CN218820594U

CN218820594U - Cogeneration energy storage peak regulation system based on steam supply, drainage and recycling

Info

Publication number: CN218820594U
Application number: CN202222787808.1U
Authority: CN
Inventors: 寇来来; 刘同策; 滕云旭
Original assignee: Linyi Luhua Municipal Engineering Design Co ltd
Current assignee: Linyi Luhua Municipal Engineering Design Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-04-07
Anticipated expiration: 2032-10-21

Abstract

The utility model discloses a cogeneration energy storage peak shaving system based on supply vapour drainage recycle, it is main including the power plant boiler, the turbine unit, high temperature fused salt storage tank, low temperature fused salt storage tank, steam cooling heat exchanger, steam condensation heat exchanger, fused salt steam over heater, fused salt steam generator, fused salt feedwater heater and hydrophobic storage tank, when the turbine unit is unloaded and is transferred the peak, the hot steam step heating fused salt heat-retaining of utilizing the power plant boiler, reduce the steam flow who gets into the turbine unit, when the turbine unit is unloaded and is transferred the peak, utilize the exothermic production steam of high temperature fused salt to supply vapour externally, increase the steam flow who gets into the turbine unit, the hydrophobic steam that retrieves the user simultaneously and discharges provides feedwater for the fused salt energy storage. The utility model discloses utilize the steam step to heat the fused salt heat-retaining, utilize low temperature hydrophobic to provide the water for the exothermic steam production of fused salt, when satisfying the electric power peak shaving requirement, realized the step utilization of energy storage peak shaving process high-grade energy, practiced thrift water resource and energy, market prospect is wide.

Description

Cogeneration energy storage peak regulation system based on steam supply, drainage and recycling

Technical Field

The utility model belongs to the technical field of the peak shaving is generated in the combined heat and power generation unit, concretely relates to combined heat and power generation energy storage peak shaving system based on supply vapour hydrophobicity recycle is particularly useful for the combined heat and power generation system that industry supplied vapour.

Background

A novel power system taking new energy as a main body is constructed, and due to the characteristics of randomness, volatility and the like of the new energy, the power system faces a series of new challenges in aspects of supply-demand balance, system regulation, stability and the like. In order to realize the load balance of a novel power system, energy storage is an important technical means, particularly a long-time energy storage mode such as molten salt thermal energy storage and the like, and by means of characteristics such as a long period and large capacity, the power generation fluctuation of new energy can be adjusted in a longer time dimension, so that 'peak clipping and valley filling' of a power grid is really realized, and the method is a key development direction in the future.

At the present stage, thermal power generation is an important stable power source participating in power grid peak regulation, the flexibility and the high efficiency of a thermal power generating unit are further improved, and the thermal power generating unit is very important for promoting new energy consumption. However, the cogeneration unit for industrial steam supply is limited by the external steam supply load, so that the cogeneration unit has low power peak shaving capability and cannot meet the peak shaving requirement of the power grid. Aiming at the technical problem that the existing thermal power generating unit utilizes fused salt energy storage to carry out peak regulation and steam supply, when the fused salt energy storage is used for releasing heat to produce steam, the required water supply source is not provided, and effective technical solutions are not provided.

Disclosure of Invention

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable in design, dependable performance, based on the combined heat and power generation energy storage peak shaving system that supplies vapour hydrophobic recycling.

