Fused salt steam generating system suitable for supercritical parameters
By designing the steam-water side in a DC configuration and implementing a cold-start circuit, the problem of difficult steam-water separation under supercritical parameters in existing steam generation systems has been solved, achieving efficient steam-water separation and applicability suitable for operation under supercritical parameters.
Patent Information
- Application Number
- CN202520078982.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-14
AI Technical Summary
Existing steam generation systems struggle to achieve effective steam-water separation under supercritical parameters and operate at low pressures, failing to meet the flexibility and peak-shaving requirements of thermal power units.
The steam-water side design adopts a direct-flow configuration, including a preheater, evaporator, vertical steam-water separator, and superheater. It features a cold start-up circuit and uses a hairpin heat exchanger to achieve efficient steam-water separation and heat exchange, making it suitable for operation with supercritical parameters.
It achieves efficient steam-water separation under supercritical parameters, applicable to operating parameters at any pressure, especially supercritical parameters, thus improving the flexibility and applicability of steam generation systems.
Smart Images
Figure CN223740765U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to solar thermal power generation technical field and thermal power generation field, more specifically, the utility model relates to a molten salt steam generating system suitable for supercritical parameters. BACKGROUND
[0002] In the field of solar thermal power generation technology and thermal power generation, the molten salt heat storage coupled supercritical unit flexible peak shaving steam generating system has a specific operation mode, which uses molten salt as heat transfer medium to generate high-temperature and high-pressure steam for steam turbine power generation.
[0003] At present, the existing steam generating system has many characteristics and limitations. On the one hand, the operating pressure is mostly below the critical parameter, and the steam-water side usually adopts natural circulation or forced circulation mode with a steam drum. This results in that when applied to thermal power unit flexible peak shaving, the generated steam pressure is low, which can only be generally used for medium and low pressure industrial steam supply, or in the boiler low load (below critical pressure) operation stage, it matches with the boiler main steam parameters and acts as a supplementary steam for steam turbine power generation.
[0004] On the other hand, when the unit is in supercritical parameter operation, due to the fact that the steam-water density difference is no longer obvious, the existing steam-water / molten salt steam generating system is difficult to realize effective steam-water separation, and thus cannot meet the coupling demand with the boiler. Therefore, it is urgent to improve the existing steam generating system and improve its operating parameters to adapt to the operating conditions of supercritical units. SUMMARY
[0005] The utility model provides a molten salt steam generating system suitable for supercritical parameters, which adopts a straight-through form on the steam-water side, can be applied to any pressure operating parameter, especially suitable for supercritical parameters, and is provided with a cold start loop, which can be used for start-up and low load operation state.
[0006] In order to realize these purposes and other advantages of the utility model, the utility model provides a molten salt steam generating system suitable for supercritical parameters, which comprises:
[0007] A preheater, the inlet of which is connected with one end of a first pipeline, and the other end of the first pipeline is connected with a feedwater end, wherein a first electric valve is arranged on the first pipeline, and an electric heater is arranged on a bypass pipeline connected in parallel with the first pipeline;
[0008] An evaporator, the inlet of which is connected with the outlet of the preheater;
[0009] A vertical steam-water separator, the inlet of which is connected with the outlet of the evaporator;
[0010] A superheater, the inlet of which is connected with the steam outlet of the vertical steam-water separator;
[0011] The liquid outlet of the vertical steam-water separator is connected with one end of the second pipeline, the other end of the second pipeline is connected with the other end of the first pipeline, a circulating pump and a second electric valve are arranged on the second pipeline, and the supercritical steam-water in the preheater, the evaporator and the superheater exchanges heat with the molten salt.
