point and the smoke exhaust pressure at the air pipeline detection point reach the specified range of the current month average value corresponding to the optimal value of the gas heat accumulator nozzle pressure and the optimal value of the air heat accumulator nozzle pressure. The method has the advantages that the pressure value detected in real time is compared with the monthly average value model established on the basis of historical data, the opening degree of the gas supply valve is automatically adjusted, resistance increase caused by ash deposition is compensated, it is guaranteed that the flow of air and gas and the pressure of a hearth are always kept at the optimal value in the whole life cycle of the heat accumulator, and the service life of the heat accumulator is prolonged. And the problems of air-fuel ratio imbalance and furnace pressure fluctuation caused by resistance change are solved.

Description

Technical Field

[0001] This invention relates to the field of regenerative combustion technology, and in particular to a method and system for improving regenerative combustion pressure control. Background Technology

[0002] Regenerative thermal combustion (RTC) technology is an energy-saving combustion technology widely used in industrial furnaces and kilns. This technology utilizes pairs of RTC burners on both sides of the furnace or kiln, periodically performing combustion and flue gas extraction to recover and utilize waste heat from the flue gas. This preheats the combustion air and coal gas to a high temperature, achieving energy conservation and emission reduction. Specifically, when one burner is in combustion mode, the other burner is in flue gas extraction mode. The flue gas burner introduces the flue gas through its body into a heat storage box containing a heat storage medium (usually a honeycomb structure), heating the medium to a high temperature. Once the heat storage medium is fully heated, the combustion burner closes, and the flue gas burner begins combustion. The combustion air and coal gas flow through the heat storage box are heated to a high temperature by the heat storage medium, achieving heat recovery and utilization.

[0003] This technology offers significant energy-saving advantages, fully utilizing the low-calorific-value blast furnace gas generated during blast furnace ironmaking, thus avoiding direct emission into the atmosphere and preventing energy waste and environmental pollution. Therefore, regenerative combustion technology has been widely applied in industrial furnaces such as rolling mill heating furnaces in steel enterprises.

[0004] However, some problems exist in the existing technology that urgently need to be solved. During prolonged use, the pores of the heat storage medium gradually become clogged, leading to increased resistance in flue gas and air supply. As time progresses, the pores gradually shrink, and the resistance continuously changes, posing significant challenges to combustion control. Specifically: 1. During combustion, fluctuations in gas supply pressure can affect combustion efficiency and stability, leading to incomplete combustion of fuel and increased energy consumption; 2. During the flue gas exhaust process, the increased resistance to flue gas exhaust will lead to poor flue gas exhaust, affecting the temperature distribution inside the furnace and reducing the heating effect; 3. Due to the lack of effective pressure monitoring and regulation methods, it is difficult to adjust the opening of the gas supply and exhaust valves in real time to adapt to changes in the resistance of the heat storage body, resulting in low operating efficiency of the combustion system and increased energy consumption.

[0005] Pressure control in regenerative combustion systems is mostly based on fixed parameters or empirical settings, lacking dynamic monitoring and analysis of the actual operating status of the regenerator. This makes it impossible to adjust control strategies in a timely manner when faced with changes in the regenerator volume, such as ash buildup or blockage, leading to system instability and impacting production efficiency and product quality. Summary of the Invention

[0006] The purpose of this invention is to provide an improved method and system for controlling the pressure of regenerative combustion, adjusting the air and gas pressure and the exhaust and induced draft pressure to improve the pressure of the regenerative burner to meet combustion requirements.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An improved method for controlling regenerative combustion pressure includes: S1. When the regenerator burner is in combustion state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the gas regenerator nozzle, and the pressure at the air regenerator nozzle. S2. Based on the data recorded in S1, establish a model 1 showing the relationship between the optimal value of the gas regenerator nozzle pressure, the optimal value of the air regenerator nozzle pressure, and the average value of the gas pressure at the gas pipeline monitoring point for the nth month and the average value of the air pressure at the air pipeline monitoring point for the nth month. S3. When the regenerator burner is in the flue gas exhaust state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the nozzle of the gas regenerator, and the pressure at the nozzle of the air regenerator. S4. Based on the data recorded in S3, establish Model 2 for the relationship between the optimal values ​​of the gas nozzle exhaust pressure and the optimal values ​​of the air nozzle exhaust pressure and the average values ​​of the exhaust pressure at the gas pipeline monitoring point for the nth month and the average values ​​of the exhaust pressure at the air pipeline monitoring point for the nth month. S5. As the volume of the gas / air heat storage body decreases, the nozzle pressure of the gas heat storage body and the nozzle pressure of the air heat storage body decrease to their optimal values. Adjust the gas supply valves until the gas pressure at the gas pipeline monitoring point, the air pressure at the air pipeline monitoring point, the exhaust pressure at the gas pipeline monitoring point, and the exhaust pressure at the air pipeline monitoring point all reach the specified range of the monthly average corresponding to the optimal values ​​of the gas and air heat storage body nozzle pressures.

