A method, device and system for overhauling a waste heat boiler

Abstract

The application relates to a waste heat boiler maintenance decision method, device and system, wherein the waste heat boiler maintenance decision method comprises the following steps: constructing a dissipation temperature database according to a pre-established waste heat boiler model, the dissipation temperature database storing simulated dissipation temperatures of the waste heat boiler under different fault degrees; obtaining real-time operation data of the waste heat boiler, and obtaining a real-time dissipation temperature based on the real-time operation data; in the dissipation temperature database, the simulated dissipation temperature approximating to the real-time dissipation temperature is determined according to a preset method, and the fault degree of the waste heat boiler is obtained according to the determined simulated dissipation temperature; the remaining life of the waste heat boiler is determined based on the fault degree, and if the remaining life is less than or equal to a preset threshold, the waste heat boiler is maintained. Through the application, the problem of how to guarantee the reliability of the operation of a gas turbine waste heat boiler and make a maintenance decision for the waste heat boiler is solved.

Description

Technical Field

[0001] This application relates to the field of gas-fired power generation, and in particular to a method, apparatus, and system for decision-making regarding the maintenance of waste heat boilers. Background Technology

[0002] Key components of gas turbine waste heat boilers operate under high temperature and high pressure. During actual operation, severe degradation of material properties can occur, leading to equipment failure and necessitating maintenance. Therefore, effective monitoring of equipment degradation and lifespan allows for timely assessment of the equipment's condition, thereby improving its safety and reliability during operation.

[0003] Therefore, ensuring the reliability of gas turbine waste heat boiler operation and making maintenance decisions have become urgent problems to be solved. Summary of the Invention

[0004] This application provides a waste heat boiler maintenance decision-making method, apparatus, and system to at least solve the problem in the related art of how to ensure the reliability of gas turbine waste heat boiler operation and make maintenance decisions for it.

[0005] In a first aspect, embodiments of this application provide a waste heat boiler maintenance decision-making method, wherein the waste heat boiler includes a superheater, characterized in that it includes:

[0006] A dissipation temperature database is constructed based on a pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault conditions.

[0007] Obtain the real-time operating data of the waste heat boiler, and obtain the real-time dissipation temperature based on the real-time operating data;

[0008] In the dissipation temperature database, a simulated dissipation temperature that is approximately the same as the real-time dissipation temperature is determined according to a preset method, and the degree of failure of the waste heat boiler is obtained based on the determined simulated dissipation temperature.

[0009] The remaining lifespan of the waste heat boiler is determined based on the degree of failure. If the remaining lifespan is less than or equal to a preset threshold, the waste heat boiler is overhauled.

[0010] In one embodiment, determining the remaining lifespan of the waste heat boiler based on the degree of failure includes:

[0011] Under the aforementioned fault level, the steam pressure of the superheater in the waste heat boiler is obtained, and the thermal intensity parameter is determined based on the steam pressure.

[0012] Based on the thermal intensity parameter, the creep rupture time of the superheater is determined, and the creep life consumption is determined based on the creep rupture time. The creep life consumption of the superheater under different operating conditions is also obtained.

[0013] The remaining lifespan of the waste heat boiler is obtained based on the total creep lifespan consumption and the preset value.

[0014] In one embodiment, the simulated dissipation temperature and the real-time dissipation temperature satisfy the following configuration:

[0015] ζ=(e in,k -e out,k ) / (S in,k -S out,k )

[0016] Where ζ is the dissipation temperature, e in,k The inlet working fluid for any component of a waste heat boiler e out,k The outlet working fluid of any component of the waste heat boiler S in,k Let S be the entropy of the inlet working fluid for any component of the waste heat boiler. out,k Let be the entropy of the working fluid at the outlet of any component of the waste heat boiler.

