CN216588750U - Solid heat storage coupling thermal power unit system - Google Patents
Solid heat storage coupling thermal power unit system Download PDFInfo
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- CN216588750U CN216588750U CN202220118371.XU CN202220118371U CN216588750U CN 216588750 U CN216588750 U CN 216588750U CN 202220118371 U CN202220118371 U CN 202220118371U CN 216588750 U CN216588750 U CN 216588750U
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Abstract
The utility model belongs to the technical field of thermal power generation, and discloses a solid heat storage coupling thermal power generating unit system which comprises a solid heat storage device, a thermal power subsystem and a thermal power generating unit; the inlet of the solid heat storage device is connected with the water supply outlets of the multi-stage low-pressure heater, the deaerator and the multi-stage high-pressure heater; the outlet of the solid heat reservoir is connected with the steam inlets of the multistage low-pressure heater, the deaerator and the multistage high-pressure heater and the water supply inlets of the multistage low-pressure heater, the deaerator and the multistage high-pressure heater, and the thermal power generating unit comprises a boiler, a turbine high-pressure cylinder, a turbine medium/low-pressure cylinder and a generator. The solid heat storage device exchanges heat with the thermal power generating unit, partial energy can be stored in the solid heat storage device, and heat stored in the solid heat storage device can also be returned to the thermal power generating unit, so that the peak regulation range of the thermal power generating unit is increased, the output of the thermal power generating unit is increased, and the energy utilization efficiency is improved.
Description
Technical Field
The utility model belongs to the technical field of thermal power generation, and relates to a solid heat storage coupling thermal power unit system.
Background
With the access of a large amount of renewable energy sources represented by solar energy and wind energy to a power grid, thermal power generating units will play more new roles of basic load and peak load regulation in a novel future power system, so that the thermal power generating units are required to have good operation flexibility and can greatly adjust loads. However, the peak regulation capability of the existing thermal power generating unit is poor. The actual peak regulation capacity of the straight condensing unit is about 50% of the rated capacity generally, and the peak regulation capacity of the heat supply unit in the heat supply period is only about 20% of the rated capacity, so that the requirement of a future novel power system on the peak regulation flexibility of the thermal power unit cannot be met.
The configuration of energy storage is an effective means for improving the operation flexibility of the thermal power generating unit, however, the water-pumping energy storage mode of an energy storage installation is generally adopted at present, the proportion of the water-pumping energy storage mode is more than 90%, and the proportion of other electrochemical energy storage, thermal energy storage and other energy storage modes is smaller. However, pumped storage is limited by construction geographic positions and construction periods, cannot be copied on a large scale, and is poor in adaptability to the existing thermal power generating units. Therefore, the problem to be solved urgently is to seek a simple, efficient and high-applicability energy storage system matched with the existing thermal power generating unit and improve the peak load regulation range of the unit.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcoming the above-mentioned shortcomings of the prior art and providing a solid heat storage coupled thermal power generating unit system.
In order to achieve the purpose, the utility model adopts the following technical scheme to realize the purpose:
a solid heat storage coupling thermal power generating unit system comprises a solid heat storage device, a thermal power subsystem and a thermal power generating unit; the heating power subsystem comprises a condenser, a multi-stage low-pressure heater, a deaerator and a multi-stage high-pressure heater which are sequentially connected in series according to the flow direction of a working medium; the inlet of the solid heat reservoir is connected with the water supply outlets of the multistage low-pressure heater, the deaerator and the multistage high-pressure heater; the outlet of the solid heat reservoir is connected with the steam inlets of the multistage low-pressure heater, the deaerator and the multistage high-pressure heater and the water supply inlets of the multistage low-pressure heater, the deaerator and the multistage high-pressure heater; the thermal power generating unit comprises a boiler, a steam turbine high-pressure cylinder, a steam turbine medium/low-pressure cylinder and a generator;
the main steam outlet of the boiler is connected with the steam inlet of the high-pressure cylinder of the steam turbine, the steam outlet of the high-pressure cylinder of the steam turbine is connected with the inlet of the reheater of the boiler, the outlet of the reheater of the boiler is connected with the steam inlet of the medium/low-pressure cylinder of the steam turbine, and the high-pressure cylinder of the steam turbine and the medium/low-pressure cylinder of the steam turbine are both connected with the generator and are used for driving the generator to generate electricity together;
The inlet of the condenser is connected with the steam outlet of a steam turbine medium/low pressure cylinder of the thermal power generating unit; the steam inlet of the multi-stage low-pressure heater is connected with the steam outlet of a high-pressure cylinder of a steam turbine of the thermal power generating unit; a steam inlet of the multistage high-pressure heater is connected with a steam exhaust port of a steam turbine medium/low pressure cylinder of the thermal power generating unit, and a water supply outlet of the multistage high-pressure heater is connected with a preheater inlet of a boiler of the thermal power generating unit; a steam outlet of the multi-stage high-pressure heater is connected with an inlet of the condenser; the inlet of the solid heat reservoir is connected with a main steam outlet and a reheat steam outlet of a boiler of the thermal power generating unit, and the outlet of the solid heat reservoir is connected with the inlet of a reheater of the boiler of the thermal power generating unit and a steam inlet of a turbine medium/low pressure cylinder.