[0008] The first relational model is: ①; ②; In formula ①, P kp This represents the optimal nozzle pressure for the air regenerator, expressed in Pa. The optimal value of the air regenerator nozzle pressure corresponds to the average monthly gas pressure at the air pipeline monitoring point, in Pa. Represents a linear function; p represents the nozzle; k represents air; In formula ②, P mp This represents the optimal nozzle pressure for the gas regenerator, expressed in Pa. The nth month's average air pressure at the gas pipeline monitoring point corresponding to the optimal value of the gas regenerator nozzle pressure is expressed in Pa. represents a linear function; m represents gas.

[0009] Relational Model 2 is as follows: ③; ④; In formula ③, This represents the optimal exhaust pressure at the air nozzle, expressed in Pa. The average monthly smoke exhaust pressure at the air duct monitoring point is expressed in Pa. Represent a linear function; In formula ④, This represents the optimal exhaust pressure at the gas nozzle, expressed in Pa. The average value of the exhaust pressure at the gas pipeline monitoring point for the nth month is expressed in Pa. This represents a linear function.

[0010] In S5, when the regenerative burner is in combustion mode, if the gas pressure at the gas pipeline detection point is lower than... Within the specified range, increase the set opening of the gas flow regulating valve until the gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the air pressure at the air duct detection point is lower than... Within the specified range, increase the set opening of the air flow regulating valve until the air pressure at the air duct detection point reaches the specified value. Up to the specified range.

[0011] In S5, when the regenerable burner is in the flue gas exhaust state, if the flue gas pressure at the gas pipeline detection point exceeds... Within the specified range, increase the set opening of the gas-side flue gas regulating valve until the flue gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the exhaust pressure at the air duct testing point exceeds... Within the specified range, increase the set opening of the air-side smoke exhaust regulating valve until the smoke exhaust pressure at the air duct detection point reaches the specified value. Up to the specified range.

[0012] An improved regenerative combustion pressure control system includes a heating furnace, several regenerative burners, a gas supply valve, and a flue gas valve. The gas supply valve includes a gas flow regulating valve and an air flow regulating valve. The flue gas valve includes a gas-side flue gas regulating valve and an air-side flue gas regulating valve. Several regenerative burners are mounted on the heating furnace, some of which are gas-based regenerative burners and others are air-based regenerative burners. The gas-based regenerative burners on both sides of the heating furnace are connected to the corresponding gas-side flue gas regulating valve and gas flow regulating valve via pipes, and the air-based regenerative burners on both sides of the heating furnace are connected to the corresponding air-side flue gas regulating valve and air flow regulating valve via pipes.

[0013] The gas regenerating burner has a gas regenerating chamber inside, and the air regenerating burner has an air regenerating chamber inside. The gas regenerating chamber contains multiple gas regenerating bodies, and the air regenerating chamber contains multiple air regenerating bodies.

