An energy-saving operation system for thermal power

Abstract

The present invention discloses an energy-saving operation system for thermal power energy, which relates to the technical field of thermal power generation. By obtaining specific fuel optimization parameters, the combustion characteristics of the fuel are accurately evaluated. The fuel optimization parameters directly affect the combustion efficiency of the fuel and the operation stability of the system. The average particle size of the fuel affects the combustion rate, the volatile content determines the ignition performance and combustion stability, and the moisture content affects the calorific value and combustion effect. Thereby, it is beneficial to select and optimize suitable fuels, improve the combustion efficiency and energy utilization rate. By analyzing the comprehensive fuel qualification index, it is judged whether the specified fuel meets the energy-saving requirements, which is beneficial to avoid using fuels that do not meet the standards, thereby reducing the problems of low combustion efficiency and energy waste caused by unqualified fuels, and enhancing the overall energy-saving effect of thermal power generation. By collecting the combustion efficiency parameters and then calculating the combustion efficiency evaluation index, it is beneficial to accurately evaluate the actual efficiency during the combustion process.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation, and particularly to an energy-saving operation system for thermal power energy. Background Art

[0002] With the development of the economy and the growth of the population, the energy demand continues to rise, especially the increasing demand for electricity. As one of the main sources of electricity, thermal power generation faces huge energy production pressure. To meet this demand, thermal power plants need to improve operating efficiency and reduce energy waste.

[0003] The prior art, such as the invention patent application with the publication number CN117522447A, discloses an energy-saving operation system for thermal power energy, including a thermal power operation library. A strategy database is preset in the thermal power operation library, and the strategy database includes deviation information and operation strategies. It also includes a model construction module for constructing monitoring models corresponding to each component in the thermal power unit through different data sets, a data acquisition module for obtaining the actual parameter values collected by data sensors in each component of the thermal power unit, a data verification module for substituting the actual parameter values into the corresponding monitoring models to obtain deviation values, and an operation regulation module for indexing the corresponding operation strategies in the strategy database according to the deviation values to adjust the electricity trading results and energy storage results.

[0004] Regarding the above solution, the applicant of the present invention found that the above technology has at least the following technical problems: 1. The above system designs model construction, data acquisition and verification modules, and an operation regulation module to dynamically adjust operation strategies, but does not elaborate in detail how the models and strategies ensure the realization of energy-saving effects. Energy conservation is not only achieved by dynamically adjusting operation strategies, but also requires specific energy-saving parameters and evaluation indicators. For example, the specific roles and optimization methods of flue gas temperature and boiler shell temperature in the energy-saving process are not elaborated in detail.

[0005] 2. The above system mentions that the operation regulation module adjusts electricity trading and energy storage results according to deviation values, but does not clearly describe how these adjustments affect the overall energy efficiency and the realization of energy-saving goals. Energy conservation is not only achieved by adjusting electricity trading, but also requires combining specific energy consumption data and energy-saving indicators to quantify the energy-saving effect, and the above system does not mention how to effectively integrate and cooperate with fuel management, combustion efficiency analysis, and heat recovery process analysis. In practical applications, the energy-saving operation of thermal power energy not only depends on the adjustment of internal operation strategies, but also needs to consider fuel selection, the efficiency of the combustion process, and the optimization of heat energy recovery. Summary of the Invention

[0006] The object of the present invention is to provide an energy-saving operation system for thermal power energy, which solves the problems existing in the background art.

[0007] To solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides an energy-saving operation system for thermal power energy, including: a fuel management module, which is used to obtain the fuel optimization parameters corresponding to the specified fuel used in thermal power generation, and then analyze whether the specified fuel used in thermal power generation meets the requirements of energy-saving fuel.

[0008] A combustion efficiency analysis module, which is used to collect the combustion efficiency parameter information corresponding to the specified fuel during the combustion process when the specified fuel used in thermal power generation meets the requirements of energy-saving fuel, and then calculate the combustion efficiency evaluation index corresponding to the specified fuel during the combustion process.

[0009] A heat recovery process analysis module, which is used to collect the energy-saving parameters corresponding to the heat recovery process during the combustion of the specified fuel, and then calculate the energy-saving evaluation index corresponding to the heat recovery process.

