A supercritical carbon dioxide unit group auxiliary gas and working medium management integrated system

Abstract

The application provides a supercritical carbon dioxide unit group auxiliary gas and working medium management integrated system, and belongs to the technical field of supercritical carbon dioxide cycle power generation, which can at least partially solve the problems of low shutdown working medium recovery efficiency, and direct waste of a large amount of high-grade carbon dioxide in the shutdown stage of the existing supercritical carbon dioxide unit group. The application comprises an auxiliary gas main pipe, a working medium recovery module, a gasification and pressurization module, a working medium supplement module and a supercritical carbon dioxide unit group. The application adopts a parallel structure of a first main pipe and a second main pipe, realizes connection through a first connecting pipe and a second connecting pipe, supports partition gas supply, fault bypass and pressure equalization mutual backup, significantly improves gas supply continuity and system redundancy, the working medium recovery module condenses and liquefies gaseous carbon dioxide and recycles it into a tank during shutdown, cooperates with a variable frequency recovery pump and a two-stage cooling type condenser to reduce energy consumption and peak load, and simultaneously reduces system pressure and emission risk.

Description

Technical Field

[0001] This invention belongs to the field of supercritical carbon dioxide cycle power generation technology, specifically relating to an integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group. Background Technology

[0002] With the development of power generation technology, supercritical carbon dioxide, as an excellent working medium to replace water vapor, has attracted the attention of many researchers due to its higher cycle efficiency, more compact equipment layout, and more economical initial investment. In particular, supercritical carbon dioxide cycle power generation is more suitable for working environments that require long-term operation and a high degree of automation, such as ships and offshore work platforms.

[0003] However, there is still considerable room for improvement in supercritical carbon dioxide cycle power generation systems, particularly in multi-unit or integrated systems. Currently, existing supercritical carbon dioxide units suffer from low working fluid recovery efficiency during shutdown, resulting in the direct release and waste of large amounts of high-grade carbon dioxide during downtime. Therefore, we propose an integrated system for managing auxiliary gas and working fluid in supercritical carbon dioxide unit clusters. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and to provide an integrated system for the management of auxiliary gas and working fluid in supercritical carbon dioxide generator groups.

[0005] This invention provides an integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group, comprising: An auxiliary gas main pipe, which includes a first main pipe and a second main pipe, wherein the first main pipe is provided with a first connecting pipe and a second connecting pipe for connecting the second main pipe; The working fluid recovery module includes a condenser connected to the second connecting pipe, a recovery pump connected to the condenser pipeline, and a liquefied carbon dioxide storage tank connected to the recovery pump pipeline. The vaporization booster module includes a delivery pump connected to the liquefied carbon dioxide storage tank pipeline, an evaporator connected to the delivery pump pipeline, and a gaseous carbon dioxide storage tank connected to the evaporator pipeline. The working fluid replenishment module includes a booster pump connected to the gaseous carbon dioxide storage tank pipeline for replenishing the supercritical carbon dioxide unit group with carbon dioxide working fluid during operation; and The supercritical carbon dioxide generator group includes at least two supercritical carbon dioxide generators, each of which is connected to the first main pipe via a first connecting pipe and to the second main pipe via a second connecting pipe.

[0006] Furthermore, the integrated auxiliary gas and working fluid management system also includes a miscellaneous gas source module, which includes a gas storage tank connected to the first main pipe. The gas storage tank is connected to a pressure reducing component pipeline, and the pressure reducing component is connected to a temporary storage tank pipeline.

[0007] Specifically, the pressure reducing assembly includes a primary self-regulating pressure reducing valve and a secondary self-regulating pressure reducing valve arranged in series.

[0008] Specifically, a first pressure regulating valve group is provided on the first main pipe.

[0009] Preferably, a second pressure regulating valve assembly is provided on the second main pipe.

[0010] Specifically, the first pressure regulating valve group and the second pressure regulating valve group each include a manual isolation valve, an automatic regulating valve, an automatic shut-off valve, and a check valve.

[0011] Furthermore, the booster pump is a variable frequency booster pump.

[0012] Furthermore, the condenser is a two-stage cooling condenser.

[0013] Furthermore, the recovery pump is a variable frequency recovery pump.

[0014] Specifically, the integrated auxiliary gas and working fluid management system also includes a sealing gas source module, which includes a pressurizing pump connected to the gas storage tank pipeline. The pressurizing pump is connected to the dry gas sealing heater pipeline to provide sealing gas to the supercritical carbon dioxide unit during operation.