The utility model provides a technical scheme that above-mentioned problem adopted is: the combined heat and power generation energy storage peak regulation system based on recycling of steam and hydrophobic water comprises a power station boiler, a high-pressure steam turbine cylinder, a low-pressure steam turbine cylinder and a first generator, wherein a main steam outlet of the power station boiler is connected with a steam inlet of the high-pressure steam turbine cylinder, a steam outlet of the high-pressure steam turbine cylinder is connected with a cold re-steam inlet of the power station boiler, a hot re-steam outlet of the power station boiler is connected with a steam inlet of the low-pressure steam turbine cylinder, a second valve is arranged at the steam inlet of the low-pressure steam turbine cylinder, the high-pressure steam cylinder and the low-pressure steam turbine cylinder coaxially drive the first generator to do work and generate electricity, and the combined heat and power generation system is characterized by further comprising a low-temperature molten salt storage tank, a high-temperature molten salt storage tank, a low-temperature molten salt pump, a steam condensation heat exchanger, a steam cooling heat exchanger, a back press, a second generator, a high-temperature molten salt pump, a molten salt steam generator, a molten salt feed water heater, a hydrophobic storage tank, a water feed pump, a first steam user, a second steam user, a first hydrophobic circulating pump and a second hydrophobic circulating pump, the molten salt outlet of the low-temperature molten salt storage tank is connected with the molten salt inlet of the steam condensation heat exchanger, the molten salt outlet of the low-temperature molten salt storage tank is provided with a fourth valve and a low-temperature molten salt pump, the molten salt outlet of the steam condensation heat exchanger is connected with the molten salt inlet of the steam cooling heat exchanger, the molten salt outlet of the steam cooling heat exchanger is connected with the molten salt inlet of the high-temperature molten salt storage tank, the molten salt inlet of the high-temperature molten salt storage tank is provided with a fifth valve, the steam inlet of the steam cooling heat exchanger is connected with the hot re-steam outlet of the power station boiler through a hot re-steam branch pipe, the hot re-steam branch pipe is provided with a first valve, and the steam inlet of the steam cooling heat exchanger is provided with a sixth valve, the steam outlet of the steam cooling heat exchanger is respectively connected with the steam inlet of the steam condensing heat exchanger and the steam inlet of the back pressure machine through a first steam branch pipe and a second steam branch pipe, a seventh valve is installed on the first steam branch pipe, a ninth valve is installed on the second steam branch pipe, the back pressure machine drives the second generator to do work and generate electricity, the steam outlet of the back pressure machine is connected with the steam inlet end of the industrial steam supply main pipe, a tenth valve is installed at the steam outlet of the back pressure machine, the industrial steam outlet of the low-pressure and medium-pressure steam turbine cylinders is connected with the steam inlet end of the industrial steam supply main pipe through the industrial steam extraction pipe, a third valve is installed on the industrial steam extraction pipe, the molten salt outlet of the high-temperature molten salt storage tank is connected with the molten salt inlet of the steam superheater, and an eleventh valve and a high-temperature molten salt pump are installed at the molten salt outlet of the high-temperature molten salt storage tank, the molten salt steam superheater comprises a molten salt outlet, a molten salt steam generator, a molten salt water supply heater, a drain tank, a molten salt steam superheater, a molten salt pump, a molten salt steam generator and a molten salt pump, wherein the molten salt outlet of the molten salt steam superheater is connected with the molten salt inlet of the molten salt steam generator, the molten salt outlet of the molten salt steam generator is connected with the molten salt inlet of the molten salt water supply heater, the molten salt outlet of the molten salt steam generator is connected with the steam inlet of the molten salt steam superheater, the molten salt outlet of the molten salt steam superheater is connected with the steam inlet end of the industrial steam supply main pipe, and the steam outlet of the molten salt steam superheater is provided with a fourteen-gauge valve, the steam outlet end of the industrial steam supply main pipe is simultaneously connected with a first steam user and a second steam user, a fifteen-number valve is installed at a steam inlet of the first steam user, a sixteen-number valve is installed at a steam inlet of the second steam user, a drain outlet of the second steam user is connected with a low-temperature water inlet of the water-water heat exchanger through a drain recovery pipe, a seventeen-number valve and a first drain circulating pump are installed at a drain outlet of the second steam user, a high-temperature water inlet of the water-water heat exchanger is connected with a drain outlet of the steam condensation heat exchanger, an eighth-number valve is installed at a drain outlet of the steam condensation heat exchanger, a water outlet of the water-water heat exchanger is connected with a water inlet of a drain storage tank, and a second drain circulating pump is installed at a water inlet of the drain storage tank.

