Electrified transformation fused salt energy storage and steam supply system in petrochemical industry

Abstract

The invention discloses an electrified transformation fused salt energy storage and steam supply system in the petrochemical industry, and relates to an energy storage and steam supply system. The invention aims to solve the problem of excessive carbon emission in the production process of the existing petrochemical industry. The system comprises a groove type heat collecting system, a hot salt pump, a hot salt tank, a cold salt pump, a cold salt tank, a superheater, an evaporator, a preheater, a front preheater, a deaerator and a water feeding pump, the cold salt pump pumps fused salt in the cold salt tank into the groove type heat collecting system, and the hot salt pump sequentially pumps fused salt in the hot salt tank into the fused salt side of the superheater, the evaporator and the preheater from top to bottom; a water feeding pump sequentially pumps feed water in a deaerator into the water / steam side of the front preheater, the preheater, the evaporator and the superheater from front to back, fused salt and the feed water exchange heat in the pumping process, and superheated steam generated by heating the feed water enters a main steam system, the front preheater and the deaerator through a steam outlet of the superheater. The method is used for electrified transformation of fused salt energy storage and steam supply in the petrochemical industry.

Description

Technical Field

[0001] The invention relates to an energy storage steam supply system, and in particular to a molten salt energy storage steam supply system for electrification transformation in the petrochemical industry. Background Art

[0002] In recent years, with the proposal and implementation of my country's "dual carbon" goals, all walks of life have accelerated the clean and low-carbon transformation. The petrochemical industry is a pillar industry of my country's national economy and one of the key high-energy-consuming industries. The total amount of energy used in the petrochemical industry is large and diverse, with high carbon emission intensity, low overall electrification level and great development potential. Accelerating the development of electrification has become an important starting point for the clean and low-carbon transformation of the industry.

[0003] In the petrochemical industry, steam is widely used in crude oil extraction, heating, drying, distillation, melting, refining and other processes. In the process of crude oil extraction, especially in the extraction of heavy oil and heavy oil, the use of steam injection can significantly improve the recovery rate; in the process of oil refining, steam is needed to heat crude oil and promote the separation of different components in crude oil in the distillation tower. In addition, in chemical reactions such as catalytic cracking, the use of steam also helps to improve reaction efficiency and reduce energy consumption.

[0004] In the production work of petrochemical industry, coal, oil and gas boilers are usually used to generate steam, which also generates a lot of carbon emissions. Carbon emissions mainly come from fuel combustion emissions, followed by process emissions. In order to reduce carbon emissions in the production process of petrochemical industry, we have developed a molten salt energy storage steam supply system for electrification transformation of petrochemical industry, which is mainly used for electrification transformation of petrochemical industry. Summary of the invention

[0005] In order to solve the problem of excessive carbon emissions in the existing petrochemical industry production process, the present invention further proposes a molten salt energy storage steam supply system for electrification transformation of the petrochemical industry.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry includes a trough type thermal collector system, a hot salt pump, a hot salt tank, a cold salt pump, a cold salt tank, a superheater, an evaporator, a preheater, a preheater, a deaerator and a feed water pump. The cold salt pump pumps the molten salt in the cold salt tank into the trough type thermal collector system. The trough type thermal collector system heats the molten salt, and the heated molten salt enters the hot salt tank for storage. The hot salt pump pumps the molten salt in the hot salt tank into the molten salt side of the superheater, the evaporator and the preheater in sequence from front to back. The feed water pump pumps the feed water in the deaerator into the water / steam side of the preheater, the preheater, the evaporator and the superheater in sequence from front to back. The molten salt and the feed water exchange heat during the pumping process. The superheated steam generated by the feed water heating enters the main steam system, the preheater and the deaerator through the superheater steam outlet.

