Generator set deep peak shaving system and method

Abstract

The application provides a generator set deep peak regulation system and method, wherein the generator set deep peak regulation system comprises a gas turbine power generation unit, a waste heat boiler, an economizer and an SCR denitration device; the gas turbine power generation unit is suitable for forming high-temperature flue gas and generating power through the high-temperature flue gas; the waste heat boiler is suitable for recovering heat in tail flue gas of the gas turbine power generation unit; the economizer is suitable for recovering heat in tail flue gas of the waste heat boiler; and the SCR denitration device is suitable for removing nitrogen in tail flue gas of the economizer; wherein the economizer has a flue gas bypass which is in communication with the gas turbine power generation unit and is suitable for mixing tail flue gas of the gas turbine power generation unit with inlet flue gas of the SCR denitration device to adjust the inlet flue gas temperature of the SCR denitration device. According to the above scheme, the problem that the water power safety and efficiency of the boiler are reduced due to the reduced heat exchange of the economizer in the existing generator set deep peak regulation process can be solved.

Description

Technical Field

[0001] This application relates to the field of power generation technology, and more specifically, to a deep peak-shaving system and method for generator sets. Background Technology

[0002] Currently, due to the increase in installed capacity of new energy power generation, most generating units require deep peak shaving. However, during deep peak shaving of coal-fired units, the low flue gas temperature leads to excessively low SCR temperature, which not only reduces denitrification efficiency but also causes catalyst poisoning. Therefore, many power plants have carried out wide-load denitrification retrofits, and a common technical modification method is to add a flue gas bypass. The principle of this technology is to extract the high-temperature flue gas before the economizer and mix it with the flue gas before the SCR, thereby controlling the flue gas temperature at the SCR inlet. However, this approach has the problem of reduced heat exchange at the economizer, which not only affects the boiler's hydrodynamic safety but also reduces boiler efficiency. Summary of the Invention

[0003] This application provides at least one deep peak shaving system and method for generator sets to improve the problem of reduced boiler hydrodynamic safety and efficiency caused by reduced economizer heat exchange during the deep peak shaving process of existing generator sets.

[0004] In a first aspect, embodiments of this application provide a deep peak-shaving system for a generator set, including: a gas turbine power generation unit, a waste heat boiler, an economizer, and an SCR denitrification device;

[0005] The gas turbine power generation unit is adapted to generate high-temperature flue gas through combustion and to generate electricity through the high-temperature flue gas.

[0006] The waste heat boiler is connected to the flue gas outlet of the gas turbine power generation unit and is suitable for recovering heat from the flue gas at the tail end of the gas turbine power generation unit.

[0007] The economizer is connected to the flue gas outlet of the waste heat boiler and is suitable for recovering heat from the flue gas at the tail end of the waste heat boiler.

[0008] The SCR denitrification device is connected to the flue gas outlet of the economizer and is suitable for removing nitrates from the tail flue gas of the economizer.

[0009] The economizer has a flue gas bypass that is connected to the flue gas outlet of the gas turbine power generation unit, which is suitable for mixing the tail flue gas of the gas turbine power generation unit with the tail flue gas of the economizer to adjust the inlet flue gas temperature of the SCR denitrification device.

[0010] In one alternative embodiment, a valve assembly is provided on the flue gas bypass, the valve assembly being adapted to allow flue gas from the tail end of the gas turbine power generation unit to enter the flue gas bypass.

[0011] In one optional implementation, it further includes: an exhaust gas emission unit;

[0012] The exhaust gas emission unit is connected to the flue gas outlet of the SCR denitrification device and is suitable for emitting the tail flue gas of the SCR denitrification device.

[0013] In one alternative embodiment, the exhaust emission unit includes a dust collector, a fan, and a chimney;

[0014] The dust collector is connected to the SCR denitrification device and is suitable for removing dust from the flue gas at the tail end of the SCR denitrification device.

[0015] The fan is connected to the dust collector and is adapted to draw the dust-collected flue gas into the chimney so that the chimney can discharge the dust-collected flue gas into the atmosphere.

[0016] In one optional implementation, it further includes: an energy storage unit;

[0017] The energy storage unit is connected to the feed inlet of the gas turbine power generation unit and is suitable for storing metal energy and converting the metal into fuel required by the gas turbine power generation unit.

