Steam compressor system, driving method and pressurized water reactor steam supply system

Abstract

The present invention relates to a steam compressor system, a driving method and a pressurized water reactor steam supply system. The steam compressor system is connected to a pressurized water reactor, and the pressurized water reactor comprises three loops for outputting steam. The steam compressor system comprises: a driving mechanism connected to the three loops of the pressurized water reactor; and a steam compressor connected to the driving mechanism, wherein the driving mechanism can drive the steam compressor to compress the steam output by the three loops. The present invention effectively improves parameters of the steam output by the pressurized water reactor by coupling the steam compressor with the three loops of the pressurized water reactor, and can adapt to different output requirements for medium-pressure / high-pressure superheated steam by means of a plurality of variations based on the internal structure of the steam compressor.

Description

Steam compressor system, driving method and pressurized water reactor steam supply system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application 202311757387.0, filed on December 19, 2023, entitled “Steam compressor system, driving method and applicable pressurized water reactor steam supply system,” and the entire contents of that application are incorporated herein by reference. Technical Field

[0003] The present invention relates to the field of steam compressors, and in particular to a steam compressor system, a driving method and a pressurized water reactor steam supply system. Background Art

[0004] Existing steam compressors and related equipment are primarily used in general steam processing scenarios and are not suitable for nuclear power generation. Furthermore, it is difficult to generate medium- and high-pressure superheated steam for industrial use in existing PWR nuclear power generation scenarios. This is primarily due to the inherent steam parameter limitations of PWR units, which typically limit the steam parameters of existing PWR nuclear power units to low-pressure superheated steam.

[0005] To address this issue, solutions such as combining a pressurized water reactor (PWR) with a high-temperature gas-cooled reactor (HTGR) have been adopted in the field. However, this approach is costly, complex, and the steam output is still insufficient to generate industrial-grade high-pressure superheated steam. Therefore, how to modify the steam compressor and couple it with the PWR system to produce medium- and high-pressure superheated steam remains an urgent challenge in this field.

[0006] Summary of the Invention

[0007] In response to the deficiencies in the prior art, the present invention provides a steam compressor system, a driving method, and a pressurized water reactor steam supply system. By coupling the steam compressor with the three-circuit pressurized water reactor, the pressurized water reactor can effectively output clean medium- and high-pressure superheated steam.

[0008] A first aspect of the present invention provides a steam compressor system connected to a pressurized water reactor, wherein the pressurized water reactor includes three circuits for outputting steam. The steam compressor system includes: a drive mechanism connected to the three circuits of the pressurized water reactor; and a steam compressor connected to the drive mechanism; wherein the drive mechanism is capable of driving the steam compressor to compress the output steam of the three circuits.

[0009] Preferably, the driving mechanism comprises a steam turbine or an electric motor.

[0010] Preferably, the driving mechanism further comprises a coupling, and the steam compressor is connected to the steam turbine or the electric motor via the coupling.

[0011] Preferably, the steam compressor system includes a single-cylinder steam compressor system or a double-cylinder steam compressor system, wherein, when the steam compressor system is a single-cylinder steam compressor system, the number of steam compressors connected to the steam turbine or motor is 1; when the steam compressor system is a double-cylinder steam compressor system, the number of steam compressors connected to the steam turbine or motor is 2.

[0012] Preferably, when the driving mechanism is a steam turbine, the driving gas source of the steam turbine is the output steam of the three-circuit system.

[0013] Preferably, the steam compressor system further includes a gearbox connected between the steam compressor and the driving mechanism.

[0014] Preferably, a gearbox is provided when the speed requirement of the steam compressor meets a preset condition range, wherein the preset condition range is set according to a pressure ratio parameter of the steam compressor, and the pressure ratio parameter includes the ratio between the steam at the output end and the steam at the input end of the steam compressor.

[0015] A second aspect of the present invention provides a method for driving a steam compressor system, which drives the steam compressor system provided by the first aspect of the present invention, comprising the following steps:

[0016] connecting the drive mechanism to the tertiary circuit of the pressurized water reactor;

[0017] Output steam from the third circuit to the steam compressor;

[0018] The driving mechanism drives the steam compressor to compress the output steam from the three circuits.

[0019] The third aspect of the present invention provides a pressurized water reactor steam supply system, comprising: a pressurized water reactor, the pressurized water reactor including three circuits for outputting steam; the steam compressor system provided by the first aspect of the present invention, the steam compressor system connected to the three circuits; and a steam user end connected to the steam compressor system.