[0008] Furthermore, the liquid inlet end of the cold salt pump is arranged at the bottom of the inner side of the cold salt tank, the liquid outlet end of the cold salt pump is connected to the liquid inlet end of the trough type solar collector system through the cold salt pipeline, the liquid outlet end of the trough type solar collector system is connected to the liquid inlet end of the hot salt tank through the hot salt pipeline, the liquid inlet end of the hot salt pump is arranged at the bottom of the inner side of the hot salt tank, the liquid outlet end of the hot salt pump is connected to the molten salt liquid inlet end of the superheater through the first hot salt pipeline, the molten salt liquid outlet end of the superheater is connected to the molten salt liquid inlet end of the evaporator through the second hot salt pipeline, the molten salt liquid outlet end of the evaporator is connected to the molten salt liquid inlet end of the preheater through the third hot salt pipeline, and the molten salt liquid outlet end of the preheater is connected to the liquid inlet end of the cold salt tank through the fourth hot salt pipeline.

[0009] Furthermore, the cold salt pump is arranged on the upper part of the top of the cold salt tank, and the hot salt pump is arranged on the upper part of the top of the hot salt tank.

[0010] Furthermore, the feed water inlet end of the deaerator is connected to the desalted water pipeline, the feed water outlet end of the deaerator is connected to the feed water inlet end of the feed water pump through the first feed water pipeline, the feed water outlet end of the feed water pump is connected to the feed water inlet end of the pre-preheater through the second feed water pipeline, the feed water outlet end of the pre-preheater is connected to the feed water inlet end of the preheater through the third feed water pipeline, the feed water outlet end of the preheater is connected to the feed water inlet end of the evaporator through the fourth feed water pipeline, the feed water outlet end of the evaporator is connected to the feed water inlet end of the superheater through the fifth feed water pipeline, the steam outlet end of the superheater is respectively connected to the steam inlet ends of the main steam pipeline and the heat exchange steam pipeline through the superheated steam pipeline, the steam outlet end of the heat exchange steam pipeline is respectively connected to the first steam inlet ends of the pre-preheater and the deaerator, and the steam outlet end of the pre-preheater is connected to the second steam inlet end of the deaerator through the deoxygenation steam pipeline.

[0011] Furthermore, the petrochemical industry electrification transformation molten salt energy storage steam supply system also includes a molten salt electric heater, which is arranged in parallel with the trough type thermal collection system, and the molten salt in the cold salt tank is pumped into the trough type thermal collection system and the molten salt electric heater respectively, the trough type thermal collection system and the molten salt electric heater heat the molten salt respectively, and the heated molten salt enters the hot salt tank for storage.

[0012] Furthermore, the liquid outlet of the cold salt pump is connected to the liquid inlet of the molten salt electric heater through a cold salt electric heating pipeline, and the liquid outlet of the molten salt electric heater is connected to the liquid inlet of the hot salt tank through a hot salt electric heating pipeline.

[0013] Furthermore, the petrochemical industry electrification transformation molten salt energy storage steam supply system also includes a temperature regulating pump and a salt mixer. The temperature regulating pump pumps the molten salt in the cold salt tank and the hot salt pump pumps the molten salt in the hot salt tank into the salt mixer respectively. The mixed molten salt is then pumped into the molten salt side of the superheater, kettle evaporator and preheater in sequence from front to back.

[0014] Furthermore, the liquid outlet of the hot salt pump is connected to the liquid inlet of the first hot salt pipeline, the liquid outlet of the first hot salt pipeline is connected to the first liquid inlet of the salt mixer, the liquid inlet of the temperature regulating pump is arranged at the bottom of the inner side of the cold salt tank, the liquid outlet of the temperature regulating pump is connected to the second liquid inlet of the salt mixer through the cold salt temperature regulating pipeline, and the liquid outlet of the salt mixer is connected to the molten salt liquid inlet of the superheater.

[0015] Furthermore, the temperature regulating pump is arranged on the upper part of the top of the cold salt tank.

