Steam supply system and steam supply method

Abstract

This application belongs to the field of aerospace testing technology and discloses a steam supply system and steam supply method. The steam supply system includes a steam generator system, an alcohol supply system, a liquid oxygen supply system, a softened water supply system, and a control system. The steam generator system includes steam generator units arranged in parallel, each steam generator unit including three steam generators. Steam branch lines are equipped with steam regulating valves, and steam supply pipelines are connected to venting pipelines, which are equipped with steam venting valves. An alcohol main valve is provided between the alcohol supply system and each steam generator; a liquid oxygen main valve is provided between the liquid oxygen supply system and each steam generator; and a water main valve is provided between the softened water supply system and each steam generator. The adjustment method provided in this application is more flexible, enabling rapid and accurate changes in steam flow rate according to actual needs, and allowing for step-by-step adjustment of steam flow rate.

Description

Technical Field

[0001] This invention relates to the field of aerospace testing technology, and in particular to a steam supply system and steam supply method. Background Technology

[0002] Steam ejectors are widely used as exhaust extraction devices in high-altitude simulation tests of aero-engines to extract air from the cabin at high altitudes. To meet the test requirements of simulating different predetermined altitude environments, a wide range of variable flow rates and long-term high-energy ejector steam supply is needed. Furthermore, while domestically designed steam supply systems currently possess flow rate adjustment capabilities, a rough baseline flow rate needs to be determined before each test. During exhaust ejection, flow rate can only be fine-tuned through the steam supply pipeline, making it impossible to significantly change the steam flow rate during the test. This makes it difficult to meet the stage-by-stage start-up requirements of multi-stage combined steam ejectors.

[0003] Secondly, the steam source used in traditional steam ejectors is generally based on a boiler or steam generator. Boilers can meet the long-term supply of variable small-flow steam, but the use of boiler thermal storage systems has inherent defects in terms of capacity, cost, site, and test preparation. It is difficult to solve the contradiction between multiple starts, long continuous working time, and large flow. In addition, boiler systems mostly use fuels with high carbon and sulfur content, such as coal, as the combustion medium, and the resulting fuel composition can have adverse effects on the environment.

[0004] Therefore, there is an urgent need for a steam supply system and steam supply method to solve the above problems. Summary of the Invention

[0005] One aspect of this application provides a steam supply system to solve the technical problem of not being able to change the steam flow rate in a large gradient.

[0006] Another aspect of this application provides a steam supply method that offers high flexibility.

[0007] Based on the above concept, the technical solution adopted in this application is: Steam supply system, including: A steam generator system includes steam generator units arranged in parallel. Each steam generator unit includes three steam generators. The six steam generators are connected to a steam supply pipeline through steam branches. Each steam branch is equipped with a steam regulating valve. The steam supply pipeline is connected to a venting pipeline, and the venting pipeline is equipped with a steam venting valve. An alcohol supply system is provided to supply alcohol to a steam generator, and an alcohol main valve is provided between the alcohol supply system and each steam generator. A liquid oxygen supply system is provided to supply liquid oxygen to the steam generators, and a liquid oxygen main valve is provided between the liquid oxygen supply system and each of the steam generators. A softened water supply system is provided to supply softened water to the steam generators, and a main water valve is provided between the softened water supply system and each of the steam generators. The control system is communicatively connected to each of the steam generators, each of the steam venting valves, each of the alcohol main valves, each of the liquid oxygen main valves, and each of the water main valves, and is used to control the number of working steam generators and to control the opening degree of the alcohol main valves, the liquid oxygen main valves, and the water main valves, so as to adjust the steam flow rate of the steam generator system in stages within the range of 50 kg / s to 300 kg / s.

[0008] In one or more embodiments of this application, the alcohol supply system includes two sets of alcohol supply units, each set of alcohol supply units corresponding to two steam generator units. Each alcohol supply unit includes an alcohol tank and an alcohol supply pipeline. One end of the alcohol supply pipeline is connected to the alcohol tank, and the other end is connected to the three steam generators of the corresponding steam generator unit through three alcohol branches. The main alcohol valve is located on the alcohol branch. The alcohol supply pipeline is equipped with an alcohol pump, an alcohol flow meter, a first temperature sensor, and a first pressure sensor; Each of the alcohol branch lines is connected to an alcohol discharge pipeline, and the alcohol discharge pipeline is equipped with an alcohol discharge valve. The three alcohol discharge pipelines of each alcohol supply unit converge into an alcohol discharge main pipe, which is connected to the corresponding alcohol tank. The alcohol pump, alcohol flow meter, first temperature sensor, first pressure sensor, and alcohol discharge valve are all communicatively connected to the control system.

[0009] In one or more embodiments of this application, the alcohol supply system further includes an alcohol replenishment tank, which is connected to two alcohol tanks respectively and is used to replenish alcohol to the alcohol tanks.

[0010] In one or more embodiments of this application, the alcohol supply pipeline is connected to an alcohol return pipeline, one end of the alcohol return pipeline opposite to the alcohol supply pipeline is connected to the alcohol tank, and the alcohol return pipeline is provided with an alcohol return regulating valve and an alcohol return check valve, and the alcohol return regulating valve is communicatively connected to the control system.

[0011] In one or more embodiments of this application, the liquid oxygen supply system includes a liquid oxygen tank and two liquid oxygen supply pipelines. The two liquid oxygen supply pipelines correspond one-to-one with the two steam generator units. One end of each liquid oxygen supply pipeline is connected to the liquid oxygen tank, and the other end is connected to the three steam generators of the corresponding steam generator unit through three liquid oxygen branches. The liquid oxygen main valve is located on the liquid oxygen branch, and a second temperature sensor and a second pressure sensor are provided on the liquid oxygen branch. The liquid oxygen supply pipeline is equipped with a liquid oxygen pump and a liquid oxygen flow meter, and the liquid oxygen pump and the liquid oxygen flow meter are respectively connected to the control system.

[0012] In one or more embodiments of this application, the liquid oxygen supply pipeline is connected to a liquid oxygen return pipeline, and one end of the liquid oxygen return pipeline opposite to the liquid oxygen supply pipeline is connected to the liquid oxygen tank. The liquid oxygen return pipeline is equipped with a liquid oxygen return regulating valve, a liquid oxygen return flow meter, and a liquid oxygen check valve. The liquid oxygen return pipeline is also connected to a first venting pipeline, which is equipped with a first venting valve. The liquid oxygen supply pipeline is connected to a second venting pipeline, which is equipped with a second venting valve. A precooling pipeline is connected between the liquid oxygen return pipeline and the liquid oxygen supply pipeline, and the precooling pipeline is equipped with a precooling valve. The liquid oxygen supply pipeline is equipped with a liquid oxygen filter; The liquid oxygen reflux regulating valve, the liquid oxygen reflux flow meter, the precooling valve, and the second venting valve are all communicatively connected to the control system.

[0013] In one or more embodiments of this application, each of the liquid oxygen branches is connected to a liquid oxygen discharge pipeline, and the liquid oxygen discharge pipeline is equipped with a liquid oxygen discharge valve. The three liquid oxygen discharge pipelines corresponding to each of the liquid oxygen supply pipelines converge into a liquid oxygen discharge main pipe, and the liquid oxygen discharge main pipe is connected to the liquid oxygen tank.

[0014] In one or more embodiments of this application, the softened water supply system includes a water storage tank and two softened water supply pipelines. Each of the two softened water supply pipelines corresponds one-to-one with one of the two steam generator units. One end of each softened water supply pipeline is connected to the water storage tank, and the other end is connected to the three steam generators of the corresponding steam generator unit via three softened water branch lines. A main water valve is located on one of the softened water branch lines, and the softened water branch lines are also equipped with a water-electric regulating valve and a third pressure sensor. A water pump and a softened water flow meter are installed on the softened water supply pipelines. The electric water regulating valve, the water pump, the softened water flow meter, and the third pressure sensor are all communicatively connected to the control system. The softened water supply pipeline is connected to a softened water discharge pipeline. One end of the softened water discharge pipeline, away from the softened water supply pipeline, is connected to the water storage tank. A softened water discharge valve is installed on the softened water discharge pipeline, and the softened water discharge valve is communicatively connected to the control system.

[0015] In one or more embodiments of this application, the rated alcohol flow rate of the steam generator is 11.2 L / s and the pressure is 2.35 MPa; the liquid oxygen flow rate is 9.8 L / s and the pressure is 2.8 MPa; and the softened water flow rate is 26.6 L / s and the pressure is 4 MPa. The steam generator has a rated steam generation capacity of 50 kg / s, a rated steam temperature of 300℃, and a rated steam pressure of 1.3 MPa. The softened water inlet pressure of the steam generator is 4 MPa, and the flow rate is 26.6 L / s.

