Coal pulverizer mixing pulverization method, device, apparatus, and storage medium

Abstract

The application discloses a coal mill mixing pulverizing method, device, equipment and storage medium, and relates to the technical field of biomass blending combustion. The method comprises the following steps: calculating the blending ratio of biomass and coal according to the volatile matter of biomass and the volatile matter of coal; identifying the mixed calorific value under the blending ratio of biomass and coal, and identifying the mixed demand of biomass and coal required to reach the boiler load under the mixed calorific value; determining the primary air quantity of the coal mill according to the mixed demand; determining the primary air temperature of the coal mill according to the ignition temperature of biomass; and pulverizing according to the blending ratio of biomass and coal, the mixed demand, the primary air quantity and the primary air temperature. The technical scheme of the embodiment of the application can improve the efficiency and safety of the coal mill mixing pulverizing.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of biomass co-firing technology, and in particular to a method, apparatus, equipment and storage medium for mixing and pulverizing coal in a coal mill. Background Technology

[0002] With the adjustment of the global energy structure and the increasing emphasis on the use of renewable energy, the co-processing and synergistic utilization of biomass and coal has become a highly promising energy utilization strategy. Through co-processing technology, biomass and coal can be fully mixed at the microscopic level, thereby improving the combustion characteristics of the mixture, increasing combustion efficiency, and significantly reducing pollutant emissions. This strategy not only helps alleviate the pressure on coal resources but also promotes the effective utilization of biomass energy, achieving sustainable energy development.

[0003] Currently, the existing methods for mixing and pulverizing coal in coal mills mainly rely on manual methods to determine the blending ratio of biomass and coal. However, this method suffers from low efficiency and uneven mixing, leading to safety risks in the coal mill.

[0004] Therefore, there is an urgent need to propose a new method to solve the above problems. Summary of the Invention

[0005] This invention provides a method, apparatus, equipment, and storage medium for mixing and pulverizing coal in a coal mill, which can improve the efficiency and safety of mixing and pulverizing coal in a coal mill.

[0006] In a first aspect, embodiments of the present invention provide a method for mixing and pulverizing coal in a coal mill, the method comprising:

[0007] The blending ratio of biomass and coal is calculated based on the volatile matter content of biomass and coal.

[0008] Identify the mixed calorific value of biomass and coal at the blending ratio, and identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value;

[0009] The primary air volume of the coal mill is determined based on the aforementioned mixing demand.

[0010] The primary air temperature of the coal mill is determined based on the ignition temperature of the biomass.

[0011] Pulverization is carried out according to the biomass and coal blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

[0012] The technical solution of this invention calculates the blending ratio of biomass and coal based on the volatile matter content of biomass and coal; identifies the mixed calorific value under the blending ratio of biomass and coal, and identifies the required amount of biomass and coal mixture to reach the boiler load under the mixed calorific value; determines the primary air volume of the coal mill based on the mixed calorific value; determines the primary air temperature of the coal mill based on the ignition temperature of biomass; and performs pulverization based on the blending ratio of biomass and coal, the mixed calorific value, the primary air volume, and the primary air temperature. This technical solution first calculates the blending ratio of biomass and coal based on the volatile matter content of biomass and coal, achieving automatic determination of the blending ratio and improving the accuracy of the blending ratio determination, thereby improving the stability of the pulverization process and ensuring the safety of the pulverization process. Next, the mixed calorific value of biomass and coal at different blending ratios was identified, and the required blending quantity of biomass and coal to reach the boiler load at that mixed calorific value was determined. This improved the accuracy of the determined biomass and coal blending requirement, reduced the failure rate of the coal mill during operation, and thus extended the mill's lifespan. Then, the primary air volume of the coal mill was determined based on the blending requirement, providing a data basis for subsequent pulverization. Next, the primary air temperature of the coal mill was determined based on the ignition temperature of biomass, preventing deflagration or spontaneous combustion of biomass within the coal mill and ensuring safety during pulverization. Finally, pulverization was carried out based on the biomass and coal blending ratio, blending requirement, primary air volume, and primary air temperature. This improved pulverization efficiency while ensuring safety during the pulverization process, solving the safety risks of low efficiency and uneven mixing in existing technologies.

[0013] Secondly, embodiments of the present invention also provide a mixing and pulverizing apparatus for a coal mill, the apparatus comprising:

[0014] The calculation module is used to calculate the blending ratio of biomass and coal based on the volatile matter content of biomass and coal.

[0015] The identification module is used to identify the mixed calorific value of the biomass and coal at the blending ratio, and to identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value.

[0016] The air volume determination module is used to determine the primary air volume of the coal mill based on the mixing demand.

[0017] The air temperature determination module is used to determine the primary air temperature of the coal mill based on the ignition temperature of biomass.