[0016] Furthermore, the evaporator is a kettle evaporator.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The petrochemical industry uses coal-fired, oil-fired and gas-fired boilers to produce steam to meet the needs of crude oil extraction, steam, heating, drying, distillation, melting, refining and other process flows, and a large amount of carbon emissions are generated during the steam generation and process production.

[0019] The present invention sets up a molten salt heat storage system, uses a trough-type heat collection system, valley electricity, green electricity, etc. to heat molten salt, and solves the problem of unstable renewable energy through heat storage. The system can use green electricity and valley electricity of abandoned solar and wind power as energy sources to achieve low-carbon emissions, and can directly use solar energy as an energy source to achieve low-carbon emissions; the system can adjust the system operating parameters according to production needs, and provide industrial steam with different parameters for production, so as to achieve multiple uses of one machine. At the same time, the output temperature of the molten salt after heating can reach about 550°C, which can meet the heat demand and steam overheating needs of most oil extraction and petrochemical enterprises. Setting up a large molten salt tank and using hot molten salt to heat oil materials can replace the current coal-fired, oil-fired and gas-fired boilers, which can greatly reduce the carbon emissions of petrochemical enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Specific implementation method 1: Combination Figure 1The present embodiment is described. The present embodiment describes a molten salt energy storage steam supply system for electrification transformation of the petrochemical industry, which includes a trough type solar collector system 1, a hot salt pump 3, a hot salt tank 4, a cold salt pump 6, a cold salt tank 7, a superheater 9, an evaporator 10, a preheater 11, a preheater 12, a deaerator 13 and a feed water pump 14. The cold salt pump 6 pumps the molten salt in the cold salt tank 7 into the trough type solar collector system 1. The trough type solar collector system 1 heats the molten salt. The heated molten salt enters the hot salt tank 4 for storage. The salt pump 3 pumps the molten salt in the hot salt tank 4 into the molten salt side of the superheater 9, the evaporator 10 and the preheater 11 from front to back, and the feed water pump 14 pumps the feed water in the deaerator 13 into the water / steam side of the pre-preheater 12, the preheater 11, the evaporator 10 and the superheater 9 from front to back. The molten salt and the feed water exchange heat during the pumping process, and the superheated steam generated by heating the feed water enters the main steam system, the pre-preheater 12 and the deaerator 13 respectively through the steam outlet of the superheater 9.

[0023] Specific implementation method 2: Combination Figure 1 To illustrate this embodiment, the liquid inlet end of the cold salt pump 6 of this embodiment is arranged at the bottom of the inner side of the cold salt tank 7, the liquid outlet end of the cold salt pump 6 is connected to the liquid inlet end of the trough type solar collector system 1 through the cold salt pipeline 34, the liquid outlet end of the trough type solar collector system 1 is connected to the liquid inlet end of the hot salt tank 4 through the hot salt pipeline 15, the liquid inlet end of the hot salt pump 3 is arranged at the bottom of the inner side of the hot salt tank 4, the liquid outlet end of the hot salt pump 3 is connected to the molten salt liquid inlet end of the superheater 9 through the hot salt first pipeline 16, the molten salt liquid outlet end of the superheater 9 is connected to the molten salt liquid inlet end of the evaporator 10 through the hot salt second pipeline 17, the molten salt liquid outlet end of the evaporator 10 is connected to the molten salt liquid inlet end of the preheater 11 through the hot salt third pipeline 18, and the molten salt liquid outlet end of the preheater 11 is connected to the liquid inlet end of the cold salt tank 7 through the hot salt fourth pipeline 19.

[0024] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0025] Specific implementation method three: Combination Figure 1 This embodiment is described. In this embodiment, the cold salt pump 6 is arranged on the upper part of the top of the cold salt tank 7, and the hot salt pump 3 is arranged on the upper part of the top of the hot salt tank 4.

[0026] The undisclosed technical features in this embodiment are the same as those in the second embodiment.