[0010] A dynamic combustion analysis module, which is used to analyze the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process according to the combustion efficiency evaluation index corresponding to the specified fuel during the combustion process and the energy-saving evaluation index corresponding to the heat recovery process, and thus analyze whether the combustion performance corresponding to the specified fuel during the combustion process meets the requirements of energy-saving combustion.

[0011] An early warning terminal, which is used to give an early warning prompt when the specified fuel used in thermal power generation does not meet the requirements of energy-saving fuel and the combustion performance corresponding to the specified fuel during the combustion process does not meet the requirements of energy-saving combustion.

[0012] Preferably, the analysis of whether the specified fuel used in thermal power generation meets the requirements of energy-saving fuel is as follows: According to the average particle size, volatile content and moisture content corresponding to the specified fuel used in thermal power generation, analyze the comprehensive fuel qualification index corresponding to the specified fuel used in thermal power generation. The comprehensive fuel qualification index includes values of 0 and 1. When the comprehensive fuel qualification index is 0, it indicates that the specified fuel used in thermal power generation does not meet the requirements of energy-saving fuel. When the comprehensive fuel qualification index is 1, it indicates that the specified fuel used in thermal power generation meets the requirements of energy-saving fuel.

[0013] Preferably, the analysis of the comprehensive fuel qualification index corresponding to the specified fuel used in thermal power generation is as follows: Obtain the standard fuel optimization parameters corresponding to the fuel used in thermal power generation from the database. The standard fuel optimization parameters include the standard average particle size, standard volatile content and standard moisture content, which are respectively denoted as 、 and ;

[0014] According to the fuel qualification evaluation expression: , obtain the comprehensive fuel qualification index corresponding to the specified fuel used in thermal power generation, where , , respectively represent the average particle size, volatile content, and moisture content corresponding to the designated fuel used for thermal power generation. , , are respectively the weighting factors corresponding to the set average particle size, the weighting factor corresponding to the volatile content, and the weighting factor corresponding to the moisture content. represents the set standard comprehensive fuel qualification index range.

[0015] The beneficial effects of the present invention are as follows: 1. An energy-saving operation system for thermal power generation provided by the present invention, by obtaining specific fuel optimization parameters, accurately evaluates the combustion characteristics of the fuel. The fuel optimization parameters directly affect the combustion efficiency of the fuel and the operation stability of the system. The average particle size of the fuel affects the combustion rate, the volatile content determines the ignition property and combustion stability, and the moisture content affects the calorific value and combustion effect. Therefore, it is beneficial to select and optimize suitable fuels, improve the combustion efficiency and energy utilization rate. By analyzing the comprehensive fuel qualification index, it is possible to determine whether the designated fuel meets the energy-saving requirements, which is beneficial to avoiding the use of non-standard fuels, thereby reducing the problems of low combustion efficiency and energy waste caused by unqualified fuels, and improving the overall energy-saving effect of thermal power generation.

[0016] 2. In the monitoring of the fuel combustion process in the embodiments of the present invention, by collecting combustion efficiency parameters and then calculating the combustion efficiency evaluation index, it is beneficial to accurately evaluate the actual efficiency during the combustion process, thereby providing data support for the regulation of the combustion process, ensuring that the combustion efficiency meets the expected standard, and avoiding energy loss. In the heat recovery process, by calculating the energy-saving evaluation index of the heat recovery process and analyzing the flue gas discharge temperature, flue gas inlet temperature, and adiabatic layer thickness, it helps to identify and improve the energy loss problem in the heat recovery process.

[0017] 3. In the dynamic combustion analysis module of the embodiments of the present invention, by comprehensively considering the combustion efficiency and the energy-saving index of the heat recovery process, and then comprehensively evaluating the comprehensive performance of the fuel, it helps to identify potential problems in the combustion process, formulate corresponding optimization measures, and ensure the overall improvement of the performance during the fuel combustion process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1This is a schematic diagram of the system structure connection of the present invention. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] Please refer to Figure 1 As shown, the present invention provides an energy-saving operation system for thermal power energy, and the system includes: a fuel management module, a combustion efficiency analysis module, a heat recovery process analysis module, a dynamic combustion analysis module, a warning terminal, and a database.