Optionally, the solid heat reservoir includes a heat exchange pipe and a solid heat storage medium wrapped outside the heat exchange pipe.
Optionally, the solid heat storage medium is one of refractory brick, ceramic or concrete.
Optionally, regulating valves are arranged on pipelines between the outlet of the solid heat reservoir and steam inlets of the multi-stage low-pressure heater, the deaerator and the multi-stage high-pressure heater, and between the outlet of the solid heat reservoir and feed water inlets of the multi-stage low-pressure heater, the deaerator and the multi-stage high-pressure heater.
Optionally, regulating valves are arranged on pipelines between an inlet of the solid heat reservoir and feed water outlets of the multi-stage low-pressure heater, the deaerator and the multi-stage high-pressure heater.
Optionally, flow meters are arranged on pipelines between the condenser and the multistage low-pressure heater and pipelines between the deaerator and the multistage high-pressure heater.
Optionally, the multistage low-pressure heaters include a plurality of low-pressure feed water heaters connected in series in sequence according to the flow direction of the working medium, and according to the flow direction of the working medium, a feed water inlet of the first stage low-pressure feed water heater is connected with a feed water outlet of the condenser; and the water supply outlet of the last stage of low-pressure water supply heater is connected with the water supply inlet of the deaerator, and the steam inlets of the low-pressure water supply heaters are connected with the steam discharge port of the medium/low pressure cylinder of the steam turbine.
Optionally, the multistage high-pressure heater comprises a plurality of high-pressure feed water heaters which are sequentially connected in series according to the flow direction of the working medium, and according to the flow direction of the working medium, a feed water inlet of the first-stage high-pressure feed water heater is connected with a feed water outlet of the deaerator; and a water supply outlet of the last stage high-pressure water supply heater is connected with a preheater inlet of the boiler and a working medium inlet of the heat release subsystem, and steam inlets of all stages of high-pressure heaters are connected with a steam outlet of a high-pressure cylinder of the steam turbine.
Optionally, a steam inlet of the multistage low-pressure heater is used for connecting a steam exhaust port of a high-pressure cylinder of a steam turbine of the thermal power generating unit; and a steam inlet of the multi-stage high-pressure heater is used for connecting a steam outlet of a steam turbine medium/low pressure cylinder of the thermal power generating unit.
Compared with the prior art, the utility model has the following beneficial effects:
according to the solid heat storage coupled thermal power generating unit system, when the thermal power generating unit needs to reduce load peak regulation, part of steam entering the thermal power generating unit can exchange heat with the solid heat reservoir firstly, and part of energy is stored in the solid heat reservoir, so that load change of the thermal power generating unit is not influenced by the lowest stable combustion load of a boiler, the peak regulation range of the thermal power generating unit is enlarged, and the operation flexibility of the thermal power generating unit is greatly improved; when the thermal power generating unit does not need to reduce load peak regulation, the heat of the solid heat reservoir can be used for heating feed water or steam, the heat stored in the solid heat reservoir is returned to the thermal power generating unit, the output of the thermal power generating unit is increased, the energy utilization efficiency is improved, and the economical efficiency of the thermal power generating unit is increased.
