Mixing pulverizing method, device and equipment of coal mill and storage medium

Abstract

The invention discloses a mixed pulverizing method, device and equipment of a coal mill and a storage medium, and relates to the technical field of biomass blending combustion. The method comprises the following steps: calculating a blending combustion ratio of biomass and coal according to volatile components of the biomass and volatile components of the coal; identifying the mixing heat value under the blending combustion ratio of the biomass and the coal, and identifying the mixing demand quantity of the biomass and the coal required for reaching the boiler load under the mixing heat value; determining the primary air volume of the coal mill according to the mixing demand quantity; the primary air temperature of the coal mill is determined according to the ignition temperature of the biomass; and pulverizing according to the blending combustion ratio, the mixing demand, the primary air volume and the primary air temperature of the biomass and the coal. According to the technical scheme of the embodiment of the invention, the efficiency and safety of mixing and pulverizing of the coal mill can be improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of biomass blending, and in particular to a coal mill mixing pulverizing method, device, equipment and storage medium. Background Art

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

[0003] At present, the existing coal mill mixing and pulverizing method mainly determines the mixing ratio of biomass and coal by manual means. However, this method has the problems of low efficiency and uneven mixing, which leads to safety risks of coal mill.

[0004] Therefore, it is urgent to propose a new method to solve the above problems. Summary of the invention

[0005] The invention provides a coal mill mixed pulverizing method, device, equipment and storage medium, which can improve the efficiency and safety of the coal mill mixed pulverizing.

[0006] In a first aspect, an embodiment of the present invention provides a mixed pulverizing method of a coal mill, the method comprising:

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

[0008] Identifying the mixed calorific value of the biomass and coal at the blending ratio, and identifying the required amount of biomass and coal to achieve the boiler load at the mixed calorific value;

[0009] Determining the primary air volume of the coal mill according to the mixing demand;

[0010] Determining the primary air temperature of the coal mill according to the ignition temperature of the biomass;

[0011] Pulverizing is performed according to the blending ratio of the biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

[0012] The technical solution of the present invention calculates the blending ratio of biomass and coal based on the volatile matter of biomass and the volatile matter of coal; identifies the mixed calorific value under the blending ratio of biomass and coal, and identifies the mixed demand of biomass and coal required to reach the boiler load under the mixed calorific value; determines the primary air volume of the pulverizer according to the mixed demand; determines the primary air temperature of the pulverizer according to the ignition temperature of the biomass; and performs pulverization according to the blending ratio of biomass and coal, the mixed demand, the primary air volume and the primary air temperature. The above technical solution first calculates the blending ratio of biomass and coal based on the volatile matter of biomass and the volatile matter of coal, realizes the automatic determination of the blending ratio of biomass and coal, and improves the accuracy of the determination of the blending ratio, thereby improving the stability in the pulverization process, and further ensuring the safety in the pulverization process. After that, the mixed calorific value of the biomass and coal blending ratio is identified, and the mixed demand of biomass and coal required to achieve the boiler load under the mixed calorific value is identified, which improves the accuracy of the determined mixed demand of biomass and coal, reduces the failure rate of the coal mill during operation, and thus prolongs the life of the coal mill. Then, the primary air volume of the coal mill is determined according to the mixed demand, which provides a data basis for subsequent pulverizing. The primary air temperature of the coal mill is determined according to the ignition temperature of the biomass, which avoids the explosion or spontaneous combustion of biomass in the coal mill and ensures the safety of the pulverizing process. Finally, pulverizing is carried out according to the blending ratio of biomass and coal, the mixed demand, the primary air volume and the primary air temperature, which improves the pulverizing efficiency while ensuring the safety of the pulverizing process, and solves the problem of safety risks of the coal mill caused by low efficiency and uneven mixing in the existing technology.

