Power generation boiler as-fired coal blending method, calculation system, storage medium and equipment

Abstract

The invention provides a power generation boiler as-fired coal blending method, a calculation system, a storage medium and equipment, in use, the minimum total heat required to be provided by as-fired coal in a unit period is calculated and obtained through the power generation amount required by production in the unit period and the power generation efficiency of a power generation boiler unit, and the minimum total heat required to be provided by the as-fired coal in the unit period is calculated and obtained according to the use data of the three kinds of as-fired coal. And establishing an equation set by combining the minimum total heat required to be provided by the coal as fired in the unit period, so as to obtain the blending amount of each coal as fired when the minimum total heat required to be provided by the coal as fired in the unit period is combined and the coal as fired cost is the minimum value, and obtaining the blending amount of the coal as fired under the guidance of the obtained blending amount of the coal as fired. And the coal as fired blending of the power generation boiler is adjusted, so that the cost of the coal as fired is controlled in each unit period. The technical problems that in the prior art, as a fixed as-fired coal blending scheme is adopted, as-fired coal and power generation cost are not controlled, industrial cost is increased or production is unstable are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of boiler fuels, and particularly relates to a method for blending pulverized coal for a power generation boiler, a calculation system, a storage medium, and a device. Background Art

[0002] A power generation boiler is a commonly used energy device in industry, and is often used in a cogeneration system to provide continuous electric energy and heat energy for industrial production, playing an important guarantee role in industrial production. During the operation of a power generation boiler, coal is the most common fuel.

[0003] The pulverized coal fed into a power generation boiler for combustion is called pulverized coal for furnace entry. In the use of a power generation boiler, in order to reduce costs and pollution, generally three different types of pulverized coal for furnace entry are blended and burned.

[0004] However, due to the fact that the price of coal is affected by various factors such as the international political situation, supply and demand relationship, mining cost, and transportation, its price fluctuates frequently and greatly, bringing a great cost impact to industrial production. Especially for power generation boilers, in the general environment of fluctuating coal prices, the existing technology adopts a fixed blending scheme for pulverized coal for furnace entry, resulting in the problem that the pulverized coal for furnace entry and the power generation cost are out of control, causing an increase in industrial costs or unstable production. Summary of the Invention

[0005] In order to solve the technical problem in the background art that in the general environment of fluctuating coal prices, the existing technology still adopts a fixed blending scheme for pulverized coal for furnace entry, resulting in the problem that the pulverized coal for furnace entry and the power generation cost are out of control, causing an increase in industrial costs or unstable production, the present invention provides a method for blending pulverized coal for furnace entry, a calculation system, a storage medium, and a device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a method for blending pulverized coal for a power generation boiler, and the method for blending pulverized coal for a power generation boiler includes:

[0008] S1: Obtain the generated electricity required for production demand within a unit cycle and the power generation efficiency of a power generation boiler unit as first data;

[0009] S2: Calculate the minimum total heat of the pulverized coal for furnace entry required within the unit cycle according to the first data;

[0010] S3: Respectively obtain the usage data of three types of pulverized coal for furnace entry as second data;

[0011] S4: Calculate the blending amounts of the three types of pulverized coal for furnace entry when the pulverized coal for furnace entry cost within the unit cycle is at a minimum according to the second data and the minimum total heat of the pulverized coal for furnace entry required;

[0012] S5: Adjust the coal fed into the power generation boiler according to the blending ratios of the three types of coal fed into the furnace.

[0013] Optionally, among the first data, the power generation efficiency of the power generation boiler unit includes: the efficiency of the power generation boiler, the efficiency η2 of the steam turbine, and the efficiency η3 of the generator.

[0014] Optionally, in step S2, the process of calculating the minimum total heat of the coal fed into the furnace required in this unit cycle according to the first data is as follows:

[0015]

[0016] where E is the power generation amount required for production in this unit cycle, unit: KWh; Q min is the minimum total heat of the coal fed into the furnace required in this unit cycle, unit: kcal.

