A method, system, device and medium for early warning of the service life of an SCR catalyst

Abstract

The present application relates to the technical field of SCR denitration catalyst, and discloses a kind of SCR catalyst life early warning method, system, equipment and medium, wherein the method comprises: obtaining the real-time operation data of thermal power generating unit, the real-time operation data includes main steam flow and outlet oxygen concentration;According to the real-time operation data, the flue gas amount entering the SCR denitration system in the thermal power generating unit is calculated, and the import flue gas amount is obtained;According to the import flue gas amount, the SCR catalyst life monitoring evaluation standard with life coefficient as the characterization object is established, and the life coefficient of the SCR catalyst is obtained;The early warning level is determined according to the life coefficient of the SCR catalyst.The present application does not need to obtain mass historical data for modeling, and only by the key index acquisition of SCR system and the actual chemical reaction calculation, the evaluation index objectively reflecting the current SCR catalyst activity can be obtained, and the catalyst deactivation time is predicted by using regression curve, to help operation personnel accurately and timely master the SCR catalyst life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of SCR denitration catalyst, in particular to an SCR catalyst life warning method, system, device and medium. BACKGROUND

[0002] At present, the SCR catalyst is the core component in the selective catalytic reduction (SCR) method. Under the action of the catalyst, ammonia is sprayed into flue gas at a temperature of about 280-420 DEG C, and NO is reduced to N2 and H2O, which ensures the emission standard of pollutants. The life of the catalyst is crucial to the SCR system, and the pollutants in part of the flue gas cause catalyst poisoning; the substances such as NH4HSO4 generated in the system reduce the ammonia utilization rate; and the high-dispersed dust particles cover the surface of the catalyst, reducing its activity. These factors will all cause the activity of the catalyst to decrease and the life to decrease, thereby causing problems in environmental protection, economy and even operation safety. x

[0003] The existing SCR catalyst life prediction mainly adopts the following methods: a, offline catalyst test block detection. The catalyst manufacturer will arrange a test block in the catalyst to test the catalyst activity. When the catalyst activity needs to be tested, the test block or the catalyst sample collected on site is taken out and sent to a special laboratory for testing. Because the unit is generally continuously operated for a long time, the number of actual catalyst sample tests is not high, the detection frequency is actually low, and the operation personnel cannot accurately and effectively grasp the SCR catalyst activity. B, a fixed SCR inlet ammonia nitrogen molar ratio is adopted to establish the relationship between the denitration efficiency and the catalyst activity, and then the catalyst deactivation time is predicted. However, this method has the following problems: on the one hand, the method needs to collect a large amount of historical data of the power plant SIS system for modeling, which consumes a lot of time and computing power. Once the related system is modified and adjusted, all the work needs to be re-performed. On the other hand, because the unit emission is a hard environmental protection index, it will be adjusted through various operation methods to meet the emission standard during actual operation. Therefore, the ammonia nitrogen molar ratio at the SCR inlet is a dynamic adjustment quantity, and this method has certain limitations in this regard, and the prediction accuracy will also be affected. Therefore, there is an urgent need for a solution to solve the above problems. SUMMARY

[0004] The present application provides an SCR catalyst life warning method, system, device and medium, which solves the problems of low efficiency of the existing SCR catalyst life prediction, the need for a large amount of historical data, the consumption of a large amount of time and computing power, and the inability of the operation personnel to accurately and effectively grasp the SCR catalyst activity.

[0005] To solve the above technical problems, the first aspect of the present application provides an SCR catalyst life warning method, comprising: ​

[0006] obtain real-time operation data of the thermal power generating unit, wherein the real-time operation data comprises a main steam flow and an outlet oxygen concentration;

[0007] According to the real-time operation data, calculate the flue gas amount entering the SCR denitration system in the thermal power generating unit to obtain an import flue gas amount;

[0008] According to the import flue gas amount, establish an SCR catalyst life monitoring and evaluation standard taking a life coefficient as a representation object to obtain the life coefficient of the SCR catalyst;

[0009] According to the life coefficient of the SCR catalyst, determine a warning level.

[0010] Further, the import flue gas amount is calculated by the following formula:

[0011]

[0012] In the formula, Q s is the import flue gas amount; K is a dimensional empirical constant; O2 is the outlet oxygen concentration; and F is the main steam flow.