[0016] A steam supply method, applied to the steam supply system described above, comprising the following steps: S1. Determine whether the target flow rate is 0-50 kg / s and the initial operating condition is 50 kg / s. If yes, the startup scheme is to control one of the steam generators in one of the steam generator units to work, and the cascade adjustment scheme is to adjust the steam vent valve. If no, proceed to step S2. S2. Determine if the target flow rate is 50kg / s-100kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control one of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S3. S3. Determine if the target flow rate is 100kg / s-150kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control two of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S4. S4. Determine if the target flow rate is 100 kg / s-150 kg / s and the initial operating condition is 50 kg / s-100 kg / s. If yes, the startup scheme is to control two of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control one of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S5. S5. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control three of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S6. S6. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control two of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S7. S7. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control one of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S8. S8. Determine if the target flow rate is 200kg / s-250kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control three of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S9. S9. Determine if the target flow rate is 200kg / s-250kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators in one of the steam generator units to work, and adjust the steam vent valve accordingly. The cascade adjustment scheme is to control two of the steam generators in another steam generator unit to work, and adjust the steam vent valve accordingly. If no, proceed to step S10. S10. Determine if the target flow rate is 250kg / s-300kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three steam generators of one of the steam generator units to operate, and coordinate with the adjustment of the steam vent valve. The cascade adjustment scheme is to control three steam generators of another steam generator unit to operate. If no, the process ends. The beneficial effects of this application are: The flow rate is adjusted by changing the number of independent steam generators in each steam generator unit and coordinating with the operating status of the steam generators in another steam generator unit. Compared with the traditional single valve adjustment method, this adjustment method is more flexible and can quickly and accurately change the steam flow rate according to actual needs. Furthermore, it can achieve step-by-step adjustment of the steam flow rate. At the same time, this embodiment uses alcohol as a combustion agent. The heat generated by the combustion of alcohol heats the softened water to produce steam. Alcohol combustion can meet the requirements of multiple starts, long continuous working time, and large flow rate. The flue gas generated after alcohol combustion has a small impact on the environment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a steam supply system provided in an embodiment of this application; Figure 2 This is a schematic diagram of an alcohol supply system provided in an embodiment of this application; Figure 3 This is a schematic diagram of a liquid oxygen supply system provided in an embodiment of this application; Figure 4 This is a schematic diagram of a softened water supply system provided in an embodiment of this application; Figure 5 This is an embodiment of the present application. Figure 1 The enlarged view at point A is shown below; Figure 6 This is an embodiment of the present application. Figure 1 The enlarged view of point B shown.

[0019] Explanation of reference numerals in the attached figures: 1. Steam generator system; 11. Steam generator unit; 12. Steam generator; 13. Steam supply pipeline; 14. Steam vent valve; 15. Steam regulating valve; 16. Steam vent pipeline; 2. Alcohol supply system; 21. Main alcohol valve; 22. Alcohol supply unit; 221. Alcohol tank; 222. Alcohol supply pipeline; 23. Branch alcohol line; 24. Alcohol pump; 25. Alcohol flow meter; 26. First temperature sensor; 27. First pressure sensor; 28. Alcohol discharge pipeline; 281. Alcohol discharge valve; 282. Main alcohol discharge line; 29. ​​Alcohol replenishment tank; 291. Replenishment valve; 210. Alcohol return pipeline; 2101. Alcohol return regulating valve; 2102. Alcohol return check valve; 220. Alcohol filter; 3. Liquid oxygen supply system; 31. Liquid oxygen main valve; 32. Liquid oxygen tank; 33. Liquid oxygen supply pipeline; 34. Liquid oxygen branch line; 351. Second temperature sensor; 352. Second pressure sensor; 353. Liquid oxygen pump; 354. Liquid oxygen flow meter; 36. Liquid oxygen return pipeline; 361. Liquid oxygen return regulating valve; 362. Liquid oxygen return flow meter; 363. Liquid oxygen check valve; 37. Pre-cooling pipeline; 371. Pre-cooling valve; 38. Liquid oxygen filter; 39. Liquid oxygen discharge pipeline; 391. Liquid oxygen discharge valve; 392. Liquid oxygen discharge main pipe; 310. First venting pipeline; 311. First venting valve; 312. Second venting pipeline; 313. Second venting valve; 4. Softened water supply system; 41. Main water valve; 42. Water storage tank; 43. Softened water supply pipeline; 44. Softened water branch pipeline; 45. Electric water regulating valve; 46. Third pressure sensor; 471. Water pump; 472. Softened water flow meter; 48. Softened water discharge pipeline; 481. Softened water discharge valve; 5. First pressurization system; 51. First pressurization valve; 52. First pressure relief valve; 6. Second booster system; 61. Second booster valve; 62. Second pressure relief valve; 7. Third pressurization system; 61. Third pressurization valve; 62. Third pressure relief valve. Detailed Implementation

[0020] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of this application will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0021] It should be understood that the phrase "an embodiment" or "one embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in one embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0025] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0027] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] This embodiment provides a steam supply system that can meet the requirements of large gradient changes in steam flow rate during the experiment, while having a smaller impact on the environment.

[0029] For example, such as Figures 1 to 6 As shown, the steam supply system includes a steam generator system 1, an alcohol supply system 2, a liquid oxygen supply system 3, a softened water supply system 4, and a control system. The steam generator system 1 includes steam generator units 11 connected in parallel. Each steam generator unit 11 includes three steam generators 12, which produce steam. The six steam generators 12 are connected to a steam supply pipeline 13 via steam branches, allowing the steam generated by the steam generators 12 to be discharged to the required location through the steam supply pipeline 13. Each steam branch is equipped with a steam regulating valve 15 for regulating the steam flow rate. The steam supply pipeline 13 is connected to a steam venting pipeline 16, which is equipped with a steam venting valve 14 for regulating the steam flow rate in the steam supply pipeline 13.

[0030] A steam vent valve 14 is provided on the steam supply pipeline 13. Adjusting the opening of the steam vent valve 14 can regulate the steam flow rate in the steam supply pipeline 13.

[0031] In this embodiment, the alcohol supply system 2 supplies alcohol fuel to each steam generator 12, and each steam generator 12 is connected to the alcohol supply system 2 by an alcohol main valve 21, which controls the amount of alcohol supplied to the steam generator 12. The liquid oxygen supply system 3 supplies liquid oxygen to each steam generator 12, and each steam generator 12 is connected to the liquid oxygen supply system 3 by a liquid oxygen main valve 31, which controls the amount of liquid oxygen supplied to the steam generator 12. The softened water supply system 4 supplies softened water to each steam generator 12, and each steam generator 12 is connected to the softened water supply system 4 by a water main valve 41, which controls the amount of softened water supplied to the steam generator 12.

[0032] In this embodiment, the control system is communicatively connected to each steam generator 12, each steam vent valve 14, each alcohol main valve 21, each liquid oxygen main valve 31, and each water main valve 41. The control system is used to control the number of operating steam generators 12, and to control the opening degree of the alcohol main valve 21, liquid oxygen main valve 31, and water main valve 41, so as to adjust the steam flow rate of the steam generator system 1 in stages within the range of 50 kg / s to 300 kg / s.

[0033] The steam supply system provided in this embodiment adjusts the flow rate by changing the number of independent steam generators 12 operating in each group of steam generator units 11 and coordinating with the operating status of the steam generators 12 in another group of steam generator units 11. Combined with the adjustment of the steam vent valve 14, this adjustment method is more flexible than the traditional single valve adjustment method. It can quickly and accurately change the steam flow rate according to actual needs and can achieve step-by-step adjustment of the steam flow rate. At the same time, this embodiment uses alcohol as a combustion agent. The heat generated by the combustion of alcohol heats the softened water to produce steam. The combustion of alcohol can meet the needs of multiple starts, long continuous working time, and large flow rate. The flue gas generated after the combustion of alcohol has a small impact on the environment.

[0034] In some optional embodiments, the alcohol supply system 2 includes two sets of alcohol supply units 22, each corresponding to one of the two steam generator units 11. Each alcohol supply unit 22 includes an alcohol tank 221 and an alcohol supply pipeline 222. One end of the alcohol supply pipeline 222 is connected to the alcohol tank 221, and the other end is connected to the three steam generators 12 of the corresponding steam generator unit 11 through three alcohol branches 23. An alcohol main valve 21 is provided on each alcohol branch 23, that is, each alcohol branch 23 is provided with an alcohol main valve 21.