[0013] In a second aspect, an embodiment of the present invention further provides a mixing and pulverizing device for a coal mill, the device comprising:

[0014] A calculation module, used for calculating the blending ratio of biomass and coal according to the volatile matter of biomass and the volatile matter of coal;

[0015] An identification module, used to identify the mixed calorific value of the biomass and coal at the blending ratio, and to identify the required amount of the biomass and coal to achieve the boiler load at the mixed calorific value;

[0016] An air volume determination module, used for determining the primary air volume of the coal mill according to the mixing demand;

[0017] An air temperature determination module, used to determine the primary air temperature of the coal mill according to the ignition temperature of the biomass;

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

[0019] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0020] at least one processor; and a memory communicatively coupled to the at least one processor;

[0021] Wherein, the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can implement the mixed pulverizing method of the coal mill described in any one of the first aspects.

[0022] In a fourth aspect, an embodiment of the present invention further provides a storage medium including computer executable instructions,

[0023] The computer executable instructions, when executed by a computer processor, implement the mixed pulverizing method for a coal mill as described in any one of the first aspects.

[0024] It should be noted that the above-mentioned computer instructions can be stored in whole or in part on a computer-readable storage medium. The computer-readable storage medium can be packaged together with the processor of the mixing and pulverizing device of the coal mill, or it can be packaged separately from the processor of the mixing and pulverizing device of the coal mill, and this application does not limit this.

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

[0026] In this application, the name of the above-mentioned coal mill mixing and pulverizing device does not limit the device or functional module itself. In actual implementation, these devices or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of this application, they fall within the scope of the claims of this application and their equivalent technologies.

[0027] These and other aspects of the present application will become more apparent from the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A flow chart of a mixed pulverizing method of a coal mill provided in an embodiment of the present invention;

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

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

[0032] Figure 4 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

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

[0036] In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include other steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0037] It should be mentioned before discussing exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe various operations (or steps) as sequential processes, many operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of various operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to methods, functions, procedures, subroutines, subprograms, etc. In addition, the embodiments in the present invention and the features in the embodiments can be combined with each other without conflict.

[0038] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0039] In the description of the present application, unless otherwise specified, “plurality” means two or more.

[0040] Figure 1 The present invention provides a flow chart of a coal mill mixing and pulverizing method. This embodiment is applicable to situations where a coal mill is required to mix and pulverize coal and biomass. The method can be performed by a coal mill mixing and pulverizing device, which can be implemented in hardware / software. The device can be integrated into an electronic device, such as a computer, and the present invention does not limit this. Figure 1 As shown, the specific steps include:

[0041] Step 110: Calculate the blending ratio of biomass and coal according to the volatile matter of biomass and the volatile matter of coal.

[0042] Specifically, biomass refers to various organisms formed by photosynthesis, including all animals, plants and microorganisms. For example, biomass can be rice husks, straw or corn straw. The volatile matter of biomass refers to all gaseous products that are decomposed and precipitated from its organic matter after the biomass is heated under specified conditions (such as 900 degrees Celsius (℃)) in an airtight manner. The volatile matter of coal refers to the liquid (vapor state) and gas decomposed from the coal after the coal is heated under specified conditions (such as 900℃) in an airtight manner, minus its water content. The blending ratio of biomass and coal refers to the proportional relationship between the mass of biomass and coal when pulverizing. For example, the blending ratio of biomass and coal can be 3:2, that is, the ratio of the mass of biomass to the mass of coal is 3:2.

[0043] In a specific implementation, the types of coal mill, biomass and coal required can be determined first according to actual needs or situations. Then, the volatile matter of biomass is determined in the correspondence table between biomass and volatile matter based on the type of biomass, the volatile matter of coal is determined in the correspondence table between coal and volatile matter based on the type of coal mill, and the maximum volatile matter of coal mill is determined in the correspondence table between coal mill and volatile matter based on the type of coal mill. Then, the blending ratio of biomass and coal can be calculated according to the maximum volatile matter of coal mill, the volatile matter of biomass and the volatile matter of coal. Specifically, the volatile matter of biomass can be used as the first independent variable of the blending ratio calculation formula, the volatile matter of coal can be used as the second independent variable of the blending ratio calculation formula, and the maximum volatile matter of coal mill can be used as the dependent variable of the blending ratio calculation formula. The blending ratio calculation formula is solved based on the first independent variable of the blending ratio calculation formula, the second independent variable of the blending ratio calculation formula and the dependent variable, and the blending ratio of biomass and the blending ratio of coal are obtained, and the sum of the blending ratio of biomass and the blending ratio of coal is one. Finally, the ratio of the biomass blending ratio to the coal blending ratio is calculated to obtain the biomass and coal blending ratio.

