Boiler soot blowing control method and device

Abstract

The invention provides a boiler soot blowing control method and device. When a soot blower is in a standby state, the highest smoke temperature of an area where a target soot blower is located is obtained, target poppet downstream pressure is obtained according to the highest smoke temperature and the material of the target soot blower, and target reheat steam cold section pressure is obtained according to the target poppet downstream pressure; and according to the actual reheat steam cold section pressure and the target reheat steam cold section pressure, whether a soot blower can be used or not is decided. And if the target soot blower can be put into use and has been put into use, monitoring the post-valve pressure of the target soot blower in real time, and evaluating whether the operation process of the target soot blower is safe or not. According to the method, the minimum reheat steam cold section pressure safety value is obtained according to the maximum smoke temperature of the soot blower under the current working condition, so that the safety after the soot blower is put into the target soot blower is evaluated before the target soot blower is put into the target soot blower; in the variable load process after the target soot blower is put into use, whether the soot blower can operate safely or not can be monitored in real time, so that the operation safety of the soot blower before and after the target soot blower is put into use can be evaluated.

Description

Technical Field

[0001] The present application relates to the technical field of boilers, and in particular to a boiler sootblowing control method and device. Background Art

[0002] During boiler operation, ash and slagging are inevitably deposited on the heating surfaces of the boiler, affecting boiler efficiency and posing a safety hazard. Therefore, sootblowers are typically installed to purge and clean the heating surfaces. To ensure sootblower safety, each sootblower is designed with a pressure behind the poppet valve based on the design flue gas temperature at full load. During the actual sootblowing process, one or two sootblowing steam main pressures are first predetermined based on the sootblower area. Then, by adjusting the poppet valves of each sootblower, the pressure behind the poppet valve of each sootblower meets the minimum pressure behind the poppet valve at full load, ensuring safe operation of the sootblowers under all operating conditions.

[0003] However, during actual operation, the load of the generator set does not always run at full load, but rather is less than full load and fluctuates. When the load of the generator set drops below 50% of the rated load, the pressure in the cold section of the reheat steam decreases. After throttling and reducing the pressure through the main pipe pressure regulating valve and the poppet valve, the actual pressure behind the poppet valve is less than the designed minimum pressure behind the poppet valve at full load. This makes it impossible to determine whether the soot blower is safe after it is put into operation, resulting in the soot blower being unable to blow soot. Especially when the generator set is in deep peak regulation, the load of the generator set is generally 30%-40%, or even less than 30%. At this time, the pressure in the cold section of the reheat steam is even lower, resulting in an even lower actual pressure behind the poppet valve. Therefore, when the soot blower is operated based on the minimum pressure behind the poppet valve at full load as the judgment standard, some boiler heating surfaces will be unable to perform soot blowing for a long time.

[0004] When the generator set is in deep peak regulation, due to the low load, the boiler produces less flue gas and the flue gas flow rate is correspondingly reduced, which accelerates the ash accumulation rate in the horizontal flue and tail flue of the boiler. At this time, the soot blower cannot blow soot for a long time, resulting in a large amount of fly ash accumulation on the heating surface of the boiler, affecting the load-bearing safety of the boiler and the heat exchange efficiency of the heating surface, further leading to a decrease in boiler efficiency, an increase in exhaust gas temperature, overheating of the heating surface, and even abnormal events caused by large coke falling from the boiler. Summary of the Invention

[0005] The present application provides a boiler sootblowing control method and device, which are used to solve the problem that the sootblower cannot perform sootblowing for a long time when the load of the generator set is reduced, especially when participating in deep peak regulation.

[0006] In a first aspect, the present application provides a boiler sootblowing control method, which is applied to a boiler sootblowing system. The boiler sootblowing system includes: a target sootblower, a poppet valve, a sootblowing steam main pipe, a steam pressure regulating valve, and a reheat steam cold section pipe. When the sootblower is in any working state, the poppet valve is in a fully open state. The operating state includes: a standby state and an operating state. The method includes: When the target sootblower is in a standby state, obtaining a first maximum flue gas temperature of an area where the target sootblower is located corresponding to a first current operating condition; Obtaining a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower; Obtaining a first target sootblowing steam main pipe pressure according to the first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; determining a target reheat steam cold-section pressure according to a first target sootblowing steam main pipe pressure and a second corresponding relationship between the sootblowing steam main pipe pressure and the reheat steam cold-section pressure established when the steam pressure regulating valve is at a preset opening value; Obtaining an actual reheat steam cold-section pressure corresponding to a reheat steam cold-section pipeline corresponding to the first current operating condition; Whether the target sootblower can be put into operation is determined according to the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure.

[0007] Optionally, the method further includes: When the target sootblower is in operation, periodically obtaining a second maximum flue gas temperature of the area where the target sootblower is located corresponding to a second current operating condition; Obtaining a second target poppet valve downstream pressure corresponding to the poppet valve according to the second maximum flue gas temperature and the material of the target sootblower; Obtaining a second target sootblowing steam main pipe pressure according to the second target pressure after the lift valve and the first corresponding relationship; Obtaining an actual sootblowing steam main pipe pressure corresponding to the second current operating condition; It is determined whether the target sootblower can continue to be in an operating state according to the actual sootblowing steam main pipe pressure and the second target sootblowing steam main pipe pressure.

[0008] Optionally, obtaining a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower includes: determining, according to the material of the target sootblower, a third corresponding relationship between the flue gas temperature and the steam cooling flow rate in the area where the target sootblower is located; determining a target steam cooling flow rate according to the first maximum flue gas temperature and the third corresponding relationship; The first target pressure after the poppet valve is obtained according to the target steam cooling flow rate.

[0009] Optionally, obtaining a first maximum flue gas temperature in a region where the target sootblower is located corresponding to the first current operating condition includes: Obtaining a flue gas temperature corresponding to a preset area under the first current operating condition, where the preset area is an area where a sootblower equipped with a temperature measuring device is located; The first maximum flue gas temperature of the area where the target sootblower is located is determined according to the flue gas temperature gradient table, the flue gas temperature corresponding to the preset area, and the area where the target sootblower is located.