[0035] Furthermore, the alcohol supply line 222 is equipped with an alcohol pump 24, an alcohol flow meter 25, a first temperature sensor 26, and a first pressure sensor 27. The alcohol pump 24 is used to provide power for the alcohol. The alcohol flow meter 25 is used to detect the flow rate of alcohol in the alcohol supply line 222, the first temperature sensor 26 is used to detect the temperature of the alcohol, and the first pressure sensor 27 is used to detect the pressure of the alcohol.

[0036] In some embodiments, the alcohol branch 23 may also be equipped with a temperature sensor, a pressure sensor and a flow meter, but this embodiment does not limit this.

[0037] In at least one possible implementation, each alcohol branch 23 is connected to an alcohol discharge pipe 28. The alcohol discharge pipe 28 is equipped with an alcohol discharge valve 281. The three alcohol discharge pipes 28 of each alcohol supply unit 22 converge into a single alcohol discharge manifold 282, which is connected to the corresponding alcohol tank 221. The alcohol discharge pipes 28 are used to discharge unwanted alcohol from the alcohol branch 23 to the alcohol tank 221 for recycling and to avoid waste. Adjusting the opening of the alcohol discharge valve 281 regulates the amount of alcohol discharged. Each alcohol branch 23 is connected to a separate alcohol discharge pipe 28, enabling individual control of the alcohol in each branch 23 and providing greater flexibility.

[0038] In this embodiment, the alcohol pump 24, alcohol flow meter 25, first temperature sensor 26, first pressure sensor 27, and alcohol discharge valve 281 are all communicatively connected to the control system. The control system controls the start and stop of the alcohol pump 24, its power, and the opening degree of the alcohol discharge valve 281. The control system acquires data from the alcohol flow meter 25, the first temperature sensor 26, and the first pressure sensor 27 to form feedback, thereby facilitating control based on the feedback information. In this embodiment, multiple first temperature sensors 26 and first pressure sensors 27 can be spaced apart to improve detection accuracy.

[0039] In some embodiments, an upstream valve may be provided for the alcohol pump 24, and a downstream valve may be provided.

[0040] Optionally, the steam supply system further includes a second pressurization system 6, which is used to pressurize the alcohol tank 221, for example, by introducing nitrogen gas into the alcohol tank 221 so that the alcohol in the alcohol tank 221 can enter the alcohol supply line 222. For example, a second pressurization valve 61 is provided on the line connecting the second pressurization system 6 and the alcohol tank 221, which is used to regulate the pressure of the nitrogen gas in the line. The second pressurization system 6 is also provided with a second pressure relief valve 62, which is connected to the alcohol tank 221 through a line for depressurizing the inside of the alcohol tank 221.

[0041] In one or more embodiments of this application, the alcohol supply system 2 further includes an alcohol replenishment tank 29, which is connected to two alcohol tanks 221 respectively and is used to replenish alcohol to the alcohol tanks 221.

[0042] Optionally, the steam supply system also includes a third pressurization system 7, which is used to pressurize the alcohol replenishment tank 29. For example, nitrogen gas is introduced into the alcohol replenishment tank 29 so that the alcohol in the alcohol replenishment tank 29 can enter the alcohol tank 221. For example, a third pressurization valve 61 is provided on the pipeline connecting the third pressurization system 7 and the alcohol replenishment tank 29. The third pressurization valve 61 is used to regulate the pressure of the nitrogen gas in the pipeline. The third pressurization system 7 is also provided with a third pressure relief valve 62, which is connected to the alcohol replenishment tank 29 through a pipeline and is used to relieve pressure inside the alcohol replenishment tank 29. In this embodiment, the two alcohol tanks 221 are connected in parallel and will not affect each other, thus having a high degree of independence.

[0043] In at least one embodiment, the alcohol supply line 222 is connected to an alcohol return line 210, which is used for the return of alcohol from the alcohol supply line 222. One end of the alcohol return line 210, away from the alcohol supply line 222, is connected to the alcohol tank 221. The alcohol return line 210 is equipped with an alcohol return regulating valve 2101 and an alcohol return check valve 2102. The alcohol return regulating valve 2101 is communicatively connected to a control system, which controls the opening degree of the alcohol return regulating valve 2101. The alcohol return check valve 2102 prevents alcohol from flowing only along the alcohol return line 210 from the alcohol supply line 222 towards the alcohol tank 221, without backflow.

[0044] Optionally, the connection point between the alcohol return line 210 and the alcohol supply line 222 is located between the alcohol flow meter 25 and the post-pump valve of the alcohol pump 24.

[0045] Optionally, an alcohol filter 220 is also provided on the alcohol supply line 222 to filter impurities in the alcohol. Optionally, the alcohol filter 220 is located upstream of the alcohol branch line 23.

[0046] In some alternative implementations, such as Figure 3 As shown, the liquid oxygen supply system 3 includes a liquid oxygen tank 32 and two liquid oxygen supply pipelines 33. Each of the two liquid oxygen supply pipelines 33 corresponds to one of the two steam generator units 11. One end of each liquid oxygen supply pipeline 33 is connected to the liquid oxygen tank 32, and the other end is connected to the three steam generators 12 of the corresponding steam generator unit 11 via three liquid oxygen branch lines 34. A liquid oxygen main valve 31 is installed on each liquid oxygen branch line 34; that is, each liquid oxygen branch line 34 is equipped with a liquid oxygen main valve 31.

[0047] In some embodiments, the liquid oxygen branch 34 is provided with a second temperature sensor 351 and a second pressure sensor 352. The second temperature sensor 351 is used to detect the temperature of the liquid oxygen, and the second pressure sensor 352 is used to detect the pressure of the liquid oxygen. One or more of the second temperature sensor 351 and the second pressure sensor 352 may be provided; this embodiment does not limit this.

[0048] In some optional embodiments, the liquid oxygen supply line 33 may also be equipped with a temperature sensor and a pressure sensor to detect the temperature and pressure of the liquid oxygen in the liquid oxygen supply line 33, and the number of sensors may be one or more. This embodiment is not limited in this respect.

[0049] In at least one embodiment, the liquid oxygen supply line 33 is equipped with a liquid oxygen pump 353 and a liquid oxygen flow meter 354. The liquid oxygen pump 353 is used to provide power for the liquid oxygen, and the liquid oxygen flow meter 354 is used to detect the flow rate of the liquid oxygen.

[0050] In this embodiment, the liquid oxygen pump 353 and the liquid oxygen flow meter 354 are respectively connected to the control system. The control system controls the opening and closing, power and other parameters of the liquid oxygen pump 353. The control system can also obtain the data of the liquid oxygen flow meter 354 to adjust the working parameters of components such as the liquid oxygen main valve 31 and the liquid oxygen pump 353 according to the data.

[0051] In some embodiments, the liquid oxygen supply line 33 is connected to a liquid oxygen return line 36, which is used for the return of liquid oxygen from the liquid oxygen supply line 33. One end of the liquid oxygen return line 36, away from the liquid oxygen supply line 33, is connected to a liquid oxygen tank 32 to input the returned liquid oxygen into the liquid oxygen tank 32. The liquid oxygen return line 36 is equipped with a liquid oxygen return regulating valve 361, a liquid oxygen return flow meter 362, and a liquid oxygen check valve 363. Both the liquid oxygen return regulating valve 361 and the liquid oxygen return flow meter 362 are communicatively connected to a control system. The control system controls the opening degree of the liquid oxygen return regulating valve 361 and acquires the parameters of the liquid oxygen return flow meter 362. The liquid oxygen check valve 363 is used to prevent the liquid oxygen in the liquid oxygen return line 36 from flowing backwards.

[0052] In one or more embodiments of this application, the liquid oxygen reflux line 36 is connected to a first venting line 310, and the first venting line 310 is provided with a first venting valve 311. The first venting line 310 is used to release the gas in the liquid oxygen reflux line 36, and the control system is communicatively connected to the first venting valve 311 and is used to control the opening degree of the first venting valve 311.

[0053] For example, the liquid oxygen supply line 33 is connected to a second venting line 312, and the second venting line 312 is provided with a second venting valve 313. The second venting line 312 is used to release the gas in the liquid oxygen supply line 33.

