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

Abstract

The utility model discloses a heat and power cogeneration energy storage peak-shaving system based on steam supply and drainage reuse, which mainly includes a power station boiler, a steam turbine unit, a high-temperature molten salt storage tank, a low-temperature molten salt storage tank, a steam cooling heat exchanger, a steam Condensing heat exchanger, molten salt steam superheater, molten salt steam generator, molten salt feed water heater, and drain storage tank. When the steam turbine unit reduces load and peaks, the hot resteam of the power plant boiler is used to heat the molten salt in cascade heat storage. Reduce the steam flow into the steam turbine unit. When the steam turbine unit increases its load and adjusts its peak, use high-temperature molten salt to release heat to produce steam for external steam supply, increase the steam flow into the steam turbine unit, and at the same time recover the steam drained by users to provide molten salt energy storage. give water. The utility model uses steam cascade heating of molten salt to store heat, and utilizes low-temperature drainage to provide water supply for the molten salt to release heat and produce steam. When meeting the requirements of power peak regulation, it realizes the cascade utilization of high-grade energy in the energy storage peak regulation process, saving water. Resources and energy have broad market prospects.

Description

Combined heat and power generation energy storage peak shaving system based on steam supply and drainage reuse

technical field

The utility model belongs to the technical field of power generation peak regulation of cogeneration units, and specifically relates to a cogeneration energy storage peak regulation system based on steam supply drainage reuse, and is especially suitable for cogeneration systems of industrial steam supply.

Background technique

The construction of a new power system with new energy as the main body is subject to the randomness and volatility of new energy, which makes the power system face a series of new challenges in terms of supply and demand balance, system regulation, and stability characteristics. In order to achieve the load balance of the new power system, energy storage will be an important technical means, especially long-term energy storage methods such as molten salt thermal energy storage. Regulating the fluctuation of new energy power generation and truly realizing the "peak-shaving and valley-filling" of the power grid are the key development directions in the future.

At this stage, thermal power generation is an important and stable power source that participates in power grid peak regulation. Further improving the flexibility and efficiency of thermal power units is crucial to promoting the consumption of new energy. However, for the combined heat and power units used for industrial steam supply, they are limited by the external steam supply load, resulting in low power peak-shaving capabilities of the co-generation units, which cannot meet the peak-shaving requirements of the power grid. For the existing technology of thermal power units using molten salt energy storage for peak regulation and steam supply, no effective technical solutions have been proposed for the source of water supply required when molten salt energy storage releases heat to produce steam.

Contents of the invention

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a cogeneration energy storage and peak-shaving system with reasonable design, reliable performance, and reuse of steam supply and drainage.