[0018] In one alternative implementation, the energy storage unit stores energy in the form of aluminum.

[0019] In one optional embodiment, the energy storage unit includes an alumina electrolytic cell, a condenser, an aluminum particle storage tank, an oxygen storage tank, a water storage tank, a crusher, and an aluminum powder storage tank.

[0020] The alumina electrolytic cell is suitable for electrolyzing alumina to form a water-oxygen mixture and aluminum particles.

[0021] The condenser is connected to the alumina electrolytic cell and is suitable for condensing the moisture in the water-oxygen mixed gas.

[0022] The oxygen storage device is connected to the condenser and is suitable for storing oxygen;

[0023] The water storage tank is connected to the condenser and is suitable for storing water;

[0024] The aluminum particle storage device is connected to the alumina electrolytic cell and is suitable for storing aluminum particles;

[0025] The crusher is connected to the aluminum particle storage container and is suitable for crushing aluminum particles to form aluminum powder.

[0026] The aluminum powder storage device is connected to the crusher and is suitable for storing aluminum powder.

[0027] In one alternative embodiment, the energy storage unit further includes a reactor and a hydrogen-water separator;

[0028] The reactor is connected to the outlet of the aluminum powder storage tank, and is suitable for reacting the aluminum powder to produce a hydrogen-water mixed gas.

[0029] The hydrogen-water separator is connected to both the reactor and the gas turbine power generation unit, and is adapted to separate hydrogen from the hydrogen-water mixture and send the hydrogen into the gas turbine power generation unit.

[0030] In one alternative embodiment, the hydrogen-water separator is also connected to the water storage tank.

[0031] Secondly, embodiments of this application also provide a method for deep peak shaving of generator sets, applicable to the deep peak shaving system of generator sets described in any of the first aspects, comprising the following steps:

[0032] Step S1: The flue gas from the tail end of the gas turbine power generation unit is transported to the waste heat boiler for heat exchange;

[0033] Step S2: The flue gas from the tail end of the waste heat boiler is transported to the economizer for heat exchange;

[0034] Step S3: Mix the flue gas from the economizer tail end and the flue gas from the gas turbine power generation unit tail end and send them to the SCR denitrification device for denitrification.

[0035] The above-mentioned technical solution of this application has the following beneficial technical effects:

[0036] In the above process, since the temperature of the flue gas at the tail end of the gas turbine power generation unit is relatively high, mixing the flue gas from the gas turbine power generation unit with the flue gas from the economizer tail end can effectively increase the inlet flue gas temperature of the SCR denitrification device. This avoids the problems of reduced denitrification efficiency and catalyst poisoning caused by excessively low flue gas temperature. Furthermore, compared to mixing the inlet flue gas from the economizer with the tail flue gas from the economizer, mixing the flue gas from the gas turbine power generation unit with the tail flue gas from the economizer tail end also prevents the flue gas from being diverted from the economizer inlet. This increases the heat exchange capacity of the economizer, thereby improving the hydraulic safety and efficiency of the boiler.

[0037] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this application and, together with the specification, serve to explain the technical solutions of this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0039] Figure 1 This paper shows a schematic diagram of the structure of a deep peak-shaving system for a generator set provided in an embodiment of this application;

[0040] Figure label:

[0041] 1. Gas turbine power generation unit; 2. Waste heat boiler; 3. Economizer; 4. SCR denitrification device; 5. Flue gas bypass; 6. Dust collector; 7. Fan; 8. Chimney; 9. Alumina electrolytic cell; 10. Condenser; 11. Aluminum particle storage tank; 12. Oxygen storage tank; 13. Water storage tank; 14. Crusher; 15. Aluminum powder storage tank; 16. Reactor; 17. Hydrogen-water separator. Detailed Implementation

[0042] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of this specification should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0043] Currently, due to the increase in installed capacity of new energy power generation, most generating units require deep peak shaving. However, during deep peak shaving of coal-fired units, the low flue gas temperature leads to excessively low SCR temperature, which not only reduces denitrification efficiency but also causes catalyst poisoning. Therefore, many power plants have carried out wide-load denitrification retrofits, and a common technical modification method is to add a flue gas bypass. The principle of this technology is to extract the high-temperature flue gas before the economizer and mix it with the flue gas before the SCR, thereby controlling the flue gas temperature at the SCR inlet. However, this approach has the problem of reduced heat exchange at the economizer, which not only affects the boiler's hydrodynamic safety but also reduces boiler efficiency.