[0054] In some embodiments, a precooling pipeline 37 is connected between the liquid oxygen return pipeline 36 and the liquid oxygen supply pipeline 33. The precooling pipeline 37 is used to precool the liquid oxygen pump 353 and the liquid oxygen supply pipeline 33. The precooling pipeline 37 is equipped with a precooling valve 371, which is communicatively connected to a control system. The control system is used to control the opening degree of the precooling valve 371. In some optional embodiments, the precooling pipeline 37 is connected to the liquid oxygen pump 353, so that the liquid oxygen supply pipeline 33, the liquid oxygen pump 353, the liquid oxygen return pipeline 36, and the liquid oxygen tank 32 form a precooling loop. Optionally, a pre-pump valve is provided upstream of the liquid oxygen pump 353, and a post-pump valve is provided downstream of the liquid oxygen pump 353. The connection point between the liquid oxygen return pipeline 36 and the liquid oxygen supply pipeline 33 is located between the post-pump valve and the liquid oxygen flow meter 354.

[0055] In some embodiments, the liquid oxygen supply line 33 is equipped with a liquid oxygen filter 38, which is used to remove impurities from the liquid oxygen. Optionally, the liquid oxygen filter 38 is located upstream of the liquid oxygen branch line 34.

[0056] Optionally, each liquid oxygen branch 34 is connected to a liquid oxygen discharge pipe 39, which is used to discharge liquid oxygen from the liquid oxygen branch 34 for recycling and to avoid waste. The liquid oxygen discharge pipe 39 is equipped with a liquid oxygen discharge valve 391. The three alcohol discharge pipes 28 corresponding to each liquid oxygen supply pipe 33 converge into a single liquid oxygen discharge main pipe 392, which is connected to the liquid oxygen tank 32. Each liquid oxygen branch 34 is connected to a separate liquid oxygen discharge pipe 39, enabling individual control of the liquid oxygen in each branch 34 and providing greater flexibility.

[0057] In some optional embodiments, the liquid oxygen tank 32 is pressurized by the first pressurization system 5, for example, by introducing nitrogen gas into the liquid oxygen tank 32 so that the liquid oxygen in the liquid oxygen tank 32 can enter the liquid oxygen supply line 33. For example, a first pressurization valve 51 is provided on the line connecting the first pressurization system 5 and the liquid oxygen tank 32, and the first pressurization valve 51 is used to regulate the pressure of nitrogen gas in the line. The first pressurization system 5 is also provided with a first pressure relief valve 52, which is connected to the liquid oxygen tank 32 through a line and is used to relieve pressure inside the liquid oxygen tank 32.

[0058] In some optional embodiments, the softened water supply system 4 includes a water storage tank 42 and two softened water supply pipelines 43. Each of the two softened water supply pipelines 43 corresponds one-to-one with a steam generator unit 11. One end of each pipeline is connected to the water storage tank 42, and the other end is connected to the three steam generators 12 of the corresponding steam generator unit 11 via three softened water branch pipelines 44. A main water valve 41 is installed on each softened water branch pipeline 44; that is, each softened water branch pipeline 44 is equipped with a main water valve 41. This configuration allows the softened water supply system 4 to supply softened water to each steam generator 12 independently, providing high flexibility.

[0059] Optionally, the softened water branch 44 is also equipped with a water-electric regulating valve 45 and a third pressure sensor 46. The water-electric regulating valve 45 is communicatively connected to the control system and its opening is controlled by the control system. The third pressure sensor 46 is used to detect the pressure of the softened water in the softened water branch 44. The control system can obtain the pressure from the third pressure sensor 46.

[0060] The softened water supply pipeline 43 is equipped with a water pump 471 and a softened water flow meter 472. The water pump 471 provides power to the softened water, and the softened water flow meter 472 detects the flow rate of the softened water. The control system is communicatively connected to the water pump 471 and is used to control parameters such as the start-up and shutdown of the water pump 471 and its power. The control system can acquire data from the softened water flow meter 472. Optionally, the water pump 471 can be a high-lift, fixed-frequency pump.

[0061] In some alternative implementations, such as Figure 4 As shown, the softened water supply pipe 43 is connected to a softened water discharge pipe 48. One end of the softened water discharge pipe 48, away from the softened water supply pipe 43, is connected to a water storage tank 42. A softened water discharge valve 481 is installed on the softened water discharge pipe 48, and the softened water discharge valve 481 is communicatively connected to the control system. In some embodiments, the softened water discharge pipe 48 is connected to the end of the softened water supply pipe 43 near the softened water branch 44.

[0062] In this embodiment, a pre-pump valve is provided upstream of the water pump 471, and a post-pump valve is provided downstream of the water pump 471. A softened water flow meter 472 is installed between the water pump 471 and the post-pump valve. The softened water supply pipeline 43 and the softened water discharge pipeline 48 are connected by a pre-set pipeline. The connection point of this pre-set pipeline with the softened water supply pipeline 43 is located between the water pump 471 and the softened water flow meter 472, and is used for the backflow of softened water in the softened water supply pipeline 43. A bypass regulating valve is also provided on the pre-set pipeline to control the amount of backflow.

[0063] It should be noted that, in operation, the steam supply system provided in this embodiment uses three steam generators 12 in one steam generator unit 11 and three steam generators 12 in another steam generator unit 11, operating in parallel. This allows for easy step-by-step adjustment of the steam flow rate from 50 kg / s to 300 kg / s. This design can precisely match the steam flow rate requirements at different stages of the exhaust ejection process. Whether it's the low-flow preheating during the start-up phase or the high-flow acceleration in the later stages, it can provide a stable and suitable steam supply, effectively improving the flexibility and adaptability of the exhaust ejection process. Adjusting the flow rate by changing the number of independent steam generators 12 operating within each steam generator unit 11 is more flexible than the traditional single-valve adjustment method, allowing for quick and accurate changes in steam flow rate according to actual needs.

[0064] Simultaneously, by combining precise control of various supply systems, such as adjusting the opening of the alcohol reflux regulating valve 2101 and the liquid oxygen reflux regulating valve 361 via PID control, as well as the steam venting valve 14, the accuracy of flow adjustment is further improved. This ensures that the steam flow rate remains stable at the set value, reducing the adverse effects of flow fluctuations on the test equipment. During flow adjustment, the system can rationally control the supply of alcohol, liquid oxygen, and softened water according to the actual steam flow demand. For example, when the flow demand is low, the corresponding fuel supply is reduced to avoid unnecessary energy consumption. In addition, by optimizing the number of working units of steam generator 12, the system is always operating under high-efficiency conditions, which improves energy conversion efficiency, reduces operating costs, and meets the development requirements of energy conservation and emission reduction. Each supply system adopts an independent control and mutual coordination design concept. For example, the alcohol supply system 2 uses an independent alcohol tank 221 and alcohol pump 24, the liquid oxygen supply system 3 is equipped with a pre-cooling pipeline 37, a liquid oxygen return pipeline 36, etc., and the softened water supply system 4 is equipped with a bypass regulating valve, etc. These designs enable the system to better cope with various operating condition changes and emergencies during operation, ensuring the stability and reliability of the supply of each medium.

[0065] It should also be noted that even if a subsystem malfunctions, the impact on the overall steam supply can be minimized through adjustments and coordination of other subsystems, ensuring smooth start-up and shutdown of the exhaust ejection process. This steam supply system is equipped with a comprehensive automated control program. Operators only need to set relevant parameters according to the initial steam flow requirements, and the system can automatically complete the preparation of various media and flow adjustments, greatly simplifying the operation process, reducing operational difficulty, and minimizing the impact of human factors on system operation. Furthermore, the modular design of the system makes the installation, maintenance, and replacement of various components more convenient and faster, helping to reduce maintenance costs and extend the overall service life of the system.

[0066] Optionally, this embodiment provides the frequencies of each pump to match different numbers of operating units of the steam generator 12. For example, the frequencies of one group of liquid oxygen pump 353, alcohol pump 24, and water pump 471 are set as follows: when the number of operating units of the corresponding steam generator unit 11 is 1, the power of liquid oxygen pump 353 is 28Hz, the frequency of alcohol pump 24 is 30Hz, and the frequency of water pump 471 is 15Hz; when the number of operating units of the corresponding steam generator unit 11 is 2, the power of liquid oxygen pump 353 is 37.6Hz, the frequency of alcohol pump 24 is 36.2Hz, and the frequency of water pump 471 is 15Hz; when the number of operating units of the corresponding steam generator unit 11 is 3, the power of liquid oxygen pump 353 is 46.8Hz, the frequency of alcohol pump 24 is 48.8Hz, and the frequency of water pump 471 is 15Hz.

