Regenerative heating furnace flue gas CO content high troubleshooting system and method

Abstract

The invention discloses a troubleshooting system and method for high CO content of flue gas of a heat accumulating type heating furnace, and belongs to the technical field of steel rolling heating furnaces, and the system comprises a heating furnace gas combustion sufficiency troubleshooting module which collects factors affecting the combustion sufficiency of gas in the heating furnace and constructs a first troubleshooting data set and a first troubleshooting process guidance file; the blowback system input accuracy checking module is used for collecting factors influencing the input accuracy of the blowback system and constructing a second troubleshooting data set and a second troubleshooting process guidance file; the back-blowing two-way valve, gas three-way valve and flue gas three-way valve action time sequence accuracy checking module is used for collecting factors influencing the action time sequence accuracy of the back-blowing two-way valve, the gas three-way valve and the flue gas three-way valve and constructing a third troubleshooting data set and a third troubleshooting process guidance file; and the three-way reversing valve sealing performance checking module is used for collecting factors influencing the sealing performance of the three-way reversing valve and constructing a fourth troubleshooting data set and a fourth troubleshooting process guidance file.

Description

Technical Field

[0001] The present invention belongs to the technical field of rolling heating furnaces, and particularly relates to a fault troubleshooting system and method for high CO content in the flue gas of a regenerative heating furnace. Background Art

[0002] As is well known, regenerative heating furnaces are one of the very key equipment on the hot rolling process line. These regenerative heating furnaces mainly use high-turn mixed gas. After the flue gas of the regenerative heating furnace is treated by desulfurization and denitrification, it is discharged into the atmosphere through a special coal smoke chimney and an empty smoke chimney.

[0003] In recent years, with the continuous improvement of human environmental protection awareness, the legal requirements related to environmental protection have become increasingly strict. For example, there are clear regulations and restrictions on the emission concentration of carbon monoxide gas. In order to meet these increasingly strict environmental protection legal requirements, enterprises must thoroughly purify the flue gas. However, in the actual production operation process, the emission concentration of carbon monoxide gas often exceeds the specified threshold (such as 3000 mg / m 3 ). Once this situation occurs, it is necessary to immediately conduct problem troubleshooting and analysis. However, due to the numerous factors leading to the excessive carbon monoxide concentration and the complex and large structure of the hot rolling process line itself, it is of extremely important significance to quickly and accurately determine the excessive factors and take timely and effective measures for treatment to ensure the normal operation and production efficiency of the hot rolling process line. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a fault troubleshooting system and method for high CO content in the flue gas of a regenerative heating furnace, which can quickly conduct fault troubleshooting when the CO content exceeds the threshold.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The first object of the present invention is to provide a fault troubleshooting system for high CO content in the flue gas of a regenerative heating furnace, including:

[0007] A module for troubleshooting the adequacy of gas combustion in the heating furnace, which collects factors affecting the adequacy of gas combustion in the heating furnace, constructs a first fault troubleshooting data set; and a first troubleshooting process guidance document constructed based on the first fault troubleshooting data set;

[0008] A module for troubleshooting the accuracy of the blowback system input, which collects factors affecting the accuracy of the blowback system input, constructs a second fault troubleshooting data set; and a second troubleshooting process guidance document constructed based on the second fault troubleshooting data set;

[0009] Backflush two-way valve, gas three-way valve and flue gas three-way valve action timing accuracy troubleshooting module, collect factors affecting the action timing accuracy of the backflush two-way valve, gas three-way valve and flue gas three-way valve, and construct the third troubleshooting data set; the third troubleshooting process guidance document constructed based on the third troubleshooting data set;

[0010] Three-way reversing valve sealing performance troubleshooting module, collect factors affecting the sealing performance of the three-way reversing valve, construct the fourth troubleshooting data set, and the fourth troubleshooting process guidance document constructed based on the fourth troubleshooting data set.

[0011] Preferably, the factors affecting the full combustion of gas in the heating furnace include: the fluctuation range of the external network pressure of the gas, the operation accuracy of the heating worker, the air-fuel ratio of the heating furnace, and the oxygen content in the flue gas.