[0014] The outer surface of the furnace body is provided with air heat storage nozzle pressure measuring holes and gas heat storage nozzle pressure measuring holes. The air heat storage nozzle pressure measuring holes are used to measure the air heat storage body nozzle pressure, and the gas heat storage nozzle pressure measuring holes are used to measure the gas heat storage body nozzle pressure. Pressure sensor 1 is installed on the pipe near the gas regenerator burner. Pressure sensor 1 is used to detect the pressure in front of the gas regenerator. Pressure sensor 2 is installed on the pipe near the air regenerator burner. Pressure sensor 2 is used to detect the pressure in front of the air regenerator.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By using pressure gauges and pressure sensors to monitor key parameters such as the pressure before the gas accumulator, the pressure before the air accumulator, the gas nozzle pressure, and the air nozzle pressure in real time, and establishing a monthly dynamic relationship model between the optimal nozzle pressure and the pressure at the detection point, this invention can monitor the ash accumulation and blockage of the accumulator in real time and online, accurately diagnose the changes in local resistance caused by it, and change the traditional maintenance method that relies on experience judgment or passively waiting for faults. It upgrades the maintenance strategy from "post-event handling" to "pre-event warning" and "in-event control". 2. This invention is not a simple monitoring system, but rather a system that directly converts monitoring results into control commands. By comparing the real-time pressure value with a monthly average model (i.e., relationship model one and relationship model two) based on historical data, and automatically adjusting the opening of the gas supply valve, the system can automatically compensate for the increased resistance caused by ash accumulation. This ensures that the air and gas flow rates and furnace pressure are always maintained at the optimal values ​​throughout the entire lifespan of the heat storage body, effectively overcoming the problems of air-fuel ratio imbalance and furnace pressure fluctuation caused by resistance changes. 3. By fine-tuning the valve opening to adapt to changes in resistance, rather than forcing gas through blocked channels, the mechanical stress on the heat storage body is reduced. This slows down the ash accumulation process and the risk of damage caused by excessive pressure difference to a certain extent, extending the equipment replacement cycle. The recorded monthly pressure change data provides a scientific basis for predictive maintenance. Operators can accurately predict the blockage trend of the heat storage body and reasonably arrange the downtime for cleaning or replacement, avoiding production losses caused by unplanned downtime. This realizes the transformation from periodic maintenance to on-demand maintenance, significantly reducing maintenance costs and labor intensity. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an improved regenerative combustion pressure control structure.

[0017] In the diagram: 1. Gas heat storage body; 2. Air heat storage body; 3. Pressure sensor one; 4. Pressure sensor two; 5. Gas heat storage nozzle pressure measuring hole; 6. Air heat storage nozzle pressure measuring hole; 7. Gas flow regulating valve; 8. Gas side exhaust regulating valve; 9. Air flow regulating valve; 10. Air side exhaust regulating valve. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0019] The following embodiments are implemented based on the technical solution of the present invention, providing detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. Unless otherwise specified, the methods used in the following embodiments are conventional methods.

[0020] Example 1 See Figure 1 An improved regenerative combustion pressure control system includes a heating furnace, several regenerative burners, a gas supply valve, and a flue gas valve. The gas supply valve includes a gas flow regulating valve 7 and an air flow regulating valve 9. The flue gas valve includes a gas-side flue gas regulating valve 8 and an air-side flue gas regulating valve 10. Several regenerative burners are mounted on the heating furnace. Some of the regenerative burners are gas regenerative burners, and others are air regenerative burners. Each gas regenerative burner has a gas regenerative chamber, and each air regenerative burner has an air regenerative chamber. Each gas regenerative chamber contains multiple gas regenerators 1 and multiple air regenerators 2. The gas regenerative burners on both sides of the heating furnace are connected to the corresponding gas-side flue gas regulating valve 8 and gas flow regulating valve 7 via pipes, and the air regenerative burners on both sides of the heating furnace are connected to the corresponding air-side flue gas regulating valve 10 and air flow regulating valve 9 via pipes. The input ends of the gas-side flue gas regulating valve 8, the gas flow regulating valve 7, the air-side flue gas regulating valve 10, and the air flow regulating valve 9 are respectively connected to the gas source.

[0021] The outer surface of the heating furnace body is provided with air regenerative nozzle pressure measuring hole 6 and gas regenerative nozzle pressure measuring hole 5. The air regenerative nozzle pressure measuring hole 6 is inserted into a steel pipe to the center of the regenerative burner. One end of the steel pipe is connected to a pressure gauge to measure the air regenerative body nozzle pressure. Similarly, the gas regenerative nozzle pressure measuring hole is used to measure the gas regenerative body nozzle pressure. The pressure measuring hole is only inserted into the steel pipe when measuring pressure. During normal production, the steel pipe does not need to be inserted to prevent the steel pipe from burning out in the furnace for a long time.

[0022] Pressure sensor 3 is installed on the pipe near the gas regenerator burner. Pressure sensor 3 is used to detect the pressure in front of the gas regenerator 1. Pressure sensor 4 is installed on the pipe near the air regenerator burner. Pressure sensor 4 is used to detect the pressure in front of the air regenerator 2. Pressure sensor 3 and pressure sensor 4 are connected to PLC / DCS.

