Industrial steam supply adjusting device under straight condensing working condition of steam turbine

Abstract

The industrial steam supply adjusting device comprises a steam turbine body, a fused salt heat storage system, a peak regulation heating system, a heat collection system, an industrial steam supply system and a cooperative control module. The steam turbine body comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are connected in sequence, an outlet of the low-pressure cylinder is connected with a condenser, a hot resteam pipe is arranged between the high-pressure cylinder and the intermediate-pressure cylinder, and the intermediate-pressure cylinder and the low-pressure cylinder are connected through a communicating pipe; the heat collecting system comprises a condenser, a low-pressure heater and a deaerator which are sequentially connected. The fused salt heat storage system has the beneficial effects that peak load shifting of steam is achieved through the fused salt heat storage system, stored heat energy is released at the peak of industrial steam to supplement the steam, excess energy is stored at the valley, and the contradiction between supply and demand is solved; dynamic balance of power generation and industrial steam supply under the pure condensing working condition is achieved, the remarkable influence of steam extraction on the power generation efficiency is avoided, and the overall operation economical efficiency of a unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to thermal power generation, in particular to an industrial steam supply adjustment device under the pure condensing condition of a steam turbine. BACKGROUND

[0002] The steam turbine is one of the core equipment for power generation, and its pure condensing condition refers to that the steam turbine is mainly used to drive the generator to generate power, and the steam is fully condensed into the condenser after doing work in the low-pressure cylinder, forming an operation mode of "mainly generating power without additional steam supply". With the increasing demand for steam in industrial production, it is an important demand to realize stable and efficient industrial steam supply under the pure condensing condition of the steam turbine.

[0003] In the prior art, the industrial steam supply under the pure condensing condition mainly has the following problems: 1. Steam supply and demand contradiction: the industrial steam demand has volatility (such as day and night, seasonal difference), and the steam flow of the steam turbine under the pure condensing condition mainly matches the power generation demand, and directly extracting steam for industrial steam supply is easy to cause the decrease of power generation efficiency or the shortage of steam supply; 2. Low energy utilization efficiency: when a separate boiler is set for industrial steam supply, there is a problem of equipment redundancy and high energy consumption; if the steam is extracted from the low-pressure cylinder of the steam turbine, the original thermal cycle of the unit will be damaged, and the overall energy utilization rate will be reduced; 3. Insufficient peak shaving capacity: when the industrial steam demand is high, it is difficult to quickly supplement the steam; when the industrial steam demand is low, the excess steam cannot be effectively stored, resulting in energy waste; 4. Poor coordination: the power generation and industrial steam supply lack a dynamic balance mechanism, and it is difficult to adapt to the dual fluctuations of the power grid load and the industrial steam demand.

[0004] The molten salt heat storage technology has the advantages of high heat storage density, wide temperature range (200-600℃), long heat storage period, etc., and has been applied in the field of solar thermal power generation, etc., but there is no mature scheme to combine it with the pure condensing system of the steam turbine to realize the dynamic adjustment of the industrial steam supply. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide an industrial steam supply adjustment device under the pure condensing condition of a steam turbine.

[0006] The purpose of the present application is achieved by the following technical scheme: an industrial steam supply adjustment device under the pure condensing condition of a steam turbine, comprising a steam turbine body, a molten salt heat storage system, a peak shaving heating system, a heat collection system, an industrial steam supply system and a collaborative control module; The steam turbine body comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder connected in sequence, the outlet of the low-pressure cylinder is connected with a condenser, a heat re-steam pipe is arranged between the high-pressure cylinder and the medium-pressure cylinder, and the medium-pressure cylinder and the low-pressure cylinder are connected through a communication pipe; The heat collection system comprises a condenser, a low-pressure heater and a deaerator connected in sequence, The molten salt heat storage system comprises a low-temperature molten salt storage tank, a high-temperature molten salt storage tank, a steam molten salt heat exchanger, a molten salt water vapor heat exchanger, a low-temperature circulating pump and a high-temperature circulating pump, the steam molten salt heat exchanger is connected with a medium-pressure cylinder exhaust pipeline, the molten salt water vapor heat exchanger is connected with an outlet of a deaerator, the low-temperature molten salt storage tank is connected with an inlet of the steam molten salt heat exchanger through the low-temperature circulating pump, an outlet of the steam molten salt heat exchanger is connected with the high-temperature molten salt storage tank, the high-temperature molten salt storage tank is connected with an inlet of the molten salt water vapor heat exchanger through the high-temperature circulating pump, an outlet of the molten salt water vapor heat exchanger is connected with the low-temperature molten salt storage tank, and the outlet of the molten salt water vapor heat exchanger is also connected with a steam heat exchanger, and an outlet of the steam heat exchanger is connected with an industrial steam system. The peak shaving heating system comprises a peak shaving heater and first and second high-pressure heaters, a water side inlet of the peak shaving heater is connected with the first and second high-pressure heaters in sequence, and a water side outlet of the peak shaving heater is connected with a boiler feed water pipeline; the high-pressure cylinder is communicated with the first high-pressure heater through a pipeline, and the medium-pressure cylinder is communicated with the second high-pressure heater through a pipeline. The cooperative control module is electrically connected with the molten salt heat storage system, the peak shaving heating system and the industrial steam supply system, and is used for adjusting operating states of the devices according to operating parameters of the steam turbine and industrial steam supply demand.