Drawings
Fig. 1 is a schematic structural diagram of a solid heat storage coupled thermal power unit system of the present invention for load reduction and peak load regulation by reducing the output of the thermal power unit;
Fig. 2 is a schematic structural diagram of the solid heat storage coupled thermal power generating unit system for increasing the output of the thermal power generating unit.
Wherein: 1-a boiler; 2-solid heat storage; 3-a high-pressure cylinder of the steam turbine; 4-turbine medium/low pressure cylinder; 51-a first feedwater heater; 52-a second feedwater heater; 53-third feedwater heater; 54-a fourth feedwater heater; 55-fifth water supply heater; 6-a deaerator; 7-a condenser.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The utility model is described in further detail below with reference to the accompanying drawings:
referring to fig. 1 and 2, in an embodiment of the present invention, a solid heat storage coupled thermal power generating unit system is provided, including a solid heat storage 2, a thermal power subsystem, and a thermal power generating unit; the thermodynamic subsystem comprises a condenser 7, a multistage low-pressure heater, a deaerator 6 and a multistage high-pressure heater which are sequentially connected in series according to the flow direction of a working medium; the inlet of the solid heat storage device 2 is connected with the water supply outlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater; the outlet of the solid heat reservoir 2 is connected with the steam inlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater and the water supply inlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater; the thermal power generating unit comprises a boiler 1, a high-pressure cylinder 3 of a steam turbine, a medium/low-pressure cylinder 4 of the steam turbine and a generator.
A main steam outlet of the boiler 1 is connected with a steam inlet of a high-pressure steam turbine cylinder 3, a steam outlet of the high-pressure steam turbine cylinder 3 is connected with a reheater inlet of the boiler 1, a reheater outlet of the boiler 1 is connected with a steam inlet of a medium/low-pressure steam turbine cylinder 4, and the high-pressure steam turbine cylinder 3 and the medium/low-pressure steam turbine cylinder 4 are both connected with a generator and are used for driving the generator to generate electricity together; an inlet of the condenser 7 is connected with a steam exhaust port of a turbine medium/low pressure cylinder 4 of the thermal power generating unit; the steam inlet of the multi-stage low-pressure heater is connected with the steam outlet of a steam turbine high-pressure cylinder 3 of the thermal power generating unit; a steam inlet of the multistage high-pressure heater is connected with a steam exhaust port of a steam turbine middle/low pressure cylinder 4 of the thermal power generating unit, and a water supply outlet of the multistage high-pressure heater is connected with a preheater inlet of a boiler 1 of the thermal power generating unit; a steam outlet of the multistage high-pressure heater is connected with an inlet of a condenser 7; an inlet of the solid heat reservoir 2 is connected with a main steam outlet and a reheat steam outlet of a boiler 1 of the thermal power generating unit, and an outlet of the solid heat reservoir 2 is connected with a reheater inlet of the boiler 1 of the thermal power generating unit and a steam inlet of a steam turbine medium/low pressure cylinder 4.
In one possible embodiment, the solid heat storage device 2 comprises a heat exchange tube and a solid heat storage medium wrapped outside the heat exchange tube, wherein the solid heat storage medium is one of refractory brick, ceramic or concrete.
In a possible implementation manner, regulating valves are arranged on pipelines between the outlet of the solid heat reservoir 2 and the steam inlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater as well as between the water feeding inlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater, and regulating valves are arranged on pipelines between the inlet of the solid heat reservoir 2 and the water feeding outlets of the multi-stage low-pressure heater, the deaerator 6 and the multi-stage high-pressure heater.
In a possible implementation mode, the multistage low-pressure heaters comprise a plurality of low-pressure feed-water heaters which are sequentially connected in series according to the flow direction of a working medium, and according to the flow direction of the working medium, a feed-water inlet of a first stage of low-pressure feed-water heater is connected with a feed-water outlet of the condenser 7; the water supply outlet of the last stage of low-pressure water supply heater is connected with the water supply inlet of the deaerator 6, and the steam inlets of the low-pressure water supply heaters are connected with the steam outlet of the steam turbine medium/low pressure cylinder 4.