[0018] The pulverizing module is used to pulverize biomass and coal according to the blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

[0019] Thirdly, embodiments of the present invention also provide an electronic device, the electronic device comprising:

[0020] At least one processor; and a memory communicatively connected to said at least one processor;

[0021] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to implement the mixing and pulverizing method of the coal mill as described in any of the first aspects.

[0022] Fourthly, embodiments of the present invention also provide a storage medium containing computer-executable instructions.

[0023] The computer-executable instructions, when executed by a computer processor, implement the mixing and pulverizing method of any of the coal mills described in the first aspect.

[0024] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the processor of the coal mill's mixing and pulverizing unit, or it may be packaged separately from the processor of the coal mill's mixing and pulverizing unit; this application does not impose any limitations on this.

[0025] The descriptions of the second, third, and fourth aspects in this application can be referenced to the detailed description of the first aspect; and the beneficial effects described in the second, third, and fourth aspects can be referenced to the analysis of the beneficial effects of the first aspect, which will not be repeated here.

[0026] In this application, the name of the mixing and pulverizing device of the aforementioned coal mill does not limit the equipment or functional module itself. In actual implementation, these devices or functional modules may appear under other names. As long as the function of each device or functional module is similar to that of this application, it falls within the scope of the claims of this application and its equivalents.

[0027] These or other aspects of this application will become more readily apparent in the following description. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A flowchart of a coal mill mixing and pulverizing method provided in an embodiment of the present invention;

[0030] Figure 2A flowchart of another coal mill mixing and pulverizing method provided in an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of a coal mill mixing and pulverizing device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0034] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0035] The terms "first" and "second," etc., used in the specification and drawings of this application are used to distinguish different objects or to distinguish different treatments of the same object, rather than to describe a specific order of objects.

[0036] Furthermore, the terms "comprising" and "having," and any variations thereof, used in the description of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include other steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0037] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subroutine, etc. Moreover, embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0038] It should be noted that in the embodiments of this application, the words "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0039] In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0040] Figure 1 This is a flowchart illustrating a coal mill mixing and pulverizing method according to an embodiment of the present invention. This embodiment is applicable to situations requiring the mixing and pulverizing of coal and biomass using a coal mill. The method can be executed by a coal mill mixing and pulverizing device, which can be implemented using hardware / software. This device can be integrated into an electronic device, such as being installed in a computer; this embodiment of the present invention does not impose any limitations on this. Figure 1 As shown, the specific steps include the following:

[0041] Step 110: Calculate the blending ratio of biomass and coal based on the volatile matter content of biomass and coal.

[0042] Specifically, biomass refers to all kinds of organic matter formed through photosynthesis, including all plants, animals, and microorganisms. For example, biomass can be rice husks, straw, or corn stalks. The volatile matter of biomass refers to all the gaseous products released when biomass is heated in the absence of air under specified conditions (e.g., 900 degrees Celsius). The volatile matter of coal refers to the liquid (vapor state) and gaseous products minus the moisture content after coal is heated in the absence of air under specified conditions (e.g., 900 degrees Celsius). The biomass-coal blending ratio refers to the mass ratio between biomass and coal during pulverization. For example, a biomass-coal blending ratio of 3:2 means the mass ratio of biomass to coal is 3:2.

[0043] In practice, the required types of coal mill, biomass, and coal can be determined first based on actual needs or circumstances. Then, based on the type of biomass, the volatile matter content of the biomass is determined from the correspondence table between biomass and volatile matter; based on the type of coal, the volatile matter content of the coal is determined from the correspondence table between coal and volatile matter; and based on the type of coal mill, the maximum volatile matter content of the coal mill is determined from the correspondence table between coal mill and volatile matter. Afterward, the blending ratio of biomass and coal can be calculated based on the maximum volatile matter content of the coal mill, the volatile matter content of biomass, and the volatile matter content of coal. Specifically, the volatile matter content of biomass can be used as the first independent variable in the blending ratio calculation formula, the volatile matter content of coal as the second independent variable, and the maximum volatile matter content of the coal mill as the dependent variable. The blending ratio calculation formula is solved based on the first, second, and dependent variables to obtain the biomass blending ratio and the coal blending ratio, and the sum of the biomass blending ratio and the coal blending ratio is one. Finally, the ratio of biomass blending to coal blending is calculated to obtain the biomass and coal blending ratio.

[0044] It should be noted that the correspondence tables between biomass and volatile matter, coal and volatile matter, and coal mill and volatile matter were all obtained in advance based on experiments.

[0045] In this embodiment, the blending ratio of biomass and coal is calculated based on the volatile matter of biomass and coal, which enables automatic determination of the blending ratio and improves the accuracy of the blending ratio determination, thereby improving the stability of the grinding process and ensuring the safety of the grinding process.

[0046] Step 120: Identify the mixed calorific value of biomass and coal at the blending ratio, and identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value.

