Method and device for determining methane emission amount in coal preparation plant and electronic equipment

Abstract

The invention discloses a method and device for determining the methane emission amount in a coal preparation plant and electronic equipment. The method comprises the steps that first proportion information corresponding to raw coal in a coal preparation plant and second proportion information corresponding to commercial coal in the coal preparation plant are obtained, the first proportion information is used for representing the proportion of the raw coal under different particle sizes in the total amount of the raw coal, and the second proportion information is used for representing the proportion of the commercial coal under different particle sizes in the total amount of the commercial coal; determining first content information of the raw coal under different particle sizes based on the first proportion information, and determining second content information of commercial coal under different particle sizes based on the second proportion information; and respectively acquiring yield information corresponding to the raw coal and the commercial coal, and determining the methane discharge amount of the coal preparation plant within the target duration at least based on the yield information, the first content information and the second content information. The method solves the technical problem that the accuracy of determining the methane emission in the coal preparation plant is low.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental monitoring, and in particular to a method, a device and an electronic device for determining the amount of methane emissions in a coal preparation plant. Background Art

[0002] As the dominant energy source in China's energy structure, coal is of great significance to national energy security and economic development. However, the negative impact of greenhouse gas emissions such as methane caused by leakage or leakage during coal mining, transportation and washing cannot be ignored. Methane has a strong greenhouse effect and is one of the important causes of global climate change. In coal preparation plants, due to the need for a large amount of power, equipment and funds for the sorting and processing of raw coal in coal preparation plants, the methane emissions in coal preparation plants are usually higher than those in the mining and transportation stages of raw coal in coal preparation plants. Therefore, accurately calculating the methane emissions in coal preparation plants is of great significance for guiding the reduction of greenhouse gas emissions in the coal industry.

[0003] In the related art, the coal methane emission calculation method is mostly based on the methane emission calculation model of coal mining and transportation. This type of model assumes that the methane emissions in the coal mining and transportation stages are consistent. The calculated coal methane emissions often have a large deviation from the actual emissions, which is not conducive to accurately calculating the methane emissions in the coal preparation plant. Therefore, there is still a technical problem of low accuracy in determining the methane emissions in the coal preparation plant.

[0004] Currently, no effective solution has been proposed for the above technical problems. Summary of the invention

[0005] The embodiments of the present invention provide a method, device and electronic equipment for determining the methane emission amount in a coal preparation plant, so as to at least solve the technical problem of low accuracy in determining the methane emission amount in the coal preparation plant.

[0006] According to one aspect of an embodiment of the present invention, a method for determining methane emissions in a coal preparation plant is provided. The method may include: obtaining first proportion information corresponding to raw coal in the coal preparation plant, and second proportion information corresponding to commercial coal in the coal preparation plant, wherein the first proportion information is used to indicate the proportion of raw coal at different particle sizes in the total amount of raw coal, and the second proportion information is used to indicate the proportion of commercial coal at different particle sizes in the total amount of commercial coal; based on the first proportion information, determining first content information of raw coal at different particle sizes, and based on the second proportion information, determining second content information of commercial coal at different particle sizes, wherein the first content information is used to indicate the methane content in raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in commercial coal at the corresponding particle size; respectively obtaining production information corresponding to raw coal and commercial coal, and determining methane emissions of the coal preparation plant within a target time length based on at least the production information, the first content information, and the second content information, wherein the production information is used to indicate the production of raw coal and commercial coal respectively within the target time length.

[0007] Optionally, before obtaining the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant, the method also includes: obtaining multiple first particle size range information corresponding to the raw coal, and screening the raw coal according to the multiple first particle size range information to obtain raw coal that meets different first particle size range information; obtaining multiple second particle size range information corresponding to the commercial coal, and screening the commercial coal according to the multiple second particle size range information to obtain commercial coal that meets different second particle size range information, wherein the number of the first particle size range information is greater than the number of the second particle size range information.

[0008] Optionally, obtaining first proportion information corresponding to raw coal in a coal preparation plant includes: obtaining the total mass of the total amount of raw coal, and measuring the mass of raw coal that satisfies different first particle size range information; determining the first proportion information based on the total mass of the total amount of raw coal and the mass corresponding to different first particle size range information; obtaining second proportion information corresponding to commercial coal in a coal preparation plant includes: obtaining the total mass of the total amount of commercial coal, and measuring the mass of commercial coal that satisfies different second particle size range information; determining the second proportion information based on the total mass of the total amount of commercial coal and the mass corresponding to different second particle size range information.

[0009] Optionally, based on the first proportion information, the first content information of the raw coal at different particle sizes is determined, including: obtaining methane content data in the raw coal at different first particle size range information; based on the first proportion information, determining the mass proportion of the whole particle size range of the raw coal; based on the methane content data and mass proportion in the raw coal, determining the first content information.

[0010] Optionally, based on the second proportion information, the second content information of the commercial coal at different particle sizes is determined, including: obtaining the methane content data in the commercial coal at different second particle size range information; based on the second proportion information, determining the mass proportion of the full particle size range of the commercial coal; based on the methane content data and mass proportion in the commercial coal, determining the second content information.

[0011] Optionally, the coal preparation plant includes gangue, and the method also includes: obtaining first production information corresponding to the gangue; determining the methane emissions of the coal preparation plant within the target time period based at least on the production information, the first content information and the second content information, including: determining the methane emissions based on the production information, the first production information, the first content information and the second content information.

