Coal-electricity joint operation scheduling method, controller and system

Abstract

The invention relates to the technical field of coal-electricity joint operation, and discloses a coal-electricity joint operation scheduling method, controller and system.The method comprises the steps that a coal dressing instruction is generated according to set separation density and detection parameters of coal separation equipment, and the coal dressing instruction is sent to a coal dressing system; the coal preparation system adjusts the separation density of coal separation equipment according to the coal preparation instruction, and coal products with different separation densities are obtained; determining heat values of the different coal products according to the separation densities of the different coal products; generating a coal blending instruction according to the heat values of the different coal products and a preset target heat value, and sending the coal blending instruction to an electric field coal blending system, so that the electric field coal blending system adjusts the conveying amount of the coal products with the different heat values according to the coal blending instruction to obtain mixed coal with the target heat value. According to the invention, blending of coals with different heat values is realized through selecting-blending-adjusting linkage of coal-electricity joint operation, and the problem of coal-furnace mismatching is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of coal-electricity joint operation, and in particular to a coal-electricity joint operation scheduling method, controller and system. Background Art

[0002] Coal blending technology involves combining different types of raw coal in appropriate proportions to optimize the fuel's calorific value and the type of furnace. In the broader field of power generation, due to factors such as limited coal sources and price fluctuations, power companies have long faced the dilemma of fuel-furnace mismatch, severely impacting the safety, economic, and environmental performance of power plants. To address this, existing power plants widely utilize coal blending technology to alleviate this fuel-furnace mismatch. However, due to the variability of coal sources and the limited availability of coal types, actual coal blending often fails to meet expectations, and the coal-furnace mismatch problem remains unresolved. Summary of the Invention

[0003] In view of this, the present invention provides a coal-electricity joint operation scheduling method, controller and system to solve the technical problem that the coal-furnace mismatch problem cannot be effectively solved.

[0004] In a first aspect, the present invention provides a coal-electricity joint operation scheduling method, comprising: generating a coal sorting instruction according to a set sorting density and detection parameters of a coal sorting device, and sending the coal sorting instruction to a coal sorting system so that the coal sorting system adjusts the sorting density of the coal sorting device according to the coal sorting instruction to obtain coal products with different sorting densities; determining the calorific value of different coal products according to the sorting density of different coal products; generating a coal blending instruction according to the calorific value of different coal products and a preset target calorific value, and sending the coal blending instruction to an electric field coal blending system so that the electric field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instruction to obtain mixed coal with a target calorific value.

[0005] The coal-electricity joint operation scheduling method of the present invention generates a coal preparation instruction according to the set sorting density and the detection parameters of the coal sorting equipment, and sends the coal preparation instruction to the coal preparation system so that the coal preparation system adjusts the sorting density of the coal sorting equipment according to the coal preparation instruction to obtain coal products with different sorting densities, determines the calorific value of different coal products according to the sorting density of different coal products, generates a coal blending instruction according to the calorific value of different coal products and a preset target calorific value, and sends the coal blending instruction to the electric field coal blending system so that the electric field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instruction to obtain mixed coal with target calorific value. The present invention realizes the blending of coal with different calorific values through the selection-blend-adjustment linkage of the coal-electricity joint operation. The power plant staff can accurately match the mixed coal with target calorific value according to the furnace type, effectively solving the problem of coal-furnace mismatch, and helping the power plant to flexibly adjust the coal usage according to actual needs, thereby improving power generation efficiency, economic benefits and environmental protection level.

[0006] Optionally, the detection parameters include the actual sorting density and actual bucket position of the coal sorting bucket in the coal sorting equipment; correspondingly, generating coal sorting instructions based on the set sorting density and the detection parameters of the coal sorting equipment includes: comparing the actual sorting density and the set sorting density; generating coal sorting instructions based on the comparison result and the actual bucket position, wherein the coal sorting instructions are used to control the opening state of the diverter valve, water supply valve and medium addition valve of the coal sorting equipment, so that the actual sorting density is equal to the set sorting density and the actual bucket position is in the preset bucket position range.

[0007] In this method, by comparing the actual sorting density with the set sorting density and generating coal sorting instructions based on the actual bucket position, dynamic adjustment of the coal sorting process is achieved, which can promptly correct deviations in the sorting density and ensure the stability and accuracy of the sorting density. At the same time, the bucket position is maintained within the preset bucket position range, thereby improving the stability and reliability of the sorting process.