[0047] Specifically, the blended calorific value refers to the heat released per unit mass or unit volume of fuel obtained by mixing biomass and coal according to the blending ratio. Boiler load refers to the amount of heat supplied or evaporated per unit time during boiler operation. Blended demand refers to the total mass of blended fuel (such as a mixture of biomass and coal) required to achieve a specific boiler load.

[0048] In practice, the calorific value of biomass can be determined first based on the type of biomass using a table corresponding to its calorific value, and the calorific value of coal can be determined based on the type of coal using a table corresponding to its calorific value. Then, the mixed calorific value at the desired biomass-coal blending ratio can be determined based on the calorific values ​​of biomass and coal. Specifically, the mixed calorific value at the desired biomass-coal blending ratio = calorific value of biomass × biomass blending ratio + calorific value of coal × coal blending ratio. Afterward, the ratio of boiler load to the mixed calorific value can be calculated to obtain the required amount of biomass and coal to be blended.

[0049] In addition, if the coal mill is equipped with a distributed control system (DCS), after obtaining the mixed calorific value, the mixed calorific value and boiler load can be used as input parameters, and the DCS system algorithm can automatically calculate and output the mixed demand of biomass and coal.

[0050] It should be noted that the tables showing the correspondence between biomass and calorific value, as well as between coal and calorific value, were obtained in advance based on experiments.

[0051] In this embodiment, the above steps can improve the accuracy of the determined mixed demand of biomass and coal, reduce the failure rate of the coal mill during operation, and thus extend the life of the coal mill.

[0052] Step 130: Determine the primary air volume of the coal mill based on the mixing demand.

[0053] Specifically, in this embodiment, a coal mill refers to a device that grinds a mixture of biomass and coal into fine powder. Primary air volume refers to the volume of air fed into the coal mill, carrying the ground powder (the powder from the biomass and coal mixture), into the boiler burner.

[0054] In practice, the type of biomass-coal mixture can be determined based on the type of biomass and the type of coal. A corresponding table showing the blending ratio and air-coal ratio for this mixture can then be established. The air-coal ratio of the mixture can then be determined based on the blending ratio of biomass and coal within this table. Finally, the product of the required amount of mixture and the air-coal ratio is calculated to obtain the primary air volume of the coal mill.

[0055] It should be noted that the corresponding relationship table of the blending ratio and air-coal ratio for each mixture was determined in advance based on experiments.

[0056] In addition, if the coal mill is equipped with a DCS system, the mixing demand can be used as an input parameter, and the DCS system can automatically calculate and output the primary air volume of the coal mill.

[0057] In this embodiment, the primary air volume of the coal mill is determined based on the mixing demand, providing a data basis for subsequent pulverization.

[0058] Step 140: Determine the primary air temperature of the coal mill based on the ignition temperature of the biomass.

[0059] Specifically, the ignition temperature of biomass refers to the minimum temperature at which biomass begins to burn sustainably. The primary air temperature of a coal mill refers to the temperature of the air fed into the coal mill, carrying the ground powder, into the boiler burner.

[0060] In practice, the primary air temperature of the coal mill is equal to the ignition temperature of biomass minus the preset temperature. The preset temperature refers to the temperature determined according to actual conditions or needs to prevent biomass from burning during pulverization. For example, the preset temperature is greater than or equal to zero.

[0061] In this embodiment, the primary air temperature of the coal mill is determined based on the ignition temperature of biomass, which can prevent deflagration or spontaneous combustion of biomass in the coal mill and ensure safety during the pulverization process.

[0062] Step 150: Pulverize the biomass and coal according to the blending ratio, mixing requirements, primary air volume and primary air temperature.

[0063] Specifically, pulverization refers to the process of using a coal mill to grind lumpy or granular biomass and coal according to specific requirements (such as the blending ratio of biomass and coal, the required amount of mixture, the primary air volume and the primary air temperature) to transform them into fine powdery materials that meet the requirements for subsequent combustion or utilization.

[0064] In practice, after determining the blending ratio of biomass and coal, the required mixing volume, the primary air volume, and the primary air temperature, biomass and coal are fed into the coal mill according to the aforementioned blending ratio. The mill's baffles are controlled to stabilize the primary air temperature at the aforementioned predetermined level, and the mill's fan is adjusted, along with the damper opening, to stabilize the primary air volume at the aforementioned predetermined level. The coal mill is then started to pulverize the biomass and coal according to the aforementioned requirements, yielding a biomass and coal mixture powder.

[0065] In this embodiment, pulverization is carried out according to the blending ratio of biomass and coal, the required amount of mixture, the primary air volume and the primary air temperature, which not only improves the pulverization efficiency but also ensures the safety of the pulverization process.