[0022] The fuel management module is respectively connected to the combustion efficiency analysis module and the database, the combustion efficiency analysis module is respectively connected to the heat recovery process analysis module and the database, the heat recovery process analysis module is connected to the dynamic combustion analysis module, and the dynamic combustion analysis module is respectively connected to the warning terminal and the database.

[0023] The fuel management module is used to obtain the fuel optimization parameters corresponding to the specified fuel used for thermal power generation, and then analyze whether the specified fuel used for thermal power generation meets the requirements of energy-saving fuels.

[0024] In a specific embodiment, the process of obtaining the fuel optimization parameters corresponding to the specified fuel used for thermal power generation is as follows: The fuel optimization parameters include the average particle size, volatile content, and moisture content. Samples are taken from the specified fuel to obtain each sample to be detected. Each sample to be detected is equally divided into three equal parts, which are respectively recorded as each first sample to be detected, each second sample to be detected, and each third sample to be detected. Each first sample to be detected is respectively placed in each standard pore sieve. According to the specified fuel particles in each first sample to be detected after screening, the particle sizes corresponding to the specified fuel particles in each first sample to be detected are statistically obtained. The average particle size corresponding to the specified fuel is obtained by calculating the mean value of the particle sizes corresponding to the specified fuel particles in each first sample to be detected.

[0025] Each second sample to be detected is respectively crushed to a set particle size, and the mass of each second sample to be detected is recorded, which is recorded as each previous mass. Each second sample to be detected after crushing is respectively heated to a set volatile temperature value and maintained for a set duration, and then the mass corresponding to each second sample to be detected after heating is recorded, which is recorded as each subsequent mass. The difference between each previous mass and each subsequent mass is calculated correspondingly, and the obtained results are calculated by taking the mean value, and then the volatile content corresponding to the specified fuel is obtained.

[0026] Crush each third sample to be detected according to the volatile content detection method, record the mass of each third sample to be detected before heating, and then heat each crushed third sample to be detected to a set temperature, record the mass of each third sample to be detected after heating, perform a corresponding subtraction calculation on the masses of each third sample to be detected before and after heating, and calculate the mean of the obtained results, so as to obtain the moisture content of the specified fuel.

[0027] It should be noted that mass refers to weight. The average particle size affects the combustion efficiency and uniformity of the fuel, the volatile content is related to the combustion characteristics and calorific value of the fuel, and the moisture content directly affects the calorific value of the fuel and the energy efficiency during combustion. The volatile content refers to the percentage of the mass of the gas and steam volatilized from the fuel during heating in the total mass of the fuel. The volatile content refers to the proportion of volatile substances in the fuel. Volatile substances will be converted into gas or steam during heating. Volatile substances mainly include moisture and low-boiling organic compounds, etc. The level of the volatile content has an important impact on the combustion characteristics of the fuel. Fuels with high volatile content have good ignition properties and complete combustion.

[0028] In a specific embodiment, to analyze whether the specified fuel used for thermal power generation meets the requirements of energy-saving fuel, the specific analysis process is as follows: According to the average particle size, volatile content and moisture content of the specified fuel used for thermal power generation, analyze the comprehensive fuel qualification index corresponding to the specified fuel used for thermal power generation. The comprehensive fuel qualification index includes values of 0 and 1. When the comprehensive fuel qualification index is 0, it indicates that the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuel. When the comprehensive fuel qualification index is 1, it indicates that the specified fuel used for thermal power generation meets the requirements of energy-saving fuel.

[0029] It should be noted that when the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuel, by replacing the fuel, after replacing the fuel, analyze according to the above analysis process of the comprehensive fuel qualification index until the fuel used for thermal power generation meets the requirements of energy-saving fuel.

[0030] In a specific embodiment, to analyze the comprehensive fuel qualification index corresponding to the specified fuel used for thermal power generation, the specific analysis process is as follows: Obtain the standard fuel optimization parameters corresponding to the fuel used for thermal power generation from the database. The standard fuel optimization parameters include the standard average particle size, standard volatile content and standard moisture content, which are respectively denoted as 、 and .

[0031] According to the fuel qualification evaluation expression: , obtain the comprehensive fuel qualification index corresponding to the specified fuel used for thermal power generation, where , , respectively represent the average particle size, volatile content, and moisture content corresponding to the designated fuel used for thermal power generation. , , are respectively the weight factors corresponding to the set average particle size, the weight factor corresponding to the volatile content, and the weight factor corresponding to the moisture content. represents the set standard comprehensive fuel qualification index range.