[0044] It should be noted that the corresponding relationship table between biomass and volatile matter, the corresponding relationship table between coal and volatile matter, and the corresponding relationship table between coal mill and volatile matter are 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 the volatile matter of coal, so that the blending ratio of biomass and coal can be automatically determined, and the accuracy of the blending ratio determination is improved, thereby improving the stability of the pulverizing process and further ensuring the safety of the pulverizing process.

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

[0047] Specifically, the mixed calorific value refers to the heat released per unit mass or per unit volume of the mixture obtained after biomass and coal are mixed according to the blending ratio of biomass and coal. Boiler load refers to the amount of heat or evaporation generated per unit time during the operation of the boiler. The mixed demand refers to the total mass of the mixed fuel (such as a mixture of biomass and coal) required to reach a specific boiler load.

[0048] In a specific implementation, the calorific value of biomass can be determined in a table of correspondence between biomass and calorific value based on the type of biomass, and the calorific value of coal can be determined in a table of correspondence between coal and calorific value based on the type of coal. Then, the mixed calorific value of biomass and coal at the blending ratio can be determined based on the calorific value of biomass and the calorific value of coal. Specifically, the mixed calorific value at the blending ratio of biomass and coal = calorific value of biomass × blending ratio of biomass + calorific value of coal × blending ratio of coal. After that, the ratio of boiler load to mixed calorific value can be calculated to obtain the mixed demand of biomass and coal.

[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 to automatically calculate and output the mixed demand of biomass and coal through the algorithm of the DCS system.

[0050] It should be noted that the corresponding relationship table between biomass and calorific value and the corresponding relationship table between coal and calorific value are obtained in advance based on experiments.

[0051] In this embodiment, through the above steps, the accuracy of the determined mixing requirement of biomass and coal can be improved, and the failure rate of the coal mill during operation can be reduced, thereby extending the life of the coal mill.

[0052] Step 130: determine the primary air volume of the coal mill according to the mixing demand.

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

[0054] In a specific implementation, the type of the mixture of biomass and coal can be determined according to the type of biomass and the type of coal, and the corresponding relationship table of the blending ratio and the air-coal ratio of the mixture can be determined according to the type of the mixture, and then the air-coal ratio of the mixture can be determined in the corresponding relationship table of the blending ratio and the air-coal ratio of the mixture according to the blending ratio of biomass and coal. Finally, the product of the mixing demand 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 between the blending ratio and the air-coal ratio of each mixture is 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 primary air volume of the coal mill can be automatically calculated and output by the DCS system.

[0057] In this embodiment, the primary air volume of the coal mill is determined according to the mixing demand, which provides a data basis for subsequent pulverizing.

[0058] Step 140: determine the primary air temperature of the coal mill according to the ignition temperature of the biomass.

[0059] Specifically, the ignition temperature of biomass refers to the lowest temperature at which biomass starts to burn continuously. The primary air temperature of the coal mill refers to the temperature of the air that is fed into the coal mill and carries the ground powder into the boiler burner.

[0060] In a specific implementation, the primary air temperature of the coal mill = the ignition temperature of the biomass - the preset temperature, wherein the preset temperature refers to a temperature determined according to actual conditions or needs to prevent the biomass from burning during pulverizing, 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 according to the ignition temperature of the biomass, which can avoid the explosion or spontaneous combustion of the biomass in the coal mill and ensure the safety of the pulverizing process.

[0062] Step 150, pulverizing is performed according to the blending ratio of biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

[0063] Specifically, pulverizing refers to the process of using a coal mill to grind block or granular biomass and coal according to specific requirements (such as the blending ratio of biomass and coal, mixing requirements, primary air volume and primary air temperature) to transform them into fine powder materials that meet the subsequent combustion or utilization requirements.