Further, be provided with hydrophobic bypass pipe between water heat exchanger's low temperature water inlet and the delivery port, and install nineteen valves and twenty valves respectively at water heat exchanger's low temperature water inlet and delivery port, install eighteen valves on hydrophobic bypass pipe.

Furthermore, the steam condensing heat exchanger and the steam cooling heat exchanger are connected in series.

Furthermore, the fused salt steam superheater, the fused salt steam generator and the fused salt water supply heater are connected in series.

Furthermore, the water-water heat exchanger is a direct contact heat exchanger.

Compared with the prior art, the utility model, have following advantage and effect: (1) The utility model utilizes the hot re-steam after doing work to heat the fused salt in a cascade way for storing heat, thereby realizing the cascade utilization of high-parameter steam while meeting the demand of electric power peak shaving, reducing the consumption of high-grade heat energy in the process of storing energy and shaving the peak and saving energy; (2) The steam user is drained through recycling the wasted steam, the discontinuity of drainage is solved through the water storage tank, the requirement of water supply quality and water supply flow rate for heat release production of steam by molten salt energy storage is met, the low-temperature steam drainage with certain waste heat is recycled, water resources and waste heat resources are saved, and the wide market application prospect is achieved. The utility model discloses a carry the hydrophobic back of mixing of high temperature steam who produces when carrying out the heat-retaining with the hydrophobic and molten salt energy storage of recoverable low temperature steam among the steam user and store to the water storage tank, then recycle the water storage tank and provide the feedwater for its production steam when the molten salt energy storage is exothermic, both satisfied the molten salt energy storage and carried out the required quality and the water flow of giving water of exothermic production steam, the direct low temperature steam who is discharged by the steam user of recycle is hydrophobic again, water resource and waste heat resource have been practiced thrift, market prospect is wide.

Drawings

Fig. 1 is the embodiment of the utility model provides a schematic diagram of combined heat and power generation energy storage peak shaving system based on supply vapour drainage is recycled.

In the figure: 1-power station boiler, 2-steam turbine high pressure cylinder, 3-steam turbine medium and low pressure cylinder, 4-first generator, 5-low temperature molten salt storage tank, 6-high temperature molten salt storage tank, 7-low temperature molten salt pump, 8-steam condensing heat exchanger, 9-steam cooling heat exchanger, 10-back press, 11-second generator, 12-high temperature molten salt pump, 13-molten salt steam superheater, 14-molten salt steam generator, 15-molten salt water supply heater, 16-hydrophobic storage tank, 17-water supply pump, 18-first steam user, 19-second steam user, 20-first hydrophobic circulating pump, 21-water heat exchanger, 22-second hydrophobic circulating pump, 31-first valve, 32-second valve, 33-third valve, 34-fourth valve, 35-fifth valve, 36-sixth valve, 37-seventh valve, 38-eighth valve, 39-ninth valve, 40-tenth valve, 41-eleventh valve, 42-twelfth valve, 43-thirteenth valve, 44-fourteenth valve, sixteenth valve, 56-seventeenth valve, 55-seventeenth valve, 49-seventeenth steam heat recovery branch pipe, 52-seventeenth steam recovery branch pipe, and steam recovery branch pipe.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples

Referring to fig. 1, the cogeneration energy storage peak shaving system based on recycling of steam and hydrophobic in the embodiment includes a power station boiler 1, a high-pressure steam turbine cylinder 2, a low-pressure steam turbine cylinder 3, a first generator 4, a low-temperature molten salt storage tank 5, a high-temperature molten salt storage tank 6, a low-temperature molten salt pump 7, a steam condensing heat exchanger 8, a steam cooling heat exchanger 9, a back pressure machine 10, a second generator 11, a high-temperature molten salt pump 12, a molten salt steam superheater 13, a molten salt steam generator 14, a molten salt feedwater heater 15, a hydrophobic storage tank 16, a feedwater pump 17, a first steam user 18, a second steam user 19, a first hydrophobic circulation pump 20, a water-water heat exchanger 21 and a second hydrophobic circulation pump 22, wherein a main steam outlet of the power station boiler 1 is connected with a steam inlet of the high-pressure steam turbine cylinder 2, a steam outlet of the high-pressure steam turbine cylinder 2 is connected with a cold re-steam inlet of the power station boiler 1, the hot re-steam outlet of the power station boiler 1 is connected with the steam inlet of the steam turbine low and medium pressure cylinder 3, the steam inlet of the steam turbine low and medium pressure cylinder 3 is provided with a second valve 32, the industrial steam extraction port of the steam turbine low and medium pressure cylinder 3 is connected with the steam inlet end of an industrial steam supply main pipe 55 through an industrial steam extraction pipe 52, the industrial steam extraction pipe 52 is provided with a third valve 33, the steam turbine high pressure cylinder 2 and the steam turbine low and medium pressure cylinder 3 coaxially drive a first generator 4 to do work and generate power, the molten salt outlet of the low temperature molten salt storage tank 5 is connected with the molten salt inlet of the steam condensing heat exchanger 8, the molten salt outlet of the low temperature molten salt storage tank 5 is provided with a fourth valve 34 and a low temperature molten salt pump 7, the molten salt outlet of the steam condensing heat exchanger 8 is connected with the molten salt inlet of the steam cooling heat exchanger 9, the molten salt outlet of the steam cooling heat exchanger 9 is connected with the molten salt inlet of the high temperature molten salt storage tank 6, and the molten salt inlet of the high temperature molten salt storage tank 6 is provided with a fifth valve 35, the steam inlet of the steam cooling heat exchanger 9 is connected with the hot re-steam outlet of the power station boiler 1 through a hot re-steam branch pipe 51, a first valve 31 is installed on the hot re-steam branch pipe 51, a sixth valve 36 is installed on the steam inlet of the steam cooling heat exchanger 9, the steam outlet of the steam cooling heat exchanger 9 is respectively connected with the steam inlet of the steam condensing heat exchanger 8 and the steam inlet of the back pressure machine 10 through a first steam branch pipe 53 and a second steam branch pipe 54, a seventh valve 57 is installed on the first steam branch pipe 53, a ninth valve 39 is installed on the second steam branch pipe 54, the back pressure machine 10 drives the second generator 11 to do work and generate power, the steam outlet of the back pressure machine 10 is connected with the steam inlet of the industrial steam supply main pipe 55, a tenth valve 40 is installed on the steam outlet of the back pressure machine 10, the molten salt outlet of the high-temperature molten salt storage tank 6 is connected with the molten salt inlet of the steam superheater 13, a eleventh valve 41 and a high-temperature molten salt pump 12 are installed on the molten salt outlet of the superheater 13, the molten salt outlet of the steam generator 13 is connected with the molten salt inlet of the molten salt heater 14, the molten salt heater is connected with the water inlet of the molten salt heater 15, the molten salt heater 15 is connected with the water inlet of the molten salt heater 14, the molten salt heater 15 water outlet of the molten salt heater 14, a steam outlet of the molten salt steam superheater 13 is connected with a steam inlet end of an industrial steam supply main pipe 55, a fourteen-numbered valve 44 is installed at the steam outlet of the molten salt steam superheater 13, a steam outlet end of the industrial steam supply main pipe 55 is connected with a first steam user 18 and a second steam user 19 at the same time, a fifteen-numbered valve 45 is installed at a steam inlet of the first steam user 18, a sixteen-numbered valve 46 is installed at a steam inlet of the second steam user 19, a drain outlet of the second steam user 19 is connected with a low-temperature water inlet of the water-water heat exchanger 21 through a drain recovery pipe 56, a seventeen-numbered valve 47 and a first drain circulating pump 20 are installed at a drain outlet of the second steam user 19, a high-temperature water inlet of the water-water heat exchanger 21 is connected with a drain outlet of the steam condensing heat exchanger 8, an eighty-numbered valve 38 is installed at a drain outlet of the steam condensing heat exchanger 8, a water outlet of the water-water heat exchanger 21 is connected with a water inlet of the drain storage tank 16, a second drain circulating pump 22 is installed at a water inlet of the drain storage tank 16, a drain pipe 57 is arranged between a drain outlet of the water-water outlet 21 and a drain pipe low-temperature bypass pipe 57, a low-temperature bypass valve 57 of the water heat exchanger 21 and a nineteen-numbered valve 49, and a drain bypass valve 48 are installed at a drain pipe 57, and a nineteen-numbered bypass pipe 57, and a drain bypass pipe 57, and a nineteen-numbered bypass valve 48 are installed at a drain outlet of the drain heat exchanger 48.