[0015] The beneficial effects of this invention are as follows: The system adopts a parallel architecture of the first and second main pipes, which are connected through the first and second connecting pipes. It supports zoned gas supply, fault bypass and pressure equalization backup, which significantly improves the continuity of gas supply and system redundancy. The working fluid recovery module condenses and liquefies gaseous carbon dioxide and returns it to the tank when the system is shut down. In conjunction with the variable frequency recovery pump and the two-stage cooling condenser, it reduces energy consumption and peak load, while reducing system pressure and emission risks. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection of an integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group, according to a specific embodiment of the present invention.

[0017] Among them, 1 is the first main pipe, 2 is the second main pipe, 3a is the first pressure regulating valve group, 3b is the second pressure regulating valve group, 4 is the condenser, 5 is the recovery pump, 6 is the liquid carbon dioxide storage tank, 7 is the evaporator, 8 is the transfer pump, 9 is the gaseous carbon dioxide storage tank, 10 is the booster pump, 11 is the gas storage tank, 12 is the pressurization pump, 13 is the dry gas sealing heater, 14 is the pressure reducing component, 15 is the temporary storage tank, 16a is the first isolation valve group, 16b is the second isolation valve group, 17a is the third isolation valve group, and 17b is the fourth isolation valve group. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown in the figure, a specific embodiment of the present invention provides an integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group, comprising: An auxiliary gas header includes a first header 1 and a second header 2, with a first connecting pipe and a second connecting pipe on the first header 1 connecting to the second header 2; a working fluid recovery module includes a condenser 4 connected to the second connecting pipe, a recovery pump 5 connected to the condenser 4 via a pipeline, and a liquefied carbon dioxide storage tank 6 connected to the recovery pump 5 via a pipeline; a vaporization pressurization module includes a delivery pump 8 connected to the liquefied carbon dioxide storage tank 6 via a pipeline, an evaporator 7 connected to the delivery pump 8 via a pipeline, and a gaseous carbon dioxide storage tank connected to the evaporator 7 via a pipeline. Tank 9; working fluid replenishment module, including a booster pump 10 connected to the gaseous carbon dioxide storage tank 9 for replenishing the supercritical carbon dioxide generator group with carbon dioxide working fluid during operation; and supercritical carbon dioxide generator group, including at least two supercritical carbon dioxide generators, each of which is connected to a first main pipe 1 via a first connecting pipe and to a second main pipe 2 via a second connecting pipe; wherein, the first main pipe 1 is a high-pressure main pipe and the second main pipe 2 is a low-pressure main pipe; wherein, the supercritical carbon dioxide generators are set up independently.

[0020] Specifically, taking two supercritical carbon dioxide generator units as an example, one unit is connected to the first main pipe 1 and the second main pipe 2 through a first delivery pipe with a first isolation valve group 16a and a second delivery pipe with a second isolation valve group 16b, respectively. The other unit is connected to the first main pipe 1 and the second main pipe 2 through a third delivery pipe with a third isolation valve group 17a and a fourth delivery pipe with a fourth isolation valve group 17b, respectively. Each isolation valve group is not a single valve, but should include no less than: manual isolation valve, automatic regulating valve, automatic shut-off valve, check valve, etc. The specific valve selection should be combined with the specific project.

[0021] Furthermore, the auxiliary gas header serves as the main auxiliary gas distribution channel for the unit group, responsible for distributing the gas source to each unit and gas consumption point after centralized pressure regulation. The connection, isolation, and pressure equalization of the two headers are achieved through the first and second connecting pipes, facilitating zoned gas supply, fault bypass, and operating condition switching, thereby improving gas supply stability and maintainability. When the unit is shut down or under maintenance, the working fluid recovery module sends the gaseous carbon dioxide in the system to the condenser 4 for condensation and liquefaction, reducing system pressure and emissions. The condensate is then transported to the liquefied carbon dioxide storage tank 6 by the recovery pump 5, realizing closed-loop recovery and storage of the working fluid, reducing replenishment needs, and improving safety and economy.

