CN217140320U

CN217140320U - Salt melting and energy storage system with heat source outside pipe

Info

Publication number: CN217140320U
Application number: CN202220842464.7U
Authority: CN
Inventors: 栾海峰; 宗弟元; 李姗; 杨志丹
Original assignee: China Shipbuilding New Energy Co ltd; China State Shipbuilding Corp Ltd
Current assignee: China Shipbuilding New Energy Co ltd; China State Shipbuilding Corp Ltd
Priority date: 2022-04-12
Filing date: 2022-04-12
Publication date: 2022-08-09
Anticipated expiration: 2032-04-12

Abstract

The utility model relates to the field of molten salt melting, and discloses an external heat source type salt melting and energy storage system, which comprises a heat exchanger, wherein the heat exchanger comprises a shell, and a molten salt pipe is arranged in the shell; one end of the molten salt pipe is provided with a molten salt inlet, and the molten salt inlet is connected with an outlet of the molten salt pump; the other end of the molten salt pipe is provided with a molten salt outlet, and the molten salt outlet conveys the molten salt back into the molten salt furnace through a molten salt output pipeline; the shell is provided with a heat source inlet and a heat source outlet; the heat source inlet and the heat source outlet are respectively connected with the heat source supply system. The utility model provides a high temperature fused salt all need strict control to fuel and oxidant ratio among the prior art, the problem of fuel burning production pollutant.

Description

Salt melting and energy storage system with heat source outside pipe

Technical Field

The utility model relates to a fused salt field of melting, more specifically relates to an extratubal heat source formula salt and energy storage system.

Background

At present, the salt melting system can be divided into an in-pipe molten salt type and an in-pipe smoke type salt melting system according to the relative position of the molten salt and the smoke, and compared with the in-pipe molten salt type salt melting system, the in-pipe smoke type salt melting system has the advantages of preventing the molten salt from being solidified and blocked in the pipe and the like. In-pipe molten salt formation systems typically include: the feeding system and the molten salt furnace comprise a furnace body, a burner, a molten salt coil, a buffer tank, a molten salt pump and related pipelines; in-pipe flue gas desalination systems typically include: the feeding system and the molten salt furnace comprise a combustor, a flue gas coil, a pressure vessel, a stirrer, a buffer tank, a molten salt pump and related pipelines.

The prior salt dissolving technology has the following defects: because high-temperature molten salt is involved, the in-pipe molten salt type and in-pipe smoke type salt melting systems have strict requirements on the control, proportion and the like of the flow of fuel and oxidant, otherwise, heat waste and equipment damage are caused, and therefore the salt melting system related to combustion is complex; carbon dioxide, pollutant nitrogen oxide and the like are generated in the combustion process of the natural gas, which is not beneficial to realizing the double-carbon target and causes environmental pollution; the existing salt dissolving system is only used when salt is initialized, and the equipment utilization rate is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that high temperature fused salt in the prior art needs to be strictly controlled to fuel and oxidant ratio, the fuel burning produces the pollutant, the utility model provides an extra-pipe heat source formula salt and energy storage system.

The utility model discloses a concrete scheme do: an outside-pipe heat source type salt melting and energy storage system comprises a heat exchanger, wherein the heat exchanger comprises a shell, and a molten salt pipe is arranged in the shell; one end of the molten salt pipe is provided with a molten salt inlet, and the molten salt inlet is connected with an outlet of the molten salt pump; the other end of the molten salt pipe is provided with a molten salt outlet, and the molten salt outlet conveys the molten salt back into the molten salt furnace through a molten salt output pipeline; the shell is provided with a heat source inlet and a heat source outlet; the heat source inlet and the heat source outlet are respectively connected with the heat source supply system.

The molten salt pump is arranged above the molten salt furnace, and an inlet of the molten salt pump extends into the molten salt furnace.

The energy in the heat source supply system is one of high-temperature heat conduction oil heated by solar energy in a mirror field of a photo-thermal power station, high-temperature heat conduction oil heated by abandoned wind and abandoned photoelectric energy, high-temperature molten salt heated by abandoned wind and abandoned photoelectric energy and hot air.

And guide plates are arranged in the salt melting furnace, and are arranged in the salt melting furnace in a vertically staggered manner.

And a self-circulation pipeline is arranged between the outlet of the molten salt pump and the molten salt furnace.

The molten salt output pipeline is provided with a branch pipe, the branch pipe is connected with the molten salt storage tank, and the branch pipe conveys part of molten salt to the molten salt storage tank.

And the outlet of the molten salt pump is connected with the molten salt inlet through a molten salt input pipeline.

And the molten salt input pipeline and the molten salt output pipeline are both provided with first valves.

And the molten salt input pipeline and the branch pipe are respectively provided with a temperature tester, a pressure tester and a flow tester.

And a second valve is arranged on the branch pipe.

