Fused salt utilization plant based on electric heating

Abstract

The invention relates to the technical field of fused salt plants, in particular to a fused salt utilization plant based on electric heating, which comprises a fused salt packaging device electrically connected with an electric heating device, and the fused salt packaging device is respectively communicated and connected with an original industrial steam supply main pipe and a steam turbine through steam supply pipelines arranged in parallel; the fused salt packaging device is communicated and connected with a deaerator through a water supply pipeline, and the deaerator is communicated and connected with the water return tank through a water return pipeline; a deoxidizing heating steam pipeline is communicated and connected between the deaerator and the original industrial steam supply main pipe; the deaerator, the water feeding pump, the water return tank, the water return pump and other devices are reasonably arranged, abandoned wind and abandoned light electric energy can be effectively absorbed and converted into heat energy to be stored, and the heat energy is released when needed and used for power generation or heat supply, the energy utilization efficiency is overall improved, the power grid stability is enhanced, and the large-scale, efficient and safe fused salt energy storage requirement can be met; meanwhile, the workshop is reasonable in structural layout, space can be fully utilized, and the civil engineering cost of the workshop is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of molten salt plants, and in particular to a molten salt utilization plant based on electric heating. Background Art

[0002] Against the backdrop of the current accelerated transformation of the energy structure, the scale of power generation from renewable energy sources such as wind power and photovoltaics continues to expand; however, the power generation side of such unstable power sources is difficult to match the load demand during peak electricity consumption, and the problem of insufficient power supply capacity becomes prominent. When the installed capacity of wind power and photovoltaics exceeds the regulation capacity of the power grid, the phenomenon of wind and solar power abandonment occurs frequently.

[0003] To effectively address the above challenges, energy storage technology becomes the key. Among the many energy storage methods, molten salt energy storage has become a highly promising solution due to its significant advantages such as high heat storage efficiency and large heat storage capacity. Through molten salt energy storage, it is possible to effectively absorb abandoned wind and solar energy, convert it into thermal energy and store it, and release it when needed for power generation or heating, thereby improving energy utilization efficiency and enhancing grid stability. At present, the existing molten salt heating technology and related plant facilities have exposed many problems in practical applications. The existing molten salt utilization plant based on electric heating has many deficiencies in technology and equipment, and it is difficult to meet the needs of large-scale, efficient and safe molten salt energy storage. Improvements are urgently needed to improve the overall performance of the molten salt energy storage system. In view of this, we propose a molten salt utilization plant based on electric heating. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies mentioned in the above background technology and provide a molten salt utilization plant based on electric heating.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: A molten salt utilization plant based on electric heating, comprising a molten salt container electrically connected to an electric heating device, wherein the molten salt container is respectively connected to an existing industrial steam supply main pipe and a steam turbine via parallel steam supply pipes; The molten salt container is connected to a deaerator via a water supply pipe, the deaerator is connected to a return water tank via a return water pipe, and the return water tank is connected to a heat user return water pipe for returning water; A deoxidizing heating steam pipeline is connected between the deaerator and the original industrial steam supply main pipe.

[0006] Preferably, the deaerator is equipped with a water recirculation pipeline for conducting the water supply pipeline.

[0007] Preferably, a water pump is installed on the pipe body at the connection between the water supply pipeline and the water supply recirculation pipeline close to the deaerator; The water supply pump is used to supply water along the deaerator toward the molten salt container device.

[0008] Preferably, a valve and a return water pump are installed on the return water pipeline, and the return water pump is used to transport return water along the return water tank toward the deaerator.

[0009] Preferably, a return water recirculation pipe is installed between the return water pipe and the return water tank, and the return water recirculation pipe is arranged in parallel with the return water pump.

[0010] Preferably, the steam turbine is electrically connected to a generator, and the generator is electrically connected to the electric heating device.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This molten salt utilization plant based on electric heating can effectively absorb abandoned wind and solar energy by rationally arranging deaerators, water feed pumps, return water tanks and return water pumps, converting it into thermal energy and storing it, which can be released when needed for power generation or heating, thereby improving energy utilization efficiency as a whole, enhancing grid stability, and meeting the needs of large-scale, efficient and safe molten salt energy storage. At the same time, the plant has a reasonable structural layout, can make full use of space, has a small construction workload, is easy to construct, and saves civil engineering costs of the plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure installation of the present invention; Figure 2 One of the installation layout plans of the present invention; Figure 3 This is the second installation layout plan of the present invention; Figure 4 It is a side view of the overall installation layout of the present invention.

