CN218380617U - Thermal power generating unit steam extraction heat accumulation formula system of adjusting peak based on fused salt heat-retaining - Google Patents
Thermal power generating unit steam extraction heat accumulation formula system of adjusting peak based on fused salt heat-retaining Download PDFInfo
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Abstract
The utility model discloses a thermal power generating unit takes out vapour heat accumulation formula system of adjusting peak based on fused salt heat-retaining, including boiler, high pressure jar, intermediate pressure jar, low pressure jar, condenser, congeal pump, low pressure heating unit, oxygen-eliminating device, feed pump, high pressure heating unit, fused salt cold can, low temperature fused salt pump, steam cooler, fused salt hot can, high temperature fused salt pump, feed water heater, steam condenser and heat supply network water heater. The utility model discloses can the system utilize fused salt storage steam heat, realize large capacity, high-quality heat-retaining, simultaneously, the utility model discloses the system can realize that the low pressure jar zero is exerted power, and the degree of depth reduces thermal power generating unit electricity and exerts power, promotes the unit flexibility by a wide margin, realizes thermal power generating unit degree of depth peak regulation, has good economic benefits.
Description
Technical Field
The utility model belongs to the technical field of the energy storage, concretely relates to thermal power generating unit takes out vapour heat accumulation formula system of adjusting peak based on fused salt heat-retaining.
Background
With the continuous improvement of the environmental protection target, higher requirements are put forward on the flexibility of the coal-electric unit. In order to further improve the flexibility and the adjusting capability and promote clean low-carbon transformation in the power industry, the coal-electric machine set needs to be modified and upgraded. The improvement and the upgrade make clear requirements on the peak regulation capacity of the unit, the generalized requirement on the peak regulation capacity under the pure condensing working condition is that the minimum power generation output reaches 35% of rated load, the peak regulation capacity of the minimum power generation output reaching 40% of rated load in 6h in a single day is realized by the thermoelectric decoupling strive when the heating thermoelectric unit operates in the heat supply period, and other types of units need to take measures to reduce the minimum power generation output as much as possible.
The coal-electricity unit has large basic capacity, large energy to be stored during deep peak regulation and high quality, the existing electrochemical energy storage, hot water tank energy storage and the like can not meet the deep peak regulation requirement of the coal-electricity unit, and the fused salt heat storage has the advantages of large capacity, high heat energy grade and the like, so the fused salt heat storage system is suitable for the deep peak regulation of the coal-electricity unit. The molten salt heat storage is sensible heat storage of molten inorganic salt, heat is stored by utilizing the change of the temperature of molten salt, and a double-tank molten salt heat storage system is generally adopted. The fused salt heat storage is mostly applied to solar thermal power stations, and a fused salt heat storage peak regulation system applied to large coal-electricity units is rare.
Under the low-load working condition, the coal-electric unit has low main steam (hot re-steam) pressure and low steam condensation temperature. In the heat contained in the steam, sensible heat accounts for about 30%, and latent heat accounts for 70%. The conventional heat storage peak regulation adopts a hot water tank or solid heat storage, has small energy storage capacity and low heat storage quality, is only used for supplying heat for seasonal residents or heating low-addition condensed water, and has low economic benefit. The fused salt heat storage has the advantages of large capacity, high heat energy grade and the like, but is limited by the fact that the low-point use temperature of the fused salt is high (140-260 ℃), ten-thousand-ton fused salt is needed for storing latent heat of steam, engineering investment is huge, and application of the fused salt heat storage in deep peak shaving of a coal-electric machine set is hindered.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, a thermal power generating unit takes out vapour heat accumulation formula system of adjusting peak based on fused salt heat-retaining is provided, this system utilizes fused salt storage steam sensible heat, utilize condensate water or heat supply network water storage steam latent heat, can large capacity, high-quality heat-retaining, realize unit degree of depth peak regulation, system fused salt flow is reduced to hundred tons by ten thousand tons by a wide margin, reduce the engineering investment by a wide margin, and simultaneously, the latent heat of storage adds the boiler feedwater, reduce the high-quality steam that highly adds the extraction, good economic benefits has.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a thermal power generating unit steam extraction heat storage type peak regulation system based on molten salt heat storage comprises a boiler, a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a condenser, a condensate pump, a low-pressure heating unit, a deaerator, a water feed pump, a high-pressure heating unit, a molten salt cooling tank, a low-temperature molten salt pump, a steam cooler, a molten salt heating tank, a high-temperature molten salt pump, a water feed heater, a steam condenser and a heat supply network water heater;