[0064] In a specific implementation, after determining the blending ratio of biomass and coal, the required amount of mixing, the primary air volume and the primary air temperature, the biomass and coal can be input into the coal mill according to the aforementioned blending ratio of biomass and coal, the windshield of the coal mill is controlled to stabilize the primary air temperature at the aforementioned primary air temperature, and the ventilator of the coal mill is regulated to adjust the air door opening to stabilize the primary air volume at the aforementioned primary air volume. Then, the coal mill is started to pulverize according to the aforementioned requirements to obtain a mixture of biomass and coal.

[0065] In this embodiment, pulverizing is performed according to the blending ratio of biomass and coal, the mixing requirement, the primary air volume and the primary air temperature, which not only improves the pulverizing efficiency but also ensures the safety during the pulverizing process.

[0066] In the embodiment of the present invention, the blending ratio of biomass and coal is first calculated based on the volatile matter of biomass and the volatile matter of coal, so as to realize the automatic determination of the blending ratio of biomass and coal, and improve the accuracy of the determination of the blending ratio, thereby improving the stability in the pulverizing process, and further ensuring the safety in the pulverizing process. Then, the mixed calorific value under the blending ratio of biomass and coal is identified, and the mixed demand of biomass and coal required to reach the boiler load under the mixed calorific value is identified, thereby improving the accuracy of the determined mixed demand of biomass and coal, reducing the failure rate of the coal mill during operation, thereby extending the life of the coal mill. Then, the primary air volume of the coal mill is determined according to the mixed demand, providing a data basis for subsequent pulverizing. Then, the primary air temperature of the coal mill is determined according to the ignition temperature of the biomass, so as to avoid the explosion or spontaneous combustion of biomass in the coal mill, and ensure the safety in the pulverizing process. Finally, pulverizing is carried out according to the blending ratio of biomass and coal, the mixing requirements, the primary air volume and the primary air temperature, which improves the pulverizing efficiency while ensuring the safety of the pulverizing process, and solves the problems of low efficiency and uneven mixing in the existing technology that lead to safety risks of the coal mill.

[0067] Figure 2 A flow chart of another method for mixing and pulverizing coal in a coal mill provided in an embodiment of the present invention is provided. This embodiment is specific based on the above embodiment. In this embodiment, the method may further include:

[0068] Step 210: taking the volatile matter of biomass as the first independent variable of the formula for calculating the blending ratio, taking the volatile matter of coal as the second independent variable of the formula for calculating the blending ratio, and taking the maximum volatile matter of the coal mill as the dependent variable of the formula for calculating the blending ratio.

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

[0070] In a specific implementation, the types of coal mill, biomass and coal required can be determined first according to actual needs or situations, and then the volatile matter of biomass can be determined in a correspondence table between biomass and volatile matter based on the type of biomass, the volatile matter of coal can be determined in a correspondence table between coal and volatile matter based on the type of coal, and the maximum volatile matter of the coal mill can be determined in a correspondence table between coal mill and volatile matter based on the type of coal mill. Then, the volatile matter of biomass is used as the first independent variable of the blending ratio calculation formula, the volatile matter of coal is used as the second independent variable of the blending ratio calculation formula, and the maximum volatile matter of the coal mill is used as the dependent variable of the blending ratio calculation formula.

[0071] It should be noted that the correspondence table between biomass and volatile matter, the correspondence table between coal and volatile matter, and the correspondence table between coal mill and volatile matter are all obtained in advance based on experiments or inquiries to existing technical literature.

[0072] Step 211, solving 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 blending ratio of biomass and the blending ratio of coal.

[0073] Specifically, the sum of the biomass blending ratio and the coal blending ratio is 1. The biomass blending ratio refers to the ratio of biomass in the mixture of biomass and coal. The coal blending ratio refers to the ratio of coal in the mixture of biomass and coal.

[0074] In a specific implementation, after obtaining the first independent variable of the blending ratio calculation formula, the second independent variable of the blending ratio calculation formula, the dependent variable, and the constraints of the blending ratio of biomass and the blending ratio of coal (such as the sum of the blending ratio of biomass and the blending ratio of coal is one), these data can be brought into the blending ratio calculation formula to obtain the blending ratio of biomass and the blending ratio of coal. 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, that is, the dependent variable of the blending ratio calculation formula, x1 represents the volatile matter of biomass, that is, the first independent variable of the blending ratio calculation formula, x2 represents the volatile matter of coal, that is, the second independent variable of the blending ratio calculation formula, a represents the blending ratio of biomass, and b represents the blending ratio of coal.