[0013] Further, according to the import flue gas amount, establish an SCR catalyst life monitoring and evaluation standard taking a life coefficient as a representation object to obtain the life coefficient of the SCR catalyst, comprising:

[0014] According to the import flue gas amount, calculate a theoretical ammonia reaction amount in the SCR denitration system, and take the theoretical ammonia reaction amount as a theoretical ammonia demand;

[0015] According to the theoretical ammonia demand, calculate an SCR catalyst life monitoring and evaluation standard taking a life coefficient as a representation object to obtain the life coefficient of the SCR catalyst.

[0016] Further, if the SCR denitration system comprises a liquid ammonia furnace, the real-time operation data further comprises a liquid ammonia flow; wherein,

[0017] According to the theoretical ammonia demand, calculate an SCR catalyst life monitoring and evaluation standard taking a life coefficient as a representation object to obtain the life coefficient of the SCR catalyst, specifically:

[0018] According to the liquid ammonia flow and the theoretical ammonia demand, calculate an SCR catalyst life monitoring and evaluation standard taking a life coefficient as a representation object to obtain the life coefficient of the SCR catalyst.

[0019] Further, if the SCR denitration system comprises a urea furnace, the real-time operation data further comprises a urea solution flow; wherein,

[0020] The SCR catalyst life monitoring evaluation standard taking the life coefficient as a representation object is calculated according to the theoretical ammonia requirement, and the life coefficient of the SCR catalyst is obtained, including:

[0021] The actual ammonia reaction amount in the SCR denitration system is calculated according to the urea solution flow, and the actual ammonia reaction amount is taken as the actual ammonia consumption amount;

[0022] The SCR catalyst life monitoring evaluation standard taking the life coefficient as a representation object is calculated according to the actual ammonia consumption amount and the theoretical ammonia requirement, and the life coefficient of the SCR catalyst is obtained.

[0023] Further, the early warning level is determined according to the life coefficient of the SCR catalyst, including:

[0024] The life prediction curve is generated according to the life coefficient of the SCR catalyst in a preset time period;

[0025] The life of the SCR catalyst at a future preset time is predicted according to the life prediction curve, and the life coefficient of the SCR catalyst at the future preset time is obtained;

[0026] The early warning level is determined according to the relationship between the life coefficient of the SCR catalyst at the future preset time and a preset threshold value.

[0027] Further, the preset threshold value includes a first preset threshold value, a second preset threshold value and a third preset threshold value;

[0028] The early warning level is determined according to the relationship between the life coefficient of the SCR catalyst at the future preset time and a preset threshold value, including:

[0029] If the life coefficient of the SCR catalyst at the preset time is less than the first preset threshold value, the early warning level is a normal level;

[0030] If the life coefficient of the SCR catalyst at the future preset time is greater than or equal to the first preset threshold value and less than the second preset threshold value, the early warning level is a slight level;

[0031] If the life coefficient of the SCR catalyst at the future preset time is greater than or equal to the second preset threshold value and less than the third preset threshold value, the early warning level is a general level;

[0032] If the life coefficient of the SCR catalyst at the future preset time is greater than or equal to the third preset threshold value, the early warning level is a serious level.

[0033] The second aspect of the present application provides an SCR catalyst life early warning system, including:

[0034] The operation data acquisition module is configured to acquire real-time operation data of the thermal power generating unit, wherein the real-time operation data comprises a main steam flow and an outlet oxygen concentration.

[0035] The flue gas amount calculation module is configured to calculate a flue gas amount entering the SCR denitration system in the thermal power generating unit according to the real-time operation data, and obtain an import flue gas amount.

[0036] The evaluation standard establishment module is configured to establish an SCR catalyst life monitoring evaluation standard taking a life coefficient as a representation object according to the import flue gas amount, and obtain the life coefficient of the SCR catalyst.

[0037] The early warning level determination module is configured to determine an early warning level according to the life coefficient of the SCR catalyst.

[0038] The third aspect of the present application provides an electronic device, comprising a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to realize the SCR catalyst life early warning method according to any one of the first aspect.

[0039] The fourth aspect of the present application provides a computer readable storage medium, comprising a stored computer program, wherein the computer readable storage medium controls a device where the computer readable storage medium is located to execute the SCR catalyst life early warning method according to any one of the first aspect when the computer program runs.

