Thermodynamic system based on wide pressurizing module

Abstract

The invention relates to the technical field of steam turbines, and discloses a thermodynamic system based on a wide pressurization module, the thermodynamic system comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a recovery mechanism and a generator, the boiler, the high-pressure cylinder, the intermediate-pressure cylinder, the low-pressure cylinder and the recovery mechanism are sequentially connected through pipelines; the recovery mechanism is connected with the boiler through a pipeline, and the low-pressure cylinder is connected with the generator; the boiler is further connected with a wide pressurizing module through a pipeline; according to the thermodynamic system in a normal operation mode, the wide-width pressurization module is in a non-operation state, and the boiler conveys steam to the high-pressure cylinder; according to the thermodynamic system in a peak regulation operation mode and in low-load operation, the wide-width pressurization module and the high-pressure cylinder are connected in series for operation, the boiler conveys steam to the wide-width pressurization module, and the wide-width pressurization module conveys steam to the high-pressure cylinder. According to the invention, the low-load operation efficiency is improved, and wide-load efficient operation is realized.

Description

Technical Field

[0001] This invention relates to the field of steam turbine technology, and more specifically, to a thermodynamic system based on a wide-range booster module. Background Technology

[0002] With the strategic needs of the national energy transition, and in order to adapt to the unstable operation of new energy sources such as wind and solar power, it is necessary to improve the backup guarantee capacity of thermal power units. The requirements for the wide-load operation of thermal power units are becoming increasingly higher. However, when conventional thermal power units are running at low loads, the steam pressure and other parameters drop significantly, resulting in low operating efficiency and failing to effectively meet the requirements for high-efficiency operation under wide loads. Summary of the Invention

[0003] The technical objective of this invention is to address the shortcomings of the prior art by providing a thermal system based on a wide-range booster module that is beneficial for improving low-load operating efficiency and achieving high-efficiency operation under wide loads.

[0004] The technical solution adopted in this invention is as follows: A thermal system based on a wide-range booster module, the thermal system comprising a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a recovery mechanism, and a generator, wherein the boiler, high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder, and recovery mechanism are connected sequentially via pipelines, the recovery mechanism is connected to the boiler via a pipeline, and the low-pressure cylinder is connected to the generator; The boiler is also connected to a wide-range booster module via pipes; In the normal operating mode of the thermal system, the wide-range booster module is in a non-operating state, and the boiler supplies steam to the high-pressure cylinder; In the thermal system operating under peak-shaving and low-load conditions, the wide-range booster module and the high-pressure cylinder operate in series. The boiler supplies steam to the wide-range booster module, and the wide-range booster module supplies steam to the high-pressure cylinder.

[0005] The above-mentioned technical measures, by setting up a wide-range pressure boosting module, allow the boiler to supply steam to the high-pressure cylinder during normal operation. During peak-shaving operation and low-load operation, the wide-range pressure boosting module operates in series with the high-pressure cylinder. The boiler supplies steam to the wide-range pressure boosting module, which then supplies steam to the high-pressure cylinder. By adjusting the steam pressure through the wide-range pressure boosting module, the steam pressure entering the high-pressure cylinder is increased, thereby improving the efficiency of low-load operation and achieving high-efficiency operation under wide loads.

[0006] Furthermore, a first regulating valve is provided on the pipeline connecting the boiler to the wide-range booster module, and a bypass valve is provided on the pipeline connecting the boiler to the high-pressure cylinder; In the normal operating mode of the thermal system, the first regulating valve is in the closed state and the bypass valve is in the open state; In the thermal system operating under peak-shaving mode and at low load, the first regulating valve is in the open state and the bypass valve is in the closed state.

[0007] The above-mentioned technical measures facilitate the switching of different operating modes by controlling the opening and closing of the first regulating valve and the bypass valve.

[0008] Furthermore, the recovery mechanism includes a hydrophobic expansion tank and a condenser connected together; The wide-range booster module is connected to the condensate expansion container via a condensate drain pipe, and the condensate drain pipe is equipped with a condensate valve.