In this embodiment, the steam condensing heat exchanger 8 and the steam cooling heat exchanger 9 are connected in series.

In this embodiment, the molten salt steam superheater 13, the molten salt steam generator 14, and the molten salt feedwater heater 15 are connected in series.

In this embodiment, the water-water heat exchanger 21 is a direct contact heat exchanger, and the high-temperature drain from the steam condensation heat exchanger 8 and the low-temperature drain from the second steam consumer 19 are directly mixed and heat exchanged in the water-repellent heat exchanger 21, and then are conveyed to the water-repellent storage tank 16.

In this embodiment, the steam trap of the first steam consumer 18 is continuously used, and the non-steam trap is recoverable; the steam trap of the second steam user 19 is directly discharged and the steam trap is recovered.

The operation method related to the embodiment is as follows:

when the cogeneration unit participates in power peak shaving and reduces the load of power generation:

only opening and adjusting a first valve 31, a second valve 32, a third valve 33, a fourth valve 34, a fifth valve 35, a sixth valve 36, a seventh valve 37, an eighth valve 38, a ninth valve 39, a tenth valve 40, a fifteenth valve 45, a sixteenth valve 46, a seventeenth valve 47, a nineteen valve 49 and a twentieth valve 50 to reduce the flow of heat re-steam entering the steam turbine set for power generation, conveying the redundant heat re-steam to the steam cooling heat exchanger 9 through the heat re-steam branch pipe 51 for cooling heat exchange, allowing one part of the cooled heat re-steam to enter the steam condensing heat exchanger 8 for condensation heat exchange, and allowing the other part of the cooled heat re-steam to enter the back press 10 to drive a second generator 11 for power generation to replace service power, the low-pressure steam passing through the back press 10 supplies steam for the first steam user 18 and the second steam user 19 through the industrial steam supply main pipe 55, the low-temperature molten salt from the low-temperature molten salt storage tank 5 is heated for the second time into high-temperature molten salt through the steam condensing heat exchanger 8 and the steam cooling heat exchanger 9 in sequence under the drive of the low-temperature molten salt pump 7, and then the high-temperature molten salt is conveyed to the high-temperature molten salt pump 12 for storage, the low-temperature steam drain from the second steam user 19 enters the water-water heat exchanger 21 through the drain recovery pipe 56, and is conveyed to the drain storage tank 16 for storage after being mixed and heat exchanged with the high-temperature steam drain from the steam condensing heat exchanger 8, and at the moment, the industrial steam from the low-pressure steam turbine cylinder 3 supplies steam for the first steam user 18 and the second steam user 19 through the industrial steam extraction pipe 52.