[0044] Therefore, this application provides a deep peak shaving system and method for generator sets to improve the problem of reduced boiler hydrodynamic safety and efficiency caused by reduced economizer heat exchange during the deep peak shaving process of existing generator sets.

[0045] To make the objectives, technical solutions, and advantages of this application clearer, they will be described in detail below with reference to specific drawings and embodiments.

[0046] Reference Figure 1 , Figure 1 A schematic diagram of the structure of a generator set deep peak shaving system provided in an embodiment of this application is shown.

[0047] The deep peak-shaving system for generator sets provided in this application includes: a gas turbine power generation unit 1, a waste heat boiler 2, an economizer 3, and an SCR denitrification device 4. The gas turbine power generation unit 1 is adapted to generate high-temperature flue gas through combustion and to generate electricity using the high-temperature flue gas. The waste heat boiler 2 is connected to the flue gas outlet of the gas turbine power generation unit 1 and is adapted to recover heat from the tail flue gas of the gas turbine power generation unit 1. The economizer 3 is connected to the flue gas outlet of the waste heat boiler 2 and is adapted to recover heat from the tail flue gas of the waste heat boiler 2. The SCR denitrification device 4 is connected to the flue gas outlet of the economizer 3 and is adapted to remove nitrates from the tail flue gas of the economizer 3. The economizer 3 has a flue gas bypass 5, which is connected to the flue gas outlet of the gas turbine power generation unit 1 and is adapted to mix the tail flue gas of the gas turbine power generation unit 1 with the tail flue gas of the economizer 3 to adjust the inlet flue gas temperature of the SCR denitrification device 4.

[0048] During operation, the high-temperature flue gas from the gas turbine power generation unit 1 generates electricity and is then divided into two streams. One stream of flue gas passes through the waste heat boiler 2 and the economizer 3 for heat exchange, while the other stream of flue gas passes through the flue gas bypass 5 of the economizer 3 and mixes with the flue gas from the economizer 3. The mixed flue gas is then transported to the SCR denitrification device 4 for denitrification.

[0049] In the above process, since the temperature of the flue gas at the tail end of the gas turbine power generation unit 1 is relatively high, mixing the flue gas at the tail end of the gas turbine power generation unit 1 with the flue gas at the tail end of the economizer 3 can effectively increase the inlet flue gas temperature of the SCR denitrification device 4, thereby avoiding the problems of reduced denitrification efficiency and catalyst poisoning caused by excessively low flue gas temperature. Furthermore, compared to mixing the inlet flue gas of the economizer 3 with the tail flue gas of the economizer 3, mixing the flue gas at the tail end of the gas turbine power generation unit 1 with the tail flue gas of the economizer 3 can also prevent the flue gas from being diverted from the inlet of the economizer 3. This can improve the heat exchange capacity of the economizer 3, thereby improving the hydraulic safety and efficiency of the boiler.

[0050] It should be noted that in related technologies, the function of the flue gas bypass 5 is to divert the inlet flue gas of the economizer 3 so that the diverted flue gas mixes with the tail flue gas of the economizer 3, thereby controlling the inlet flue gas temperature of the SCR denitrification device 4. However, this may lead to a reduction in the heat exchange at the economizer 3, which will not only affect the hydrodynamic safety of the boiler but also reduce the boiler efficiency. Therefore, in this embodiment, the flue gas bypass 5 is connected to the flue gas outlet of the gas turbine power generation unit 1. In this way, the tail flue gas of the gas turbine power generation unit 1 can replace the inlet flue gas of the economizer 3, and the above-mentioned technical effect can be obtained after the tail flue gas of the gas turbine power generation unit 1 mixes with the tail flue gas of the economizer 3.