[0009] The above-mentioned technical measures use a condensate drain valve and a condensate drain pipe to discharge the condensate generated by the wide-range booster module after heating into the condensate expansion tank, and then into the condenser for recovery.

[0010] Furthermore, the recovery mechanism also includes a deaerator, which is connected to the intermediate pressure cylinder via a pipeline, and the intermediate pressure cylinder provides the deaerator with a deoxygenated steam source; The deaerator has a branch pipe on the pipe connecting it to the intermediate pressure cylinder. The branch pipe is connected to the drain pipe, and the connection point between the branch pipe and the drain pipe is located upstream of the drain valve.

[0011] The above-mentioned technical measures, by setting up branch pipes, allow steam to enter the wide-range booster module sequentially through the branch pipes and drain pipes during normal operation, preheating the wide-range booster module. This helps reduce the thermal shock caused by high-temperature steam to the wide-range booster module during operation and ensures operational stability.

[0012] Furthermore, the branch pipe is equipped with a second regulating valve and a first check valve; In the normal operating mode of the thermal system, the second regulating valve and the first check valve are in the open state; in the peak-shaving operating mode and the thermal system operating at low load, the second regulating valve and the first check valve are in the closed state.

[0013] The above-mentioned technical measures involve installing a second regulating valve and a first check valve on the branch pipeline. In normal operation mode, the second regulating valve and the first check valve are opened, allowing steam to be discharged into the drain pipe through the branch pipeline, and then into the wide-range booster module through the drain pipe to preheat the wide-range booster module and prevent steam backflow. At the same time, in peak-shaving operation mode and low-load operation, the second regulating valve and the first check valve are closed, which helps to prevent energy waste.

[0014] Furthermore, the steam outlet of the wide-range booster module is connected to the steam inlet of the high-pressure cylinder, the middle part of the high-pressure cylinder, the middle part of the intermediate-pressure cylinder, the condenser, and the deaerator via pipelines. The pipeline connecting the steam outlet of the wide-range booster module to the steam inlet of the high-pressure cylinder is equipped with a second one-way valve and a third regulating valve in sequence.

[0015] The above-mentioned technical measures, by diverting the exhaust steam of the wide-range booster module, help to avoid the exhaust steam from the wide-range booster module to blow air; and reduce the cooling rate of the steam entering the high-pressure cylinder inlet, thereby reducing the cooling rate of components such as the high-pressure cylinder and ensuring operational stability and safety.

[0016] The above-mentioned technical measures prevent steam backflow by setting a second one-way valve and facilitate the adjustment of steam flow on the pipeline connecting the steam outlet of the wide-range booster module and the steam inlet of the high-pressure cylinder by setting a third regulating valve.

[0017] Furthermore, a fourth regulating valve is provided on the pipe connecting the steam outlet of the wide-range booster module to the middle of the high-pressure cylinder; The above-mentioned technical measures, by setting a fourth regulating valve, facilitate the adjustment of the steam flow rate on the pipeline connecting the steam outlet of the wide-range booster module and the middle of the high-pressure cylinder.

[0018] Furthermore, a fifth regulating valve is provided on the pipe connecting the steam outlet of the wide-range booster module to the middle of the intermediate-pressure cylinder.

[0019] The above-mentioned technical measures, by setting a fifth regulating valve, facilitate the adjustment of the steam flow rate on the pipeline connecting the steam outlet of the wide-range booster module and the middle of the intermediate-pressure cylinder.

[0020] Furthermore, a ventilation valve and a water spray desuperheater are sequentially installed on the pipe connecting the steam outlet of the wide-range booster module to the condenser.

[0021] The above-mentioned technical measures can reduce the exhaust pressure and prevent the wide-range booster module from blowing steam by installing a ventilation valve; and can reduce the steam temperature by installing a water spray desuperheater.