[0010] Optionally, before obtaining the first target sootblowing steam main pipe pressure according to the first target poppet valve downstream pressure and the first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe, the method further includes: When the poppet valve is in a fully open state, dynamically adjusting the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; After each dynamic adjustment, obtaining the post-lift valve pressure corresponding to the lift valve; The first corresponding relationship is established according to the pressure after the poppet valve corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe obtained after each dynamic adjustment during the dynamic adjustment process.

[0011] Optionally, the determining whether the target sootblower can be put into operation according to the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure includes: When the actual reheat steam cold section pressure is less than the target reheat steam cold section pressure, determining that the target soot blower is prohibited from being put into operation; When the actual reheat steam cold-section pressure is greater than or equal to the target reheat steam cold-section pressure, it is determined that the target sootblower can be put into operation.

[0012] Optionally, the method further includes: The opening of the steam pressure regulating valve is controlled according to the actual sootblowing steam main pipe pressure and a preset sootblowing steam main pipe pressure to adjust the current sootblowing steam main pipe pressure, wherein the preset sootblowing steam main pipe pressure is the sootblowing steam main pipe pressure corresponding to when the boiler is operating at full load.

[0013] In a second aspect, the present application provides a boiler sootblowing control device, which is applied to a boiler sootblowing system. The boiler sootblowing system includes: a target sootblower, a poppet valve, a sootblowing steam main pipe, a steam pressure regulating valve, and a reheat steam cold section pipeline. When the sootblower is in an operating state, the poppet valve is in a fully open state. The operating state includes: a standby state and an operating state. The device includes: an acquisition module, configured to acquire, when the target sootblower is in a standby state, a first maximum flue gas temperature of an area where the target sootblower is located, corresponding to a first current operating condition; a processing module, configured to obtain a first target poppet valve rear pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower; and to obtain a first target sootblowing steam main pipe pressure according to the first target poppet valve rear pressure and a first correspondence between the poppet valve rear pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; and to determine a target reheat steam cold-section pressure according to the first target sootblowing steam main pipe pressure and a second correspondence between the sootblowing steam main pipe pressure and the reheat steam cold-section pressure established when the steam pressure regulating valve is at a preset opening value; The acquisition module is further configured to obtain an actual reheat steam cold-segment pressure corresponding to the reheat steam cold-segment pipeline corresponding to the first current operating condition; The control module is used to decide whether the target sootblower can be put into use according to the actual reheat steam cold section pressure and the target reheat steam cold section pressure.

[0014] Optionally, the acquisition module is further configured to periodically acquire a second maximum flue gas temperature in the area where the target sootblower is located, corresponding to a second current operating condition, when the target sootblower is in an operating state; The processing module is further configured to obtain a second target lift valve downstream pressure corresponding to the lift valve based on the second maximum flue gas temperature and the material of the target sootblower; and to obtain a second target sootblowing steam main pipe pressure based on the second target lift valve downstream pressure and the first corresponding relationship; The acquisition module is further configured to acquire an actual sootblowing steam main pipe pressure corresponding to the second current operating condition; The control module is further configured to determine whether the target sootblower can continue to operate according to the actual sootblowing steam main pipe pressure and the second target sootblowing steam main pipe pressure.

[0015] Optionally, the processing module obtains a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower, specifically for: determining, according to the material of the target sootblower, a third corresponding relationship between the flue gas temperature and the steam cooling flow rate in the area where the target sootblower is located; determining a target steam cooling flow rate according to the first maximum flue gas temperature and the third corresponding relationship; The first target pressure after the poppet valve is obtained according to the target steam cooling flow rate.

[0016] Optionally, the acquisition module is configured to obtain a first maximum flue gas temperature in the area where the target sootblower is located, corresponding to the first current operating condition, by: Obtaining a flue gas temperature corresponding to a preset area under the first current operating condition, where the preset area is an area where a sootblower equipped with a temperature measuring device is located; The first maximum flue gas temperature of the area where the target sootblower is located is determined according to the flue gas temperature gradient table, the flue gas temperature corresponding to the preset area, and the area where the target sootblower is located.

[0017] Optionally, the device further includes: a debugging module; The debugging module is configured, before the processing module obtains the first target sootblowing steam main pipe pressure based on the first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe: When the poppet valve is in a fully open state, dynamically adjusting the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; After each dynamic adjustment, obtaining the post-lift valve pressure corresponding to the lift valve; The first corresponding relationship is established according to the pressure after the poppet valve corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe obtained after each dynamic adjustment during the dynamic adjustment process.

[0018] Optionally, the control module decides whether the target sootblower can be put into operation based on the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure, specifically for: When the actual reheat steam cold section pressure is less than the target reheat steam cold section pressure, determining that the target soot blower is prohibited from being put into operation; When the actual reheat steam cold-section pressure is greater than or equal to the target reheat steam cold-section pressure, it is determined that the target sootblower can be put into operation.

[0019] Optionally, the control module is also used to: control the opening of the steam pressure regulating valve according to the actual sootblowing steam main pipe pressure and the preset sootblowing steam main pipe pressure to adjust the current sootblowing steam main pipe pressure, and the preset sootblowing steam main pipe pressure is the sootblowing steam main pipe pressure corresponding to when the boiler is operating at full load.

[0020] In a third aspect, the present application provides an electronic device, comprising: a processor and a memory; Memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method as described in any one of the first aspects.

[0021] In a fourth aspect, an embodiment of the present application provides a readable storage medium, including a program or instruction. When the program or instruction runs on a computer, the method described in any one of the above-mentioned first aspects is executed.

[0022] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which, when executed by a processor, implements the method as described in any one of the first aspects.