[0017] Optionally, in step S3, the second data includes: the stocks A, B, and C of each type of coal fed into the furnace obtained respectively; the unit cost data of each type of coal fed into the furnace: P A 、P B 、P C ; the unit heat data of each type of coal fed into the furnace: Q A 、Q B 、Q C .

[0018] Optionally, the cost data includes the purchase and transportation unit prices of each type of coal fed into the furnace;

[0019] The unit heat data of each type of coal fed into the furnace is obtained according to its coal properties.

[0020] Optionally, the cost data also includes the unit coal breaking cost and unit coal feeding cost for each type of coal fed into the furnace.

[0021] Optionally, in step S4, the equations for calculating the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace in this unit cycle is at the minimum value are as follows:

[0022] Q min ≤aQ A +bQ B +cQ C

[0023] P=aP A +bP B +cP C

[0024] a≤A,b≤B,c≤C

[0025] where a, b, and c are respectively the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace in this unit cycle is at the minimum value, unit: ton.

[0026] In a second aspect, the present invention further provides a calculation system for blending pulverized coal into a power generation boiler. The calculation system for blending pulverized coal into a power generation boiler includes:

[0027] A data acquisition unit, configured to acquire the generated electricity amount required for production demand within a unit period and the power generation efficiency of the power generation boiler unit as first data; and respectively acquire the usage data of three types of pulverized coal entering the furnace as second data;

[0028] A calculation unit, configured to calculate the minimum total heat of the pulverized coal required within the unit period according to the first data; and calculate the blending amounts of the three types of pulverized coal entering the furnace when the pulverized coal cost within the unit period is at a minimum according to the second data and the minimum total heat of the pulverized coal required;

[0029] An output unit, which outputs the blending amounts of the three types of pulverized coal entering the furnace.

[0030] In a third aspect, the present invention further provides a storage medium, in which instructions are stored, and the instructions are generated based on any one of the above-mentioned pulverized coal blending methods for a power generation boiler.

[0031] In a fourth aspect, the present invention further provides a pulverized coal blending device for a power generation boiler. The pulverized coal blending device for a power generation boiler includes a storage component, a processing component, and a regulation component;

[0032] Instructions are stored in the storage component, and the instructions are generated based on any one of the above-mentioned pulverized coal blending methods for a power generation boiler;

[0033] The processing component calls the instructions and outputs the blending amounts of the three types of pulverized coal entering the furnace;

[0034] The regulation component performs a blending operation on the pulverized coal entering the furnace based on the blending amounts of the three types of pulverized coal entering the furnace.

[0035] The beneficial effects of the present invention are:

[0036] The present invention provides a method for blending coal fed into a power generation boiler. During use, based on the power generation amount required for production in a unit cycle and the power generation efficiency of the power generation boiler unit, the minimum total heat that the coal fed into the furnace needs to provide within this unit cycle is calculated and obtained. According to the usage data of three types of coal fed into the furnace and in combination with the minimum total heat that the coal fed into the furnace needs to provide within this unit cycle, a system of equations is established, thereby obtaining the blending amounts of the three types of coal fed into the furnace that meet the minimum total heat that the coal fed into the furnace needs to provide within this unit cycle and have the minimum cost of the coal fed into the furnace. Guided by the obtained blending amounts of the coal fed into the furnace, the blending of the coal fed into the power generation boiler is adjusted, thereby achieving control of the cost of the coal fed into the furnace in each unit cycle. The present invention solves the technical problem in the prior art that using a fixed blending scheme for the coal fed into the furnace results in uncontrolled costs of the coal fed into the furnace and power generation, leading to increased industrial costs or unstable production. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of the method for blending coal fed into a power generation boiler in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention provides a method for blending coal fed into a power generation boiler, a calculation system, a storage medium, and a device. To facilitate the explanation of the method for blending coal fed into a power generation boiler, the calculation system, the storage medium, and the device in the present invention, the present invention will be described below with reference to the accompanying drawings and embodiments.