[0008] Optionally, the generating of coal sorting instructions based on the comparison result and the actual bucket position includes: when the comparison result is that the actual sorting density is lower than the set sorting density, if the actual bucket position is in the preset bucket position interval, generating the coal sorting instruction to open the diverter valve or the media addition valve; if the actual bucket level is lower than the minimum value of the preset bucket level interval, generating the coal sorting instruction to simultaneously open the water supply valve and the media addition valve; if the actual bucket level is higher than the maximum value of the preset bucket level interval, generating the coal sorting instruction to first open the diverter valve and then open the media addition valve; when the comparison result is that the actual sorting density is higher than the set sorting density, if the actual bucket level is in the preset bucket level interval, generating the coal sorting instruction to open the water supply valve; if the actual bucket level is higher than the maximum value of the preset bucket level interval, generating the coal sorting instruction to open the water supply valve and release the bucket; if the actual bucket level is lower than the minimum value of the preset bucket level interval, generating the coal sorting instruction to open the water supply valve.

[0009] In this method, different coal cleaning instruction generation strategies are formulated for different situations where the actual sorting density is higher or lower than the set sorting density, and where the actual bucket position is in different ranges. This method can more accurately adjust the opening status of the diverter valve, water supply valve and media addition valve, so that the sorting density and bucket position can quickly reach the set requirements, reducing adjustment time and resource waste.

[0010] Optionally, generating coal blending instructions based on the calorific values of different coal products and preset target calorific values includes: inputting the calorific values of different coal products and preset target calorific values into a blending mathematical model; solving the blending mathematical model to obtain the delivery amounts of different coal products; and generating the coal blending instructions based on the delivery amounts of different coal products.

[0011] In this way, by solving the mathematical model, the delivery volume of different coal products can be optimized and allocated, so that coal resources can be used more rationally. At the same time, the errors caused by human experience and subjective judgment are reduced, the automation and intelligence level of the coal blending process is improved, and the labor intensity and the risk of human error are reduced.

[0012] Optionally, the blending mathematical model is:

[0013]

[0014] Among them, Q target is the target calorific value, W i is the transport volume of the i-th type of coal, Q i is the calorific value of the i-th type of coal, and n is the total number of coal types.

[0015] In this method, you only need to input the calorific value and target calorific value of different coal products to obtain the delivery volume of each coal product, which improves the coal blending efficiency and also makes it easier to monitor and adjust the coal blending process.

[0016] Optionally, determining the calorific value of different coal products according to the sorting density of different coal products includes: obtaining a correspondence between sorting density and calorific value; and searching for the calorific value of a corresponding coal product from the correspondence according to the sorting density of different coal products.

[0017] In this method, based on the correspondence between sorting density and calorific value, the calorific value of different coal products can be determined more accurately. Compared with the method of calculating the calorific value by raw coal with different proportions, there is no need to monitor the source and calorific value parameters of each raw coal, which saves time and cost and improves work efficiency.

[0018] Optionally, after obtaining the mixed coal of target calorific value, the method further includes: controlling the catalyst system of the power plant to spray catalyst onto the mixed coal on the conveying belt entering the furnace.

[0019] In this method, by controlling the catalyst system of the power plant to spray catalyst onto the mixed coal on the conveyor belt entering the furnace, the combustion reaction of the coal can be promoted, the combustion efficiency can be improved, and thus the power generation efficiency of the power plant can be improved.

[0020] In a second aspect, the present invention provides a controller for executing the coal-electricity joint operation scheduling method as described in any one of the first aspects of the present invention.

[0021] In a third aspect, the present invention provides a coal-electricity joint operation dispatching system, comprising: a controller as in the second aspect of the present invention; a coal preparation system connected to the controller, for adjusting the sorting density of the coal sorting equipment according to coal preparation instructions to obtain coal products with different sorting densities; and an electric field coal blending system connected to the controller, for adjusting the delivery volume of coal products with different calorific values according to the coal blending instructions to obtain mixed coal with a target calorific value.