The technical scheme adopted by the utility model to solve the above-mentioned problems is: a cogeneration energy storage peak-shaving system based on steam supply and drainage reuse, including a power station boiler, a steam turbine high-pressure cylinder, a steam turbine medium-low pressure cylinder and a first generator. The main steam outlet of the boiler is connected to 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 to the cold resteam inlet of the utility boiler, and the hot resteam outlet of the utility boiler is connected to the inlet of the low-pressure cylinder of the steam turbine. The steam port is connected, and a No. 2 valve is installed at the steam inlet of the middle and low pressure cylinder of the steam turbine. The high pressure cylinder of the steam turbine and the middle and low pressure cylinder of the steam turbine coaxially drive the first generator to generate power. It is characterized in that it also includes a low temperature melting Salt storage tank, high temperature molten salt storage tank, low temperature molten salt pump, steam condensing heat exchanger, steam cooling heat exchanger, back pressure machine, second generator, high temperature molten salt pump, molten salt steam superheater, molten salt steam Generator, molten salt feed water heater, drain storage tank, feed water pump, first steam user, second steam user, first drain circulation pump, water-to-water heat exchanger and second drain circulation pump, the low temperature molten salt storage The molten salt outlet of the tank is connected to the molten salt inlet of the steam condensing heat exchanger, and a No. 4 valve and a low-temperature molten salt pump are installed at the molten salt outlet of the low-temperature molten salt storage tank, and the molten salt outlet of the steam condensing heat exchanger It is connected to the molten salt inlet of the steam cooling heat exchanger, and the molten salt outlet of the steam cooling heat exchanger is connected to the molten salt inlet of the high temperature molten salt storage tank, and the molten salt inlet of the high temperature molten salt storage tank is installed with a No. 5 Valve, the steam inlet of the steam cooling heat exchanger is connected with the hot resteam outlet of the utility boiler through the hot resteam branch pipe, and a No. 1 valve is installed on the hot resteam branch pipe, and a valve is installed on the steam inlet of the steam cooling heat exchanger No. 6 valve, the steam outlet of the steam cooling heat exchanger is connected to the steam inlet of the steam condensing heat exchanger and the steam inlet of the back pressure machine respectively through the first steam branch pipe and the second steam branch pipe, and the first steam branch pipe The No. 7 valve is installed on the second steam branch pipe, and the No. 9 valve is installed on the second steam branch pipe. The back pressure machine drives the second generator to generate power. connected, and a No. 10 valve is installed at the exhaust port of the back pressure machine, the industrial steam extraction port of the middle and low pressure cylinder of the steam turbine is connected with the steam inlet end of the industrial steam supply main pipe through the industrial steam extraction pipe, and the industrial steam extraction No. 3 valve is installed on the pipe, and the molten salt outlet of the high-temperature molten salt storage tank is connected with the molten salt inlet of the molten salt steam superheater, and a No. 11 valve and a high-temperature melting salt pump, the molten salt outlet of the molten salt steam superheater is connected to the molten salt inlet of the molten salt steam generator, and the molten salt outlet of the molten salt steam generator is connected to the molten salt inlet of the molten salt feedwater heater, so The molten salt outlet of the molten salt feedwater heater is connected to the molten salt inlet of the low-temperature molten salt storage tank, and a No. 12 valve is installed at the molten salt inlet of the low-temperature molten salt storage tank, and the water outlet of the hydrophobic storage tank is connected to the molten salt inlet of the low-temperature molten salt storage tank. The water inlet of the salt feed water heater is connected, and a No. 13 valve and a feed water pump are installed at the water outlet of the hydrophobic storage tank. The water outlet of the molten salt feed water heater is connected with the water inlet of the molten salt steam generator. The steam outlet of the molten salt steam generator is connected to the steam inlet of the molten salt steam superheater, the steam outlet of the molten salt steam superheater is connected to the steam inlet end of the industrial steam supply main pipe, and the steam of the molten salt steam superheater The outlet is equipped with a No. 14 valve, and the steam outlet of the industrial steam supply main pipe is connected to the first steam user and the second steam user at the same time, and a No. 15 valve is installed at the steam inlet of the first steam user. The steam inlet of the second steam user is equipped with a No. 16 valve, and the drain outlet of the second steam user is connected to the low-temperature water inlet of the water-water heat exchanger through a drain recovery pipe, and is installed at the drain outlet of the second steam user. There is a No. 17 valve and a first drain circulation pump. The high-temperature water inlet of the water-water heat exchanger is connected to the drain outlet of the steam condensing heat exchanger, and a No. 8 valve is installed at the drain outlet of the steam condensing heat exchanger. The water outlet of the water-water heat exchanger is connected to the water inlet of the hydrophobic storage tank, and a second hydrophobic circulation pump is installed at the water inlet of the hydrophobic storage tank.

Further, a hydrophobic bypass pipe is provided between the low-temperature water inlet and the water outlet of the water-to-water heat exchanger described in the present invention, and No. 19 valves are respectively installed on the low-temperature water inlet and water outlet of the water-to-water heat exchanger With the No. 20 valve, the No. 18 valve is installed on the drain bypass pipe.

Further, the steam condensing heat exchanger and the steam cooling heat exchanger described in the utility model are connected in series.

Further, the molten salt steam superheater, the molten salt steam generator and the molten salt feedwater heater described in the utility model are connected in series.

Further, the water-to-water heat exchanger described in the utility model is a direct contact heat exchanger.