[0022] Furthermore, a sixth regulating valve is provided on the pipeline connecting the steam outlet of the wide-range booster module to the deaerator.

[0023] The above-mentioned technical measures, by setting a sixth regulating valve, facilitate the adjustment of the steam flow rate on the pipeline connecting the steam outlet of the wide-range booster module and the deaerator.

[0024] One or more technical solutions provided by this invention have at least the following technical effects or advantages: This invention, by setting up a wide-range pressure boosting module, allows the boiler to supply steam to the high-pressure cylinder during normal operation. During peak-shaving operation and low-load operation, the wide-range pressure boosting module operates in series with the high-pressure cylinder. The boiler supplies steam to the wide-range pressure boosting module, which then supplies steam to the high-pressure cylinder. By adjusting the steam pressure through the wide-range pressure boosting module, the steam pressure entering the high-pressure cylinder is increased, thereby improving the efficiency of low-load operation and achieving high-efficiency operation under wide loads. Attached Figure Description

[0025] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a measurement point layout diagram of the present invention; Among them, 1-boiler; 2-high pressure cylinder; 3-medium pressure cylinder; 4-low pressure cylinder; 5-generator; 6-wide pressure boosting module; 7-first regulating valve; 8-bypass valve; 9-deaerator; 10-second regulating valve; 11-first check valve; 12-condenser; 13-second check valve; 14-third regulating valve; 15-fourth regulating valve; 16-fifth regulating valve; 17-ventilation valve; 18-spray desuperheater; 19-sixth regulating valve; 20-steam trap; 21-reheater; T1 - Steam temperature; T2 - High-pressure steam inlet temperature; T3 - Wide-range booster module exhaust temperature; T4 - Deaerator steam inlet temperature; T5 - Wide-range booster module inner wall temperature; P1 - Steam pressure; P2 - High-pressure steam inlet pressure; P3 - Wide-range booster module exhaust pressure; P4 - Deaerator pressure; P5 - Condenser pressure; P6 - Medium-pressure flow inlet pressure; P7 - High-pressure flow inlet pressure; P8 - Medium-pressure steam inlet pressure. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0028] Reference Figures 1-2This embodiment provides a thermal system based on a wide-range booster module. The thermal system includes a boiler 1, a high-pressure cylinder 2, a medium-pressure cylinder 3, a low-pressure cylinder 4, a recovery mechanism, and a generator 5. The boiler 1, high-pressure cylinder 2, medium-pressure cylinder 3, low-pressure cylinder 4, and recovery mechanism are connected in sequence through pipelines. The recovery mechanism is connected to the boiler 1 through a pipeline, and the low-pressure cylinder 4 is connected to the generator 5. A reheater 21 is provided between the high-pressure cylinder 2 and the medium-pressure cylinder 3. The steam discharged from the high-pressure cylinder 2 is reheated by the reheater 21 and then sent to the medium-pressure cylinder 3. Boiler 1 is also connected to a wide-range booster module 6 via a pipeline; the wide-range booster module 6 can be a booster cylinder or other booster device.

[0029] In the normal operating mode of the thermal system, the wide-range booster module 6 is in a non-operating state, and the boiler 1 supplies steam to the high-pressure cylinder 2; In the thermal system operating under peak-shaving mode and low load, the wide-range booster module 6 and the high-pressure cylinder 2 operate in series. The boiler 1 supplies steam to the wide-range booster module 6, and the wide-range booster module 6 supplies steam to the high-pressure cylinder 2.

[0030] Among them, the wide-range booster module 6 is rigidly connected to the high-voltage rotor.

[0031] A first regulating valve 7 is provided on the pipeline connecting boiler 1 to the wide-range booster module 6, and a bypass valve 8 is provided on the pipeline connecting boiler 1 to the high-pressure cylinder 2. In the normal operating mode of the thermal system, the first regulating valve 7 is closed and the bypass valve 8 is open. In a thermal system operating under peak-shaving mode and at low load, the first regulating valve 7 is in the open state and the bypass valve 8 is in the closed state.