[0023] The boiler sootblowing control method and device provided in the present application, when the sootblower is in a standby state, obtains a first maximum flue gas temperature corresponding to the target sootblower's area under a first current operating condition, obtains a first target lift valve downstream pressure corresponding to the lift valve based on the first maximum flue gas temperature and the material of the target sootblower, obtains a first target sootblowing steam main pipe pressure based on the first target lift valve downstream pressure and a first corresponding relationship; determines a target reheat steam cold section pressure based on the first target sootblowing steam main pipe pressure and a second corresponding relationship; obtains an actual reheat steam cold section pressure corresponding to the reheat steam cold section pipeline corresponding to the first current operating condition; and determines whether the target sootblower can be put into operation based on the actual reheat steam cold section pressure and the target reheat steam cold section pressure. This embodiment controls whether the sootblower is put into operation or not by determining the target reheat steam cold section pressure based on the first maximum flue gas temperature when the sootblower is in a standby state, providing a judgment method for safely putting the sootblower into operation under different operating conditions, so that the sootblower can safely blow soot after being put into operation, thereby increasing the sootblowing time of the sootblower during load changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 A flow chart of a boiler sootblowing control method provided in one embodiment of the present application; Figure 2 A flow chart of a boiler sootblowing control method provided in another embodiment of the present application; Figure 3A flowchart of a method for obtaining a first correspondence relationship provided in an embodiment of the present application; Figure 4 A schematic structural diagram of a boiler sootblowing control device provided in one embodiment of the present application; Figure 5 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0027] During the operation of the boiler, it is inevitable that ash and slagging will accumulate on the heating surfaces, which will affect the efficiency of the boiler and pose a safety hazard. Therefore, sootblowers are generally installed to purge the heating surfaces to achieve the purpose of cleaning the heating surfaces. Among them, the sootblowers will correspond to a pressure requirement value after the sootblowing steam source pressure regulating valve when sootblowing, that is, the minimum pressure after the lifting valve, to ensure the steam cooling flow in the pipe when the sootblowers blow soot, thereby ensuring the safety of the sootblowers and the purge effect of the sootblowers. Generally, to ensure the safety of the sootblowers, the minimum pressure after the lifting valve is set according to the design flue gas temperature at full load at the location of each sootblowers. Therefore, in actual operation, the minimum pressure after the lifting valve at full load is used as the judgment standard. When the actual pressure after the lifting valve is greater than the minimum pressure after the lifting valve, the sootblowers can perform sootblowing.

[0028] However, in actual operation, the load of the generator set does not always run at full load, but is less than full load and changes. When the load of the generator set decreases, the pressure of the cold section of the reheat steam decreases. After throttling and reducing the pressure through the main pipe pressure regulating valve and the lifting valve, the actual pressure behind the lifting valve is often less than the minimum pressure behind the lifting valve, which cannot reach the pressure requirement value for the soot blower to blow soot safely, resulting in the soot blower being unable to blow soot.

[0029] Especially when the generator set is in deep peak regulation, the load of the generator set is generally 30%-40%, or even lower than 30%. At this time, the pressure of the reheat steam cold section is even lower, resulting in an even lower actual pressure behind the poppet valve. Therefore, when the soot blower is operated based on the minimum pressure behind the poppet valve at full load, the soot blower will be unable to blow soot for a long time. When the generator set is in deep peak regulation, due to the low load, the boiler produces less flue gas, and the flue gas flow rate is correspondingly reduced, which accelerates the soot accumulation rate in the horizontal flue and tail flue of the boiler. At this time, the soot blower is unable to blow soot for a long time, resulting in a large amount of slag lumps accumulating on the boiler heating surface, affecting the boiler's load-bearing safety and the heat exchange efficiency of the heating surface, further leading to a decrease in boiler efficiency, an increase in exhaust gas temperature, overheating of the heating surface, and even abnormal events caused by the loss of large coke in the boiler.

[0030] Therefore, to address the technical problems encountered in the prior art, the present application proposes a boiler sootblowing control method and device. When the sootblower is operating, the load of the generator set changes, causing the boiler's operating conditions to change accordingly. This, in turn, causes the flue gas temperature in the area where the sootblower is located to change. Different flue gas temperatures require different steam cooling flows, which in turn, result in different minimum post-poppet valve pressures. Therefore, the corresponding minimum post-poppet valve pressure is determined by the highest flue gas temperature in the sootblower's area under different operating conditions. This minimum post-poppet valve pressure corresponds to the poppet valve opening controlled in the prior art. In the present application, however, since the poppet valve is fully open, the post-poppet valve pressure cannot be adjusted using the poppet valve. Instead, the post-poppet valve pressure can be adjusted using the steam pressure regulating valve associated with the sootblowing steam main pipe. Therefore, the corresponding relationship between the post-poppet valve pressure and the sootblowing steam main pipe pressure is used to determine the minimum post-poppet valve pressure, thereby determining the minimum reheat steam cold-stage pressure. The actual reheat steam cold-stage pressure under the current operating conditions is then compared with the minimum reheat steam cold-stage pressure to control the sootblower's operating status. In this way, a corresponding minimum pressure behind the lifting valve can be designed according to the maximum flue gas temperature in the area where the soot blower is located under different boiler operating conditions. Since the minimum pressure behind the lifting valve is lower than the minimum pressure behind the lifting valve corresponding to the flue gas temperature at full load, the problem of the soot blower being unable to blow soot for a long time under different operating conditions is avoided, thereby ensuring the efficiency and safety of the boiler.

[0031] Figure 1 This is a flow chart of a boiler sootblowing control method provided in one embodiment of the present application. Figure 1The method can be implemented by a boiler control system and applied to a boiler sootblowing system to control sootblowing by a sootblower. The boiler sootblowing system includes a sootblower, a poppet valve, a sootblowing steam header, a steam pressure regulating valve, and a reheat steam cold section pipeline. In this boiler sootblowing system, the poppet valve is continuously fully open, i.e., fully open when the sootblower is in both standby and operating states. This fully open state reduces throttling losses and broadens the load range within which sootblowing can occur, allowing the sootblower to continue blowing even at low loads.

[0032] like Figure 1 As shown, the method includes: S101 : When a sootblower is in a standby state, obtaining a first maximum flue gas temperature in an area where a target sootblower is located, corresponding to a first current operating condition.

[0033] In this step, any sootblower in the boiler is used as a target sootblower, wherein the target sootblower is mostly a long sootblower.

