Fuel supply method and system for power supply insurance of garbage power plant

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By analyzing the average calorific value distribution of waste power plant fuel at different fermentation times, determining the optimal fermentation days, and fermenting and processing spare fuel in advance, the problem that waste power plants cannot effectively ensure power supply during peak power load is solved, and the maximum peak power generation capacity is achieved.

CN119647863APending Publication Date: 2025-03-18STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2

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Patent Information

Application Number: CN202411716338.7
Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner
Filing Date: 2024-11-27
Publication Date: 2025-03-18

AI Technical Summary

Technical Problem

The lack of research on fuel supply in waste power plants, especially peak capacity, has led to the inability to effectively ensure power supply when power loads are peaked.

Method used

By collecting information on waste power plant fuel in summer and winter, calculating the average calorific value distribution of fuel at different fermentation times, determining the optimal fermentation days in summer and winter, and fermenting treatment in advance at the predicted power supply and warranty time point, obtaining backup fuel to maximize power generation.

Benefits of technology

The garbage power plants have achieved the maximum capacity to maximize their peak when the power load is peaked, and the problem of insufficient power supply in the power grid is alleviated.

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Abstract

The invention provides a fuel supply method and system for power supply insurance of a garbage power plant. The fuel supply method comprises the following steps that fuel information of the garbage power plant in summer and fuel information of the garbage power plant in winter are collected; calculating the average calorific value distribution of the test fuel at different fermentation times in summer and winter; respectively taking the time when the average calorific value of the fuel is the highest in summer and winter as the optimal fermentation days to obtain the optimal fermentation days in summer and the optimal fermentation days in winter; performing fermentation treatment on the fuel in advance of the optimal summer fermentation days and the optimal winter fermentation days respectively at the predicted time points when power supply and conservation are needed in summer and winter, so as to obtain a summer standby fuel and a winter standby fuel; and at the summer and winter power supply and conservation time points, the summer standby fuel and the winter standby fuel are adopted as supply fuel for power generation. According to the invention, the maximum peak capability can be exerted during power supply insurance of the garbage power plant, and the problem of insufficient power supply of a power grid can be alleviated to a certain extent.

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Description

Technical Field

[0001] The present invention relates to the technical field of fuel supply for garbage power plants, and in particular to a fuel supply method and system for ensuring power supply for garbage power plants. Background Art

[0002] The characteristics of the "winter and summer" double peaks of my country's power load are becoming increasingly obvious, with the summer cooling load and winter heating load accounting for an increasing proportion. In some provinces, the summer cooling load accounts for 40%-50% of the highest power load, or even more than 50%, and the power supply and demand are in a tight balance. Taking Henan Province as an example, the power supply situation in Henan Province during the peak summer period is relatively severe and complex. It is estimated that the maximum load of Henan power grid this year will be 83.5 million kilowatts, an increase of 5.58 million kilowatts year-on-year, an increase of 7.2%. This year's peak gap is 7.5 million kilowatts, and the supply situation is severe. Due to the randomness, uncertainty and transient nature of renewable energy such as wind power and photovoltaic power, which depends on the weather, the severe situation of power supply has been further increased. Garbage power plants have gradually played a certain role in the peak summer and winter due to their advantages in domestic waste disposal and short-term peak capacity.

[0003] However, the fermentation time and composition of domestic waste will have a great impact on the peak output capacity of waste-to-energy plants, so it is necessary to consider the fuel supply and management of waste-to-energy plants. Current fuel supply research includes the study of the game between relevant stakeholders in the biomass power generation fuel supply chain; the optimization of the biomass fuel supply chain network; and the research on multimodal biofuel supply chain risk decision-making methods. Currently, there is a lack of research on the fuel supply of waste-to-energy plants, especially research involving peak capacity. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a fuel supply method and system for ensuring power supply to garbage power plants, which can maximize the peak capacity when ensuring power supply to garbage power plants and alleviate the problem of insufficient power supply in the power grid to a certain extent.

[0005] The present invention adopts the following technical solution.