[0023] An improved method for controlling the pressure of regenerative combustion, implemented using a PLC / DCS, includes: S1. When the regenerator burner is in combustion state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the gas regenerator nozzle, and the pressure at the air regenerator nozzle. S2. Based on the data recorded in S1, establish a model 1 showing the relationship between the optimal values ​​of the gas regenerator nozzle pressure, the optimal values ​​of the air regenerator nozzle pressure, and the average values ​​of the gas pressure and air pressure at the gas pipeline monitoring points for the nth month: ①; ②; In formula ①, P kp This represents the optimal nozzle pressure for the air regenerator, expressed in Pa. The average monthly gas pressure at the air pipeline monitoring point is expressed in Pa. Represents a linear function; p represents the nozzle; k represents air; In formula ②, P mp This represents the optimal nozzle pressure for the gas regenerator, expressed in Pa. This represents the average air pressure at the gas pipeline monitoring point for the nth month, in Pa. represents a linear function; m represents gas.

[0024] S3. When the regenerator burner is in the flue gas exhaust state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the nozzle of the gas regenerator, and the pressure at the nozzle of the air regenerator. S4. Based on the data recorded in S3, establish a model two relating the optimal values ​​of the gas nozzle exhaust pressure and the optimal values ​​of the air nozzle exhaust pressure to the average exhaust pressure at the gas pipeline monitoring point for the nth month and the average exhaust pressure at the air pipeline monitoring point for the nth month: ③; ④; In formula ③, This represents the optimal exhaust pressure at the air nozzle, expressed in Pa. The average monthly smoke exhaust pressure at the air duct monitoring point is expressed in Pa. Represent a linear function; In formula ④, This represents the optimal exhaust pressure at the gas nozzle, expressed in Pa. The average value of the exhaust pressure at the gas pipeline monitoring point for the nth month is expressed in Pa. This represents a linear function.

[0025] S5. Regarding the increase in local resistance caused by ash in the gas / air heat storage volume over time, the following analysis is conducted using Relationship Model 1 and Relationship Model 2: When the regenerative burner is in combustion mode, and the gas pressure at the gas pipeline detection point is lower than... Within the specified range, increase the set opening of the gas flow regulating valve until the gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the air pressure at the air duct detection point is lower than... Within the specified range, increase the set opening of the air flow regulating valve until the air pressure at the air duct detection point reaches the specified value. Up to the specified range.

[0026] When the regenerable burner is in the flue gas exhaust state, when the flue gas pressure at the gas pipeline detection point exceeds... Within the specified range, increase the set opening of the gas-side flue gas regulating valve until the flue gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the exhaust pressure at the air duct testing point exceeds... Within the specified range, increase the set opening of the air-side smoke exhaust regulating valve until the smoke exhaust pressure at the air duct detection point reaches the specified value. Up to the specified range.

[0027] Example 2 In this embodiment, the method and system for improving regenerative combustion pressure control are the same as in Embodiment 1, except that an improved regenerative combustion pressure control process is added.

[0028] The optimal air nozzle pressure P during the first month of operation of the heat storage body k1 =600pa, the average gas pressure at the gas pipeline monitoring point for the first month. The optimal gas nozzle pressure is 650 Pa. m1 =700pa, the average air pressure at the air duct monitoring point for the first month. =740pa; Optimal exhaust pressure at the air nozzle =1 kPa, the optimal value of exhaust pressure at the gas nozzle. =1.1 kPa, the average value of the exhaust pressure at the gas pipeline monitoring point for the first month. =1.2 kPa, the average value of the exhaust pressure at the air duct monitoring point for the first month. =1.15 kPa.

[0029] When the regenerator has been in operation for five months, the optimal air nozzle pressure P is when the regenerator burner is in combustion mode. k5 =680pa, the average gas pressure at the gas pipeline monitoring point for the first month. The optimal gas nozzle pressure is 670 Pa. m5 =770pa, the average air pressure at the air duct monitoring point for the first month. =760pa; When the pressure value at the detection point does not exceed the average value +20pa (+20pa is the set value; the valve is set to a non-operation range to reduce the frequency of operation), there is no need to increase the opening of the air supply valve; Optimal value of exhaust pressure at the air nozzle. =1.23 kPa, the optimal value of exhaust pressure at the gas nozzle. =1.2 kPa, the average value of the exhaust pressure at the gas pipeline monitoring point for the first month. =1.25 kPa, the average value of the exhaust pressure at the air duct monitoring point for the first month. =1.2kPa. When the pressure value at the detection point does not exceed the average value +30pa (+30pa is the set value, and the valve is set to a range where it does not operate in order to reduce the frequency of operation), there is no need to increase the opening of the smoke exhaust valve.