[0075] In this embodiment, through the above steps, the accuracy and rationality of the determined biomass blending ratio and coal blending ratio are improved, thereby improving the accuracy of the subsequently determined biomass and coal blending ratio, thereby improving the stability and safety of the pulverizing process.

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

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

[0078] Step 213, taking the calorific value of biomass as the first independent variable of the mixed calorific value calculation formula, taking the blending ratio of biomass as the first independent variable coefficient of the mixed calorific value calculation formula, taking the calorific value of coal as the second independent variable of the mixed calorific value calculation formula, taking the blending ratio of coal as the second independent variable coefficient of the mixed calorific value calculation formula.

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

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

[0081] It should be noted that the corresponding relationship table between biomass and calorific value and the corresponding relationship table between coal and calorific value are obtained in advance based on experiments or inquiries to existing technical literature.

[0082] Step 214, 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 of the mixed calorific value calculation formula to obtain the mixed calorific value.

[0083] In a specific implementation, after obtaining the first independent variable, the first independent variable coefficient, the second independent variable and the second independent variable coefficient of the mixed calorific value calculation formula, these data can be brought into the mixed calorific value calculation formula to obtain the mixed calorific value. The mixed calorific value calculation formula can be: a×y1+b×y2=y, where y represents the mixed calorific value, y1 represents the calorific value of biomass, that is, the first independent variable of the mixed calorific value calculation formula, y2 represents the calorific value of coal, that is, the second independent variable of the mixed calorific value calculation formula, a represents the blending ratio of biomass, that is, the first independent variable coefficient of the mixed calorific value calculation formula, and b represents the blending ratio of coal, that is, the second independent variable coefficient of the mixed calorific value calculation formula.

[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 mixed demand.

[0086] In specific implementation, in actual application, it can be determined that the mixed demand = boiler load / mixed calorific value.

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

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

[0089] Specifically, the type of biomass includes information about the type of biomass or information about the type of biomass and information about the origin of the biomass, which is not limited in the embodiment of the present invention. The type of coal includes information about the type of coal or information about the type of coal and information about the origin of the coal, which is not limited in the embodiment of the present invention. A mixture of biomass and coal refers to a fuel obtained by mixing biomass and coal in a certain proportion.

[0090] Exemplarily, if the type of biomass is rice husk and the type of coal is bituminous coal, the corresponding relationship table of the blending ratio and the air-coal ratio corresponding to each mixture includes Table A of the corresponding relationship between the blending ratio and the air-coal ratio of rice husk-bituminous coal, and Table B of the corresponding relationship between the blending ratio and the air-coal ratio of corn straw-bituminous coal. If the type of the mixture is rice husk-bituminous coal, the corresponding relationship table of the blending ratio and the air-coal ratio of the mixture is Table A.

[0091] Exemplarily, if the type of biomass is rice husk from origin 1 and the type of coal is bituminous coal from origin 2, the corresponding relationship table of the blending ratio and the wind-coal ratio of each mixture includes Table C of the correspondence between the blending ratio and the wind-coal ratio of rice husk from origin 1 and bituminous coal from origin 2, and Table D of the correspondence between the blending ratio and the wind-coal ratio of rice husk from origin 1 and bituminous coal from origin 1. Then the type of the mixture is rice husk from origin 1-bituminous coal from origin 2, and the corresponding relationship table of the blending ratio and the wind-coal ratio of the mixture is Table C.

[0092] It should be noted that the corresponding relationship table between the blending ratio and the air-coal ratio of each mixture is obtained in advance based on experiments.

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

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

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

[0096] In a specific implementation, after determining the correspondence table between the blending ratio and the air-coal ratio corresponding to the mixture, the determined blending ratio and the air-coal ratio correspondence table can be queried based on the blending ratio of biomass and coal to obtain the air-coal ratio of the mixture.