[0022] Furthermore, a vaporization and pressurization module is installed. When gas needs to be supplied to the gaseous side, the delivery pump 8 sends the liquid carbon dioxide in the storage tank into the evaporator for vaporization, generating a stable gas source. The vaporized carbon dioxide enters the gaseous carbon dioxide storage tank 9 to form a buffer and pressure stabilization capacity, and can provide appropriate pressure and flow to the gas main pipe or related gas consumption points as needed. During unit startup, ramp-up, and operational fluctuations, the working fluid replenishment module replenishes the working fluid from the gaseous carbon dioxide storage tank 9 to the unit's circulation loop through the booster pump 10, quickly building up pressure and maintaining the stability of the system's charge volume and pressure. This is used to compensate for losses caused by leakage or venting, and to ensure the continuity and efficiency of multi-unit coordinated operation.

[0023] Based on the above basic implementation method, the auxiliary gas and working fluid management integrated system also includes a miscellaneous gas source module. The miscellaneous gas source module includes a gas storage tank 11 connected to the first main pipe 1. The gas storage tank 11 is connected to the pressure reducing component 14 via pipeline. The pressure reducing component 14 is connected to the temporary storage tank via pipeline. The pressure reducing component 14 includes a primary self-regulating pressure reducing valve and a secondary self-regulating pressure reducing valve arranged in series.

[0024] Specifically, the miscellaneous gas source module provides a stable and adjustable carbon dioxide gas source for non-critical gas usage scenarios; it achieves capacity buffering and pressure stabilization through the gas storage tank 11 connected to the first main pipe 1; it adopts a series of primary and secondary self-regulating pressure reducing valves to reduce the upstream high pressure to a safe and usable range in stages, reducing pressure fluctuations and water hammer impacts, and protecting downstream equipment and pipelines; it supplies gas to the temporary storage tank 15 to meet short-term peak demand and miscellaneous gas usage such as maintenance, purging, replacement, pneumatic valves and instrument gas; and it provides temporary bypass gas supply when the main pipe is shut down or under maintenance, ensuring on-site continuity and emergency support capabilities.

[0025] In one specific embodiment, a first pressure regulating valve group 3a is provided on the first main pipe 1; a second pressure regulating valve group 3b is provided on the second main pipe 2; the first pressure regulating valve group 3a and the second pressure regulating valve group 3b include at least a manual isolation valve, an automatic regulating valve, an automatic shut-off valve, and a check valve.

[0026] In this embodiment, the booster pump 10 is a variable frequency booster pump; the condenser 4 is a two-stage cooling condenser; the recovery pump 5 is a variable frequency recovery pump; the first stage of the condenser 4 cools the carbon dioxide gas to 5~15℃, and the second stage condenses the gas into a liquid state; the recovery pumps 5 are connected in parallel, and the rated recovery flow rate of a single pump is not less than 60% / h of the rated working fluid flow rate of the corresponding unit; a liquid phase filter and an online purity monitor are installed at the outlet of the condenser 4.

[0027] Furthermore, the purpose and function of setting up the first pressure regulating valve group 3a and the second pressure regulating valve group 3b is to achieve independent pressure regulation and mutual backup of the two main pipes, ensuring that different units and gas-consuming branches obtain matching pressure and flow; to stabilize the pressure according to real-time operating conditions through automatic regulating valves, suppressing pressure shocks and oscillations caused by start-up, shutdown and load fluctuations; to achieve segmented isolation and valve replacement for maintenance using manual isolation valves, reducing the scope of downtime and improving maintainability; to quickly cut off the flow of the automatic shut-off valve when overpressure, leakage or abnormal flow occurs, blocking the spread of the accident and protecting downstream equipment; to prevent backflow and crosstalk between main pipes by relying on check valves, keeping the system medium under unidirectional control; and to achieve pressure equalization and soft switching when multiple units are running in parallel, improving the continuity of gas supply, redundancy and overall safety and reliability.

[0028] In another specific embodiment, the integrated auxiliary gas and working fluid management system also includes a sealing gas source module, which includes a pressurization pump 12 connected to the gas storage tank 11 via a pipeline. The pressurization pump 12 is connected to the dry gas sealing heater 13 via a pipeline to provide sealing gas to the supercritical carbon dioxide unit during operation.