[0007] Optionally, a first valve is arranged on a pipeline connecting the water side outlet of the peak shaving heater with the boiler.

[0008] Optionally, the peak shaving heater is communicated with the medium-pressure cylinder through a pipeline, and a second valve is arranged on the pipeline.

[0009] Optionally, a third valve is arranged on a pipeline communicating the medium-pressure cylinder with the second high-pressure heater.

[0010] Optionally, the cooperative control module comprises a multi-parameter closed-loop controller and a safety interlocking submodule, the multi-parameter closed-loop controller collects pressure, temperature and flow parameters of the industrial steam system and an SCR denitration inlet flue gas temperature in real time, adjusts frequencies of the low-temperature circulating pump and the high-temperature circulating pump and a heat re-vaporization introduction amount of the peak shaving heater through a fuzzy PID algorithm, and the safety interlocking submodule communicates with a steam turbine DEH system, and when a low-pressure cylinder steam admission amount is lower than 40% of a design value, triggers a low-pressure cylinder bypass steam supplement and limits a maximum steam consumption of the industrial steam system.

[0011] Optionally, the peak shaving heater adopts a variable-area U-shaped tube bundle structure, a nanometer ceramic anti-fouling coating with a thickness of 0.1-0.3mm is arranged on a surface of the tube bundle, a magnetostrictive liquid level meter and a steam soot blower are arranged in the peak shaving heater, and the cooperative control module controls operation of the steam soot blower according to a drain liquid level detected by the magnetostrictive liquid level meter.

[0012] Optionally, the heat collection system further comprises a first pump body, and the first pump body is located between a condenser and the pressure-resisting heater.

[0013] Optionally, a second pump body is arranged on the pipeline connecting the deaerator with the boiler, and a third pump body is arranged on the pipeline connecting the deaerator with the molten salt heat storage system.

[0014] Optionally, a low-temperature circulating pump is arranged between the low-temperature molten salt storage tank and the steam-molten salt heat exchanger, and a high-temperature circulating pump is arranged between the high-temperature molten salt storage tank and the molten salt-steam heat exchanger.

[0015] The application has the following advantages: 1. The molten salt heat storage system is used to realize the peak shaving of steam, and the stored heat energy is released to supplement steam during the peak of industrial steam, and the excess energy is stored during the valley, so that the contradiction between supply and demand is solved; 2. The dynamic balance between power generation and industrial steam supply under the pure condensing condition is realized, the significant influence of steam extraction on power generation efficiency is avoided, and the overall operation economy of the unit is improved; 3. The exhaust heat of the middle pressure cylinder of the steam turbine is used to heat the molten salt, and the energy that would otherwise be wasted is recovered; the molten salt is used to heat the feed water or generate steam when it releases heat, thereby reducing the energy consumption of the boiler; 4. The peak shaving heater can quickly respond to the change of steam parameters, the molten salt system can realize long-period energy storage and release, and is suitable for different scales of industrial steam demand. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the application is shown in the figure In the figure, 1 is a boiler, 2 is a high-pressure cylinder of a steam turbine, 3 is a middle-pressure cylinder of a steam turbine, 4 is a low-pressure cylinder of a steam turbine, 5 is a peak shaving heater, 6 is a first high-pressure heater, 7 is a second high-pressure heater, 9 is a condenser, 10 is a first pump body, 11 is a low-pressure heater, 12 is a deaerator, 13 is a second pump body, 14 is a third pump body, 15 is a molten salt-steam heat exchanger, 16 is a steam heat exchanger, 17 is an industrial steam system, 18 is a low-temperature molten salt storage tank, 19 is a low-temperature circulating pump, 20 is a steam-molten salt heat exchanger, 21 is a high-temperature circulating pump, 22 is a high-temperature molten salt storage tank, 23 is a first valve, 24 is a second valve, and 25 is a third valve. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. The components of the embodiments of the application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents selected embodiments of the application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the application without creative labor fall within the scope of protection of the application.