[0012] Optionally, the production information includes raw coal production and commercial coal production, wherein methane emissions are determined based on the production information, first production information, first content information and second content information, including: obtaining the production difference between the first production information and the raw coal production; and determining methane emissions based on the production difference, commercial coal production, first content information and second content information.

[0013] According to another aspect of an embodiment of the present invention, a device for determining methane emissions in a coal preparation plant is also provided. The device may include: an acquisition unit, used to acquire first proportion information corresponding to raw coal in the coal preparation plant, and second proportion information corresponding to commercial coal in the coal preparation plant, wherein the first proportion information is used to indicate the proportion of raw coal at different particle sizes in the total amount of raw coal, and the second proportion information is used to indicate the proportion of commercial coal at different particle sizes in the total amount of commercial coal; a first determination unit, used to determine first content information of raw coal at different particle sizes based on the first proportion information, and to determine second content information of commercial coal at different particle sizes based on the second proportion information, wherein the first content information is used to indicate the methane content in raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in commercial coal at the corresponding particle size; a second determination unit, used to respectively acquire production information corresponding to raw coal and commercial coal, and determine methane emissions of the coal preparation plant within a target time period based on at least the production information, the first content information, and the second content information, wherein the production information is used to indicate the production of raw coal and commercial coal respectively within the target time period.

[0014] According to another aspect of an embodiment of the present invention, an electronic device is also provided, which may include a memory and a processor, wherein a computer program is stored in the memory and the processor may be configured to run the computer program to execute a method for determining methane emissions in a coal preparation plant.

[0015] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, which includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention.

[0016] According to another aspect of an embodiment of the present invention, a processor is provided, which is used to run a program, wherein when the program is run, the method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention is executed.

[0017] According to another aspect of the present invention, a computer program product is provided, which includes a computer program, and when executed by a processor, the computer program implements the method for determining methane emissions in a coal preparation plant according to the embodiment of the present application.

[0018] In an embodiment of the present invention, if it is to determine the methane emissions in a coal preparation plant, first proportion information represented by the proportion of raw coal at different particle sizes corresponding to the raw coal in the coal preparation plant in the total amount of raw coal, and second proportion information represented by the proportion of commercial coal at different particle sizes corresponding to the commercial coal in the coal preparation plant in the total amount of commercial coal can be obtained; based on the first proportion information, first content information represented by the methane content in the raw coal at the corresponding particle sizes of the raw coal at different particle sizes can be determined, and based on the second proportion information, second content information represented by the methane content in the commercial coal at the corresponding particle sizes of the commercial coal at different particle sizes can be determined; the output information corresponding to the raw coal and the commercial coal is respectively obtained, and based on at least the output information, the first content information and the second content information, the methane emissions of the coal preparation plant within the target time can be determined. In this embodiment, since the methane emissions in the coal preparation plant are closely related to the types of coal in the coal preparation plant (for example, raw coal and commercial coal), the particle sizes of the raw coal and commercial coal, and the methane contents in the raw coal and commercial coal at different particle sizes, the above method is used to accurately measure the methane emissions in the coal preparation plant based on the different particle size distributions of the raw coal and commercial coal in the coal preparation plant, thereby achieving the technical effect of improving the accuracy of determining the methane emissions in the coal preparation plant and solving the technical problem of low accuracy in determining the methane emissions in the coal preparation plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 is a flow chart of a method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention;

[0021] Figure 2is a flow chart of a method for calculating methane emissions within an emission boundary range of a coal preparation plant according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of a device for determining methane emissions in a coal preparation plant according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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 necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] According to an embodiment of the present invention, an embodiment of a method for determining methane emissions in a coal preparation plant is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0026] Figure 1 is a flow chart of a method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention. Figure 1 As shown, the method may include the following steps:

[0027] Step S102, obtaining first proportion information corresponding to raw coal in the coal preparation plant, and second proportion information corresponding to commercial coal in the coal preparation plant.

[0028] In the technical solution provided in the above step S102 of the present invention, the first proportion information can be used to indicate the proportion of raw coal at different particle sizes in the total amount of raw coal. The second proportion information can be used to indicate the proportion of commercial coal at different particle sizes in the total amount of commercial coal. Raw coal can be coal mined directly from underground or open-pit coal mines without any processing. Raw coal can contain various impurities, such as rocks, soil, sulfur, ash, etc., and its particle size varies. Commercial coal can be coal processed by a coal preparation plant, and the above-mentioned processing can include cleaning, grading, crushing, dehydration, etc., which can remove impurities and improve the quality and calorific value of coal. Commercial coal can be lump coal (larger particle size, usually used for industrial and household heating), pulverized coal (smaller particle size, usually used in power plants), etc. Commercial coal and raw coal can be emission sources of methane released in coal preparation plants.

[0029] In this embodiment, if it is necessary to determine the methane emissions in the coal preparation plant, the first proportion information corresponding to the raw coal stored in the coal preparation plant can be obtained, and the second proportion information corresponding to the commercial coal in the coal preparation plant can also be obtained.

[0030] Optionally, by obtaining the first proportion information corresponding to the raw coal stored in the coal preparation plant, the distribution of raw coal of different particle sizes in the total raw coal can be obtained. By obtaining the second proportion information corresponding to the commercial coal in the coal preparation plant, the distribution of commercial coal of different particle sizes in the total commercial coal can be understood.

