Energy supply adjustment method and coupled energy supply system

Abstract

The application provides a power supply adjustment method and a coupled power supply system. The power supply adjustment method determines a waste heat power generation power according to a heat generation rate of a steam generation device, a system heat utilization efficiency, a unit clinker heat consumption and a clinker production plan. The waste heat power generation power is used to determine a required heat in a target period. A first gas amount is determined according to the required heat in the target period. A short-term cold / heat load prediction value is accumulated to obtain a required heat production in the target period. A second gas amount is determined according to the required heat production in the target period. A required amount of biomass in the target period is estimated according to the first gas amount and the second gas amount.

Description

Technical Field

[0001] This application relates to the field of power system technology, and more specifically, to power supply regulation methods and their coupled power supply systems. Background Technology

[0002] As the average operating rate of cement kilns decreases, cement plant clinker production lines will be shut down for longer periods, resulting in insufficient waste heat generated from clinker calcination. Insufficient waste heat will lead to a decrease in turbine load rate and a reduction in waste heat power generation.

[0003] Waste heat power generation operates on the principle of "power generation based on heat," meaning that clinker production plans will not be adjusted to generate more electricity. Therefore, a reduction in waste heat power generation means that more other types of electricity will be needed (such as purchasing thermal power), which will increase carbon emissions. Summary of the Invention

[0004] In view of this, this application provides an energy supply regulation method and its coupled energy supply system, with the aim of maintaining waste heat power generation and reducing carbon emissions without the need for additional power supply.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] The first aspect of this application provides a power supply regulation method, the method comprising:

[0007] The waste heat power generation capacity is determined based on the heat consumption rate of the steam generation unit, the system heat utilization efficiency, the unit clinker heat consumption, and the clinker production plan.

[0008] The heat required for the target time period is determined by utilizing the waste heat power generation capacity.

[0009] The first gas volume is determined based on the heat required during the target time period;

[0010] By accumulating the short-term forecasts of cooling / heating loads, the required heat production for the target period is obtained;

[0011] The second gas quantity is determined based on the heat production required during the target time period;

[0012] Based on the first gas volume and the second gas volume, estimate the biomass demand during the target time period.

[0013] Optionally, determining the waste heat power generation capacity based on the heat utilization rate of the steam generation unit, the system thermal efficiency, the unit clinker heat consumption, and the clinker production plan includes:

[0014] The overall efficiency is obtained by multiplying the heat rate of the steam generator and the system heat utilization efficiency.

[0015] Determine the clinker demand from the clinker production plan;

[0016] The waste heat power generation capacity is obtained by multiplying the preset target coefficient, the clinker demand, the unit clinker heat consumption, and the overall efficiency.

[0017] Optionally, determining the required heat during the target time period using the waste heat power generation includes:

[0018] Calculate the difference between the waste heat power generation capacity and the design power of the generator set;

[0019] The difference is accumulated based on the accumulated time to obtain the required waste heat power generation within the target time period; wherein, the accumulated time is determined according to the target time period;

[0020] The waste heat power generation is converted according to the electrothermal conversion coefficient to obtain the heat required within the target time period.

[0021] Optionally, determining the first gas quantity based on the heat required during the target time period includes:

[0022] The first gas quantity is calculated based on the heat required during the target time period and the calorific value of the biomass gas.

[0023] Optionally, the accumulation of short-term predicted values ​​of cooling / heating loads to obtain the required heat generation during the target period includes:

[0024] The short-term forecast values ​​of cooling / heating loads are accumulated based on the cumulative time to obtain the required heat production within the target time period, wherein the cumulative time is determined according to the target time period.

[0025] Optionally, determining the second gas quantity based on the heat generation during the target time period includes:

[0026] The second gas quantity is calculated based on the heat generated during the target time period and the calorific value of the biomass gas per unit.

[0027] Optionally, estimating the biomass demand during the target time period based on the first and second gas consumption includes:

[0028] Based on the first gas consumption and the unit biomass gas production, determine the first biomass demand.

[0029] The second biomass demand is determined based on the second gas production and the unit biomass gas production.

[0030] The biomass demand during the target time period is obtained by summing the first demand and the second demand.

[0031] Optionally, the short-term predicted values ​​of cooling / heating load are obtained by using the target cooling / heating load power data and target meteorological data through a short-term cooling / heating load prediction model;

[0032] The short-term cold / heat load prediction model is obtained by training a neural network using historical cold / heat load power data and historical meteorological data.