[0066] In this embodiment of the invention, the blending ratio of biomass and coal is first calculated based on the volatile matter content of biomass and coal, achieving automatic determination of the blending ratio and improving the accuracy of the determination, thereby enhancing the stability of the pulverizing process and ensuring its safety. Next, the mixed calorific value under the biomass and coal blending ratio is identified, and the required amount of biomass and coal mixture to reach the boiler load at that mixed calorific value is determined, improving the accuracy of the determined biomass and coal mixture requirement, reducing the failure rate of the coal mill during operation, and thus extending the lifespan of the coal mill. Then, the primary air volume of the coal mill is determined based on the mixture requirement, providing a data basis for subsequent pulverizing. Finally, the primary air temperature of the coal mill is determined based on the ignition temperature of biomass, preventing deflagration or spontaneous combustion of biomass in the coal mill and ensuring the safety of the pulverizing process. Finally, pulverization is carried out based on the blending ratio of biomass and coal, the required amount of mixing, the primary air volume and the primary air temperature. This improves pulverization efficiency while ensuring safety during the pulverization process, and solves the problems of low efficiency and uneven mixing in existing technologies that lead to safety risks in coal mills.

[0067] Figure 2 This is a flowchart illustrating another method for mixing and pulverizing coal using a coal mill, provided as an embodiment of the present invention. This embodiment is a specific refinement based on the above embodiments. In this embodiment, the method may further include:

[0068] Step 210: Take the volatile matter of biomass as the first independent variable in the blending ratio calculation formula, take the volatile matter of coal as the second independent variable in the blending ratio calculation formula, and take the maximum volatile matter of the coal mill as the dependent variable in the blending ratio calculation formula.

[0069] Specifically, the first independent variable in the blending ratio calculation formula is the volatile matter of biomass, the second independent variable is the volatile matter of coal, and the dependent variable is the maximum volatile matter content of the coal mill. The blending ratio calculation formula is a mathematical formula used to determine the respective proportions of biomass and coal in the blending and pulverizing process. The maximum volatile matter content of the coal mill refers to the maximum value of fuel volatile matter that the coal mill can withstand during operation.

[0070] In practice, the required types of coal mills, biomass, and coal can be determined first based on actual needs or circumstances. Then, based on the type of biomass, the volatile matter content of the biomass can be determined from the correspondence table between biomass and volatile matter. Based on the type of coal, the volatile matter content of the coal can be determined from the correspondence table between coal and volatile matter. Based on the type of coal mill, the maximum volatile matter content of the coal mill can be determined from the correspondence table between coal mill and volatile matter. After that, the volatile matter content of the biomass is used as the first independent variable in the formula for calculating the blending ratio, the volatile matter content of the coal is used as the second independent variable in the formula for calculating the blending ratio, and the maximum volatile matter content of the coal mill is used as the dependent variable in the formula for calculating the blending ratio.

[0071] It should be noted that the correspondence tables between biomass and volatile matter, coal and volatile matter, and coal mill and volatile matter were all obtained in advance based on experiments or by consulting existing technical literature.

[0072] Step 211: Solve the blending ratio calculation formula based on the first independent variable, the second independent variable, and the dependent variable of the blending ratio calculation formula to obtain the biomass blending ratio and the coal blending ratio.

[0073] Specifically, the sum of the biomass blending ratio and the coal blending ratio is one. The biomass blending ratio refers to the proportion of biomass in the mixture of biomass and coal. The coal blending ratio refers to the proportion of coal in the mixture of biomass and coal.

[0074] In practice, after obtaining the first independent variable, the second independent variable, the dependent variable, and the constraints on the biomass and coal blending ratios (such as the sum of the biomass and coal blending ratios being one) of the blending ratio calculation formula, these data can be substituted into the blending ratio calculation formula to obtain the biomass and coal blending ratios. The blending ratio calculation formula can be: a×x1+b×x2=x, where a+b=1, x represents the maximum volatile matter of the coal mill, i.e., the dependent variable of the blending ratio calculation formula, x1 represents the volatile matter of biomass, i.e., the first independent variable of the blending ratio calculation formula, x2 represents the volatile matter of coal, i.e., the second independent variable of the blending ratio calculation formula, a represents the biomass blending ratio, and b represents the coal blending ratio.

[0075] In this embodiment, the above steps improve the accuracy and rationality of the determined biomass and coal blending ratios, thereby improving the accuracy of the subsequently determined biomass and coal blending ratios and thus enhancing the stability and safety of the grinding process.

[0076] Step 212: Calculate the biomass and coal blending ratio based on the biomass blending ratio and the coal blending ratio.

[0077] For example, if the biomass blending ratio is 60% and the coal blending ratio is 40%, then the biomass to coal blending ratio is 3:2.

[0078] Step 213: Take the calorific value of biomass as the first independent variable in the formula for calculating the mixed calorific value, take the biomass blending ratio as the first independent variable coefficient in the formula for calculating the mixed calorific value, take the calorific value of coal as the second independent variable in the formula for calculating the mixed calorific value, and take the coal blending ratio as the second independent variable coefficient in the formula for calculating the mixed calorific value.