[0032] It should be noted that, for example: when is represented as the interval , the value is 6, it indicates that the designated fuel used for thermal power generation does not meet the requirements of energy-saving fuel. , , take values all greater than and less than .

[0033] It also should be noted that when obtaining from the database the number of times that the average particle size of the designated fuel used for thermal power generation does not meet the standard average particle size requirement, the number of times that the volatile content does not meet the standard volatile content requirement, and the number of times that the moisture content does not meet the standard moisture content requirement, sum them up to get the total number of times. Divide the number of times that the average particle size does not meet the standard average particle size requirement, the number of times that the volatile content does not meet the standard volatile content requirement, and the number of times that the moisture content does not meet the standard moisture content requirement by the total number of times respectively. The results obtained are the weight factors corresponding to the set average particle size, the weight factor corresponding to the volatile content, and the weight factor corresponding to the moisture content.

[0034] The combustion efficiency analysis module is used to collect the combustion efficiency parameter information corresponding to the designated fuel during the combustion process when the designated fuel used for thermal power generation meets the requirements of energy-saving fuel, and then calculate the combustion efficiency evaluation index corresponding to the combustion process of the designated fuel.

[0035] In a specific embodiment, the process of collecting the combustion efficiency parameter information corresponding to the designated fuel during the combustion process is as follows: The combustion efficiency parameter information includes air ratio, combustion temperature, and oxygen concentration. During the combustion process, the air flow sensor monitors the amount of air entering the combustion chamber within a set time period, and records the total fuel supply amount corresponding to the set time period. Divide the amount of air entering the combustion chamber within the set time period by the total fuel supply amount corresponding to the set time period, and the result obtained is the air ratio corresponding to the combustion process of the designated fuel.

[0036] According to the set collection time points, the temperature at the bottom of the combustion chamber is monitored by a temperature sensor at the corresponding temperature of each collection time point. The result obtained by calculating the average value of the temperatures corresponding to each collection time point is the combustion temperature corresponding to the specified fuel combustion process. An oxygen concentration sensor is installed at the outlet of the combustion chamber to monitor the oxygen concentration corresponding to each collection time point. The result obtained by calculating the average value is the oxygen concentration corresponding to the specified fuel combustion process.

[0037] In a specific embodiment, the calculation of the combustion efficiency evaluation index corresponding to the specified fuel combustion process is as follows: Obtain the standard combustion efficiency parameter information corresponding to the specified fuel combustion process from the database. The standard combustion efficiency parameter information includes the standard air ratio, the standard combustion temperature, and the standard oxygen concentration.

[0038] Through the calculation formula , the combustion efficiency evaluation index corresponding to the specified fuel combustion process is obtained , where , , respectively represent the air ratio, the combustion temperature, and the oxygen concentration corresponding to the specified fuel combustion process, , , respectively represent the standard air ratio, the standard combustion temperature, and the standard oxygen concentration, , , are the weight factors corresponding to the set air ratio, the weight factor corresponding to the combustion temperature, and the weight factor corresponding to the oxygen concentration, respectively.

[0039] It should be noted that , , are all greater than and less than .

[0040] It should also be noted that the weight factor corresponding to the historical air ratio, the weight factor corresponding to the historical combustion temperature, and the weight factor corresponding to the historical oxygen concentration corresponding to the historical combustion efficiency evaluation index are obtained from the database. The median is selected respectively from the weight factor corresponding to the historical air ratio, the weight factor corresponding to the historical combustion temperature, and the weight factor corresponding to the historical oxygen concentration. The result obtained is the weight factor corresponding to the set air ratio, the weight factor corresponding to the combustion temperature, and the weight factor corresponding to the oxygen concentration.

[0041] The heat recovery process analysis module is used to collect the energy-saving parameters corresponding to the heat recovery process during the combustion of the specified fuel, and then calculate the energy-saving evaluation index corresponding to the heat recovery process.