[0020] Preferably, the three-circuit system includes a desalted water tank, a preheater, a deaerator, a heater, a steam generator, a make-up water pump and a booster pump, wherein the desalted water tank is used to provide desalted water as the water source for the three-circuit system, and the desalted water passes through the preheater, deaerator, heater, steam generator in sequence and finally forms the three-circuit output steam to be transported to the steam compressor system.

[0021] The present invention effectively improves the steam parameters output by the pressurized water reactor by coupling the steam compressor with the three-circuit pressurized water reactor; and through various modifications based on the internal structure of the steam compressor, it can adapt to different medium and high pressure superheated steam output requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application.

[0023] FIG1 is a system block diagram of a steam compressor system connected to a pressurized water reactor according to a specific embodiment of the present invention;

[0024] 2 to 9 are structural block diagrams of a steam compressor and its connected drive mechanism in a steam compressor system according to different embodiments of the present invention;

[0025] FIG10 is a schematic flow chart of a method for driving a steam compressor system according to an embodiment of the present invention;

[0026] FIG11 is a system block diagram of a pressurized water reactor steam supply system according to an embodiment of the present invention;

[0027] FIG12 is a system block diagram of a pressurized water reactor steam supply system according to another embodiment of the present invention.

[0028] Reference numerals:

[0029] 10-Steam compressor system;

[0030] 11-steam compressor;

[0031] 12- driving mechanism;

[0032] 121-steam turbine;

[0033] 122-electric motor;

[0034] 123-coupling;

[0035] 124-gear box;

[0036] 20- driving method;

[0037] 30-PWR steam supply system;

[0038] 301-steam client;

[0039] 100-pressurized water reactor;

[0040] 101-first circuit;

[0041] 102-secondary circuit;

[0042] 103-three circuits;

[0043] 31-steam generator;

[0044] 32-heater;

[0045] 33-Desalted water tank;

[0046] 34-deaerator;

[0047] 35-preheater;

[0048] 36-boost pump;

[0049] 37-Water supply pump. DETAILED DESCRIPTION

[0050] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0051] There are currently two technical routes for supplying industrial steam with nuclear energy: one is to use the main steam of a pressurized water reactor as the heat source to heat the three-circuit desalted water to provide low-pressure superheated steam. The disadvantage of this solution is that it can only provide low-pressure superheated steam due to the limitations of the steam parameters of the pressurized water reactor nuclear power unit; the second is to combine a pressurized water reactor and a high-temperature gas-cooled reactor, making full use of the economy of the pressurized water reactor and the high steam temperature of the high-temperature gas-cooled reactor to provide medium and low-pressure superheated steam. The disadvantages of this solution are that the technical maturity of the high-temperature reactor needs to be further improved and verified, the construction cost is high and the economy is poor, the system is relatively complex, and it has not yet achieved the goal of nuclear power units supplying high-temperature and high-pressure industrial steam.

[0052] In view of the above problems, the present invention provides a steam compressor system, a driving method and a pressurized water reactor steam supply system, which utilize the heat of the nuclear energy of the pressurized water reactor and adopt a new type of steam compressor device to produce medium-pressure superheated steam or high-temperature and high-pressure superheated steam to meet the industrial steam parameter requirements of the chemical base, thereby achieving the purpose of comprehensive utilization of nuclear energy of the pressurized water reactor nuclear power unit.

[0053] FIG1 is a system block diagram showing a steam compressor system 10 connected to a pressurized water reactor 100 according to a specific embodiment of the present invention.

[0054] As shown in FIG1 , the steam compressor system 10 of this embodiment is connected to a pressurized water reactor 100 to compress the steam delivered by the pressurized water reactor 100 , thereby outputting medium-pressure or high-pressure steam.

[0055] The pressurized water reactor 100 includes a primary circuit 101 connected to the reactor core, a secondary circuit 102 isolated from the primary circuit and flowing through the steam generator tube side, and a tertiary circuit 103 using desalted water as a water source. The tertiary circuit 103 can heat the water source to output steam.

[0056] The steam compressor system 10 includes a steam compressor 11 and a drive mechanism 12. The drive mechanism 12 is connected to the tertiary circuit 103 of the pressurized water reactor 100 and can drive the steam compressor 11 to compress the output steam of the tertiary circuit 103.