[0079] Specifically, the mixed calorific value calculation formula refers to a formula used to calculate the heat released by the complete combustion of a unit mass (or volume) of a mixture obtained by blending biomass and coal at a certain blending ratio. The first independent variable in the mixed calorific value calculation formula is the calorific value of the biomass. The calorific value of biomass refers to the heat released when a unit mass (or unit volume) of biomass is completely burned. The coefficient of the first independent variable in the mixed calorific value calculation formula is the coefficient multiplied by the first independent variable in the mixed calorific value calculation formula. In this embodiment, the coefficient of the first independent variable in the mixed calorific value calculation formula is the blending ratio of biomass. The second independent variable in the mixed calorific value calculation formula is the calorific value of the coal. The calorific value of coal refers to the heat released when a unit mass (or unit volume) of coal is completely burned. The coefficient of the second independent variable in the mixed calorific value calculation formula is the coefficient multiplied by the second independent variable in the mixed calorific value calculation formula. In this embodiment, the coefficient of the second independent variable in the mixed calorific value calculation formula is the blending ratio of coal.

[0080] In practice, after obtaining the biomass blending ratio and the coal blending ratio, the calorific value of the biomass can be determined based on the biomass type in a table corresponding to the calorific value of biomass, and the calorific value of the coal can be determined based on the coal type in a table corresponding to the calorific value of coal. Then, the calorific value of the biomass can be used as the first independent variable in the formula for calculating the mixed calorific value, the biomass blending ratio as the first independent variable coefficient, and the calorific value of the coal as the second independent variable coefficient.

[0081] It should be noted that the correspondence tables between biomass and calorific value, as well as between coal and calorific value, were obtained in advance based on experiments or by consulting existing technical literature.

[0082] Step 214: Solve the mixed calorific value calculation formula based on the first independent variable, the coefficient of the first independent variable, the second independent variable, and the coefficient of the second independent variable to obtain the mixed calorific value.

[0083] In practice, after obtaining the first independent variable, the coefficient of the first independent variable, the second independent variable, and the coefficient of the second independent variable in the formula for calculating the mixed calorific value, these data can be substituted into the formula to obtain the mixed calorific value. The formula for calculating the mixed calorific value can be: a×y1+b×y2=y, where y represents the mixed calorific value, y1 represents the calorific value of biomass (i.e., the first independent variable), y2 represents the calorific value of coal (i.e., the second independent variable), a represents the proportion of biomass to be burned (i.e., the coefficient of the first independent variable), and b represents the proportion of coal to be burned (i.e., the coefficient of the second independent variable).

[0084] In this embodiment, the accuracy of the determined mixed calorific value is improved through the above steps.

[0085] Step 215: Calculate the ratio of boiler load to mixed calorific value to obtain the mixed demand.

[0086] In practical applications, the mixed demand can be determined as: boiler load / mixed calorific value.

[0087] In this embodiment, the above steps improve the efficiency and accuracy of determining the mixed demand.

[0088] Step 216: Determine the type of biomass and coal mixture based on the type of biomass and the type of coal, and determine the corresponding relationship table of blending ratio and air-coal ratio based on the type of mixture.

[0089] Specifically, the type of biomass includes biomass species information or biomass species information and origin information, and this embodiment of the invention does not impose any limitations on this. The type of coal includes coal species information or coal species information and origin information, and this embodiment of the invention does not impose any limitations on this. A mixture of biomass and coal refers to a fuel made by mixing biomass and coal in a certain proportion.

[0090] For example, if the biomass type is rice husk and the coal type is bituminous coal, and the corresponding tables of blending ratio and air-coal ratio for each mixture include Table A for the blending ratio of rice husk and bituminous coal and Table B for the blending ratio of corn stalk and bituminous coal and Table A for the blending ratio of corn stalk and bituminous coal, then the type of mixture is rice husk and bituminous coal, and the corresponding table of blending ratio and air-coal ratio for this mixture is Table A.

[0091] For example, if the biomass type is rice husk from origin 1 and the coal type is bituminous coal from origin 2, the corresponding relationship table of the blending ratio and air-coal ratio for each mixture includes Table C of the blending ratio and air-coal ratio of rice husk from origin 1 to bituminous coal from origin 2, and Table D of the blending ratio and air-coal ratio of rice husk from origin 1 to bituminous coal from origin 1. Then, if the type of mixture is rice husk from origin 1 and bituminous coal from origin 2, the corresponding relationship table of the blending ratio and air-coal ratio for this mixture is Table C.

[0092] It should be noted that the corresponding tables of blending ratios and air-coal ratios for each mixture were obtained in advance based on experiments.