[0042] In the embodiments of the present invention, during the monitoring of the fuel combustion process, by collecting the combustion efficiency parameters and then calculating the combustion efficiency evaluation index, it is beneficial to accurately evaluate the actual efficiency during the combustion process, thereby providing data support for the regulation of the combustion process, ensuring that the combustion efficiency meets the expected standards, and avoiding energy loss. During the heat recovery process, by calculating the energy-saving evaluation index of the heat recovery process and analyzing the flue gas discharge temperature, the flue gas inlet temperature, and the thickness of the insulation layer, it helps to identify and improve the energy loss problems in the heat recovery process.

[0043] In a specific embodiment, the energy-saving parameters corresponding to the heat recovery process during the combustion of the specified fuel are collected, and the specific collection process is as follows: The energy-saving parameters include the flue gas discharge temperature, the flue gas inlet temperature, and the thickness of the insulation layer. According to the set time points, thermocouples installed in the boiler flue are used to monitor the flue gas discharge temperature corresponding to each time point, and thermocouples are installed in the boiler inlet flue to monitor the flue gas inlet temperature corresponding to each time point. The average values of the flue gas discharge temperature corresponding to each time point and the flue gas inlet temperature corresponding to each time point are calculated, and the results obtained are the flue gas discharge temperature and the flue gas inlet temperature corresponding to the heat recovery process during the combustion of the specified fuel. The thickness of the insulation layer is obtained from the boiler design specification.

[0044] It should be noted that the flue gas discharge temperature directly reflects the heat loss of the boiler. The flue gas discharge temperature represents the temperature of the flue gas discharged from the boiler. A higher flue gas discharge temperature means a lower heat recovery efficiency of the boiler. Reducing the flue gas discharge temperature can improve the energy efficiency of the boiler. The flue gas inlet temperature is the basis for the boiler system design and heat recovery efficiency calculation. The flue gas inlet temperature affects the heat transfer and utilization inside the boiler. A higher flue gas inlet temperature can provide more recoverable heat, thereby improving the efficiency of the heat recovery device. The thickness of the insulation layer determines the heat insulation effect of the boiler. The thicker the insulation layer, the less the heat loss.

[0045] In a specific embodiment, the energy-saving evaluation index corresponding to the heat recovery process is calculated, and the specific calculation process is as follows: Through the calculation formula , the energy-saving evaluation index corresponding to the heat recovery process is obtained , where , , and respectively represent the flue gas inlet temperature, the flue gas discharge temperature, the ambient temperature, and the boiler shell temperature, , , and respectively represent the thermal conductivity of the insulation material, the surface area of the boiler shell, the total input heat of the boiler, and the thickness of the insulation layer.

[0046] It should be noted that the temperature of the boiler's surrounding environment and the boiler shell is monitored through a temperature sensor to obtain the ambient temperature and the temperature of the boiler shell. The thermal conductivity corresponding to the thermal insulation material used on the boiler surface and the surface area of the boiler shell are obtained from the boiler design specifications, and the total heat input corresponding to the specified fuel during combustion is obtained from the database.

[0047] The dynamic combustion analysis module is used to analyze the comprehensive performance evaluation coefficient corresponding to the specified fuel during combustion based on the combustion efficiency evaluation index corresponding to the specified fuel during combustion and the energy-saving evaluation index corresponding to the heat recovery process, thereby analyzing whether the combustion performance corresponding to the specified fuel during combustion meets the requirements of energy-saving combustion.

[0048] It should be noted that fuel performance refers to the comprehensive performance of fuel in the process of use, including its combustion efficiency, calorific value, stability, emission characteristics, and handling difficulty. It not only involves how effectively the fuel is converted into heat energy, that is, the combustion efficiency, but also includes other characteristics of the fuel, such as the emissions generated, its performance in the burner, and the ease of handling and storage. Fuel performance is an indicator for evaluating the overall applicability and benefits of fuel, covering all aspects from the combustion process to the environmental impact.

[0049] In a specific embodiment, the specific calculation process for analyzing the comprehensive performance evaluation coefficient corresponding to the specified fuel during combustion is as follows: Substitute the combustion efficiency evaluation index corresponding to the specified fuel during combustion and the energy-saving evaluation index corresponding to the heat recovery process into the calculation formula to obtain the comprehensive performance evaluation coefficient corresponding to the specified fuel during combustion , where and are the weight factors corresponding to the set combustion efficiency evaluation index and the weight factor corresponding to the energy-saving evaluation index, respectively.

[0050] It should be noted that and both take values greater than and less than .