[0017] In one embodiment, the thermal intensity parameter satisfies the following configuration:

[0018] δ=P(D n +S) / 2S

[0019] P(δ)=C0+C1lgδ+C2lg2δ+C3lg3δ

[0020] Where δ is thermal stress, D n S is the inner diameter of the superheater pipe, S is the thickness of the superheater pipe wall, P is the vapor pressure of the gas in the superheater, P(δ) is the thermal intensity parameter, and C0, C1, C2, and C3 are the parameters of the thermal intensity parameter polynomial.

[0021] In one embodiment, the remaining lifespan of the waste heat boiler meets the following configuration:

[0022] T(A pipe +lgτ)=P(δ)

[0023] Where T is the temperature of the superheater tube wall, and A pipe τ represents the material parameters of the superheater pipes, τ represents the creep and fission time of the waste heat boiler, and P(δ) represents the thermal intensity parameter.

[0024] In one embodiment, the method further includes:

[0025] Obtain the maintenance cost and fuel increase cost of the waste heat boiler operating under the stated fault level, compare the maintenance cost and fuel increase cost, and if the maintenance cost is less than the fuel increase cost, then the waste heat boiler is to be maintained.

[0026] In one embodiment, the calculation of the total maintenance cost and the additional fuel cost satisfies the following configuration:

[0027] CHM1 = A / (Pe*PT*N*X),

[0028] CHM2=24*T m *D / (PT*N),

[0029] CHM3 = p*V,

[0030] Wherein, CHM1 represents direct maintenance costs, CHM2 represents power generation loss costs during maintenance, CHM3 represents additional material costs, A represents total waste heat boiler component maintenance costs, Pe represents bottom cycle power, PT represents maintenance interval, N represents annual operating hours, X represents average load factor, Tm represents maintenance time, D represents electricity price, and p represents natural gas price. The unit is (yuan / Nm³). 3 V represents the unit gas consumption difference, with units of Nm³. 3 / kwh.

[0031] Secondly, embodiments of this application provide a waste heat boiler maintenance decision-making device, comprising:

[0032] The construction module is used to construct a dissipation temperature database based on a pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault levels.

[0033] The first acquisition module is used to acquire the real-time operating data of the waste heat boiler and obtain the real-time dissipation temperature based on the real-time operating data.

[0034] The second acquisition module is used to determine, in the dissipation temperature database, the simulated dissipation temperature that is approximately the same as the real-time dissipation temperature according to a preset method, and to obtain the degree of failure of the waste heat boiler based on the determined simulated dissipation temperature.

[0035] The maintenance module is used to determine the remaining life of the waste heat boiler based on the degree of failure. If the remaining life is less than or equal to a preset threshold, the waste heat boiler is then maintained.

[0036] Thirdly, embodiments of this application provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the waste heat boiler maintenance decision-making method as described in the first aspect above.

[0037] Fourthly, embodiments of this application provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the waste heat boiler maintenance decision-making method as described in the first aspect above.

[0038] The waste heat boiler maintenance decision-making method, device, and system provided in this application embodiment have at least the following technical effects.

[0039] Based on a pre-established waste heat boiler model, a dissipation temperature database is constructed. Real-time operating data of the waste heat boiler is acquired, and the real-time dissipation temperature is obtained based on this data. A simulated dissipation temperature approximating the real-time dissipation temperature is determined in the dissipation temperature database using a preset method. The degree of failure of the waste heat boiler is determined based on the determined simulated dissipation temperature. The remaining lifespan of the waste heat boiler is determined based on the degree of failure. If the remaining lifespan of the waste heat boiler is less than a preset threshold, the waste heat boiler is inspected and repaired. This method uses the waste heat boiler's dissipation temperature as an indicator, determines the degree of failure based on the dissipation temperature, and thus obtains the remaining lifespan of the waste heat boiler. The remaining lifespan is then used to determine whether the waste heat boiler needs repair, thereby ensuring the reliability of the waste heat boiler's operation and enabling better maintenance.