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

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

[0099] In specific implementation, in actual application, it can be determined that the primary air volume = the mixing demand × the air-coal ratio of the mixture.

[0100] In this embodiment, by obtaining the primary air volume, a data basis is provided for subsequent powder making.

[0101] Step 219: determine the primary air temperature of the coal mill according to the ignition temperature of the biomass.

[0102] Specifically, the primary air temperature of the coal mill is not greater than the ignition temperature of the biomass. For example, if the ignition temperature of the biomass is 400°C, the primary air temperature of the coal mill is 350°C.

[0103] Step 220, pulverizing is performed according to the blending ratio of biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

[0104] Therefore, the technical solution of the present invention first takes the volatile matter of biomass as the first independent variable of the blending ratio calculation formula, takes the volatile matter of coal as the second independent variable of the blending ratio calculation formula, takes the maximum volatile matter of the coal mill as the dependent variable of the blending ratio calculation formula, and then solves 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 blending ratio of biomass and the blending ratio of coal, thereby improving the accuracy and rationality of the determined blending ratio of biomass and the blending ratio of coal, and then improving the accuracy of the subsequently determined blending ratio of biomass and coal, thereby improving the stability and safety of the pulverizing process. Afterwards, based on the blending ratio of biomass and the blending ratio of coal, the blending ratio of biomass and coal is calculated. Then, the calorific value of biomass is taken as the first independent variable of the mixed calorific value calculation formula, the blending ratio of biomass is taken as the first independent variable coefficient of the mixed calorific value calculation formula, the calorific value of coal is taken as the second independent variable of the mixed calorific value calculation formula, and the blending ratio of coal is taken as the second independent variable coefficient of the mixed calorific value calculation formula. Then, the mixed calorific value calculation formula is solved based on the first independent variable, the first independent variable coefficient, the second independent variable and the second independent variable coefficient of the mixed calorific value calculation formula to obtain the mixed calorific value, thereby improving the accuracy of the determined mixed calorific value. Then, the ratio of the boiler load to the mixed calorific value is calculated to obtain the mixed demand, thereby improving the efficiency and accuracy of determining the mixed demand. Then, the type of the mixture of biomass and coal is determined according to the type of biomass and the type of coal, and the corresponding relationship table of the blending ratio and the wind-coal ratio of the mixture is determined according to the type of the mixture, thereby providing a data basis for determining the wind-coal ratio of the mixture. Then, the wind-coal ratio of the mixture is determined in the corresponding relationship table of the blending ratio and the wind-coal ratio of the mixture according to the blending ratio of biomass and coal, thereby improving the accuracy of the determined wind-coal ratio. After that, the product of the mixing requirement and the air-coal ratio of the mixture is calculated to obtain the primary air volume, which provides a data basis for the subsequent pulverizing. The primary air temperature of the pulverizer is then determined based on the ignition temperature of the biomass, which avoids the explosion or spontaneous combustion of the biomass in the pulverizer and ensures the safety of the pulverizing process. Finally, pulverizing is carried out according to the blending ratio of biomass and coal, the mixing requirement, the primary air volume and the primary air temperature, which improves the pulverizing efficiency while ensuring the safety of the pulverizing process, and solves the problem of low efficiency and uneven mixing in the existing technology that leads to safety risks in the pulverizer.

[0105] Figure 3 A structural schematic diagram of a mixing and pulverizing device for a coal mill is provided in an embodiment of the present invention. The device and the mixing and pulverizing methods for a coal mill in the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiments of the mixing and pulverizing device for a coal mill, reference can be made to the embodiments of the mixing and pulverizing method for a coal mill in the above-mentioned embodiments.

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

[0107] A calculation module 310 is used to calculate the blending ratio of biomass and coal according to the volatile matter of biomass and the volatile matter of coal;

[0108] An 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 to achieve the boiler load at the mixed calorific value;

[0109] An air volume determination module 330, configured to determine the primary air volume of the coal mill according to the mixing demand;

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

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

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

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

[0114] Solving the blending ratio calculation formula based on the first independent variable of the blending ratio calculation formula, the second independent variable of the blending ratio calculation formula and the dependent variable to obtain the blending ratio of biomass and the blending ratio of coal, wherein the sum of the blending ratio of biomass and the blending ratio of coal is one;

[0115] Based on the blending ratio of the biomass and the blending ratio of the coal, the blending ratio of the biomass and the coal is calculated.