[0030] When the regenerator has been in operation for eight months, the optimal air nozzle pressure P is when the regenerator burner is in combustion mode. k8 =710pa, the average gas pressure at the gas pipeline monitoring point for the first month. The optimal gas nozzle pressure is 750 Pa. m8 =800pa, the average air pressure at the air duct monitoring point for the first month. =810pa. When the pressure at the detection point exceeds the average pressure by 20pa, increase the opening of the air supply valve by 1% (1% is a set value to prevent excessive pressure fluctuations due to large opening changes). Repeat this step until the pressure at the detection point does not exceed the average pressure by 20pa. Optimal exhaust pressure at the air nozzle. =1.25 kPa, the optimal value of exhaust pressure at the gas nozzle. =1.23 kPa, the average value of the exhaust pressure at the gas pipeline monitoring point for the first month. =1.3 kPa, the average value of the exhaust pressure at the air duct monitoring point for the first month. =1.27 kPa. When the pressure value at the detection point exceeds the average value by 30 Pa, increase the opening of the smoke exhaust valve by 2% ("2%" is the set value to prevent excessive pressure changes due to excessive opening changes). Repeat this step until the pressure value at the detection point does not exceed the average value of 30 Pa.

[0031] This invention uses pressure gauges and pressure sensors to monitor key parameters in real time, such as the pressure before the gas accumulator, the pressure before the air accumulator, the gas nozzle pressure, and the air nozzle pressure. It also establishes a monthly dynamic relationship model between the optimal nozzle pressure and the pressure at the monitoring point. This invention can monitor the ash accumulation and blockage of the accumulator in real time and online, accurately diagnosing the resulting changes in local resistance. It changes the traditional maintenance method that relies on experience-based judgment or passively waiting for faults, elevating the maintenance strategy from "post-event handling" to "pre-event warning" and "in-event control." This invention does not simply monitor; instead, it directly converts the monitoring results into control commands. By comparing the real-time detected pressure values ​​with monthly average models (i.e., Relationship Model 1 and Relationship Model 2) established based on historical data, it automatically adjusts the gas supply valve or flue gas valve. By adjusting the valve opening, the system can automatically compensate for the increased resistance caused by ash accumulation, ensuring that the air and gas flow rates and furnace pressure remain at optimal values ​​throughout the entire lifespan of the regenerator. This effectively overcomes the problems of air-fuel ratio imbalance and furnace pressure fluctuations caused by resistance changes. By fine-tuning the valve opening to adapt to resistance changes, rather than forcing gas through blocked channels, the mechanical stress of the regenerator is reduced, which to some extent slows down the ash accumulation process and the risk of damage caused by excessive pressure difference, thus extending the equipment replacement cycle. The recorded monthly pressure change data provides a scientific basis for predictive maintenance. Operators can accurately predict the blockage trend of the regenerator and reasonably arrange downtime for cleaning or replacement, avoiding production losses caused by unplanned downtime. This realizes the transformation from periodic maintenance to on-demand maintenance, significantly reducing maintenance costs and labor intensity.

Claims

1. A method for improving pressure control in regenerative combustion, characterized in that, include: S1. When the regenerator burner is in combustion state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the gas regenerator nozzle, and the pressure at the air regenerator nozzle. S2. Based on the data recorded in S1, establish a model 1 showing the relationship between the optimal value of the gas regenerator nozzle pressure, the optimal value of the air regenerator nozzle pressure, and the average value of the gas pressure at the gas pipeline monitoring point for the nth month and the average value of the air pressure at the air pipeline monitoring point for the nth month. S3. When the regenerator burner is in the flue gas exhaust state, detect and record the pressure in front of the gas regenerator, the pressure in front of the air regenerator, the pressure at the nozzle of the gas regenerator, and the pressure at the nozzle of the air regenerator. S4. Based on the data recorded in S3, establish Model 2 for the relationship between the optimal values ​​of the gas nozzle exhaust pressure and the optimal values ​​of the air nozzle exhaust pressure and the average values ​​of the exhaust pressure at the gas pipeline monitoring point for the nth month and the average values ​​of the exhaust pressure at the air pipeline monitoring point for the nth month. S5. As the volume of the gas / air heat storage body decreases, the nozzle pressure of the gas heat storage body and the nozzle pressure of the air heat storage body decrease to their optimal values. Adjust the gas supply valves until the gas pressure at the gas pipeline monitoring point, the air pressure at the air pipeline monitoring point, the exhaust pressure at the gas pipeline monitoring point, and the exhaust pressure at the air pipeline monitoring point all reach the specified range of the monthly average corresponding to the optimal values ​​of the gas and air heat storage body nozzle pressures.