[0012] Preferably, the first troubleshooting process guidance document includes:

[0013] Check whether the fluctuation range of the external network pressure of the gas is within the preset range;

[0014] Check whether the operation of the heating worker is accurate;

[0015] Check whether the air-fuel ratio of the heating furnace is within the preset range;

[0016] Check whether the oxygen content in the flue gas is within the preset range; where:

[0017] The preset range of the air-fuel ratio of the heating furnace is 0.85 - 0.95, and the preset range of the oxygen content in the flue gas is 4.5% - 5.5%.

[0018] Preferably, the factors affecting the accuracy of the backflush system input include: triggering interlock protection conditions, dynamic balance of the backflush blower impeller, status of inlet and outlet valves, status of connecting pipes, working status of the backflush system, status of all valves at the inlet and outlet of the backflush system.

[0019] Preferably, the second troubleshooting process guidance document includes:

[0020] Check whether the triggering interlock protection conditions are accurate;

[0021] Check whether the dynamic balance of the backflush blower impeller, the status of inlet and outlet valves, and the status of connecting pipes are normal;

[0022] Check whether the working status of the backflush system is normal;

[0023] Check whether the status of all valves at the inlet and outlet of the backflush system is normal.

[0024] Preferably, the factors affecting the action timing accuracy of the reverse blow two-way valve, the gas three-way valve and the flue gas three-way valve include: the action timing of the cylinders on the air intake and smoke exhaust sides of the gas and coal smoke three-way reversing valve, the action timing of the reverse blow two-way reversing valve and the gas and coal smoke three-way reversing valve, the reverse blow pressure and time, the action timing of each valve, the response speed of each valve action, the compressed air pressure for controlling the cylinder action, and the reverse blower frequency.

[0025] Preferably, the third troubleshooting process instruction document includes:

[0026] Check whether the action timing of the cylinders on the air intake and smoke exhaust sides of the gas and coal smoke three-way reversing valve is accurate;

[0027] Check whether the action timing of the reverse blow two-way reversing valve and the gas and coal smoke three-way reversing valve is accurate;

[0028] Check whether the reverse blow pressure and reverse blow time are accurate;

[0029] Check whether the action timing of each valve is accurate;

[0030] Check whether the response speed of each valve action and the compressed air pressure for controlling the cylinder action are accurate; check whether there is internal leakage in the cylinder;

[0031] Check whether the reverse blower frequency is accurate.

[0032] Preferably, the factors affecting the sealing performance of the three-way reversing valve include: the sealing ring, the pressing degree of the valve plate seal, the gap between the valve plate of the three-way reversing valve and the valve seat of the box body, the connection state of the cylinder and the valve stem, the sealing performance of the valve plate of the three-way reversing valve, the pressing degree of the valve plate seal and the airtightness of the valve plate seal.

[0033] Preferably, the fourth troubleshooting process instruction document includes:

[0034] Check whether the sealing ring of the valve plate of the three-way reversing valve is damaged, loose or fallen off;

[0035] Check whether the lower limit adjustment position of the cylinder of the three-way reversing valve is too high, the pressing degree of the valve plate seal, and whether there is a gap between the valve plate of the three-way reversing valve and the valve seat of the box body;

[0036] Check the connection of the cylinder and the valve stem;

[0037] Check the sealing performance of the valve plate of the three-way reversing valve;

[0038] Check the pressing degree of the valve plate seal;

[0039] Check the airtightness of the valve plate seal.

[0040] The second object of the present invention is to provide a method for troubleshooting the problem of high CO content in the flue gas of a regenerative heating furnace. When the CO content exceeds the threshold, troubleshooting is carried out according to the above-mentioned first troubleshooting process guidance document, second troubleshooting process guidance document, third troubleshooting process guidance document, and fourth troubleshooting process guidance document.