[0022] Optionally, the coal-electricity joint operation dispatching system further includes: a power plant catalyst system, connected to the controller, for spraying catalyst onto the mixed coal on the furnace conveyor belt according to a spraying instruction sent by the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of a coal-electricity joint operation dispatching system according to an embodiment of the present invention;

[0025] Figure 2 1 is a schematic structural diagram of another coal-electricity joint operation dispatching system according to an embodiment of the present invention;

[0026] Figure 3 It is a flow chart of the coal-electricity joint operation scheduling method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0028] Coal-fired power generation is a major initiative aimed at optimizing resource allocation in the coal-fired power industry, improving energy security, and promoting high-quality development. Currently, power plants widely utilize coal blending technology to alleviate the incompatibility between fuel and furnace type. However, due to the variable and limited coal sources available to power plants, actual coal blending often fails to meet expectations. Furthermore, the construction of separate coal blending plants not only increases investment and operating costs but also presents new challenges in fuel management and other processes. Furthermore, thermal power companies shoulder the daunting task of absorbing renewable energy. Consequently, operating coal-fired power plants at low or ultra-low loads has become almost the norm, significantly reducing coal conversion efficiency.

[0029] In view of this, the embodiments of the present invention propose a coal-fired power joint operation scheduling method, controller and system, which can realize the selection-matching-adjustment linkage of the coal-fired power joint operation, and deeply solve the common problems of coal-furnace mismatch and low coal conversion efficiency, thereby improving the economic effect, power generation efficiency and environmental protection level of the entire coal power generation industry chain.

[0030] The embodiment of the present invention proposes a coal-electricity joint operation dispatching system, such as Figure 1 Shown, including:

[0031] A controller is configured to generate coal separation instructions based on a set separation density and detection parameters of the coal separation equipment, determine the calorific value of different coal products based on their separation density, generate coal blending instructions based on the calorific value of different coal products and a preset target calorific value, send the coal separation instructions to the coal separation system, and send the coal blending instructions to the electric field coal blending system;

[0032] The coal separation system is connected to the controller and is used to adjust the separation density of the coal separation equipment according to the coal separation instructions to obtain coal products with different separation densities;

[0033] The electric field coal blending system is connected to the controller and is used to adjust the delivery rate of coal products with different calorific values according to the coal blending instructions to obtain mixed coal with the target calorific value.

[0034] Specifically, the controller may be a central processing unit, a network processor, or a combination thereof. The controller may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0035] A density sensor is installed on the coal separation barrel of the coal separation equipment. The controller is connected to the density sensor to obtain the actual separation density of the coal separation barrel through the density sensor.

[0036] The coal preparation system is respectively connected to the diverter valve, water supply valve and medium addition valve of the coal sorting equipment. By adjusting the diverter valve, water supply valve and medium addition valve of the coal sorting equipment, the sorting density is changed and coal products with different calorific values are selected.

[0037] Furthermore, if Figure 2 As shown, the coal sorting equipment's combined barrel is equipped with a liquid level sensor. A controller connected to the density sensor uses the liquid level sensor to determine the actual level of the combined barrel. The controller generates coal separation instructions that control the coal separation system, adjusting the separation density while maintaining the combined barrel level within a reasonable preset range.

[0038] There is a corresponding relationship between the sorting density and the calorific value of the coal product. When the sorting density decreases, the calorific value of the coal product increases, and when the sorting density increases, the calorific value of the coal product decreases. Therefore, the embodiment of the present invention can calculate the corresponding calorific value according to the sorting density. Compared with the existing method of different calorific values for different raw coals, the method of the present application is more flexible, does not require detailed management of the source and parameters of the raw coal, reduces management costs, and can solve the problem of poor coal blending effect caused by variable coal sources and limited coal types.

[0039] Coal products with different calorific values are transported through different conveyor belts. The coal blending instructions include the conveying capacity, conveying time and conveying speed of different conveyor belts. The electric field coal blending system adjusts the conveying capacity of the conveyor belts of coal products with different calorific values based on the coal blending instructions to achieve the blending of coals with different calorific values.