[0012] Preferably, the preheater, the evaporator and the superheater are all hairpin heat exchangers, and the hairpin heat exchanger comprises:
[0013] A U-shaped heat exchange assembly comprising a U-shaped cylinder body and a U-shaped heat exchange pipe arranged in the U-shaped cylinder body, wherein the supercritical steam-water flows in the U-shaped heat exchange pipe, and the molten salt flows in the channel between the U-shaped heat exchange pipe and the U-shaped cylinder body;
[0014] A flow guide device is arranged at two ends of the U-shaped heat exchange assembly, and the flow guide device comprises:
[0015] An outer cylinder is connected with the tube plate and the U-shaped cylinder body at two ends thereof;
[0016] An inner cylinder is arranged in the outer cylinder, one end of the inner cylinder is connected with the U-shaped cylinder body, a plurality of long circular holes are arranged on the inner cylinder at equal intervals in the circumferential direction, and the end portion of the U-shaped heat exchange pipe penetrates through the inner cylinder and the tube plate and is connected with the tube box;
[0017] The molten salt inlet is arranged on the wall of one of the outer cylinders, the supercritical steam-water outlet is arranged on the tube box at the same side as the molten salt inlet, the molten salt outlet is arranged on the wall of the other outer cylinder, and the supercritical steam-water inlet is arranged on the tube box at the same side as the molten salt outlet.
[0018] Preferably, a reheater is further arranged, the outlet of the superheater is connected with the inlet of the high-pressure cylinder of the steam turbine, the outlet of the high-pressure cylinder of the steam turbine is connected with the inlet of the reheater, the outlet of the superheater is further connected with one end of a third pipeline, the other end of the third pipeline is connected with the inlet of the reheater, and a valve and a pressure reducing valve are arranged on the third pipeline.
[0019] Preferably, a hot salt tank is further arranged, which is connected with the molten salt inlets of the reheater and the superheater, the molten salt outlets of the superheater and the reheater are both connected with the molten salt inlet of the evaporator, the molten salt outlet of the evaporator is connected with the molten salt inlet of the preheater, and the molten salt outlet of the preheater is connected with the cold salt tank.
[0020] Preferably, a third electric valve and a fourth electric valve are further arranged on the bypass pipeline, the third electric valve is connected with the inlet of the electric heater, and the fourth electric valve is connected with the outlet of the electric heater.
[0021] Preferably, a fifth electric valve and an electric regulating valve are further arranged on the second pipeline, and the second electric valve, the circulating pump, the fifth electric valve and the electric regulating valve are sequentially arranged on the second pipeline from the position close to the vertical steam-water separator to the position far away from the vertical steam-water separator.
[0022] Preferably, a drain expansion vessel is further arranged, which is connected with the vertical steam-water separator, and a sixth electric valve is further arranged on a fourth pipeline between the drain expansion vessel and the vertical steam-water separator.
[0023] The utility model at least includes following beneficial effects:
[0024] Firstly, in the utility model, the steam-water side adopts a direct current form, no drum is arranged, and the feed water sequentially flows through a preheater, an evaporator, an upper portion of a vertical steam-water separator and a superheater, so that the preheating, evaporation and superheating processes of water are completed, superheated steam is generated, and the utility model can be applied to any pressure operation parameter, and is particularly suitable for supercritical parameters.
[0025] Secondly, the utility model further arranges a cold-state starting loop, that is, the preheater, the evaporator, the vertical steam-water separator, the circulating pump and the electric heater form a circulating heating loop, when the temperature of the feed water is lower than the solidification temperature of the molten salt at the initial stage of starting, the water in the preheater, the evaporator and the vertical steam-water separator is circularly heated, the steam generated by heating enters the superheater from the vertical steam-water separator, after the preheating is completed, the electric heater is closed, the first electric valve on the first pipeline is opened, the feed water is supplemented, the molten salt is introduced, the steam and water in the preheater, the evaporator and the superheater are heat-exchanged with the molten salt, the temperature and flow of the molten salt inlet are adjusted, the feed water flow is increased, until the working medium out of the evaporator is all steam, then the circulating pump and the second electric valve are closed, and the steam-water side enters the direct current mode.
[0026] Thirdly, the preheater, the evaporator and the superheater are all hairpin heat exchangers, flow guide devices are arranged at the molten salt inlet and the molten salt outlet positions, a plurality of long circular holes are arranged on the inner cylinder of the flow guide device at equal intervals in the circumferential direction, the molten salt is uniformly introduced into the passage between the U-shaped heat exchange pipe and the U-shaped cylinder body, and the U-shaped heat exchange pipe is reduced.