[0019] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0020] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0021] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0022] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0023] As shown in Figure 1 , an industrial steam supply adjusting device under the pure condensation condition of a steam turbine, comprising a steam turbine body, a molten salt heat storage system, a peak shaving heating system, a heat collection system, an industrial steam supply system and a collaborative control module; In this embodiment, as shown in Figure 1 , the steam turbine body comprises a boiler 1, a high-pressure cylinder 2, a medium-pressure cylinder 3 and a low-pressure cylinder 4 connected in sequence, the outlet of the low-pressure cylinder 4 is connected to a condenser 9, a heat re-steam pipe is arranged between the high-pressure cylinder 2 and the medium-pressure cylinder 3, and the medium-pressure cylinder 3 and the low-pressure cylinder 4 are connected through a communication pipe.

[0024] In the embodiment, as shown in Figure 1 The boiler 1 is used to generate high-temperature and high-pressure steam to provide initial power for the whole system, and the input end of the high-pressure cylinder 2 of the steam turbine is communicated with the boiler 1 to receive the steam generated by the boiler 1 and perform first work; the input end of the intermediate-pressure cylinder 3 of the steam turbine is communicated with the output end of the high-pressure cylinder 2 of the steam turbine to receive the exhaust gas of the high-pressure cylinder 2 and perform second work; the input end of the low-pressure cylinder 4 of the steam turbine is communicated with the output end of the intermediate-pressure cylinder 3 of the steam turbine to receive the exhaust gas of the intermediate-pressure cylinder 3 and perform third work; and the input end of the condenser 9 is communicated with the output end of the low-pressure cylinder 4 of the steam turbine to condense the exhaust steam of the low-pressure cylinder 4 and form condensed water.

[0025] In the embodiment, as shown in Figure 1 The heat collection system includes the condenser 9, the low-pressure heater 11 and the deaerator 12 connected in sequence, and the heat collection system can collect the heat in the low-pressure cylinder 4 and deliver the heat to the molten salt heat storage system for heat storage.

[0026] In the embodiment, as shown in Figure 1 The molten salt heat storage system includes a low-temperature molten salt storage tank 18, a high-temperature molten salt storage tank 22, a steam-molten salt heat exchanger 20, a molten salt-feedwater heat exchanger 15, a low-temperature circulating pump 19 and a high-temperature circulating pump 21. The steam-molten salt heat exchanger 20 is connected with the exhaust pipe of the intermediate-pressure cylinder 3, the molten salt-feedwater heat exchanger 15 is connected with the outlet of the deaerator 12, the low-temperature molten salt storage tank 18 is connected with the inlet of the steam-molten salt heat exchanger 20 through the low-temperature circulating pump 19, the outlet of the steam-molten salt heat exchanger 20 is connected with the high-temperature molten salt storage tank 22, the high-temperature molten salt storage tank 22 is connected with the inlet of the molten salt-feedwater heat exchanger 15 through the high-temperature circulating pump 21, the outlet of the molten salt-feedwater heat exchanger 15 is connected back to the low-temperature molten salt storage tank 18, and the outlet of the molten salt-feedwater heat exchanger 15 is also connected with a steam heat exchanger 16, and the outlet of the steam heat exchanger 16 is connected with an industrial steam system 17. The steam heated by the heat storage system can extract part of the flue gas in the boiler 1 to be heated by the heater 1 to increase the temperature, so as to meet the temperature parameter requirements of the power plant for external steam supply. When the steam is not needed, it can also be returned to the unit for power generation, further improves the steam temperature generated by the heat storage medium, greatly reduces the steam extraction amount from the unit at high load, meets the steam supply, and realizes the improvement of the unit load.