[0040] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0041] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0042] Figure 1 This is a flowchart illustrating a waste heat boiler maintenance decision-making method according to an exemplary embodiment;

[0043] Figure 2 This is a flowchart illustrating a waste heat boiler maintenance decision-making process according to another exemplary embodiment;

[0044] Figure 3 This is a block diagram of a waste heat boiler maintenance decision-making device according to an exemplary embodiment;

[0045] Figure 4 This is a block diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0047] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0048] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0049] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0050] A waste heat boiler includes an economizer, evaporator, superheater, and heat exchange tube assemblies and containers such as headers and steam drum. During operation, the pressure and temperature of the working fluid flowing through the superheater are higher than those of other components in the waste heat boiler. Therefore, the superheater operates in the most challenging environment. Considering the reliability of the waste heat boiler, the reliability of the superheater can represent the overall reliability of the boiler. Therefore, this application describes the implementation of reliability based on a waste heat boiler using steam as the working fluid, along with superheater data and implementation methods.

[0051] Based on the above, this application provides a waste heat boiler maintenance decision-making method, apparatus, and system.

[0052] Firstly, embodiments of this application provide a method for decision-making regarding the maintenance of a waste heat boiler. Figure 1 This is a flowchart illustrating a waste heat boiler maintenance decision-making method according to an exemplary embodiment, such as... Figure 1 As shown, the decision-making method for waste heat boiler maintenance includes:

[0053] Step S101: Construct a dissipation temperature database based on the pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault levels.

[0054] A waste heat boiler model is established based on the load, environmental parameters, and fuel consumption. Based on this model, simulated operating data of the waste heat boiler under different operating conditions and varying degrees of failure are obtained, resulting in multiple simulated dissipation temperatures. A dissipation temperature database is then constructed based on these simulated temperatures. This database stores the simulated dissipation temperatures of the waste heat boiler under different failure degrees. Each simulated dissipation temperature corresponds to a specific failure degree; therefore, the failure degree of the waste heat boiler can be determined from the simulated dissipation temperatures within the database.

[0055] On the other hand, based on the simulation operation data obtained from the waste heat boiler model, and combined with the working fluid property parameter table, the working fluid at the inlet and outlet of any component in the waste heat boiler is determined. Value and entropy value. Based on the inlet and outlet of any component. The values ​​of entropy and entropy are used to determine the simulated dissipation temperature. The simulated dissipation temperature satisfies the following configuration:

[0056] ζ=(e in,k -e out,k ) / (S in,k -S out,k )

[0057] Where ζ is the dissipation temperature, e in,k The inlet working fluid for any component of a waste heat boiler e out,k The outlet working fluid of any component of the waste heat boiler S in,k Let S be the entropy of the inlet working fluid for any component of the waste heat boiler. out,k Let be the entropy of the working fluid at the outlet of any component of the waste heat boiler.

[0058] Step S102: Obtain real-time operating data of the waste heat boiler and obtain the real-time dissipation temperature based on the real-time operating data.

[0059] Real-time operating data of the working fluid in the waste heat boiler is acquired based on pre-set measurement points at the superheater, evaporator, economizer, and reheater within the waste heat boiler. Optionally, the real-time operating data includes the temperature and pressure of the working fluid flowing through the reheaters. Based on the real-time operating data, the real-time dissipation temperature is obtained. The real-time dissipation temperature satisfies the following configuration:

[0060] ζ=(e in,k -e out,k ) / (S in,k -S out,k )

[0061] Where ζ is the dissipation temperature, e in,k The inlet working fluid for any component of a waste heat boiler e out,kThe outlet working fluid of any component of the waste heat boiler S in,k Let S be the entropy of the inlet working fluid for any component of the waste heat boiler. out,k Let be the entropy of the working fluid at the outlet of any component of the waste heat boiler.

[0062] Step S103: In the dissipation temperature database, determine the simulated dissipation temperature that is similar to the real-time dissipation temperature according to the preset method, and obtain the fault degree of the waste heat boiler based on the determined simulated dissipation temperature.