[0032] The recycling mechanism also includes a condensate expansion tank and a condenser 12 connected to each other. The wide-range pressurization module 6 is connected to the condensate expansion tank through a condensate pipe, and a condensate valve 20 is provided on the condensate pipe.

[0033] The recovery mechanism also includes a deaerator 9, which is connected to an intermediate pressure cylinder 3 via a pipeline. The intermediate pressure cylinder 3 provides a deaerator steam source for the deaerator 9. The pipe connecting the deaerator 9 and the intermediate pressure cylinder 3 has a branch pipe, which is connected to the drain pipe, and the connection point between the branch pipe and the drain pipe is located upstream of the drain valve 20.

[0034] The branch pipeline is equipped with a second regulating valve 10 and a first check valve 11; in the normal operation mode of the thermal system, the second regulating valve 10 and the first check valve 11 are in the open state; in the peak-shaving operation mode and the thermal system operating at low load, the second regulating valve 10 and the first check valve 11 are in the closed state.

[0035] The steam outlet of the wide-range booster module 6 is connected to the steam inlet of the high-pressure cylinder 2, the middle part of the high-pressure cylinder 2, the middle part of the intermediate-pressure cylinder 3, the condenser 12, and the deaerator 9 through pipelines.

[0036] Among them, the middle part of the high-pressure cylinder 2 is the middle part of the high-pressure flow, and the middle part of the medium-pressure cylinder 3 is the middle part of the medium-pressure flow.

[0037] The pipe connecting the steam outlet of the wide-range booster module 6 to the steam inlet of the high-pressure cylinder 2 is equipped with a second one-way valve 13 and a third regulating valve 14 in sequence.

[0038] A fourth regulating valve 15 is installed on the pipeline connecting the steam outlet of the wide-range booster module 6 to the middle of the high-pressure cylinder 2.

[0039] A fifth regulating valve 16 is installed on the pipeline connecting the steam outlet of the wide-range booster module 6 to the middle of the intermediate-pressure cylinder 3.

[0040] A ventilation valve 17 and a water spray desuperheater 18 are sequentially installed on the pipe connecting the steam outlet of the wide-range booster module 6 to the condenser 12.

[0041] A sixth regulating valve 19 is installed on the pipeline connecting the steam outlet of the wide-range booster module 6 to the deaerator 9.

[0042] The recycling system also includes a condensate pump, a shaft seal heater, and a feedwater pump.

[0043] In the normal operating mode of the thermal system (taking 50%Pe to 100%Pe as an example), the steam generated by boiler 1 passes through bypass valve 8 and the third regulating valve 14 sequentially into the high-pressure cylinder 2, intermediate-pressure cylinder 3, and low-pressure cylinder 4 to perform work. After performing work, the steam is discharged into condenser 12. The unit operates under sliding pressure between 50%Pe and 100%Pe, with the third regulating valve 14 fully open. The unit load is adjusted by boiler 1. The operating process is the same as that of a conventional supercritical unit. Taking a 24.2MPa / 566℃ / 566℃ supercritical unit as an example, under 50%Pe conditions, combined with... Figure 2 The parameters of each section of the steam turbine detected by sensors and other monitoring devices are shown in Table 1: In a thermal system operating under peak-shaving and low-load conditions (taking <50%Pe as an example), the steam generated by boiler 1 is delivered to the wide-range booster module 6. The exhaust steam from the wide-range booster module 6 passes sequentially through the second one-way valve 13 and the third regulating valve 14 into the high-pressure cylinder 2, the medium-pressure cylinder 3, and the low-pressure cylinder 4 to perform work. At this time, combined with... Figure 2 The parameters of each section of the steam turbine detected by sensors and other monitoring devices are shown in Table 2: Comparing Tables 1 and 2, T2 and T5 show significant changes. To ensure the stability of the unit operation after the wide-range booster module 6 is put into operation and to reduce the thermal shock of high-temperature steam to the wide-range booster module 6, branch pipes and the second regulating valve 10 and the first check valve 11 installed on the branch pipes are used. Under normal operating mode, part of the steam in the deaerator steam source enters the wide-range booster module 6 through the branch pipes and the drain pipes to preheat the wide-range booster module 6, preheating the inner wall temperature T5 of the wide-range booster module to above 300℃. In order to reduce the cold shock of the high-pressure steam inlet temperature T2 to the third regulating valve 14 and the high-pressure cylinder 2, the exhaust steam of the wide-range booster module 6 is not only normally discharged into the steam inlet of the high-pressure cylinder 2, but also discharged into the middle of the high-pressure cylinder 2, the middle of the intermediate-pressure cylinder 3, the condenser 12 and the deaerator 9 respectively, so as to reduce the cooling rate.