[0027] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description
[0028] Figure 1 This is a schematic diagram showing the relationship between the present invention and the molten salt steam generation system with supercritical parameters;
[0029] Figure 2 This is a schematic diagram of the hairpin heat exchanger described in this utility model. Detailed Implementation
[0030] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.
[0031] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.
[0032] It should be noted that, unless otherwise specified, the experimental methods described in the following embodiments are conventional methods, and the reagents and materials described are commercially available. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The terms "lateral," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0033] like Figure 1The utility model provides a kind of molten salt steam generation system suitable for supercritical parameter, including: preheater 1, its inlet is connected with the one end of first pipeline 5, the other end of first pipeline 5 is communicated with feedwater end 25, wherein, a first electric valve 23 is arranged on the first pipeline 5, and a bypass pipeline, which is connected with the first pipeline 5 in parallel, is provided with an electric heater 6;Evaporator 2, its inlet is communicated with the outlet of preheater 1;Vertical steam-water separator 14, its inlet is communicated with the outlet of evaporator 2;Superheater 3, its inlet is communicated with the steam outlet of vertical steam-water separator 14;Wherein, the liquid outlet of vertical steam-water separator 14 is communicated with the one end of second pipeline 13, the other end of second pipeline 13 is communicated with the other end of first pipeline 5, circulating pump 11 and second electric valve 12 are arranged on the second pipeline 13, and supercritical steam-water in preheater 1, evaporator 2 and superheater 3 is exchanged with molten salt.
[0034] In the above embodiment, feedwater end 25 is water valve group, which can control the water flow into first pipeline 5. The first pipeline 5 and the bypass pipeline are connected in parallel, when the first electric valve 23 is closed, and the electric heater 6 is opened, the feedwater is heated by the electric heater 6 and then enters the preheater 1, when the first electric valve 23 is opened, and the electric heater 6 is closed, the feedwater is directly heated into the preheater 1. When the first electric valve 23 is opened, the third electric valve 7 and the fourth electric valve 8 can also be set to prevent the feedwater from entering the bypass pipeline where the electric heater 6 is arranged, the third electric valve 7 is connected with the inlet of the electric heater 6, and the fourth electric valve 8 is connected with the outlet of the electric heater 6. The preheater 1 is communicated with the evaporator 2 through the fifth pipeline 17, and the evaporator 2 is communicated with the vertical steam-water separator 14 through the sixth pipeline 18.
[0035] In the above embodiment, a cold start-up loop is also provided, that is, the preheater 1, the evaporator 2, the vertical steam-water separator 14, the circulating pump 11 and the electric heater 6 form a circulating heating loop. In the initial start-up period, the second electric valve 12, the third electric valve 7 and the fourth electric valve 8 are closed, the first electric valve 23 is opened, and water is injected into the preheater 1, the evaporator 2 and the vertical steam-water separator 14 through the first pipeline 5, and the water injection is stopped after the water level of the vertical steam-water separator 14 is visible. If the temperature of the feed water is lower than the solidification temperature of the molten salt, the second electric valve 12 and the circulating pump 11 are opened, the third electric valve 7, the electric heater 6 and the fourth electric valve 8 are opened, and the first electric valve 23 is closed, so as to circulate and heat the water in the preheater 1, the evaporator 2 and the vertical steam-water separator 14, and the steam generated by heating enters the superheater 3 from the vertical steam-water separator 14. After the preheating is completed, the electric heater 6, the third electric valve 7 and the fourth electric valve 8 are closed, the first electric valve 23 is opened, and water is injected into the superheater 3, the evaporator 2 and the preheater 1, so that the steam and water in the preheater 1, the evaporator 2 and the superheater 3 exchange heat with the molten salt, and the temperature and flow rate of the molten salt inlet are adjusted, and the flow rate of the feed water is increased until all the working medium discharged from the evaporator 2 is steam, then the circulating pump 11 and the second electric valve 12 are closed, and the steam-water side enters the direct current mode. Therefore, the vertical steam-water separator 14 provided by the utility model can be used for steam-water separation during start-up and low-load operation of the molten salt steam generating system, and can also be applied to the case under supercritical parameter operation pressure.
