CN216281305U - Boiler system of thermal power station - Google Patents

Abstract

The utility model discloses a boiler system of a thermal power station, and relates to the technical field of thermal power generation. The boiler system of the thermal power station comprises an electric starting boiler unit, a starting boiler water vapor circulation manifold, a first heat exchanger, a heat storage system and a generator unit; the electric starting boiler unit can be used for starting a generator set, the generator set is used for generating electricity, and the generator set is used for supplying power to a power grid system or an auxiliary power system; the electrically started boiler unit is connected with a delivery power grid system or a service power system; the electric starting boiler unit is connected with the first heat exchanger through a starting boiler water vapor circulation manifold, the heat storage system is connected with the first heat exchanger, and the first heat exchanger is used for conducting heat energy generated by the electric starting boiler unit to the heat storage system. The technical problem that the starting boiler utilization ratio is low in the power plant can be solved by the scheme.

Description

Boiler system of thermal power station

Technical Field

The utility model relates to the technical field of thermal power generation, in particular to a boiler system of a thermal power station.

Background

In power generation projects of power plants and power stations, a starting boiler is required to be equipped in first-stage projects, and an auxiliary steam source is provided for steam point operations such as unit cleaning, blowing, deaerator heating and the like through the starting boiler, so that the starting boiler is directly related to safe starting of the unit.

At present, the starting boiler conventionally configured in a thermal power plant in China mainly takes diesel oil, natural gas and coal as fuels. The oil-fired and coal-fired starting boilers are small in capacity, most of the starting boilers are not provided with environment-friendly facilities, and most of the coal-fired and oil-fired starting boilers face the environment-friendly pressure. Which in turn results in partial-area start-up boiler emissions that are already insufficient. Although the electrode boiler is adopted as the starting boiler of the nuclear power plant in the related art, the steam parameter of the auxiliary boiler of the nuclear power plant is usually 1.2MPa level saturated steam, while the steam of the starting boiler of the thermal power plant is usually superheated steam, usually the steam pressure is 1.0MPa to 1.5MPa, and the temperature is about 350 ℃, obviously, the electrode boiler for nuclear power in the related art cannot be directly applied to the thermal power plant.

In addition, the starting boiler of the thermal power plant in China has single purpose, and generally, the starting boiler is not needed to provide a large amount of steam after the thermal power plant is put into operation, so that the utilization rate of the starting boiler is low.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a boiler system of a thermal power station, which aims to solve the technical problem of low utilization rate of a starting boiler in the existing power station.

In order to solve the problems, the utility model adopts the following technical scheme:

a thermal power station boiler system comprises an electric starting boiler unit, a starting boiler water vapor circulation manifold, a first heat exchanger, a heat storage system and a generator unit;

the electric starting boiler unit can be used for starting a generator set, the generator set is used for generating electricity, and the generator set is used for supplying power to a power grid system or an auxiliary power system;

the electrically started boiler unit is connected with a delivery power grid system or a service power system;

the electric starting boiler unit is connected with the first heat exchanger through a starting boiler water vapor circulation manifold, the heat storage system is connected with the first heat exchanger, and the first heat exchanger is used for conducting heat energy generated by the electric starting boiler unit to the heat storage system.

The technical scheme adopted by the utility model can achieve the following beneficial effects:

in the thermal power station boiler system disclosed by the embodiment of the utility model, the electric starting boiler unit is used for replacing the traditional fuel oil starting boiler, so that the whole thermal power plant has no fuel oil, the flammable and combustible hazard source and hidden danger of the thermal power plant are reduced, and the maintenance cost and the occupied area are saved. The electric starting boiler unit is connected with the delivery power grid system or the auxiliary power system, and the power consumption load can be increased by the electric starting boiler unit under the condition that the delivery power grid system requires the power plant to reduce the power generation load. Under the condition that a power grid system is sent out to require a power plant to increase power generation load, the power consumption load can be reduced by electrically starting the boiler unit, and the flexibility of peak regulation of a thermal power plant can be further realized. Under the condition that the power grid has no peak regulation requirement, the frequency modulation function can be realized by increasing or reducing the power of an electrically started boiler unit, and the utilization rate of the electrode boiler is further improved. In addition, the boiler water vapor circulation manifold is started to be connected with the heat storage system through the first heat exchanger, so that heat energy generated by peak shaving or frequency modulation can be stored by the heat storage system, and the stored heat energy can be called as required.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic structural diagram of a thermal power station boiler system disclosed by an embodiment of the utility model;