[0006] A first aspect of the present invention provides a fuel supply method for ensuring power supply to a waste power plant, characterized in that it comprises the following steps:

[0007] Collect fuel information of waste-to-energy plants in summer and waste-to-energy plants in winter;

[0008] Based on the collected information, the average calorific value distribution of fuels under different fermentation times in summer and winter test fuels is calculated;

[0009] The time when the average calorific value of fuel is the highest in summer and winter is taken as the optimal fermentation days, and the optimal fermentation days in summer and winter are obtained;

[0010] At the predicted time points in summer and winter when power supply is needed, the fuel is fermented in advance by the optimal fermentation days in summer and the optimal fermentation days in winter, respectively, to obtain summer backup fuel and winter backup fuel;

[0011] During the summer and winter power supply guarantee time points, summer reserve fuel and winter reserve fuel are used as supply fuel for power generation respectively.

[0012] Preferably, the summer waste power plant fuel information and the winter waste power plant fuel information include: the main components and proportions of the summer and winter waste power plant fuels.

[0013] Preferably, the collected fuel information of the waste power plant in summer and the fuel information of the waste power plant in winter are described according to the following formula:

[0014] X i =f(x i ,m i )

[0015] Where, X i is the information of the i-th component of the waste power plant fuel in summer or winter, including the type and mass proportion of the waste power plant fuel, f(x i ,m i ) is the information summary of the i-th component, where x i is the name of the i-th component, m i is the mass proportion of the i-th component in the fuel, %.

[0016] Preferably, the formula for calculating the average calorific value distribution of fuel under different fermentation times of the summer test fuel is:

[0017]

[0018] In the formula, is the average calorific value of the fuel after fermentation on the jth day in summer, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ija It is the lower calorific value of the i-th component of the waste-to-energy plant fuel after fermentation on the j-th day in summer, J / kg.

[0019] Preferably, the Q ija Obtained through calorific value testing conducted in the laboratory.

[0020] Preferably, the maximum number of days used to calculate the average calorific value of the fuel in summer is 15.

[0021] Preferably, the formula for calculating the average calorific value distribution of fuel under different fermentation times of winter test fuel is:

[0022]

[0023] In the formula, is the average calorific value of the fuel after fermentation on the jth day in winter, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ijb It is the lower calorific value of the i-th component of the waste-to-energy plant fuel after fermentation on the j-th day in winter, J / kg.

[0024] Preferably, the Q ijb Obtained through calorific value testing conducted in the laboratory.

[0025] Preferably, the maximum number of days used to calculate the average calorific value of the fuel in winter is 15.

[0026] The second aspect of the present invention provides a system that utilizes the aforementioned fuel supply method for ensuring power supply to waste power plants, the system comprising: an information collection module, a calculation module and a fuel supply system; the information collection module is used to collect fuel information of the waste power plant in summer and winter; the calculation module is used to use the information in the information collection module to calculate the average calorific value distribution of the fuel under different fermentation times of the chemical fuel in summer and winter, and obtain the optimal fermentation days in summer and the optimal fermentation days in winter; the fuel supply system uses the spare fuel that has been fermented in advance for the optimal fermentation days as the fuel for ensuring power supply in summer and winter based on the calculation results of the calculation module.

[0027] Compared with the prior art, the beneficial effect of the present invention is that: based on the different composition and proportion of fuel in garbage power plants in summer and winter, the present invention provides a fuel supply method for ensuring power supply to garbage power plants in summer and winter respectively. The optimal fermentation time is obtained by analyzing the average calorific value distribution of the fuel under different fermentation times, and then the fuel is fermented by the optimal fermentation days in advance of the predicted supply guarantee time point, so that when the supply guarantee time point is reached, the fuel is just at the optimal fermentation time, which can maximize the calorific value of the fuel and achieve the maximum peak capacity when ensuring power supply to the garbage power plant, which can alleviate the problem of insufficient power supply in the power grid to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The figure is a flow chart of the fuel supply method for ensuring power supply to a garbage power plant in the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only embodiments of a part of the present invention, rather than all embodiments. Based on the spirit of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the protection scope of the present invention.

[0030] Embodiment 1 of the present invention proposes a fuel supply method and system for ensuring power supply to a waste power plant, the process is as follows: Figure 1 As shown, the following steps are included:

[0031] Step 101: Analyze the main components and proportions of waste power plant fuel in summer and winter.