[0063] In the dissipation data temperature library, each simulated dissipation temperature corresponds to a fault level. The real-time dissipation temperature is compared with the simulated dissipation temperatures in the dissipation temperature library to determine the simulated dissipation temperature that is close to the real-time dissipation temperature. The fault level of the waste heat boiler is determined based on the fault level corresponding to the determined simulated dissipation temperature.

[0064] In one embodiment, the real-time dissipation temperature is compared with the simulated dissipation temperature in the dissipation temperature database, and a simulated dissipation temperature that approximates the real-time dissipation temperature is determined within a preset fluctuation range. The degree of failure of the waste heat boiler is then determined based on the degree of failure corresponding to the determined simulated dissipation temperature.

[0065] In another embodiment, the real-time dissipation temperature is compared with the simulated dissipation temperature in the dissipation temperature database. If the real-time dissipation temperature is consistent with the simulated dissipation temperature, the fault level corresponding to the simulated dissipation temperature is determined as the fault level of the waste heat boiler.

[0066] By obtaining the inlet and outlet of the waste heat boiler By using the values ​​of heat dissipation and entropy, the heat dissipation temperature of the waste heat boiler can be obtained as an efficiency indicator, thereby determining the degree of failure of the waste heat boiler and enabling real-time monitoring of its health status.

[0067] Step S104: Determine the remaining lifespan of the waste heat boiler based on the degree of failure. If the remaining lifespan is less than or equal to a preset threshold, then the waste heat boiler shall be overhauled.

[0068] Under the fault condition, the steam pressure of the superheater in the waste heat boiler is obtained, and the thermal intensity parameters are determined based on the steam pressure.

[0069] After determining the severity of the waste heat boiler's failure, the steam pressure in the superheater is obtained based on this severity, thus acquiring the real-time thermal stress of the superheater. According to real-time thermal conventions and metal materials handbooks, the thermal intensity parameters are determined. These thermal intensity parameters satisfy the following configuration:

[0070] δ=P(D n +S) / 2S

[0071] P(δ)=C0+C1lgδ+C2lg2δ+C3lg3δ

[0072] Where δ is thermal stress, D n S is the inner diameter of the superheater pipe, S is the thickness of the superheater pipe wall, P is the vapor pressure of the gas in the superheater, P(δ) is the thermal intensity parameter, and C0, C1, C2, and C3 are the parameters of the thermal intensity parameter polynomial.

[0073] Based on the thermal intensity parameter, the creep rupture time of the superheater is determined, and the creep life consumption is determined based on the creep rupture time. The creep life consumption of the superheater under different operating conditions is obtained, and the obtained creep life consumption under different operating conditions is added together to obtain the total creep life consumption.

[0074] Creep time characterizes the usable life of a superheater under any operating condition. The Larson-Miller equation reflects the relationship between the operating temperature of a metal and creep time under different stresses. Therefore, based on the thermal stress and thermal intensity parameters obtained above, the creep time of the superheater is determined.

[0075] Creep life consumption is the reciprocal of creep rupture time, representing the amount of usable life consumed by the superheater. Based on the above method, the creep life consumption of the superheater under different operating conditions is obtained, and the creep life consumption of the superheater under these different operating conditions is added together to obtain the total creep life consumption.

[0076] The remaining lifespan of the waste heat boiler is obtained based on the total creep life consumption and the preset value.

[0077] The remaining lifespan of the superheater is obtained by subtracting the total creep lifespan from the preset value. Since the superheater operates in the most severe environment, its remaining lifespan is the same as that of the waste heat boiler. Therefore, the remaining lifespan of the superheater is consistent with that of the waste heat boiler.

[0078] In one specific embodiment, the remaining life of the superheater, i.e. the remaining life of the waste heat boiler, is the difference between 1 and the total creep life consumed.

[0079] In another specific embodiment, Table 1 is a comparison table of thermal stress and remaining life loss of the superheater before and after the failure of the waste heat boiler. As shown in Table 1, under different load conditions, the thermal stress and remaining life loss before and after the failure can be obtained. The life of the waste heat boiler before the failure is 101,307 hours. Under the given failure conditions and failure degree, the remaining life of the waste heat boiler is 75,472 hours.