[0116] Based on the above embodiment, 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 of the mixed calorific value calculation formula, the blending ratio of the biomass is used as the first independent variable coefficient of the mixed calorific value calculation formula, the calorific value of coal is used as the second independent variable of the mixed calorific value calculation formula, and the blending ratio of the coal is used as the second independent variable coefficient of the mixed calorific value calculation formula;

[0118] The mixed calorific value calculation formula is solved based on the first independent variable of the mixed calorific value calculation formula, the first independent variable coefficient, the second independent variable of the mixed calorific value calculation formula, and the second independent variable coefficient to obtain the mixed calorific value.

[0119] Based on the above embodiment, the identification module 320 identifies the required amount of biomass and coal mixed to achieve the boiler load under 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 embodiment, the air volume determination module 330 is specifically used for:

[0122] Determining the air-to-coal ratio of the biomass-to-coal mixture according to the blending ratio of the biomass and the coal;

[0123] The product of the mixing demand and the air-coal ratio is calculated to obtain the primary air volume.

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

[0125] Determine the type of the mixture according to the type of biomass and the type of coal, and determine a corresponding relationship table of the blending ratio and the air-coal ratio corresponding to the mixture according to the type of the mixture;

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

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

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

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

[0130] Figure 4 A schematic diagram of the structure of an electronic device provided by 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 only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

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

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

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

[0134] The 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. The electronic device 4 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 4 not shown, usually called a "hard drive"). Although Figure 4 Not shown in the figure, 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, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The system memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various 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 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. Program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0136] The electronic device 4 may also communicate with one or more external devices 14 (e.g., keyboards, pointing devices, displays 24, etc.), one or more devices that enable a user to interact with the electronic device 4, and / or any device that enables the electronic device 4 to communicate with one or more other computing devices (e.g., network cards, modems, etc.). Such communication may be performed via an input / output (I / O) interface 22. Furthermore, the electronic device 4 may also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) via a network adapter 20. Figure 4 As shown, the network adapter 20 communicates with other modules of the electronic device 4 via the bus 18. It should be understood that although Figure 4 Not shown, other hardware and / or software modules may be used in conjunction with the electronic device 4, 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] The processing unit 16 executes various functional applications and page displays by running the program stored in the system memory 28, for example, implementing the mixed pulverizing method of the coal mill provided in the embodiment of the present invention, the method comprising:

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

[0139] Identifying the mixed calorific value of the biomass and coal at the blending ratio, and identifying the required amount of biomass and coal to achieve the boiler load at the mixed calorific value;

[0140] Determining the primary air volume of the coal mill according to the mixing demand;

[0141] Determining the primary air temperature of the coal mill according to the ignition temperature of the biomass;

[0142] Pulverizing is performed according to the blending ratio of the biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

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

[0144] An embodiment of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a mixed pulverizing method of a coal mill provided in an embodiment of the present invention is implemented, for example, the method comprising:

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

[0146] Identifying the mixed calorific value of the biomass and coal at the blending ratio, and identifying the required amount of biomass and coal to achieve the boiler load at the mixed calorific value;

[0147] Determining the primary air volume of the coal mill according to the mixing demand;

[0148] Determining the primary air temperature of the coal mill according to the ignition temperature of the biomass;

[0149] Pulverizing is performed according to the blending ratio of the biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

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

[0151] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0152] The program code embodied on the computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

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

[0154] It should be understood by those skilled in the art that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, optionally, they can be implemented by a program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0155] In addition, the acquisition, storage, use, and processing of data in the technical solution of the present invention are in compliance with the relevant provisions of national laws and regulations.