[0032] First, collect fuel information of summer waste-to-energy plants and winter waste-to-energy plants, including the main components and proportions of fuels of summer and winter waste-to-energy plants;

[0033] Secondly, the main components and proportions of waste power plant fuel in summer and winter are analyzed and described according to the following formula:

[0034] X i =f(x i ,m i ) (1)

[0035] Where, X i is the information of the i-th component of the waste power plant fuel in summer or winter, including the type and mass proportion of the waste power plant fuel, f(x i ,m i ) is the information summary of the i-th component, where x i is the name of the i-th component, m i is the mass proportion of the i-th component in the fuel, %.

[0036] The main components of waste-to-energy plants include organic matter, inorganic matter, and recyclables. The proportions of these components vary depending on factors such as region, season, and living habits, and mainly include: kitchen waste, garden waste, plastic waste, textiles, etc. Winter and summer have different seasonal differences due to different material usage and eating habits. Therefore, the present invention analyzes the fuel of waste-to-energy plants in winter and summer respectively.

[0037] Step 102, based on the information collected in step 101, calculate the average calorific value distribution of the fuel under different fermentation times in summer, and take the time with the highest average calorific value in summer as the best fermentation day in summer.

[0038] First, calculate the average calorific value of fuel on the jth day in summer using the following formula:

[0039]

[0040] In the formula, is the average calorific value of the fuel after fermentation on the jth day in summer, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ija is the lower calorific value of the i-th component of the waste power plant fuel after fermentation on the j-th day in summer, J / kg, which can be obtained through calorific value test in the laboratory; generally, there is a maximum value j max About 15.

[0041] Then, based on formula (2), the average calorific value of fuel in the waste power plant in summer can be obtained: max The distribution of days in the fermentation process is used to find the fermentation day with the largest average calorific value of the fuel, so that the optimal fermentation day with the highest calorific value of the fuel in summer is j. max-a sky.

[0042] Step 103. Similarly, according to the information collected in step 101, the average calorific value distribution of the fuel under different fermentation times in winter is calculated, and the time with the highest average calorific value in winter is taken as the best fermentation day in winter.

[0043] The average calorific value of fuel on the jth day in winter is calculated using the following formula:

[0044]

[0045] In the formula, is the average calorific value of the fuel after fermentation on the jth day in winter, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ijb is the lower calorific value of the i-th component of the waste power plant fuel after fermentation on the j-th day in winter, J / kg, which can be obtained through calorific value test in the laboratory; generally, j is about 15; generally, the maximum value of j is j max About 15.

[0046] Then, based on formula (3), the average calorific value of fuel in the waste power plant in winter can be obtained: max The distribution of days in the fermentation process is used to find the fermentation day with the maximum average calorific value of the fuel, so that the optimal fermentation day with the highest calorific value of the fuel in winter is j. max-b sky.

[0047] Step 104: Based on the power load forecast and the power generation capacity forecast of the entire city, the optimal fermentation days in summer are set in advance for the time point when power supply is required. max-a The waste power plant fuel is fermented as backup fuel, and the optimal fermentation days in winter are advanced max-bThe waste-to-energy plant fuel is fermented every day as backup fuel.

[0048] Step 105: In summer, when the power supply is guaranteed, the fuel of the waste power plant is replaced with fermentation fuel. max-a In the summer, the fuel of the waste power plant is replaced by fermented j max-b The winter backup fuel is used to generate electricity, thereby completing the fuel supply method for ensuring the power supply of waste power plants.

[0049] Embodiment 2 of the present invention provides a system for the fuel supply method for ensuring power supply to a waste power plant using embodiment 1. The system includes: an information collection module, a calculation module and a fuel supply system.

[0050] The information collection module is used to collect fuel information of the waste power plant in summer and winter. The calculation module is used to use the information in the information collection module to calculate the average calorific value distribution of the fuel under different fermentation times in summer and winter, and obtain the optimal fermentation days in summer and winter; based on the calculation results of the calculation module, the fuel supply system uses the spare fuel fermented in advance with the optimal fermentation days as the fuel for power supply in summer and winter.