[0029] Specifically, the sealing gas source module provides a continuous, clean, and stable pressurized gas source for the dry gas seal under all operating conditions of the unit, establishing and maintaining a slight positive pressure differential higher than that of the working fluid inside the cavity to prevent carbon dioxide leakage. The pressurization pump 12 achieves pressure boosting and rapid response, ensuring the integrity of the seal during transient events such as start-up, load increases and decreases, and tripping. The dry gas seal heater 13 increases the gas source temperature, preventing frost formation, dry ice precipitation, and condensation at the cold end, reducing the risk of wear and jamming on the sealing surface. It works in conjunction with the main pipe and gas storage tank to form a buffer, suppressing pressure fluctuations and extending the life of the seal and bearings. It reduces harmful emissions and the need for turning gear purging, improving system safety, environmental protection, and availability. It provides independent sealing protection during partial maintenance or zone shutdown, avoiding downtime and cascading accidents caused by seal failure. The dry gas seal heater is a series-connected submerged electric heater and an external heat exchange coil, with a vaporization capacity of not less than 30% of the unit's rated flow rate.

[0030] In one specific implementation, during a black start or initial start-up of the system, external liquid carbon dioxide is stored in a liquid carbon dioxide storage tank 6. The liquid carbon dioxide is heated and vaporized by an evaporator 7, and then transported to a gaseous carbon dioxide storage tank 9 via a transfer pump 8. The gaseous carbon dioxide storage tank 9 opens the pipeline corresponding to the starting unit, charging the gaseous carbon dioxide working fluid to the system's minimum starting pressure. The setting of the minimum starting pressure should comprehensively consider the specific operating pressure range of each piece of equipment, especially rotating equipment such as compressors. If the system is not starting for the first time, there is residual pressure in the first header pipe 1 and the second header pipe 2, and the working fluid has not been recovered by the recovery module. The pressure in the second header pipe 2 can be maintained consistent with the unit pressure through various isolation valve groups connected to the first and second pressure regulating valve groups. If the pressure still does not meet the minimum starting requirements, it can be handled according to the "black start" or "initial start" conditions.

[0031] In this embodiment, the preparation of the sealing gas system can be divided into two scenarios. First, the external gas source stage, where the sealing gas is supplied to the corresponding unit's operating equipment via the gas storage tank 11, the pressurizing pump 12, and the dry gas sealing heater 13. Second, internal unit supply, where the gas is drawn from a branch line of the unit system and supplied to the corresponding unit's operating equipment. The first scenario typically occurs during the system preparation stage and the initial startup phase, generally during the period when the unit's compressor is running at low speed. To ensure sufficient pressure and flow of the sealing gas, the upstream of the gas storage tank 11—the first main pipe 1—must be isolated from the second main pipe 2, and the pressure on the first main pipe 1 must be at least higher than the current pressure of the unit. After the unit is running stably, the pressurizing pump 12 and the dry gas sealing heater 13 can be taken out of service, and the sealing gas can switch to the second operating mode.

[0032] Regarding operating conditions, in addition to adjustments on the heat source side, the unit side can also adjust the load by selecting to recover excess working fluid to the second main pipe 2 through the first isolation valve group, and replenishing the high-pressure working fluid of the first main pipe 1 to the unit side through the second isolation valve group 16b, thereby achieving rapid load adjustment. It is worth noting that when the working fluid interacts with the unit and auxiliary gas system, there should be interlocking protection, allowing only one unit's dual isolation valve group to operate, and they must not be opened simultaneously to prevent disruption of the pressure parameters of the high-pressure main pipe 1 and the low-pressure main pipe 2. For example, when adjusting the load of Unit I, while the first and second isolation valve groups are operating, the third and fourth isolation valve groups 17b of Unit II are forcibly closed and not allowed to be operated. Regarding shutdown operations, during the shutdown process, in addition to necessary safety venting, excess high-grade working fluid should be collected into the first main pipe 1 and the second main pipe 2 respectively for pressure maintenance, awaiting further operational commands. If there is a startup plan within 48 hours, follow the procedures for non-first-time startups as described above. If there is no startup plan in the short term, the system working fluid will be recovered in liquid form to the liquid carbon dioxide storage tank 6 via condenser 4 and recovery pump 5. Liquid carbon dioxide stored for extended periods should undergo a purity test before the next startup. Regarding maintenance work, residual pressure in the system should be prevented after working fluid recovery. The maintenance unit and the operating unit should be physically isolated. During maintenance, temporary carbon dioxide must be drawn from the temporary storage tank 15. During unit operation, except for necessary users requiring gas supply for maintenance, prolonged use of the temporary storage tank 15 is prohibited.