[0041] Compared with the prior art, the advantages and positive effects of the present application are:

[0042] The object of the present invention is to effectively solve the problem of high carbon monoxide (CO) content in the flue gas that occurs during the operation of a regenerative heating furnace. First, through in-depth research and analysis, the present invention has collected various factors that may cause the increase in CO content in the flue gas. These factors include, but are not limited to, incomplete combustion, uneven temperature distribution in the furnace, fuel quality problems, burner failures, etc. Subsequently, the present invention has carefully classified these factors for more systematic fault analysis and processing.

[0043] On this basis, the present invention has developed a series of specific troubleshooting methods for each type of fault. These methods provide detailed guidance to operators on how to take corresponding troubleshooting steps according to different fault types. To further improve the efficiency and accuracy of troubleshooting, the present invention also provides four troubleshooting process guidance documents, corresponding to different troubleshooting stages. These guidance documents include the first troubleshooting process guidance document, the second troubleshooting process guidance document, the third troubleshooting process guidance document, and the fourth troubleshooting process guidance document.

[0044] When it is detected that the CO content in the flue gas exceeds the preset safety threshold, operators can quickly and efficiently carry out troubleshooting according to these troubleshooting process guidance documents. By this method, the source of the problem can be quickly located and corresponding measures can be taken, thereby reducing CO emissions and ensuring the safe and stable operation of the heating furnace. Specific Embodiments

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention.

[0046] A troubleshooting system for high CO content in the flue gas of a regenerative heating furnace includes:

[0047] The gas combustion sufficiency troubleshooting module in the heating furnace collects all kinds of factors that may affect the gas combustion sufficiency in the heating furnace, and constructs a comprehensive first troubleshooting data set based on these factors. Based on this first troubleshooting data set, a first troubleshooting process guidance document is further developed and constructed to ensure that the gas combustion process of the heating furnace can achieve the best efficiency and safety.

[0048] The factors affecting the gas combustion sufficiency in the heating furnace are various, including the fluctuation range of the gas external network pressure, the accuracy of the heating worker's operation, the control of the air-fuel ratio in the heating furnace, and the monitoring of the oxygen content in the flue gas. Each of these factors has a direct impact on the gas combustion sufficiency.

[0049] The first troubleshooting process guidance document details the troubleshooting steps to ensure that the gas combustion process of the heating furnace can reach the best state. These steps include:

[0050] First, it is necessary to check whether the fluctuation range of the gas external network pressure is within the preset safe range;

[0051] Secondly, it is necessary to check whether the operation of the heating worker is accurate and error-free to ensure that the operation meets the process requirements;

[0052] Then, it is necessary to check the air-fuel ratio of the heating furnace to ensure that it is within the preset reasonable range, that is, 0.85 - 0.95;

[0053] Finally, it is necessary to monitor the oxygen content in the flue gas to ensure that it is also within the preset safe range, that is, 4.5% - 5.5%.

[0054] To ensure the combustion efficiency and safety of the heating furnace, the present invention specifically designates the preset range of the air-fuel ratio of the heating furnace as 0.85 - 0.95, and the preset range of the oxygen content in the flue gas as 4.5% - 5.5%. These preset ranges are obtained based on a large number of experiments and data analyses, aiming to provide a scientific and reasonable operation standard for the operation of the heating furnace.

[0055] The backflush system input accuracy troubleshooting module constructs a second troubleshooting data set by collecting various factors that affect the backflush system input accuracy; based on this second troubleshooting data set, a second troubleshooting process guidance document is further constructed to ensure the accurate input of the backflush system.

[0056] There are many factors that affect the backflush system input accuracy, including but not limited to: the accuracy of triggering the interlock protection condition, the dynamic balance of the backflush blower impeller, the status of the inlet and outlet valves, the condition of the connecting pipes, the working status of the backflush system, and the status of all valves at the inlet and outlet of the backflush system.

[0057] The second troubleshooting process guidance document details the following:

[0058] First, it is necessary to check whether the conditions triggering the interlock protection are accurate to ensure that the backflush system is started under the correct conditions;

[0059] Secondly, it is necessary to check the dynamic balance of the impeller of the backflush blower to ensure its smooth operation without abnormalities; at the same time, check the status of the inlet and outlet valves to confirm whether they are in normal working conditions; in addition, it is also necessary to check the status of the connecting pipes to ensure that the pipes are unblocked and leak-free and remain unobstructed;

[0060] Next, it is necessary to check the working status of the backflush system to ensure that the overall system operates normally without faults or abnormalities;

[0061] Finally, it is necessary to carefully check the status of all valves at the inlet and outlet of the backflush system to ensure that each valve is in the correct open or closed state to ensure the accurate operation of the system.