When the cogeneration unit participates in power peak shaving and raises the power generation load:

only opening and adjusting a second valve 32, an eleventh valve 41, a twelfth valve 42, a thirteenth valve 43, a fourteenth valve 44, a fifteenth valve 45, a sixteenth valve 46, a seventeenth valve 47 and an eighteenth valve 48, wherein all high-parameter steam output by the power station boiler 1 enters the steam turbine set to do work for power generation, and no steam generated by the power station boiler 1 is used for supplying steam to the outside, at the moment, high-temperature molten salt from the high-temperature molten salt storage tank 6 sequentially passes through the molten salt steam superheater 13, the molten salt steam generator 14 and the molten salt feedwater heater 15 to be cooled in a three-stage manner and then returns to the low-temperature molten salt storage tank 5, the feedwater from the drain tank 16 is firstly heated in a first stage by the molten salt feedwater heater 15 to form high-temperature feedwater, then enters the molten salt steam generator 14 to be heated in a second stage to form saturated steam, then enters the molten salt steam superheater 13 to be heated in a three-stage to form superheated steam, finally, steam is supplied to the first steam user 18 and the second steam user 19 through the industrial steam supply main pipe 55, and the low-temperature hydrophobic steam from the second steam user 19 directly enters the drain tank through the drain recovery pipe 56 and the drain bypass pipe 57 to be stored in the drain tank 16.

In the operation method of the embodiment, when the cogeneration unit participates in power peak shaving and reduces the power generation load, the exhaust steam of the back pressure machine 10 is preferentially used for supplying steam to the outside, and then the industrial extraction steam of the low pressure cylinder 3 in the steam turbine is selected for supplying steam to the outside.

Those not described in detail in this specification are well within the skill of the art.

Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.