Specifically, the multistage low-pressure heater comprises a fifth feedwater heater 55, a fourth feedwater heater 54 and a third feedwater heater 53 which are sequentially connected in series according to the flow direction of the working medium; the feed water outlets of the fifth feed water heater 55, the fourth feed water heater 54 and the third feed water heater 53 are all connected with the inlet of the solid heat reservoir 2; a feed water outlet of the third feed water heater 53 is connected with a feed water inlet of the deaerator 6, and a feed water inlet of the fifth feed water heater 55 is connected with a feed water outlet of the condenser 7; the steam inlets of the fifth feed water heater 55, the fourth feed water heater 54 and the third feed water heater 53 are all used for connecting the steam outlet of the steam turbine middle/low pressure cylinder 4 of the thermal power generating unit.
In a possible implementation mode, the multistage high-pressure heater comprises a plurality of high-pressure feed water heaters which are sequentially connected in series according to the flow direction of a working medium, and according to the flow direction of the working medium, a feed water inlet of a first-stage high-pressure feed water heater is connected with a feed water outlet of the deaerator 6; the water supply outlet of the last stage high-pressure water supply heater is connected with the inlet of the preheater of the boiler 1 and the working medium inlet of the heat release subsystem 23, and the steam inlets of the high-pressure heaters are connected with the steam exhaust port of the high-pressure cylinder 3 of the steam turbine. Specifically, the multistage high-pressure heater comprises a second feed water heater 52 and a first feed water heater 51 which are sequentially connected in series according to the flow direction of a working medium; the feed water outlets of the second feed water heater 52 and the first feed water heater 51 are both connected with the inlet of the solid heat reservoir 2; the feed water inlet of the second feed water heater 52 is connected with the feed water outlet of the deaerator 6; the steam inlets of the second water supply heater 52 and the first water supply heater 51 are both used for connecting the steam exhaust port of the high-pressure cylinder 3 of the steam turbine of the thermal power generating unit; the feed water outlet of the first feed water heater 51 is used for connecting the preheater inlet of the boiler 1 of the thermal power generating unit.
In a possible embodiment, flow meters are arranged on the pipelines between the condenser 7 and the multistage low-pressure heater and the pipelines between the deaerator 6 and the multistage high-pressure heater.
When the solid heat storage coupling thermal power generating unit system is used, the inlet of the condenser 7 is used for being connected with the steam exhaust port of the turbine medium/low pressure cylinder 4 of the thermal power generating unit; the steam inlet of the multi-stage low-pressure heater is used for connecting the steam outlet of a steam turbine high-pressure cylinder 3 of the thermal power generating unit; the steam inlet of the multistage high-pressure heater is used for being connected with the steam exhaust port of a steam turbine middle/low pressure cylinder 4 of the thermal power generating unit, and the water supply outlet of the multistage high-pressure heater is used for being connected with the inlet of a preheater of a boiler 1 of the thermal power generating unit; the steam outlet of the multi-stage high-pressure heater is used for being connected with the inlet of the solid heat reservoir 2 at the inlet of the condenser 7 and is used for being connected with the main steam outlet and the reheat steam outlet of the boiler 1 of the thermal power generating unit, and the outlet of the solid heat reservoir 2 is used for being connected with the reheater inlet of the boiler 1 of the thermal power generating unit and the steam inlet of the turbine medium/low-pressure cylinder 4. Wherein, the water supply outlet of the last stage high-pressure heater in the multi-stage high-pressure heaters of the heating power subsystem is connected with the inlet of the preheater of the boiler 1, and the inlet and the outlet of the solid heat reservoir 2 can be in a steam form or a water form.