[0051] It should also be noted that the number of times the combustion efficiency evaluation index corresponding to the specified fuel during combustion does not meet the requirements of energy-saving combustion and the number of times the energy-saving evaluation index does not meet the requirements of energy-saving combustion are obtained from the database, and the total number is obtained by accumulation. Divide the number of times the combustion efficiency evaluation index does not meet the requirements of energy-saving combustion and the number of times the energy-saving evaluation index does not meet the requirements of energy-saving combustion by the total number respectively, and the results obtained are the weight factor corresponding to the set combustion efficiency evaluation index and the weight factor corresponding to the energy-saving evaluation index.

[0052] In a specific embodiment, it is analyzed whether the corresponding combustion performance during the combustion of the specified fuel meets the requirements of energy-saving combustion. The specific analysis process is as follows: Compare the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process with the set threshold of the comprehensive performance evaluation coefficient. If the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process is greater than or equal to the set threshold of the comprehensive performance evaluation coefficient, it indicates that the corresponding combustion performance during the combustion of the specified fuel meets the requirements of energy-saving combustion. If the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process is less than the set threshold of the comprehensive performance evaluation coefficient, it indicates that the corresponding combustion performance during the combustion of the specified fuel does not meet the requirements of energy-saving combustion.

[0053] It should be noted that when the corresponding combustion performance during the combustion of the specified fuel does not meet the requirements of energy-saving combustion, adjust the combustion efficiency parameter information, energy-saving parameters, and improve the combustion equipment until the corresponding combustion performance during the combustion of the specified fuel meets the requirements of energy-saving combustion.

[0054] In the embodiment of the present invention, by comprehensively considering the combustion efficiency and the energy-saving index of the heat recovery process in the dynamic combustion analysis module, the comprehensive performance of the fuel is comprehensively evaluated, which helps to identify potential problems during the combustion process, formulate corresponding optimization measures, and ensure the comprehensive improvement of the performance during the fuel combustion process.

[0055] An early warning terminal is used to give an early warning prompt when the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuel and the corresponding combustion performance during the combustion of the specified fuel does not meet the requirements of energy-saving combustion.

[0056] A database is used to store the standard fuel optimization parameters corresponding to the fuel for thermal power generation. The standard fuel optimization parameters include the standard average particle size, standard volatile matter content, and standard moisture content. It also stores the standard combustion efficiency parameter information corresponding to the combustion process of the specified fuel. The standard combustion efficiency parameter information includes the standard air ratio, standard combustion temperature, and standard oxygen concentration. It also stores the number of times that the average particle size does not meet the requirement of the standard average particle size, the number of times that the volatile matter content does not meet the requirement of the standard volatile matter content, and the number of times that the moisture content does not meet the requirement of the standard moisture content when the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuel. It also stores the weight factors corresponding to the historical air ratio, historical combustion temperature, and historical oxygen concentration corresponding to the historical combustion efficiency evaluation index.

[0057] An energy-saving operation system for thermal power energy provided by the present invention can accurately evaluate the combustion characteristics of fuel by obtaining specific fuel optimization parameters. The fuel optimization parameters directly affect the combustion efficiency of the fuel and the operation stability of the system. The average particle size of the fuel affects the combustion rate, the volatile content determines the ignition property and combustion stability, and the moisture content affects the calorific value and combustion effect. Therefore, it is beneficial to select and optimize suitable fuel, improve the combustion efficiency and energy utilization rate. By analyzing the comprehensive fuel qualification index, it can be judged whether the specified fuel meets the energy-saving requirements, which is beneficial to avoid using non-standard fuel, thus reducing the problems of low combustion efficiency and energy waste caused by unqualified fuel and improving the overall energy-saving effect of thermal power generation.

[0058] The above content is only an example and illustration of the concept of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar ways to replace them. As long as they do not deviate from the concept of the invention or exceed the scope defined by this specification, they should fall within the protection scope of the present invention.