[0036] In one specific embodiment, the preheater 1, the evaporator 2 and the superheater 3 are all hairpin heat exchangers, and the hairpin heat exchanger comprises:
[0037] A U-shaped heat exchange assembly comprises a U-shaped cylinder 30 and a U-shaped heat exchange pipe 31 arranged inside the U-shaped cylinder, wherein supercritical steam flows in the U-shaped heat exchange pipe 31, and molten salt flows in the channel between the U-shaped heat exchange pipe 31 and the U-shaped cylinder 30;
[0038] A flow guide device is arranged at both ends of the U-shaped heat exchange assembly, and the flow guide device comprises:
[0039] An outer cylinder 32 is connected with the tube plate 34 and the U-shaped cylinder 30 at both ends thereof;
[0040] An inner cylinder 33 is arranged inside the outer cylinder 32, one end of the inner cylinder 33 is connected with the U-shaped cylinder 30, a plurality of long circular holes 41 are arranged on the inner cylinder 33 at equal intervals along the circumference, and the end portion of the U-shaped heat exchange pipe 31 penetrates through the inner cylinder 33 and the tube plate 34 and is connected with the tube box 39 in communication;
[0041] Wherein, the molten salt inlet 35 is arranged on the cylinder wall of one outer cylinder, the supercritical water outlet 37 is arranged on the header on the same side of the molten salt inlet, the molten salt outlet 36 is arranged on the cylinder wall of the other outer cylinder, and the supercritical water inlet 38 is arranged on the header 39 on the same side of the molten salt outlet.
[0042] In the above embodiment, the preheater 1, the evaporator 2 and the superheater 3 are all arranged as hairpin heat exchangers, and have the same structure. The flow guide device is arranged at both ends of the U-shaped heat exchange assembly, and a plurality of long circular holes 41 are arranged on the inner cylinder 33 of the flow guide device at equal intervals in the circumferential direction. The molten salt enters the gap between the outer cylinder 32 and the inner cylinder 33 through the molten salt inlet 35 arranged on the cylinder wall of the outer cylinder 32, and then enters the passage between the U-shaped heat exchange pipe 31 and the U-shaped cylinder body 30 through the long circular holes 41 arranged on the inner cylinder 33 in the circumferential direction. The molten salt flows along the baffle plate 40 in the passage. At the molten salt outlet 36, the molten salt enters the gap between the inner cylinder 33 and the outer cylinder 32 through the long circular holes 41 arranged on the inner cylinder 33 in the circumferential direction, and then flows out through the molten salt outlet 36 arranged on the outer cylinder 32. In this way, the molten salt can uniformly enter and exit the U-shaped heat exchange assembly, reducing the erosion of the U-shaped heat exchange pipe 31 and facilitating the safe operation of the entire steam generation system.
[0043] In one specific embodiment, a reheater 4 is further included, the outlet of the superheater 3 is in communication with the inlet of the high-pressure cylinder 26 of the steam turbine, and the outlet of the high-pressure cylinder 26 of the steam turbine is in communication with the inlet of the reheater 4. In addition, the outlet of the superheater 3 is also in communication with one end of a third pipeline 20, and the other end of the third pipeline 20 is in communication with the inlet of the reheater 4. A valve 21 and a pressure reducing valve 22 are arranged on the third pipeline 20.
[0044] In the above embodiment, the superheated steam from the outlet of the superheater 3 enters the high-pressure cylinder 26 of the steam turbine through the seventh pipeline 19 to do work on the high-pressure cylinder 26 of the steam turbine. The low-temperature and low-pressure steam reenters the reheater 4 to be heated, and then can do work on the intermediate-pressure cylinder 27 of the steam turbine. The third pipeline 20, the valve 21 and the pressure reducing valve 22 are arranged to, at the initial stage of starting, when the temperature of the feed water is lower than the solidification temperature of the molten salt, the steam generated by the circulating loop enters the superheater 3 from the vertical steam-water separator 14, is heated in the superheater 3, and then enters the reheater 4 through the third pipeline 20 to preheat the superheater 3 and the reheater 4 system, and the molten salt side electric heating preheating can also be started.