FIG. 2 is a schematic diagram of a first power supply of a thermal power station boiler system according to an embodiment of the disclosure;

FIG. 3 is a schematic diagram of a second power supply of a thermal power station boiler system according to an embodiment of the disclosure;

in the figure: 100-electrically starting the boiler unit; 110-an electric steam boiler; 120-an electric superheater; 200-starting a boiler water vapor circulation manifold; 300-a first heat exchanger; 400-a thermal storage system; 500-a generator set; 510-a thermal system manifold; 520-a third heat exchanger; 530-a steam turbine group; 540-a generator; 550-a cooling tower; 560-a condenser; 570-a second pumping device; 580-coal-fired boiler; 600-a second heat exchanger; 700-a heat network system; 710-heat network circulation line; 720-heat network heat storage tank; 800-a first pumping device; 900-a factory power system; 910-a first transformer; 920-power supply auxiliary devices; 1000-sending out the power grid system; 1100-a second transformer; 1200-third transformer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to fig. 1 to 3.

Referring to fig. 1 to 3, an embodiment of the present invention discloses a thermal power station boiler system, which is suitable for starting a unit in the technical field of power generation. Of course, the present embodiment does not limit the specific application range of the pot starter set system, and the pot starter set system can be applied to the nuclear power generation technology and the thermal power generation technology.

In the technical field of power generation, a starting boiler is required to be equipped for starting the first generator set 500 in the first stage of engineering, an auxiliary steam source is provided for steam point operation of the generator set by starting the boiler, and the starting boiler is directly related to safe starting of the generator set. In this embodiment, the auxiliary steam source of the plant is the electrically-started boiler plant 100 from this embodiment.

The starting boiler water vapor circulation manifold 200 is a basic structural component for conveying liquid water or gaseous water in the electric starting boiler unit 100 in the thermal power station boiler system, the electric starting boiler unit 100 is connected with the starting boiler water vapor circulation manifold 200, the electric starting boiler unit 100 is used for heating and converting liquid water into saturated steam or superheated steam, and conveying the saturated steam or the superheated steam to the generator set 500 through the starting boiler water vapor circulation manifold 200 so as to ensure that the generator set 500 can be safely started. Illustratively, the start-up boiler steam circulation manifold 200 may be respectively connected to the shaft seal system and the deaerator of the generator set 500, so that the superheated steam generated by the electric start-up boiler unit 100 may be delivered to the shaft seal system and the deaerator to heat the shaft seal system and the deaerator, thereby ensuring that the generator set 500 can be started up safely. Of course, the start-up boiler water vapor circulation manifold 200 may also be connected to other vapor point operation components in the generator set 500, and for this reason, the embodiment of the present application does not limit the vapor point operation components in the generator set 500 connected to the start-up boiler water vapor circulation manifold 200.

Referring to fig. 1, in the present embodiment, a thermal power station boiler system includes an electrically-started boiler unit 100, a started boiler water vapor circulation manifold 200, a first heat exchanger 300, a heat storage system 400, and a generator unit 500. Wherein the electrically-activated boiler bank 100 is used to heat water and generate superheated steam. The electric start-up boiler unit 100 may be used for starting the generator set 500, which means that the superheated steam generated by the electric start-up boiler unit 100 may be used for starting the first generator set 500 in the first stage of the project.