Claims

1. An energy-saving operation system for thermal power energy, characterized in that, Including: A fuel management module, configured to obtain fuel optimization parameters corresponding to a specified fuel used for thermal power generation, and then analyze whether the specified fuel used for thermal power generation meets the requirements of energy-saving fuels; A combustion efficiency analysis module, configured to collect combustion efficiency parameter information corresponding to the specified fuel during the combustion process when the specified fuel used for thermal power generation meets the requirements of energy-saving fuels, and then calculate a combustion efficiency evaluation index corresponding to the combustion process of the specified fuel; The calculation of the combustion efficiency evaluation index corresponding to the combustion process of the specified fuel is specifically as follows: Obtain the standard combustion efficiency parameter information corresponding to the combustion process of the specified fuel from the database. The standard combustion efficiency parameter information includes standard air ratio, standard combustion temperature, and standard oxygen concentration; By using the calculation formula , the combustion efficiency evaluation index corresponding to the specified fuel combustion process is obtained , where , , respectively represent the air ratio, combustion temperature, and oxygen concentration corresponding to the specified fuel combustion process, , , respectively represent the standard air ratio, standard combustion temperature, and standard oxygen concentration, , , are the weight factors corresponding to the set air ratio, the weight factor corresponding to the combustion temperature, and the weight factor corresponding to the oxygen concentration, respectively; A heat recovery process analysis module, configured to collect energy-saving parameters corresponding to the heat recovery process during the combustion of the specified fuel, and then calculate an energy-saving evaluation index corresponding to the heat recovery process; The calculation of the energy-saving evaluation index corresponding to the heat recovery process is specifically as follows: By using the calculation formula , the energy-saving evaluation index corresponding to the heat recovery process is obtained , where , , and represent the inlet flue gas temperature, the outlet flue gas temperature, the ambient temperature and the boiler shell temperature respectively, , , and represent the thermal conductivity of the thermal insulation material, the surface area of the boiler shell, the total input heat of the boiler and the thickness of the insulation layer respectively; A dynamic combustion analysis module, configured to analyze the comprehensive performance evaluation coefficient corresponding to the combustion process of the specified fuel based on the combustion efficiency evaluation index corresponding to the combustion process of the specified fuel and the energy-saving evaluation index corresponding to the heat recovery process, thereby analyzing whether the combustion performance corresponding to the combustion process of the specified fuel meets the requirements of energy-saving combustion; An early warning terminal, configured to give an early warning prompt when the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuels and the combustion performance corresponding to the combustion process of the specified fuel does not meet the requirements of energy-saving combustion.

2. The energy-saving operation system for thermal power energy according to claim 1, wherein, The obtaining of the fuel optimization parameters corresponding to the specified fuel used for thermal power generation is specifically as follows: The fuel optimization parameters include average particle size, volatile content, and moisture content. Samples are taken from the specified fuel to obtain each sample to be tested. Each sample to be tested is evenly divided into three equal parts, respectively denoted as each first sample to be tested, each second sample to be tested, and each third sample to be tested. Each first sample to be tested is placed in each standard pore sieve. According to the specified fuel particles in each first sample to be tested after screening, the particle sizes corresponding to the specified fuel particles in each first sample to be tested are statistically obtained. The average particle size corresponding to the specified fuel is obtained by calculating the mean value of the particle sizes corresponding to the specified fuel particles in each first sample to be tested; Each second sample to be tested is respectively crushed to a set particle size, and the mass of each second sample to be tested is recorded, denoted as each pre-mass. Each crushed second sample to be tested is respectively heated to a set volatile temperature value and maintained for a set duration, and then the mass corresponding to each second sample to be tested after heating is recorded, denoted as each post-mass. The difference between each pre-mass and each post-mass is calculated correspondingly, and the obtained results are calculated by taking the mean value, thereby obtaining the volatile content corresponding to the specified fuel; Crush each third sample to be detected according to the detection method of volatile matter content, record the mass of each third sample to be detected before heating, and then heat each crushed third sample to be detected to a set temperature, record the mass of each third sample to be detected after heating, perform a corresponding subtraction calculation on the masses of the corresponding third samples to be detected before and after heating, and perform an average calculation on the obtained results to obtain the moisture content of the specified fuel.

3. An energy-saving operation system for thermal power energy according to claim 2, characterized in that, Analyze whether the specified fuel used for thermal power generation meets the requirements of energy-saving fuel. The specific analysis process is as follows: According to the average particle size, volatile matter content and moisture content of the specified fuel used for thermal power generation, analyze the comprehensive fuel qualification index of the specified fuel used for thermal power generation. The comprehensive fuel qualification index includes values of 0 and 1. When the comprehensive fuel qualification index is 0, it indicates that the specified fuel used for thermal power generation does not meet the requirements of energy-saving fuel. When the comprehensive fuel qualification index is 1, it indicates that the specified fuel used for thermal power generation meets the requirements of energy-saving fuel.