[0045] In one embodiment, a hot salt tank 28 is further included, which is connected to the molten salt inlet of the reheater 4 and the molten salt inlet of the superheater 3, wherein the molten salt outlet of the superheater 3 and the molten salt outlet of the reheater 4 are connected to the molten salt inlet of the evaporator 2, the molten salt outlet of the evaporator 2 is connected to the molten salt inlet of the preheater 1, and the molten salt outlet of the preheater 1 is connected to a cold salt tank 29.
[0046] In the above embodiment, the molten salt passes through the superheater 3 and the reheater 4, and then sequentially passes through the evaporator 2 and the preheater 1. Therefore, in the preheater 1, the evaporator 2, the superheater 3 and the reheater 4, the direction of the supercritical steam flow is opposite to the direction of the molten salt flow.
[0047] In one embodiment, a fifth electric valve 10 and an electric regulating valve 9 are further arranged on the second pipeline 13, wherein the second electric valve 12, the circulating pump 11, the fifth electric valve 10 and the electric regulating valve 9 are sequentially arranged on the second pipeline 13 from the position close to the vertical steam-water separator 14 to the position away from the vertical steam-water separator 14. The electric regulating valve 9 is used to control the flow rate of the circulation.
[0048] In one embodiment, a drain expansion vessel 24 is further included, which is connected to the vertical steam-water separator 14, and a sixth electric valve 15 is further arranged on the fourth pipeline 16 between the drain expansion vessel 24 and the vertical steam-water separator 14. When the water level in the vertical steam-water separator 14 is too high, the water level can be controlled by adjusting the sixth electric valve 15.
[0049] The specific working process of the molten salt steam generation system suitable for supercritical parameters is as follows:
[0050] S1, in the initial stage of starting, the second electric valve 12, the fifth electric valve 10 and the sixth electric valve are closed, the third electric valve 7 and the fourth electric valve 8 are closed, the first electric valve 23 is opened, and water is injected into the preheater 1, the evaporator 2 and the vertical steam-water separator 14 through the first pipeline 5. After the water level in the vertical steam-water separator 14 is visible, the water injection is stopped.
[0051] S2, when the feedwater temperature is lower than the solidification temperature of the molten salt, the second electric valve 12, the fifth electric valve 10, the third electric valve 7 and the fourth electric valve 8 are opened, the first electric valve 23 is closed, the electric heater 6 and the circulating pump 11 are turned on, and the water in the preheater 1, the evaporator 2 and the vertical steam-water separator 14 is heated by circulation. The steam generated by heating enters the superheater 3 from the vertical steam-water separator 14, enters the reheater 4 through the third pipeline 20, preheats the superheater 3 and the reheater 4, and simultaneously preheats the molten salt side with electric heating.
[0052] S3, preheating ends, the third electric valve 7 and the fourth electric valve 8 are closed, the hot molten salt is imported into the reheater 4, the superheater 3, the evaporator 2 and the preheater 1, the feed water is opened, when the water level is high, the water level can be controlled by adjusting the sixth electric valve.
[0053] S4, gradually increasing the molten salt inlet temperature, flow, while increasing the feed water flow, matching heat transfer, gradually increasing temperature and pressure, with the increase of load, the circulating water gradually decreases, the feed water flow gradually increases, when the circulating water will be zero, the second electric valve 12 and the fifth electric valve 10 are closed, at this time, the working medium coming out of the evaporator 2 is all steam, gradually closing the sixth electric valve, the steam-water side enters the direct current mode.
[0054] The number of devices and the processing scale described herein are used to simplify the description of the utility model. The application, modification and change of the utility model are obvious to those skilled in the art.