[0040] Compared with the prior art, the beneficial effects of the embodiment of the present application are as follows:

[0041] The present application provides an SCR catalyst life early warning method, system, device and medium, which does not need to obtain a large amount of historical data for modeling; the flue gas amount is calculated by using a formula, which has better adaptability to various coal-fired furnaces compared with the traditional flue gas amount measuring point or the method of calculating the flue gas amount by using the coal quality entering the furnace; the evaluation index objectively reflecting the current SCR catalyst activity is proposed by acquiring the key indicators of the SCR system and the actual chemical reaction calculation; and the catalyst deactivation time is predicted by using a regression curve, which helps the operation personnel to accurately and timely master the SCR catalyst life. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0043] Figure 1is a flow chart of an SCR catalyst life warning method provided by some embodiments of the present application;

[0044] Figure 2 is a flow chart of step S3 provided by some embodiments of the present application;

[0045] Figure 3 is a flow chart of step S32 provided by some embodiments of the present application;

[0046] Figure 4 is a flow chart of step S4 provided by some embodiments of the present application;

[0047] Figure 5 is a device diagram of an SCR catalyst life warning system provided by some embodiments of the present application;

[0048] Figure 6 is a structural diagram of an electronic device provided by some embodiments of the present application. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings and embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0050] It should be understood that the step numbers used herein are only for the convenience of description, and are not limited to the execution sequence of the steps.

[0051] It should be understood that the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application and the appended claims, unless otherwise clearly indicated by the context, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0052] The terms "comprise" and "include" indicate the presence of described features, whole, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, whole, steps, operations, elements, components and / or sets thereof.

[0053] The term "and / or" refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0054] In an embodiment, as shown in Figure 1 The first aspect of the present application provides an SCR catalyst life warning method, comprising:

[0055] S1. Obtain real-time operating data of the thermal power unit, including main steam flow and outlet oxygen concentration;

[0056] The early warning method in this application is essentially a predictive algorithm. It provides an early warning based on the predicted SCR catalyst lifespan at a future point in time, enabling the unit crew to take appropriate countermeasures according to the warning level. The method used in this application does not require obtaining massive amounts of historical data for modeling to predict SCR catalyst lifespan; instead, it utilizes processed real-time operating data of the thermal power unit to predict the SCR catalyst lifespan, resulting in a more objective outcome. The real-time operating data of the thermal power unit includes, but is not limited to, main steam flow rate and inlet NO₂. x Concentration, export NO x Concentration, outlet oxygen concentration, etc. Here, inlet and outlet refer to the inlet and outlet of the SCR denitrification system in the thermal power unit, and the data acquisition interval is ΔT, but no specific limit is made here.

[0057] S2. Based on real-time operating data, calculate the amount of flue gas entering the SCR denitrification system in the thermal power unit to obtain the inlet flue gas volume; the inlet flue gas volume is calculated using the following formula:

[0058]

[0059] In the formula, Q s For the volume of imported flue gas, m 3 / h; K is a dimensionless empirical constant, with the value for coal-fired boilers taken as 0.81; O2 is the outlet oxygen concentration, %; F is the main steam flow rate, t / h.

[0060] Specifically, due to the large flue size in the SCR denitrification system and the uneven distribution of flue gas velocity within the flue, it is difficult to accurately measure the inlet flue gas volume of the SCR denitrification system. However, calculating the inlet flue gas volume of the SCR denitrification system by using the outlet oxygen concentration and main steam flow rate yields more accurate results compared to traditional methods of measuring flue gas volume at specific points or using the quality of coal entering the furnace. This method is also more adaptable to various coal-fired boilers.

[0061] S3. Establish an SCR catalyst life monitoring and evaluation standard based on the inlet flue gas volume, with the life coefficient as the characterization object, and obtain the life coefficient of the SCR catalyst.

[0062] In one embodiment, step S3 is as follows: Figure 2 As shown, it includes:

[0063] S31. Based on the inlet flue gas volume, calculate the theoretical ammonia reaction rate in the SCR denitrification system, and use the theoretical ammonia reaction rate as the theoretical ammonia demand; the theoretical ammonia demand is calculated using the following formula:

[0064]

[0065] NH 3,d is the theoretical ammonia requirement of the reaction, kg / h; NO x,in is the inlet NO x concentration, mg / m 3 ; is the relative molecular mass of liquid ammonia, g / mol; M NO is the relative molecular mass of nitrogen monoxide, g / mol; is the relative molecular mass of nitrogen monoxide, g / mol.