[0033] The second aspect of this application provides a coupled energy supply system, including: a processor, a steam generation device, a combustion device, a power equipment, a generator, and a flue gas direct combustion engine;

[0034] The processor is used to determine the amount of biomass required to be fed into the combustion device using the energy regulation method provided in the first aspect of this application;

[0035] The input end of the steam generating device receives waste heat, and the output end of the steam generating device is connected to the first input end of the combustion supplementary device.

[0036] The second input terminal of the afterburning device receives the required amount of biomass, the first output terminal of the afterburning device is connected to the input terminal of the power equipment, and the output terminal of the power equipment is connected to the input terminal of the generator.

[0037] The first input terminal of the flue gas direct combustion engine is connected to the second output terminal of the supplementary combustion device, and the second input terminal of the flue gas direct combustion engine is connected to the third output terminal of the supplementary combustion device.

[0038] Optionally, the afterburning device includes a heating device and a storage device;

[0039] The output end of the steam generating device is connected to the first input end of the heating device; wherein, the first input end of the heating device is the first input end of the combustion supplement device;

[0040] The second input terminal of the heating device is connected to the first output terminal of the storage device, and the first output terminal of the heating device is connected to the output terminal of the power equipment; wherein, the first output terminal of the heating device is the first output terminal of the afterburning device;

[0041] The first input terminal of the flue gas direct combustion engine is connected to the second output terminal of the heating device, and the second input terminal of the flue gas direct combustion engine is connected to the second output terminal of the storage device; wherein, the second output terminal of the heating device is the second output terminal of the supplementary combustion device, and the second output terminal of the storage device is the third output terminal of the supplementary combustion device.

[0042] Optionally, the storage device includes: a gasification device, a purification device, and a gas storage device;

[0043] The gasification equipment receives the required amount of biomass at its input end, and its output end is connected to the input end of the purification equipment; wherein, the input end of the gasification equipment is the second input end of the afterburner.

[0044] The output end of the purification device is connected to the input end of the gas storage device, and the first output end of the gas storage device is connected to the second input end of the heating device; wherein, the first output end of the gas storage tank is the first output end of the storage device;

[0045] The second output end of the gas storage device is connected to the second input end of the flue gas direct combustion engine; wherein, the second output end of the gas storage device is the second output end of the storage device.

[0046] The energy supply regulation method provided in this application determines the waste heat power generation capacity based on the heat utilization rate of the steam generator, the system thermal efficiency, the unit clinker heat consumption, and the clinker production plan; uses the waste heat power generation capacity to determine the heat required in a target period; determines the first gas quantity based on the heat required in the target period; accumulates the short-term predicted values ​​of cold / heat loads to obtain the heat production required in the target period; determines the second gas quantity based on the heat production required in the target period; estimates the biomass demand in the target period based on the first gas quantity and the second gas quantity, and inputs the required amount of biomass into the coupled energy supply system. This allows the coupled energy supply system to use the input biomass to generate corresponding gas for supplementary combustion when the waste heat is insufficient, thus maintaining waste heat power generation. This avoids the need for additional power supply, reduces carbon emissions, and the technical solution provided in this application can also reasonably predict the biomass demand that needs to be input into the coupled energy supply system, thereby ensuring a balance between biomass supply and coupled power generation. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0048] Figure 1 A schematic flowchart illustrating an energy supply regulation method provided in an embodiment of this application;

[0049] Figure 2 This is a schematic diagram of a coupled power supply system provided in an embodiment of this application;

[0050] Figure 3 This is a schematic diagram of another coupled power supply system provided in an embodiment of this application. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] In this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0053] See Figure 1 The diagram shows a flowchart of a power supply regulation method provided in an embodiment of this application. The power supply regulation method specifically includes the following steps:

[0054] S101: Determine the waste heat power generation capacity based on the heat utilization rate of the steam generation unit, the system heat utilization efficiency, the unit clinker heat consumption, and the clinker production plan.

[0055] In the specific execution step S101, the clinker production plan of the cement plant clinker production line within the target time period, the current heat consumption rate of the steam generator of the waste heat boiler, the current system thermal utilization efficiency of the coupled energy supply system, and the waste heat power generation power can be calculated based on the heat consumption rate of the steam generator, the system thermal utilization efficiency, the unit clinker heat consumption and the clinker production plan.