the steam outlet of the boiler is communicated with the inlet of the high-pressure cylinder through a pipeline, the outlet of the high-pressure cylinder is communicated with the inlet of the reheat steam of the boiler through a pipeline, the outlet of the reheat steam of the boiler is connected with the inlet of the intermediate pressure cylinder through a pipeline, the intermediate pressure cylinder, the low-pressure cylinder and the condenser are sequentially connected through a pipeline, the condenser condensate pump, the low-pressure heating unit, the deaerator, the water feeding pump and the high-pressure heating unit are sequentially connected through a pipeline, and the outlet of the high-pressure heating unit is connected with the feed water inlet of the boiler through a pipeline;
the molten salt cooling tank, the low-temperature molten salt pump, the molten salt side of the steam cooler, the molten salt heating tank, the high-temperature molten salt pump and the molten salt side of the feed water heater are sequentially connected through a molten salt pipeline; the water side inlet and the water side outlet of the feed water heater are respectively communicated with the inlet and the outlet of the high-pressure heating unit through pipelines;
the steam side inlet of the steam cooler is connected with the boiler through a pipeline, and the steam side outlet of the steam cooler is respectively communicated with the steam inlet of the steam condenser and the steam inlet of the heat supply network water heater through pipelines; the condensed water outlet of the steam condenser and the condensed water outlet of the heat supply network water heater are converged by a pipeline and then communicated with a deaerator; the condensed water inlet and outlet of the steam condenser are respectively communicated with the inlet and outlet of the low-pressure heating unit through pipelines;
the steam condenser condensed water inlet, the steam condenser condensed water outlet, the heat supply network water heater steam inlet, the heat supply network water heater condensed water outlet, a collecting pipe of the heat supply network water heater condensed water outlet and the steam condenser condensed water outlet, a feed water heater water side inlet, a feed water heater water side outlet, the steam condenser condensed water inlet and the steam condenser condensed water outlet are respectively provided with a first shut-off valve, a second shut-off valve, a third shut-off valve, a fourth shut-off valve, a fifth shut-off valve, an eighth shut-off valve, a fourth regulating valve, a seventh shut-off valve and a third regulating valve.
Preferably, the utility model discloses thermal power generating unit takes out vapour heat accumulation formula system of adjusting peak based on fused salt heat-retaining still includes the generator, and high pressure jar, intermediate pressure jar and low pressure jar main shaft and generator are connected.
Preferably, the steam side inlet of the steam cooler is connected with the steam outlet of the boiler through a pipeline, and a first regulating valve is arranged on the connecting pipeline.
Preferably, the steam side inlet of the steam cooler is connected with the hot re-steam outlet of the boiler through a pipeline, and a first regulating valve is arranged on the connecting pipeline.
Preferably, a heat supply network water inlet and a heat supply network water outlet of the heat supply network water heater are provided with a heat supply network water inlet pipeline and a heat supply network water return pipeline, a six-number shutoff valve is arranged on the water inlet pipeline, and a two-number regulating valve is arranged on the water outlet pipeline.
Preferably, the low-pressure heating unit is in a form of a one-stage low-pressure heater or a multi-stage low-pressure heater connected in series, and the pipeline connecting point of the low-pressure heating unit and the steam condenser is positioned at the inlet or the outlet of any low-pressure heater.
Preferably, the high-pressure heating unit is in a structure formed by connecting a first-stage high-pressure heater or a multi-stage high-pressure heater in series, and the pipeline connecting point of the high-pressure heating unit and the water supply heater is positioned at the inlet or the outlet of any high-pressure heater.
Preferably, the condensate line of the steam condenser leads to an interstage drain of a condenser or a high-pressure heating unit or to an interstage drain of a low-pressure heating unit.
Preferably, a coal-fired boiler, a gas-fired boiler, an oil-fired boiler, a biomass boiler, a waste heat boiler or an electrode boiler.