[0080] Table 1 Comparison of thermal stress and remaining life loss of superheater before and after waste heat boiler failure.

[0081]

[0082]

[0083] The remaining lifespan of the waste heat boiler is compared with a preset threshold. If the remaining lifespan is less than the preset threshold, the waste heat boiler is inspected and repaired. If the remaining lifespan is greater than the preset threshold, the real-time thermal stress of the waste heat boiler is obtained again, and the remaining lifespan of the waste heat boiler is updated.

[0084] By obtaining the inlet and outlet of the waste heat boiler By analyzing the heat dissipation temperature and entropy values, the efficiency index of the waste heat boiler is obtained, which is then used to determine the degree of failure and monitor its health status in real time. Based on the current operating conditions of the waste heat boiler, its remaining lifespan is calculated, and a reasonable maintenance schedule is determined accordingly, thus ensuring the reliability of the waste heat boiler during operation.

[0085] Due to power industry development reforms and increasingly fierce competition, the economical operation and maintenance costs of waste heat boilers have become extremely important. Long-term operation and frequent load changes in waste heat boilers lead to their gradual aging during use. However, to extend the lifespan of the waste heat boiler and ensure the safety of personnel, its reliability must not be compromised. Balancing operational reliability with reduced maintenance costs has become a crucial aspect of waste heat boiler maintenance.

[0086] Therefore, when considering waste heat boilers, it is also necessary to consider the economics of their maintenance in order to reduce maintenance costs.

[0087] Considering the economics of overhauling waste heat boilers, the decision-making methods for waste heat boiler overhaul also include:

[0088] Obtain the maintenance cost and additional fuel cost of the waste heat boiler operating under the current fault level. Compare the maintenance cost and additional fuel cost. If the maintenance cost is less than the additional fuel cost, then the waste heat boiler needs maintenance. If the maintenance cost is greater than or equal to the additional fuel cost, the waste heat boiler can continue to operate without maintenance.

[0089] The maintenance cost for the waste heat boiler should meet the following requirements:

[0090] CHM1 = A / (Pe*PT*N*X),

[0091] CHM2=24*T m *D / (PT*N),

[0092] Wherein, CHM1 is the direct maintenance cost, CHM2 is the maintenance power generation loss cost, CHM3 is the material additional cost, A is the total waste heat boiler component maintenance cost, Pe is the bottom cycle power, PT is the maintenance interval, N is the annual operating hours, X is the average load factor, Tm is the maintenance time, and D is the electricity price.

[0093] According to the above calculation method, the maintenance cost of the waste heat boiler is the sum of the direct maintenance cost and the power generation loss cost.

[0094] If the waste heat boiler undergoes maintenance, and continues to operate based on its current operating conditions and the severity of the malfunction, additional fuel may be required. The additional fuel cost will be determined based on this additional fuel. The additional fuel cost will meet the following requirements:

[0095] CHM3 = p*V,

[0096] Where p is the price of natural gas, in yuan / Nm³. 3 V represents the unit gas consumption difference, with units of Nm³. 3 / kwh.

[0097] The remaining lifespan of the waste heat boiler is used to determine whether maintenance is necessary to ensure its reliability. After assessing the remaining lifespan, the cost of maintenance must also be considered. Maintenance of the waste heat boiler should be considered from both reliability and economic perspectives.

[0098] In one specific embodiment Figure 2 This is a flowchart illustrating a waste heat boiler maintenance decision-making process according to another exemplary embodiment, such as... Figure 2 As shown, the fault level of the waste heat boiler is determined by real-time dissipation temperature and a dissipation temperature database. Based on the determined fault level, the remaining lifespan of the waste heat boiler is obtained from the perspective of boiler reliability. If the remaining lifespan is less than or equal to a preset threshold, the waste heat boiler is overhauled to ensure its reliable operation. If the remaining lifespan is greater than the preset threshold, the waste heat boiler can continue to operate, but the economics of operating the waste heat boiler under the current fault level must also be considered. If the increased fuel cost exceeds the maintenance cost for the waste heat boiler under the current fault level, then maintenance is required. Therefore, the maintenance of the waste heat boiler considers both the reliability of its operation and the economics of its use.