[0040] The coal-electricity joint operation dispatching system of the embodiment of the present invention generates a coal preparation instruction according to the set sorting density and the detection parameters of the coal sorting equipment through the controller, and sends the coal preparation instruction to the coal preparation system so that the coal preparation system adjusts the sorting density of the coal sorting equipment according to the coal preparation instruction to obtain coal products with different sorting densities, determines the calorific value of different coal products according to the sorting density of different coal products, generates a coal blending instruction according to the calorific value of different coal products and a preset target calorific value, and sends the coal blending instruction to the power field coal blending system so that the power field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instruction to obtain mixed coal with target calorific value. The present invention realizes the blending of coal with different calorific values through the selection-blend-adjustment linkage of the coal-electricity joint operation. The power plant staff can accurately match the mixed coal with target calorific value according to the furnace type, effectively solving the problem of coal-furnace mismatch, and helping the power plant to flexibly adjust the coal usage according to actual needs, thereby improving power generation efficiency, economic benefits and environmental protection level.

[0041] Furthermore, the coal-electricity joint operation dispatching system also includes:

[0042] The power plant catalyst system is connected to the controller and is used to spray catalyst onto the mixed coal on the furnace conveyor belt according to the spraying instructions sent by the controller.

[0043] By controlling the catalyst system of the power plant to spray catalyst onto the mixed coal on the conveyor belt entering the furnace, the combustion reaction of the coal can be promoted, the combustion efficiency can be improved, and thus the power generation efficiency of the power plant can be improved.

[0044] Based on the above-mentioned coal-electricity joint operation scheduling system, an embodiment of the present invention also provides a corresponding coal-electricity joint operation scheduling method. 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 here.

[0045] In this embodiment, a coal-electricity joint operation scheduling method is provided, which can be used in a controller such as Figure 3 As shown, the process includes the following steps:

[0046] Step S301: Generate coal sorting instructions according to the set sorting density and detection parameters of the coal sorting equipment, and send the coal sorting instructions to the coal sorting system so that the coal sorting system adjusts the sorting density of the coal sorting equipment according to the coal sorting instructions to obtain coal products with different sorting densities.

[0047] Specifically, the detection parameters include the actual sorting density of the coal sorting barrel in the coal sorting equipment.

[0048] The coal sorting instructions adjust the switches of the coal sorting equipment such as the diverter valve, water supply valve and medium addition valve, thereby changing the sorting density and selecting coal products with different calorific values; when the sorting density decreases, the calorific value of the coal product increases, and when the sorting density increases, the calorific value of the coal product decreases.

[0049] For example, when the actual sorting density is lower than the set sorting density, the coal sorting instructions include increasing the opening of the diverter valve to increase the sorting density; when the actual sorting density is higher than the set sorting density, opening the water supply valve to supply water to reduce the sorting density.

[0050] Step S302: determining the calorific value of different coal products according to the sorting density of different coal products.

[0051] Specifically, the present invention has found that there is a corresponding relationship between the sorting density and the calorific value of coal products. The greater the sorting density, the greater the calorific value. Based on this, the corresponding relationship between calorific value and sorting density is established in advance and stored in the database. After obtaining the sorting density, the calorific value of the coal product is determined according to the sorting density.

[0052] Step S303: Generate coal blending instructions based on the calorific values of different coal products and the preset target calorific value, and send the coal blending instructions to the electric field coal blending system so that the electric field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instructions to obtain mixed coal with the target calorific value.

[0053] Specifically, the coal blending instructions include the delivery volume of coal products of various calorific values. The power plant coal blending system adjusts the delivery volume of the coal product conveyor belts with different calorific values based on the coal blending instructions, realizes the blending of coals with different calorific values, obtains mixed coal with the target calorific value, and achieves precise blending.

[0054] The coal-electricity joint operation scheduling method of the embodiment of the present invention generates a coal preparation instruction according to the set sorting density and the detection parameters of the coal sorting equipment, and sends the coal preparation instruction to the coal preparation system so that the coal preparation system adjusts the sorting density of the coal sorting equipment according to the coal preparation instruction to obtain coal products with different sorting densities, determines the calorific value of different coal products according to the sorting density of different coal products, generates a coal blending instruction according to the calorific value of different coal products and a preset target calorific value, and sends the coal blending instruction to the power field coal blending system so that the power field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instruction to obtain mixed coal with target calorific value. The present invention realizes the blending of coal with different calorific values through the selection-blend-adjustment linkage of the coal-electricity joint operation. Power plant staff can accurately match the mixed coal with target calorific value according to the furnace type, effectively solving the problem of coal-furnace mismatch, and helping power plants to flexibly adjust coal usage according to actual needs, thereby improving power generation efficiency, economic benefits and environmental protection levels.