[0056] In this embodiment, the heat utilization rate of the steam generator is calculated based on the ratio of sensible heat of the preheater outlet exhaust gas to the total waste heat and the ratio of sensible heat of the grate cooler exhaust air to the total waste heat. Specifically, the heat utilization rate of the steam generator is obtained by summing the ratio of sensible heat of the preheater outlet exhaust gas to the total waste heat and the ratio of sensible heat of the grate cooler exhaust air to the total waste heat. The calculation method for the heat utilization rate of the steam generator is shown in formula (1):

[0057] β=φ yr +φ bl (1)

[0058] Where β is the heat rate of the steam generating unit, and φ yr φ represents the proportion of sensible heat in the exhaust gas at the preheater outlet to the total waste heat. blThe proportion of sensible heat from the waste air in the grate cooler to the total waste heat.

[0059] In this embodiment, the system thermal efficiency can also be calculated based on the historical waste heat power generation capacity and the thermal power of the steam generation device. Specifically, the system thermal efficiency is obtained by dividing the historical waste heat power generation capacity by the thermal power of the steam generation device. The calculation method for the system thermal efficiency is shown in formula (2):

[0060]

[0061] Where, η I For the system's thermal efficiency, P y ' represents the historical waste heat power generation capacity, and ΔQ represents the thermal power of the steam generation device.

[0062] Optionally, a target coefficient can be predetermined so that the heat rate of the steam generating unit and the system heat utilization efficiency can be multiplied to obtain the total efficiency; the clinker demand can be determined from the clinker production plan; and the waste heat power generation can be obtained by multiplying the preset target coefficient, clinker demand, unit clinker heat consumption, and total efficiency. For example, when the target coefficient is preset to 1000 / 24*3600, the waste heat power generation is calculated as shown in formula (3):

[0063]

[0064] Among them, P y η is the power generated by waste heat, β is the heat utilization rate of the steam generation device, and η is the power generated by waste heat. I The system thermal efficiency is given by ΔQ, where ΔQ is the thermal power of the waste heat boiler, and m s The clinker demand in the clinker production plan is represented by r, which is the heat consumption per unit of clinker.

[0065] S102: Utilize waste heat to generate electricity and determine the heat required during the target time period.

[0066] In the specific execution of step S102, after determining the waste heat power generation capacity, the waste heat power generation capacity can be further used to determine the amount of waste heat power generation required in the target time period, so as to perform electrothermal conversion on the amount of waste heat power generation required in the target time period to obtain the heat required in the target time period.

[0067] It should be noted that the target period can be the next 7 days. For example, if the current time is February 15, 2023, then the target period can be from February 15, 2023 to February 22, 2023. The selection of the target period can be based on the actual application, and this application embodiment does not limit it.

[0068] Optionally, firstly, calculate the difference between the waste heat power generation and the design power of the generator set; secondly, determine the cumulative time based on the target period, and accumulate the difference based on the cumulative time to obtain the waste heat power generation required within the target period; finally, convert the waste heat power generation according to the electrothermal conversion coefficient to obtain the heat required within the target period.

[0069] In practical applications, the sampling frequency can be in seconds. If the target period is the next 7 days, the cumulative time determined based on the target period can be 3600*24*7. At this time, the calculation method for the required waste heat power generation within the target period is as shown in formula (4):

[0070]

[0071] Among them, P ys,i Let P be the design power of the generator set at time i. y,i The waste heat power generation at time i, (P ys,i -P y,i () represents the difference between the waste heat power generation capacity and the design power of the generator set.

[0072] Taking the cumulative time of 3600*24*7 as an example, after calculating the amount of waste heat power generation required within the target time period, the waste heat power generation within the target time period can be converted into the heat required within the target time period according to the electrothermal conversion coefficient. The heat conversion method required within the target time period is shown in formula (5):

[0073]

[0074] Where, η I Electrothermal conversion coefficient.

[0075] It should be noted that the electrothermal conversion coefficient is also called the system thermal efficiency.

[0076] S103: Determine the first gas quantity based on the heat required during the target time period.

[0077] In this embodiment, after calculating the heat required during the target time period, the first gas quantity can be calculated based on the heat required during the target time period and the calorific value of the biomass gas per unit.

[0078] Specifically, the required heat during the target period can be divided by the calorific value of the unit biomass gas to obtain the first gas value required during the target period. Taking the cumulative time of 3600*24*7 as an example, the calculation method of the first gas value is as shown in formula (6).

[0079]

[0080] Where H represents the calorific value of a unit of biomass gas.

[0081] In practical applications, when the waste heat of the coupled energy supply system is insufficient, some gas needs to be introduced for supplemental combustion. The first gas value is the gas value that the coupled energy supply system needs to introduce within the target time period.