[0027] Specific implementation method four: Combination Figure 1To explain this embodiment, the water inlet end of the deaerator 13 of this embodiment is connected to the desalted water pipeline 20, the water outlet end of the deaerator 13 is connected to the water inlet end of the water pump 14 through the first water supply pipeline 21, the water outlet end of the water pump 14 is connected to the water inlet end of the preheater 12 through the second water supply pipeline 22, the water outlet end of the preheater 12 is connected to the water inlet end of the preheater 11 through the third water supply pipeline 23, and the water outlet end of the preheater 11 is connected to the water inlet end of the preheater 11 through the fourth water supply pipeline 24. It is connected to the water feed inlet end of the evaporator 10, the water feed outlet end of the evaporator 10 is connected to the water feed inlet end of the superheater 9 through the fifth water feed pipeline 25, the steam outlet end of the superheater 9 is respectively connected to the steam inlet ends of the main steam pipeline 27 and the heat exchange steam pipeline 28 through the superheated steam pipeline 26, the steam outlet end of the heat exchange steam pipeline 28 is respectively connected to the first steam inlet ends of the pre-preheater 12 and the deaerator 13, and the steam outlet end of the pre-preheater 12 is connected to the second steam inlet end of the deaerator 13 through the deoxygenation steam pipeline 29.

[0028] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0029] Specific implementation method five: Combination Figure 1 To illustrate this embodiment, a molten salt energy storage and steam supply system for electrification transformation of the petrochemical industry described in this embodiment also includes a molten salt electric heater 2, which is arranged in parallel with the trough type solar collector system 1, and the molten salt in the cold salt tank 7 is pumped into the trough type solar collector system 1 and the molten salt electric heater 2 respectively, the trough type solar collector system 1 and the molten salt electric heater 2 respectively heat the molten salt, and the heated molten salt enters the hot salt tank 4 for storage.

[0030] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0031] Specific implementation method six: Combination Figure 1 To illustrate this embodiment, the liquid outlet of the cold salt pump 6 in this embodiment is connected to the liquid inlet of the molten salt electric heater 2 through the cold salt electric heating pipeline 30, and the liquid outlet of the molten salt electric heater 2 is connected to the liquid inlet of the hot salt tank 4 through the hot salt electric heating pipeline 31.

[0032] The undisclosed technical features in this embodiment are the same as those in the fifth embodiment.

[0033] Specific implementation method seven: Combination Figure 1 To illustrate this embodiment, a molten salt energy storage steam supply system for electrification transformation of the petrochemical industry described in this embodiment also includes a temperature regulating pump 5 and a salt mixer 8. The temperature regulating pump 5 pumps the molten salt in the cold salt tank 7 and the hot salt pump 3 pumps the molten salt in the hot salt tank 4 into the salt mixer 8 respectively, and the mixed molten salt is then pumped into the molten salt side of the superheater 9, the kettle evaporator 10 and the preheater 11 in sequence from front to back.

[0034] The undisclosed technical features in this embodiment are the same as those in the first or fifth embodiment.

[0035] Specific implementation method eight: Combination Figure 1 To illustrate this embodiment, the liquid outlet end of the hot salt pump 3 in this embodiment is connected to the liquid inlet end of the hot salt first pipeline 16, the liquid outlet end of the hot salt first pipeline 16 is connected to the first liquid inlet end of the salt mixer 8, the liquid inlet end of the temperature control pump 5 is arranged at the bottom of the inner side of the cold salt tank 7, the liquid outlet end of the temperature control pump 5 is connected to the second liquid inlet end of the salt mixer 8 through the cold salt temperature control pipeline 32, and the liquid outlet end of the salt mixer 8 is connected to the molten salt liquid inlet end of the superheater 9.

[0036] The undisclosed technical features in this embodiment are the same as those in the seventh embodiment.