The utility model discloses following beneficial effect has:
the utility model discloses thermal power generating unit steam extraction heat accumulation formula peak regulation system based on fused salt heat storage utilizes fused salt heat storage to realize thermal power generating unit degree of depth peak regulation, improves thermal power generating unit's flexibility, stores the steam sensible heat in the fused salt through the steam cooler, stores the latent heat of steam in condensate water or heat supply network water through steam condenser or heat supply network water heater, can reduce the fused salt volume of heat-retaining process by a wide margin; the heat stored by the fused salt is used for heating boiler feed water through the feed water heater, so that the steam extraction amount of the high-pressure heater can be reduced, the steam work is increased, and the heat consumption of the unit is reduced. To sum up, the utility model discloses a thermal power generating unit heat accumulation formula of drawing steam peak regulation system based on fused salt heat-retaining utilizes fused salt storage steam sensible heat, utilizes condensate water or heat supply network water storage steam latent heat, can large capacity, high-quality heat-retaining, realizes unit degree of depth peak regulation, and system fused salt flow reduces to hundred tons by a wide margin by ten thousand tons grades, reduces the engineering investment by a wide margin, and simultaneously, the latent heat of storage adds the boiler feedwater, reduces the high-quality steam that highly adds the extraction, has good economic benefits.
Drawings
Fig. 1 is the utility model discloses thermal power generating unit takes out steam heat accumulation formula peak regulation system's based on fused salt heat-retaining structural schematic diagram.
In the figure, 1 is a boiler, 2 is a high pressure cylinder, 3 is an intermediate pressure cylinder, 4 is a low pressure cylinder, 5 is a condenser, 6 is a condensate pump, 7 is a low pressure heating unit, 8 is a deaerator, 9 is a water feed pump, 10 is a high pressure heating unit, 11 is a generator, 12 is a molten salt cold tank, 13 is a low temperature molten salt pump, 14 is a steam condensing unit, 15 is a molten salt hot tank, 16 is a high temperature molten salt pump, 17 is a water feed heater, 18 is a steam condenser, 19 is a hot grid water heater, 20 is a first regulating valve, 21 is a first shut-off valve, 22 is a second shut-off valve, 23 is a third shut-off valve, 24 is a fourth shut-off valve, 25 is a fifth shut-off valve, 26 is a sixth shut-off valve, 27 is a second regulating valve, 28 is an eighth shut-off valve, 29 is a fourth regulating valve, 30 is a seventh shut-off valve, and 31 is a third regulating valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
as shown in fig. 1, the utility model discloses thermal power generating unit steam extraction heat accumulation formula peak regulation system based on fused salt heat storage includes boiler 1, high-pressure cylinder 2, intermediate pressure cylinder 3, low-pressure cylinder 4, condenser 5, condensate pump 6, low pressure heating unit 7, oxygen-eliminating device 8, feed pump 9, high pressure heating unit 10, generator 11; the system also comprises a molten salt cold tank 12, a low-temperature molten salt pump 13, a steam cooler 14, a molten salt hot tank 15, a high-temperature molten salt pump 16, a water supply heater 17, a steam condenser 18 and a heat supply network water heater 19;
the steam outlet of a boiler 1 is communicated with the inlet of a high-pressure cylinder 2 through a pipeline, the outlet of the high-pressure cylinder 2 is communicated with the reheat steam inlet of the boiler 1 through a pipeline, the reheat steam outlet of the boiler 1 is communicated with the inlet of an intermediate pressure cylinder 3 through a pipeline, the intermediate pressure cylinder 3, a low-pressure cylinder 4 and a condenser 5 are sequentially communicated through pipelines, the outlet of the condenser 5, the inlet of a condensate pump 6, the inlet of a low-pressure heating unit 7, the inlet of a deaerator 8, the inlet of a water feed pump 9 and the inlet of a high-pressure heating unit 10 are sequentially connected through pipelines, and the outlet of the high-pressure heating unit 10 is communicated with the water feed inlet of the boiler 1 through a pipeline; the main shafts of the high pressure cylinder 2, the intermediate pressure cylinder 3 and the low pressure cylinder 4 are connected with a generator 11;