Compared with the traditional fuel oil starting boiler, the electric starting boiler unit 100 can realize that the whole plant of the thermal power plant does not have fuel oil, further reduces the flammable and combustible hazard sources and hidden dangers of the thermal power plant, and saves the maintenance cost and the occupied area. In addition, in the infrastructure phase of the thermal power plant, the first generator set 500 needs to perform operations such as ignition, flushing, pipe blowing, and the like, and needs to be provided with a start-up boiler having a sufficient capacity. After the boiler unit 100 is started by electricity, the boiler unit can be flexibly configured, the number or capacity of the boiler unit 100 started by electricity can be reduced after the generator unit 500 is put into production, equipment in the same area or system can be flexibly called, and the operation and maintenance cost is reduced.

Referring to fig. 2 and 3, after the generator set 500 is started, the generator set 500 is used to generate power, and the generator set 500 may supply power to the grid system 1000 or the service system 900. Further, the electrically started boiler unit 100 is connected to the delivery grid system 1000 or the service system 900, i.e. after the generator unit 500 is started, the delivery grid system 1000 or the service system 900 may be used to supply power to the electrically started boiler unit 100. Specifically, in the case where the delivery grid system 1000 requires the power plant to reduce the power generation load, the power consumption load may be increased by electrically starting the boiler unit 100. When the power grid system 1000 is sent out and the power plant is required to increase the power generation load, the boiler unit 100 can be electrically started to reduce the power consumption load, so that the flexibility of peak shaving of the thermal power plant can be realized. Under the condition that the power grid has no peak regulation requirement, the frequency modulation function can be realized by increasing or reducing the power of the electric starting boiler unit 100, and the utilization rate of the electric starting boiler unit 100 is further improved.

Further, the electrically-started boiler unit 100 is connected to the first heat exchanger 300 through the start-up boiler water vapor circulation manifold 200, the heat storage system 400 is connected to the first heat exchanger 300, and the first heat exchanger 300 is used for conducting the heat energy generated by the electrically-started boiler unit 100 to the heat storage system 400.

Further alternatively, the electrically-started boiler plant 100 in the above embodiment may maintain the operation state to quickly respond to the peak shaving or frequency modulation demand in the case of the peak shaving or frequency modulation demand of the power grid. In addition, the starting boiler water vapor circulation manifold 200 is connected with the heat storage system 400 through the first heat exchanger 300, so that heat generated by the electric starting boiler unit 100 can be stored in the process that the electric starting boiler unit 100 is used for peak shaving or frequency modulation, and further energy can be supplied through the heat storage system 400 under the condition that a power plant or a user needs heat energy. The embodiment can be favorable for improving the peak shaving capacity of a power plant and further improving the thermoelectric decoupling function of the thermoelectric unit on the premise of meeting the heat supply load.

Of course, the above embodiments do not limit the specific type of the first heat exchanger 300, for example, the first heat exchanger 300 may be selected as a steam-water heat exchanger.

In an alternative embodiment, the thermal storage system 400 may be used to heat water to provide thermal energy to a power plant or heat grid system 700. Of course, the heat storage system 400 may also be connected to the generator set 500, and when the generator set 500 needs to be shut down, superheated steam may be generated by using the heat storage system 400, and the superheated steam required for the shutdown may be provided for the generator set 500, so as to ensure that the generator set 500 can be safely shut down. Moreover, in the process that the generator set 500 needs to be started, the heat storage system 400 can be used for providing superheated steam required by the starting of the generator set 500, and therefore the generator set 500 can be started quickly.

Illustratively, the heat storage system 400 may be a solid heat storage device, a phase change heat storage device, a molten salt heat storage device, or the like. For this reason, the embodiments of the present application do not limit the specific type of the thermal storage system 400. For example, the thermal storage system 400 may be used to generate hot water or steam to increase the range of utilization of thermal energy within the thermal storage system 400.