[0031] Step S104, based on the first proportion information, determining the first content information of the raw coal at different particle sizes, and based on the second proportion information, determining the second content information of the commercial coal at different particle sizes.

[0032] In the technical solution provided in the above step S104 of the present invention, after obtaining the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant, the first content information of the raw coal at different particle sizes can be determined based on the first proportion information, and the second content information of the commercial coal at different particle sizes can be determined based on the second proportion information. Among them, the first content information can be used to indicate the methane content in the raw coal at the corresponding particle size (also referred to as gas residual content / residual content / residual methane content), that is, the first content information can be the methane content at each particle size scale of the raw coal. The second content information can be used to indicate the methane content in the commercial coal at the corresponding particle size, that is, the second content information can be the methane content at each particle size scale of the commercial coal.

[0033] Optionally, in order to ensure the detection efficiency of the methane content contained in the raw coal and the commercial coal, part of the raw coal can be taken out from the raw coal of each particle size in the total amount of raw coal, and the part of the raw coal under each particle size can be detected by a methane content meter to obtain the methane content information of the part of the raw coal under each particle size scale. Part of the commercial coal can also be taken out from the commercial coal of each particle size in the total amount of commercial coal, and the part of the commercial coal under each particle size can be detected by a methane content meter to obtain the methane content information of the part of the commercial coal under each particle size scale.

[0034] Optionally, after the methane contents of some raw coal and some commercial coal at different particle sizes are respectively detected, the first content information of the raw coal at different particle sizes can be determined based on the first proportion information corresponding to the raw coal at different particle sizes in the coal preparation plant and the methane content information of the above-mentioned part of the raw coal. The second content information of the commercial coal at different particle sizes can also be determined based on the second proportion information corresponding to the commercial coal at different particle sizes in the coal preparation plant and the methane content information of the above-mentioned part of the commercial coal.

[0035] Step S106, respectively obtaining the production information corresponding to the raw coal and the commercial coal, and determining the methane emission of the coal preparation plant within the target time period based at least on the production information, the first content information and the second content information.

[0036] In the technical solution of step S106 of the present invention, after determining the first content information of raw coal at different particle sizes based on the first proportion information, and determining the second content information of commercial coal at different particle sizes based on the second proportion information, the production information corresponding to the raw coal and the commercial coal can be obtained respectively, and the methane emissions of the coal preparation plant within the target time can be determined based on at least the production information, the first content information and the second content information. Among them, the production information can be used to indicate the production of raw coal and commercial coal respectively within the target time. The target time can be a pre-set time for determining the production information of raw coal and commercial coal, or it can be set according to the actual situation of the coal preparation plant. For example, the target time can be pre-set to one day. It should be noted that the setting of the target time is only for example purposes and is not specifically limited here.

[0037] If the target duration is one day, the production information can be the daily raw coal production and the daily commercial coal production. At this time, the methane emissions can be the daily methane emissions within the emission boundary of the coal preparation plant.

[0038] Optionally, the production information of raw coal and commercial coal within the target time period can be obtained by belt scales or other weighing equipment. It should be noted that the above-mentioned method and equipment for obtaining production information are only examples and are not specifically limited here.

[0039] In addition to raw coal and commercial coal, there may be other products (by-products) that release methane in the coal preparation plant, such as gangue. There may also be a weak methane content in the above products. In the embodiment of the present invention, taking the above situation into consideration, in order to ensure the accuracy of determining the methane emissions in the coal preparation plant, the methane content in the above products can also be taken into account. By comprehensively considering the methane content in raw coal and commercial coal, as well as the methane content in other products that may release methane in the coal preparation plant, the methane emissions in the coal preparation plant can be accurately measured, thereby achieving the technical effect of improving the accuracy of determining the methane emissions in the coal preparation plant.

[0040] In the above steps S102 to S106 of the present invention, if it is to determine the methane emissions in the coal preparation plant, first proportion information represented by the proportion of raw coal at different particle sizes corresponding to the raw coal in the coal preparation plant in the total amount of raw coal, and second proportion information represented by the proportion of commercial coal at different particle sizes corresponding to the commercial coal in the coal preparation plant in the total amount of commercial coal can be obtained; based on the first proportion information, first content information represented by the methane content in the raw coal at the particle sizes corresponding to the raw coal at different particle sizes can be determined, and based on the second proportion information, second content information represented by the methane content in the commercial coal at the particle sizes corresponding to the commercial coal at different particle sizes can be determined; the output information corresponding to the raw coal and the commercial coal is respectively obtained, and based on at least the output information, the first content information and the second content information, the methane emissions of the coal preparation plant within the target time can be determined. In this embodiment, since the methane emissions in the coal preparation plant are closely related to the types of coal in the coal preparation plant (for example, raw coal and commercial coal), the particle sizes of the raw coal and commercial coal, and the methane contents in the raw coal and commercial coal at different particle sizes, the above method is used to accurately measure the methane emissions in the coal preparation plant based on the different particle size distributions of the raw coal and commercial coal in the coal preparation plant, thereby achieving the technical effect of improving the accuracy of determining the methane emissions in the coal preparation plant and solving the technical problem of low accuracy in determining the methane emissions in the coal preparation plant.

[0041] The above method of this embodiment is further introduced below.