[0057] The secondary circuit 102 of the pressurized water reactor 100 generates pressurized water reactor main steam. Using this main steam as a heat source, it preheats, deoxygenates, and heats the demineralized water in the tertiary circuit 103. Ultimately, the demineralized water in the tertiary circuit 103 is converted into low-pressure or medium-pressure steam, i.e., the output steam of the tertiary circuit 103. The output steam of the tertiary circuit 103 is delivered to the steam compressor system 10. The drive mechanism 12 drives the steam compressor 11 to compress the output steam of the tertiary circuit 103, generating medium-pressure or high-pressure steam.

[0058] The steam compressor system 10 of this embodiment can enable the pressurized water reactor nuclear power unit to supply industrial medium-pressure and high-pressure superheated steam. The system is simple and economical, and can maximize the use of pressurized water reactor nuclear power thermal energy.

[0059] FIG2 is a structural block diagram of a steam compressor system 10a according to a specific embodiment of the present invention; FIG3 is a structural block diagram of a steam compressor system 10b according to another specific embodiment of the present invention.

[0060] As shown in Figures 2 and 3, the driving mechanism 12 includes a steam turbine 121 or a motor 122. The driving mechanism 12 also includes a coupling 123, and the steam compressor 11 is connected to the steam turbine 121 or the motor 122 via the coupling 123.

[0061] Specifically, in the steam compressor system 10 a shown in FIG. 2 , the driving mechanism 12 is a steam turbine 121 ; and in the steam compressor system 10 b shown in FIG. 3 , the driving mechanism 12 is an electric motor 122 .

[0062] In the embodiment shown in FIG. 2 , when the driving mechanism 12 is a steam turbine 121 , the driving gas source of the steam turbine 121 may be the output steam of the three-circuit 103 .

[0063] In some preferred cases, the driving gas source for the drive mechanism 12 can be directly derived from the steam output from the tertiary circuit 103 of the pressurized water reactor 100 (for example, when the drive mechanism 12 is pneumatically driven). Furthermore, in this embodiment, the driving gas source for the drive mechanism 12 is preferably set to the steam output from the tertiary circuit 103, but the present application is not limited thereto. In some other embodiments of the present application, steam other than the steam output from the tertiary circuit 103 can also be used as the driving gas source for the drive mechanism 12.

[0064] In this embodiment, the steam compressor 11 is driven by the steam turbine 121, and the steam source of the steam turbine 121 adopts the steam of the pressurized water reactor nuclear power unit, which maximizes the use of the thermal energy of the pressurized water reactor unit, breaks through the existing industrial steam supply parameters of the pressurized water reactor nuclear power unit, fills the gap in the supply of high-temperature and high-pressure steam by the pressurized water reactor nuclear power unit, and solves the high-temperature and high-pressure steam demand of chemical enterprises.

[0065] FIG4 is a structural block diagram of a steam compressor system 10 c according to another specific embodiment of the present invention; FIG5 is a structural block diagram of a steam compressor system 10 d according to another specific embodiment of the present invention.

[0066] As shown in Figures 4 and 5, the steam compressor system 10 also includes a gearbox 124, which is connected between the steam compressor 11 and the drive mechanism 12, and multiple couplings 123 are also connected between the drive mechanism 12 and the gearbox 124 and between the gearbox 124 and the steam compressor 11.

[0067] Specifically, in the steam compressor system 10c shown in FIG4 , the driving mechanism 12 is a steam turbine 121, which is connected to a gearbox 124 via a coupling 123, and the gearbox 124 is connected to the steam compressor 11 via a coupling 123. In the steam compressor system 10d shown in FIG5 , the driving mechanism 12 is an electric motor 122, which is connected to a gearbox 124 via a coupling 123, and the gearbox 124 is connected to the steam compressor 11 via a coupling 123.

[0068] In a specific embodiment, when the speed requirement of the steam compressor 11 meets the preset condition range, a gearbox 124 is set, wherein the preset condition range is set according to the pressure ratio parameter of the steam compressor 11, and the pressure ratio parameter includes the ratio between the steam at the output end and the steam at the input end of the steam compressor 11. The output end of the steam compressor 11 refers to the output end after the steam compressor 11 compresses the output steam of the three-circuit 103, and the input end refers to the end of the steam compressor 11 connected to the three-circuit 103. For example, when the pressure ratio is not high, it is considered that the speed requirement of the steam compressor 11 is small, and there is no need to add the gearbox 124. It can be understood that the preset condition range is set according to the actual pressure ratio parameter, and this application does not impose any restrictions on this.