In the thermal power station boiler system, power can be generated by the generator set 500, and electric energy is respectively sent to the power grid system 1000 and the auxiliary power system 900. Based on different power requirements, it is possible to select whether the electrically started boiler unit 100 is connected to the grid system 1000 or the plant power system 900 for power supply. In order to ensure that the power voltage can be adapted, a second transformer 1100 may be provided on the line leading out of the power grid system 1000, and a first transformer 910 may be provided on the line of the service power system 900.

Referring to fig. 2 again, the electrically-started boiler unit 100 is electrically connected to the delivery grid system 1000, and when the delivery grid system 1000 requires the power plant to reduce the power generation load, the power consumption of the electrically-started boiler unit 100 may be increased to balance the power generation load of the power plant and the power consumption load of the delivery grid system 1000, so as to achieve the purpose of peak shaving. Similarly, when the outgoing power grid system 1000 requires the power plant to increase the power generation load, the power consumption of the electric start-up boiler unit 100 may be reduced, so that the power generation load of the power plant and the consumption load of the outgoing power grid system 1000 may be balanced, and the peak shaving purpose may be achieved.

Further, the electricity consumption capacity of the whole electric starting boiler unit 100 can be changed by adjusting the number of the electric steam boilers 110 in the electric starting boiler unit 100, and the peak shaving purpose can be achieved by replacing the electric steam boilers 110 with different energy consumption powers. For example, in the case that the electrically started boiler group 100 is connected to the export power grid system 1000, the export power grid system 1000 and the electrically started boiler group 100 need to be connected through the third transformer 1200 to ensure that the electrically started boiler group 100 can obtain electric energy adapted to the voltage thereof.

Referring again to FIG. 3, the electrically activated boiler unit 100 is electrically connected to the plant system 900, and the frequency of the generator set 500 can be adjusted by increasing or decreasing the load of the plant system 900. For example, when the frequency of the power supplied by the generator set 500 is higher, the load of the boiler unit 100 can be increased through power starting, so that the frequency of the power generated by the generator set 500 can be reduced, and the frequency modulation effect can be achieved. Under the condition that the frequency of the power supplied by the generator set 500 is lower, the load of the boiler set 100 can be started by reducing the electricity, so that the frequency of the power generated by the generator set 500 can be increased, and the frequency modulation effect is achieved.

In a specific using process, the load of the electrically started boiler unit 100 is changed, so that the generating efficiency of the thermal power station boiler system can be directly influenced, and the primary frequency modulation capability of the thermal power station boiler system is further equivalently realized. The auxiliary primary frequency modulation capability of the electrically started boiler unit 100 is combined with the primary frequency modulation capability of the unit system, so that the loss of the primary frequency modulation mechanism of the unit system can be reduced, and the service life of system equipment is further prolonged.

A power supply auxiliary device 920 is usually further provided on the power supply line of the electrically started boiler plant 100 to ensure safe and stable power supply to the electrically started boiler plant 100. The power supply auxiliary device 920 may be, for example, a voltage regulator device or a temperature current device.

In an alternative embodiment, the electrically-activated boiler unit 100 includes an electric steam boiler 110 and an electric superheater 120, the electric steam boiler 110 being configured to heat water and generate saturated steam. The electric steam boiler 110 is connected to the electric superheater 120 through the start-up boiler water vapor circulation manifold 200, and the saturated steam generated by the electric steam boiler 110 enters the electric superheater 120 and is heated by the electric superheater 120 to generate superheated steam. In the related art, the steam generated by the start electrode boiler used in the nuclear power plant is typically saturated steam of a 1.2MPa level, whereas the steam required for the thermal power plant is superheated steam of 1.0MPa to 1.27MPa and a temperature of 320 ℃ to 360 ℃. The saturated steam generated by the electric steam boiler 110 can be further heated by adding the electric superheater 120 to generate superheated steam required for starting the generator set 500 in the thermal power plant.