The utility model discloses for prior art have following beneficial effect:

1. the utility model arranges a heat exchanger between the salt melting furnace and the fused salt storage tank, and a fused salt pipe is arranged inside the shell of the heat exchanger; one end of the molten salt pipe is provided with a molten salt inlet, and the molten salt inlet is connected with an outlet of the molten salt pump; the other end of the molten salt pipe is provided with a molten salt outlet, and the molten salt outlet conveys the molten salt back into the molten salt furnace through a molten salt output pipeline; the shell is provided with a heat source inlet and a heat source outlet which are respectively connected with the heat source supply system, the fused salt flows in the fused salt pipe, and the heat transfer medium supplied by the heat source supply system flows in the space formed by the shell of the heat exchanger and the fused salt pipe to melt the salt, so that the problem that the fused salt system in the pipe and the smoke salt system in the pipe have strict requirements on the control, proportion and the like of the flow of the fuel and the oxidant due to the high-temperature fused salt in the prior art is solved, and the environmental problem caused by the generation of carbon dioxide and pollutant nitrogen oxide in the combustion process of natural gas is avoided.

2. The utility model discloses well molten salt pump is arranged in the top of changing the salt stove, the entry of this molten salt pump stretches into in the salt stove, set up the guide plate in the salt stove, crisscross setting is in from top to bottom in the guide plate in the salt stove, set up electric heater in the salt stove. The molten salt pump enables molten salt to circulate in the molten salt furnace through a self-circulation pipeline when the molten salt pump works abnormally; when the molten salt melting furnace normally works, the high-temperature molten salt returns to the molten salt melting furnace from the molten salt outlet of the heat exchanger to melt solid molten salt, and the molten salt melting efficiency is high.

3. The utility model discloses all set up the valve on fused salt input pipeline, fused salt output pipeline, the branch pipe, be convenient for cut the flow of fused salt when the outage, the energy saving, the operation of being convenient for.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein the reference numerals are respectively:

1. a molten salt crushing device; 2. a molten salt delivery device; 3. a salt melting furnace; 4. a baffle; 5. a molten salt pump; 6. an electric heater; 7. a molten salt pipe; 8. a housing; 9. a heat source supply system; 10. a valve; 11. a temperature tester; 12. a pressure tester; 13. a flow tester; 16. a self-circulation line; 17. a molten salt inlet; 18. a molten salt outlet; 19. a heat source inlet; 20. a heat source outlet; 21. a molten salt output pipeline; 22. a molten salt input pipeline; 23. a heat exchanger; 24. a branch pipe; 25. and (4) storing the molten salt.

Detailed Description

The present invention will be described in further detail below with reference to the attached drawings, and it should be clearly understood herein that the described embodiments are not all embodiments, but are merely illustrative of the present invention and do not limit the present invention.

The utility model provides an external heat source type salt melting and energy storage system, which comprises a heat exchanger 23, wherein the heat exchanger 23 comprises a shell 8, and a salt melting pipe 7 is arranged inside the shell 8; one end of the molten salt pipe 7 is provided with a molten salt inlet 17, and the molten salt inlet 17 is connected with an outlet of the molten salt pump 5; the other end of the molten salt pipe 7 is provided with a molten salt outlet 18, and the molten salt outlet 18 conveys the molten salt back into the molten salt furnace 3 through a molten salt output pipeline 21; a heat source inlet 19 and a heat source outlet 20 are arranged on the shell 8; the heat source inlet 19 and the heat source outlet 20 are respectively connected with the heat source supply system 9.

The utility model discloses well heat exchanger is inside to set up the fused salt pipe, and the fused salt intraduct sets up the fused salt, sets up the heat source in the space of fused salt pipe outside and the inside formation of heat exchanger shell, and this heat source is used for providing the heat for the fused salt. The solar energy heat supply system comprises a heat source supply system, a heat source storage system and a heat source recovery system, wherein the heat source supply system provides high-temperature heat conduction oil heated by solar energy in a mirror field of a thermoelectric power station, abandons wind and abandons high-temperature heat conduction oil heated by photoelectric energy, abandons wind and abandons high-temperature molten salt heated by photoelectric energy and one of hot wind. The hot air of the utility model is high temperature gas after being heated by electric power, fuel combustion and an energy storage system, and further, the hot air can be selected from inert gases such as high temperature nitrogen, high temperature helium, high temperature carbon dioxide and the like; the state of the high-temperature heat conduction oil and the high-temperature molten salt is liquid, other liquid heat conduction media can also be used as heat source media, and further other liquid heat conduction media can be selected from high-temperature water, high-temperature metal and the like.

The molten salt pump 5 is arranged above the salt melting furnace 3, and an inlet of the molten salt pump 5 extends into the salt melting furnace 3. And the molten salt pump pumps the molten salt out of the molten salt pipe in the heat exchanger, the molten salt is in the pipe, and the heat source is outside the pipe, so that the external heat source type salt melting and energy storage system is formed.