[0055] In some embodiments, the detection parameters include the actual sorting density and the actual bucket position of the coal sorting bucket in the coal sorting equipment;

[0056] Correspondingly, step S301 generates coal sorting instructions according to the set sorting density and detection parameters of the coal sorting equipment, including:

[0057] Step S3011, comparing the actual sorting density with the set sorting density;

[0058] Step S3012: Generate a coal sorting instruction based on the comparison result and the actual bucket position, wherein the coal sorting instruction is used to control the opening state of the diverter valve, water supply valve and medium addition valve of the coal sorting equipment so that the actual sorting density is equal to the set sorting density and the actual bucket position is within the preset bucket position range.

[0059] Specifically, the actual sorting density and the actual barrel level are collected by a density sensor and a liquid level sensor respectively arranged on the combined barrel.

[0060] The comparison results include three types: the actual sorting density is greater than the set sorting density, the actual sorting density is less than the set sorting density, and the actual sorting density is equal to the set sorting density.

[0061] Under different comparison results, corresponding coal preparation instructions are generated.

[0062] By comparing the actual sorting density with the set sorting density and generating coal sorting instructions based on the actual bucket position, dynamic adjustment of the coal sorting process is achieved, which can promptly correct deviations in the sorting density and ensure the stability and accuracy of the sorting density. At the same time, the bucket position is maintained within the preset bucket position range, thereby improving the stability and reliability of the sorting process.

[0063] In some embodiments, step S3012, generating a coal sorting instruction based on the comparison result and the actual bucket position, includes:

[0064] Step S30121: When the comparison result shows that the actual sorting density is lower than the set sorting density, if the actual bucket level is within the preset bucket level range, a coal sorting instruction is generated to open the diverter valve or the media addition valve. If the actual bucket level is lower than the minimum value of the preset bucket level range, a coal sorting instruction is generated to simultaneously open the water supply valve and the media addition valve. If the actual bucket level is higher than the maximum value of the preset bucket level range, a coal sorting instruction is generated to first open the diverter valve and then open the media addition valve.

[0065] Step S30122, when the comparison result is that the actual sorting density is higher than the set sorting density, if the actual bucket position is in the preset bucket position range, a coal sorting instruction to open the water supply valve is generated; if the actual bucket position is higher than the maximum value of the preset bucket position range, a coal sorting instruction to open the water supply valve and release the bucket is generated; if the actual bucket position is lower than the minimum value of the preset bucket position range, a coal sorting instruction to open the water supply valve is generated.

[0066] For example, the maximum value of the preset bucket interval is A, and the minimum value is B.

[0067] The process of adjusting the sorting density includes:

[0068] When the actual sorting density is lower than the set sorting density, if the actual barrel level is within the range of AB, increasing the diverter valve opening can increase the density. When the diverter causes the actual barrel level to approach A, and the sorting density still does not reach the set sorting density, it is necessary to stop the diverter, open the medium adding valve, and add medium; when the actual barrel level is lower than A, it is necessary to open the water supply valve and the medium adding valve to increase the actual barrel level and the sorting density; when the actual barrel level is higher than B, it is necessary to open the diverter valve to increase the sorting density. When the diverter valve is opened and the actual barrel level is close to A, and the sorting density still does not reach the set sorting density, it is necessary to stop the diverter, open the medium adding valve, and add medium.

[0069] When the actual sorting density is lower than the set sorting density, the bucket position is within the range of AB, open the water supply valve to add water and reduce the density; if water is added until the actual bucket position ≥ B, the sorting density has not dropped to the set sorting density, then the bucket needs to be placed; when the actual bucket position is lower than A, open the water supply valve to add water. If water is added until the actual bucket position ≥ B, the sorting density has not dropped to the set sorting density, then the bucket needs to be placed; when the actual bucket position is higher than B, open the water supply valve to add water and place the bucket.

[0070] When the sorting density is equal to the set sorting density, close the diverter valve, water supply valve and medium adding valve to keep the combined medium barrel within the AB range. The heavy medium sorting effect will not be affected within the AB range.