[0066] Since the relative molecular mass of liquid ammonia and the relative molecular mass of nitrogen monoxide are both known, the above formula can be simplified as:

[0067]

[0068] The present application calculates the theoretical ammonia requirement according to the SCR chemical reaction equilibrium equation. According to the real chemical reactions of NO and NO2 with NH3 in the SCR denitration system, the calculated theoretical ammonia requirement has higher accuracy according to the respective proportions. x

[0069] S32, according to the theoretical ammonia requirement, calculating the SCR catalyst life monitoring evaluation standard taking the life coefficient as the characteristic object, obtaining the life coefficient of the SCR catalyst;

[0070] In an embodiment, if the SCR denitration system includes a liquid ammonia furnace, the real-time operation data further includes the liquid ammonia flow; wherein, step S32 is specifically:

[0071] According to the liquid ammonia flow and the theoretical ammonia requirement, calculating the SCR catalyst life monitoring evaluation standard taking the life coefficient as the characteristic object, obtaining the life coefficient of the SCR catalyst;

[0072] Specifically, for the liquid ammonia furnace, the life coefficient of the SCR catalyst is calculated by the following formula:

[0073]

[0074] NH 3,r is the actual ammonia consumption (liquid ammonia flow), kg / h.

[0075] ​In the liquid ammonia furnace, the liquid ammonia flow is the source of effective reactants in the SCR chemical reaction equilibrium equation, and the liquid ammonia flow is the actual ammonia consumption of the reaction. According to the SCR chemical reaction equilibrium equation, the calculation is traced back to the directly obtainable raw material, the liquid ammonia flow, and the SCR catalyst life monitoring evaluation standard characterized by the life coefficient is calculated according to the liquid ammonia flow and the theoretical ammonia requirement, and the life coefficient of the SCR catalyst is obtained. The obtained result is more accurate. The application obtains the actual chemical reaction calculation through the key indicators of the SCR system, and proposes an evaluation index objectively reflecting the current SCR catalyst activity.

[0076] In an embodiment, if the SCR denitration system includes a urea furnace, the real-time operation data further includes a urea solution flow; wherein, step S32 includes: Figure 3

[0077] S321, according to the urea solution flow, calculating the actual ammonia reaction amount in the SCR denitration system, and taking the actual ammonia reaction amount as the actual ammonia consumption;

[0078] S322, according to the actual ammonia consumption and the theoretical ammonia requirement, calculating the SCR catalyst life monitoring evaluation standard characterized by the life coefficient, and obtaining the life coefficient of the SCR catalyst;

[0079] Specifically, for the urea furnace, since it is the same as the liquid ammonia furnace: the effective reactants in the SCR chemical reaction equilibrium equation are NH3, in order to calculate the life coefficient, the urea in the urea furnace needs to be hydrolyzed into NH3 to obtain the actual ammonia consumption, and the calculation formula is:

[0080]

[0081] In the formula, V CO(NH2)2 is the urea solution volume flow, m 3 / h; p CO(NH2)2 is the density of the urea solution, kg / m 3 ; M CO(NH2)2 is the relative molecular mass of the urea solution, g / mol.

[0082] According to the SCR chemical reaction equilibrium equation, the calculation is traced back to the directly obtainable raw material, the urea solution flow, and the SCR catalyst life monitoring evaluation standard characterized by the life coefficient is calculated according to the urea solution flow (actual ammonia consumption) and the theoretical ammonia requirement, and the life coefficient of the SCR catalyst is obtained. The application innovatively proposes the SCR catalyst life monitoring evaluation standard, i.e. the life coefficient S, which more directly reflects the overall catalytic ability of the SCR catalyst and its change trend.

[0083] Further, after step S3, the inlet NO​x Concentration and outlet NO x Concentration calculates SCR denitration efficiency, and determines the actual ammonia injection amount as the optimal ammonia injection amount according to the SCR denitration efficiency, and then establishes the SCR catalyst life prediction and early warning curve; wherein, the calculation formula of SCR denitration efficiency is as follows:

[0084]

[0085] In the formula, η is the SCR denitration efficiency, %; NO x,out is the outlet NO x concentration, mg / m 3 .