[0055] Although the embodiments of the utility model have been disclosed as above, it is not limited to the application and the embodiment listed in the specification, it can be fully applied to various fields suitable for the utility model, and other modifications can be easily realized by those skilled in the art, therefore, the utility model is not limited to specific details and the figures shown and described herein without departing from the general concept defined by the claims and the equivalent scope.
Claims
1. A molten salt steam generation system suitable for supercritical parameters, characterized in that, The application relates to a supercritical water heater, which comprises the following parts: a preheater, the inlet of which is connected with one end of a first pipeline, the other end of the first pipeline is connected with a water supply end, wherein a first electric valve is arranged on the first pipeline, and an electric heater is arranged on a bypass pipeline which is connected with the first pipeline in parallel; an evaporator, the inlet of which is connected with the outlet of the preheater; a vertical steam-water separator, the inlet of which is connected with the outlet of the evaporator; a superheater, the inlet of which is connected with the steam outlet of the vertical steam-water separator; wherein the liquid outlet of the vertical steam-water separator is connected with one end of a second pipeline, the other end of the second pipeline is connected with the other end of the first pipeline, a circulating pump and a second electric valve are arranged on the second pipeline, and supercritical steam and water in the preheater, the evaporator and the superheater are in heat exchange with molten salt.
2. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 1 wherein, The preheater, the evaporator and the superheater are all hairpin heat exchangers, and the hairpin heat exchanger comprises: a U-shaped heat exchange assembly which comprises a U-shaped cylinder and a U-shaped heat exchange pipe arranged in the U-shaped cylinder, wherein supercritical steam and water flow in the U-shaped heat exchange pipe, and molten salt flows in the channel between the U-shaped heat exchange pipe and the U-shaped cylinder; two flow guide devices which are arranged at two ends of the U-shaped heat exchange assembly respectively, and the flow guide device comprises: an outer cylinder which is connected with a tube plate and the U-shaped cylinder at two ends respectively; an inner cylinder which is arranged in the outer cylinder, one end of the inner cylinder is connected with the U-shaped cylinder, a plurality of long circular holes are arranged on the inner cylinder at equal intervals in the circumferential direction, and the end of the U-shaped heat exchange pipe is connected with a tube box through the inner cylinder and the tube plate; wherein a molten salt inlet is arranged on the wall of one outer cylinder, a supercritical steam and water outlet is arranged on the tube box at the same side of the molten salt inlet, a molten salt outlet is arranged on the wall of the other outer cylinder, and a supercritical steam and water inlet is arranged on the tube box at the same side of the molten salt outlet.
3. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 2 wherein, The application further comprises a reheater, the outlet of the superheater is connected with the inlet of a high-pressure cylinder of a steam turbine, the outlet of the high-pressure cylinder of the steam turbine is connected with the inlet of the reheater, wherein the outlet of the superheater is further connected with one end of a third pipeline, the other end of the third pipeline is connected with the inlet of the reheater, and a valve and a pressure reducing valve are arranged on the third pipeline.
4. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 3 wherein, The application further comprises a hot salt tank which is connected with the molten salt inlets of the reheater and the superheater, wherein the molten salt outlets of the superheater and the reheater are both connected with the molten salt inlet of the evaporator, the molten salt outlet of the evaporator is connected with the molten salt inlet of the preheater, and the molten salt outlet of the preheater is connected with a cold salt tank.
5. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 1 wherein, A third electric valve and a fourth electric valve are further arranged on the bypass pipeline, the third electric valve is connected with the inlet of the electric heater, and the fourth electric valve is connected with the outlet of the electric heater.
6. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 1 wherein, A fifth electric valve and an electric regulating valve are further arranged on the second pipeline, wherein the second electric valve, the circulating pump, the fifth electric valve and the electric regulating valve are arranged on the second pipeline in sequence from the position close to the vertical steam-water separator to the position far away from the vertical steam-water separator.
7. The molten salt steam generator system suitable for supercritical parameters as claimed in claim 1 wherein, A hydrophobic flash tank is also included, which is in communication with the vertical steam-water separator, and a sixth electric valve is also arranged on a fourth pipeline between the hydrophobic flash tank and the vertical steam-water separator.