2. The method for improving regenerative combustion pressure control according to claim 1, characterized in that, The first relational model is as follows: ①； ②； In formula ①, P kp This represents the optimal nozzle pressure for the air regenerator, expressed in Pa. The optimal value of the air regenerator nozzle pressure corresponds to the average monthly gas pressure at the air pipeline monitoring point, in Pa. Represents a linear function; p represents the nozzle; k represents air; In formula ②, P mp This represents the optimal nozzle pressure for the gas regenerator, expressed in Pa. The nth month's average air pressure at the gas pipeline monitoring point corresponding to the optimal value of the gas regenerator nozzle pressure is expressed in Pa. represents a linear function; m represents gas.

3. The method for improving regenerative combustion pressure control according to claim 1, characterized in that, The second relational model is as follows: ③； ④； In formula ③, This represents the optimal exhaust pressure at the air nozzle, expressed in Pa. The average monthly smoke exhaust pressure at the air duct monitoring point is expressed in Pa. Represent a linear function; In formula ④, This represents the optimal exhaust pressure at the gas nozzle, expressed in Pa. The average value of the exhaust pressure at the gas pipeline monitoring point for the nth month is expressed in Pa. This represents a linear function.

4. The method for improving regenerative combustion pressure control according to claim 1, characterized in that, In S5, when the regenerative burner is in combustion mode, if the gas pressure at the gas pipeline detection point is lower than... Within the specified range, increase the set opening of the gas flow regulating valve until the gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the air pressure at the air duct detection point is lower than... Within the specified range, increase the set opening of the air flow regulating valve until the air pressure at the air duct detection point reaches the specified value. Up to the specified range.

5. The method for improving regenerative combustion pressure control according to claim 1, characterized in that, In S5, when the regenerable burner is in the flue gas exhaust state, if the flue gas pressure at the gas pipeline detection point exceeds... Within the specified range, increase the set opening of the gas-side flue gas regulating valve until the flue gas pressure at the gas pipeline monitoring point reaches the specified value. Up to the specified range; when the exhaust pressure at the air duct testing point exceeds... Within the specified range, increase the set opening of the air-side smoke exhaust regulating valve until the smoke exhaust pressure at the air duct detection point reaches the specified value. Up to the specified range.

6. An improved regenerative combustion pressure control system for implementing the method of any one of claims 1-5, comprising a heating furnace, a plurality of regenerative burners, a gas supply valve, and a flue gas valve, wherein the gas supply valve includes a gas flow regulating valve and an air flow regulating valve, and the flue gas valve includes a gas-side flue gas regulating valve and an air-side flue gas regulating valve; the plurality of regenerative burners are disposed on the heating furnace, some of which are gas regenerative burners and others are air regenerative burners; the gas regenerative burners on both sides of the heating furnace are connected to the corresponding gas-side flue gas regulating valve and the gas flow regulating valve through pipes, and the air regenerative burners on both sides of the heating furnace are connected to the corresponding air-side flue gas regulating valve and the air flow regulating valve through pipes; The gas regenerative burner has a gas regenerative chamber inside, and the air regenerative burner has an air regenerative chamber inside. The gas regenerative chamber contains multiple gas regenerative bodies, and the air regenerative chamber contains multiple air regenerative bodies.

7. An improved regenerative combustion pressure control system according to claim 6, characterized in that, The outer surface of the furnace body is provided with air heat storage nozzle pressure measuring holes and gas heat storage nozzle pressure measuring holes. The air heat storage nozzle pressure measuring holes are used to measure the air heat storage body nozzle pressure, and the gas heat storage nozzle pressure measuring holes are used to measure the gas heat storage body nozzle pressure. Pressure sensor 1 is installed on the pipe near the gas regenerator burner. Pressure sensor 1 is used to detect the pressure in front of the gas regenerator. Pressure sensor 2 is installed on the pipe near the air regenerator burner. Pressure sensor 2 is used to detect the pressure in front of the air regenerator.

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