[0086] For a thermal power unit, the unit operation needs to meet the NO x environmental protection index emission limit value, the present application adopts SCR outlet NO x concentration setting value control, and ensures that the emission meets the standard by changing the ammonia injection amount. Due to the consideration of operation cost and the increase of ammonia escape rate which will lead to safety hidden danger of subsequent equipment operation, such as the reason of air preheater sulfuric acid hydrogen ammonium blockage, the ammonia injection amount will not be increased infinitely. According to the SCR denitration reaction mechanism, under certain flue gas conditions, with the increase of ammonia injection amount, the denitration efficiency gradually increases, and the ammonia escape rate is basically unchanged; when the ammonia injection amount reaches a certain limit value, the denitration efficiency no longer increases, and the ammonia escape rate begins to rise; therefore, the actual ammonia injection amount of the thermal power unit is generally the optimal ammonia injection amount which can ensure that the emission meets the standard and the minimum ammonia escape rate.

[0087] For a certain amount of NO x , before the denitration reaction reaches saturation, with the increase of ammonia injection amount, the denitration efficiency rises, and at this time there is basically no ammonia escape (i.e. unreacted ammonia escapes from the outlet); when the ammonia injection amount increases to a certain limit value, the denitration efficiency reaches the peak, and the ammonia escape begins to increase, and this limit value is the optimal ammonia injection amount; after that, further increasing the ammonia injection amount, the denitration efficiency maintains the peak, but the ammonia escape further increases and affects the safety of subsequent equipment. In the actual operation process, the operator will try to control the balance between ammonia escape and denitration efficiency, that is, to meet the optimal ammonia injection amount. Only when the actual ammonia injection amount meets the optimal ammonia injection amount, the actual ammonia injection amount can accurately reflect the performance of the SCR catalyst. If the optimal ammonia injection amount is not met, it means that as long as a certain ammonia escape is sacrificed, the ammonia injection is as much as possible, and the environmental protection requirements can also be met. Due to the over-saturation of the catalytic reaction, the life coefficient calculated at this time cannot represent the activity state of the catalyst. Therefore, by checking the denitration efficiency, it can be determined whether the current working condition ammonia injection amount reaches the optimal ammonia injection amount. If the denitration efficiency suddenly decreases at a certain moment, it means that the optimal ammonia injection amount is not reached, and this point can be considered as invalid data.

[0088] S4, determining the early warning level according to the life coefficient of the SCR catalyst;

[0089] In an embodiment, step S4 comprises, as shown in the figure: Figure 4

[0090] S41, generating a life prediction curve according to the life coefficient of the SCR catalyst within a preset period;

[0091] S42, predicting the life of the SCR catalyst at a future preset time according to the life prediction curve, to obtain a life coefficient of the SCR catalyst at the future preset time;

[0092] S43, determining a warning level according to the relationship between the life coefficient of the SCR catalyst at the future preset time and a preset threshold value;

[0093] Specifically, the present application can make a time-life coefficient scatter plot according to the time stamp and the life coefficient of the algorithm, and fit a real-time life prediction curve at the time:

[0094] S = AT + B

[0095] In the formula, A and B are fitting formula constants.

[0096] According to the relationship between the life coefficient and the time, the present application establishes an SCR catalyst life prediction warning curve, and the current time is brought into the formula to obtain the currently predicted life coefficient; if the life coefficient at a future time is to be predicted, the time corresponding to the time is brought into the formula to calculate.

[0097] In an embodiment, the preset threshold value includes a first preset threshold value, a second preset threshold value and a third preset threshold value; wherein step S43 comprises:

[0098] If the life coefficient of the SCR catalyst at the future preset time is less than the first preset threshold value, the warning level is normal level;

[0099] If the life coefficient of the SCR catalyst at the future preset time is greater than or equal to the first preset threshold value and less than the second preset threshold value, the warning level is slight level;

[0100] If the life coefficient of the SCR catalyst at the future preset time is greater than or equal to the second preset threshold value and less than the third preset threshold value, the warning level is general level;

[0101] If the life coefficient of the SCR catalyst at the preset time is greater than or equal to the third preset threshold value, the warning level is serious level.