[0027] In the embodiment, as shown in Figure 1As shown, the peak shaving heating system comprises a peak shaving heater 5 and a first high-pressure heater 6 and a second high-pressure heater 7, the water side inlet of the peak shaving heater 5 is connected with the first high-pressure heater 6 and the second high-pressure heater 7 in sequence, and the water side outlet of the peak shaving heater 5 is connected with the boiler 1 feedwater pipeline; the high-pressure cylinder 2 is communicated with the first high-pressure heater 6 through a pipeline, and the intermediate-pressure cylinder 3 is communicated with the second high-pressure heater 7 through a pipeline; in this embodiment, a first valve 23 is installed on the pipeline connecting the water side outlet of the peak shaving heater 5 with the boiler 1, the peak shaving heater 5 is communicated with the intermediate-pressure cylinder 3 through a pipeline, and a second valve 24 is installed on the pipeline, and a third valve 25 is installed on the pipeline connecting the intermediate-pressure cylinder 3 with the second high-pressure heater 7; when the unit is in low-load peak shaving operation, according to the electric load demand, the first valve 23 is opened, the second valve 24 is fully opened, and the third valve 25 is fully closed, part of the heat re-steam enters the peak shaving heater 5, and the condensed steam enters the first high-pressure heater 6, and the opening degree of the first valve 23 is adjusted according to the outlet feedwater temperature of the first high-pressure heater 6, and the relationship between the opening degree of the first valve 23 and the outlet feedwater temperature of the first high-pressure heater 6 is preformed according to the thermal performance of the first high-pressure heater 6, when the unit is in high-load operation, the first valve 23 and the second valve 24 are fully closed, and the third valve 25 is fully opened, and the steam inlet of the first high-pressure heater 6 is from the intermediate-pressure cylinder 3; when the unit is in deep peak shaving, the steam of the first high-pressure heater 6 is preferably the steam of the peak shaving heater 5, the heat re-steam heats the boiler 1 feedwater through the peak shaving heater 5, the boiler 1 feedwater temperature is improved, and the denitration effect of the boiler 1 is improved; part of the heat re-steam bypasses the intermediate-pressure cylinder 3 and does not work in the cylinder, so that the unit load is further reduced, and the peak shaving purpose is achieved.

[0028] In the embodiment, the synergistic control module is electrically connected with the molten salt heat storage system, the peak shaving heating system and the industrial steam supply system respectively, and is used for adjusting the operation states of the devices according to the operation parameters of the steam turbine and the industrial steam supply demand. The demand steam quantity of the industrial steam supply system 17 is 20 t / h (higher than the extraction steam quantity provided by the exhaust gas of the third row of the medium-pressure cylinder 3), when the industrial steam supply demand is low, the third valve 25 is closed and the first valve 23 is opened, part of the exhaust gas of the medium-pressure cylinder 3 enters the steam-molten salt heat exchanger 20 to heat the low-temperature molten salt transported by the low-temperature circulating pump 19, and the high-temperature molten salt after heating is stored in the high-temperature molten salt storage tank 22 through the high-temperature circulating pump 21; the exhaust gas of the low-pressure cylinder 4 of the steam turbine enters the condenser 9 to complete the pure condensation power generation cycle, at this time, the industrial steam supply system 17 only receives a small amount of direct extraction steam or suspends steam supply, when the industrial steam supply demand is high, if the direct extraction steam is insufficient, the first valve 23 is closed and the third valve 25 is opened, the high-temperature molten salt enters the steam heat exchanger 16 through the high-temperature circulating pump 21 to heat water to generate steam and supplement the industrial steam supply system 17; at the same time, the second valve 24 can be opened, the high-temperature molten salt enters the molten salt-feedwater steam heat exchanger 15 to heat the feedwater, thereby reducing the energy consumption of the boiler 1 and indirectly improving the steam production capacity, when the temperature or pressure of the industrial steam fluctuates, the peak shaving heater 5 is started to perform secondary heating on the steam entering the industrial steam supply system 17, so as to ensure the stability of the steam supply parameters.

[0029] In the embodiment, the synergistic control module includes a multi-parameter closed-loop controller and a safety interlocking submodule, the multi-parameter closed-loop controller collects the pressure, temperature, flow parameter and SCR denitration inlet flue gas temperature of the industrial steam supply system 17 in real time, adjusts the frequency of the low-temperature circulating pump 19 and the high-temperature circulating pump 21 and the heat re-steam introduction quantity of the peak shaving heater 5 through the fuzzy PID algorithm, and the safety interlocking submodule communicates with the steam turbine DEH system, when the steam admission quantity of the low-pressure cylinder 4 is lower than 40% of the design value, the bypass steam admission of the low-pressure cylinder 4 is triggered and the maximum steam consumption of the industrial steam supply system 17 is limited.