[0093] In this embodiment, the type of biomass and coal mixture is determined according to the type of biomass and the type of coal, and a corresponding relationship table of blending ratio and air-coal ratio is determined according to the type of mixture, providing a data basis for determining the air-coal ratio of the mixture later.

[0094] Step 217: Determine the air-coal ratio of the mixture based on the blending ratio of biomass and coal in the corresponding table of blending ratio and air-coal ratio of the mixture.

[0095] Specifically, the air-coal ratio refers to the ratio of primary air volume to the required amount of a mixture of biomass and coal.

[0096] In practice, after determining the correspondence table between the blending ratio and the air-coal ratio of the mixture, the air-coal ratio of the mixture can be obtained by querying the table based on the blending ratio of biomass and coal.

[0097] In this embodiment, the accuracy of the determined air-coal ratio is improved by the above method.

[0098] Step 218: Calculate the product of the mixed demand and the air-coal ratio of the mixture to obtain the primary air volume.

[0099] In practical applications, the primary air volume can be determined as: primary air volume = mixing demand × air-coal ratio of the mixture.

[0100] In this embodiment, obtaining the primary air volume provides a data basis for subsequent powder production.

[0101] Step 219: Determine the primary air temperature of the coal mill based on the ignition temperature of the biomass.

[0102] Specifically, the primary air temperature of the coal mill should not exceed the ignition temperature of biomass. For example, if the ignition temperature of biomass is 400℃, then the primary air temperature of the coal mill should be 350℃.

[0103] Step 220: Pulverize the biomass and coal according to the blending ratio, mixing requirements, primary air volume and primary air temperature.

[0104] Therefore, the technical solution of this invention first uses the volatile matter of biomass as the first independent variable in the blending ratio calculation formula, the volatile matter of coal as the second independent variable, and the maximum volatile matter of the coal mill as the dependent variable. Then, based on the first, second, and dependent variables of the blending ratio calculation formula, the blending ratio calculation formula is solved to obtain the biomass blending ratio and the coal blending ratio. This improves the accuracy and rationality of the determined biomass and coal blending ratios, thereby improving the accuracy of the subsequently determined biomass and coal blending ratios, and thus improving the stability and safety of the grinding process. Finally, based on the biomass and coal blending ratios, the biomass and coal blending ratio is calculated. Then, the calorific value of biomass is used as the first independent variable in the formula for calculating the mixed calorific value, and the biomass blending ratio is used as the first independent variable coefficient. The calorific value of coal is used as the second independent variable, and the coal blending ratio is used as the second independent variable coefficient. Based on the first independent variable, the first independent variable coefficient, the second independent variable, and the second independent variable coefficient, the formula for calculating the mixed calorific value is solved to obtain the mixed calorific value, thus improving the accuracy of the determined mixed calorific value. Next, the ratio of boiler load to the mixed calorific value is calculated to obtain the mixed demand, improving the efficiency and accuracy of determining the mixed demand. Then, the type of biomass-coal mixture is determined according to the type of biomass and the type of coal, and a corresponding table of blending ratios and air-coal ratios is determined based on the type of mixture, providing a data foundation for determining the air-coal ratio of the mixture. Finally, the air-coal ratio of the mixture is determined based on the corresponding table of blending ratios and air-coal ratios of the mixture, improving the accuracy of the determined air-coal ratio. The primary air volume is then calculated by multiplying the required amount of biomass by the air-to-coal ratio, providing a data foundation for subsequent pulverization. The primary air temperature of the coal mill is then determined based on the ignition temperature of biomass, preventing deflagration or spontaneous combustion of biomass within the mill and ensuring safety during pulverization. Finally, pulverization is performed based on the biomass-coal blending ratio, required amount of biomass, primary air volume, and primary air temperature. This approach improves pulverization efficiency while ensuring safety during the process, resolving the safety risks associated with low efficiency and uneven mixing in existing technologies.

[0105] Figure 3 This is a schematic diagram of the structure of a coal mill mixing and pulverizing device provided in an embodiment of the present invention. This device belongs to the same inventive concept as the coal mill mixing and pulverizing method in the above embodiments. For details not described in detail in the embodiments of the coal mill mixing and pulverizing device, please refer to the embodiments of the coal mill mixing and pulverizing method.

[0106] like Figure 3 As shown, the device includes:

[0107] The calculation module 310 is used to calculate the blending ratio of biomass and coal based on the volatile matter of biomass and coal.

[0108] The identification module 320 is used to identify the mixed calorific value of the biomass and coal at the blending ratio, and to identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value.

[0109] Air volume determination module 330 is used to determine the primary air volume of the coal mill based on the mixing demand.

[0110] The air temperature determination module 340 is used to determine the primary air temperature of the coal mill based on the ignition temperature of biomass.