[0042] As an optional implementation method, before obtaining the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant, the method also includes: obtaining multiple first particle size range information corresponding to the raw coal, and screening the raw coal according to the multiple first particle size range information to obtain raw coal that meets different first particle size range information; obtaining multiple second particle size range information corresponding to the commercial coal, and screening the commercial coal according to the multiple second particle size range information to obtain commercial coal that meets different second particle size range information, wherein the number of the first particle size range information is greater than the number of the second particle size range information.

[0043] In this embodiment, before obtaining the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant, multiple first particle size range information corresponding to the raw coal can be obtained, and the raw coal can be screened according to the multiple first particle size range information to obtain raw coal that meets different first particle size range information; multiple second particle size range information corresponding to the commercial coal can be obtained, and the commercial coal can be screened according to the multiple second particle size range information to obtain commercial coal that meets different second particle size range information. The number of first particle size range information is greater than the number of second particle size range information.

[0044] Optionally, the first particle size range can be set based on the actual situation of the coal processing process and the impact of the raw coal particle size on methane emissions. For example, it can be 0-8mm, 8mm-15mm, 15mm-20mm, 20mm-25mm, and 25mm. The second particle size range can be further subdivided according to the specific type of commercial coal (for example, m types) to more accurately evaluate the methane content of commercial coal. For example, it can be 10mm-20mm, and commercial coal samples of m different scales of commercial coal particle sizes can be screened and weighed.

[0045] In an embodiment of the present invention, the raw coal is screened according to the above-mentioned first particle size range, and the raw coal that meets each particle size range is screened to obtain raw coal samples that meet different particle size ranges, and the mass proportion of raw coal with different particle sizes (first proportion information) can be obtained. According to the second particle size range information of the commercial coal, the commercial coal that meets each particle size range is screened to obtain commercial coal samples that meet different particle size ranges, and the mass proportion of the commercial coal at different particle sizes (second proportion information) can be obtained. Through the above method, the source and magnitude of methane emissions in the coal preparation plant can be comprehensively and carefully evaluated, providing more accurate data support for the formulation of emission reduction measures, thereby achieving more effective methane emission control and environmental management.

[0046] As an optional implementation method, step S102, obtaining the first proportion information corresponding to the raw coal in the coal preparation plant, including: obtaining the total mass of the total amount of raw coal, and measuring the mass of the raw coal that meets different first particle size range information; determining the first proportion information based on the total mass of the total amount of raw coal and the mass corresponding to different first particle size range information; obtaining the second proportion information corresponding to the commercial coal in the coal preparation plant, including: obtaining the total mass of the total amount of commercial coal, and measuring the mass of the commercial coal that meets different second particle size range information; determining the second proportion information based on the total mass of the total amount of commercial coal and the mass corresponding to different second particle size range information.

[0047] In this embodiment, in the process of obtaining the first proportion information corresponding to the raw coal in the coal preparation plant, the total mass of the total amount of raw coal can be obtained, and the mass of the raw coal that meets different first particle size range information can be measured; the first proportion information can be determined based on the total mass of the total amount of raw coal and the mass corresponding to different first particle size range information; the total mass of the total amount of commercial coal can be obtained, and the mass of the commercial coal that meets different second particle size range information can be measured; the second proportion information can be determined based on the total mass of the total amount of commercial coal and the mass corresponding to different second particle size range information.

[0048] Optionally, the total mass of the total amount of raw coal can be obtained using a high-precision weighing device, such as a belt scale or an electronic balance, and can be the total mass of the total amount of raw coal at the entrance of the raw coal bin of the coal preparation plant. The total mass of the total amount of commercial coal can be obtained using a high-precision weighing device, such as a belt scale or an electronic balance, and can be the total mass of the total amount of commercial coal at the exit of the commercial bin of the coal preparation plant. It should be noted that the method of obtaining the total mass of the total amount of raw coal and the total mass of the total amount of commercial coal is only for example and is not specifically limited here.

[0049] Optionally, the raw coal can be screened and classified according to the preset first particle size range information (e.g., 0-8mm, 8-15mm, 15-20mm, 20-25mm, and above 25mm). The mass of raw coal in different particle size ranges is weighed independently to ensure the accuracy of the data. The particle size range of commercial coal may be more limited than that of raw coal, but it still needs to be measured. For example, within the particle size range of 10mm-20mm, it can be further subdivided according to the specific particle size distribution of the commercial coal, and the mass of the commercial coal in each subdivided range can be weighed independently.

[0050] As an optional implementation method, step S104, based on the first proportion information, determines the first content information of the raw coal at different particle sizes, including: obtaining the methane content data in the raw coal under different first particle size range information; based on the first proportion information, determining the mass proportion of the whole particle size range of the raw coal; based on the methane content data and mass proportion in the raw coal, determining the first content information.

[0051] In this embodiment, in the process of determining the first content information of raw coal at different particle sizes based on the first proportion information, the methane content data in the raw coal at different first particle size range information can be obtained; the mass proportion of the whole particle size range of the raw coal can be determined based on the first proportion information; the first content information can be determined based on the methane content data and mass proportion in the raw coal.

[0052] Optionally, a methane content rapid determination instrument can be used to determine the methane content data in the raw coal under different first particle size range information.

[0053] Alternatively, the mass fraction of the full-scale particle size range can be determined by the following formula:

[0054] Q r =ar 2 +br+c

[0055] Wherein, a, b and c may represent fitting parameters; and r may represent particle size.