[0037] Specific implementation method nine: Combination Figure 1 To explain this embodiment, the temperature regulating pump 5 described in this embodiment is arranged on the upper part of the top of the cold salt tank 7.

[0038] The undisclosed technical features in this embodiment are the same as those in the eighth embodiment.

[0039] Specific implementation method ten: Combination Figure 1 To explain the present embodiment, the evaporator 10 described in the present embodiment is a kettle type evaporator.

[0040] The undisclosed technical features in this embodiment are the same as those in the first embodiment.

[0041] Embodiment 1

[0042] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry comprises a trough type solar collector system 1, a hot salt pump 3, a hot salt tank 4, a cold salt pump 6, a cold salt tank 7, a superheater 9, an evaporator 10, a preheater 11, a preheater 12, a deaerator 13 and a feed water pump 14. The cold salt pump 6 pumps the molten salt in the cold salt tank 7 into the trough type solar collector system 1. The trough type solar collector system 1 heats the molten salt. The heated molten salt enters the hot salt tank 4 for storage. The hot salt pump 3 pumps the hot salt tank The molten salt in 4 is pumped into the molten salt side of the superheater 9, the evaporator 10 and the preheater 11 from front to back, and the feed water pump 14 pumps the feed water in the deaerator 13 into the water / steam side of the pre-preheater 12, the preheater 11, the evaporator 10 and the superheater 9 from front to back. The molten salt and the feed water exchange heat during the pumping process, and the superheated steam generated by the feed water heating enters the main steam system, the pre-preheater 12 and the deaerator 13 respectively through the steam outlet of the superheater 9.

[0043] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry also includes a molten salt electric heater 2, which is arranged in parallel with a trough type solar collector system 1. The molten salt in a cold salt tank 7 is pumped into the trough type solar collector system 1 and the molten salt electric heater 2 respectively. The trough type solar collector system 1 and the molten salt electric heater 2 heat the molten salt respectively, and the heated molten salt enters a hot salt tank 4 for storage.

[0044] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry also includes a temperature regulating pump 5 and a salt mixer 8. The temperature regulating pump 5 pumps the molten salt in the cold salt tank 7 and the hot salt pump 3 pumps the molten salt in the hot salt tank 4 into the salt mixer 8 respectively, and the mixed molten salt is then pumped into the molten salt side of the superheater 9, the kettle evaporator 10 and the preheater 11 in sequence from front to back.

[0045] Embodiment 2

[0046] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry is composed of a cold salt tank 7, a cold salt pump 6, a trough-type heat collection system 1, and a hot salt tank 4. During operation, the cold salt pump 6 pumps the molten salt in the cold salt tank 7 into the trough-type heat collection system 1, and the molten salt in the cold salt tank 7 is heated in the trough-type heat collection system 1, and the heated molten salt enters the hot salt tank 4 for storage.

[0047] Embodiment 3

[0048] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry is composed of a cold salt tank 7, a cold salt pump 6, a molten salt electric heater 2, and a hot salt tank 4. During operation, the cold salt pump 6 pumps the molten salt in the cold salt tank 7 into the molten salt electric heater 2, and the molten salt in the cold salt tank 7 is heated by the molten salt electric heater 2, and the heated molten salt enters the hot salt tank 4 for storage.

[0049] Embodiment 4

[0050] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry is structurally composed of a hot salt tank 4, a hot salt pump 3, a cold salt pump 3, a superheater 9, an evaporator 10, a preheater 11, a pre-preheater 12, a feed water pump 14, a deaerator and a cold salt tank 7. During operation, the hot salt pump 3 pumps the molten salt in the hot salt tank 4 into the molten salt side of the superheater 9, evaporator 10, and preheater 11 in sequence, and the feed water pump 14 pumps the feed water in the deaerator 13 into the pre-preheater 12, preheater 11, evaporator 10, and superheater 9 in sequence. The molten salt and water / steam exchange heat in the superheater 9, evaporator 10, and preheater 11 to generate superheated steam required for production. A portion of the steam at the steam outlet of the superheater 9 enters the pre-preheater 12 to heat the feed water from the deaerator 13, raising the feed water temperature to a safe temperature, and enters the deaerator 13 after heat exchange. A portion of the steam at the steam outlet of the superheater 9 enters the deaerator to deoxygenate the feed water at room temperature.