Referring to fig. 1, a first heat exchanger 300 is connected to a start-up boiler water vapor circulation manifold 200 passing through an electric superheater 120 so that a heat storage system 400 can be used to store heat of superheated steam generated by the electric start-up boiler plant 100. I.e., the heat stored by the thermal storage system 400 may again generate steam. Illustratively, the heat storage system 400 is respectively connected with one or more of a pulverized coal boiler of a power station, a deaerator, a heat supply network heater, a steam-driven water feed pump, a steam turbine shaft seal and a steam turbine cylinder warming, so that the heat stored by the heat storage system 400 can be used for cleaning the boiler, blowing a pipe, heating the deaerator, heating the steam-driven water feed pump, supplying steam to the outside, heating the steam turbine shaft seal and steam in the steam turbine cylinder warming. Therefore, in the above embodiment, the first heat exchanger 300 is connected to the boiler water vapor circulation manifold 200 passing through the electric superheater 120, so that the heat storage system 400 can have a wider utilization range of stored heat.

The present embodiment does not limit the specific configuration of the electric steam boiler 110, for example, the electric steam boiler 110 may be only one electric steam boiler 110 and directly connected to the sending-out power grid system 1000 or the service power system 900. Of course, the number of the electric steam boilers 110 may be plural in the present embodiment. Meanwhile, the plurality of electric steam boilers 110 may be connected to the delivery grid system 1000 or the service system 900, respectively, to supply power to the plurality of electric steam boilers 110 through the delivery grid system 1000 or the service system 900.

As shown in fig. 2 and 3, in a specific embodiment, the number of the electric steam boilers 110 may be three. Of course, the present embodiment does not limit the specific number of the electric steam boilers 110, for example, the number of the electric steam boilers 110 may be two, four, five, or the like.

In an alternative embodiment, the electric steam boilers 110 are connected in parallel by the start-up boiler steam cycle manifold 200, and the electric steam boilers 110 are each connected to the export power grid system 1000 or the service power system 900. In this embodiment, a corresponding number of electric steam boilers 110 may be started according to the demand amount of steam. It is of course also possible to start a corresponding number of electric steam boilers 110 by grid peak shaving or frequency modulation requirements.

There are many types of electric steam boilers 110. Illustratively, the electric steam boiler 110 may be any one of an electrode steam boiler, an electric heating tube steam boiler, and an electromagnetic induction steam boiler. For this reason, the embodiment of the present application does not limit the specific kind of the electric steam boiler 110.

The thermal power station boiler system further comprises a second heat exchanger 600 and a heat supply network system 700, wherein the heat supply network system 700 is used for providing heat energy to the outside. The second heat exchanger 600 is connected to the electric start-up boiler unit 100 and the heat supply network system 700 through the start-up boiler water vapor circulation manifold 200, and the second heat exchanger 600 is used for transferring heat energy generated by the electric start-up boiler unit 100 to the heat supply network system 700. For example, steam generated during a peak or frequency adjustment process may be used to provide heat energy to a user through heat grid system 700 after genset 500 is started. For example, in winter, peak or frequency modulated steam may be used to provide heating in cold regions. Of course, it is also possible to power plants that require thermal energy. Exemplarily, the heat supply network system 700 is located between the electric steam boiler 110 and the electric superheater 120 via the second heat exchanger 600.

Of course, the present embodiment is not limited to the specific type of the second heat exchanger 600, for example, the second heat exchanger 600 may be selected as a steam-water heat exchanger.

In an alternative embodiment, the heat grid system 700 includes a heat grid circulation line 710, and the second heat exchanger 600 is connected to the heat grid circulation line 710, and the second heat exchanger 600 can conduct the steam heat energy in the startup boiler water vapor circulation manifold 200 to the heat grid circulation line 710. After the generator set 500 is started, steam generated by the electrically-started boiler unit 100 in the peak shaving or frequency modulation process can be conveyed to the second heat exchanger 600 through the started boiler water vapor circulation manifold 200, and then heat is conducted to the heat supply network circulation pipeline 710 by the second heat exchanger 600, so that the heat generated in the peak shaving or frequency modulation process can be used for heating a user.