[0051] It should be understood that, in the embodiments of this application, under the condition of meeting the boiler's safe operation requirements, the inlet flue gas of the economizer 3 can be appropriately diverted to mix the tail flue gas of the economizer 3 with the inlet flue gas of the economizer 3. Specifically, under the condition of meeting the boiler's safe operation requirements, the tail flue gas of the economizer 3 can be mixed only with the tail flue gas of the gas turbine power generation unit 1, or it can be mixed with both the inlet flue gas of the economizer 3 and the tail flue gas of the gas turbine power generation unit 1.

[0052] Optionally, in this embodiment, a valve group is provided on the flue gas bypass 5, which is adapted to allow the flue gas from the tail of the gas turbine power generation unit 1 to enter the flue gas bypass 5. In this way, the flue gas from the tail of the gas turbine power generation unit 1 can be mixed with the flue gas from the tail of the economizer 3 to control the inlet flue gas temperature of the SCR denitrification device 4.

[0053] For example, the valve group includes a first valve and a second valve. The first valve is located near the flue gas outlet of the flue gas bypass 5 (downstream of the flue gas outlet at the tail end of the gas turbine power generation unit 1), and the second valve is located near the flue gas inlet of the flue gas bypass 5 (upstream of the flue gas outlet at the tail end of the gas turbine power generation unit 1). During operation, if the first valve is opened and the second valve is closed, only the flue gas from the tail end of the gas turbine power generation unit 1 mixes with the flue gas from the tail end of the economizer 3, thus preventing a reduction in the heat exchange capacity of the economizer 3. If both the first and second valves are opened simultaneously, the inlet flue gas of the economizer 3 and the tail flue gas of the gas turbine power generation unit 1 can mix simultaneously with the tail flue gas of the economizer 3, thus meeting the boiler's safe operation requirements. In specific implementations, the valve group opening method can be selected according to the actual situation.

[0054] Optionally, in this embodiment, the generator set deep peak shaving system further includes: an exhaust gas emission unit, which is connected to the flue gas outlet of the SCR denitrification device 4 and is suitable for emitting the tail flue gas of the SCR denitrification device 4. This enables the emission of exhaust gas.

[0055] refer to Figure 1 For example, the exhaust gas emission unit includes a dust collector 6, a fan 7, and a chimney 8. The inlet of the dust collector 6 is connected to the flue gas outlet of the SCR denitrification device 4. The dust collector 6 is adapted to remove dust from the flue gas passing through the tail end of the SCR denitrification device 4, forming dust-collected flue gas. The inlet of the fan 7 is connected to the outlet of the dust collector 6, and the outlet of the fan 7 is connected to the inlet of the chimney 8. The fan 7 is adapted to draw the dust-collected flue gas into the chimney 8, so that the chimney 8 discharges the dust-collected flue gas into the atmosphere. Specifically, during use, the exhaust gas emission unit can remove dust from the flue gas before it is emitted, thus achieving green emissions of the flue gas.

[0056] Optionally, in this embodiment of the application, the generator set deep peak shaving system further includes: an energy storage unit, which is connected to the feed inlet of the gas turbine power generation unit 1 and is suitable for storing metal energy and converting the metal into fuel required by the gas turbine power generation unit 1.

[0057] Preferably, the energy storage unit can store energy in the form of aluminum. Aluminum fuel has the advantages of wide mining coverage and abundant crustal reserves. Hydrogen can be produced by reacting metallic aluminum fuel with water, and the hydrogen can be burned in a gas turbine to generate electricity. Gas turbine power generation can not only rapidly adjust loads but also reduce carbon emissions.

[0058] refer to Figure 1For example, the energy storage unit includes an alumina electrolytic cell 9, a condenser 10, an aluminum particle storage tank 11, an oxygen storage tank 12, a water storage tank 13, a pulverizer 14, and an aluminum powder storage tank 15. The alumina electrolytic cell 9 is adapted to electrolyze alumina to form a water-oxygen mixture and aluminum particles. The inlet of the condenser 10 is connected to the outlet of the alumina electrolytic cell 9, and is adapted to condense moisture in the water-oxygen mixture. The inlet of the oxygen storage tank 12 is connected to the outlet of the condenser 10, and is adapted to store oxygen. The inlet of the water storage tank 13 is connected to the outlet of the condenser 10, and is adapted to store condensate. The inlet of the aluminum particle storage tank 11 is connected to the outlet of the alumina electrolytic cell 9, and is adapted to store aluminum particles. The inlet of the pulverizer 14 is connected to the outlet of the aluminum particle storage tank 11, and is adapted to pulverize the aluminum particles to form aluminum powder. The inlet of the aluminum powder storage unit 15 is connected to the outlet of the crusher 14, making it suitable for storing aluminum powder. Specifically, during use, the energy storage unit processes alumina into aluminum powder through a series of devices, thereby storing energy in the form of aluminum powder.