[0030] In the embodiment, the peak shaving heater 5 adopts a variable-area U-shaped tube bundle structure, the surface of the tube bundle is provided with a nano-ceramic anti-fouling coating with a thickness of 0.1-0.3 mm, the peak shaving heater 5 is provided with a magnetostrictive liquid level meter and a steam soot blower, and the synergistic control module controls the operation of the steam soot blower according to the drain liquid level detected by the magnetostrictive liquid level meter.

[0031] When the demand of industrial steam is low (such as at night) or the exhaust steam of the middle pressure cylinder 3 of the steam turbine has surplus energy, the system enters the heat storage state. At this time, the first valve 23 is opened, and part of the exhaust steam (temperature about 350-450℃, pressure about 1-3MPa) of the middle pressure cylinder 3 enters the shell side of the steam molten salt heat exchanger 20; at the same time, the low-temperature molten salt (temperature about 200-250℃, such as sodium nitrate-potassium nitrate mixed molten salt, mass ratio 60:40, melting point about 220℃) in the low-temperature molten salt storage tank 18 is pressurized by the low-temperature circulating pump 19 and sent to the tube side of the steam molten salt heat exchanger 20 at a certain flow rate (dynamically adjusted according to the steam amount). In the heat exchanger, the steam and the molten salt exchange heat through the tube wall: the steam releases latent heat (condenses into condensed water, which can be recycled to the feedwater system), and the molten salt absorbs heat and its temperature rises to 400-500℃. The high-temperature molten salt is transported to the high-temperature molten salt storage tank 22 by the high-temperature circulating pump 21 for storage, completing the “collection-storage” process of energy.

[0032] When the demand of industrial steam is high (such as during the daytime production period) or the amount of direct extraction steam of the steam turbine is insufficient, the system enters the heat release state. At this time, the high-temperature molten salt (400-500℃) in the high-temperature molten salt storage tank 22 is pressurized by the high-temperature circulating pump 21 and distributed to two heat release paths according to the demand: Steam supplement path: the third valve 25 is opened, and the high-temperature molten salt enters the tube side of the steam heat exchanger 16 and exchanges heat with the softened water in the shell side: the molten salt releases sensible heat, and its temperature drops to 200-250℃ (back to the low-temperature molten salt state), the softened water absorbs heat and boils to produce steam (parameters match the demand of industrial steam, such as temperature 250-300℃, pressure 0.8-1.5MPa), and the steam is transported to the industrial steam system 17; Feedwater heating path: the second valve 24 is opened, and the high-temperature molten salt enters the tube side of the molten salt feedwater steam heat exchanger 15 and exchanges heat with the feedwater from the first high-pressure heater 6 in the shell side: the molten salt releases heat and its temperature drops to the low-temperature state, and the feedwater absorbs heat and its temperature rises (such as from 250℃ to 280℃), reducing the fuel consumption of the boiler 1 and indirectly improving the steam production efficiency; The low-temperature molten salt after heat release returns to the low-temperature molten salt storage tank 18, completing the “release-recovery” cycle, and waiting for the next heat storage.

[0033] In this embodiment, as Figure 1As shown, the heat collection system further comprises a first pump body 10 located between the condenser and the counter-pressure heater, a second pump body 13 arranged on a pipeline connecting the deaerator 12 and the boiler, a third pump body 14 arranged on a pipeline connecting the deaerator 12 and the molten salt heat storage system, a low-temperature circulating pump 19 arranged between the low-temperature molten salt storage tank 18 and the steam-molten salt heat exchanger 20, and a high-temperature circulating pump 21 arranged between the high-temperature molten salt storage tank 22 and the molten salt-steam heat exchanger 15. The pumps are arranged on the pipelines to facilitate the delivery of the medium and ensure the reliability of the medium delivery.