[0099] In summary, the waste heat boiler maintenance decision-making method provided in this application obtains the data from the inlet and outlet of the waste heat boiler. The system uses the heat dissipation temperature and entropy value of the waste heat boiler as indicators to determine its failure level, thus enabling real-time monitoring of its health. Based on the current failure level, the remaining lifespan at that level is calculated. Whether or not maintenance is required depends on whether the remaining lifespan exceeds a preset threshold. Simultaneously, the economics of maintenance are considered. When the increased fuel cost of a faulty waste heat boiler exceeds the maintenance cost, maintenance is more economical. This approach achieves reliable and economical maintenance decisions for waste heat boilers, resolving the problem of ensuring the reliability of gas turbine waste heat boiler operation and making maintenance decisions in related technologies.

[0100] Secondly, embodiments of this application provide a waste heat boiler maintenance decision-making device. Figure 3 This is a block diagram illustrating a waste heat boiler maintenance decision-making device according to an exemplary embodiment. Figure 3 As shown, the waste heat boiler maintenance decision-making device includes:

[0101] The module is used to build a dissipation temperature database based on a pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault conditions.

[0102] The first acquisition module is used to acquire real-time operating data of the waste heat boiler and obtain the real-time dissipation temperature based on the real-time operating data.

[0103] The second acquisition module is used to determine a simulated dissipation temperature that is approximately the same as the real-time dissipation temperature in the dissipation temperature database according to a preset method, and to obtain the degree of failure of the waste heat boiler based on the determined simulated dissipation temperature.

[0104] The maintenance module is used to determine the remaining life of the waste heat boiler based on the degree of failure. If the remaining life is less than or equal to a preset threshold, the waste heat boiler will be maintained.

[0105] In summary, the waste heat boiler maintenance decision-making device provided in this application constructs a dissipation temperature database based on a pre-established waste heat boiler model in its construction module. In the first acquisition module, real-time operating data of the waste heat boiler is acquired, and the real-time dissipation temperature is obtained based on this data. In the second acquisition module, a simulated dissipation temperature approximating the real-time dissipation temperature is determined from the dissipation temperature database using a preset method, and the degree of failure of the waste heat boiler is determined based on the determined simulated dissipation temperature. In the maintenance module, the remaining lifespan of the waste heat boiler is determined based on its degree of failure. If the remaining lifespan of the waste heat boiler is less than a preset threshold, maintenance is performed on the waste heat boiler. Through the above method, using the dissipation temperature of the waste heat boiler as an indicator, and determining the degree of failure based on the dissipation temperature, the remaining lifespan of the waste heat boiler is obtained. Based on the remaining lifespan, it is determined whether the waste heat boiler needs maintenance, thereby ensuring the reliability of the waste heat boiler's operation and enabling better maintenance.

[0106] It should be noted that this embodiment provides a waste heat boiler maintenance decision-making device to implement the above-described embodiments, and details already described will not be repeated. As used above, terms such as "module," "unit," and "subunit" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the above embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0107] Thirdly, embodiments of this application provide an electronic device, Figure 4 This is a block diagram illustrating an electronic device according to an exemplary embodiment. (e.g.) Figure 4 As shown, the electronic device may include a processor 81 and a memory 82 storing computer program instructions.

[0108] Specifically, the processor 81 may include a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits that can be configured to implement the embodiments of this application.