[0067] The frequencies of another set of liquid oxygen pump 353, alcohol pump 24, and water pump 471 are set as follows: when the number of working steam generators 12 in the corresponding steam generator unit 11 is 1, the power of liquid oxygen pump 353 is 27.8Hz, the frequency of alcohol pump 24 is 30.8Hz, and the frequency of water pump 471 is 15Hz; when the number of working steam generators 12 in the corresponding steam generator unit 11 is 2, the power of liquid oxygen pump 353 is 38Hz, the frequency of alcohol pump 24 is 36Hz, and the frequency of water pump 471 is 15Hz; when the number of working steam generators 12 in the corresponding steam generator unit 11 is 3, the power of liquid oxygen pump 353 is 47.3Hz, the frequency of alcohol pump 24 is 48.5Hz, and the frequency of water pump 471 is 15Hz.

[0068] In this embodiment, the steam generator 12 generates high-temperature, high-pressure gas by burning liquid oxygen and alcohol. The high-temperature, high-pressure gas generated by the steam generator 12 is mixed with softened water sprayed and atomized on the walls of the combustion chamber and mixing chamber. When the alcohol supply system 2, liquid oxygen supply system 3 and softened water supply system 4 are connected to the steam generator unit 11, they each branch out into three routes and then connect to the corresponding three steam generators 12.

[0069] The liquid oxygen supply system 3 delivers liquid oxygen to the corresponding steam generator 12 through three liquid oxygen branches 34 and an oxygen main valve. A second pressure sensor 352 and a second temperature sensor 351 are installed upstream of the oxygen main valve to monitor the temperature and pressure of the liquid oxygen added to the steam generator 12 in real time. The three liquid oxygen branches 34 are connected to a liquid oxygen discharge main pipe 392 through a liquid oxygen discharge valve 391 to transport the returned liquid oxygen back to the liquid oxygen tank 32.

[0070] The softened water supply system 4 is divided into three softened water branches 44, which deliver softened water to the corresponding steam generators 12 through the main water valve 41. A third pressure sensor 46 and a water-electric regulating valve 45 are installed between the water storage tank 42 and the steam generator 12 to regulate the amount of water supplied to the steam generator 12 and to detect the water pressure.

[0071] The liquid oxygen and alcohol injected by the injector in the steam generator 12 are atomized, evaporated, mixed and burned in its combustion chamber. The resulting high-temperature and high-pressure fuel-rich gas mixes with softened water sprayed and atomized on the walls of the combustion chamber and mixing chamber. The softened water is heated and evaporated into water vapor. The water vapor is discharged from the steam venting pipe 16. A steam regulating valve 15 is installed on the steam venting pipe 16 to regulate the amount of steam discharged. Then the three steam venting pipes 16 are combined.

[0072] With this design, a single steam generator 12 has a rated steam generation capacity of 50 kg / s, a rated steam temperature of 300℃, and a rated steam pressure of 1.3 MPa. To achieve adjustable steam flow, the medium supply system of the steam generator 12 needs to provide a variable number of units of alcohol, liquid oxygen, and softened water to each group of steam generator units 11. This allows the steam generator system 1 to adjust the steam flow from 50 to 300 kg / s in stages by changing the number of operating units of the three independent steam generators 12 within each group of steam generator units 11, and to operate two groups of steam generator units 11 in parallel. This, combined with fine-tuning of the flow in conjunction with the steam supply pipeline 13, improves efficiency.

[0073] In one embodiment, the rated alcohol flow rate of the steam generator 12 is 11.2 L / s and the pressure is 2.35 MPa; the liquid oxygen flow rate is 9.8 L / s and the pressure is 2.8 MPa; and the water flow rate is 26.6 L / s and the pressure is 4 MPa.

[0074] In one embodiment, based on the required supply of alcohol, liquid oxygen, and softened water for the steam generator system 1, a variable number of propellants for the steam generator 12 test are provided to each steam generator unit 11. In one embodiment, each supply line uses an independent alcohol tank 221, and an alcohol pump 24 delivers the alcohol from the tank 221 to the steam generator unit 11, allowing for independent control of the two alcohol supply lines 222. The two alcohol tanks 221 are connected to an alcohol replenishment tank 29 for replenishing the two tanks. The two alcohol tanks 221 supply alcohol to the two steam generator units 11 respectively, and each tank is connected to an alcohol replenishment tank 29. The alcohol replenishment tank 29 is pressurized by a nitrogen booster valve and then delivered to a distribution line. The replenishment valves 291 on the two alcohol tanks 221 are then opened, allowing the alcohol to flow into the tanks 221 through a one-way valve on the distribution line, replenishing the alcohol inside the tanks.

[0075] Alcohol tank 221 flows through the outlet valve and alcohol filter 220, and under the action of alcohol pump 24, it flows through the alcohol check valve into the post-pump valve of alcohol pump 24, and then is supplied to steam generator 12. During the process of flowing into steam generator 12, alcohol flow meter 25, first pressure sensor 27 and first temperature sensor 26 detect and control the pressure, temperature and flow rate of alcohol. Overflowing alcohol will flow back into the interior of alcohol tank 221 through the return regulating valve on the return pipeline.

[0076] This design incorporates a media supply system for steam generator 12 consisting of subsystems for supplying alcohol, liquid oxygen, softened water, and oxygen. This design prevents mutual interference when the two steam generator units 11 operate in parallel and increases the operability and stability of the media supply system. The various propellant supply subsystems also consist of two pump-pressurized supply systems. Each system comprises a storage tank, pressurization system, centrifugal pump, main pipeline, return pipeline, discharge pipeline, and valves. The flow rate and pressure during the steam generator unit 11 test are adjusted by changing the pump frequency and flow regulating valves.

[0077] By setting up an alcohol return pipeline 210, and connecting the main alcohol valve 21 to the three steam generators 12 in the steam generator unit 11, alcohol can be precisely delivered through independent pipelines according to the needs of different steam generators 12, ensuring that each steam generator 12 receives an appropriate amount of alcohol to meet its normal operating process requirements. The alcohol return pipeline 210 is connected to the alcohol tank 221 via an alcohol return regulating valve 2101 and an alcohol return check valve 2102, enabling efficient return of used alcohol to the alcohol tank 221. The alcohol return regulating valve 2101 can precisely control the alcohol return flow rate according to the actual system operation, ensuring that the alcohol circulation volume within the system is within an appropriate range. The alcohol return check valve 2102 prevents reverse flow of alcohol, ensuring the stability and reliability of the return process and improving the efficiency of alcohol recycling. Before the alcohol flows into the main alcohol valve 21 from the alcohol branch line 23, alcohol discharge lines 28 are led out separately, and the three alcohol discharge lines 28 are combined into a single alcohol discharge main line 282, which transports the returned liquid back to the alcohol tank 221 corresponding to the steam generator unit 11. This design can promptly recover residual alcohol in the alcohol branch line 23, avoiding alcohol accumulation or waste in the alcohol branch line 23, further improving alcohol utilization and reducing production costs.

[0078] In one embodiment, when the liquid oxygen supply system 3 is in use, the liquid oxygen pump 353 and the liquid oxygen supply pipeline 33 are pre-cooled. After the pre-cooling is completed, the first venting pipeline 310 is closed, and the liquid oxygen returns to the liquid oxygen tank 32 through the pre-cooling valve 371 and the liquid oxygen check valve 363.

[0079] With this design, the outlet of liquid oxygen tank 32 is supplied to two sets of steam generator units 11 via two liquid oxygen supply pipelines 33. When the regulating valve near the outlet of liquid oxygen tank 32 is opened, liquid oxygen is discharged from the main pipeline under the action of the check valve. The pre-pump valve and post-pump valve of liquid oxygen pump 353 are opened, and liquid oxygen is transported to steam generator 12 under the action of liquid oxygen pump 353. A liquid oxygen flow meter 354 is installed on the liquid oxygen branch 34 flowing into steam generator 12 to detect the liquid oxygen supply. After operation, liquid oxygen flows into liquid oxygen return pipeline 36, passes through pre-cooling valve 371, check valve, and control valve, and flows back into liquid oxygen tank 32. The liquid oxygen return regulating valve 361 and liquid oxygen return flow meter 362 on liquid oxygen return pipeline 36 can detect the flow rate of the returned liquid oxygen and control the flow distribution.

[0080] In one embodiment, the liquid oxygen supply pressure to the liquid oxygen tank 32 is regulated by a liquid oxygen pump 353. Adjusting the frequency of the liquid oxygen pump 353 increases the liquid oxygen pressure to the design pressure. Before entering the steam generator unit 11, the liquid oxygen pipeline is divided into three branch pipes, which are then delivered to the steam generator 12 via the main liquid oxygen valve 31. This design allows the internal liquid oxygen pressure of the liquid oxygen tank 32 to be controlled via the first pressure boosting valve 51 and the first pressure relief valve 52.