[0082] S104: Accumulate short-term forecasts of cooling / heating loads to obtain the required heat generation during the target period.

[0083] In this embodiment, historical cooling / heating load power data and historical meteorological data can be obtained, and the neural network can be trained using the historical cooling / heating load power data and historical meteorological data to obtain a short-term value prediction model for cooling / heating load.

[0084] Specifically, historical cooling / heating load power data and historical meteorological data are input into the neural network so that the neural network can predict the initial short-term cooling / heating load based on the historical cooling / heating load power data and historical meteorological data. The parameters of the neural network are adjusted with the goal of the initial short-term cooling / heating load prediction value approaching the target short-term cooling / heating load prediction value, until the neural network reaches convergence, thus obtaining the short-term cooling / heating load prediction model.

[0085] In this embodiment, recent target cooling / heating load power data can be filtered from historical cooling / heating load power data, and recent target meteorological data can be filtered from historical meteorological data, so as to use the target cooling / heating load power data and target meteorological data to predict the short-term value of cooling / heating load using the short-term value prediction model of cooling / heating load.

[0086] The "nearest period" can be the previous 7 days. For example, if the current time is February 15, 2023, then the target period can be from February 15, 2023 to February 22, 2023. The specific time period for the "nearest period" can be selected according to the actual application, and this application embodiment does not limit it.

[0087] Specifically, the target cooling / heating load power data and target meteorological data can be input into the short-term cooling / heating load prediction model. The short-term cooling / heating load prediction model makes predictions based on the target cooling / heating load power data and target meteorological data to obtain short-term predicted values ​​of cooling / heating load. The short-term predicted values ​​of cooling / heating load are then accumulated to obtain the heat generation required within the target period.

[0088] Optionally, after determining the corresponding cumulative time based on the target period, the short-term forecast values ​​of cooling / heating loads can be accumulated based on the cumulative time to obtain the required heat generation within the target period.

[0089] In practical applications, the sampling frequency can be in seconds. If the target period is the next 7 days, then the cumulative time determined based on the target period can be 3600*24*7. The calculation method for the required heat generation within the target period is shown in formula (7):

[0090]

[0091] Among them, Q HAVC，i These are short-term forecasts of cooling / heating loads.

[0092] It should be noted that, in the specific execution of this application, steps S101 and S104 can be executed simultaneously, or steps S101 to S103 can be executed first and then step S104 can be executed, or steps S104 to S106 can be executed first and then step S101 can be executed. This application does not limit the execution order of steps S101 and S104.

[0093] S105: Determine the second gas quantity based on the heat generated during the target time period.

[0094] In this embodiment, after calculating the heat production required within the target time period, the second gas quantity can be calculated based on the heat production within the target time period and the calorific value of the biomass gas per unit.

[0095] Specifically, the heat generated during the target period can be divided by the calorific value of the biomass fuel gas to obtain the second fuel gas value required during the target period. Taking the cumulative time of 3600*24*7 as an example, the calculation method of the second fuel gas value is as shown in formula (8).

[0096]

[0097] Where H represents the calorific value of a unit of biomass gas.

[0098] In practical applications, when the waste heat is insufficient, the coupled energy supply system not only needs to introduce some gas for supplementary combustion, but also needs to estimate the gas required for heating / cooling by the flue gas direct combustion engine in the coupled energy supply system. The second gas value is the gas value required by the flue gas direct combustion engine in the target time period.

[0099] S106: Estimate the biomass demand during the target period based on the first and second gas consumption.

[0100] In this embodiment, after calculating the first gas quantity and the second gas quantity, the first biomass demand can be calculated based on the first gas quantity, and the second biomass demand can be calculated based on the second gas quantity. The first biomass demand and the second biomass demand are then summed to obtain the total biomass demand within the target time period, which is the total biomass demand required by the coupled energy supply system within the target time period.

[0101] Optionally, the first demand for biomass is determined based on the first gas consumption and the unit biomass gas production; the second demand for biomass is determined based on the second gas consumption and the unit biomass gas production; and the first and second demands are summed to obtain the biomass demand during the target period.

[0102] Specifically, the first biomass demand can be obtained by dividing the first biomass gas production by the unit biomass gas production. Taking the cumulative time of 3600*24*7 as an example, the calculation method of the first biomass demand is as shown in formula (9).

[0103]

[0104] Where, m sw，1 ε is the primary requirement for biomass. rq The amount of biogas produced per unit of biomass.