Claims

1. The utility model provides a cogeneration energy storage peak regulation system based on supply vapour and hydrophobic recycle, includes power boiler (1), steam turbine high pressure cylinder (2), steam turbine low pressure cylinder (3) and first generator (4), the main steam outlet of power boiler (1) is connected with the steam inlet of steam turbine high pressure cylinder (2), the steam exhaust mouth of steam turbine high pressure cylinder (2) is connected with the cold inlet of power boiler (1) again, the hot outlet of steam again of power boiler (1) is connected with the steam inlet of steam turbine low pressure cylinder (3), and installs No. two valves (32) at the steam inlet of steam turbine low pressure cylinder (3), steam turbine high pressure cylinder (2) with the coaxial drive first generator (4) of steam turbine low pressure cylinder (3) do work and generate electricity, its characterized in that still includes low temperature fused salt storage tank (5), high temperature fused salt storage tank (6), low temperature fused salt pump (7), steam condensate heat exchanger (8), steam cooling heat exchanger (9), backpressure machine (10), second generator (11), high temperature fused salt pump (12), fused salt heater (13), fused salt heater (15), steam feed water heater (17), steam condensate pump (17), steam turbine low pressure cylinder (17), steam boiler (17) and steam turbine low pressure cylinder (17) are used for steam boiler (17) and steam boiler (17) are used for the user, A water-water heat exchanger (21) and a second hydrophobic circulating pump (22), a molten salt outlet of the low-temperature molten salt storage tank (5) is connected with a molten salt inlet of the steam condensation heat exchanger (8), a fourth valve (34) and a low-temperature molten salt pump (7) are installed at the molten salt outlet of the low-temperature molten salt storage tank (5), the molten salt outlet of the steam condensation heat exchanger (8) is connected with a molten salt inlet of the steam cooling heat exchanger (9), the molten salt outlet of the steam cooling heat exchanger (9) is connected with a molten salt inlet of the high-temperature molten salt storage tank (6), a fifth valve (35) is installed at a molten salt inlet of the high-temperature molten salt storage tank (6), a steam inlet of the steam cooling heat exchanger (9) is connected with a hot re-steam outlet of the power station boiler (1) through a hot re-steam branch pipe (51), a first valve (31) is installed at the hot re-steam branch pipe (51), a sixth valve (36) is installed at a steam inlet of the steam cooling heat exchanger (9), a steam outlet of the steam cooling heat exchanger (9) is connected with a steam inlet (37) of the steam condensation heat exchanger (8) through a first steam branch pipe (53) and a second steam branch pipe (54), and a ninth valve (39) is installed at a steam inlet of the steam condensation heat exchanger (37), the back press (10) drives the second generator (11) to do work and generate electricity, a steam outlet of the back press (10) is connected with a steam inlet end of an industrial steam supply main pipe (55), a ten-degree valve (40) is installed at the steam outlet of the back press (10), an industrial steam extraction port of a low-pressure cylinder (3) in the steam turbine is connected with a steam inlet end of the industrial steam supply main pipe (55) through an industrial steam extraction pipe (52), a three-degree valve (33) is installed on the industrial steam extraction pipe (52), a molten salt outlet of a high-temperature molten salt storage tank (6) is connected with a molten salt inlet of a molten salt steam superheater (13), an eleventh-degree valve (41) and a high-temperature molten salt pump (12) are installed at a molten salt outlet of a high-temperature molten salt storage tank (6), a molten salt outlet of the molten salt steam superheater (13) is connected with a molten salt inlet of a molten salt steam generator (14), a molten salt outlet of the molten salt steam generator (14) is connected with an inlet of a water supply heater (15), a molten salt outlet of the molten salt steam generator (15) is connected with a molten salt inlet of a low-temperature molten salt heater (5), a molten salt heater (5) is connected with a molten salt inlet of a drain water supply heater (16) and a drain water outlet of molten salt heater (16) and a drain water supply heater (16) are installed at molten salt heater (17, and a drain water inlet of molten salt heater (17), the water outlet of the molten salt feed water heater (15) is connected with the water inlet of the molten salt steam generator (14), the steam outlet of the molten salt steam generator (14) is connected with the steam inlet of the molten salt steam superheater (13), the steam outlet of the molten salt steam superheater (13) is connected with the steam inlet end of an industrial steam supply main pipe (55), a fourteen-number valve (44) is arranged at the steam outlet of the fused salt steam superheater (13), the steam outlet end of the industrial steam supply main pipe (55) is simultaneously connected with a first steam user (18) and a second steam user (19), and a fifteen-valve (45) is arranged at the steam inlet of the first steam user (18), a sixteen-number valve (46) is arranged at the steam inlet of the second steam user (19), the hydrophobic outlet of the second steam user (19) is connected with the low-temperature water inlet of the water-water heat exchanger (21) through a hydrophobic recovery pipe (56), and a seventeen valve (47) and a first drain circulating pump (20) are arranged at a drain outlet of the second steam user (19), a high-temperature water inlet of the water-water heat exchanger (21) is connected with a drainage outlet of the steam condensation heat exchanger (8), and an eight-number valve (38) is arranged at the drainage outlet of the steam condensation heat exchanger (8), the water outlet of the water-water heat exchanger (21) is connected with the water inlet of the hydrophobic storage tank (16), and a second drainage circulating pump (22) is arranged at the water inlet of the drainage storage tank (16).

2. The cogeneration energy-storage peak-shaving system based on recycling of steam and water according to claim 1, wherein a water drainage bypass pipe (57) is arranged between the low-temperature water inlet and the water outlet of the water-water heat exchanger (21), a nineteen valve (49) and a twenty valve (50) are respectively arranged at the low-temperature water inlet and the water outlet of the water-water heat exchanger (21), and an eighteen valve (48) is arranged on the water drainage bypass pipe (57).

3. The cogeneration energy storage and peak shaving system based on steam-water recycling according to claim 1, wherein the steam condensing heat exchanger (8) and the steam cooling heat exchanger (9) are connected in series.

4. The cogeneration energy storage and peak shaving system based on steam and water recycling according to claim 1, wherein the molten salt steam superheater (13), the molten salt steam generator (14) and the molten salt feedwater heater (15) are connected in series.

5. The cogeneration energy storage peak shaving system based on steam-water recycling according to claim 1, wherein the water-water heat exchanger (21) is a direct contact heat exchanger.