[0051] Compared with the prior art, the beneficial effect of the present invention is that: based on the different composition and proportion of fuel in garbage power plants in summer and winter, the present invention provides a fuel supply method for ensuring power supply to garbage power plants in summer and winter respectively. The optimal fermentation time is obtained by analyzing the average calorific value distribution of the fuel under different fermentation times, and then the fuel is fermented by the optimal fermentation days in advance of the predicted supply guarantee time point, so that when the supply guarantee time point is reached, the fuel is just at the optimal fermentation time, which can maximize the calorific value of the fuel and achieve the maximum peak capacity when ensuring power supply to the garbage power plant, which can alleviate the problem of insufficient power supply in the power grid to a certain extent.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A fuel supply method for ensuring power supply to a waste power plant, characterized in that: The following steps are involved: Collect fuel information of waste-to-energy plants in summer and waste-to-energy plants in winter; Based on the collected information, the average calorific value distribution of fuels under different fermentation times in summer and winter test fuels is calculated; The time when the average calorific value of fuel is the highest in summer and winter is taken as the optimal fermentation days, and the optimal fermentation days in summer and winter are obtained; At the predicted time points in summer and winter when power supply is needed, the fuel is fermented in advance by the optimal fermentation days in summer and the optimal fermentation days in winter, respectively, to obtain summer backup fuel and winter backup fuel; During the summer and winter power supply guarantee time points, summer reserve fuel and winter reserve fuel are used as supply fuel for power generation respectively.

2. The fuel supply method for ensuring power supply to a waste power plant according to claim 1 is characterized by: The summer waste power plant fuel information and the winter waste power plant fuel information include: the main components and proportions of the summer and winter waste power plant fuels.

3. The fuel supply method for ensuring power supply to a waste power plant according to claim 2 is characterized by: The collected fuel information of the waste power plant in summer and the fuel information of the waste power plant in winter are described as follows: X i =f(x i ,m i ) Where, X i is the information of the i-th component of the waste power plant fuel in summer or winter, including the type and mass proportion of the waste power plant fuel, f(x i ,m i ) is the information summary of the i-th component, where x i is the name of the i-th component, m i is the mass proportion of the i-th component in the fuel, %.

4. The fuel supply method for ensuring power supply to a waste power plant according to any one of claims 1 to 3, characterized in that: The formula for calculating the average calorific value distribution of fuel under different fermentation times for summer test fuel is: In the formula, is the average calorific value of the fuel after fermentation on the jth day in summer, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ija It is the lower calorific value of the i-th component of the waste-to-energy plant fuel after fermentation on the j-th day in summer, J / kg.

5. The fuel supply method for ensuring power supply to a waste power plant according to claim 4 is characterized by: The Q ija Obtained through calorific value testing conducted in the laboratory.

6. The fuel supply method for ensuring power supply to a waste power plant according to claim 4 is characterized by: The maximum number of days used to calculate the average calorific value of fuel in summer is 15.

7. The fuel supply method for ensuring power supply to a waste-to-energy plant according to any one of claims 1 to 3, characterized in that: The formula for calculating the average calorific value distribution of fuel under different fermentation times for winter test fuel is: In the formula, is the average calorific value of the fuel after fermentation on the jth day in winter, J / kg; n means that the fuel of the waste power plant has a total of n components, Q ijb It is the lower calorific value of the i-th component of the waste-to-energy plant fuel after fermentation on the j-th day in winter, J / kg.

8. The fuel supply method for ensuring power supply to a waste power plant according to claim 7 is characterized by: The Q ijb Obtained through calorific value testing conducted in the laboratory.

9. The fuel supply method for ensuring power supply to a waste power plant according to claim 7 is characterized by: The maximum number of days used to calculate the average calorific value of the fuel in winter is 15.

10. A system for ensuring power supply of a waste power plant using the fuel supply method according to any one of claims 1 to 9, characterized in that: The system comprises: an information collection module, a calculation module and a fuel supply system; The information collection module is used to collect fuel information of waste power plants in summer and winter; The calculation module is used to calculate the average calorific value distribution of the fuel under different fermentation times of the tested fuel in summer and winter by using the information in the information collection module, and obtain the optimal fermentation days in summer and the optimal fermentation days in winter; The fuel supply system uses the reserve fuel fermented in advance for the optimal fermentation days as the fuel for summer and winter power supply guarantee based on the calculation result of the calculation module.