[0039] Embodiment 1

[0040] See Figure 1 , which shows a schematic diagram of a method for blending coal fed into a power generation boiler described in the present application, including:

[0041] S1: Obtain the power generation amount required for production in a unit cycle and the power generation efficiency of the power generation boiler unit as first data.

[0042] Optionally, in step S1, among the first data, the obtained power generation efficiency of the power generation boiler unit includes: the efficiency η1 of the power generation boiler, the efficiency η2 of the steam turbine, and the efficiency η3 of the generator.

[0043] It should be noted that the obtained efficiency η1 of the power generation boiler, the efficiency η2 of the steam turbine, and the efficiency η3 of the generator are all data that can be known during the production and installation of the power generation boiler unit. For example, when purchasing a power generation boiler, a steam turbine, and a generator, they can be directly obtained from the production instructions. Therefore, the obtaining process is not described in detail in this embodiment.

[0044] It should be noted that the unit cycle in the present invention is determined according to the usage cycle of the power generation boiler in actual application, and specifically can be one week, one day, or the cycle length required in actuality.

[0045] S2: Calculate the minimum total heat of the coal to be fed into the furnace within the unit cycle according to the first data.

[0046] Optionally, in step S2, the process of calculating the minimum total heat of the coal to be fed into the furnace within the unit cycle according to the first data is as follows:

[0047]

[0048] Wherein, E is the power generation amount required for production within the unit cycle, unit: KWh; Q min is the minimum total heat of the coal to be fed into the furnace within the unit cycle, unit: kcal.

[0049] It should be noted that the coefficient 859.845 in this formula is the calculation coefficient when converting electric energy into heat energy. Since the measurement unit of electric energy is mostly KWh (kilowatt-hour), and the measurement unit of heat energy is mostly kcal (kilocalorie), in order to facilitate subsequent calculations, the two are converted, that is, 1 KWh = 859.845 kcal.

[0050] S3: Obtain the usage data of three types of coal to be fed into the furnace respectively as the second data.

[0051] Optionally, in step S3, the second data includes: the stocks A, B, and C of each type of coal to be fed into the furnace obtained respectively; the unit cost data of each type of coal to be fed into the furnace: P A 、P B 、P C ; the unit heat data of each type of coal to be fed into the furnace: Q A 、Q B 、Q C .

[0052] Optionally, the cost data in the present invention includes the purchase and transportation unit prices of each type of coal to be fed into the furnace; the unit heat data of each type of coal to be fed into the furnace is obtained according to its coal properties.

[0053] It should be noted that the coal properties and unit heat of each type of coal to be fed into the furnace can be obtained during the purchase auction process, and will not be elaborated here.

[0054] Optionally, the cost data further includes the unit coal-breaking cost and unit coal-feeding cost of each type of coal to be fed into the furnace.

[0055] Specifically, since different types of coal to be fed into the furnace have different physical properties, the costs required for coal-breaking and coal-feeding during use are also different. Considering both the unit coal-breaking cost and unit coal-feeding cost as the cost data is conducive to more precise control of the blending ratio and cost of the coal to be fed into the furnace.

[0056] Further, the three types of coal fed into the furnace mentioned in the present invention can be specifically selected from common coal types such as dry coal slime, Yongxin coal, and Liangshuijing coal.

[0057] S4: Calculate the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace in this unit cycle is at the minimum value according to the second data and the minimum total heat of the coal fed into the furnace required.

[0058] Optionally, in step S4, the equations for calculating the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace in this unit cycle is at the minimum value are as follows:

[0059] Q min ≤aQ A +bQ B +cQ C

[0060] P=aP A +bP B +cP C

[0061] a≤A, b≤B, c≤C

[0062] Wherein, a, b, and c are respectively the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace in this unit cycle is at the minimum value, unit: ton.