[0034] When the target sootblower is in the standby state, it is necessary to determine whether the target sootblower meets the conditions for commissioning under the first current operating condition. Whether the target sootblower meets the conditions for commissioning is primarily related to the flue gas temperature in the area where it is located. Depending on the location of the target sootblower, the corresponding flue gas temperature will vary. Therefore, this embodiment independently controls each sootblower in the boiler. Specifically, for each sootblower, the highest flue gas temperature corresponding to the target sootblower, i.e., the first highest flue gas temperature, is obtained.

[0035] It should be noted that the maximum flue gas temperature mentioned here is not the absolute maximum flue gas temperature. Generally, multiple temperature measuring devices are set in the area where the target soot blower is located, and the highest temperature measured by the multiple temperature measuring devices is selected as the maximum flue gas temperature of the target soot blower.

[0036] Optionally, one implementation of S101 is: S1011. Obtain smoke temperature corresponding to a preset area under a first current working condition.

[0037] The preset area is the area where the soot blower with the temperature measuring device is located.

[0038] Specifically, installing a temperature measuring device in the area where each sootblower is located to measure its maximum flue gas temperature is costly. Furthermore, flue gas temperature varies substantially regularly along the flue gas flow path. Therefore, to reduce the number of temperature measuring devices and lower costs, at least one sootblower is pre-selected from the multiple sootblowers corresponding to the boiler. For each selected sootblower, multiple temperature measuring devices are installed in the area where it is located to measure the corresponding flue gas temperature, generally the maximum flue gas temperature. The area where the selected sootblower is located is referred to as the pre-set area.

[0039] S1012: Determine a first maximum flue gas temperature in the area where the target sootblower is located according to the flue gas temperature gradient table, the flue gas temperature corresponding to the preset area, and the area where the target sootblower is located.

[0040] Specifically, the flue gas temperature gradient table is a correlation table between the maximum temperatures of sootblowers in different areas corresponding to the boiler. It is provided by the boiler manufacturer, and a flue gas temperature gradient table corresponds to each operating condition of the boiler. In this way, based on the known maximum flue gas temperatures of other sootblowers, the maximum flue gas temperature of the area where the target sootblowers are located can be obtained according to the flue gas temperature gradient table corresponding to the first current operating condition.

[0041] S102: Obtain a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower.

[0042] In this step, the higher the flue gas temperature of the target sootblower, the greater the corresponding pressure behind the lifting valve; the greater the heat resistance of the material of the target sootblower, the smaller the corresponding pressure behind the lifting valve. Therefore, in the prior art, based on the maximum flue gas temperature and the material of the target sootblower, the target pressure behind the lifting valve that can enable the target sootblower to blow soot safely is obtained, which is recorded here as the first target pressure behind the lifting valve. The first target pressure behind the lifting valve is the minimum pressure behind the lifting valve to ensure the safe sootblowing of the target sootblower.

[0043] Optionally, one implementation of S102 is: S1021. Determine a third corresponding relationship between the flue gas temperature and the steam cooling flow rate in the area where the target sootblower is located according to the material of the target sootblower.

[0044] Specifically, the target sootblower is made of different materials and has different heat resistance, resulting in different steam cooling flow rates required at the same flue gas temperature. Therefore, the relationship between flue gas temperature and steam cooling flow rate is related to the target sootblower's material. Therefore, the corresponding relationship between flue gas temperature and steam cooling flow rate, i.e., the third corresponding relationship, is determined based on the target sootblower's material. This third corresponding relationship is generally provided by the boiler manufacturer.

[0045] S1022. Determine a target steam cooling flow rate based on the maximum flue gas temperature and the third corresponding relationship.

[0046] Specifically, after the third corresponding relationship is obtained, the target steam cooling flow rate can be directly determined according to the maximum flue gas temperature and the third corresponding relationship.

[0047] S1023. Obtain a first target pressure after the poppet valve according to the target steam cooling flow rate.

[0048] Specifically, the steam cooling flow is related to the pressure behind the poppet valve. The greater the steam cooling flow, the greater the pressure behind the poppet valve. Therefore, when the target steam cooling flow is determined, the first target pressure behind the poppet valve can be obtained, and the first target pressure behind the poppet valve is the minimum pressure behind the poppet valve.

[0049] S103 , obtaining a first target sootblowing steam main pipe pressure according to a first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe.

[0050] In this step, the first corresponding relationship is the corresponding relationship between the pressure after the poppet valve and the sootblowing steam main pipe pressure obtained by debugging when the poppet valve is fully open. For specific debugging methods, refer to Figure 3 The illustrated embodiment is not described in detail here.

[0051] According to the first target pressure after the lifting valve, the first target sootblowing steam main pipe pressure is obtained by comparing with the first corresponding relationship, wherein the first target sootblowing steam main pipe pressure is also the minimum sootblowing steam main pipe pressure, which is the sootblowing steam main pipe pressure to ensure safe sootblowing of the sootblower.

[0052] S104. Determine a target reheat steam cold-section pressure based on the first target sootblowing steam main pipe pressure and a second corresponding relationship between the sootblowing steam main pipe pressure and the reheat steam cold-section pressure when the steam pressure regulating valve is at a preset opening value.

[0053] In this step, when the sootblowers are in standby mode, the steam in the sootblowing steam main pipe is essentially stationary. Therefore, it is difficult to determine whether the sootblowers can be put into operation based on the sootblowing steam main pipe pressure. However, the steam in the sootblowing steam main pipe is provided by the reheat steam cold-end pipeline. In other words, the sootblowing steam main pipe pressure is related to the reheat steam cold-end pressure. Therefore, when the sootblowers are in standby mode, the reheat steam cold-end pressure can be used to determine whether the sootblowers can be put into operation.

[0054] The second corresponding relationship is established in advance through debugging. Specifically, the opening of the steam pressure regulating valve is set to a preset opening value. For example, when the opening of the steam pressure regulating valve is 80%, the relationship between the sootblowing steam main pipe pressure and the reheat steam cold section pressure is established through debugging. In this way, after the first target sootblowing steam main pipe pressure is known, the target reheat steam cold section pressure can be obtained according to the second corresponding relationship. This target reheat steam cold section pressure is the minimum reheat steam cold section pressure that can enable safe sootblowing after the sootblower is put into operation.