[0062] The module for troubleshooting the accuracy of the action timing sequence of the backflush two-way valve, gas three-way valve and flue gas three-way valve collects the factors affecting the accuracy of the action timing sequence of the backflush two-way valve, gas three-way valve and flue gas three-way valve, and constructs the third troubleshooting data set; the third troubleshooting process guidance document constructed based on the third troubleshooting data set;

[0063] The factors affecting the accuracy of the action timing sequence of the backflush two-way valve, gas three-way valve and flue gas three-way valve include: the action timing sequence of the cylinders on the air intake and smoke exhaust sides of the gas and coal smoke three-way reversing valve, the action timing sequence of the backflush two-way reversing valve and the gas and coal smoke three-way reversing valve, the backflush pressure and time, the action timing sequence of each valve, the response speed of each valve action, the compressed air pressure controlling the cylinder action, and the frequency of the backflush blower.

[0064] In the present invention, the content of the third troubleshooting process guidance document includes the following aspects:

[0065] First, it is necessary to carefully check the action timing sequence of the cylinders on the air intake and smoke exhaust sides of the gas and coal smoke three-way reversing valve to ensure its accuracy;

[0066] Secondly, it is necessary to check the action timing sequence of the backflush two-way reversing valve and the gas and coal smoke three-way reversing valve to ensure that the time coordination between them is accurate;

[0067] Next, it is necessary to check the backflush pressure and backflush time to ensure that they both meet the predetermined accurate standards;

[0068] In addition, the action timing sequence of each valve also needs to be checked to ensure its synchronization and accuracy;

[0069] It is also necessary to check the response speed of each valve action and ensure that the compressed air pressure controlling the cylinder action is accurate. At the same time, check whether there is any problem of internal leakage in the cylinder;

[0070] Finally, check the frequency of the reverse blower to ensure the accuracy of its operating frequency.

[0071] The three-way valve sealing performance troubleshooting module aims to collect and analyze various factors affecting the sealing performance of the three-way valve, and construct a comprehensive fourth troubleshooting data set based on this information. Based on this data set, a detailed fourth troubleshooting process guidance document is further developed to guide technicians in effective troubleshooting and maintenance work.

[0072] Among the factors affecting the sealing performance of the three-way valve, multiple key points can be identified, including the integrity of the sealing ring, whether the compression degree of the valve plate seal is appropriate, whether the clearance between the valve plate of the three-way valve and the valve seat of the box body is within a reasonable range, whether the connection state between the cylinder and the valve stem is stable, whether the sealing performance of the valve plate of the three-way valve meets the standard, whether the compression degree of the valve plate seal meets the design requirements, and whether the airtightness of the valve plate seal is good.

[0073] The fourth troubleshooting process guidance document details the steps for troubleshooting the sealing performance of the three-way valve, specifically including:

[0074] First, check whether there is any damage, looseness or detachment of the sealing ring on the valve plate of the three-way valve to ensure the integrity and functionality of the sealing ring;

[0075] Secondly, check the adjusted position of the lower limit of the cylinder of the three-way valve to confirm whether it is in the correct position. At the same time, evaluate whether the compression degree of the valve plate seal is appropriate, and check whether there is any unreasonable clearance between the valve plate of the three-way valve and the valve seat of the box body;

[0076] Then, conduct a detailed inspection of the connection state between the cylinder and the valve stem to ensure that there is no looseness or damage at the connection part and guarantee the stability of its connection;

[0077] Next, test the sealing performance of the valve plate of the three-way valve to ensure that it can effectively prevent medium leakage;

[0078] In addition, it is also necessary to check the compression degree of the valve plate seal to ensure that it meets the design specifications to guarantee the sealing effect;

[0079] Finally, detect the airtightness of the valve plate seal to ensure that there is no gas leakage, thus guaranteeing the overall sealing performance of the three-way valve.