[0109] The memory 82 may include a mass storage device for data or instructions. For example, and not limitingly, the memory 82 may include a hard disk drive (HDD), a floppy disk drive, a solid-state drive (SSD), flash memory, an optical disk drive, a magneto-optical disk drive, magnetic tape, or a Universal Serial Bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 82 may include removable or non-removable (or fixed) media. Where appropriate, the memory 82 may be internal or external to a data processing device. In a particular embodiment, the memory 82 is non-volatile memory. In a particular embodiment, the memory 82 includes read-only memory (ROM) and random access memory (RAM). Where appropriate, the ROM may be a mask-programmed ROM, a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), an electrically alterable read-only memory (EAROM), or flash memory, or a combination of two or more of these. Where appropriate, the RAM can be Static Random-Access Memory (SRAM) or Dynamic Random-Access Memory (DRAM). DRAM can be Fast Page Mode Dynamic Random-Access Memory (FPMDRAM), Extended Data Out Dynamic Random-Access Memory (EDODRAM), Synchronous Dynamic Random-Access Memory (SDRAM), etc.

[0110] The memory 82 can be used to store or cache various data files that need to be processed and / or communicated, as well as possible computer program instructions executed by the processor 81.

[0111] The processor 81 reads and executes computer program instructions stored in the memory 82 to implement any of the waste heat boiler maintenance decision-making methods in the above embodiments.

[0112] In one embodiment, the waste heat boiler maintenance decision-making device may further include a communication interface 83 and a bus 80. Wherein, as... Figure 4 As shown, the processor 81, memory 82, and communication interface 83 are connected through bus 80 and complete communication with each other.

[0113] The communication interface 83 is used to enable communication between the various modules, devices, units, and / or equipment in the embodiments of this application. The communication port 83 can also enable data communication with other components such as external devices, image / data acquisition devices, databases, external storage, and image / data processing workstations.

[0114] Bus 80 includes hardware, software, or both, that couples together the components of the waste heat boiler maintenance decision-making device. Bus 80 includes, but is not limited to, at least one of the following: data bus, address bus, control bus, expansion bus, and local bus. For example, and not as a limitation, bus 80 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Extended Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other suitable buses, or a combination of two or more of these. Where appropriate, bus 80 may include one or more buses. Although specific buses are described and illustrated in the embodiments of this application, this application considers any suitable bus or interconnection.

[0115] Fourthly, embodiments of this application provide a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the waste heat boiler maintenance decision-making method provided in the first aspect.

[0116] The readable storage medium may be more specifically adopted, including but not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device, or any suitable combination thereof.

[0117] In a possible implementation, the present invention can also be implemented as a program product comprising program code, which, when the program product is run on a terminal device, is used to cause the terminal device to perform steps of implementing the waste heat boiler maintenance decision-making method provided in the first aspect.

[0118] The program code for executing the present invention can be written in any combination of one or more programming languages. The program code can be executed entirely on the user device, partially on the user device, as a standalone software package, partially on the user device and partially on a remote device, or entirely on a remote device.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for decision-making regarding the maintenance of a waste heat boiler, wherein the waste heat boiler includes a superheater, characterized in that, include: A dissipation temperature database is constructed based on a pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault conditions. Obtain the real-time operating data of the waste heat boiler, and obtain the real-time dissipation temperature based on the real-time operating data; In the dissipation temperature database, a simulated dissipation temperature that is approximately the same as the real-time dissipation temperature is determined according to a preset method, and the degree of failure of the waste heat boiler is obtained based on the determined simulated dissipation temperature. The remaining lifespan of the waste heat boiler is determined based on the degree of failure. If the remaining lifespan is less than or equal to a preset threshold, the waste heat boiler is overhauled. The simulated dissipation temperature and the real-time dissipation temperature satisfy the following configuration: ζ=(e in,k -and out,k ) / (S in,k -S out,k ) Where ζ is the dissipation temperature, e in,k e is the inlet working fluid for any component of the waste heat boiler. out,k For any component of the waste heat boiler, the outlet working fluid is S. in,k Let S be the entropy of the inlet working fluid for any component of the waste heat boiler. out,k Let be the entropy of the working fluid at the outlet of any component of the waste heat boiler.