[0056] Alternatively, the particle size can be determined by the following formula:

[0057]

[0058] Among them, q can represent the residual content; q0 can represent the methane content of the coal seam, which can be obtained from the coal seam geological report; D can represent the equivalent diffusion coefficient.

[0059] Optionally, the first content information, that is, the residual content in the full-scale particle size range, can be determined by the content data and mass percentage of methane in the raw coal, which can be determined by the following formula:

[0060]

[0061] As an optional implementation method, based on the second proportion information, the second content information of the commercial coal at different particle sizes is determined, including: obtaining the methane content data in the commercial coal at different second particle size range information; based on the second proportion information, determining the mass proportion of the commercial coal in the entire particle size range; based on the methane content data and mass proportion in the commercial coal, determining the second content information.

[0062] In this embodiment, in the process of determining the second content information of commercial coal at different particle sizes based on the second proportion information, the methane content data in the commercial coal at different second particle size range information can be obtained; the mass proportion of the entire particle size range of the commercial coal can be determined based on the second proportion information; the second content information can be determined based on the methane content data and mass proportion in the commercial coal.

[0063] Optionally, the second proportion information refers to the mass distribution ratio of commercial coal in each particle size range. The mass proportion of commercial coal in each particle size range can be obtained by weighing or statistical means. The second content information refers to the methane emissions of commercial coal at different particle sizes. The determination of the second content information focuses on the evaluation of methane emissions within the particle size range, which helps to accurately control and reduce methane emissions within the boundary of the coal preparation plant. By combining the methane content data and mass proportion of commercial coal in each particle size range, the methane emissions of commercial coal in each particle size range can be calculated, and the methane emissions of the total commercial coal can be further summarized and calculated.

[0064] As an optional implementation method, the coal preparation plant includes gangue, and the method also includes: obtaining first production information corresponding to the gangue; determining the methane emissions of the coal preparation plant within the target time period based at least on the production information, the first content information and the second content information, including: determining the methane emissions based on the production information, the first production information, the first content information and the second content information.

[0065] In this embodiment, the coal preparation plant includes gangue in addition to raw coal and commercial coal. In the process of obtaining the first production information corresponding to the gangue and determining the methane emission of the coal preparation plant within the target time period based at least on the production information, the first content information and the second content information, the methane emission can be determined based on the production information, the first production information, the first content information and the second content information.

[0066] Optionally, a belt weigher or other weighing equipment can be used to measure the total amount of gangue produced by the coal preparation plant within the target time, that is, the first production information. By screening the gangue samples and classifying them according to the preset particle size range, the methane content in the gangue samples of different particle sizes can be measured using a methane content meter, that is, the first content information. By combining the production information of raw coal, the second content information of commercial coal, the first production information and the first content information of gangue, the methane emissions of the coal preparation plant within the target time can be determined.

[0067] As an optional implementation method, the production information includes raw coal production and commercial coal production, wherein the methane emissions are determined based on the production information, first production information, first content information and second content information, including: obtaining the production difference between the first production information and the raw coal production; and determining the methane emissions based on the production difference, commercial coal production, first content information and second content information.

[0068] In this embodiment, in the process of determining the methane emission based on the production information, the first production information, the first content information and the second content information, the production difference between the first production information and the raw coal production can be obtained; the methane emission can be determined based on the production difference, the commercial coal production, the first content information and the second content information. The production information includes the raw coal production and the commercial coal production.

[0069] Optionally, a belt weigher can be used to measure the daily raw coal output Y, commercial coal output S and gangue output G.

[0070] Alternatively, the daily methane emissions T within the emission boundary of the coal preparation plant can be calculated by the following formula:

[0071]

[0072] Among them, q i′ can represent the residual methane content of commercial coal of different particle sizes; Q′ i It can express the percentage of the mass of particles of different sizes in the total mass.

[0073] In an embodiment of the present invention, if it is to determine the methane emissions in a coal preparation plant, first proportion information represented by the proportion of raw coal at different particle sizes corresponding to the raw coal in the coal preparation plant in the total amount of raw coal, and second proportion information represented by the proportion of commercial coal at different particle sizes corresponding to the commercial coal in the coal preparation plant in the total amount of commercial coal can be obtained; based on the first proportion information, first content information represented by the methane content in the raw coal at the corresponding particle sizes of the raw coal at different particle sizes can be determined, and based on the second proportion information, second content information represented by the methane content in the commercial coal at the corresponding particle sizes of the commercial coal at different particle sizes can be determined; the output information corresponding to the raw coal and the commercial coal is respectively obtained, and based on at least the output information, the first content information and the second content information, the methane emissions of the coal preparation plant within the target time can be determined. In this embodiment, since the methane emissions in the coal preparation plant are closely related to the types of coal in the coal preparation plant (for example, raw coal and commercial coal), the particle sizes of the raw coal and commercial coal, and the methane contents in the raw coal and commercial coal at different particle sizes, the above method is used to accurately measure the methane emissions in the coal preparation plant based on the different particle size distributions of the raw coal and commercial coal in the coal preparation plant, thereby achieving the technical effect of improving the accuracy of determining the methane emissions in the coal preparation plant and solving the technical problem of low accuracy in determining the methane emissions in the coal preparation plant.

[0074] The technical solution of the embodiment of the present invention is illustrated below in conjunction with preferred implementation modes.