Compared with the prior art, the utility model has the following advantages and effects: (1) The utility model utilizes the hot steam after work to heat the molten salt in cascades to store energy for heat storage. The cascaded utilization of high-parameter steam reduces the consumption of high-grade heat energy in the process of energy storage and peak regulation, and saves energy; (2) Drainage of steam that is wasted by steam users is recycled, and the discontinuity of drainage is solved through the water storage tank It satisfies the quality and flow rate of the feedwater required for the molten salt energy storage to release heat to produce steam, and recycles and utilizes the low-temperature steam with a certain amount of waste heat to drain water, saving water resources and waste heat resources, and has broad market application prospects. The utility model mixes the recyclable low-temperature steam from the steam user with the high-temperature steam produced during the heat storage of molten salt, and then transports it to the water storage tank for storage, and then reuses the stored energy when the molten salt releases heat. The water tank provides feed water for steam production, which not only meets the feed water quality and feed water flow required for molten salt energy storage to release heat to produce steam, but also recycles and utilizes the low-temperature steam drained directly by steam users, saving water resources With waste heat resources, the market prospect is broad.

Description of drawings

Fig. 1 is a schematic diagram of a combined heat and power storage peak-shaving system based on steam supply and drain reuse in an embodiment of the present invention.

In the figure: 1-power station boiler, 2-high pressure cylinder of steam turbine, 3-medium and low pressure cylinder of steam turbine, 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 pressure machine, 11-Second generator, 12-High temperature molten salt pump, 13-Molten salt steam superheater, 14-Molten salt steam Generator, 15-molten salt feed water heater, 16-drain storage tank, 17-feed water pump, 18-first steam user, 19-second steam user, 20-first hydrophobic circulation pump, 21-water-water heat exchange Device, 22-Second Drainage Circulation Pump, 31-No.1 Valve, 32-No.2 Valve, 33-No.3 Valve, 34-No.4 Valve, 35-No.5 Valve, 36-No.6 Valve, 37-No.7 Valve, 38-No. 8 valve, 39-No. 9 valve, 40-No. 10 valve, 41-No. 11 valve, 42-No. 12 valve, 43-No. 13 valve, 44-No. 14 valve, 45- No. 15 valve, 46-No. 16 valve, 47-No. 17 valve, 48-No. 18 valve, 49-No. 19 valve, 50-No. 20 valve, 51-hot steam branch pipe, 52-industrial Steam extraction pipe, 53-first steam branch pipe, 54-second steam branch pipe, 55-industrial steam supply main pipe, 56-hydrophobic recovery pipe, 57-hydrophobic bypass pipe.

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the utility model and the utility model is not limited to the following examples.