The working process and principle of the utility model are as follows:
the first working state: referring to fig. 1 again, when the thermal power generating unit needs load reduction and peak shaving, regulating valves are arranged on pipelines from a main steam outlet and a reheat steam outlet of the boiler 1 to the solid heat reservoir 2, part of steam is led out from the main steam and/or reheat steam outlet of the boiler 1 to enter the solid heat reservoir 2, heat is stored in the solid heat reservoir 2, and the flow rates of the led main steam and the reheat steam are controlled by controlling the opening degree of the regulating valves; regulating valves or control valves are arranged on steam inlet pipelines from a steam outlet of the solid heat reservoir 2 to a reheater inlet of the boiler 1, the steam turbine middle/low pressure cylinder 4, the multistage low pressure heater in the thermal subsystem, the deaerator 6 and the multistage high pressure heater, and the steam leaving the solid heat reservoir 2 is controlled to go to the steam by controlling the on-off of the regulating valves. Partial heat is stored in the solid heat reservoir 2 through heat exchange between the steam and the solid heat reservoir, the amount of the steam entering the thermal power generating unit is reduced, and the purpose of load reduction and peak regulation is achieved.
The second working state: referring to fig. 2 again, when the thermal power generating unit needs load reduction and peak load regulation, regulating valves are arranged on pipelines from the water supply outlets of the multistage low-pressure heater, the deaerator 6 and the multistage high-pressure heater in the thermal power subsystem to the solid heat reservoir 2, part of water is led out from the water supply outlets of the multistage low-pressure heater, the deaerator 6 and the multistage high-pressure heater in the thermal power subsystem to enter the solid heat reservoir 2, the heat of the solid heat reservoir 2 is transferred to a water supply medium, and the led water supply flow is controlled by controlling the opening of the regulating valves; regulating valves or control valves are arranged on the pipelines from the water/steam outlet of the solid heat reservoir 2 to the water supply inlets of the multistage low-pressure heater, the deaerator 6 and the multistage high-pressure heater and the steam inlet of the turbine medium/low-pressure cylinder 4, and the water/steam leaving the solid heat reservoir 2 is controlled to go to the direction by controlling the switches of the regulating valves. Through the heat exchange of the solid heat reservoir 2 for water/steam, part of the heat stored in the solid heat reservoir 2 is returned to the thermal power generating unit, so that the temperature of the water/steam entering the thermal power generating unit is increased, and the purpose of load increase and peak regulation is achieved.
According to the solid heat storage coupled thermal power unit system, by coupling the solid heat storage device, when the thermal power unit needs to reduce load peak regulation, part of steam entering the thermal power unit firstly exchanges heat with the solid heat reservoir 2, and part of energy is stored in the solid heat reservoir 2, so that the load change of the thermal power unit is not influenced by the lowest stable combustion load of the boiler 1, the peak regulation range of the thermal power unit is enlarged, and the operation flexibility of the thermal power unit is greatly improved. When the thermal power generating unit does not need to reduce load peak regulation, the heat of the solid heat reservoir 2 is used for heating feed water or steam, the heat stored in the solid heat reservoir 2 is returned to the thermal power generating unit, the output of the thermal power generating unit is increased, the energy utilization efficiency is improved, and the economical efficiency of the thermal power generating unit is improved.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A solid heat storage coupling thermal power unit system is characterized by comprising a solid heat storage device (2), a thermal power subsystem and a thermal power unit; the heating power subsystem comprises a condenser (7), a multi-stage low-pressure heater, a deaerator (6) and a multi-stage high-pressure heater which are sequentially connected in series according to the flow direction of a working medium; the inlet of the solid heat reservoir (2) is connected with the feed water outlets of the multi-stage low-pressure heater, the deaerator (6) and the multi-stage high-pressure heater; the outlet of the solid heat reservoir (2) is connected with the steam inlets of the multistage low-pressure heater, the deaerator (6) and the multistage high-pressure heater and the water supply inlets of the multistage low-pressure heater, the deaerator (6) and the multistage high-pressure heater; the thermal power generating unit comprises a boiler (1), a steam turbine high-pressure cylinder (3), a steam turbine medium/low-pressure cylinder (4) and a generator;
a main steam outlet of the boiler (1) is connected with a steam inlet of a high-pressure turbine cylinder (3), a steam outlet of the high-pressure turbine cylinder (3) is connected with an inlet of a reheater of the boiler (1), an outlet of the reheater of the boiler (1) is connected with a steam inlet of a medium/low-pressure turbine cylinder (4), and the high-pressure turbine cylinder (3) and the medium/low-pressure turbine cylinder (4) are both connected with a generator and used for jointly driving the generator to generate electricity;
An inlet of the condenser (7) is connected with a steam exhaust port of a steam turbine medium/low pressure cylinder (4) of the thermal power generating unit; the steam inlet of the multi-stage low-pressure heater is connected with the steam outlet of a steam turbine high-pressure cylinder (3) of the thermal power generating unit; a steam inlet of the multistage high-pressure heater is connected with a steam exhaust port of a steam turbine medium/low pressure cylinder (4) of the thermal power generating unit, and a feed water outlet of the multistage high-pressure heater is connected with a preheater inlet of a boiler (1) of the thermal power generating unit; a steam outlet of the multi-stage high-pressure heater is connected with an inlet of a condenser (7); an inlet of the solid heat reservoir (2) is connected with a main steam outlet and a reheat steam outlet of a boiler (1) of the thermal power generating unit, and an outlet of the solid heat reservoir (2) is connected with a reheater inlet of the boiler (1) of the thermal power generating unit and a steam inlet of a steam turbine medium/low pressure cylinder (4).