the outlet of the molten salt cold tank 12 is connected with the inlet of the low-temperature molten salt pump 13, the outlet of the low-temperature molten salt pump 13 is communicated with the molten salt side inlet (cold inlet) of the steam cooler 14, the molten salt side outlet (cold outlet) of the steam cooler 14 is connected with the inlet of the molten salt hot tank 15, the inlet of the high-temperature molten salt pump 16 is communicated with the molten salt hot tank 15, the outlet of the high-temperature molten salt pump 16 is connected with the molten salt side inlet of the water supply heater 17, and the molten salt side outlet of the water supply heater 17 is connected with the inlet of the molten salt cold tank 12 to form closed circulation;
the steam side inlet of the steam cooler 14 is communicated with the steam outlet of the boiler 1 through a pipeline, a first regulating valve 20 is arranged on the pipeline, the steam side outlet of the steam cooler 14 is divided into two paths through a pipeline, the two paths are respectively communicated with the steam inlet of the steam condenser 18 and the steam inlet of the heat supply network water heater 19, and a first shut-off valve 21 and a third shut-off valve 23 are respectively arranged on the two paths of pipelines of the steam inlet of the steam condenser 18 and the heat supply network water heater 19; a condensate outlet of the steam condenser 18 and a condensate outlet of the heat supply network water heater 19 are converged by a pipeline and then communicated with an inlet of the deaerator 8, a second shut-off valve 22 and a fourth shut-off valve 24 are respectively arranged on the condensate outlet of the steam condenser 18 and the heat supply network water heater 19, and a fifth shut-off valve 25 is arranged on the converging pipe; a heat supply network water inlet and outlet of the heat supply network water heater 19 is provided with a heat supply network water inlet and return pipeline, a six-number shutoff valve 26 is arranged on a water inlet pipeline of the heat supply network water inlet and return pipeline, and a two-number regulating valve 27 is arranged on a water outlet pipeline of the heat supply network water inlet and return pipeline; the condensed water inlet of the steam condenser 18 is communicated with the inlet of the low-pressure heating unit 7 through a pipeline, a seven-number shutoff valve 30 is arranged on the pipeline, the condensed water outlet of the steam condenser 18 is communicated with the outlet of the low-pressure heating unit 7 through a pipeline, and a three-number regulating valve 31 is arranged on the pipeline. The inlet of the water side of the water supply heater 17 is communicated with the inlet of the high-pressure heating unit 10 through a pipeline, an eight-number shutoff valve 28 is arranged on the pipeline, the outlet of the water side of the water supply heater 17 is communicated with the outlet of the high-pressure heating unit 10 through a pipeline, and a four-number regulating valve 29 is arranged on the pipeline; wherein, the steam taking point of the steam cooler 14 in the system is positioned at the steam outlet of the boiler 1 or the hot re-steam outlet of the boiler 1, and the steam taking pipeline of the latter is correspondingly provided with a first regulating valve 20. Sensible heat of the steam is stored in the molten salt through the steam cooler 14, and latent heat of the steam is stored in the condensed water through the steam condenser 18 or the grid water is heated through the grid water heater 19. The condensed water line of the steam condenser 18 leads to an interstage drain of the deaerator 8 or the condenser 5 or the high-pressure heating unit 10 or the low-pressure heating unit 7. The boiler 1 is a device for generating steam, such as a coal-fired boiler, a gas-fired boiler, an oil-fired boiler, a biomass boiler, a waste heat boiler, and an electrode boiler. The low-pressure heating unit 7 adopts a form of connecting a first-stage low-pressure heater or a plurality of stages of low-pressure heaters in series, the pipeline connecting point of the low-pressure heating unit 7 and the steam condenser 18 is positioned at the inlet or the outlet of any low-pressure heater, and water is taken from a single point or a plurality of points, so that the temperature and the flow rate of the taken water can be adjusted; the high-pressure heating unit 10 adopts a form of series connection of a one-stage high-pressure heater or a multi-stage high-pressure heater, the pipeline connecting point of the high-pressure heating unit 10 and the water supply heater 17 is positioned at the inlet or the outlet of any high-pressure heater, and water is taken from a single point or multiple points, so that the water taking temperature and flow can be adjusted.