[0033] Specifically, the system adopts a central dispatch control system, which communicates bidirectionally with each module and the unit's DCS to achieve unified dispatch, mutually exclusive operation, and priority management of the unit group. The unit DCS is a control system that distributes the measurement, control, interlocking, sequential control, alarm, screen monitoring, and data recording functions of a unit to multiple controllers for execution, and then manages and displays them uniformly through an industrial network. The gaseous carbon dioxide storage tank 9 is designed with a rated working pressure of 7MPa; the gas storage tank 11 is designed with a rated working pressure of 10MPa; the dry gas sealing heater 13 requires the sealing gas heat exchanger outlet temperature to meet the design requirements of the system's operation, and it is recommended to control the outlet temperature range of 80~110℃; the number and location of the temporary storage tanks 15 should be determined comprehensively based on the site environment and user needs. Common users include: replacement of decaying gases, purging of field instruments, and calibration of working fluid purity; the central dispatch and control system includes: a main pipe pressure priority control strategy to ensure that the main pipe pressure overshoot is ≤±50% when any unit is recovering or replenishing; a mutual exclusion lock mechanism, allowing only one unit to perform recovery or replenishment operations at a time; a priority queue: units under maintenance > units starting up > units in normal operation; a redundant measurement chain: triple redundancy of pressure, temperature, and flow, with self-diagnosis and self-recovery functions; the system's working fluid recovery rate is ≥95%, and the total time from unit shutdown to completion of recovery is ≤30 minutes. The system's replenishment rate is adjustable, and it completes 90% replenishment of the unit's rated working fluid mass within 15 minutes.

[0034] To aid in a better understanding of the invention, a more comprehensive and specific embodiment is described, in which the invention provides an integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group, comprising: The system includes an auxiliary gas header, comprising a first header 1 and a second header 2, with a first connecting pipe and a second connecting pipe on the first header 1 connecting to the second header 2; a working fluid recovery module, comprising a condenser 4 connected to the second connecting pipe, a recovery pump 5 connected to the condenser 4 via a pipeline, and a liquefied carbon dioxide storage tank 6 connected to the recovery pump 5 via a pipeline; a vaporization pressurization module, comprising a delivery pump 8 connected to the liquefied carbon dioxide storage tank 6 via a pipeline, an evaporator 7 connected to the delivery pump 8 via a pipeline, and a gaseous carbon dioxide storage tank 9 connected to the evaporator 7 via a pipeline; a working fluid replenishment module, comprising a booster pump 10 connected to the gaseous carbon dioxide storage tank 9 via a pipeline for replenishing the supercritical carbon dioxide unit group with carbon dioxide working fluid during operation; and a supercritical carbon dioxide unit group, comprising at least two supercritical carbon dioxide units, each of which is connected to the first header 1 via a first connecting pipe and to the second header 2 via a second connecting pipe.

[0035] In this embodiment, the integrated auxiliary gas and working fluid management system also includes a miscellaneous gas source module. This miscellaneous gas source module includes a gas storage tank 11 connected to the first main pipe 1. The gas storage tank 11 is connected to the pressure reducing component 14 via pipeline, and the pressure reducing component 14 is connected to the temporary storage tank 15 via pipeline. The pressure reducing component 14 includes a primary self-regulating pressure reducing valve and a secondary self-regulating pressure reducing valve arranged in series. A first pressure regulating valve group 3a is provided on the first main pipe 1. A second pressure regulating valve group 3b is provided on the second main pipe 2. Each of the first pressure regulating valve group 3a and the second pressure regulating valve group 3b includes at least a manual isolation valve, an automatic regulating valve, an automatic shut-off valve, and a check valve. The booster pump 10 is a variable frequency booster pump. The condenser 4 is a two-stage cooling condenser. The recovery pump 5 is a variable frequency recovery pump.

[0036] Furthermore, the integrated auxiliary gas and working fluid management system also includes a sealing gas source module, which includes a pressurization pump 12 connected to the gas storage tank 11 via a pipeline. The pressurization pump 12 is connected to the dry gas sealing heater 13 via a pipeline to provide sealing gas to the supercritical carbon dioxide unit during operation.