[0063] In this embodiment, based on the data obtained in the foregoing steps, establish equations to analyze and obtain the blending ratios of the three types of coal fed into the furnace when the cost of the coal fed into the furnace is at the minimum value.

[0064] S5: Adjust the blending of the coal fed into the power generation boiler according to the blending ratios of the three types of coal fed into the furnace.

[0065] In this embodiment, calculate and obtain the minimum total heat that the coal fed into the furnace needs to provide in this unit cycle through the power generation amount required for unit cycle production and the power generation efficiency of the power generation boiler unit. According to the usage data of the three types of coal fed into the furnace and in combination with the minimum total heat that the coal fed into the furnace needs to provide in this unit cycle, establish equations, so as to obtain the blending ratios of the three types of coal fed into the furnace that meet the minimum total heat that the coal fed into the furnace needs to provide in this unit cycle and the cost of the coal fed into the furnace is at the minimum value. Guided by the obtained blending ratios of the coal fed into the furnace, adjust the blending of the coal fed into the power generation boiler, so as to control the cost of the coal fed into the furnace in each unit cycle. The present invention solves the technical problem in the prior art that the use of a fixed blending scheme for the coal fed into the furnace results in the uncontrolled cost of the coal fed into the furnace and power generation, causing an increase in industrial costs or unstable production.

[0066] Embodiment 2

[0067] The present invention also provides a calculation system for blending the coal fed into a power generation boiler, characterized in that the calculation system for blending the coal fed into a power generation boiler includes:

[0068] A data acquisition unit, configured to acquire the generated electricity demand in a unit cycle and the power generation efficiency of a power generation boiler unit as first data; and respectively acquire the usage data of three kinds of coal fed into the furnace as second data.

[0069] A calculation unit, configured to calculate the minimum total heat of the coal fed into the furnace required in the unit cycle according to the first data; and calculate the blending ratio of the three kinds of coal fed into the furnace when the cost of the coal fed into the furnace in the unit cycle is at the minimum according to the second data and the minimum total heat of the coal fed into the furnace required.

[0070] An output unit, configured to output the blending ratio of the three kinds of coal fed into the furnace.

[0071] It should be noted that those skilled in the art can clearly understand that the coal blending calculation system for the power generation boiler provided in this embodiment has the same specific working process as the coal blending method for the power generation boiler described in the first embodiment above. For the sake of convenience and brevity of description, the corresponding process in the first embodiment above can be referred to and will not be elaborated here.

[0072] Embodiment Three

[0073] The present invention further provides a storage medium, on which instructions are stored, and the instructions are generated based on the coal blending calculation method for the power generation boiler described in the first embodiment.

[0074] Specifically, the storage medium described in the present invention may specifically include a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, or a CD-ROM. It should be noted that those skilled in the art can specifically select the form and type of the storage medium according to actual production and use requirements, and no further limitation is made in this embodiment.

[0075] It should be noted that those skilled in the art can clearly understand that for the sake of convenience and brevity of description, the specific working process of the storage medium in this embodiment can be referred to the corresponding process in the first embodiment above and will not be elaborated here.

[0076] Embodiment Four

[0077] The present invention further provides a coal blending device for a power generation boiler, and the coal blending device for the power generation boiler includes a storage component, a processing component, and a regulation and control component;

[0078] Instructions are stored in the storage component, and the instructions are generated based on the coal blending method for the power generation boiler described in the first embodiment;

[0079] The processing component calls the instructions and outputs the blending ratio of the three kinds of coal fed into the furnace;

[0080] The control component performs blending operations on the coal fed into the furnace based on the blending amounts of three types of coal fed into the furnace.

[0081] Specifically, the storage component described in the present invention may specifically include a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, or a CD-ROM. It should be noted that those skilled in the art can specifically select the form and type of the storage medium according to actual production and usage requirements, and no further limitations are made in this embodiment.