4. An energy-saving operation system for thermal power energy according to claim 3, characterized in that, Analyze the comprehensive fuel qualification index of the specified fuel used for thermal power generation. The specific analysis process is as follows: Obtain the standard fuel optimization parameters corresponding to the fuel for thermal power generation from the database. The standard fuel optimization parameters include the standard average particle size, the standard volatile matter content, and the standard moisture content, which are denoted as , and ; According to the fuel qualification evaluation expression: obtain the comprehensive fuel qualification index corresponding to the specified fuel used for thermal power generation, where , , respectively represent the average particle size, volatile content, and moisture content corresponding to the specified fuel used for thermal power generation, , , are respectively the weight factors corresponding to the set average particle size, the weight factor corresponding to the volatile content, and the weight factor corresponding to the moisture content, represents the set standard comprehensive fuel qualification index interval.

5. An energy-saving operation system for thermal power energy according to claim 4, characterized in that, Collect the combustion efficiency parameter information corresponding to the combustion of the specified fuel. The specific collection process is as follows: The combustion efficiency parameter information includes air ratio, combustion temperature and oxygen concentration. During the combustion process, monitor the air volume entering the combustion chamber within a set time period through an air flow sensor, and record the total fuel supply corresponding to the set time period. Divide the air volume entering the combustion chamber within the set time period by the total fuel supply corresponding to the set time period. The obtained result is the air ratio corresponding to the combustion of the specified fuel. According to each set collection time point, monitor the temperature at the bottom of the combustion chamber corresponding to each collection time point through a temperature sensor, and perform an average calculation on the temperatures corresponding to each collection time point. The obtained result is the combustion temperature corresponding to the combustion of the specified fuel. Install an oxygen concentration sensor at the outlet of the combustion chamber to monitor the oxygen concentration corresponding to each collection time point, and perform an average calculation. The obtained result is the oxygen concentration corresponding to the combustion of the specified fuel.

6. The energy-saving operation system for thermal power energy according to claim 5, wherein, Collect the energy-saving parameters corresponding to the heat recovery process during the combustion of the specified fuel. The specific collection process is as follows: The energy-saving parameters include flue gas discharge temperature, flue gas inlet temperature and adiabatic layer thickness. According to each set time point, use a thermocouple installed in the boiler flue to monitor the flue gas discharge temperature corresponding to each time point, install a thermocouple in the boiler inlet flue to monitor the flue gas inlet temperature corresponding to each time point, and perform an average calculation on the flue gas discharge temperature corresponding to each time point and the flue gas inlet temperature corresponding to each time point. The obtained results are the flue gas discharge temperature and the flue gas inlet temperature corresponding to the heat recovery process during the combustion of the specified fuel. Obtain the adiabatic layer thickness from the boiler design specification.

7. An energy-saving operation system for thermal power energy according to claim 6, characterized in that, Analyze the comprehensive performance evaluation coefficient corresponding to the combustion of the specified fuel. The specific calculation process is as follows: Substitute the combustion efficiency evaluation index corresponding to the specified fuel combustion process and the energy-saving evaluation index corresponding to the heat recovery process into the calculation formula to obtain the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process , where , are the weight factors corresponding to the set combustion efficiency evaluation index and the weight factor corresponding to the energy-saving evaluation index, respectively.

8. An energy-saving operation system for thermal power energy according to claim 7, characterized in that, Analyze whether the combustion performance corresponding to the combustion of the specified fuel meets the requirements of energy-saving combustion. The specific analysis process is as follows: Compare the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process with the set threshold of the comprehensive performance evaluation coefficient. If the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process is greater than or equal to the set threshold of the comprehensive performance evaluation coefficient, it indicates that the combustion performance corresponding to the specified fuel during the combustion process meets the requirements of energy-saving combustion. If the comprehensive performance evaluation coefficient corresponding to the specified fuel during the combustion process is less than the set threshold of the comprehensive performance evaluation coefficient, it indicates that the combustion performance corresponding to the specified fuel during the combustion process does not meet the requirements of energy-saving combustion.

Images