[0075] At present, methane is the second largest greenhouse gas after carbon dioxide. Its warming effect and potential are higher than those of carbon dioxide, and it has a significant impact on the global greenhouse effect. Methane fugitive emissions from coal mining and post-mining activities are the largest sources of methane emissions in China, accounting for about 40% of the total methane emissions. Among them, emissions from post-mining activities mainly refer to methane emissions generated by the slow release of gas remaining in coal during the process of coal sorting, storage, transportation and crushing before combustion. Coal preparation plants sort raw coal and crush the raw coal into product coal of different specifications. The main products are clean coal and lump coal, in addition to by-products such as medium coal and coal slime. Since methane gas exists in the coal body in free and adsorbed states, methane gas will continue to escape into the air under the action of pressure gradient and concentration gradient, and the process of processing and crushing raw coal in coal preparation plants will aggravate the escape of methane gas in raw coal into the atmosphere. Therefore, there is still a technical problem of low accuracy in determining methane emissions in coal preparation plants.

[0076] The embodiment of the present invention proposes a method for calculating methane emissions within the emission boundary of a coal preparation plant, which can provide a basis for methane emission reduction in a coal preparation plant by measuring the particle size distribution of raw coal, measuring the residual methane content of raw coal using a methane content meter, measuring the particle size distribution of commercial coal, measuring the residual methane content of various commercial coals using a methane content meter, measuring the output of raw coal and commercial coal, and measuring the output of gangue, and finally calculating the methane emissions within the emission boundary of the coal preparation plant. This achieves the technical effect of improving the accuracy of determining the methane emissions in a coal preparation plant, and solves the technical problem of low accuracy in determining the methane emissions in a coal preparation plant.

[0077] The embodiments of the present invention are further described below.

[0078] In an embodiment of the present invention, Figure 2 is a flow chart of a method for calculating methane emissions within an emission boundary range of a coal preparation plant according to an embodiment of the present invention. Figure 2 As shown, the method may include the following steps:

[0079] Step S201, obtaining the mass percentage of the full-scale particle size range.

[0080] In this embodiment, a certain area can be selected at the entrance of the raw coal bunker of the coal preparation plant, and coal bodies of all sizes in this area can be loaded into the sample container, and a total of 10 kg of coal samples can be selected. All sample particle sizes can be divided into n groups according to the particle size range, n can be greater than 5, and the particle size of each group can be r n , weigh each group and obtain the particle size r of each group n The weight w n , calculate the proportion of each group weight in the total weight Q(w n )=w n / 10*100%. Thus, the mass proportion of different particle sizes is fitted by a second-order polynomial to obtain the mass proportion of the full-scale particle size range. The mass proportion of the full-scale particle size range can be determined by the following formula:

[0081] Q r =ar 2 +br+c

[0082] Wherein, a, b and c may represent fitting parameters; and r may represent particle size.

[0083] Optionally, the raw coal sampling point can be the initial location where the raw coal is transported from the underground mine to the coal preparation plant, and the commercial coal sampling point can be before the commercial coal is loaded and transported away, so as to ensure accurate measurement of coal emissions within the coal preparation plant.

[0084] Step S202, determining the residual methane content of each particle size of the raw coal.

[0085] Optionally, a rapid methane content tester can be used to measure the residual methane content q of each particle size of the raw coal. n .

[0086] Step S203, calculating the residual content in the full-scale particle size range.

[0087] In this embodiment, the relationship between the coal particle size and the residual content can be established by the following formula:

[0088]

[0089] Among them, r can represent the particle size; q can represent the residual content; q0 can represent the methane content of the coal seam, which can be obtained from the coal seam geological report; D can represent the equivalent diffusion coefficient.

[0090] Optionally, based on the measured r n and q n The data is fitted according to the above to obtain the parameter D value. From this, the residual content calculation formula for the full-scale particle size range of this sampling can be obtained as follows:

[0091]

[0092] Step S204, calculating the percentage of the mass of particles of different sizes in the total mass.

[0093] In this embodiment, coal samples are selected at the outlet of the commercial bin of the coal preparation plant. Since the particle size of commercial coal is relatively uniform, m samples of different particle sizes are screened out according to the method in step S201 according to the commercial coal type m and weighed, and the percentage Q' of the mass of the different particle sizes in the total mass is calculated.

[0094] Step S205, determining the residual methane content of each particle size of the commercial coal.

[0095] In this embodiment, a methane content measuring instrument can be used to measure the residual methane content q' of each particle size of commercial coal. m .

[0096] Optionally, a rapid methane residual content measuring instrument is used to measure the residual methane content of coal samples of different particle sizes, which can accurately measure the residual methane content of the coal samples in a short time and avoid the escape of residual methane during the measurement process.

[0097] Step S206, measuring the daily raw coal output, commercial coal output and gangue output.

[0098] In this embodiment, a belt weigher can be used to measure the daily raw coal output Y, commercial coal output S and gangue output G.

[0099] Step S207, determining daily methane emissions.

[0100] In this embodiment, the daily methane emission T within the emission boundary of the coal preparation plant can be calculated by the following formula:

[0101]

[0102] Among them, q i ′ can represent the residual methane content of commercial coal of different particle sizes; Q i ' can represent the percentage of the mass of particles of different sizes in the total mass.

[0103] Optionally, the daily gangue production is measured and the influence of gangue is removed from the methane emission calculation to ensure accurate calculation of methane emissions from the coal preparation plant.

[0104] The following takes the daily methane emissions within the emission boundary of a coal preparation plant as an example to further illustrate the embodiment of the present invention.