[0105] The second biomass demand can be obtained by dividing the second biogas production by the unit biomass gas production. Taking the cumulative time of 3600*24*7 as an example, the calculation method of the second biomass demand is as shown in formula (10).

[0106]

[0107] Where, m sw，2 As the second demand for biomass, ε rq The amount of biogas produced per unit of biomass.

[0108] The energy supply regulation method provided in this application determines the waste heat power generation capacity based on the heat utilization rate of the steam generator, the system thermal efficiency, the unit clinker heat consumption, and the clinker production plan; utilizes the waste heat power generation capacity to determine the heat required within a target time period; determines the first gas quantity based on the heat required within the target time period; accumulates the short-term predicted values ​​of the cold / heat load to obtain the heat production required within the target time period; determines the second gas quantity based on the heat production required within the target time period; estimates the biomass demand within the target time period based on the first and second gas quantities, and inputs the required amount of biomass into the coupled energy supply system. This allows the coupled energy supply system to utilize the input biomass to generate corresponding gas for supplementary combustion when the waste heat is insufficient, thus maintaining waste heat power generation. This avoids the need for additional power supply, reduces carbon emissions, and the technical solution provided in this application can also reasonably predict the biomass demand that needs to be input into the coupled energy supply system, thereby ensuring a balance between biomass supply and coupled power generation.

[0109] Based on the energy supply regulation method provided in this application, embodiments of this application also provide a coupled energy supply system, such as... Figure 2 As shown, the coupled energy supply system includes a processor 201, a steam generation device 202, a combustion device 203, a power equipment 204, a generator 205, and a flue gas direct combustion engine 206;

[0110] The processor 201 is used to determine the required amount of biomass to be fed into the combustion device using the energy supply regulation method provided in this application; the input end of the steam generator 202 receives waste heat, and the output end of the steam generator 202 is connected to the first input end of the combustion device 203; the second input end of the combustion device 203 receives the required amount of biomass, the first output end of the combustion device 203 is connected to the input end of the power equipment 204, the output end of the power equipment 204 is connected to the input end of the generator 205, and the output end of the generator 205 is connected to the target device; the first input end of the flue gas direct combustion engine 206 is connected to the second output end of the combustion device 203, and the second input end of the flue gas direct combustion engine 206 is connected to the third output end of the combustion device 203.

[0111] In this embodiment, the waste heat generated during the clinker calcination process in a cement plant clinker production line can be used as a waste heat resource. This waste heat is input into the steam generator 202, whereby the steam generator 202 processes the input waste heat to generate high-temperature main steam, which is then input into the combustion supplementary device 203. Simultaneously, the processor 201 executes the energy supply regulation method provided in this application to determine the required amount of biomass to be fed into the combustion supplementary device. The processor 201 then captures the required amount of biomass using a preset method and feeds it into the combustion supplementary device 203. The combustion supplementary device 203 then gasifies the input biomass to generate fuel gas, which is then stored.

[0112] When the combustion supplement device 203 receives the main steam, it can determine whether the main steam flow rate is equal to the standard main steam flow rate and whether the main steam temperature is equal to the standard main steam temperature. If the main steam flow rate is less than the standard main steam flow rate and the main steam temperature is less than the target main steam temperature, the combustion supplement device 203 uses a gas-fired water heating pump to supply water at room temperature to the first preset temperature to generate steam, so that the steam flow rate and the main steam flow rate reach the standard main steam flow rate and the steam temperature and the main steam temperature reach the standard main steam temperature. The power equipment 204 uses the steam and the main steam to drive the generator 205 to generate electricity.

[0113] If the main steam flow rate is less than the target main steam flow rate and the main steam temperature is greater than the target main steam temperature, the combustion supplement device uses a gas-fired heating water pump to supply water at room temperature to the second preset temperature to generate steam, so that the steam flow rate and the main steam flow rate reach the standard main steam flow rate, and the steam temperature and the main steam temperature reach the standard main steam temperature; wherein, the second preset temperature is less than the first preset temperature; the power equipment 204 uses the steam and the main steam to drive the generator 205 to generate electricity.

[0114] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is less than the standard main steam temperature, the main steam is heated to the standard main steam temperature using natural gas; the power equipment 204 uses the heated main steam to drive the generator 205 to generate electricity.

[0115] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is equal to the standard main steam temperature, the power equipment 204 uses the main steam to drive the generator 205 to generate electricity.