[0071] In this method, specific coal cleaning instruction generation strategies are formulated for different situations where the actual sorting density is higher or lower than the set sorting density, and where the actual bucket position is in different ranges. This method can more accurately adjust the opening status of the diverter valve, water supply valve and media addition valve, so that the sorting density and bucket position can quickly reach the set requirements, reducing adjustment time and resource waste.

[0072] In some embodiments, step S303, generating coal blending instructions based on the calorific values of different coal products and a preset target calorific value, includes:

[0073] Step S3031: inputting the calorific value of different coal products and the preset target calorific value into the blending mathematical model.

[0074] Step S3032: Solve the blending mathematical model to obtain the delivery rate of different coal products.

[0075] Specifically, the blending mathematical model is:

[0076]

[0077] Among them, Q target is the target calorific value, in MJ / kg or kcal / kg, W i is the transport capacity of the i-th type of coal, in tons / hour, Q i is the calorific value of the i-th type of coal, in MJ / kg or kcal / kg, and n is the total number of coal types.

[0078] By utilizing this blending mathematical model, the delivery rate of each coal product can be obtained by simply inputting the calorific value and target calorific value of different coal products, thereby improving the coal blending efficiency and facilitating the monitoring and adjustment of the coal blending process.

[0079] Step S3033: Generate coal blending instructions based on the delivery volume of different coal products.

[0080] Specifically, the coal blending instructions include the conveying capacity of the conveyor belts of coal products with different calorific values. After receiving the coal blending instructions, the power plant coal blending system adjusts the conveying capacity of the conveyor belts of coal products with different calorific values according to the coal blending instructions, thereby realizing the joint scheduling of coal selection, coal blending and conveying capacity adjustment.

[0081] In this way, by solving the mathematical model, the delivery volume of different coal products can be optimized and allocated, so that coal resources can be used more rationally. At the same time, the errors caused by human experience and subjective judgment are reduced, the automation and intelligence level of the coal blending process is improved, and the labor intensity and the risk of human error are reduced.

[0082] In some embodiments, step S302, determining the calorific value of different coal products according to the sorting density of different coal products, includes:

[0083] Step S3021, obtaining the corresponding relationship between sorting density and calorific value.

[0084] Step S3022: searching the calorific value of the corresponding coal product from the corresponding relationship according to the sorting density of different coal products.

[0085] Specifically, there is a corresponding relationship between sorting density and the calorific value of coal products. Therefore, the sorting density and the calorific value of coal products are pre-calibrated to obtain a corresponding relationship between sorting density and calorific value. Once this relationship is obtained, the corresponding calorific value can be calculated based on the sorting density. Compared with the existing method of assigning different calorific values to different raw coals, the method of this application is more flexible, eliminating the need for detailed management of raw coal sources and parameters, reducing management costs, and can solve the problem of poor coal blending results caused by variable coal sources and limited coal types.

[0086] The embodiments of the present invention, based on the correspondence between sorting density and calorific value, can more accurately determine the calorific value of different coal products. Compared with the method of calculating the calorific value by using raw coal of different proportions, there is no need to monitor the source and calorific value parameters of each raw coal, which saves time and cost and improves work efficiency.

[0087] In some embodiments, after obtaining the mixed coal with a target calorific value in step S303, the method further includes:

[0088] Step S304: Control the catalyst system of the power plant to spray catalyst onto the mixed coal on the conveyor belt entering the furnace.

[0089] By controlling the catalyst system of the power plant to spray catalyst onto the mixed coal on the conveyor belt entering the furnace, the combustion reaction of the coal can be promoted, the combustion efficiency can be improved, and thus the power generation efficiency of the power plant can be improved.

[0090] An embodiment of the present invention further provides a controller, which is used to execute the coal-electricity joint operation scheduling method of any one of the above embodiments.

[0091] The controller may be a central processing unit, a network processor, or a combination thereof. The controller may further include a hardware chip. The hardware chip may be an application-specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic, or any combination thereof.

[0092] A portion of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the form in which the computer program instruction exists in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc. Accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium that can be accessed by the computer.

[0093] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope of protection.