[0080] A troubleshooting method for the problem of high CO content in the flue gas of a regenerative heating furnace. When the CO content exceeds the threshold, troubleshoot according to the above-mentioned First Troubleshooting Process Guide Document, Second Troubleshooting Process Guide Document, Third Troubleshooting Process Guide Document, and Fourth Troubleshooting Process Guide Document.

[0081] By deeply analyzing various reasons for the increase in flue gas CO content, an accurate troubleshooting plan was formulated accordingly.

[0082] The specific troubleshooting control steps are as follows:

[0083] (1) For the problem of high CO content in the flue gas caused by insufficient combustion of gas in the heating furnace, the present invention conducts a detailed cause analysis and formulates a troubleshooting method.

[0084] Cause analysis: First, large fluctuations in the external network pressure of the gas may cause the gas entering the heating furnace to not obtain enough air for full combustion, resulting in an excessive CO content in the flue gas. This situation will not only cause waste of gas energy in the heating furnace but also lead to an increase in the cost per ton of steel. Second, improper operation by the heating worker, such as excessive adjustment of the opening degree of the regulating valve, may cause the air and gas in a certain section of the heating furnace not to be fully mixed and burned, also resulting in an excessive CO content in the flue gas.

[0085] Troubleshooting method: To ensure full combustion of the gas, it is necessary to adjust the air-fuel ratio of each heating section of the heating furnace to keep it at about 0.9. This can ensure that the gas entering the heating furnace has enough air for full combustion. At the same time, the present invention also needs to observe the oxygen content in the flue gas and control it at about 5%. If the CO content still does not decrease after these adjustments, the present invention will proceed to the next troubleshooting item.

[0086] (2) For the problem of high CO content in the flue gas caused by abnormal operation of the back-blowing system, the present invention also conducts a cause analysis and formulates a troubleshooting method.

[0087] Cause analysis: First, the interlock protection condition may be triggered during the back-blowing process, causing the back-blowing system to automatically stop, resulting in an excessive CO content in the flue gas. Second, the manual valve of the back-blowing system is not opened, which may cause the flue gas after back-blowing to not enter the heating furnace through the regenerator box, resulting in the ineffectiveness of the back-blowing system. Finally, failures in equipment such as the impeller dynamic balance of the back-blowing fan, inlet and outlet valves, and connecting pipes may cause the back-blowing system to not operate stably, thereby reducing the back-blowing effect.

[0088] Troubleshooting method: First, it is necessary to check whether the backflush system is operating normally, confirm the system alarm points, and after eliminating the system faults, put the backflush system function back into operation. Second, carefully check the status of all valves at the inlet and outlet of the backflush system to ensure that all valves are in the open state. Finally, check whether the operating status of the backflush system equipment is normal. If the CO content still does not decrease after these troubleshooting steps, the present invention will proceed to the next troubleshooting item.

[0089] (3) Regarding the problem of high CO content in the flue gas caused by the action timing problem between the backflush two-way valve and the gas / smoke three-way valve, the present invention also conducts a cause analysis and formulates a troubleshooting method.

[0090] Cause analysis: First, the action timing problem between the intake and exhaust cylinders on both sides of the gas and coal smoke three-way reversing valve may cause the connection of the gas and coal smoke pipelines, resulting in an excessive CO content in the coal smoke. Second, when the air three-way reversing valve cannot be opened or its action is slow, it may cause an unreasonable air-fuel ratio in the furnace, incomplete combustion of the gas. Third, the action timing problem between the backflush two-way reversing valve and the gas and coal smoke three-way reversing valve may cause the backflushed flue gas to be directly discharged without entering the furnace, thus reducing the backflush effect. Finally, a low backflush pressure, a short backflush time, and a poor backflush effect will also lead to an excessive CO content in the flue gas.