[0081] In one embodiment, the softened water inlet pressure of the steam generator 12 is 4 MPa, and the flow rate is 26.6 L / s. The water pressure is increased to 3.8 MPa by the softened water pump 471, and then adjusted within the flow rate range of 27 L / s to 81 L / s according to the actual water demand of the steam generator unit 11. Excess softened water is returned to the water storage tank 42 using a bypass regulating valve.

[0082] In this embodiment, when the flow rate demand is low, the supply of corresponding fuel is reduced to avoid unnecessary energy consumption. At the same time, by optimizing the number of working steam generators 12, the system is always operating under high-efficiency conditions, which improves energy conversion efficiency, reduces operating costs, and meets the development requirements of energy conservation and emission reduction. Each supply system adopts an independent control and mutual coordination design concept. For example, the alcohol supply system 2 uses an independent alcohol tank 221 and alcohol pump 24, the liquid oxygen supply system 3 is equipped with pre-cooling, reflux and other pipelines, and the softened water supply system 4 is equipped with bypass regulating valves, etc. These designs enable the system to better cope with various operating condition changes and emergencies during operation, ensuring the stability and reliability of the supply of each medium.

[0083] This embodiment employs a rocket steam generator 12, based on liquid oxygen and alcohol / softened water propellant, using liquid rocket engine thrust chamber combustion organization technology to provide steam. The rated flow rate is 50 kg / s, rated pressure is 1.9 MPa, and rated temperature is 300℃. This meets the requirements of the test equipment, such as long operating time, multiple starts, and long continuous operation. The steam generation subsystem consists of two sets of steam generator units 11, each containing three steam generators 12. By changing the number of operating units of the three independent steam generators 12 within each set of units 11, and operating the two sets of units in parallel, the steam flow rate can be adjusted in stages from 50 to 300 kg / s during the exhaust ejection process. Fine-tuning of the flow rate can be achieved based on the staged flow rate through the steam supply pipeline 13 and the steam venting valve 14 installed on the steam supply pipeline 13, improving efficiency and saving costs. All media supply systems in the steam generator 12 adopt a pump-pressure delivery system. The liquid oxygen, alcohol, and softened water supply systems are each powered by two centrifugal pumps (i.e., the alcohol pump and liquid oxygen pump 353 can be centrifugal pumps). The supply flow rate and pressure are adjusted by changing the frequency, thereby matching the two sets of steam generator units 11 to achieve the required working state. The steam generator 12 uses liquid oxygen, alcohol, and softened water as propellants. Its combustion gas composition is mainly water vapor, containing small amounts of carbon dioxide, hydrogen, and methane. It is green, environmentally friendly, and carbon-free, easy to maintain, and has the ability to be reused multiple times. The pump-pressure delivery system is simple to select. Low-pressure specifications can be selected for the equipment and pipelines before the pump. The personnel operation safety factor is high. The steam generator system 1 and the propellant supply subsystem have a compact structure, small footprint, low cost, and low investment. The control system of this invention mainly changes the response conditions by changing the frequency of the liquid oxygen pump 353, alcohol pump 24, and softened water pump 471. The operation method is easy to standardize, and fixed corresponding operating parameters can be selected according to different steam flow requirements.

[0084] After the ignition procedure is started, the main water valve 41 in front of the steam generator 12 is opened to inject softened water into the combustion chamber and mixing chamber of the steam generator 12.

[0085] With this design, opening the pre-pump and post-pump valves of the two water pumps 471 on the softened water supply pipeline 43 allows the two sets of water pumps 471 to supply softened water into their respective post-pump valves, and then into the corresponding steam generator 12. The softened water flow meter 472 can monitor the water flow rate into the steam generator 12 in real time. After the operation is completed, the overflowing softened water enters the check valve and control valve through the softened water discharge inlet and bypass valves, and then flows into the internal storage of the water tank 42.

[0086] This embodiment also provides a steam supply method applied to the aforementioned steam supply system. Optionally, the steam supply method includes the following steps: S1. Determine if the target flow rate is 0-50 kg / s and the initial operating condition is 50 kg / s. If yes, the startup scheme is to control one of the steam generators 12 of a steam generator unit 11 to work, and the cascade adjustment scheme is to adjust the steam vent valve 14. If no, proceed to step S2. S2. Determine if the target flow rate is 50kg / s-100kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators 12 in one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control one of the steam generators 12 in another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S3. S3. Determine if the target flow rate is 100kg / s-150kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators 12 in one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control two of the steam generators 12 in another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S4. S4. Determine if the target flow rate is 100 kg / s-150 kg / s and the initial operating condition is 50 kg / s-100 kg / s. If yes, the startup scheme is to control two steam generators 12 of one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control one steam generator 12 of another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S5. S5. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators 12 in one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control three of the steam generators 12 in another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S6. S6. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators 12 of one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control two of the steam generators 12 of another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S7. S7. Determine if the target flow rate is 150kg / s-200kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three steam generators 12 of one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control one steam generator 12 of another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S8. S8. Determine if the target flow rate is 200kg / s-250kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators 12 of one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control three of the steam generators 12 of another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S9. S9. Determine if the target flow rate is 200kg / s-250kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators 12 of one steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. The cascade adjustment scheme is to control two of the steam generators 12 of another steam generator unit 11 to work, and adjust the steam vent valve 14 accordingly. If no, proceed to step S10. S10. Determine if the target flow rate is 250kg / s-300kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators 12 in one steam generator unit 11 to work, and coordinate with the adjustment of the steam vent valve 14. The cascade adjustment scheme is to control three of the steam generators 12 in another steam generator unit 11 to work. If no, the process ends.

[0087] As can be seen, the steam supply method provided in this application adjusts the flow rate by changing the number of independent steam generators 12 operating in each group of steam generator units 11 and coordinating with the operating state of the steam generators 12 in another group of steam generator units 11. In conjunction with the adjustment of the steam vent valve 14, this adjustment method is more flexible than the traditional single valve adjustment method. It can quickly and accurately change the steam flow rate according to actual needs and can achieve step-by-step adjustment of the steam flow rate. At the same time, this embodiment uses alcohol as a combustion agent. The heat generated by the combustion of alcohol heats the softened water to produce steam. The combustion of alcohol can meet the needs of multiple starts, long continuous working time, and large flow rate. The flue gas generated after the combustion of alcohol has a small impact on the environment.

[0088] In some optional embodiments, the steam supply method further includes the following steps: After the liquid oxygen supply system 3 has finished precooling, ensure that the temperature sensor readings on the liquid oxygen supply system 3 pipeline are all below -175℃. Confirm that all pre-pump valves, post-pump valves, precooling valves 371, and regulating valves (which can be manual or electric) of all liquid oxygen pumps 353 are open. Start the first pressurization system 5. The control system, by receiving feedback signals from the pressure sensor at the top of the liquid oxygen tank 32, controls the opening and closing of the first pressurization valve 51 and the first pressure relief valve 52, maintaining the pressure in the liquid oxygen tank 32 at approximately 0.25 MPa. Set the pre-start parameters for the liquid oxygen, alcohol, and water supply systems according to the initial steam flow requirements.

[0089] In some embodiments, if the initial required steam flow rate is less than 50 kg / s, the frequency of the liquid oxygen pump 353 on one of the liquid oxygen supply lines 33 is set to 28 Hz and the frequency of the liquid oxygen pump 353 on the other liquid oxygen supply line 33 is set to 27.8 Hz according to the parameters. The target flow rate of 9.8 L / s is input from the screen connected to the control system. By receiving the signal from the liquid oxygen return flow meter 362 on the two liquid oxygen supply lines 33, the opening of the liquid oxygen return regulating valve 361 is adjusted to ensure that the liquid oxygen circulates in the liquid oxygen return line 36 at the set flow rate.

[0090] Next, the inlet valve (also known as the alcohol outlet electric valve), outlet valve, and alcohol reflux regulating valve 2101 of the alcohol pump 24 in the alcohol supply system 2 are opened. The second pressurization system 6 and the third pressurization system 7 are also opened. The control system receives feedback signals from the pressure sensor on the alcohol tank 221 and controls the opening and closing of the pressurization valve and the pressure relief valve to maintain the pressure of the alcohol tank 221 at approximately 0.25 MPa. The frequency of the alcohol pump 24 on one alcohol supply line 222 is set to 30 Hz, and the frequency of the alcohol pump 24 on the other alcohol supply line 222 is set to 30.8 Hz. The target flow rate of 11.2 L / s is input on the screen. The control system receives feedback signals from each alcohol flow meter 25 and adjusts the opening of all alcohol reflux regulating valves 2101 to ensure that the alcohol circulates in the reflux line according to the set flow rate.