[0069] In the above embodiments, the steam compressor system 10a, the steam compressor system 10b, the steam compressor system 10c and the steam compressor system 10d are single-cylinder steam compressor systems. When the steam compressor system 10 is a single-cylinder steam compressor system, the number of steam compressors 11 connected to the steam turbine 121 or the electric motor 122 is 1, that is, the driving mechanism 12 only drives one steam compressor 11.

[0070] FIG6 is a structural block diagram of a steam compressor system 10e according to another specific embodiment of the present invention; FIG7 is a structural block diagram of a steam compressor system 10f according to another specific embodiment of the present invention.

[0071] In the embodiments shown in Figures 6 and 7 , the steam compressor system 10 may also be a dual-cylinder steam compressor system. When the steam compressor system 10 is a dual-cylinder steam compressor system, the number of steam compressors 11 connected to the steam turbine 121 or the electric motor 122 is two, and the drive mechanism 12 can drive both steam compressors 11 simultaneously.

[0072] In the steam compressor system 10e shown in Figure 6 , the driving mechanism 12 is a steam turbine 121, which is connected to the two steam compressors 11 via couplings 123. In the steam compressor system 10f shown in Figure 7 , the driving mechanism 12 is an electric motor 122, which is connected to the two steam compressors 11 via couplings 123.

[0073] FIG8 is a structural block diagram of a steam compressor system 10g according to another specific embodiment of the present invention; FIG9 is a structural block diagram of a steam compressor system 10h according to another specific embodiment of the present invention.

[0074] In the steam compressor system 10g shown in Figure 8 , the driving mechanism 12 is a steam turbine 121, which is connected to two gearboxes 124 via couplings 123. The two gearboxes 124 are connected to the steam compressor 11 via couplings 123. In the steam compressor system 10h shown in Figure 9 , the driving mechanism 12 is an electric motor 122, which is connected to two gearboxes 124 via couplings 123. The two gearboxes 124 are connected to the steam compressor 11 via couplings 123.

[0075] FIG10 is a flow chart of a driving method 20 of a steam compressor system according to an embodiment of the present invention.

[0076] As shown in FIG10 , this embodiment provides a driving method 20 of a steam compressor system 10 , which drives the steam compressor system 10 of the above embodiment.

[0077] The driving method 20 includes the following steps.

[0078] Step 21 : providing a steam compressor system 10 , wherein the steam compressor system 10 includes a steam compressor 11 and a driving mechanism 12 connected to the steam compressor 11 .

[0079] In step 22 , the driving mechanism 12 is connected to the tertiary circuit 103 of the pressurized water reactor 100 , and the output steam of the tertiary circuit 103 is delivered to the steam compressor system 10 .

[0080] Step 23: The driving mechanism 12 drives the steam compressor 11 to compress the output steam generated from the tertiary circuit 103. In some embodiments, the driving mechanism 12 can also select the output steam of the tertiary circuit 103 as the compressed gas source when driving the steam compressor 11.

[0081] FIG11 is a system block diagram of a pressurized water reactor steam supply system 30 according to an embodiment of the present invention.

[0082] As shown in FIG11 , the pressurized water reactor steam supply system 30 of this embodiment includes: a pressurized water reactor 100 , the steam compressor system 10 shown in the above embodiment, and a steam user end 301 .

[0083] The pressurized water reactor 100 includes a primary circuit 101 connected to the reactor core, a secondary circuit 102 isolated from the primary circuit and flowing through the steam generator tubes, and a tertiary circuit 103 using demineralized water as its water source. The steam output from tertiary circuit 103 is input to a steam compressor system 10. The steam compressor system 10 is connected to the tertiary circuit 103; the steam user is also connected to the steam compressor system 10. The steam compressor 11 compresses the steam output from the tertiary circuit 103 and ultimately outputs it to the steam user 301, forming the pressurized water reactor steam supply system 30.

[0084] FIG12 is a system block diagram of a pressurized water reactor steam supply system 30 according to another embodiment of the present invention.