[0059] Furthermore, the energy storage unit can not only store energy in the form of aluminum during the energy storage process, but also generate and store oxygen. On the one hand, the stored oxygen can be used as a chemical product; on the other hand, it can be used as a combustion aid to improve boiler combustion efficiency. Moreover, the energy storage unit can also collect and store water during the energy storage process, thus saving a significant amount of water resources and contributing to environmental protection.

[0060] In practice, the electricity required for alumina electrolysis can be generated by solar or wind power. This reduces dependence on traditional fossil fuels such as coal, oil, and natural gas, helping to mitigate environmental pollution and climate change issues, and alleviating energy supply pressures and security risks. Furthermore, the reduced use of traditional fossil fuels also lowers carbon emissions, achieving a win-win situation for economic development and environmental protection.

[0061] It should be noted that the electricity generated by solar or wind power can be surplus power generated when there is an overcapacity. This saves energy and avoids energy waste.

[0062] refer to Figure 1For example, the energy storage unit also includes a reactor 16 and a hydrogen-water separator 17. The inlet of the reactor 16 is connected to the outlet of the aluminum powder storage tank 15, suitable for reacting the aluminum powder to produce a hydrogen-water mixture. The inlet of the hydrogen-water separator 17 is connected to the outlet of the reactor 16, and the outlet of the hydrogen-water separator 17 is connected to the inlet of the gas turbine power generation unit 1, suitable for separating hydrogen from the hydrogen-water mixture and feeding the hydrogen into the gas turbine power generation unit 1. Specifically, during operation, the energy storage unit converts metal into fuel required by the gas turbine power generation unit 1 by reacting aluminum powder with water to produce hydrogen.

[0063] In a specific configuration, the hydrogen-water separator 17 is also connected to the water storage tank 13, such as... Figure 1 As shown. Specifically, the outlet of the hydrogen-water separator 17 is connected to the inlet of the water storage tank 13. In this way, the separated water can be stored in the water storage tank 13 to avoid waste of water resources.

[0064] Based on the same technical concept, this application also provides a method for deep peak shaving of generator sets, which is applicable to the deep peak shaving system of generator sets in any of the foregoing embodiments, and includes the following steps:

[0065] Step S1: The tail flue gas of the gas turbine power generation unit 1 is transported to the waste heat boiler 2 for heat exchange;

[0066] Step S2: The tail flue gas of the waste heat boiler 2 is transported to the economizer 3 for heat exchange;

[0067] Step S3: Mix the tail flue gas of economizer 3 and tail flue gas of gas turbine power generation unit 1 and send them to SCR denitrification device 4 for denitrification.

[0068] According to the above scheme, since the temperature of the flue gas at the tail end of the gas turbine power generation unit 1 is relatively high, mixing the flue gas at the tail end of the gas turbine power generation unit 1 with the flue gas at the tail end of the economizer 3 can effectively increase the inlet flue gas temperature of the SCR denitrification device 4, thereby avoiding the problems of reduced denitrification efficiency and catalyst poisoning caused by excessively low flue gas temperature. Furthermore, compared to mixing the inlet flue gas of the economizer 3 with the tail flue gas of the economizer 3, mixing the flue gas at the tail end of the gas turbine power generation unit 1 with the tail flue gas of the economizer 3 can also prevent the flue gas from being diverted from the inlet of the economizer 3. This can improve the heat exchange capacity of the economizer 3, thereby improving the hydraulic safety and efficiency of the boiler.

[0069] One or more embodiments in this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this specification should be included within the protection scope of this application.