[0091] Troubleshooting method: First, check the action timing of each valve to ensure the correct action sequence of each valve. Second, check the response speed of each valve's action, check the compressed air pressure for controlling the cylinder action, eliminate the leakage points in the pneumatic system, and check whether there is internal leakage in the cylinder. Finally, adjust the frequency of the backflush blower, increase the backflush pressure, extend the backflush time, and improve the backflush effect. If the CO content still does not decrease after these troubleshooting steps, the present invention will proceed to the next troubleshooting item.

[0092] (4) Regarding the problem of high CO content in the flue gas caused by the poor sealing of the three-way reversing valve, the present invention also conducts a cause analysis and formulates a troubleshooting method.

[0093] Cause analysis: First, when any one of the seals of the valve plates of the gas intake and coal smoke exhaust cylinders in the three-way reversing valve is damaged, it will cause the connection of the gas in the three-way reversing valve body, resulting in the direct discharge of the gas, thus leading to an excessive CO content in the flue gas. When the temperature inside the three-way reversing valve is too high, the sealing ring of the valve plate of the three-way reversing valve will be burned out, resulting in a poor contact between the valve seat and the valve plate. The fit between the valve plate sealing ring and the valve plate groove is not good. When the three-way valve body or the valve plate vibrates, the sealing ring will loosen and fall off, resulting in air leakage. Second, due to the upper adjustment position of the lower limit of the cylinder of the three-way reversing valve being too high, although the valve plate of the three-way reversing valve has been closed, the pressing degree of the valve plate seal is insufficient, and there is a gap between the valve plate of the three-way reversing valve and the valve seat of the valve body, which will also cause poor sealing and air leakage, and this situation will also lead to an excessive CO content in the flue gas.

[0094] Troubleshooting method: First, check the connection between the cylinder and the valve stem to confirm the pressing degree of the sealing ring of the three-way changeover valve plate. Method for confirming the pressing degree of the valve plate seal: Adjust the connection between the cylinder and the valve stem, and observe the change in the CO content of the flue gas. If the CO content decreases significantly, it indicates that there is a gap between the valve plate and the valve seat of the box body. If the CO content does not change significantly, it indicates that there is no gap between the valve plate and the valve seat of the box body, and the pressing of the valve plate seal is normal. Secondly, check the valve plate seal of the three-way changeover valve to confirm its airtightness. Method for confirming the airtightness of the valve plate seal: Close the changeover valve of a certain heating section and observe the change in the CO content of the flue gas. If the CO content does not change significantly, it indicates that the airtightness of the valve plate of this section is normal. If the CO content decreases significantly, it indicates that there is a problem with the valve plate seal of this section, and it is necessary to further confirm which valve plate seal of this heating section has a problem. Open the air-gas changeover valve to manually force air intake, and observe the change in the CO content of the flue gas. If the CO content increases significantly, it indicates that the exhaust valve plate seal is not tight. If the CO content does not change significantly, it indicates that the exhaust valve plate seal is normal. Open the air-smoke coal-smoke changeover valve to manually force exhaust, and observe the change in the CO content of the flue gas. If the CO content increases significantly, it indicates that the gas valve plate seal is not tight. If the CO content does not change significantly, it indicates that the gas valve plate seal is normal.

[0095] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.

Claims

1. A fault diagnosis system for high CO content in the flue gas of a regenerative heating furnace, characterized in that, Including: A module for checking the sufficiency of gas combustion in the heating furnace, which collects factors affecting the sufficiency of gas combustion in the heating furnace and constructs a first fault checking data set; A first checking process guiding document constructed based on the first fault checking data set; A module for checking the accuracy of the input of the backwashing system, which collects factors affecting the accuracy of the input of the backwashing system and constructs a second fault checking data set; A second checking process guiding document constructed based on the second fault checking data set; A module for checking the accuracy of the action timing sequence of the backwashing two-way valve, the gas three-way valve and the flue gas three-way valve, which collects factors affecting the accuracy of the action timing sequence of the backwashing two-way valve, the gas three-way valve and the flue gas three-way valve and constructs a third fault checking data set; A third checking process guiding document constructed based on the third fault checking data set; A module for checking the sealing performance of the three-way reversing valve, which collects factors affecting the sealing performance of the three-way reversing valve and constructs a fourth fault checking data set, and a fourth checking process guiding document constructed based on the fourth fault checking data set.

2. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 1, wherein The factors affecting the sufficiency of gas combustion in the heating furnace include: the magnitude of the gas network pressure fluctuation outside the heating furnace, the accuracy of the heating worker's operation, the air-fuel ratio of the heating furnace, and the oxygen content in the flue gas.

3. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 2, characterized in that, The first checking process guiding document includes: Checking whether the magnitude of the gas network pressure fluctuation outside the heating furnace is within the preset range; Checking whether the operation of the heating worker is accurate; Checking whether the air-fuel ratio of the heating furnace is within the preset range; Checking whether the oxygen content in the flue gas is within the preset range; where: The preset range of the air-fuel ratio of the heating furnace is 0.85 - 0.95, and the preset range of the oxygen content in the flue gas is 4.5% - 5.5%.

4. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 1, wherein, The factors affecting the accuracy of the input of the backwashing system include: triggering the interlock protection condition, the dynamic balance of the backwashing blower impeller, the states of the inlet and outlet valves, the state of the connecting pipeline, the working state of the backwashing system, and the states of all valves at the inlet and outlet of the backwashing system.

5. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 4, characterized in that, The second checking process guiding document includes: Checking whether the triggering of the interlock protection condition is accurate; Checking whether the dynamic balance of the backwashing blower impeller, the states of the inlet and outlet valves, and the state of the connecting pipeline are normal; Checking whether the working state of the backwashing system is normal; Checking whether the states of all valves at the inlet and outlet of the backwashing system are normal.

6. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 1, wherein, The factors affecting the accuracy of the action timing sequence of the backwashing two-way valve, the gas three-way valve and the flue gas three-way valve include: the action timing sequence of the cylinders on the gas and smoke sides of the gas and smoke three-way reversing valve, the action timing sequence of the backwashing two-way reversing valve and the gas and smoke three-way reversing valve, the backwashing pressure and time, the action timing sequence of each valve, the response speed of each valve action, the compressed air pressure for controlling the cylinder action, and the backwashing blower frequency.

7. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 6, wherein, The third checking process guiding document includes: Checking whether the action timing sequence of the cylinders on the gas and smoke sides of the gas and smoke three-way reversing valve is accurate; Checking whether the action timing sequence of the backwashing two-way reversing valve and the gas and smoke three-way reversing valve is accurate; Checking whether the backwashing pressure and backwashing time are accurate; Checking whether the action timing sequence of each valve is accurate; Checking whether the response speed of each valve action and the compressed air pressure for controlling the cylinder action are accurate; checking whether there is internal leakage in the cylinder; Checking whether the backwashing blower frequency is accurate.

8. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 1, characterized in that, The factors affecting the sealing performance of the three-way reversing valve include: the sealing ring, the compression degree of the valve plate seal, the gap between the valve plate of the three-way reversing valve and the valve seat of the valve body, the connection state between the cylinder and the valve stem, the sealing performance of the valve plate of the three-way reversing valve, the compression degree of the valve plate seal, and the airtightness of the valve plate seal.

9. The troubleshooting system for the high CO content in the flue gas of the regenerative heating furnace according to claim 8, wherein, The fourth troubleshooting process instruction document includes: Check whether the sealing ring of the valve plate of the three-way reversing valve is damaged, loose or fallen off; Check whether the lower limit adjustment position of the cylinder of the three-way reversing valve is too high, the compression degree of the valve plate seal, and whether there is a gap between the valve plate of the three-way reversing valve and the valve seat of the valve body; Check the connection between the cylinder and the valve stem; Check the sealing performance of the valve plate of the three-way reversing valve; Check the compression degree of the valve plate seal; Check the airtightness of the valve plate seal.

10. A troubleshooting method for the high CO content in the flue gas of a regenerative heating furnace, characterized in that, When the CO content exceeds the threshold, perform fault troubleshooting according to the first troubleshooting process instruction document, the second troubleshooting process instruction document, the third troubleshooting process instruction document, and the fourth troubleshooting process instruction document described in any one of claims 1-9.