[0055] S105: Obtain the actual reheat steam cold-section pressure corresponding to the reheat steam cold-section pipeline under the first current operating condition.

[0056] In this step, the actual reheat steam cold section pressure is obtained by real-time measurement under the first current operating condition, for example, by detection through a pressure gauge.

[0057] S106. Determine whether the target sootblower can be put into operation based on the actual reheat steam cold section pressure and the target reheat steam cold section pressure.

[0058] In this step, when the sootblower is in the standby state, the target reheat steam cold-section pressure is the minimum reheat steam cold-section pressure that ensures it can be safely put into operation and safely operate after being put into operation. Therefore, based on the comparison result of the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure, it can be determined whether the sootblower can be safely put into operation and safely operate. Therefore, if the comparison result determines that the sootblower cannot be safely put into operation or cannot safely operate after being put into operation, it means that the sootblower cannot be switched to the operating state at this time and needs to remain in the standby state. If the comparison result determines that the sootblower can be safely put into operation and safely operate, it means that the sootblower can be switched to the operating state at this time, so that the staff can determine whether the conditions for putting the sootblower into operation are met based on the comparison result.

[0059] Optionally, when the actual reheat steam cold section pressure is lower than the target reheat steam cold section pressure, it is determined that the target soot blower is still in the standby state, and the target soot blower is prohibited from being put into operation; when the actual reheat steam cold section pressure is greater than or equal to the target reheat steam cold section pressure, it is determined that the target soot blower can be put into operation, and the standby state is switched to the operating state.

[0060] In this embodiment, when a sootblower is in a standby state, a first maximum flue gas temperature corresponding to the target sootblower's location under a first current operating condition is obtained. A first target poppet valve downstream pressure corresponding to the poppet valve is obtained based on the first maximum flue gas temperature and the material of the target sootblower. A first target sootblowing steam main pipe pressure is obtained based on the first target poppet valve downstream pressure and a first correspondence. A target reheat steam cold-section pressure is determined based on the first target sootblowing steam main pipe pressure and a second correspondence. The actual reheat steam cold-section pressure corresponding to the reheat steam cold-section pipeline under the first current operating condition is obtained. A decision is made based on the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure to determine whether the target sootblower can be put into operation. This embodiment determines the target reheat steam cold-section pressure based on the first maximum flue gas temperature when the sootblower is in a standby state, thereby determining whether the sootblower currently meets the conditions for safe operation, allowing personnel to make a decision. This provides a method for determining the safe operation of the sootblower under different operating conditions, ensuring that the sootblower can safely blow soot after being put into operation, thereby increasing the sootblowing time of the sootblower during load changes.

[0061] Figure 2 This is a flow chart of a boiler soot blowing control method provided by another embodiment of the present application. Based on the above embodiment, Figure 2 As shown, the method further includes: S201 : When a target sootblower is in operation, periodically obtain a second maximum flue gas temperature in a region where the target sootblower is located, corresponding to a second current operating condition.

[0062] In this step, while the target sootblowers are in operation (i.e., while the sootblowers are blowing soot), the load of the generator set and the operating conditions of the boiler change. For example, when the load of the generator set decreases, the required thermal load also decreases, and the corresponding boiler flue gas temperature decreases, causing the flue gas temperature in the area of ​​the target sootblowers to also decrease. Consequently, the steam cooling flow rate required by the target sootblowers also decreases. Therefore, while the target sootblowers are in operation, it is necessary to periodically obtain the corresponding second maximum flue gas temperature.

[0063] The second current operating condition refers to the operating condition of the boiler when the target sootblower is blowing soot.

[0064] It should be noted again that the second highest flue gas temperature here is not the absolute highest flue gas temperature. Generally, multiple temperature measuring devices are set in the area where the target soot blower is located, and the highest temperature measured by the multiple temperature measuring devices is selected as the highest flue gas temperature of the target soot blower.

[0065] Among them, the load of the generator set corresponding to the second current operating condition and the first current operating condition can be the same or different, that is, the operating conditions of the corresponding boilers can be the same or different, which is used to distinguish the operating conditions of the boilers corresponding to the target soot blower being in the standby state and the operating state respectively.

[0066] S202: Obtain a second target poppet valve downstream pressure corresponding to the poppet valve according to the second maximum flue gas temperature and the material of the target sootblower.

[0067] In this step, the higher the flue gas temperature of the target sootblower, the greater the corresponding pressure after the valve lift; the greater the heat resistance of the material of the target sootblower, the smaller the corresponding pressure after the valve lift. Therefore, in the prior art, the target pressure after the valve lift that enables the target sootblower to blow soot safely is obtained based on the maximum flue gas temperature and the material of the target sootblower.

[0068] S203 , obtaining a second target sootblowing steam main pipe pressure according to the second target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe.

[0069] In this step, the second target sootblowing steam main pipe pressure is obtained according to the second target pressure after the lifting valve and compared with the first corresponding relationship, wherein the second target sootblowing steam main pipe pressure is the minimum sootblowing steam main pipe pressure corresponding to when the target sootblower is in the operating state, and is the minimum sootblowing steam main pipe pressure to ensure safe sootblowing of the sootblower.

[0070] S204: Obtain the actual sootblowing steam main pipe pressure corresponding to the second current operating condition.

[0071] In this step, the actual sootblowing steam main pipe pressure is the actual sootblowing steam main pipe pressure of the sootblowing steam main pipe measured in real time under the second current working condition. The actual sootblowing steam main pipe pressure can be adjusted by a steam pressure regulating valve on the sootblowing steam main pipe.

[0072] For example, in some embodiments, the opening of the steam pressure regulating valve is controlled according to the actual sootblowing steam main pressure and the preset sootblowing steam main pressure to adjust the actual sootblowing steam main pressure. The preset sootblowing steam main pressure is the target sootblowing steam main pressure corresponding to when the boiler is operating at full load.

[0073] The actual sootblowing steam main pipe pressure here is the sootblowing steam main pipe pressure obtained by real-time measurement when the boiler is in any operating condition.