Claims

1. A coal-electricity joint operation scheduling method, characterized in that: include: generating a coal separation instruction according to the set separation density and the detection parameters of the coal separation equipment, and sending the coal separation instruction to the coal separation system so that the coal separation system adjusts the separation density of the coal separation equipment according to the coal separation instruction to obtain coal products with different separation densities; Determine the calorific value of different coal products based on their sorting density; Coal blending instructions are generated based on the calorific values of different coal products and the pre-set target calorific value, and the coal blending instructions are sent to the electric field coal blending system so that the electric field coal blending system adjusts the delivery amount of coal products with different calorific values according to the coal blending instructions to obtain mixed coal with the target calorific value.

2. The coal-electricity joint operation scheduling method according to claim 1, characterized in that: The detection parameters include the actual sorting density and actual bucket position of the coal sorting bucket in the coal sorting equipment; Correspondingly, the generation of coal sorting instructions according to the set sorting density and the detection parameters of the coal sorting equipment includes: Comparing the actual sorting density with the set sorting density; A coal sorting instruction is generated based on the comparison result and the actual bucket position, wherein the coal sorting instruction is used to control the opening state of the diverter valve, water supply valve and medium addition valve of the coal sorting equipment so that the actual sorting density is equal to the set sorting density and the actual bucket position is within the preset bucket position range.

3. The coal-electricity joint operation scheduling method according to claim 2, characterized in that: The generating of the coal separation instruction based on the comparison result and the actual bucket position includes: When the comparison result shows that the actual sorting density is lower than the set sorting density, if the actual bucket level is within the preset bucket level range, the coal sorting instruction to open the diverter valve or the media addition valve is generated; if the actual bucket level is lower than the minimum value of the preset bucket level range, the coal sorting instruction to simultaneously open the water supply valve and the media addition valve is generated; if the actual bucket level is higher than the maximum value of the preset bucket level range, the coal sorting instruction to first open the diverter valve and then open the media addition valve is generated; When the comparison result is that the actual sorting density is higher than the set sorting density, if the actual bucket level is in the preset bucket level range, the coal sorting instruction to open the water supply valve is generated; if the actual bucket level is higher than the maximum value of the preset bucket level range, the coal sorting instruction to open the water supply valve and release the bucket is generated; if the actual bucket level is lower than the minimum value of the preset bucket level range, the coal sorting instruction to open the water supply valve is generated.

4. The coal-electricity joint operation scheduling method according to claim 1, characterized in that: The generating of coal blending instructions according to the calorific values of different coal products and the preset target calorific values includes: Input the calorific value of different coal products and the pre-set target calorific value into the blending mathematical model; Solving the blending mathematical model to obtain the delivery rates of different coal products; The coal blending instructions are generated according to the delivery quantities of different coal products.

5. The coal-electricity joint operation scheduling method according to claim 4, characterized in that: The blending mathematical model is: Among them, Q target is the target calorific value, W i is the transport volume of the i-th type of coal, Q i is the calorific value of the i-th type of coal, and n is the total number of coal types.

6. The coal-electricity joint operation scheduling method according to claim 1, characterized in that: The determining of the calorific value of different coal products according to the sorting density of different coal products includes: Obtain the corresponding relationship between sorting density and calorific value; According to the sorting density of different coal products, the calorific value of the corresponding coal product is found from the corresponding relationship.

7. The coal-electricity joint operation scheduling method according to claim 1, characterized in that: After obtaining the mixed coal with the target calorific value, it also includes: Control the power plant catalyst system to spray catalyst onto the mixed coal on the conveyor belt entering the furnace.

8. A controller, characterized in that: The controller is used to execute the coal-electricity joint operation scheduling method according to any one of claims 1 to 7.

9. A coal-electricity joint operation dispatching system, characterized in that: include: The controller according to claim 8; A coal separation system connected to the controller, configured to adjust the separation density of the coal separation equipment according to the coal separation instructions to obtain coal products with different separation densities; The electric field coal blending system is connected to the controller and is used to adjust the delivery amount of coal products with different calorific values according to the coal blending instructions to obtain mixed coal with target calorific value.

10. The coal-electricity joint operation dispatching system according to claim 9, characterized in that: The coal-fired power joint operation dispatching system also includes: The power plant catalyst system is connected to the controller and is used to spray catalyst onto the mixed coal on the furnace conveyor belt according to the spraying instruction sent by the controller.

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