[0013] The meaning of each number in the figure is: 1. Molten salt container; 2. Electric heating device; 3. Steam turbine; 4. Generator; 5. Deaerator; 6. Feed water pump; 7. Return water pump; 8. Return water tank; 9. Steam supply pipeline; 10. Feed water pipeline; 11. Feed water recirculation pipeline; 12. Deaerator heating steam pipeline; 13. Return water pipeline; 14. Return water recirculation pipeline. DETAILED DESCRIPTION

[0014] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] See also Figure 1-4 The present invention describes the above technical solution in detail through the following embodiments: This embodiment is based on an electrically heated molten salt utilization plant, including a molten salt container 1 electrically connected to an electric heating device 2. The molten salt container 1 is an application of an existing product, so no further explanation is given. Figure 1 As shown, the molten salt container device 1 is connected to the original industrial steam supply main pipe and the steam turbine 3 through the steam supply pipe 9 arranged in parallel. This part of the hot steam can be transported into the original industrial steam supply main pipe to provide heating. If there is a lot of excess steam, the valve of the steam supply pipe 9 connected to the steam turbine 3 can be opened to allow steam to enter the steam turbine 3 for steam power generation; the power supply of the electric heating device 2 in this application comes from the electrically connected generator 4, and the generator 4 provides power generation through the connected steam turbine 3; the molten salt utilization plant of this embodiment is respectively installed as follows Figure 2-Figure 4 In the double-storey factory building shown, a three-dimensional installation layout is formed, which can make full use of the space and save on factory construction.

[0016] The molten salt container 1 is connected to the deaerator 5 through the water supply pipe 10. In order to obtain the return water source, the return water of the heat user is collected and connected to the return water tank 8 through the heat user return water pipe. The return water pipe 13 is connected between the deaerator 5 and the return water tank 8. Figure 1 In the structure shown, a return water recirculation pipe 14 is installed in parallel between the return water pipe 13 and the return water tank 8 , and a return water pump 7 is installed on the return water pipe 13 to transport water to the deaerator 5 .

[0017] In this embodiment, a deoxidizing heating steam pipe 12 is connected between the deaerator 5 and the original industrial steam supply main pipe. The deoxidizing heating steam pipe 12 can also utilize the exhaust steam of the unit to realize the exhaust steam consumption of part of the unit. In order to form a circulation structure, such as Figure 1 In the structure shown, a water recirculation pipe 11 is installed between the deaerator 5 and the water supply pipe 10, and a water supply pump 6 is installed on the pipe body close to the deaerator 5. The water flow can be introduced into the molten salt container device 1 through the water supply pump 6.

[0018] The working principle of the molten salt utilization plant based on electric heating in this embodiment is as follows: energy storage and utilization are achieved through two core processes: heat storage and heat release. In the heat storage stage, unstable electric energy such as abandoned wind and solar power is used, and the electric energy generated by the generator 4 drives the electric heating device 2 to heat the molten salt in the molten salt container 1 to a high temperature state, completing the conversion and storage of electric energy into thermal energy; in the heat release stage, when electricity or heat is needed, water flow is drawn out to generate steam for heat exchange, and the stored heat energy is released and then cooled to become molten salt. The steam can be used to drive the steam turbine 3 to generate electricity or be directly incorporated into the original industrial steam supply main for heating, thereby realizing the cross-time allocation and efficient utilization of energy.

[0019] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0020] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced therein.

Claims

1. A molten salt utilization plant based on electric heating, comprising a molten salt container (1) electrically connected to an electric heating device (2), characterized in that: The molten salt container device (1) is connected to the original industrial steam supply main pipe and the steam turbine (3) respectively through the steam supply pipelines (9) arranged in parallel; The molten salt container (1) is connected to a deaerator (5) via a water supply pipe (10), the deaerator (5) is connected to a return water tank (8) via a return water pipe (13), and the return water tank (8) is connected to a heat user return water pipe for returning water; A deoxidizing heating steam pipeline (12) is connected between the deaerator (5) and the original industrial steam supply main pipe.

2. The molten salt utilization plant based on electric heating according to claim 1, characterized in that: The deaerator (5) is provided with a water supply recirculation pipe (11) for conducting the water supply pipe (10) connected thereto.

3. The molten salt utilization plant based on electric heating according to claim 2, characterized in that: A water pump (6) is installed on the pipe body at the connection between the water supply pipe (10) and the water supply recirculation pipe (11) and close to the deaerator (5); The water supply pump (6) is used to supply water along the deaerator (5) toward the molten salt container device (1).

4. The molten salt utilization plant based on electric heating according to claim 1, characterized in that: A valve and a return water pump (7) are installed on the return water pipe (13), and the return water pump (7) is used to transport return water along the return water tank (8) toward the deaerator (5).

5. The molten salt utilization plant based on electric heating according to claim 4, characterized in that: A return water recirculation pipe (14) is connected between the return water pipe (13) and the return water tank (8), and the return water recirculation pipe (14) is arranged in parallel with the return water pump (7).

6. The molten salt utilization plant based on electric heating according to claim 1, characterized in that: The steam turbine (3) is electrically connected to a generator (4), and the generator (4) is electrically connected to the electric heating device (2).

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