[0116] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is greater than the standard main steam temperature, the desuperheating water valve is opened until the main steam temperature is equal to the standard main steam temperature and the main steam flow rate is equal to the standard main steam flow rate. The power equipment 204 uses the main steam with the main steam temperature equal to the target main steam temperature and the main steam flow rate equal to the target main steam flow rate to drive the generator 205 to generate electricity.

[0117] If the main steam flow rate is greater than the standard main steam flow rate, regardless of whether the main steam temperature is less than, equal to, or greater than the standard main steam temperature, the exhaust valve will be opened after a time delay until the main steam flow rate equals the standard main steam flow rate. If the main steam temperature is less than the standard steam temperature, the main steam will be heated to the standard main steam temperature. If the main steam temperature is greater than the standard steam temperature, the desuperheating water valve will be opened until the main steam temperature equals the standard main steam temperature. The power equipment 204 uses the main steam with a main steam temperature equal to the target main steam temperature and a main steam flow rate equal to the target main steam flow rate to drive the generator 205 to generate electricity.

[0118] The main steam generated by the steam production unit 202 will produce corresponding flue gas after entering the combustion supplement unit 203. The combustion supplement unit 203 can input the generated flue gas into the flue gas direct combustion engine 206, and the flue gas direct combustion engine 105 can draw gas with a second gas value that has been pre-stored from the storage device 202, and convert the drawn gas into flue gas through the gas pipeline before entering the flue gas direct combustion engine, so that the flue gas direct combustion engine 206 can use the flue gas generated by the combustion supplement unit 203 and the flue gas converted from the second gas value gas drawn from the combustion supplement unit 203 through the gas pipeline to provide cooling or heating for the plant area.

[0119] In this embodiment, the power equipment 204 drives the generator to generate electricity, which can be used for the plant's electrical load, electric cooling, electric heating, or grid connection.

[0120] Optionally, the first output end of the afterburning device 203 is connected to the input end of the power equipment via a steam pipe;

[0121] Optionally, in the above-mentioned coupled energy supply system, the combustion device 203 includes a heating device and a storage device.

[0122] Specifically, the output end of the steam generating device is connected to the first input end of the heating device; wherein, the first input end of the heating device is the first input end of the combustion supplement device;

[0123] The second input terminal of the heating device is connected to the first output terminal of the storage device, and the first output terminal of the heating device is connected to the output terminal of the power equipment; wherein, the first output terminal of the heating device is the first output terminal of the combustion supplement device;

[0124] The first input end of the flue gas direct combustion engine is connected to the second output end of the heating device, and the second input end of the flue gas direct combustion engine is connected to the second output end of the storage device; wherein, the second output end of the heating device is the second output end of the supplementary combustion device, and the second output end of the storage device is the third output end of the supplementary combustion device.

[0125] Optionally, the storage device includes: gasification equipment, purification equipment, and gas storage equipment;

[0126] Specifically, the gasification equipment receives the required amount of biomass at its input end, and its output end is connected to the input end of the purification equipment; wherein, the input end of the gasification equipment is the second input end of the combustion supplement device; the output end of the purification equipment is connected to the input end of the gas storage device, and the first output end of the gas storage device is connected to the second input end of the heating device; wherein, the first output end of the gas storage tank is the first output end of the storage device; the second output end of the gas storage device is connected to the second input end of the flue gas direct combustion engine; wherein, the second output end of the gas storage device is the second output end of the storage device.

[0127] In a preferred embodiment of this application, the steam generating device 202 can be a waste heat boiler, the power equipment 204 can be a steam turbine, the gasification equipment can be a gasifier, and the gas storage equipment can be a gas storage tank. The selection can be made according to the actual application, and this application embodiment does not limit the choice.

[0128] like Figure 3 As shown, the waste heat boiler receives waste heat at its input end, and its output end is connected to the first input end of the supplementary combustion boiler. The waste heat boiler processes the input waste heat to generate corresponding high-temperature main steam, and then inputs the generated main steam into the supplementary combustion boiler.

[0129] Meanwhile, the processor executes the energy supply regulation method provided in this application to determine the amount of biomass required to be fed into the combustion device, and the processor captures the required amount of biomass through a preset method and feeds it into the gasifier through the input end of the gasifier; the output end of the gasifier is connected to the input end of the purification equipment, and the output end of the purification equipment is connected to the input end of the gas storage tank. The gasifier gasifies the fed biomass to generate corresponding gas, and the purification equipment transmits the generated gas to the gas storage tank for storage.

[0130] The output end of the gas storage tank is connected to the second input end of the supplementary combustion boiler, and the first output end of the supplementary combustion boiler is connected to the input end of the steam turbine through a steam pipe; the output end of the steam turbine is connected to the target equipment.