[0091] Next, open the pre-pump valves, post-pump valves, and water bypass valves of all water pumps 471. Water pumps 471 are fixed-frequency pumps, ensuring the post-pump pressure remains stable at approximately 4 MPa. Softened water circulates in the softened water discharge pipeline 48 (which can also be called the bypass pipeline). First, start one steam generator 12 from each of the two steam generator units 11. The minimum steam flow rate for each steam generator 12 is 50 kg / s. If the required flow rate is lower than 50 kg / s, the steam vent valve 14 can be adjusted via feedback signals from the steam flow meter to fine-tune the steam flow rate. In this embodiment, a steam flow meter can be installed on the steam supply pipeline 13.

[0092] If the initial required steam flow rate is within the range of 50 kg / s to 100 kg / s, then select to start two steam generators 12 within one steam generator unit 11, and select the corresponding frequencies of the two alcohol pumps 24 and liquid oxygen pumps 353 according to the parameters. Otherwise, follow the same procedure for preparing the medium before ignition and startup; then, adjust the steam venting valve 14 according to the specific required flow rate via the feedback signal from the steam flow meter to ensure a wide range of adjustable flow rates.

[0093] In a specific embodiment, ignition is initiated. At this time, alcohol, liquid oxygen, and water circulate in their respective supply systems, and the main alcohol valve 21, main liquid oxygen valve 31, and main water valve 41 of the six steam generators 12 are all closed. Before ignition, the alcohol drain valve 281 and the liquid oxygen drain valve 391 are opened for 2-3 seconds and then closed to ensure that the main alcohol valve 21 and the main liquid oxygen valve 31 are fully filled and to prevent air entrapment.

[0094] Then, based on the planned number of units to be started, the number of steam generators 12 to be started is selected. After the ignition procedure is started, the alcohol reflux regulating valve Kf and the liquid oxygen reflux regulating valve 361Ko of the selected steam generator unit 11 begin to gradually close, and the water bypass valve closes. At the same time, the spark plug of the selected steam generator 12 opens, the liquid oxygen main valve 31 opens after a 2-second delay, the alcohol main valve 21 opens rapidly after a further 50-second delay, and the water main valve 41 opens after a further 50-second delay compared to the alcohol main valve 21. At this time, the program controls the closing rate of the alcohol reflux regulating valve Kf and the liquid oxygen reflux regulating valve 361Ko to ensure that the alcohol reflux regulating valve 2101 closes first and the liquid oxygen reflux regulating valve 361 closes later. This ensures that liquid oxygen enters the steam generator 12 first and alcohol enters later during the ignition and start-up process, achieving oxygen-enriched ignition and start-up. It also ensures that the flow rate of alcohol injected into the steam generator 12 reaches the rated operating condition of 11.2L / s first, and the flow rate of liquid oxygen injected into the steam generator 12 reaches the rated operating condition of 9.8L / s later. The purpose is to ensure that the combustion mixture ratio in the steam generator 12 is lower than the equivalent mixture ratio (the state of highest combustion temperature) to prevent the steam generator 12 from being burned.

[0095] After ignition and startup, if the initial rated flow rate of the 12 steam generators cannot meet the subsequent flow rate requirements (e.g., one steam generator 12 has already started, with a maximum steam output of 50 kg / s, and the maximum continuously adjustable flow rate is 90 kg / s), then one or two more steam generators 12 need to be ignited and started within the same steam generator unit 11. Continuous adjustment is then achieved through the steam regulating valve 15 and the steam venting valve 14.

[0096] For example, the frequency of the liquid oxygen pump 353 of one liquid oxygen supply unit is set to 37.6Hz and the frequency of the liquid oxygen pump 353 of another liquid oxygen supply unit is set to 38Hz, with an input target flow rate of 19.8L / s. The control system uses PID to adjust the opening of the oxygen return regulating valve in real time by receiving the signal from the liquid oxygen return flow meter 362, so as to ensure that the liquid oxygen circulates in the liquid oxygen return pipeline 36 at a flow rate of 9.8L / s, while the remaining liquid oxygen flow rate of 9.8L / s is continuously supplied to the operating steam generator 12 on the liquid oxygen supply pipeline 33 and the liquid oxygen branch 34. The frequency of alcohol pump 24 in alcohol supply unit 22 is set to 36Hz according to demand, and the frequency of alcohol pump 24 in another alcohol supply unit 22 is set to 36.2Hz, with a target input flow rate of 22.4L / s. The control system uses PID control to adjust the opening of alcohol reflux regulating valve 2101 in real time by receiving feedback signals from all alcohol flow meters 25 and pressure sensors downstream of alcohol pump 24. This ensures that alcohol circulates in alcohol reflux line 210 at a flow rate of 11.2L / s, and is simultaneously supplied to the operating steam generator 12 at a flow rate of 11.2L / s in alcohol supply line 222 and alcohol branch line 23. At this time, the liquid oxygen and alcohol required by the steam generator 12 to be started are already circulating in the corresponding reflux lines. The ignition program for the newly added steam generator 12 is started. The alcohol reflux regulator Kf and the liquid oxygen reflux regulator 361Ko begin to close gradually and cooperate with the opening of the spark plug of the steam generator 12. The liquid oxygen main valve 31 opens after a 2-second delay, the alcohol main valve 21 opens rapidly after a 50-second delay, and the softened water main valve 41 opens after a 50-second delay, thereby ensuring the startup of the newly added steam generator 12 and increasing the steam flow rate.

[0097] Among them, PID (Proportional-Integral-Derivative) is a widely used engineering control technology. It adjusts the system error through three control methods: proportional, integral, and derivative, in order to achieve precise control. This embodiment will not be described in detail here.

[0098] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A steam supply system, characterized in that, include: The steam generator system (1) includes steam generator units (11) arranged in parallel. Each steam generator unit (11) includes three steam generators (12). The six steam generators (12) are connected to the steam supply pipeline (13) through steam branches. The steam branches are equipped with steam regulating valves (15). The steam supply pipeline (13) is connected to a venting pipeline (16). The venting pipeline (16) is equipped with a steam venting valve (14). An alcohol supply system (2) is provided to supply alcohol to a steam generator (12), and an alcohol main valve (21) is provided between the alcohol supply system (2) and each of the steam generators (12). Liquid oxygen supply system (3), which is used to supply liquid oxygen to the steam generator (12), and a liquid oxygen main valve (31) is provided between the liquid oxygen supply system (3) and each of the steam generators (12). A softened water supply system (4) is provided to supply softened water to the steam generator (12), and a main water valve (41) is provided between the softened water supply system (4) and each of the steam generators (12). The control system is communicatively connected to each of the steam generators (12), each of the steam venting valves (14), each of the alcohol main valves (21), each of the liquid oxygen main valves (31) and each of the water main valves (41), and is used to control the number of working units of the steam generators (12), and to control the opening degree of the alcohol main valves (21), the liquid oxygen main valves (31) and the water main valves (41) so that the steam flow rate of the steam generator system (1) can be adjusted in stages within the range of 50kg / s-300kg / s.

2. The steam supply system according to claim 1, characterized in that, The alcohol supply system (2) includes two sets of alcohol supply units (22), which correspond one-to-one with the two steam generator units (11). Each alcohol supply unit (22) includes an alcohol tank (221) and an alcohol supply pipeline (222). One end of the alcohol supply pipeline (222) is connected to the alcohol tank (221), and the other end is connected to the three steam generators (12) of the corresponding steam generator unit (11) through three alcohol branches (23). The main alcohol valve (21) is located on the alcohol branch (23). The alcohol supply pipeline (222) is equipped with an alcohol pump (24), an alcohol flow meter (25), a first temperature sensor (26), and a first pressure sensor (27). Each of the alcohol branch lines (23) is connected to an alcohol discharge line (28), and an alcohol discharge valve (281) is provided on the alcohol discharge line (28). The three alcohol discharge lines (28) of each alcohol supply unit (22) converge into an alcohol discharge main pipe (282), and the alcohol discharge main pipe (282) is connected to the corresponding alcohol tank (221). The alcohol pump (24), alcohol flow meter (25), first temperature sensor (26), first pressure sensor (27) and alcohol discharge valve (281) are all connected to the control system.