[0074] The preset sootblowing steam main pressure is the target sootblowing steam main pressure when the generator set is running at full load, that is, the boiler is running at full load, that is, the minimum sootblowing steam main pressure corresponding to the boiler running at full load. It is the minimum sootblowing steam main pressure to ensure safe sootblowing of the sootblower when the generator set is running at full load.

[0075] When the sootblower is blowing soot, the load of the generator set will change, causing the steam pressure of the reheat steam cold-end pipe to change. This will cause the pressure of the sootblowing steam main pipe to change, affecting the operation of the sootblower. For example, if the steam pressure of the reheat steam cold-end pipe decreases due to a decrease in the load of the generator set, the pressure of the sootblowing steam main pipe will decrease. In other words, the current sootblowing steam main pipe pressure will decrease, so that the current sootblowing steam main pipe pressure will not reach the sootblowing steam main pipe pressure that allows the sootblower to blow soot safely.

[0076] Therefore, it is necessary to control the opening of the steam pressure regulating valve according to the actual sootblowing steam main pressure and the preset sootblowing steam main pressure, so that the adjusted sootblowing steam main pressure is as close to the preset sootblowing steam main pressure as possible. Since the preset sootblowing steam main pressure is the target sootblowing steam main pressure when the generator set is operating at full load, that is, when the boiler is operating at full load, the target sootblowing steam main pressure corresponding to non-full load operation is definitely lower than the preset sootblowing steam main pressure. Therefore, there is a high probability that the adjusted sootblowing steam main pressure is higher than the target sootblowing steam main pressure corresponding to non-full load operation, thereby making the sootblower blow as much soot as possible and extending the sootblowing time.

[0077] S205: Determine whether the target sootblower can continue to operate according to the actual sootblowing steam main pipe pressure and the target sootblowing steam main pipe pressure.

[0078] In this step, when the sootblower is blowing soot, the target sootblowing steam main pipe pressure is the minimum sootblowing steam main pipe pressure to ensure its safe sootblowing. Therefore, based on the comparison result of the current sootblowing steam main pipe pressure and the target sootblowing steam main pipe pressure, it can be known whether the sootblower can continue to blow soot safely. When the sootblower cannot blow soot safely, the sootblower is controlled to exit and be in a standby state; when the sootblower can blow soot safely, the sootblower is controlled to continue blowing soot and be in an operating state.

[0079] Optionally, when the actual sootblowing steam main pipe pressure is lower than the target sootblowing steam main pipe pressure, the target sootblower is controlled to exit; when the actual sootblowing steam main pipe pressure is higher than or equal to the target sootblowing steam main pipe pressure, the target sootblower is controlled to continue to operate.

[0080] Optionally, after S202 obtains the second target pressure behind the poppet valve, the pressure of the poppet valve can also be directly measured by a pressure measuring device, that is, the actual pressure behind the poppet valve is measured, and the second target pressure behind the poppet valve is compared with the actual pressure behind the poppet valve. When the actual pressure behind the poppet valve is less than the second target pressure behind the poppet valve, the target soot blower is controlled to exit; when the actual pressure behind the poppet valve is greater than or equal to the second target pressure behind the poppet valve, the target soot blower is controlled to continue to operate.

[0081] Optionally, when the soot blower is in operation, it may be further determined whether the soot blower can continue to operate by increasing the pressure after the valve. In this case, after S202, the method further includes: S206: Obtain the actual pressure after the poppet valve corresponding to the second current working condition.

[0082] Specifically, a device capable of detecting fluid pressure, such as a pressure sensor, is installed on the poppet valve, and when the sootblower is in the second current working condition, the actual pressure after the poppet valve corresponding to the poppet valve is detected in real time.

[0083] S207: Determine whether the target sootblower can continue to operate according to the actual pressure after the poppet valve and the second target pressure after the poppet valve.

[0084] Specifically, when the actual pressure behind the poppet valve is less than the second target pressure behind the poppet valve, the target sootblower is controlled to exit; when the actual pressure behind the poppet valve is greater than or equal to the second target pressure behind the poppet valve, the target sootblower is controlled to continue operating.

[0085] The actual pressure behind the lifting valve is obtained through the pressure sensor, and the actual pressure behind the lifting valve is compared with the second target pressure behind the lifting valve to determine whether the target soot blower can continue to be in the operating state, thereby reducing errors and improving the accuracy of the detection of whether the soot blower can operate safely when in the operating state.

[0086] In this embodiment, when the target sootblower is in operation, the second maximum flue gas temperature of the area where the target sootblower is located corresponding to the second current operating condition is periodically obtained; the second target lift valve back pressure corresponding to the lift valve is obtained based on the second maximum flue gas temperature and the material of the target sootblower; the second target sootblowing steam main pipe pressure is obtained based on the second target lift valve back pressure and the first corresponding relationship; the actual sootblowing steam main pipe pressure corresponding to the second current operating condition is obtained; and the operating state of the target sootblower is controlled based on the actual sootblowing steam main pipe pressure and the second target sootblowing steam main pipe pressure. In this embodiment, a minimum sootblowing steam main pipe pressure safety value is obtained based on the maximum flue gas temperature of the corresponding area under the current operating condition of each sootblower. Therefore, during the load change process, the minimum sootblowing steam main pipe pressure safety value of this sootblower can be obtained in real time based on the maximum flue gas temperature, and used as a criterion for judging whether the sootblower can safely sootblow, so that the sootblower can still sootblow during the load change process, thereby extending the sootblowing time. Moreover, since the lifting valve is fully open, the throttling of the sootblowing steam is reduced. After the pressure of the reheat steam cooling section is reduced, the pressure behind the sootblower lifting valve can be increased, thereby widening the load range of the sootblower and further extending the sootblowing time.

[0087] Figure 3 This is a flow chart of a method for obtaining a first corresponding relationship provided in an embodiment of the present application. Figure 3 As shown, the method includes: S301. When the lifting valve is in a fully open state, dynamically adjust the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe.