[0131] The supplementary combustion boiler can determine whether the main steam flow rate and temperature are equal to the standard main steam flow rate and temperature. If the main steam flow rate and temperature are both lower than the standard main steam flow rate and temperature, the supplementary combustion boiler can switch to parallel operation mode after a time delay. This means that the ambient temperature feedwater pump valve is opened, outputting a preset flow rate of ambient temperature feedwater, and a portion of the feedwater heated by gas from the gas storage tank is drawn to the first preset temperature. This ensures that both the steam flow rate and the main steam flow rate reach the standard main steam flow rate and temperature. The steam and main steam are then fed into the steam turbine through steam pipes, which in turn drives a generator to produce electricity. The preset flow rate is the difference between the main steam flow rate and the target main steam flow rate.

[0132] If the main steam flow rate is less than the standard main steam flow rate and the main steam temperature is greater than the standard main steam temperature, the supplementary combustion boiler can switch to parallel operation mode after a time delay. That is, the supplementary combustion boiler opens the valve of the ambient temperature feedwater pump, outputs ambient temperature feedwater at a preset flow rate, and draws part of the ambient temperature feedwater from the gas storage tank to heat the output of the gas-fired pump to the second preset temperature, so that the steam flow rate and the main steam flow rate reach the standard main steam flow rate, and the steam temperature and the main steam temperature reach the standard main steam temperature. The steam and main steam are then fed into the steam turbine through the steam pipeline, and the steam turbine uses the steam and main steam to drive the generator to generate electricity.

[0133] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is less than the standard main steam temperature, the supplementary combustion boiler draws some gas from the gas storage tank to heat the main steam to the standard main steam temperature. The heated main steam is then fed into the steam turbine through the steam pipeline, and the steam turbine uses the heated main steam to drive the generator to generate electricity.

[0134] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is equal to the standard main steam temperature, the supplementary combustion boiler can switch to series function mode after a time delay. That is, the main steam is input into the steam turbine through the steam pipeline, and the steam turbine uses the main steam to drive the generator to generate electricity.

[0135] If the main steam flow rate is equal to the standard main steam flow rate and the main steam temperature is greater than the standard main steam temperature, the waste heat boiler is controlled to open the desuperheating water valve until the main steam temperature and the main steam flow rate are equal to the standard main steam temperature and the standard main steam flow rate. The main steam with the same temperature and flow rate is then fed into the steam turbine through the steam pipeline. The steam turbine uses the main steam with the same temperature and flow rate to drive the generator to generate electricity.

[0136] If the main steam flow rate is greater than the standard main steam flow rate, regardless of whether the main steam temperature is less than, equal to, or greater than the standard main steam temperature, the exhaust valve is opened after a time delay until the main steam flow rate equals the standard main steam flow rate. If the main steam temperature is less than the standard steam temperature, the main steam is heated to the standard main steam temperature. If the main steam temperature is greater than the standard steam temperature, the desuperheating water valve is opened until the main steam temperature equals the standard main steam temperature. The main steam with the standard main steam temperature and flow rate are then fed into the steam turbine through the steam pipeline. The steam turbine uses the main steam with the standard main steam temperature and flow rate to drive the generator to generate electricity.

[0137] The first input terminal of the flue gas direct-fired turbine is connected to the second output terminal of the supplementary combustion boiler, and the second input terminal of the flue gas direct-fired turbine is connected to the second output terminal of the gas storage tank. The main steam generated by the waste heat boiler produces corresponding flue gas after entering the supplementary combustion boiler, which can be input into the flue gas direct-fired turbine. At the same time, the flue gas direct-fired turbine can draw pre-stored second-value gas from the gas storage tank, and convert the drawn gas into flue gas through the gas pipeline before entering the flue gas direct-fired turbine. This allows the flue gas direct-fired turbine to use the input flue gas and the flue gas converted from the second-value gas from the gas storage tank through the gas pipeline to provide cooling or heating for the plant area.

[0138] Similar or identical parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for system or system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and relevant parts can be referred to the description of the method embodiments. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment solution according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0139] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0140] The features described above regarding the disclosed embodiments can be substituted for or combined with each other to enable those skilled in the art to implement or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for energy conditioning, characterized in that, The method comprises: determining the waste heat power generation according to the steam generation device heat rate, system heat utilization efficiency, unit clinker heat consumption and clinker production plan; determining the heat required in the target period by using the waste heat power generation; determining the first gas quantity according to the heat required in the target period; accumulating the cold / heat load short-term prediction value to obtain the heat production required in the target period; determining the second gas quantity according to the heat production required in the target period; estimating the demand quantity of biomass in the target period according to the first gas quantity and the second gas quantity, so that the coupling energy supply system receives the demand quantity of biomass, generates gas by using the received biomass, and carries out combustion power generation.