[0051] Embodiment 5

[0052] A molten salt energy storage steam supply system for electrification transformation of the petrochemical industry is structurally composed of a hot salt tank 4, a cold salt pump 3, a cold salt tank 7, a temperature regulating pump 5, a salt mixer 8, a superheater 9, an evaporator 10, a preheater 11, a pre-preheater 12, a feed water pump 14, a deaerator and a cold salt tank 7. According to production requirements, when the system needs to operate with different parameters, the hot salt pump 3 pumps out the molten salt in the hot salt tank 4, and the thermostatic pump 3 pumps out the molten salt in the cold salt tank 7. The two molten salts enter the salt mixer for mixing. After mixing, they are adjusted to the required parameters and enter the molten salt side of the superheater 9, evaporator 10, and preheater 11 in turn. The feed water pump 14 pumps the feed water in the deaerator 13 into the pre-preheater 12, preheater 11, evaporator 10, and superheater 9 in turn. The molten salt and water / steam exchange heat in the superheater 9, evaporator 10, and preheater 11 to generate the superheated steam required for production. A part of the steam at the steam outlet of the superheater 9 enters the pre-preheater 12 to heat the feed water from the deaerator 13, raising the feed water temperature to a safe temperature, and enters the deaerator 13 after heat exchange. A part of the steam at the steam outlet of the superheater 9 enters the deaerator to deoxygenate the feed water at room temperature.

[0053] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A molten salt energy storage steam supply system for electrification transformation of petrochemical industry, characterized by: The invention comprises a trough type solar collector system (1), a hot salt pump (3), a hot salt tank (4), a cold salt pump (6), a cold salt tank (7), a superheater (9), an evaporator (10), a preheater (11), a preheater (12), a deaerator (13) and a water supply pump (14). The cold salt pump (6) pumps the molten salt in the cold salt tank (7) into the trough type solar collector system (1). The trough type solar collector system (1) heats the molten salt. The heated molten salt enters the hot salt tank (4) for storage. The hot salt pump (3) pumps the molten salt in the hot salt tank (4) into the trough type solar collector system (1). The salt is pumped into the molten salt side of the superheater (9), evaporator (10) and preheater (11) from front to back, and the feed water pump (14) pumps the feed water in the deaerator (13) into the water / steam side of the preheater (12), preheater (11), evaporator (10) and superheater (9) from front to back. The molten salt and the feed water exchange heat during the pumping process. The feed water is heated to generate superheated steam, which enters the main steam system, preheater (12) and deaerator (13) through the steam outlet of the superheater (9).

2. According to claim 1, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The liquid inlet of the cold salt pump (6) is arranged at the bottom of the inner side of the cold salt tank (7), the liquid outlet of the cold salt pump (6) is connected to the liquid inlet of the trough type heat collection system (1) through the cold salt pipeline (34), the liquid outlet of the trough type heat collection system (1) is connected to the liquid inlet of the hot salt tank (4) through the hot salt pipeline (15), the liquid inlet of the hot salt pump (3) is arranged at the bottom of the inner side of the hot salt tank (4), and the liquid outlet of the hot salt pump (3) is connected to the liquid inlet of the hot salt tank (4) through the hot salt first pipeline (15). (16) is connected to the molten salt liquid inlet of the superheater (9), the molten salt liquid outlet of the superheater (9) is connected to the molten salt liquid inlet of the evaporator (10) through the hot salt second pipeline (17), the molten salt liquid outlet of the evaporator (10) is connected to the molten salt liquid inlet of the preheater (11) through the hot salt third pipeline (18), and the molten salt liquid outlet of the preheater (11) is connected to the liquid inlet of the cold salt tank (7) through the hot salt fourth pipeline (19).