[0111] The pulverizing module 350 is used to pulverize biomass and coal according to the blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

[0112] Based on the above embodiments, the calculation module 310 is specifically used for:

[0113] The volatile matter of the biomass is used as the first independent variable in the formula for calculating the blending ratio, the volatile matter of the coal is used as the second independent variable in the formula for calculating the blending ratio, and the maximum volatile matter of the coal mill is used as the dependent variable in the formula for calculating the blending ratio.

[0114] Based on the first independent variable, the second independent variable, and the dependent variable of the blending ratio calculation formula, the blending ratio calculation formula is solved to obtain the biomass blending ratio and the coal blending ratio, and the sum of the biomass blending ratio and the coal blending ratio is one.

[0115] The biomass and coal blending ratio is calculated based on the biomass blending ratio and the coal blending ratio.

[0116] Based on the above embodiments, the identification module 320 identifies the mixed calorific value of the biomass and coal at the blending ratio, including:

[0117] The calorific value of biomass is used as the first independent variable in the formula for calculating the mixed calorific value, the blending ratio of biomass is used as the first independent variable coefficient in the formula for calculating the mixed calorific value, the calorific value of coal is used as the second independent variable in the formula for calculating the mixed calorific value, and the blending ratio of coal is used as the second independent variable coefficient in the formula for calculating the mixed calorific value.

[0118] The mixed calorific value is obtained by solving the mixed calorific value calculation formula based on the first independent variable, the coefficient of the first independent variable, the second independent variable, and the coefficient of the second independent variable.

[0119] Based on the above embodiments, the identification module 320 identifies the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value, including:

[0120] The ratio of the boiler load to the mixed calorific value is calculated to obtain the mixed demand.

[0121] Based on the above embodiments, the air volume determination module 330 is specifically used for:

[0122] The air-coal ratio of the biomass and coal mixture is determined based on the blending ratio of biomass and coal.

[0123] The primary air volume is obtained by multiplying the mixed demand and the air-coal ratio.

[0124] Based on the above embodiments, the air volume determination module 330 determines the air-coal ratio of the biomass and coal mixture according to the biomass and coal blending ratio, including:

[0125] The type of the mixture is determined based on the type of biomass and the type of coal, and a corresponding table of the blending ratio and air-coal ratio is determined based on the type of the mixture.

[0126] The air-coal ratio is determined based on the blending ratio of biomass and coal in the table corresponding to the blending ratio and air-coal ratio of the mixture.

[0127] Based on the above embodiments, the primary air temperature of the coal mill is not greater than the ignition temperature of the biomass.

[0128] The coal mill mixing and pulverizing device provided in the embodiments of the present invention can execute the coal mill mixing and pulverizing method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0129] It is worth noting that in the embodiments of the above-mentioned coal mill mixing and pulverizing device, the various units and modules included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be achieved; in addition, the specific names of each functional unit are only for easy differentiation and are not used to limit the scope of protection of the present invention.

[0130] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Figure 4A block diagram of an exemplary electronic device 4 suitable for implementing embodiments of the present invention is shown. Figure 4 The electronic device 4 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of the present invention.

[0131] like Figure 4 As shown, electronic device 4 is represented in the form of a general-purpose computing electronic device. The components of electronic device 4 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0132] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0133] Electronic device 4 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by electronic device 4, including volatile and non-volatile media, removable and non-removable media.

[0134] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Electronic device 4 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (… Figure 4 Not shown; usually referred to as a "hard drive"). Although Figure 4 Not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. System memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of the present invention.

[0135] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in system memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of the present invention.

[0136] Electronic device 4 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with electronic device 4, and / or with any device that enables electronic device 4 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed through input / output (I / O) interface 22. Furthermore, electronic device 4 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) through network adapter 20. Figure 4 As shown, network adapter 20 communicates with other modules of electronic device 4 via bus 18. It should be understood that, although... Figure 4 Not shown, it can be combined with electronic device 4 to use other hardware and / or software modules, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0137] Processing unit 16 executes various functional applications and page displays by running programs stored in system memory 28, such as implementing the coal mill mixing and pulverizing method provided in this embodiment of the invention, which includes:

[0138] The blending ratio of biomass and coal is calculated based on the volatile matter content of biomass and coal.

[0139] Identify the mixed calorific value of biomass and coal at the blending ratio, and identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value;

[0140] The primary air volume of the coal mill is determined based on the aforementioned mixing demand.

[0141] The primary air temperature of the coal mill is determined based on the ignition temperature of the biomass.

[0142] Pulverization is carried out according to the biomass and coal blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

[0143] Of course, those skilled in the art will understand that the processor can also implement the technical solution of the coal mill mixing and pulverizing method provided in any embodiment of the present invention.

[0144] This invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements, for example, the coal mill mixing and pulverizing method provided in this invention, the method comprising:

[0145] The blending ratio of biomass and coal is calculated based on the volatile matter content of biomass and coal.