[0105] Since the gas residual content of coal bodies with different particle sizes is different, coal samples are selected at the entrance of the raw coal bin of the coal preparation plant, and 5 sizes of 0-8mm, 8mm-15mm, 15mm-20mm, 20mm-25mm, and above 25mm can be screened out. After sorting, the samples of 5 different particle sizes are weighed, and the percentage Q of the mass of different particle sizes in the total mass can be calculated. Then, the particle size distribution can be described by the following formula through fitting of the second-order polynomial:

[0106] Q r =0.0219r 2 -0.1585r+0.039

[0107] Among them, r can represent the particle size.

[0108] Optionally, 200 g of coal sample of each particle size can be taken out, and the residual methane content of 5 particle sizes can be measured by CHW12 methane content meter, and the calculation formula of particle size and residual content can be fitted according to the residual content theoretical formula. The residual content of the full-scale particle size range of the sample can be determined by the following calculation formula:

[0109]

[0110] Optionally, the commercial coal of the coal preparation plant is mainly lump coal and clean coal, which can be divided into two categories. Coal samples can be selected and weighed at the exit of the commercial warehouse of the coal preparation plant. The particle size of the lump coal is in the range of 10mm-20mm. Among them, since the particle size of clean coal is small, particle size classification is not performed.

[0111] Optionally, after taking out 200 g of commercial coal sample of each particle size, a methane content meter can be used to measure the residual methane contents q′1 and q′2 of the two types of particle size sizes of the commercial coal.

[0112] Optionally, a belt weigher can be used to measure the daily raw coal output Y, the lump coal output S of commercial coal, and the clean coal output S′ of commercial coal.

[0113] Optionally, a belt weigher can be used to measure the daily gangue production G.

[0114] Alternatively, the daily methane emissions T within the emission boundary of the coal preparation plant can be determined by the following calculation formula:

[0115]

[0116] In an embodiment of the present invention, by measuring the particle size distribution of raw coal, measuring the residual methane content of raw coal using a methane content meter, measuring the particle size distribution of commercial coal, measuring the residual methane content of various types of commercial coal using a methane content meter, metering the output of raw coal and commercial coal, and metering the output of gangue, and finally calculating the methane emissions within the emission boundary of the coal preparation plant, a basis can be provided for methane emission reduction in the coal preparation plant, thereby achieving the technical effect of improving the accuracy of determining the methane emissions in the coal preparation plant, and solving the technical problem of low accuracy in determining the methane emissions in the coal preparation plant.

[0117] According to an embodiment of the present invention, a device for determining methane emissions in a coal preparation plant is also provided. It should be noted that the device for determining methane emissions in a coal preparation plant can be used to execute the method for determining methane emissions in a coal preparation plant in the above embodiment.

[0118] Figure 3 Schematic diagram of a device for determining methane emissions in a coal preparation plant according to an embodiment of the present invention. Figure 3 As shown, the device 300 for determining the methane emission in the coal preparation plant may include: an acquisition unit 302 , a first determination unit 304 and a second determination unit 306 .

[0119] The acquisition unit 302 is used to obtain the first proportion information corresponding to the raw coal in the coal preparation plant, and the second proportion information corresponding to the commercial coal in the coal preparation plant, wherein the first proportion information is used to indicate the proportion of raw coal with different particle sizes in the total amount of raw coal, and the second proportion information is used to indicate the proportion of commercial coal with different particle sizes in the total amount of commercial coal.

[0120] The first determination unit 304 is used to determine the first content information of the raw coal at different particle sizes based on the first proportion information, and to determine the second content information of the commercial coal at different particle sizes based on the second proportion information, wherein the first content information is used to indicate the methane content in the raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in the commercial coal at the corresponding particle size.

[0121] The second determination unit 306 is used to obtain the production information corresponding to the raw coal and the commercial coal respectively, and determine the methane emissions of the coal preparation plant within the target time based at least on the production information, the first content information and the second content information, wherein the production information is used to indicate the production of the raw coal and the commercial coal respectively within the target time.

[0122] In the embodiment of the present invention, the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant are obtained by the acquisition unit 302, wherein the first proportion information is used to indicate the proportion of the raw coal at different particle sizes in the total raw coal, and the second proportion information is used to indicate the proportion of the commercial coal at different particle sizes in the total commercial coal. The first content information of the raw coal at different particle sizes is determined by the first determination unit 304 based on the first proportion information, and the second content information of the commercial coal at different particle sizes is determined based on the second proportion information, wherein the first content information is used to indicate the methane content in the raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in the commercial coal at the corresponding particle size. The production information corresponding to the raw coal and the commercial coal is obtained by the second determination unit respectively, and the methane emission of the coal preparation plant within the target time length is determined based on at least the production information, the first content information and the second content information, wherein the production information is used to indicate the production of the raw coal and the commercial coal respectively within the target time length. Thus, the technical effect of improving the accuracy of determining the methane emission in the coal preparation plant is achieved, and the technical problem of accurately determining the methane emission in the coal preparation plant is solved.

[0123] According to another aspect of an embodiment of the present invention, an electronic device is also provided, which may include a memory and a processor, wherein a computer program is stored in the memory and the processor may be configured to run the computer program to execute a method for determining methane emissions in a coal preparation plant.

[0124] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided, which includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention.

[0125] According to another aspect of an embodiment of the present invention, a processor is provided, which is used to run a program, wherein when the program is run, the method for determining methane emissions in a coal preparation plant according to an embodiment of the present invention is executed.