3. According to claim 2, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The cold salt pump (6) is arranged on the upper part of the top of the cold salt tank (7), and the hot salt pump (3) is arranged on the upper part of the top of the hot salt tank (4).

4. According to claim 1, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The water supply inlet of the deaerator (13) is connected to the desalted water pipeline (20), the water supply outlet of the deaerator (13) is connected to the water supply inlet of the water supply pump (14) through the first water supply pipeline (21), the water supply outlet of the water supply pump (14) is connected to the water supply inlet of the preheater (12) through the second water supply pipeline (22), the water supply outlet of the preheater (12) is connected to the water supply inlet of the preheater (11) through the third water supply pipeline (23), and the water supply outlet of the preheater (11) is connected to the evaporator (10) through the fourth water supply pipeline (24). The water supply liquid inlet end of the evaporator (10) is connected to the water supply liquid inlet end of the superheater (9) through a fifth water supply pipeline (25); the steam outlet end of the superheater (9) is connected to the steam inlet end of the main steam pipeline (27) and the heat exchange steam pipeline (28) through a superheated steam pipeline (26); the steam outlet end of the heat exchange steam pipeline (28) is connected to the first steam inlet end of the preheater (12) and the deaerator (13) respectively; the steam outlet end of the preheater (12) is connected to the second steam inlet end of the deaerator (13) through a deaerator steam pipeline (29).

5. According to claim 1, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The petrochemical industry electrification transformation molten salt energy storage steam supply system also includes a molten salt electric heater (2), the molten salt electric heater (2) is arranged in parallel with the trough type heat collection system (1), the molten salt in the cold salt tank (7) is pumped into the trough type heat collection system (1) and the molten salt electric heater (2), the trough type heat collection system (1) and the molten salt electric heater (2) heat the molten salt, respectively, and the heated molten salt enters the hot salt tank (4) for storage.

6. According to claim 5, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The liquid outlet of the cold salt pump (6) is connected to the liquid inlet of the molten salt electric heater (2) via a cold salt electric heating pipeline (30), and the liquid outlet of the molten salt electric heater (2) is connected to the liquid inlet of the hot salt tank (4) via a hot salt electric heating pipeline (31).

7. A molten salt energy storage steam supply system for electrification transformation of petrochemical industry according to claim 1 or 5, characterized in that: The petrochemical industry electrification transformation molten salt energy storage steam supply system also includes a temperature regulating pump (5) and a salt mixer (8). The temperature regulating pump (5) pumps the molten salt in the cold salt tank (7) and the hot salt pump (3) pumps the molten salt in the hot salt tank (4) into the salt mixer (8), and the mixed molten salt is then pumped into the molten salt side of the superheater (9), the kettle evaporator (10) and the preheater (11) in sequence from front to back.

8. According to claim 7, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The liquid outlet of the hot salt pump (3) is connected to the liquid inlet of the first hot salt pipeline (16), the liquid outlet of the first hot salt pipeline (16) is connected to the first liquid inlet of the salt mixer (8), the liquid inlet of the temperature regulating pump (5) is arranged at the bottom of the inner side of the cold salt tank (7), the liquid outlet of the temperature regulating pump (5) is connected to the second liquid inlet of the salt mixer (8) through the cold salt temperature regulating pipeline (32), and the liquid outlet of the salt mixer (8) is connected to the molten salt liquid inlet of the superheater (9).

9. According to claim 8, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The temperature regulating pump (5) is arranged on the upper part of the top of the cold salt tank (7).

10. According to claim 1, a molten salt energy storage steam supply system for electrification transformation of petrochemical industry is characterized by: The evaporator (10) is a kettle type evaporator.

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