[0044] In normal operating mode, the first regulating valve 7, the second check valve 13, the sixth regulating valve 19, the fourth regulating valve 15, the fifth regulating valve 16, and the drain valve 20 are closed, while the second regulating valve 10, the first check valve 11, and the vent valve 17 are opened. The steam generated by boiler 1 enters the high-pressure cylinder 2 through the bypass valve 8 and the third regulating valve 14 in sequence. The steam discharged from the high-pressure cylinder 2 is reheated by the reheater 21 and then discharged into the intermediate-pressure cylinder 3. The steam discharged from the intermediate-pressure cylinder 3 is discharged into the low-pressure cylinder 4, thereby driving the generator 5 to generate electricity. The steam discharged from the low-pressure cylinder 4 enters the condenser 12, where it is condensed into condensate. The condensate is then pumped to the shaft seal heater by the condensate pump. The shaft seal heater uses the steam leaking from the turbine to heat the condensate and then pumps the heated condensate to the deaerator 9 for deoxygenation, forming feedwater. The feedwater is pumped back to boiler 1 by the feedwater pump to complete the recovery.

[0045] During this process, the second regulating valve 10 and the first one-way valve 11 are used to discharge part of the steam from the deoxygenated heat source into the wide-range booster module 6 to preheat the wide-range booster module, so that the inner wall temperature T5 of the wide-range booster module slowly rises. The rate of temperature rise is determined according to the manufacturer's operating instructions. When the inner wall temperature T5 of the wide-range booster module is greater than 280°C, the second regulating valve 10 is locked.

[0046] When in peak-shaving operation mode, when the unit load is <55%Pe, the second regulating valve 10 is closed, and the preheating of the wide-range booster module 6 ends. When the unit load is <50%, the first regulating valve 7 is slowly opened at a rate of approximately 1% / min, while the bypass valve 8 is gradually closed. The steam generated by boiler 1 enters the wide-range booster module 6 through the first regulating valve 7. The wide-range booster module 6 controls the steam pressure P1 to increase slowly at a rate of approximately 0.1MPa / min. As the opening of the first regulating valve 7 increases, the steam intake increases, and the exhaust pressure P3 of the wide-range booster module gradually increases. When the exhaust pressure P3 of the wide-range booster module is greater than the deaerator pressure P4, the ventilation valve 17 is closed, and the sixth regulating valve 19 is slowly opened, allowing the exhaust steam from the wide-range booster module 6 to enter the deaerator 9. The deaerator pressure P4 is maintained within a reasonable operating range by adjusting the sixth regulating valve 19. When the exhaust pressure P3 of the wide-range booster module is greater than the medium-pressure inlet pressure P6, the fifth regulating valve 16 is slowly opened. The process involves: 1) allowing a portion of the exhaust steam from the wide-range booster module 6 to enter the intermediate-pressure flow path; 2) maintaining the intermediate-pressure flow inlet pressure P6 within a reasonable operating range by adjusting the fifth regulating valve 16; 3) closing the sixth regulating valve 19 to allow all the exhaust steam from the wide-range booster module 6 to enter the intermediate-pressure flow path; 4) slowly opening the fourth regulating valve 15 to allow a portion of the exhaust steam from the wide-range booster module 6 to enter the high-pressure flow path, maintaining the high-pressure flow inlet pressure P7 within a reasonable operating range by adjusting the fourth regulating valve 15; 5) closing the fifth regulating valve 16 to allow all the exhaust steam from the wide-range booster module 6 to enter the high-pressure flow path; 6) closing the fourth regulating valve 15 to allow all the exhaust steam from the wide-range booster module 6 to enter the high-pressure cylinder 2 through the third regulating valve 14; 7) completing the commissioning of the wide-range booster module 6 when the unit load reaches approximately 30%Pe, entering a deep peak-shaving operation mode.