Referring to fig. 1, the heat supply network circulation pipeline 710 is also a heat supply network circulation pipe network, and the heat energy of the steam surplus in the boiler water vapor circulation manifold 200 can exchange heat with the circulating water in the heat supply network circulation pipeline 710 through the second heat exchanger 600 to heat the circulating water. Specifically, the heat supply network circulation line 710 may include a heat supply network water supply line and a heat supply network water return line, and when in circulation use, the circulation water is supplied to the user through the heat supply network water supply line and is returned by the heat supply network water return line to realize circulation.

Meanwhile, in order to improve the heat energy conversion efficiency of the heat grid system 700, in an optional embodiment, the heat grid system 700 further includes a heat grid heat storage tank 720, the heat grid heat storage tank 720 is connected to the heat grid circulation pipeline 710, and the heat energy in the heat grid circulation pipeline 710 is transferred to the heat grid heat storage tank 720 and stored. Of course, the present embodiment is not limited to the specific type of the heat-storage net tank 720, for example, the heat-storage net tank 720 may be selected as a low-pressure heater.

In an optional embodiment, the thermal power station boiler system further comprises a first pumping device 800, the first pumping device 800 is connected to the start-up boiler water vapor circulation manifold 200, and the first pumping device 800 is used for driving water and/or steam circulation in the start-up boiler water vapor circulation manifold 200.

In an alternative embodiment, the power generation unit 500 includes a thermal system manifold 510 and a third heat exchanger 520, the third heat exchanger 520 is coupled to the start-up boiler water vapor cycle manifold 200, the thermal system manifold 510 is coupled to the third heat exchanger 520, and the third heat exchanger 520 is configured to conduct thermal energy generated by the electrically started-up boiler unit 100 to the thermal system manifold 510.

Referring to fig. 1, power generation unit 500 further includes a steam turbine unit 530, a generator 540, a cooling tower 550, a condenser 560, a second pumping device 570, and a coal-fired boiler 580. Illustratively, coal-fired boiler 580 is coupled to steam turbine set 530 via thermal manifold 510 such that steam generated by coal-fired boiler 580 may be used to drive steam turbine set 530, which in turn drives generator 540 to generate electricity using steam turbine set 530. The steam passing through the turbine group 530 enters the condenser 560 and is converted into condensed water using the cooling tower 550. Illustratively, the third heat exchanger 520 may be coupled to the condenser 560 via the thermal system manifold 510, and the third heat exchanger 520 may be utilized to enable the boiler water vapor cycle manifold 200 to exchange heat with the thermal system manifold 510. The water passing through third heat exchanger 520 further enters coal-fired boiler 580 by second pumping device 570. The above embodiment can heat the coal fired boiler 580 feed water by using the heat energy generated by electrically starting the boiler unit 100, and further can expel a part of low-pressure extracted steam, thereby improving the economy of the unit.

Illustratively, the third heat exchanger 520 is in parallel with the first heat exchanger 300. Illustratively, the superheated steam generated by the electric superheater 120 can be controlled to enter the third heat exchanger 520 or the first heat exchanger 300 by controlling the opening and closing of a valve.

In an alternative embodiment, the generator set 500 further comprises a fourth heat exchanger, the fourth heat exchanger is connected to the heat storage system 400, the thermal system manifold 510 is connected to the fourth heat exchanger, and the fourth heat exchanger is used for transferring the thermal energy in the heat storage system 400 to the thermal system manifold 510. For example, the heat storage system 400 may be used to rapidly heat water and generate saturated steam, or the heat storage system 400 may further heat saturated steam to generate superheated steam. Specifically, the heat stored within the heat storage system 400 may be used to safely drive the generator set 500 or to safely shut down the generator set 500. Of course, the heat stored in the heat storage system 400 may also be used to provide thermal energy to the heat grid system 700.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A thermal power station boiler system is characterized by comprising an electric starting boiler unit (100), a starting boiler water vapor circulation manifold (200), a first heat exchanger (300), a heat storage system (400) and a generator unit (500);