As shown in fig. 1, the utility model discloses thermal power generating unit takes out steam heat accumulation formula peak regulation system's working process based on fused salt heat-retaining includes:
energy storage working condition: starting the low-temperature molten salt pump 13, opening the first regulating valve 20, the fifth shutoff valve 25, the seventh shutoff valve 30 and the third regulating valve 31, stopping the high-temperature molten salt pump 16, and closing the eighth shutoff valve 28 and the fourth regulating valve 29; if the steam latent heat heats the condensed water, the third shut-off valve 23, the fourth shut-off valve 24, the sixth shut-off valve 26 and the second regulating valve 27 are required to be closed, and the first shut-off valve 21 and the second shut-off valve 22 are required to be opened; if the latent heat of the steam heats the water of the heat supply network, the first shut-off valve 21 and the second shut-off valve 22 are closed, and the third shut-off valve 23, the fourth shut-off valve 24, the sixth shut-off valve 26 and the second regulating valve 27 are opened; if the latent heat of the steam heats the condensed water, when the condensed water of the low-pressure heating unit 7 is completely bypassed, the extracted steam amount reaches the maximum, and the maximum peak regulation capacity of the system is reached; if the latent heat of steam heats the water of the heat supply network, the peak shaving capacity of the unit is increased along with the increase of the water quantity of the heat supply network; under the working condition of energy storage, sensible heat of steam is converted into sensible heat of molten salt and stored in a molten salt heat tank 15, latent heat of the steam is converted into sensible heat of condensate or sensible heat of water in a heat supply network, and under the condition that the evaporation capacity of a boiler is unchanged, the steam is reduced to do work, so that peak shaving of a unit is realized; when the extracted steam source is boiler hot re-steam, the first regulating valve 20 corresponds to the first regulating valve 20, and other working methods are unchanged;
energy release working conditions are as follows: stopping the low-temperature molten salt pump 13, closing the first regulating valve 20, the first shutoff valve 21, the second shutoff valve 22, the third shutoff valve 23, the fourth shutoff valve 24, the fifth shutoff valve 25, the sixth shutoff valve 26, the second regulating valve 27, the seventh shutoff valve 30 and the third regulating valve 31, starting the high-temperature molten salt pump 16, and opening the eighth shutoff valve 28 and the fourth regulating valve 29; the opening of the fourth regulating valve 29 controls the bypass water amount of the high-pressure heating unit 10, thereby controlling the outlet water temperature of the feedwater heater 17. When all the water supply of the high-pressure heating unit 10 is bypassed, the energy release rate reaches the maximum; under the energy release working condition, the sensible heat of the molten salt is converted into the sensible heat of the feed water, and under the condition that the evaporation capacity of a boiler is not changed, the steam extraction of a steam turbine is reduced, the work of steam is increased, and the generating power of a unit is improved;
and other working conditions: and (3) stopping the high-temperature molten salt pump 16 and the low-temperature molten salt pump 13, closing the first regulating valve 20, the first shutoff valve 21, the second shutoff valve 22, the third shutoff valve 23, the fourth shutoff valve 24, the fifth shutoff valve 25, the sixth shutoff valve 26, the second regulating valve 27, the eighth shutoff valve 28, the fourth regulating valve 29, the seventh shutoff valve 30 and the third regulating valve 31, isolating the peak shaving system from the unit, and normally operating the unit.
Can find out from the aforesaid, the utility model discloses can the system utilize fused salt storage steam heat, realize large capacity, high-quality heat-retaining, simultaneously, the utility model discloses the system can realize that the low pressure jar does not exert oneself, and the degree of depth reduces the thermal power generating unit electricity and exerts oneself, promotes the unit flexibility by a wide margin, realizes thermal power generating unit degree of depth peak regulation, has good economic benefits.
Claims (9)
1. A thermal power generating unit steam extraction and heat storage type peak regulation system based on molten salt heat storage is characterized by comprising a boiler (1), a high-pressure cylinder (2), an intermediate pressure cylinder (3), a low-pressure cylinder (4), a condenser (5), a condensate pump (6), a low-pressure heating unit (7), a deaerator (8), a water feed pump (9), a high-pressure heating unit (10), a molten salt cold tank (12), a low-temperature molten salt pump (13), a steam cooler (14), a molten salt hot tank (15), a high-temperature molten salt pump (16), a water feed heater (17), a steam condenser (18) and a heat supply network water heater (19);
the steam outlet of a boiler (1) is communicated with the inlet of a high-pressure cylinder (2) through a pipeline, the outlet of the high-pressure cylinder (2) is communicated with the reheat steam inlet of the boiler (1) through a pipeline, the reheat steam outlet of the boiler (1) is connected with the inlet of an intermediate pressure cylinder (3) through a pipeline, the intermediate pressure cylinder (3), a low-pressure cylinder (4) and a condenser (5) are sequentially connected through pipelines, the condenser (5) is sequentially connected with a condensate pump (6), a low-pressure heating unit (7), a deaerator (8), a water feed pump (9) and a high-pressure heating unit (10) through pipelines, and the outlet of the high-pressure heating unit (10) is connected with the water feed inlet of the boiler (1) through a pipeline;