The salt melting furnace 3 is internally provided with guide plates 4, and the guide plates 4 are arranged in the salt melting furnace 3 in a vertically staggered manner. The arrangement of the guide plate is convenient for shunting and guiding the molten salt. A self-circulation pipeline 16 is arranged between the outlet of the molten salt pump 5 and the salt melting furnace 3. The self-circulation pipeline is communicated with the outlet of the salt pump and the salt melting furnace. The molten salt pump enables molten salt to circulate in the molten salt furnace through a self-circulation pipeline when the molten salt pump works abnormally; and when the molten salt melting furnace normally works, the high-temperature molten salt returns to the salt melting furnace from the outlet of the heat exchanger to melt solid molten salt.

And a branch pipe 24 is arranged on the molten salt output pipeline 21, the branch pipe 24 is connected with the molten salt storage tank 25, and the branch pipe 24 conveys part of molten salt to the molten salt storage tank 25. The outlet of the molten salt pump 5 is connected with the molten salt inlet 17 through a molten salt input pipeline 22.

The molten salt input pipeline 22 and the branch pipe 24 are respectively provided with a temperature tester 11, a pressure tester 12 and a flow tester 13. The three instruments are convenient to monitor the temperature, the pressure and the flow in the system.

The valves 10 are arranged on the molten salt input pipeline 22, the molten salt output pipeline 21 and the branch pipe 24. And a drain pipe is arranged at the bottom of the salt melting furnace 3, and a valve is arranged on the drain pipe. The valve is arranged to facilitate the cut-off of the flow when the operation is stopped, thereby saving the cost.

The utility model discloses avoid additionally introducing complicated natural gas combustion system, existing heat transfer medium salt in the make full use of light thermal power station has simplified the salt melting system, improves salt melting system utilization efficiency, has important using value. The system can be used for melting the fused salt when annotating salt, can further store abundant energy through the conduction oil when light and heat power station normal operating, abandon the energy of light etc. like solar energy, abandon wind. The utility model discloses this outer heat source formula salt of pipe and energy storage system's adaptability is stronger, can regard as salt and energy storage system to use, also can regard as other occasions that have the demand to melting medium and energy storage, all has important popularization and application and worth in light and heat power station technical field and other industrial fields.

The above drawings and the explanation are only a specific embodiment of the present invention, but the specific protection scope of the present invention is not limited to the above explanation, and any is within the technical idea disclosed in the present invention, and according to the technical solution of the present invention, it should be within the protection scope of the present invention to simply replace or change.

Claims

1. The system is characterized by comprising a heat exchanger (23), wherein the heat exchanger (23) comprises a shell (8), and a molten salt pipe (7) is arranged in the shell (8); one end of the molten salt pipe (7) is provided with a molten salt inlet (17), and the molten salt inlet (17) is connected with an outlet of the molten salt pump (5); the other end of the molten salt pipe (7) is provided with a molten salt outlet (18), and the molten salt outlet (18) conveys the molten salt back into the molten salt furnace (3) through a molten salt output pipeline (21); a heat source inlet (19) and a heat source outlet (20) are arranged on the shell (8); the heat source inlet (19) and the heat source outlet (20) are respectively connected with a heat source supply system (9).

2. The system according to claim 1, wherein the molten salt pump (5) is disposed above the salt melting furnace (3), and an inlet of the molten salt pump (5) extends into the salt melting furnace (3).

3. The system of claim 1, wherein the energy source in the heat source supply system (9) is one of high-temperature heat transfer oil heated by solar energy in a mirror field of a photothermal power station, high-temperature heat transfer oil heated by abandoned wind and abandoned photoelectric energy, high-temperature molten salt heated by abandoned wind and abandoned photoelectric energy, and hot air.

4. The system for melting salt and storing energy by using heat source outside the pipe as claimed in claim 1, wherein a deflector (4) is arranged in the melting salt furnace (3), and the deflectors (4) are arranged in the melting salt furnace (3) in a vertically staggered manner.

5. The system according to claim 1, wherein a self-circulation pipeline (16) is arranged between the outlet of the molten salt pump (5) and the salt melting furnace (3).

6. The system for melting salt and storing energy by using heat source outside the pipe as claimed in claim 1, wherein a branch pipe (24) is arranged on the molten salt output pipeline (21), the branch pipe (24) is connected with a molten salt storage tank (25), and the branch pipe (24) conveys part of the molten salt to the molten salt storage tank (25).

7. The system of claim 6, wherein the outlet of the molten salt pump (5) is connected to the molten salt inlet (17) via a molten salt inlet conduit (22).

8. The system of claim 7, wherein the fused salt input pipeline (22) and the branch pipe (24) are respectively provided with a temperature tester (11), a pressure tester (12) and a flow tester (13).

9. The system of claim 8, wherein valves (10) are disposed on the molten salt input pipeline (22), the molten salt output pipeline (21) and the branch pipe (24).

10. The salt melting and energy storage system with the external heat source as claimed in any one of claims 1 to 9, wherein a drain pipe is arranged at the bottom of the salt melting furnace (3), and a valve (10) is arranged on the drain pipe.