[0070] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A deep peak-shaving system for generator sets, characterized in that, include: Gas turbine power generation unit, waste heat boiler, economizer and SCR denitrification device; The gas turbine power generation unit is adapted to generate high-temperature flue gas through combustion and to generate electricity through the high-temperature flue gas. The waste heat boiler is connected to the flue gas outlet of the gas turbine power generation unit and is suitable for recovering heat from the flue gas at the tail end of the gas turbine power generation unit. The economizer is connected to the flue gas outlet of the waste heat boiler and is suitable for recovering heat from the flue gas at the tail end of the waste heat boiler. The SCR denitrification device is connected to the flue gas outlet of the economizer and is suitable for removing nitrates from the tail flue gas of the economizer. The economizer has a flue gas bypass that is connected to the flue gas outlet of the gas turbine power generation unit, which is suitable for mixing the tail flue gas of the gas turbine power generation unit with the tail flue gas of the economizer to adjust the inlet flue gas temperature of the SCR denitrification device.

2. The generator set deep peak shaving system according to claim 1, characterized in that, A valve assembly is provided on the flue gas bypass, and the valve assembly is adapted to allow the flue gas from the tail end of the gas turbine power generation unit to enter the flue gas bypass.

3. The generator set deep peak-shaving system according to claim 1, characterized in that, Also includes: Exhaust emission unit; The exhaust gas emission unit is connected to the flue gas outlet of the SCR denitrification device and is suitable for emitting the tail flue gas of the SCR denitrification device.

4. The generator set deep peak-shaving system according to claim 3, characterized in that, The exhaust gas emission unit includes a dust collector, a fan, and a chimney; The dust collector is connected to the SCR denitrification device and is suitable for removing dust from the flue gas at the tail end of the SCR denitrification device. The fan is connected to the dust collector and is adapted to draw the dust-collected flue gas into the chimney so that the chimney can discharge the dust-collected flue gas into the atmosphere.

5. The generator set deep peak shaving system according to claim 1, characterized in that, Also includes: Energy storage unit; The energy storage unit is connected to the feed inlet of the gas turbine power generation unit and is suitable for storing metal energy and converting the metal into fuel required by the gas turbine power generation unit.

6. The generator set deep peak-shaving system according to claim 5, characterized in that, The energy storage unit stores energy in the form of aluminum.

7. The generator set deep peak-shaving system according to claim 6, characterized in that, The energy storage unit includes an alumina electrolytic cell, a condenser, an aluminum particle storage tank, an oxygen storage tank, a water storage tank, a crusher, and an aluminum powder storage tank. The alumina electrolytic cell is suitable for electrolyzing alumina to form a water-oxygen mixture and aluminum particles. The condenser is connected to the alumina electrolytic cell and is suitable for condensing the moisture in the water-oxygen mixed gas. The oxygen storage device is connected to the condenser and is suitable for storing oxygen; The water storage tank is connected to the condenser and is suitable for storing water; The aluminum particle storage device is connected to the alumina electrolytic cell and is suitable for storing aluminum particles; The crusher is connected to the aluminum particle storage container and is suitable for crushing aluminum particles to form aluminum powder. The aluminum powder storage device is connected to the crusher and is suitable for storing aluminum powder.

8. The generator set deep peak shaving system according to claim 7, characterized in that, The energy storage unit also includes a reactor and a hydrogen-water separator; The reactor is connected to the outlet of the aluminum powder storage tank, and is suitable for reacting the aluminum powder to produce a hydrogen-water mixed gas. The hydrogen-water separator is connected to both the reactor and the gas turbine power generation unit, and is adapted to separate hydrogen from the hydrogen-water mixture and send the hydrogen into the gas turbine power generation unit.

9. The generator set deep peak-shaving system according to claim 8, characterized in that, The hydrogen-water separator is also connected to the water storage tank.

10. A method for deep peak shaving of a generator set, applicable to the deep peak shaving system of the generator set as described in any one of claims 1-9, characterized in that, Includes the following steps: Step S1: The flue gas from the tail end of the gas turbine power generation unit is transported to the waste heat boiler for heat exchange; Step S2: The flue gas from the tail end of the waste heat boiler is transported to the economizer for heat exchange; Step S3: Mix the flue gas from the economizer tail end and the flue gas from the gas turbine power generation unit tail end and send them to the SCR denitrification device for denitrification.

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