2. The waste heat boiler maintenance decision-making method according to claim 1, characterized in that, Determining the remaining lifespan of the waste heat boiler based on the degree of failure includes: Under the aforementioned fault level, the steam pressure of the superheater in the waste heat boiler is obtained, and the thermal intensity parameter is determined based on the steam pressure. Based on the thermal intensity parameter, the creep rupture time of the superheater is determined, and the creep life consumption is determined based on the creep rupture time. The creep life consumption of the superheater under different operating conditions is obtained, and the obtained creep life consumption under different operating conditions is added together to obtain the total creep life consumption. The remaining lifespan of the waste heat boiler is obtained based on the total creep lifespan consumption and the preset value.

3. The waste heat boiler maintenance decision-making method according to claim 2, characterized in that, The thermal intensity parameters meet the following configuration: δ=P(D n +S) / 2S P(δ)=C0+C1lgδ+C2lg2δ+C3lg3δ Where δ is thermal stress, D n S is the inner diameter of the superheater pipe, S is the thickness of the superheater pipe wall, P is the vapor pressure of the gas in the superheater, P(δ) is the thermal intensity parameter, and C0, C1, C2, and C3 are the parameters of the thermal intensity parameter polynomial.

4. The waste heat boiler maintenance decision-making method according to claim 3, characterized in that, The creep rupture time meets the following configuration: T(A pipe +lgτ)= P(δ) Where T is the temperature of the superheater tube wall, and A pipe τ represents the material parameters of the superheater pipes, τ represents the creep rupture time of the waste heat boiler, and P(δ) represents the thermal intensity parameter.

5. The waste heat boiler overhaul decision-making method according to claim 1, characterized in that, The method further includes: Obtain the maintenance cost and fuel increase cost of the waste heat boiler operating under the stated fault level, compare the maintenance cost and fuel increase cost, and if the maintenance cost is less than the fuel increase cost, then the waste heat boiler is to be maintained.

6. The waste heat boiler maintenance decision-making method according to claim 5, characterized in that, The calculation of maintenance costs and additional fuel costs meets the following configuration: CHM1=A / (Pe*PT*N*X), CHM2=24*Tm*D / (PT*N), CHM3 = p * V, Wherein, CHM1 represents direct maintenance costs, CHM2 represents power generation loss costs during maintenance, CHM3 represents additional material costs, A represents total waste heat boiler component maintenance costs, Pe represents bottom cycle power, PT represents maintenance interval, N represents annual operating hours, X represents average load factor, Tm represents maintenance time, D represents electricity price, and p represents natural gas price. The unit is RMB / Nm. 3 V represents the unit gas consumption difference, with units of Nm³. 3 / kwh.

7. A waste heat boiler maintenance decision-making device, characterized in that, include: The construction module is used to construct a dissipation temperature database based on a pre-established waste heat boiler model. The dissipation temperature database stores the simulated dissipation temperature of the waste heat boiler under different fault levels. The first acquisition module is used to acquire the real-time operating data of the waste heat boiler and obtain the real-time dissipation temperature based on the real-time operating data. The second acquisition module is used to determine, in the dissipation temperature database, the simulated dissipation temperature that is approximately the same as the real-time dissipation temperature according to a preset method, and to obtain the degree of failure of the waste heat boiler based on the determined simulated dissipation temperature. The maintenance module is used to determine the remaining life of the waste heat boiler based on the degree of failure. If the remaining life is less than or equal to a preset threshold, the waste heat boiler is then maintained. The simulated dissipation temperature and the real-time dissipation temperature satisfy the following configuration: ζ=(e in,k -and out,k ) / (S in,k -S out,k ) Where ζ is the dissipation temperature, e in,k e is the inlet working fluid for any component of the waste heat boiler. out,k For any component of the waste heat boiler, the outlet working fluid is S. in,k Let S be the entropy of the inlet working fluid for any component of the waste heat boiler. out,k Let be the entropy of the working fluid at the outlet of any component of the waste heat boiler.

8. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the waste heat boiler maintenance decision method as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the waste heat boiler maintenance decision-making method as described in any one of claims 1 to 6.

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