[0088] In this step, since the steam used by the sootblower for sootblowing is obtained through the sootblowing steam main pipe, the sootblowing steam main pipe pressure determines whether the sootblower can safely blow soot. Therefore, when establishing the first correspondence, when the poppet valve is in the fully open state, the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe is changed. For example, the sootblowing steam main pipe pressure is increased by the same pressure value each time.

[0089] S302: After each dynamic adjustment, obtain the post-lift valve pressure corresponding to the lift valve.

[0090] In this step, after the sootblowing steam main pipe pressure changes, the corresponding pressure after the poppet valve also changes accordingly. Therefore, for each adjusted sootblowing steam main pipe pressure, the corresponding pressure after the poppet valve is obtained.

[0091] S303: Establish a first corresponding relationship according to the pressure after the poppet valve corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe obtained after each dynamic adjustment during the dynamic adjustment process.

[0092] In this step, a first corresponding relationship is established based on the sootblowing steam main pipe pressure after each adjustment and the corresponding pressure after the poppet valve.

[0093] It should be noted that the method for establishing the second correspondence relationship and the third correspondence relationship can refer to Figure 3 The method for establishing the first corresponding relationship shown will not be repeated here.

[0094] Figure 4 This is a schematic diagram of the structure of a boiler sootblowing control device provided in one embodiment of the present application. Figure 4 As shown, the apparatus of this embodiment includes: an acquisition module 410 , a processing module 420 , and a control module 430 . Optionally, the apparatus further includes: a debugging module 440 .

[0095] The acquisition module 410 is configured to acquire a first maximum flue gas temperature of an area where the target sootblower is located, corresponding to a first current operating condition, when the target sootblower is in a standby state; a processing module 420 configured to obtain a first target poppet valve downstream pressure corresponding to the poppet valve based on the first maximum flue gas temperature and the material of the target sootblower; and to obtain a first target sootblowing steam main pipe pressure based on the first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; and to determine a target reheat steam cold-section pressure based on the first target sootblowing steam main pipe pressure and a second correspondence between the sootblowing steam main pipe pressure established when the steam pressure regulating valve is at a preset opening value and the reheat steam cold-section pressure; The acquisition module 410 is further configured to obtain an actual reheat steam cold-segment pressure corresponding to the reheat steam cold-segment pipeline corresponding to the first current operating condition; The control module 430 is configured to determine whether the target sootblower can be put into operation according to the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure.

[0096] Optionally, the acquisition module 410 is further configured to periodically acquire a second maximum flue gas temperature of the area where the target sootblower is located corresponding to a second current operating condition when the target sootblower is in operation; The processing module 420 is further configured to obtain a second target pressure downstream of the poppet valve corresponding to the poppet valve based on the second maximum flue gas temperature and the material of the target sootblower; and to obtain a second target sootblowing steam main pipe pressure based on the second target pressure downstream of the poppet valve and the first corresponding relationship. The acquisition module 410 is further configured to acquire the actual sootblowing steam main pipe pressure corresponding to the second current operating condition; The control module 430 is further configured to determine whether the target sootblower can continue to operate according to the actual sootblowing steam main pipe pressure and the second target sootblowing steam main pipe pressure.

[0097] Optionally, the processing module 420 obtains a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower, specifically for: determining, according to the material of the target sootblower, a third corresponding relationship between the flue gas temperature and the steam cooling flow rate in the area where the target sootblower is located; determining a target steam cooling flow rate according to the first maximum flue gas temperature and the third corresponding relationship; The first target pressure after the poppet valve is obtained according to the target steam cooling flow rate.

[0098] Optionally, the acquisition module 410 is configured to obtain a first maximum flue gas temperature in the region where the target sootblower is located, corresponding to the first current operating condition, by: Obtaining a flue gas temperature corresponding to a preset area under the first current operating condition, where the preset area is an area where a sootblower equipped with a temperature measuring device is located; The first maximum flue gas temperature of the area where the target sootblower is located is determined according to the flue gas temperature gradient table, the flue gas temperature corresponding to the preset area, and the area where the target sootblower is located.

[0099] Optionally, before the processing module 420 obtains the first target sootblowing steam main pipe pressure based on the first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe, the debugging module 440 is configured to: When the poppet valve is in a fully open state, dynamically adjusting the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; After each dynamic adjustment, obtaining the post-lift valve pressure corresponding to the lift valve; The first corresponding relationship is established according to the pressure after the poppet valve corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe obtained after each dynamic adjustment during the dynamic adjustment process.

[0100] Optionally, the control module 430 decides whether the target sootblower can be put into operation based on the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure, specifically for: When the actual reheat steam cold section pressure is less than the target reheat steam cold section pressure, determining that the target soot blower is prohibited from being put into operation; When the actual reheat steam cold-section pressure is greater than or equal to the target reheat steam cold-section pressure, it is determined that the target sootblower can be put into operation.

[0101] Optionally, the control module 430 is also used to: control the opening of the steam pressure regulating valve according to the actual sootblowing steam main pipe pressure and the preset sootblowing steam main pipe pressure to adjust the current sootblowing steam main pipe pressure, and the preset sootblowing steam main pipe pressure is the sootblowing steam main pipe pressure corresponding to when the boiler is operating at full load.

[0102] The boiler sootblowing control device provided in the embodiment of the present application has a specific implementation process, which can be found in the above-mentioned method embodiment. Its implementation principle and technical effects are similar, and will not be repeated here in this embodiment.

[0103] Figure 5 This is a schematic diagram of the structure of an electronic device provided in one embodiment of the present application. Figure 5 As shown, the electronic device includes: a processor 510 and a memory 520.

[0104] The memory 520 stores computer-executable instructions.

[0105] The processor 510 executes the computer-executable instructions stored in the memory 520 , so that the processor 510 performs the method described in any one of the above embodiments.

[0106] The specific implementation process of the electronic device provided in the embodiment of the present application can be found in the above-mentioned method embodiment. Its implementation principle and technical effects are similar, and will not be repeated here in this embodiment.

[0107] In the above Figure 5 In the illustrated embodiment, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.

[0108] The memory may include a high-speed RAM memory, and may also include a non-volatile storage NVM, such as at least one disk storage.

[0109] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be classified as address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.