[0037] In summary, the embodiments disclosed herein have at least the following technical effects: It enables integrated management of auxiliary gas and carbon dioxide working fluid, forming a closed loop of recovery, storage, gasification, pressurization, replenishment, and sealed gas supply, reducing the need for venting and replenishment, and improving the system's economy and environmental friendliness. The system adopts a parallel architecture of the first main pipe 1 and the second main pipe 2, and achieves connection and isolation through the first and second connecting pipes. It supports zoned gas supply, fault bypass and pressure equalization backup, which significantly improves the continuity of gas supply and system redundancy. The working fluid recovery module condenses and liquefies gaseous carbon dioxide and returns it to the tank when the system is shut down. In conjunction with the variable frequency recovery pump and the two-stage cooling condenser, it reduces energy consumption and peak load, while reducing system pressure and emission risks. The vaporization booster module stably vaporizes liquid carbon dioxide and establishes a gaseous buffer. Combined with the delivery pump and evaporator, it achieves stable and controllable gas supply pressure and flow, suppressing fluctuations in operating conditions. The working fluid replenishment module uses a variable frequency booster pump to replenish the circulating working fluid as needed, supporting rapid start-up, load ramping, and stable operating pressure, maintaining the charge and thermal performance of the unit group. The pressure regulating valve group is equipped with a manual isolation valve, an automatic regulating valve, an automatic shut-off valve and a check valve, which takes into account pressure stabilization control, one-way backflow prevention, rapid cut-off in case of abnormality and segmented maintenance, thereby improving intrinsic safety and maintainability. The miscellaneous gas source module achieves capacity buffering and multi-scenario gas supply through a gas storage tank and a two-stage self-regulating pressure reduction system, meeting the needs of purging, replacement, instrumentation and maintenance, and enhancing on-site flexibility and emergency response capabilities; the sealing gas source module provides stable, clean and appropriately temperature-controlled sealing gas through a pressurization pump and a dry gas sealing heater, establishing a slight positive pressure differential to prevent leakage, avoid low-temperature frost and dry ice precipitation, and extend the life of seals and shaft systems; The system adopts a modular and variable frequency design to reduce energy consumption and operating costs, simplify control logic and operation and maintenance processes, and adapt to the parallel expansion of multiple units and safe and efficient operation under different working conditions.

[0038] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group, characterized in that, include: An auxiliary gas main pipe, which includes a first main pipe and a second main pipe, wherein the first main pipe is provided with a first connecting pipe and a second connecting pipe for connecting the second main pipe; The working fluid recovery module includes a condenser connected to the second connecting pipe, a recovery pump connected to the condenser pipeline, and a liquefied carbon dioxide storage tank connected to the recovery pump pipeline. The vaporization booster module includes a delivery pump connected to the liquefied carbon dioxide storage tank pipeline, an evaporator connected to the delivery pump pipeline, and a gaseous carbon dioxide storage tank connected to the evaporator pipeline. The working fluid replenishment module includes a booster pump connected to the gaseous carbon dioxide storage tank pipeline for replenishing the supercritical carbon dioxide unit group with carbon dioxide working fluid during operation. The supercritical carbon dioxide generator group includes at least two supercritical carbon dioxide generators, each of which is connected to the first main pipe via a first connecting pipe and to the second main pipe via a second connecting pipe; and A miscellaneous gas source module includes a gas storage tank connected to the first main pipe, the gas storage tank being connected to a pressure reducing component pipeline, and the pressure reducing component being connected to a temporary storage tank pipeline.

2. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 1, characterized in that, The pressure reducing assembly includes a primary self-regulating pressure reducing valve and a secondary self-regulating pressure reducing valve arranged in series.

3. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 1, characterized in that, The first main pipe is equipped with a first pressure regulating valve group.

4. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 3, characterized in that, A second pressure regulating valve assembly is installed on the second main pipe.

5. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 4, characterized in that, The first pressure regulating valve group and the second pressure regulating valve group each include a manual isolation valve, an automatic regulating valve, an automatic shut-off valve, and a check valve.

6. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 1, characterized in that, The booster pump is a variable frequency booster pump.

7. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to claim 1, characterized in that, The condenser is a two-stage cooling condenser.

8. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator group according to claim 1, characterized in that, The recovery pump is a variable frequency recovery pump.

9. The integrated system for managing auxiliary gas and working fluid in a supercritical carbon dioxide generator unit group according to any one of claims 1 to 8, characterized in that, The integrated auxiliary gas and working fluid management system also includes a sealing gas source module, which includes a pressurizing pump connected to the gas storage tank pipeline. The pressurizing pump is connected to the dry gas sealing heater pipeline to provide sealing gas to the supercritical carbon dioxide unit during operation.

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