[0082] It should be noted that those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working process of the coal blending device for the boiler furnace described above can refer to the corresponding process in the foregoing Embodiment 1, and will not be elaborated herein.

Claims

1. A method for blending coal for a power generation boiler, characterized in that: The method for blending coal for a power generation boiler comprises: S1: Obtain the power generation required by the production within a unit period and the power generation efficiency of the power generation boiler unit as the first data; S2: Calculate the minimum total heat of the coal entering the furnace required in the unit cycle according to the first data; S3: Obtain usage data of three types of coal fed into the furnace respectively as second data; S4: Calculate the blending amount of the three types of coal when the cost of the coal in the unit cycle is the minimum value according to the second data and the required minimum total heat of the coal in the furnace; S5: According to the blending amounts of the three types of coal, the blending amount of coal fed into the power generation boiler is adjusted.

2. The method for blending coal for power generation boiler according to claim 1, characterized in that: In the first data, the power generation efficiency of the power generation boiler unit includes: the efficiency η1 of the power generation boiler, the efficiency η2 of the steam turbine and the efficiency η3 of the generator.

3. The method for blending coal for power generation boiler according to claim 2, characterized in that: In step S2, the process of calculating the minimum total heat of the coal entering the furnace required in the unit cycle according to the first data is as follows: Among them, E is the power generation required for production in this unit cycle, unit: KWh; Q min It is the minimum total heat of coal required to enter the furnace during this unit cycle, unit: kcal.

4. The method for blending coal for power generation boiler according to claim 3, characterized in that: In step S3, the second data includes: the inventory A, B, C of each type of coal entering the furnace obtained respectively; the unit cost data of each type of coal entering the furnace: P A , P B , P C ; Unit calorific value of each coal fed into the furnace: Q A , Q B , Q C .

5. The method for blending coal for power generation boiler according to claim 4, characterized in that: The cost data include the purchase and transportation unit price of each type of coal entering the furnace; The unit calorific value data of each type of coal fed into the furnace is obtained according to its coal properties.

6. The method for blending coal for power generation boiler according to claim 5, characterized in that: The cost data also includes the unit coal breaking cost and unit coal loading cost for each type of coal entering the furnace.

7. The method for blending coal for power generation boiler according to claim 6, characterized in that: In step S4, the equation group for calculating the blending amount of the three types of coals when the cost of coals in the unit cycle is the minimum is as follows: Q min ≤aQ A +bQ B +cQ C P=aP A +bP B +cP C a≤A,b≤B,c≤C Wherein, a, b, c are the blending amounts of the three types of coal when the cost of coal entering the furnace is the minimum within the unit period, in tons.

8. A coal blending calculation system for a power generation boiler, characterized in that: The coal blending calculation system for the power generation boiler includes: The data acquisition unit is used to acquire the power generation required by the production in a unit period and the power generation efficiency of the power generation boiler unit as the first data; and respectively acquire the usage data of three types of coal fed into the furnace as the second data; a calculation unit, for calculating the minimum total heat of the coal fed into the furnace required in the unit cycle according to the first data; and calculating the blending amount of the three types of coal fed into the furnace when the cost of the coal fed into the furnace is the minimum in the unit cycle according to the second data and the minimum total heat of the coal fed into the furnace required; Output unit, outputs the blending amount of three types of coal entering the furnace.

9. A storage medium, characterized in that: The storage medium stores instructions, which are generated based on the method for blending coal into a power generation boiler according to any one of claims 1 to 7.

10. A coal blending device for a power generation boiler, characterized in that: The coal blending equipment for power generation boiler includes a storage component, a processing component and a control component; The storage component stores instructions, which are generated based on the method for blending coal into a power generation boiler according to any one of claims 1 to 7; The processing component calls the instruction and outputs the blending amount of three kinds of coals fed into the furnace; The regulating component performs blending operation on the incoming coal based on the blending amounts of the three types of incoming coal.

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