[0146] Identify the mixed calorific value of biomass and coal at the blending ratio, and identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value;

[0147] The primary air volume of the coal mill is determined based on the aforementioned mixing demand.

[0148] The primary air temperature of the coal mill is determined based on the ignition temperature of the biomass.

[0149] Pulverization is carried out according to the biomass and coal blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

[0150] The computer storage medium of this invention can be any combination of one or more computer-readable media. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0151] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0152] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0153] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages—such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0154] Those skilled in the art will understand that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby allowing them to be stored in a storage device for execution by a computing device, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0155] Furthermore, the acquisition, storage, use, and processing of data in the technical solution of this invention all comply with the relevant provisions of national laws and regulations.

[0156] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for mixing and pulverizing coal in a coal mill, characterized in that, The method includes: The blending ratio of biomass and coal is calculated based on the volatile matter content of biomass and coal. Identify the mixed calorific value of biomass and coal at the blending ratio, and identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value; The primary air volume of the coal mill is determined based on the aforementioned mixing demand. The primary air temperature of the coal mill is determined based on the ignition temperature of the biomass; the primary air temperature of the coal mill is not greater than the ignition temperature of the biomass. Pulverization is carried out according to the biomass and coal blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature; Calculating the biomass-coal blending ratio based on the volatile matter of biomass and coal includes: using the volatile matter of biomass as the first independent variable in the blending ratio calculation formula, using the volatile matter of coal as the second independent variable in the blending ratio calculation formula, and using the maximum volatile matter of the coal mill as the dependent variable in the blending ratio calculation formula; solving the blending ratio calculation formula based on the first independent variable, the second independent variable, and the dependent variable to obtain the biomass blending ratio and the coal blending ratio, wherein the sum of the biomass blending ratio and the coal blending ratio is one; and calculating the biomass-coal blending ratio based on the biomass blending ratio and the coal blending ratio. Identifying the mixed calorific value under the blending ratio of biomass and coal includes: using the calorific value of biomass as the first independent variable in the mixed calorific value calculation formula, using the blending ratio of biomass as the first independent variable coefficient in the mixed calorific value calculation formula, using the calorific value of coal as the second independent variable in the mixed calorific value calculation formula, and using the blending ratio of coal as the second independent variable coefficient in the mixed calorific value calculation formula; solving the mixed calorific value calculation formula based on the first independent variable, the first independent variable coefficient, the second independent variable, and the second independent variable coefficient to obtain the mixed calorific value.

2. The coal mill mixing and pulverizing method according to claim 1, characterized in that, Identifying the required amount of biomass and coal mixture needed to reach boiler load at the stated mixed calorific value includes: The ratio of the boiler load to the mixed calorific value is calculated to obtain the mixed demand.

3. The coal mill mixing and pulverizing method according to claim 1, characterized in that, The primary air volume of the coal mill is determined based on the aforementioned mixed demand, including: The air-coal ratio of the biomass and coal mixture is determined based on the blending ratio of biomass and coal. The primary air volume is obtained by multiplying the mixed demand and the air-coal ratio.

4. The coal mill mixing and pulverizing method according to claim 3, characterized in that, The air-coal ratio of the biomass and coal mixture is determined based on the aforementioned blending ratio, including: The type of the mixture is determined based on the type of biomass and the type of coal, and a corresponding table of the blending ratio and air-coal ratio is determined based on the type of the mixture. The air-coal ratio is determined based on the blending ratio of biomass and coal in the table corresponding to the blending ratio and air-coal ratio of the mixture.

5. A coal mill mixing and pulverizing apparatus, employing the coal mill mixing and pulverizing method as described in any one of claims 1 to 4, characterized in that, The device includes: The calculation module is used to calculate the blending ratio of biomass and coal based on the volatile matter content of biomass and coal. The identification module is used to identify the mixed calorific value of the biomass and coal at the blending ratio, and to identify the required amount of biomass and coal mixture to reach the boiler load at the mixed calorific value. The air volume determination module is used to determine the primary air volume of the coal mill based on the mixing demand. The air temperature determination module is used to determine the primary air temperature of the coal mill based on the ignition temperature of the biomass; the primary air temperature of the coal mill is not greater than the ignition temperature of the biomass. The pulverizing module is used to pulverize biomass and coal according to the blending ratio, the required amount of mixture, the primary air volume, and the primary air temperature.

6. An electronic device, characterized in that, The electronic device includes: At least one processor; and a memory communicatively connected to said at least one processor; The memory stores a computer program that can be executed by the at least one processor, which is then executed by the at least one processor to enable the at least one processor to perform the coal mill mixing and pulverizing method according to any one of claims 1-4.

7. A storage medium containing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, implement the mixing and pulverizing method of any one of the coal mills described in claims 1-4.

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