[0047] When the unit exits the deep peak shaving operation mode, the unit load gradually increases. When the unit load exceeds 30% Pe, the opening of the first regulating valve 7 slowly closes at a rate of approximately 1% / min, while the bypass valve 8 gradually opens. The bypass valve 8 controls the steam pressure P1 to slowly decrease at a rate of approximately 0.1 MPa / min. As the opening of the first regulating valve 7 decreases, the exhaust pressure P3 of the wide-range booster module gradually decreases. When the exhaust pressure P3 of the wide-range booster module approaches the high-pressure inlet pressure P2 (e.g., P3 - P2 > 0.2 MPa), the fourth regulating valve 15 opens, allowing a portion of the exhaust steam from the wide-range booster module 6 to enter the high-pressure flow path. When the exhaust pressure P3 of the wide-range booster module is less than the high-pressure inlet pressure P2, the second check valve 13 closes, allowing all the exhaust steam from the wide-range booster module 6 to enter the high-pressure flow path. When the exhaust pressure P3 of the wide-range booster module approaches the high-pressure flow inlet pressure P7 (e.g., P3 - P7 > 0.2 MPa), the fifth regulating valve 1 opens. 6. Allow a portion of the exhaust steam from the wide-range booster module 6 to enter the medium-pressure flow path; when the exhaust steam pressure P3 of the wide-range booster module equals the high-pressure flow inlet pressure P7, close the fourth regulating valve 15, allowing all the exhaust steam from the wide-range booster module 6 to enter the medium-pressure flow path; when the exhaust steam pressure P3 of the wide-range booster module approaches the medium-pressure flow inlet pressure P6 (e.g., P3 - P6 > 0.1 MPa), open the sixth regulating valve 19, allowing a portion of the exhaust steam from the wide-range booster module 6 to enter the deaerator 9, when the wide-range booster module 6... When the exhaust pressure P3 of the wide-range booster module is equal to the inlet pressure P6 of the medium-pressure flow path, the fifth regulating valve 16 is closed, allowing all the exhaust steam from the wide-range booster module 6 to enter the deaerator 9; when the exhaust pressure P3 of the wide-range booster module is close to the deaerator pressure P4 (for example, P3-P4>0.1MPa), the ventilation valve 17 is opened; when the exhaust pressure P3 of the wide-range booster module is equal to the deaerator pressure P4, the sixth regulating valve 19 is closed, allowing all the exhaust steam from the wide-range booster module 6 to enter the condenser 12.

[0048] After the wide-range booster module 6 is taken out of operation, the inner wall temperature T5 of the wide-range booster module will gradually decrease. When the inner wall temperature T5 of the wide-range booster module is less than 250°C, the second regulating valve 10, the first one-way valve 11 and the ventilation valve 17 are opened to preheat the wide-range booster module 6, so that the inner wall temperature T5 of the wide-range booster module slowly rises. When the inner wall temperature T5 of the wide-range booster module is greater than 280°C, the second regulating valve 10 is locked.