[0102] ​Wherein, the life coefficient S=0 is taken as the moment when the catalytic ability is maximum, at which time the actual ammonia injection amount is equal to the theoretical ammonia injection amount, and the increase of the life coefficient is linearly positively correlated with the decline of the catalytic ability, the first preset threshold is preferably 10, the second preset threshold is preferably 15, and the third preset threshold is preferably 20. Meanwhile, since the catalytic ability of the SCR catalyst slowly declines over time, S=20 is brought into the current fitting formula to obtain the predicted deactivation time of the SCR catalyst, and the operation personnel can adjust the unit operation mode or adjust the SCR catalyst replacement plan in advance in a timely manner according to the current predicted life coefficient and the predicted deactivation time, so as to avoid the operation safety problem caused by the failure to replace in time. After the predicted deactivation time is calculated according to the fitting formula, the SCR catalyst life can be prolonged by means of strengthening catalyst cleaning and optimizing operation, and the economy of the unit operation is considered as a whole.

[0103] In the embodiment of the present application, the existing SCR catalyst life prediction efficiency is low, a large amount of historical data is required, a large amount of time and computing power is consumed, and the operation personnel cannot accurately and timely grasp the SCR catalyst activity. In order to solve the above problems, an SCR catalyst life warning method is designed, which realizes obtaining real-time operation data of a thermal power generating unit, the real-time operation data including main steam flow and outlet oxygen concentration; according to the real-time operation data, the flue gas amount entering the SCR denitration system in the thermal power generating unit is calculated to obtain the import flue gas amount; the SCR catalyst life monitoring and evaluation standard taking the life coefficient as the representation object is established according to the import flue gas amount to obtain the life coefficient of the SCR catalyst; and the technical scheme for determining the warning level according to the life coefficient of the SCR catalyst is realized. Without obtaining a large amount of historical data for modeling, the SCR system key indicators are obtained and the actual chemical reaction calculation is performed, the evaluation index objectively reflecting the current SCR catalyst activity is proposed, and the catalyst deactivation time is predicted by using the regression curve to help the operation personnel accurately and timely grasp the SCR catalyst life.

[0104] It should be noted that although each step in the above flowchart is displayed in sequence according to the arrow indication, these steps are not necessarily executed in sequence according to the arrow indication. Unless explicitly stated herein, the execution of these steps has no strict order limitation, and these steps can be executed in other orders.

[0105] In another embodiment, as shown in FIG. 2, the second aspect of the present application provides an SCR catalyst life warning system, which comprises: Figure 5

[0106] The operation data acquisition module 10 is used to acquire real-time operation data of a thermal power generating unit, the real-time operation data including main steam flow and outlet oxygen concentration;

[0107] ​The flue gas amount calculation module 20 is configured to calculate flue gas amount entering the SCR denitration system in the thermal power generating unit according to real-time operation data, and obtain the import flue gas amount.

[0108] The evaluation standard establishment module 30 is configured to establish an SCR catalyst life monitoring evaluation standard taking the life coefficient as a representation object according to the import flue gas amount, and obtain the life coefficient of the SCR catalyst.

[0109] The early warning level determination module 40 is configured to determine the early warning level according to the life coefficient of the SCR catalyst.

[0110] It should be noted that the above-mentioned various modules in the SCR catalyst life early warning system can be realized by software, hardware and combinations thereof, in whole or in part. The above-mentioned various modules can be embedded in or independent of the processor in the computer device in hardware form, or can be stored in the memory in the computer device in software form, so as to be called and executed by the processor to perform the operations corresponding to the above-mentioned various modules. For specific limitations of the SCR catalyst life early warning system, refer to the limitations of the SCR catalyst life early warning method in the above, both of which have the same functions and effects, and will not be described here.

[0111] The third aspect of the application provides an electronic device, which comprises:

[0112] a processor, a memory and a bus;

[0113] the bus is configured to connect the processor and the memory;

[0114] the memory is configured to store operation instructions;

[0115] the processor is configured to execute the operations corresponding to the SCR catalyst life early warning method according to the operation instructions.

[0116] In an optional embodiment, an electronic device is provided, which comprises: Figure 6 as shown in the figure, Figure 6 The electronic device 5000 shown in the figure comprises a processor 5001 and a memory 5003. The processor 5001 and the memory 5003 are connected, for example, through a bus 5002. Optionally, the electronic device 5000 can further comprise a transceiver 5004. It should be noted that in actual application, the transceiver 5004 is not limited to one, and the structure of the electronic device 5000 does not constitute a limitation on the embodiments of the application.