[0110] An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions. When a processor executes the computer-executable instructions, the method shown in the above method embodiment is implemented.

[0111] The computer-readable storage medium mentioned above can be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The computer-readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0112] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application-specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in a device as discrete components.

[0113] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A boiler sootblowing control method, characterized in that: Applied to a boiler sootblowing system, the boiler sootblowing system includes: a target sootblower, a poppet valve, a sootblowing steam main pipe, a steam pressure regulating valve, and a reheat steam cold section pipeline, wherein the poppet valve is in a fully open state when the sootblower is in any working state, and the working state includes: a standby state and an operating state; The method comprises: When the target sootblower is in a standby state, obtaining a first maximum flue gas temperature of an area where the target sootblower is located corresponding to a first current operating condition; Obtaining a first target poppet valve downstream pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower; Obtaining a first target sootblowing steam main pipe pressure according to the first target poppet valve downstream pressure and a first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; determining a target reheat steam cold-section pressure according to a first target sootblowing steam main pipe pressure and a second corresponding relationship between the sootblowing steam main pipe pressure and the reheat steam cold-section pressure established when the steam pressure regulating valve is at a preset opening value; Obtaining an actual reheat steam cold-section pressure corresponding to a reheat steam cold-section pipeline corresponding to the first current operating condition; Whether the target sootblower can be put into operation is determined according to the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure.

2. The method according to claim 1, characterized in that The method further comprises: When the target sootblower is in operation, periodically obtaining a second maximum flue gas temperature of the area where the target sootblower is located corresponding to a second current operating condition; Obtaining a second target poppet valve downstream pressure corresponding to the poppet valve according to the second maximum flue gas temperature and the material of the target sootblower; Obtaining a second target sootblowing steam main pipe pressure according to the second target pressure after the lift valve and the first corresponding relationship; Obtaining an actual sootblowing steam main pipe pressure corresponding to the second current operating condition; It is determined whether the target sootblower can continue to operate according to the actual sootblowing steam main pipe pressure and the second target sootblowing steam main pipe pressure.

3. The method according to claim 1, characterized in that The obtaining, according to the first maximum flue gas temperature and the material of the target sootblower, a first target pressure after the poppet valve corresponding to the poppet valve includes: determining, according to the material of the target sootblower, a third corresponding relationship between the flue gas temperature and the steam cooling flow rate in the area where the target sootblower is located; determining a target steam cooling flow rate according to the first maximum flue gas temperature and the third corresponding relationship; The first target pressure after the poppet valve is obtained according to the target steam cooling flow rate.

4. The method according to claim 1, wherein The obtaining of a first maximum flue gas temperature in a region where the target sootblower is located corresponding to the first current operating condition includes: Obtaining a flue gas temperature corresponding to a preset area under the first current operating condition, where the preset area is an area where a sootblower equipped with a temperature measuring device is located; The first maximum flue gas temperature of the area where the target sootblower is located is determined according to the flue gas temperature gradient table, the flue gas temperature corresponding to the preset area, and the area where the target sootblower is located.

5. The method according to claim 1, wherein Before obtaining the first target sootblowing steam main pipe pressure according to the first target poppet valve downstream pressure and the first correspondence between the poppet valve downstream pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe, the method further includes: When the poppet valve is in a fully open state, dynamically adjusting the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; After each dynamic adjustment, obtaining the post-lift valve pressure corresponding to the lift valve; The first corresponding relationship is established according to the pressure after the poppet valve corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe obtained after each dynamic adjustment during the dynamic adjustment process.

6. The method according to any one of claims 1 to 5, characterized in that The determining whether the target sootblower can be put into operation according to the actual reheat steam cold-section pressure and the target reheat steam cold-section pressure includes: When the actual reheat steam cold section pressure is less than the target reheat steam cold section pressure, determining that the target soot blower is prohibited from being put into operation; When the actual reheat steam cold-section pressure is greater than or equal to the target reheat steam cold-section pressure, it is determined that the target sootblower can be put into operation.

7. The method according to claim 2, characterized in that The method further comprises: The opening of the steam pressure regulating valve is controlled according to the actual sootblowing steam main pipe pressure and a preset sootblowing steam main pipe pressure to adjust the current sootblowing steam main pipe pressure, wherein the preset sootblowing steam main pipe pressure is the sootblowing steam main pipe pressure corresponding to when the boiler is operating at full load.

8. A boiler sootblowing control device, characterized in that: Applied to a boiler sootblowing system, the boiler sootblowing system includes: a target sootblower, a poppet valve, a sootblowing steam main pipe, a steam pressure regulating valve, and a reheat steam cold section pipeline, wherein the poppet valve is in a fully open state when the sootblower is in any working state, and the working state includes: a standby state and an operating state; The device comprises: an acquisition module, configured to acquire, when the target sootblower is in a standby state, a first maximum flue gas temperature of an area where the target sootblower is located, corresponding to a first current operating condition; a processing module, configured to obtain a first target poppet valve rear pressure corresponding to the poppet valve according to the first maximum flue gas temperature and the material of the target sootblower; and to obtain a first target sootblowing steam main pipe pressure according to the first target poppet valve rear pressure and a first correspondence between the poppet valve rear pressure corresponding to the poppet valve and the sootblowing steam main pipe pressure corresponding to the sootblowing steam main pipe; and to determine a target reheat steam cold-section pressure according to the first target sootblowing steam main pipe pressure and a second correspondence between the sootblowing steam main pipe pressure and the reheat steam cold-section pressure established when the steam pressure regulating valve is at a preset opening value; The acquisition module is further configured to obtain an actual reheat steam cold-segment pressure corresponding to the reheat steam cold-segment pipeline corresponding to the first current operating condition; The control module is used to decide whether the target sootblower can be put into use according to the actual reheat steam cold section pressure and the target reheat steam cold section pressure.

9. An electronic device, characterized in that: include: processor and memory; Memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory, so that the processor performs the method according to any one of claims 1 to 7.

10. A readable storage medium, characterized in that: include: The program or instruction, when the program or instruction is run on a computer, the method according to any one of claims 1 to 7 is executed.

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