the electrically started boiler plant (100) is operable for starting the generator set (500), the generator set (500) is operable for generating electricity, and the generator set (500) is operable for supplying electricity to an outgoing power grid system (1000) or a service power system (900);

the electrically started boiler unit (100) is connected to the export power grid system (1000) or the plant power system (900);

the electric starting boiler unit (100) is connected with the first heat exchanger (300) through the starting boiler water vapor circulation manifold (200), the heat storage system (400) is connected with the first heat exchanger (300), and the first heat exchanger (300) is used for conducting heat energy generated by the electric starting boiler unit (100) to the heat storage system (400).

2. The thermal power plant boiler system according to claim 1, wherein the electrically-started boiler unit (100) comprises an electric steam boiler (110) and an electric superheater (120), the electric steam boiler (110) being configured to heat water and generate saturated steam;

the electric steam boiler (110) is connected with the electric superheater (120) through the starting boiler water vapor circulation manifold (200), and saturated steam generated by the electric steam boiler (110) enters the electric superheater (120) and is heated by the electric superheater (120) to generate superheated steam.

3. A thermal power plant boiler system according to claim 2, wherein the number of the electric steam boilers (110) is plural, the electric steam boilers (110) are connected in parallel through the starting boiler water vapor circulation manifold (200), and the electric steam boilers (110) are connected to a discharge power grid system (1000) or the plant power system (900).

4. A thermal power plant boiler system according to claim 3, wherein the electric steam boiler (110) is any one of an electrode steam boiler, an electric heating pipe steam boiler, and an electromagnetic induction steam boiler.

5. The thermal power station boiler system according to any one of claims 1 to 4, further comprising a second heat exchanger (600) and a heat network system (700),

the heat supply network system (700) is used for providing heat energy to the outside; the second heat exchanger (600) is respectively connected with the electric starting boiler unit (100) and the heat supply network system (700) through the starting boiler water vapor circulation manifold (200), and the second heat exchanger (600) is used for conducting heat energy generated by the electric starting boiler unit (100) to the heat supply network system (700).

6. The thermal power station boiler system according to claim 5, further comprising a first pumping device (800), wherein the first pumping device (800) is connected to the start-up boiler water vapor circulation manifold (200), and the first pumping device (800) is used for driving water and/or steam circulation in the start-up boiler water vapor circulation manifold (200).

7. The thermal power plant boiler system according to claim 5, wherein the thermal network system (700) comprises a thermal network circulation pipeline (710), the second heat exchanger (600) is connected with the thermal network circulation pipeline (710), and the second heat exchanger (600) can conduct the thermal energy in the starting boiler steam circulation manifold (200) to the thermal network circulation pipeline (710).

8. The thermal power plant boiler system according to claim 7, wherein the heat grid system (700) further comprises a heat grid heat storage tank (720), the heat grid heat storage tank (720) is connected to the heat grid circulation line (710), and the thermal energy in the heat grid circulation line (710) is transferred to the heat grid heat storage tank (720) and stored.

9. The thermal power station boiler system according to any one of claims 1 to 4, wherein the power plant unit (500) comprises a thermal system manifold (510) and a third heat exchanger (520), the third heat exchanger (520) is connected with the start-up boiler water vapor circulation manifold (200), the thermal system manifold (510) is connected with the third heat exchanger (520), and the third heat exchanger (520) is used for conducting thermal energy generated by the electrically start-up boiler unit (100) to the thermal system manifold (510).

10. The thermal power station boiler system as claimed in claim 9, wherein the generator set (500) further comprises a fourth heat exchanger, the fourth heat exchanger is connected with the heat storage system (400), the thermal system manifold (510) is connected with the fourth heat exchanger, and the fourth heat exchanger is used for conducting the heat energy in the heat storage system (400) to the thermal system manifold (510).

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