2. The method of claim 1, wherein, The determination of the waste heat power generation according to the steam generation device heat rate, system heat utilization efficiency, unit clinker heat consumption and clinker production plan comprises: multiplying the steam generation device heat rate and the system heat utilization efficiency to obtain the total efficiency; determining the clinker demand quantity from the clinker production plan; multiplying the preset target coefficient, the clinker demand quantity, the unit clinker heat consumption and the total efficiency to obtain the waste heat power generation.

3. The method of claim 1, wherein, The determination of the heat required in the target period by using the waste heat power generation comprises: calculating the difference between the waste heat power generation and the generator set design power; accumulating the difference based on the accumulation time to obtain the waste heat power generation required in the target period; wherein the accumulation time is determined according to the target period; converting the waste heat power generation according to the electric heat conversion coefficient to obtain the heat required in the target period.

4. The method of claim 1, wherein, The determination of the first gas quantity according to the heat required in the target period comprises: calculating the first gas quantity according to the heat required in the target period and the unit biomass gas heat value.

5. The method of claim 1, wherein, The accumulation of the cold / heat load short-term prediction value to obtain the heat production required in the target period comprises: accumulating the cold / heat load short-term prediction value based on the accumulation time to obtain the heat production required in the target period, wherein the accumulation time is determined according to the target period.

6. The method of claim 1, wherein, The determination of the second gas quantity according to the heat production in the target period comprises: calculating the second gas quantity according to the heat production in the target period and the unit biomass gas heat value.

7. The method of claim 1, wherein, The estimation of the demand quantity of biomass in the target period according to the first gas quantity and the second gas quantity comprises: determining the first demand quantity of biomass according to the first gas quantity and the unit biomass gas production quantity; determining the second demand quantity of biomass according to the second gas quantity and the unit biomass gas production quantity; summing the first demand quantity and the second demand quantity to obtain the demand quantity of biomass in the target period.

8. The method of claim 1, wherein, The cold / heat load short-term prediction value is obtained by using the target cold / heat load power data and the target meteorological data through the cold / heat load short-term value prediction model. The cold / heat load short-term value prediction model is obtained by training the neural network by using the historical cold / heat load power data and the historical meteorological data.

9. A coupled power supply system, characterized by, It comprises: a processor, a steam generation device, a supplementary combustion device, a power equipment, a generator and a flue gas direct combustion machine; The processor is configured to determine the required amount of biomass to be input into the supplemental combustor using the energy adjustment method of any one of claims 1-8. An input of the steam generator receives waste heat, and an output of the steam generator is connected to a first input of the supplemental combustor. A second input of the supplemental combustor receives the required amount of biomass, a first output of the supplemental combustor is connected to an input of the power device, and an output of the power device is connected to an input of the generator. A first input of the flue gas direct combustion machine is connected to a second output of the supplemental combustor, and a second input of the flue gas direct combustion machine is connected to a third output of the supplemental combustor.

10. The coupled power supply system of claim 9, wherein, The supplemental combustor comprises a heating device and a storage device. An output of the steam generator is connected to a first input of the heating device, and the first input of the heating device is the first input of the supplemental combustor. A second input of the heating device is connected to a first output of the storage device, and a first output of the heating device is connected to an output of the power device, and the first output of the heating device is the first output of the supplemental combustor. A first input of the flue gas direct combustion machine is connected to a second output of the heating device, and a second input of the flue gas direct combustion machine is connected to a second output of the storage device, and the second output of the heating device is the second output of the supplemental combustor, and the second output of the storage device is the third output of the supplemental combustor.

11. The coupled power supply system of claim 10, wherein, The storage device comprises a gasification device, a purification device, and a gas storage device. An input of the gasification device receives the required amount of biomass, and an output of the gasification device is connected to an input of the purification device, and the input of the gasification device is the second input of the supplemental combustor. An output of the purification device is connected to an input of the gas storage device, a first output of the gas storage device is connected to a second input of the heating device, and the first output of the gas storage device is the first output of the storage device. A second output of the gas storage device is connected to a second input of the flue gas direct combustion machine, and the second output of the gas storage device is the second output of the storage device.

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