[0049] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0050] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A thermal system based on a wide-range booster module, the thermal system comprising a boiler (1), a high-pressure cylinder (2), a medium-pressure cylinder (3), a low-pressure cylinder (4), a recovery mechanism, and a generator (5), wherein the boiler (1), the high-pressure cylinder (2), the medium-pressure cylinder (3), the low-pressure cylinder (4), and the recovery mechanism are connected in sequence by pipelines, the recovery mechanism is connected to the boiler (1) by a pipeline, and the low-pressure cylinder (4) is connected to the generator (5); Its features are: The boiler (1) is also connected to a wide-range booster module (6) via a pipeline. In the normal operating mode of the thermal system, the wide-range booster module (6) is in a non-operating state, and the boiler (1) supplies steam to the high-pressure cylinder (2); In the thermal system operating under peak shaving mode and low load, the wide-range booster module (6) and the high-pressure cylinder (2) are connected in series. The boiler (1) supplies steam to the wide-range booster module (6), and the wide-range booster module (6) supplies steam to the high-pressure cylinder (2).

2. The thermodynamic system based on a wide-range booster module according to claim 1, characterized in that: A first regulating valve (7) is provided on the pipe connecting the boiler (1) to the wide-range booster module (6), and a bypass valve (8) is provided on the pipe connecting the boiler (1) to the high-pressure cylinder (2). In the normal operating mode of the thermal system, the first regulating valve (7) is in the closed state and the bypass valve (8) is in the open state; In the thermal system operating under peak shaving mode and low load, the first regulating valve (7) is in the open state and the bypass valve (8) is in the closed state.

3. The thermodynamic system based on a wide-range booster module according to claim 1, characterized in that: The recovery mechanism includes a hydrophobic expansion tank and a condenser (12) connected together. The wide-range booster module (6) is connected to the condensate expansion container via a condensate drain pipe, and a condensate drain valve (20) is provided on the condensate drain pipe.

4. The thermodynamic system based on the wide-range booster module according to claim 3, characterized in that: The recovery mechanism also includes a deaerator (9), which is connected to the intermediate pressure cylinder (3) via a pipeline. The intermediate pressure cylinder (3) provides the deaerator (9) with a deoxygenated steam source. The deaerator (9) has a branch pipe on the pipe connected to the medium-pressure cylinder (3). The branch pipe is connected to the drain pipe, and the connection position of the branch pipe and the drain pipe is located upstream of the drain valve (20).

5. The thermodynamic system based on the wide-range booster module according to claim 4, characterized in that: The branch pipe is equipped with a second regulating valve (10) and a first check valve (11). In the normal operating mode, the second regulating valve (10) and the first check valve (11) of the thermal system are in the open state; in the peak shaving operation mode and the thermal system is operating at low load, the second regulating valve (10) and the first check valve (11) are in the closed state.

6. The thermodynamic system based on the wide-range booster module according to claim 4, characterized in that: The steam outlet of the wide-range booster module (6) is connected to the steam inlet of the high-pressure cylinder (2), the middle part of the high-pressure cylinder (2), the middle part of the medium-pressure cylinder (3), the condenser (12), and the deaerator (9) through pipelines. The pipe connecting the steam outlet of the wide-range booster module (6) to the steam inlet of the high-pressure cylinder (2) is provided with a second one-way valve (13) and a third regulating valve (14) in sequence.

7. The thermodynamic system based on a wide-range booster module according to claim 6, characterized in that: The steam outlet of the wide-range booster module (6) is connected to the pipe in the middle of the high-pressure cylinder (2) by a fourth regulating valve (15).

8. The thermodynamic system based on the wide-range booster module according to claim 6, characterized in that: The steam outlet of the wide-range booster module (6) is connected to the pipeline in the middle of the intermediate pressure cylinder (3) by a fifth regulating valve (16).

9. The thermodynamic system based on a wide-range booster module according to claim 6, characterized in that: The steam outlet of the wide-range booster module (6) is connected to the condenser (12) via a pipe with a ventilation valve (17) and a water spray desuperheater (18) in sequence.

10. The thermodynamic system based on a wide-range booster module according to claim 6, characterized in that: The steam outlet of the wide-range booster module (6) is connected to the deaerator (9) via a sixth regulating valve (19).

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