Example

Referring to Fig. 1, the cogeneration energy storage peak shaving system based on steam supply and drainage reuse in this embodiment includes a power plant boiler 1, a steam turbine high-pressure cylinder 2, a steam turbine medium-low pressure cylinder 3, a first generator 4, and a low-temperature molten salt storage tank 5. High temperature molten salt storage tank 6, low temperature molten salt pump 7, steam condensing heat exchanger 8, steam cooling heat exchanger 9, back pressure machine 10, second generator 11, high temperature molten salt pump 12, molten salt steam overheating 13, molten salt steam generator 14, molten salt feed water heater 15, hydrophobic storage tank 16, feed water pump 17, first steam user 18, second steam user 19, first hydrophobic circulation pump 20, water-to-water heat exchanger 21 and the second hydrophobic circulation pump 22, the main steam outlet of the utility boiler 1 is connected to the steam inlet of the steam turbine high-pressure cylinder 2, the exhaust port of the steam turbine high-pressure cylinder 2 is connected to the cold re-steam inlet of the utility boiler 1, and the steam outlet of the utility boiler 1 The hot resteam outlet is connected to the steam inlet of the middle and low pressure cylinder 3 of the steam turbine, and the second valve 32 is installed on the steam inlet of the middle and low pressure cylinder 3 of the steam turbine, and the industrial steam extraction port of the middle and low pressure cylinder 3 of the steam turbine passes through the industrial steam extraction pipe 52 It is connected to the steam inlet end of the industrial steam supply main pipe 55, and the No. 3 valve 33 is installed on the industrial steam extraction pipe 52. The high pressure cylinder 2 of the steam turbine and the medium and low pressure cylinder 3 of the steam turbine coaxially drive the first generator 4 to generate power, and the low temperature melting The molten salt outlet of the salt storage tank 5 is connected to the molten salt inlet of the steam condensing heat exchanger 8, and a No. 4 valve 34 and a low-temperature molten salt pump 7 are installed on the molten salt outlet of the low-temperature molten salt storage tank 5, and the steam condenses heat exchange The molten salt outlet of the device 8 is connected to the molten salt inlet of the steam cooling heat exchanger 9, and the molten salt outlet of the steam cooling heat exchanger 9 is connected to the molten salt inlet of the high temperature molten salt storage tank 6, and in the high temperature molten salt storage tank 6 A No. 5 valve 35 is installed at the molten salt inlet, and the steam inlet of the steam cooling heat exchanger 9 is connected to the hot re-steam outlet of the utility boiler 1 through a hot re-steam branch pipe 51, and a No. 1 valve 31 is installed on the hot-re-steam branch pipe 51 No. 6 valve 36 is installed at the steam inlet of the steam cooling heat exchanger 9, and the steam outlet of the steam cooling heat exchanger 9 is connected with the steam inlet of the steam condensing heat exchanger 8 through the first steam branch pipe 53 and the second steam branch pipe 54 respectively. It is connected to the steam inlet of the back pressure machine 10, and the No. 7 valve 57 is installed on the first steam branch pipe 53, and the No. 9 valve 39 is installed on the second steam branch pipe 54. The back pressure machine 10 drives the second generator 11 to perform work For power generation, the steam exhaust port of the back pressure machine 10 is connected to the steam inlet end of the industrial steam supply main pipe 55, and a No. 10 valve 40 is installed on the steam exhaust port of the back pressure machine 10, and the molten salt outlet of the high temperature molten salt storage tank 6 It is connected with the molten salt inlet of molten salt steam superheater 13, and No. 11 valve 41 and high temperature molten salt pump 12 are installed at the molten salt outlet of high temperature molten salt storage tank 6, and the molten salt outlet of molten salt steam superheater 13 is connected with The molten salt inlet of the molten salt steam generator 14 is connected, the molten salt outlet of the molten salt steam generator 14 is connected with the molten salt inlet of the molten salt feed water heater 15, and the molten salt outlet of the molten salt feed water heater 15 is connected with the low temperature molten salt storage The molten salt inlet of tank 5 is connected, and No. 12 valve 42 is installed at the molten salt inlet of low-temperature molten salt storage tank 5, and the water outlet of drain storage tank 16 is connected with the water inlet of molten salt feedwater heater 15, and the drain The water outlet of storage tank 16 is equipped with No. 13 valve 43 and feed water pump 17, the water outlet of molten salt feed water heater 15 is connected with the water inlet of molten salt steam generator 14, and the steam outlet of molten salt steam generator 14 is connected with molten salt steam generator 14. The steam inlet of the salt steam superheater 13 is connected, the steam outlet of the molten salt steam superheater 13 is connected with the steam inlet end of the industrial steam supply main pipe 55, and a No. 14 valve 44 is installed at the steam outlet of the molten salt steam superheater 13 , the steam outlet end of the industrial steam supply main pipe 55 is connected with the first steam user 18 and the second steam user 19 at the same time, and a No. 15 valve 45 is installed at the steam inlet of the first steam user 18, and at the second steam user No. 16 valve 46 is installed at the steam inlet of 19, and the drain outlet of the second steam user 19 is connected with the low-temperature water inlet of the water-water heat exchanger 21 through the drain recovery pipe 56, and installed at the drain outlet of the second steam user 19 No. 17 valve 47 and the first drain circulation pump 20 are arranged, and the high-temperature water inlet of the water-water heat exchanger 21 is connected with the drain outlet of the steam condensation heat exchanger 8, and eight traps are installed at the drain outlet of the steam condensation heat exchanger 8. No. valve 38, the water outlet of the water-water heat exchanger 21 is connected to the water inlet of the hydrophobic storage tank 16, and a second hydrophobic circulation pump 22 is installed at the water inlet of the hydrophobic storage tank 16, and the low-temperature inlet of the water-water heat exchanger 21 A drain bypass pipe 57 is arranged between the water inlet and the water outlet, and No. 19 valve 49 and No. 20 valve 50 are respectively installed at the low-temperature water inlet and water outlet of the water-to-water heat exchanger 21, and the drain bypass pipe 57 No. 18 valves 48 are installed on it.