[0117] The processor 5001 can be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in conjunction with the disclosure. The processor 5001 can also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0118] The bus 5002 can include a path for transmitting information between the above-mentioned components. The bus 5002 can be a PCI bus or an EISA bus, etc. The bus 5002 can be divided into an address bus, a data bus, a control bus, etc. For convenience of representation, Figure 6 In the figure, only one thick line is used, but it does not mean that there is only one bus or one type of bus.

[0119] The memory 5003 can be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an EEPROM, a CD-ROM or other optical disk storage, an optical disk storage (including a compact disk, a laser disk, an optical disk, a digital versatile disk, a Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but not limited to this.

[0120] The memory 5003 is used to store application program codes for implementing the scheme of the present application, and is controlled by the processor 5001 for execution. The processor 5001 is used to execute the application program codes stored in the memory 5003 to realize the content shown in any of the preceding method embodiments.

[0121] The electronic device includes, but is not limited to, a mobile terminal such as a mobile phone, a notebook computer, a digital broadcast receiver, a PDA (Personal Digital Assistant), a PAD (Tablet Personal Computer), a PMP (Portable Multimedia Player), a car terminal (such as a car navigation terminal), and the like, and a fixed terminal such as a digital TV, a desktop computer, and the like.

[0122] The fourth aspect of the present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and the program is executed by a processor to implement the SCR catalyst life warning method of the first aspect of the present application.

[0123] Another embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and when the computer program is run on a computer, the computer can execute the corresponding content in the preceding method embodiments.

[0124] In addition, an embodiment of the present application also provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the method.

[0125] To sum up, the present application provides an SCR catalyst life warning method, system, device and medium, which does not need to obtain a large amount of historical data for modeling; the flue gas amount is calculated by using a formula, which has better adaptability to various coal-fired furnaces compared with the traditional flue gas amount measuring point or the method of calculating the flue gas amount by using the coal quality into the furnace, the evaluation index objectively reflecting the current SCR catalyst activity is proposed by acquiring the key indicators of the SCR system and the actual chemical reaction calculation, and the catalyst deactivation time is predicted by using the regression curve, which helps the operation personnel accurately and timely master the SCR catalyst life.

[0126] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other, and each embodiment mainly describes the difference from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the related parts can be referred to the part of the method embodiment. It should be noted that, each of the technical features of the above embodiments can be combined arbitrarily, in order to make the description simple, each of the technical features of the above embodiments is not described all possible combinations, however, as long as the combination of these technical features does not exist contradictory, it should be considered that it is within the scope of the present application.

[0127] The above-described embodiments only express several preferred embodiments of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the protection scope of the claims.

Claims

1. A method for early warning of SCR catalyst lifetime, characterized in that, include: Acquire real-time operating data of the thermal power unit, including main steam flow and outlet oxygen concentration; Based on the real-time operating data, the amount of flue gas entering the SCR denitrification system of the thermal power unit is calculated to obtain the inlet flue gas volume; the inlet flue gas volume is calculated using the following formula: In the formula, Q s Where: is the inlet flue gas volume; K is a dimensionless empirical constant; O2 is the outlet oxygen concentration; F is the main steam flow rate. Based on the aforementioned inlet flue gas volume, an SCR catalyst life monitoring and evaluation standard with life coefficient as the characterization object is established to obtain the SCR catalyst life coefficient. The warning level is determined based on the lifetime coefficient of the SCR catalyst; The establishment of an SCR catalyst life monitoring and evaluation standard based on the inlet flue gas volume, characterized by a life coefficient, yields the SCR catalyst life coefficient, including: Based on the inlet flue gas volume, calculate the theoretical ammonia reaction volume in the SCR denitrification system, and use the theoretical ammonia reaction volume as the theoretical ammonia demand. Based on the theoretical ammonia requirement, the lifetime monitoring and evaluation standard of the SCR catalyst, characterized by the lifetime coefficient, is calculated to obtain the lifetime coefficient of the SCR catalyst.