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

Claims

1. A mixed pulverizing method for a coal mill, characterized in that: The method comprises: The blending ratio of biomass and coal is calculated based on the volatile matter of biomass and the volatile matter of coal; Identifying the mixed calorific value of the biomass and coal at the blending ratio, and identifying the required amount of biomass and coal to achieve the boiler load at the mixed calorific value; Determining the primary air volume of the coal mill according to the mixing demand; Determining the primary air temperature of the coal mill according to the ignition temperature of the biomass; Pulverizing is performed according to the blending ratio of the biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

2. The mixed pulverizing method of coal mill according to claim 1, characterized in that: The blending ratio of biomass and coal is calculated based on the volatile matter of biomass and the volatile matter of coal, including: The volatile matter of the biomass is used as the first independent variable of the blending ratio calculation formula, the volatile matter of the coal is used as the second independent variable of the blending ratio calculation formula, and the maximum volatile matter of the coal mill is used as the dependent variable of the blending ratio calculation formula; Solving the blending ratio calculation formula based on the first independent variable of the blending ratio calculation formula, the second independent variable of the blending ratio calculation formula and the dependent variable to obtain the blending ratio of biomass and the blending ratio of coal, wherein the sum of the blending ratio of biomass and the blending ratio of coal is one; Based on the blending ratio of the biomass and the blending ratio of the coal, the blending ratio of the biomass and the coal is calculated.

3. The mixed pulverizing method of coal mill according to claim 2, characterized in that: Identify the mixed calorific value of the biomass and coal at the blending ratio, including: The calorific value of biomass is used as the first independent variable of the mixed calorific value calculation formula, the blending ratio of the biomass is used as the first independent variable coefficient of the mixed calorific value calculation formula, the calorific value of coal is used as the second independent variable of the mixed calorific value calculation formula, and the blending ratio of the coal is used as the second independent variable coefficient of the mixed calorific value calculation formula; The mixed calorific value calculation formula is solved based on the first independent variable of the mixed calorific value calculation formula, the first independent variable coefficient, the second independent variable of the mixed calorific value calculation formula, and the second independent variable coefficient to obtain the mixed calorific value.

4. The mixed pulverizing method of coal mill according to claim 1, characterized in that: Identify the required blend of biomass and coal to achieve the boiler load at the desired combined heating value, including: The ratio of the boiler load to the mixed calorific value is calculated to obtain the mixed demand.

5. The mixed pulverizing method of coal mill according to claim 1, characterized in that: The primary air volume of the coal mill is determined according to the mixing demand, including: Determining the air-to-coal ratio of the biomass-to-coal mixture according to the blending ratio of the biomass and the coal; The product of the mixing demand and the air-coal ratio is calculated to obtain the primary air volume.

6. The mixed pulverizing method of coal mill according to claim 5, characterized in that: The air-coal ratio of the mixture of biomass and coal is determined according to the blending ratio of the biomass and coal, including: Determine the type of the mixture according to the type of biomass and the type of coal, and determine a corresponding relationship table of the blending ratio and the air-coal ratio corresponding to the mixture according to the type of the mixture; The air-coal ratio is determined according to the blending ratio of the biomass and coal in the corresponding relationship table of the blending ratio corresponding to the mixture and the air-coal ratio.

7. The mixed pulverizing method of coal mill according to claim 1, characterized in that: The primary air temperature of the coal mill is not greater than the ignition temperature of the biomass.

8. A coal mill mixing and pulverizing device, characterized in that: The device comprises: A calculation module, used for calculating the blending ratio of biomass and coal according to the volatile matter of biomass and the volatile matter of coal; An identification module, used to identify the mixed calorific value of the biomass and coal at the blending ratio, and to identify the required amount of the biomass and coal to achieve the boiler load at the mixed calorific value; An air volume determination module, used for determining the primary air volume of the coal mill according to the mixing demand; An air temperature determination module, used to determine the primary air temperature of the coal mill according to the ignition temperature of the biomass; The pulverizing module is used to pulverize the biomass according to the blending ratio of the biomass and coal, the mixing requirement, the primary air volume and the primary air temperature.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; Wherein, the memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the mixed pulverizing method of the coal mill described in any one of claims 1-7.

10. A storage medium containing computer executable instructions, characterized in that: The computer executable instructions, when executed by a computer processor, implement the mixed pulverizing method for a coal mill as described in any one of claims 1-7.

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