[0034] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An industrial steam supply adjustment device for a steam turbine under pure condensing conditions, characterized by: Including steam turbine body, molten salt heat storage system, peak-shaving heating system, heat collection system, industrial steam supply system and coordinated control module; The steam turbine body comprises a boiler (1), a high-pressure cylinder (2), an intermediate-pressure cylinder (3), and a low-pressure cylinder (4) connected in sequence, the outlet of the low-pressure cylinder (4) is connected to a condenser (9), a hot re-steam pipe is provided between the high-pressure cylinder (2) and the intermediate-pressure cylinder (3), and the intermediate-pressure cylinder (3) and the low-pressure cylinder (4) are connected via a connecting pipe; The heat collection system comprises a condenser (9), a low-pressure heater (11) and a deaerator (12) connected in sequence. The molten salt heat storage system comprises a low-temperature molten salt storage tank (18), a high-temperature molten salt storage tank (22), a steam molten salt heat exchanger (20), a molten salt water-steam heat exchanger (15), a low-temperature circulation pump (19) and a high-temperature circulation pump (21), the steam molten salt heat exchanger (20) is connected to the exhaust pipe of the medium-pressure cylinder (3), the molten salt water-steam heat exchanger (15) is connected to the outlet of the deaerator (12), the low-temperature molten salt storage tank (18) is connected to the inlet of the steam molten salt heat exchanger (20) via the low-temperature circulation pump (19), the outlet of the steam molten salt heat exchanger (20) is connected to the high-temperature molten salt storage tank (22), the high-temperature molten salt storage tank (22) is connected to the inlet of the molten salt water-steam heat exchanger (15) via the high-temperature circulation pump (21), and the molten salt water-steam heat exchanger (15) is connected to the outlet of the deaerator (12). The outlet of the device (15) is connected back to the low-temperature molten salt storage tank (18), the outlet of the molten salt water-steam heat exchanger (15) is also connected to the steam heat exchanger (16), and the outlet of the steam heat exchanger (16) is connected to the industrial steam system (17); the peak-shaving heating system includes a peak-shaving heater (5) and a first high-pressure heater (6), and a second high-pressure heater (7); the water-side inlet of the peak-shaving heater (5) is connected to the first high-pressure heater (6) and the second high-pressure heater (7) in sequence, and the water-side outlet of the peak-shaving heater (5) is connected to the boiler (1) water supply pipeline; the high-pressure cylinder (2) is connected to the first high-pressure heater (6) through a pipeline, and the medium-pressure cylinder (3) is connected to the second high-pressure heater (7) through a pipeline; The collaborative control module is electrically connected to the molten salt heat storage system, the peak-shaving heating system and the industrial steam supply system, and is used to adjust the operating status of each device according to the turbine operating parameters and the industrial steam supply demand.

2. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claim 1, characterized in that: A first valve is installed on the pipeline connecting the water side outlet of the peak-shaving heater (5) and the boiler (1).

3. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claim 2, characterized in that: The peak-shaving heater (5) is connected to the medium-pressure cylinder (3) via a pipeline, and a second valve is installed on the connected pipeline.

4. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claim 3, characterized in that: A third valve is installed on the pipeline connecting the medium-pressure cylinder (3) and the second high-pressure heater (7).

5. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to any one of claims 1 to 4, characterized in that: The collaborative control module includes a multi-parameter closed-loop controller and a safety interlock submodule. The multi-parameter closed-loop controller collects the pressure, temperature, flow parameters of the industrial steam system (17) and the SCR denitrification inlet flue gas temperature in real time, and adjusts the frequency of the low-temperature circulation pump (19) and the high-temperature circulation pump (21) and the hot resteam introduction amount of the peak-shaving heater (5) through a fuzzy PID algorithm; the safety interlock submodule communicates with the steam turbine DEH system. When the steam inlet amount of the low-pressure cylinder (4) is lower than 40% of the design value, the low-pressure cylinder bypass steam supply is triggered and the maximum steam consumption of the industrial steam system (17) is limited.

6. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to any one of claims 1 to 5, characterized in that: The peak-shaving heater (5) adopts a variable-area U-shaped tube bundle structure, and a nano-ceramic anti-scaling coating with a thickness of 0.1-0.3 mm is provided on the surface of the tube bundle. A magnetostrictive liquid level gauge and a steam soot blower are provided in the peak-shaving heater (5), and a collaborative control module controls the operation of the steam soot blower according to the hydrophobic liquid level detected by the magnetostrictive liquid level gauge.

7. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claims 1 to 5, characterized in that: The heat collection system further includes a first pump body, which is located between the condenser and the pressure heater.

8. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claim 7, characterized in that: A second pump body is provided on the pipeline connecting the deaerator and the boiler, and a third pump body is provided on the pipeline connecting the deaerator and the molten salt heat storage system.

9. The industrial steam supply adjustment device for a steam turbine under pure condensing conditions according to claim 8, characterized in that: A low-temperature circulation pump is provided between the low-temperature molten salt storage tank and the steam molten salt heat exchanger, and a high-temperature circulation pump is provided between the high-temperature molten salt storage tank and the molten salt water-steam heat exchanger.

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