[0085] As shown in Figure 12, the third circuit 103 includes a desalted water tank 33, a preheater 35, a deaerator 34, a heater 32, a steam generator 31, a make-up water pump 37 and a booster pump 36, wherein the desalted water tank 33 is used to provide desalted water as the water source of the third circuit 103. The desalted water passes through the preheater 35, the deaerator 34, the heater 32, and the steam generator 31 in sequence and finally forms the output steam of the third circuit 103 to be transported to the steam compressor system 10.

[0086] This application utilizes nuclear power from a pressurized water reactor 100 to generate low- or medium-pressure superheated steam. This is then compressed into medium- or high-pressure superheated steam via a steam compressor 11, driven by either a pneumatic or electric motor. Ultimately, this meets the need for the pressurized water reactor 100 to supply industrial steam to chemical bases. In some preferred embodiments, when the drive mechanism 12 is a steam turbine 121, the steam source for steam turbine 121 utilizes the steam output from the tertiary circuit 103 of the pressurized water reactor 100, maximizing the utilization of nuclear power thermal energy.

[0087] This application utilizes the principle of isentropic enthalpy increase when steam is compressed by the steam compressor 11 to improve the steam parameters at the outlet of the steam compressor 11. Taking the provision of high-pressure superheated steam as an example, to provide industrial steam with higher pressure, temperature, and a larger flow rate, referring to the above description, under this operating condition, the steam compressor system 10 can adopt a dual-cylinder structure, driven by the steam turbine 121, and use the gearbox 124 to increase the speed, so that the pressurized water reactor 100 can achieve the purpose of providing industrial medium-pressure or high-pressure superheated steam. In this way, the pressurized water reactor can effectively provide industrial medium-pressure and high-pressure superheated steam, and the system is simple and economical, maximizing the use of the pressurized water reactor nuclear power thermal energy.

[0088] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A steam compressor system connected to a pressurized water reactor, wherein the pressurized water reactor comprises three circuits for outputting steam, characterized in that: The steam compressor system comprises: A driving mechanism connected to the three-circuit of the pressurized water reactor; a steam compressor connected to the driving mechanism; in, The driving mechanism can drive the steam compressor to compress the output steam of the three circuits.

2. The steam compressor system according to claim 1, characterized in that: The driving mechanism includes a steam turbine or an electric motor.

3. The steam compressor system according to claim 2, characterized in that: The driving mechanism further comprises a coupling, and the steam compressor is connected to the steam turbine or the electric motor via the coupling.

4. The steam compressor system according to claim 2, characterized in that: The steam compressor system includes a single-cylinder steam compressor system or a double-cylinder steam compressor system, wherein: When the steam compressor system is the single-cylinder steam compressor system, the number of the steam compressors connected to the steam turbine or the electric motor is 1; When the steam compressor system is the dual-cylinder steam compressor system, the number of the steam compressors connected to the steam turbine or the electric motor is 2.

5. The steam compressor system according to claim 2, characterized in that: When the driving mechanism is the steam turbine, the driving gas source of the steam turbine is the output steam of the three circuits.

6. The steam compressor system according to claim 1, characterized in that: It also includes a gear box, which is connected between the steam compressor and the driving mechanism.

7. The steam compressor system according to claim 6, characterized in that: When the speed requirement of the steam compressor meets a preset condition range, the gearbox is set, wherein the preset condition range is set according to a pressure ratio parameter of the steam compressor, and the pressure ratio parameter includes a ratio between steam at an output end and steam at an input end of the steam compressor.

8. A method for driving a steam compressor system, for driving the steam compressor system according to claim 1, characterized in that: The steps include: connecting the driving mechanism to the tertiary circuit of the pressurized water reactor; outputting the output steam of the three circuits to the steam compressor; The driving mechanism drives the steam compressor to compress the output steam from the three circuits.

9. A pressurized water reactor steam supply system, characterized in that: include: A pressurized water reactor, the pressurized water reactor comprising three circuits for outputting steam; The steam compressor system according to any one of claims 1 to 7, wherein the steam compressor system is connected to the three circuits; and The steam user end is connected to the steam compressor system.

10. The steam supply system for a pressurized water reactor according to claim 9, characterized in that: The three-circuit system includes a desalted water tank, a preheater, a deaerator, a heater, a steam generator, a make-up water pump and a booster pump, wherein the desalted water tank is used to provide desalted water as a water source for the three-circuit system, and the desalted water passes through the preheater, the deaerator, the heater and the steam generator in sequence to finally form the output steam of the three-circuit system to be transported to the steam compressor system.

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