2. The solid heat storage coupled thermal power unit system according to claim 1, wherein the solid heat reservoir (2) comprises a heat exchange pipe and a solid heat storage medium wrapped outside the heat exchange pipe.
3. The solid heat-storage coupled thermal power unit system of claim 2, wherein the solid heat-storage medium is one of refractory brick, ceramic, or concrete.
4. The solid heat storage coupled thermal power generating unit system as claimed in claim 1, wherein regulating valves are arranged on pipelines between the outlet of the solid heat storage (2) and the steam inlets of the multi-stage low-pressure heater, the deaerator (6) and the multi-stage high-pressure heater as well as the feed water inlets of the multi-stage low-pressure heater, the deaerator (6) and the multi-stage high-pressure heater.
5. The solid heat storage coupled thermal power generating unit system according to claim 1, wherein regulating valves are arranged on pipelines between an inlet of the solid heat storage device (2) and feed water outlets of the multistage low-pressure heater, the deaerator (6) and the multistage high-pressure heater.
6. The solid heat storage coupled thermal power unit system according to claim 1, wherein flow meters are arranged on a pipeline between the condenser (7) and the multistage low-pressure heater and a pipeline between the deaerator (6) and the multistage high-pressure heater.
7. The solid heat storage coupling thermal power unit system as claimed in claim 1, wherein the multistage low pressure heater comprises a plurality of low pressure feed water heaters which are connected in series in sequence according to the flow direction of a working medium, and the feed water inlet of the first stage low pressure feed water heater is connected with the feed water outlet of the condenser (7) according to the flow direction of the working medium; the water supply outlet of the last stage of low-pressure water supply heater is connected with the water supply inlet of the deaerator (6), and the steam inlets of the low-pressure water supply heaters are connected with the steam exhaust port of the steam turbine medium/low pressure cylinder (4).
8. The solid heat storage coupling thermal power generating unit system as claimed in claim 1, wherein the multi-stage high-pressure heater comprises a plurality of high-pressure feed water heaters which are sequentially connected in series according to the flow direction of a working medium, and according to the flow direction of the working medium, a feed water inlet of a first-stage high-pressure feed water heater is connected with a feed water outlet of a deaerator (6); the water supply outlet of the last stage high-pressure water supply heater is connected with the inlet of a preheater of the boiler (1) and the working medium inlet of the heat release subsystem (23), and the steam inlets of the high-pressure heaters of all stages are connected with the steam exhaust port of the high-pressure cylinder (3) of the steam turbine.
9. The solid heat storage coupling thermal power unit system as claimed in claim 1, wherein the steam inlet of the multi-stage low-pressure heater is used for connecting the steam outlet of a high-pressure cylinder (3) of a steam turbine of the thermal power unit; and the steam inlet of the multi-stage high-pressure heater is used for connecting the steam outlet of a steam turbine medium/low pressure cylinder (4) of the thermal power generating unit.
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