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-to-water heat exchanger 21 is a direct contact heat exchanger, and the high-temperature drainage from the steam condensation heat exchanger 8 and the low-temperature drainage from the second steam user 19 are directly mixed and exchanged in the drainage heat exchanger 21. After heating, it is transported to the hydrophobic storage tank 16.

In this embodiment, the steam drain of the first steam user 18 is continued to be used, and no steam drain can be recovered; the steam drain of the second steam user 19 is directly discharged, and the steam drain can be recovered.

The operating method involved in this embodiment is as follows:

When cogeneration units participate in power peak regulation and reduce power generation load:

Only open and adjust No. 1 valve 31, No. 2 valve 32, No. 3 valve 33, No. 4 valve 34, No. 5 valve 35, No. 6 valve 36, No. 7 valve 37, No. 8 valve 38, No. No. 40 valve, No. 15 valve 45, No. 16 valve 46, No. 17 valve 47, No. 19 valve 49 and No. 20 valve 50 reduce the flow of heat and steam entering the steam turbine unit for power generation, and convert the excess heat The resteam is transported to the steam cooling heat exchanger 9 through the hot resteam branch pipe 51 for cooling and heat exchange. Part of the cooled hot resteam enters the steam condensation heat exchanger 8 for condensation and heat exchange, and the other part enters the back press 10 to drive the second The generator 11 generates power to replace the factory electricity, and the low-pressure steam after the back pressure machine 10 supplies steam to the first steam user 18 and the second steam user 19 through the industrial steam supply main pipe 55, and the steam from the low-temperature molten salt storage tank 5 Driven by the low-temperature molten salt pump 7, the low-temperature molten salt is heated twice through the steam condensing heat exchanger 8 and the steam cooling heat exchanger 9 to become high-temperature molten salt, and then sent 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 after mixing and exchanging heat with the high-temperature steam drain from the steam condensation heat exchanger 8, it is then transported to the drain storage tank 16 for storage. At this time, the industrial extraction steam from the middle and low pressure cylinder 3 of the steam turbine supplies supplementary steam to the first steam user 18 and the second steam user 19 through the industrial extraction pipe 52 .

When the combined heat and power unit participates in power peak regulation and increases the power generation load:

Only open and adjust No. 2 valve 32, No. 11 valve 41, No. 12 valve 42, No. 13 valve 43, No. 14 valve 44, No. 15 valve 45, No. 16 valve 46, No. 17 valve 47 And No. 18 valve 48, the high-parameter steam output by the power plant boiler 1 all enters the steam turbine unit to generate power, and the steam generated by the power plant boiler 1 is no longer used for external steam supply. At this time, the high-temperature molten salt from the high-temperature molten salt storage tank 6 After passing through the molten salt steam superheater 13, molten salt steam generator 14 and molten salt feedwater heater 15, the temperature is lowered in three stages and then returned to the low temperature molten salt storage tank 5. The feedwater from the hydrophobic storage tank 16 first passes through the molten salt feedwater heater 15 is heated by the first stage to form high-temperature feed water, and then enters the molten salt steam generator 14 to be heated by the second stage to form saturated steam, then enters the molten salt steam superheater 13 to be heated by the third stage to form superheated steam, and finally passes through the industrial steam supply mother The pipe 55 supplies steam to the first steam user 18 and the second steam user 19, and the low-temperature steam drain from the second steam user 19 directly enters the drain storage tank 16 through the drain recovery pipe 56 and the drain bypass pipe 57 for storage.

In the operation method of this embodiment, when the cogeneration unit participates in power peak regulation and reduces the power generation load, the exhaust steam of the back pressure machine 10 is preferentially used for external steam supply, and secondly, the industrial extraction steam of the middle and low pressure cylinder 3 of the steam turbine is selected for external supply. steam.

The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Although the utility model has been disclosed as above with the embodiment, it is not used to limit the protection scope of the utility model, and any technical personnel familiar with the technology can make changes and changes without departing from the concept and scope of the utility model. Retouching should all belong to the protection scope of the present utility model.

Claims (5)

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.

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