[0126] According to another aspect of the present invention, a computer program product is provided, which includes a computer program, and when executed by a processor, the computer program implements the method for determining methane emissions in a coal preparation plant according to the embodiment of the present application.

[0127] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0128] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0129] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0130] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0131] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, Read-Only Memory (ROM), Random Access Memory (RAM), mobile hard disk, magnetic disk or optical disk, etc., various media that can store program codes.

[0132] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for determining methane emissions in a coal preparation plant, characterized in that: include: Obtaining first proportion information corresponding to raw coal in a coal preparation plant, and second proportion information corresponding to commercial coal in the coal preparation plant, wherein the first proportion information is used to indicate the proportion of the raw coal at different particle sizes in the total amount of raw coal, and the second proportion information is used to indicate the proportion of the commercial coal at different particle sizes in the total amount of commercial coal; Based on the first proportion information, determine the first content information of the raw coal at different particle sizes, and based on the second proportion information, determine the second content information of the commercial coal at different particle sizes, wherein the first content information is used to indicate the methane content in the raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in the commercial coal at the corresponding particle size; The production information corresponding to the raw coal and the commercial coal is obtained respectively, and the methane emissions of the coal preparation plant within the target time are determined based at least on the production information, the first content information and the second content information, wherein the production information is used to indicate the production amounts corresponding to the raw coal and the commercial coal respectively within the target time.

2. The method according to claim 1, characterized in that Before obtaining the first proportion information corresponding to the raw coal in the coal preparation plant and the second proportion information corresponding to the commercial coal in the coal preparation plant, the method further includes: Acquire multiple first particle size range information corresponding to the raw coal, and screen the raw coal according to the multiple first particle size range information to obtain the raw coal that meets different first particle size range information; Acquire multiple second particle size range information corresponding to the commercial coal, and screen the commercial coal according to the multiple second particle size range information to obtain the commercial coal that meets different second particle size range information, wherein the number of the first particle size range information is greater than the number of the second particle size range information.

3. The method according to claim 2, characterized in that Get the first proportion information corresponding to the raw coal in the coal preparation plant, including: Obtaining the total mass of the total amount of raw coal, and measuring the mass of the raw coal satisfying different first particle size range information; Determine the first proportion information based on the total mass of the total amount of raw coal and the masses corresponding to the first particle size range information of different types; Obtaining the second proportion information corresponding to the commercial coal in the coal preparation plant, including: obtaining the total mass of the total amount of the commercial coal, and measuring the mass of the commercial coal that meets different second particle size range information; determining the second proportion information based on the total mass of the total amount of the commercial coal and the mass corresponding to different second particle size range information.

4. The method according to claim 2, characterized in that: Determining first content information of the raw coal at different particle sizes based on the first proportion information includes: Acquire the methane content data in the raw coal under different first particle size range information; Based on the first proportion information, determining the mass proportion of the whole particle size range of the raw coal; The first content information is determined based on the methane content data and the mass percentage in the raw coal.

5. The method according to claim 2, characterized in that: Based on the second proportion information, determining the second content information of the commercial coal at different particle sizes includes: Obtaining methane content data in the commercial coal under different second particle size range information; Based on the second proportion information, determining the mass proportion of the whole particle size range of the commercial coal; The second content information is determined based on the methane content data in the commercial coal and the mass percentage.

6. The method according to claim 1, characterized in that The coal preparation plant includes gangue, and the method further comprises: Obtaining first production information corresponding to the gangue; Determining the methane emission of the coal preparation plant within a target time period based at least on the output information, the first content information, and the second content information, includes: The methane emission amount is determined based on the production information, the first production information, the first content information, and the second content information.

7. The method according to claim 6, characterized in that The production information includes raw coal production and commercial coal production, wherein the methane emission is determined based on the production information, the first production information, the first content information, and the second content information, including: Obtaining a yield difference between the first yield information and the raw coal yield; The methane emission is determined based on the output difference, the commercial coal output, the first content information, and the second content information.

8. A device for determining methane emissions in a coal preparation plant, characterized in that: include: An acquisition unit, used to acquire first proportion information corresponding to raw coal in a coal preparation plant, and second proportion information corresponding to commercial coal in the coal preparation plant, wherein the first proportion information is used to indicate the proportion of the raw coal at different particle sizes in the total amount of raw coal, and the second proportion information is used to indicate the proportion of the commercial coal at different particle sizes in the total amount of commercial coal; a first determining unit, configured to determine first content information of the raw coal at different particle sizes based on the first proportion information, and to determine second content information of the commercial coal at different particle sizes based on the second proportion information, wherein the first content information is used to indicate the methane content in the raw coal at the corresponding particle size, and the second content information is used to indicate the methane content in the commercial coal at the corresponding particle size; The second determination unit is used to obtain the production information corresponding to the raw coal and the commercial coal respectively, and determine the methane emissions of the coal preparation plant within the target time period based at least on the production information, the first content information and the second content information, wherein the production information is used to indicate the production of the raw coal and the commercial coal respectively within the target time period.

9. An electronic device, comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to execute the method for determining methane emissions in a coal preparation plant according to any one of claims 1 to 7.

10. A processor, characterized in that: The processor is used to run a program, wherein the program, when run by the processor, executes the method for determining methane emissions in a coal preparation plant as described in any one of claims 1 to 7.

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