the molten salt cold tank (12), the low-temperature molten salt pump (13), the molten salt side of the steam cooler (14), the molten salt hot tank (15), the high-temperature molten salt pump (16) and the molten salt side of the feed water heater (17) are sequentially connected through a molten salt pipeline; a water side inlet and a water side outlet of the feed water heater (17) are respectively communicated with an inlet and an outlet of the high-pressure heating unit (10) through pipelines;
a steam side inlet of the steam cooler (14) is connected with the boiler (1) through a pipeline, and a steam side outlet of the steam cooler (14) is respectively communicated with a steam inlet of the steam condenser (18) and a steam inlet of the heat supply network water heater (19) through pipelines; a condensed water outlet of the steam condenser (18) and a condensed water outlet of the heat supply network water heater (19) are converged by a pipeline and then communicated with the deaerator (8); the inlet and the outlet of condensed water of the steam condenser (18) are respectively communicated with the inlet and the outlet of the low-pressure heating unit (7) through pipelines;
the condensation water inlet of the steam condenser (18), the condensation water outlet of the steam condenser (18), the steam inlet of the heat supply network water heater (19), the condensation water outlet of the heat supply network water heater (19), a collecting pipe of the condensation water outlet of the heat supply network water heater (19) and the condensation water outlet of the steam condenser (18), the water side inlet of the water supply heater (17), the water side outlet of the water supply heater (17), the condensation water inlet of the steam condenser (18) and the condensation water outlet of the steam condenser (18) are respectively provided with a first shut-off valve (21), a second shut-off valve (22), a third shut-off valve (23), a fourth shut-off valve (24), a fifth shut-off valve (25), an eighth shut-off valve (28), a fourth regulating valve (29), a seventh shut-off valve (30) and a third regulating valve (31).
2. The fused salt heat storage based thermal power generating unit steam extraction and heat storage type peak regulation system of claim 1, characterized by further comprising a generator (11), wherein a main shaft of the high-pressure cylinder (2), the middle-pressure cylinder (3) and the low-pressure cylinder (4) is connected with the generator (11).
3. The fused salt heat storage-based thermal power generating unit steam extraction and heat storage type peak regulation system is characterized in that a steam side inlet of a steam cooler (14) is connected with a steam outlet of a boiler (1) through a pipeline, and a first regulating valve (20) is arranged on the connecting pipeline.
4. The fused salt heat storage-based thermal power generating unit steam extraction and heat storage type peak regulation system is characterized in that a steam side inlet of a steam cooler (14) is connected with a hot re-steam outlet of a boiler (1) through a pipeline, and a first regulating valve (20) is arranged on the connecting pipeline.
5. The thermal power generating unit steam extraction and heat storage type peak regulation system based on molten salt heat storage is characterized in that a heat supply network water inlet and outlet of a heat supply network water heater (19) are provided with a heat supply network water inlet pipeline and a heat supply network water return pipeline, a six-way shutoff valve (26) is arranged on the water inlet pipeline, and a two-way regulating valve (27) is arranged on the water outlet pipeline.
6. The fused salt heat storage-based thermal power generating unit steam extraction and heat storage type peak regulation system is characterized in that the low-pressure heating unit (7) is in a form of a one-stage low-pressure heater or a multi-stage low-pressure heater connected in series, and a pipeline connecting point of the low-pressure heating unit (7) and the steam condenser (18) is positioned at an inlet or an outlet of any low-pressure heater.
7. The fused salt heat storage-based thermal power generating unit steam extraction heat storage type peak regulation system of claim 6, characterized in that the high-pressure heating unit (10) adopts a structure formed by connecting one-stage high-pressure heaters or multiple stages of high-pressure heaters in series, and a pipeline connection point of the high-pressure heating unit (10) and the feed water heater (17) is positioned at an inlet or an outlet of any high-pressure heater.
8. The fused salt heat storage based thermal power generating unit steam extraction heat storage type peak regulation system of claim 7, characterized in that a condensed water pipeline of a steam condenser (18) is led to an interstage water drainage pipeline of a condenser or a high-pressure heating unit (10) or an interstage water drainage pipeline of a low-pressure heating unit (7).
9. The fused salt heat storage-based thermal power generating unit steam extraction heat storage type peak regulation system of claim 1, which is characterized by comprising a coal-fired boiler, a gas-fired boiler, an oil-fired boiler, a biomass boiler, a waste heat boiler or an electrode boiler.
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