2. The SCR catalyst lifetime early warning method according to claim 1, characterized in that, If the SCR denitrification system includes a liquid ammonia furnace, then the real-time operating data also includes the liquid ammonia flow rate; wherein, The SCR catalyst lifetime monitoring and evaluation standard, characterized by a lifetime factor, is calculated based on the theoretical ammonia demand to obtain the lifetime factor of the SCR catalyst. Specifically: Based on the liquid ammonia flow rate and the theoretical ammonia requirement, the SCR catalyst lifetime monitoring and evaluation standard, characterized by the lifetime coefficient, is calculated to obtain the lifetime coefficient of the SCR catalyst.

3. The SCR catalyst lifetime early warning method according to claim 1, characterized in that, If the SCR denitrification system includes a urea furnace, then the real-time operating data also includes the urea solution flow rate; wherein, The step involves calculating the SCR catalyst lifetime monitoring and evaluation criteria, characterized by a lifetime factor, based on the theoretical ammonia demand, to obtain the SCR catalyst lifetime factor, including: Based on the urea solution flow rate, calculate the actual ammonia reaction amount in the SCR denitrification system, and use the actual ammonia reaction amount as the actual ammonia consumption. Based on the actual ammonia consumption and the theoretical ammonia requirement, the SCR catalyst lifetime monitoring and evaluation standard, characterized by the lifetime coefficient, is calculated to obtain the lifetime coefficient of the SCR catalyst.

4. The SCR catalyst lifetime early warning method according to claim 1, characterized in that, The determination of the warning level based on the lifetime coefficient of the SCR catalyst includes: Based on the lifetime coefficient of the SCR catalyst within a preset time period, a lifetime prediction curve is generated; The lifetime of the SCR catalyst at a predetermined future time is predicted based on the lifetime prediction curve, and the lifetime coefficient of the SCR catalyst at that predetermined future time is obtained. The warning level is determined based on the relationship between the lifetime coefficient of the SCR catalyst at the predetermined future time and a predetermined threshold.

5. The SCR catalyst lifetime early warning method according to claim 4, characterized in that, The preset thresholds include a first preset threshold, a second preset threshold, and a third preset threshold; The step of determining the warning level based on the relationship between the lifetime coefficient of the SCR catalyst at the preset time and a preset threshold includes: If the lifetime coefficient of the SCR catalyst at the future preset time is less than the first preset threshold, then the warning level is the normal level. If the lifetime coefficient of the SCR catalyst at the future preset time is greater than or equal to the first preset threshold and less than the second preset threshold, then the warning level is a minor level. If the lifetime coefficient of the SCR catalyst at the future preset time is greater than or equal to the second preset threshold and less than the third preset threshold, then the warning level is a general level. If the lifetime coefficient of the SCR catalyst at the predetermined future time is greater than or equal to the third predetermined threshold, then the warning level is a severe level.

6. An SCR catalyst lifetime early warning system, characterized in that, include: The operation data acquisition module is used to acquire real-time operation data of the thermal power unit, including main steam flow and outlet oxygen concentration; The flue gas volume calculation module is used to calculate the amount of flue gas entering the SCR denitrification system of the thermal power unit based on the real-time operating data, thereby obtaining the inlet flue gas volume; the inlet flue gas volume is calculated using the following formula: In the formula, Q s Where: is the inlet flue gas volume; K is a dimensionless empirical constant; O2 is the outlet oxygen concentration; F is the main steam flow rate. The evaluation standard establishment module is used to establish an SCR catalyst life monitoring and evaluation standard with life coefficient as the characterization object based on the inlet flue gas volume, and obtain the life coefficient of the SCR catalyst. The warning level determination module is used to determine the warning level based on the lifetime coefficient of the SCR catalyst; The establishment of an SCR catalyst life monitoring and evaluation standard based on the inlet flue gas volume, characterized by a life coefficient, yields the SCR catalyst life coefficient, including: Based on the inlet flue gas volume, calculate the theoretical ammonia reaction volume in the SCR denitrification system, and use the theoretical ammonia reaction volume as the theoretical ammonia demand. Based on the theoretical ammonia requirement, the lifetime monitoring and evaluation standard of the SCR catalyst, characterized by the lifetime coefficient, is calculated to obtain the lifetime coefficient of the SCR catalyst.

7. An electronic device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor, when executing the computer program, implements the SCR catalyst lifetime warning method as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the SCR catalyst lifetime early warning method as described in any one of claims 1 to 5.

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