3. The steam supply system according to claim 2, characterized in that, The alcohol supply system (2) also includes an alcohol replenishment tank (29), which is connected to the two alcohol tanks (221) respectively and is used to replenish alcohol to the alcohol tanks (221).

4. The steam supply system according to claim 2, characterized in that, The alcohol supply pipeline (222) is connected to an alcohol return pipeline (210). One end of the alcohol return pipeline (210) away from the alcohol supply pipeline (222) is connected to the alcohol tank (221). The alcohol return pipeline (210) is equipped with an alcohol return regulating valve (2101) and an alcohol return check valve (2102). The alcohol return regulating valve (2101) is communicatively connected to the control system.

5. The steam supply system according to claim 1, characterized in that, The liquid oxygen supply system (3) includes a liquid oxygen tank (32) and two liquid oxygen supply pipelines (33). The two liquid oxygen supply pipelines (33) correspond one-to-one with the two steam generator units (11). One end of the liquid oxygen supply pipeline (33) is connected to the liquid oxygen tank (32), and the other end is connected to the three steam generators (12) of the corresponding steam generator unit (11) through three liquid oxygen branches (34). The liquid oxygen main valve (31) is set on the liquid oxygen branch (34), and the liquid oxygen branch (34) is equipped with a second temperature sensor (351) and a second pressure sensor (352). The liquid oxygen supply pipeline (33) is equipped with a liquid oxygen pump (353) and a liquid oxygen flow meter (354), and the liquid oxygen pump (353) and the liquid oxygen flow meter (354) are respectively connected to the control system.

6. The steam supply system according to claim 5, characterized in that, The liquid oxygen supply pipeline (33) is connected to a liquid oxygen return pipeline (36). One end of the liquid oxygen return pipeline (36) away from the liquid oxygen supply pipeline (33) is connected to the liquid oxygen tank (32). The liquid oxygen return pipeline (36) is equipped with a liquid oxygen return regulating valve (361), a liquid oxygen return flow meter (362), and a liquid oxygen check valve (363). The liquid oxygen return pipeline (36) is connected to a first venting pipeline (310), and a first venting valve (311) is provided on the first venting pipeline (310). The liquid oxygen supply pipeline (33) is connected to a second venting pipeline (312), and a second venting valve (313) is provided on the second venting pipeline (312). A precooling pipeline (37) is connected between the liquid oxygen return pipeline (36) and the liquid oxygen supply pipeline (33), and the precooling pipeline (37) is equipped with a precooling valve (371). The liquid oxygen supply pipeline (33) is equipped with a liquid oxygen filter (38). The liquid oxygen reflux regulating valve (361), the liquid oxygen reflux flow meter (362), the precooling valve (371), and the second venting valve (313) are all communicatively connected to the control system.

7. The steam supply system according to claim 6, characterized in that, Each of the liquid oxygen branches (34) is connected to a liquid oxygen discharge pipeline (39), and the liquid oxygen discharge pipeline (39) is equipped with a liquid oxygen discharge valve (391). The three liquid oxygen discharge pipelines (39) corresponding to each liquid oxygen supply pipeline (33) converge into a liquid oxygen discharge main pipe (392), which is connected to the liquid oxygen tank (32).

8. The steam supply system according to claim 1, characterized in that, The softened water supply system (4) includes a water storage tank (42) and two softened water supply pipelines (43). The two softened water supply pipelines (43) correspond one-to-one with the two steam generator units (11). One end of the softened water supply pipeline (43) is connected to the water storage tank (42), and the other end is connected to the three steam generators (12) of the corresponding steam generator unit (11) through three softened water branch lines (44). The main water valve (41) is installed on the softened water branch line (44). The softened water branch line (44) is also equipped with a water-electric regulating valve (45) and a third pressure sensor (46). The softened water supply pipeline (43) is equipped with a water pump (471) and a softened water flow meter (472). The electric water regulating valve (45), the water pump (471), the softened water flow meter (472), and the third pressure sensor (46) are all connected to the control system in communication. The softened water supply pipeline (43) is connected to a softened water discharge pipeline (48). One end of the softened water discharge pipeline (48) away from the softened water supply pipeline (43) is connected to the water storage tank (42). A softened water discharge valve (481) is provided on the softened water discharge pipeline (48). The softened water discharge valve (481) is communicatively connected to the control system.

9. The steam supply system according to claim 1, characterized in that, The rated flow rate of the steam generator (12) is 11.2 L / s and the pressure is 2.35 MPa; the flow rate of liquid oxygen is 9.8 L / s and the pressure is 2.8 MPa; the flow rate of softened water is 26.6 L / s and the pressure is 4 MPa. The rated steam generation capacity of the steam generator (12) is 50 kg / s, the rated steam temperature is 300°C, and the rated steam pressure is 1.3 MPa. The softened water inlet pressure of the steam generator (12) is 4 MPa, and the flow rate is 26.6 L / s.

10. A steam supply method, characterized in that, Applied to the steam supply system as described in any one of claims 1-9, the steam supply method comprises the following steps: S1. Determine whether the target flow rate is 0-50 kg / s and the initial operating condition is 50 kg / s. If yes, the start-up scheme is to control one of the steam generators (12) of the steam generator unit (11) to work, and the step-by-step adjustment scheme is to adjust the steam vent valve (14). If no, proceed to step S2. S2. Determine whether the target flow rate is 50kg / s-100kg / s and the initial operating condition is 0-50kg / s. If yes, the start-up scheme is to control one of the steam generators (12) of the steam generator unit (11) to work and adjust the steam vent valve (14). The step-by-step adjustment scheme is to control one of the steam generators (12) of another steam generator unit (11) to work and adjust the steam vent valve (14). If no, proceed to step S3. S3. Determine whether the target flow rate is 100kg / s-150kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators (12) of the steam generator unit (11) to work and adjust the steam vent valve (14). The step-by-step adjustment scheme is to control two of the steam generators (12) of another steam generator unit (11) to work and adjust the steam vent valve (14). If no, proceed to step S4. S4. Determine whether the target flow rate is 100kg / s-150kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators (12) of one of the steam generator units (11) to work, and coordinate with the adjustment of the steam vent valve (14). The step-by-step adjustment scheme is to control one of the steam generators (12) of another steam generator unit (11) to work, and coordinate with the adjustment of the steam vent valve (14). If no, proceed to step S5. S5. Determine whether the target flow rate is 150kg / s-200kg / s and the initial operating condition is 0-50kg / s. If yes, the startup scheme is to control one of the steam generators (12) of the steam generator unit (11) to work and adjust the steam vent valve (14). The step-by-step adjustment scheme is to control three of the steam generators (12) of another steam generator unit (11) to work and adjust the steam vent valve (14). If no, proceed to step S6. S6. Determine whether the target flow rate is 150kg / s-200kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators (12) of one of the steam generator units (11) to work, and adjust the steam vent valve (14) accordingly. The step-by-step adjustment scheme is to control two of the steam generators (12) of another steam generator unit (11) to work, and adjust the steam vent valve (14) accordingly. If no, proceed to step S7. S7. Determine whether the target flow rate is 150kg / s-200kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators (12) of one of the steam generator units (11) to work, and adjust the steam vent valve (14) accordingly. The cascade adjustment scheme is to control one of the steam generators (12) of another steam generator unit (11) to work, and adjust the steam vent valve (14) accordingly. If no, proceed to step S8. S8. Determine whether the target flow rate is 200kg / s-250kg / s and the initial operating condition is 50kg / s-100kg / s. If yes, the startup scheme is to control two of the steam generators (12) of one of the steam generator units (11) to work, and coordinate with the adjustment of the steam vent valve (14). The step-by-step adjustment scheme is to control three of the steam generators (12) of another steam generator unit (11) to work, and coordinate with the adjustment of the steam vent valve (14). If no, proceed to step S9. S9. Determine whether the target flow rate is 200kg / s-250kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators (12) of one of the steam generator units (11) to work, and coordinate with the adjustment of the steam vent valve (14). The step-by-step adjustment scheme is to control two of the steam generators (12) of another steam generator unit (11) to work, and coordinate with the adjustment of the steam vent valve (14). If no, proceed to step S10. S10. Determine whether the target flow rate is 250kg / s-300kg / s and the initial operating condition is 100kg / s-150kg / s. If yes, the startup scheme is to control three of the steam generators (12) of one of the steam generator units (11) to work, and coordinate with the adjustment of the steam vent valve (14). The step adjustment scheme is to control three of the steam generators (12) of another steam generator unit (11) to work. If no, the process ends.

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