Self-heating device of molten salt tank

Abstract

The invention relates to the technical field of molten salt heating, and discloses a molten salt tank self-heating device which comprises a tank body shell, the tank body shell is used for protecting and integrating an internal structure, four supporting legs are fixedly connected to the bottom of the outer wall of the tank body shell, and a heating column is fixedly connected to the bottom of the inner diameter of the tank body shell; a partition plate is fixedly connected to the inner diameter of the tank body shell, a monitoring mechanism is arranged on the left side of the tank body shell and used for monitoring the temperature and a steam cover, the steam cover is used for gathering steam, and two exhaust pipes are installed at the top of the steam cover. Molten salt is extracted from the discharging hopper at the bottom of the molten salt tank, the spiral pipe spirally surrounds the heating column, the molten salt is heated by the heating column when passing through the spiral pipe, meanwhile, the heated molten salt enters the molten salt tank from the feeding hopper, the molten salt in the molten salt tank can continuously and circularly flow, and therefore it is ensured that heating is more uniform, and the service life of the molten salt tank is prolonged. And the heating efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of molten salt heating, in particular to a molten salt tank self-heating device. Background Art

[0002] In modern industrial production, molten salt is widely used in chemical industry and solar thermal power generation due to its excellent thermal stability and heat transfer performance. Molten salt is an ideal choice for heat transfer and storage materials. It is easy to handle in the liquid state because they can flow in the solar thermal power generation system through pipes and heat exchangers. It has excellent thermal properties, high thermal stability and low material cost.

[0003] In the existing application of molten salt tank self-heating devices, molten salt is heated by resistance wires, which can only generate heat locally, making it difficult to evenly heat the molten salt in the entire molten salt tank, resulting in uneven heating of the internal molten salt and low heating efficiency. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a molten salt tank self-heating device, which solves the problems of uneven heating and low heating efficiency.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a molten salt tank self-heating device, comprising: The tank shell is used to protect and integrate the internal structure. Four supporting legs are fixedly connected to the bottom of the outer wall of the tank shell. A heating column is fixedly connected to the bottom of the inner diameter of the tank shell. A partition plate is fixedly connected to the inner diameter of the tank shell. A monitoring mechanism is arranged on the left side of the tank shell. The monitoring mechanism is used to monitor the temperature. A steam hood, the steam hood is used to gather steam, two exhaust pipes are installed on the top of the steam hood, the bottom ends of the two exhaust pipes penetrate and extend to the top of the inner wall of the steam hood, the two exhaust pipes are used to discharge steam outward, the two exhaust pipes are fixedly connected to the steam hood, and a pressure relief valve is fixedly connected to the front side of the outer wall of the steam hood; A molten salt circulation mechanism is provided, wherein the molten salt circulation mechanism is used for heating circulation of molten salt.

[0006] Preferably, the molten salt circulation mechanism includes a molten salt tank, the bottom of which is fixedly connected to a discharge hopper, the top of which is fixedly connected to a feed hopper, the top of which is fixedly connected to a conveying pipe, the bottom of which is fixedly connected to a spiral tube, and a molten salt pump is installed on the inner diameter of the tank shell.

[0007] Preferably, the monitoring mechanism includes a molten salt temperature monitor and a water temperature monitor, both of which are located on the left side of the outer wall of the tank shell, the molten salt temperature monitor is used to monitor the temperature of the molten salt, and the water temperature monitor is used to monitor the water temperature in the tank shell.

[0008] Preferably, the steam hood is located at the top of the tank shell, and the steam hood and the tank shell are fixedly connected by welding.

[0009] Preferably, the partition plate is used to separate the water in the tank shell.

[0010] Preferably, a water inlet pipe and a drain pipe are installed on the right side of the outer diameter of the tank shell, and the water inlet pipe and the drain pipe are interconnected with the tank shell.

[0011] Preferably, the molten salt pump is fixedly connected to the inner diameter of the tank shell, the output end of the molten salt pump is fixedly connected to the bottom end of the delivery pipe, and the input end of the molten salt pump is fixedly connected to the rear end of the spiral tube.

[0012] Preferably, the bottom end of the delivery pipe passes through and extends to the bottom of the partition plate, and the delivery pipe is fixedly connected to the partition plate.

[0013] Preferably, the right end of the molten salt temperature monitor passes through the tank shell and the discharge hopper in sequence and extends to the inner diameter of the discharge hopper, and the right end of the molten salt temperature monitor is fixedly connected to the discharge hopper.

[0014] Working principle: First, start the device, the heating column starts to work and generate heat, the molten salt pump runs, and the molten salt is drawn from the discharge hopper at the bottom of the molten salt tank. The molten salt enters the spiral tube. Since the spiral tube is spirally wrapped around the outside of the heating column, the molten salt fully contacts the heating column when flowing in the spiral tube, thereby being heated; The heated molten salt returns to the molten salt tank through the feed hopper, and circulates continuously. Water is added to the cavity set between the tank shell and the molten salt tank. The high-temperature molten salt in the molten salt tank directly heats the water, causing the water to heat up quickly. The steam generated during the heating process rises and is gathered by the steam hood. The steam is discharged to the outside through the two exhaust pipes on the top of the steam hood and can be used in the next step. During the entire heating process, the pressure relief valve on the front side of the outer wall of the steam hood plays a safety protection role. When the pressure in the tank is too high, the pressure relief valve automatically opens to release the pressure to avoid danger caused by excessive pressure. The molten salt temperature monitor on the left side of the tank shell monitors the temperature of the molten salt in real time, and the water temperature monitor monitors the temperature of the water in the tank shell. According to the monitored temperature data, the power of the heating column and the flow rate of the molten salt pump are adjusted to achieve precise temperature control and optimized heating; The water inlet pipe is used to inject water into the tank shell, and the drain pipe is used to discharge water to achieve water circulation and renewal.

[0015] The present invention provides a molten salt tank self-heating device, which has the following beneficial effects: 1. The present invention extracts molten salt from the discharge hopper at the bottom of the molten salt tank, and the spiral tube is spirally wound around the outside of the heating column, so that the molten salt is heated by the heating column when passing through the spiral tube. At the same time, the heated molten salt enters the molten salt tank from the feed hopper, so that the molten salt in the molten salt tank can circulate continuously, thereby ensuring more uniform heating and improving heating efficiency.

[0016] 2. The present invention sets a cavity between the tank shell and the molten salt tank, and adds water into the cavity, so that the molten salt in the molten salt tank can directly heat the water, so that the water can be heated up faster and the heat loss of the molten salt in the molten salt tank can be reduced. The steam is directly discharged through two exhaust pipes to proceed to the next step, which improves the energy utilization efficiency and shortens the heating time.

[0017] 3. The steam hood, exhaust pipe and pressure relief valve provided in the present invention can timely and effectively gather and discharge steam. The arc-shaped steam hood can collect the steam generated during the heating process to the greatest extent and avoid disorderly diffusion of steam inside the tank body. When the pressure in the tank exceeds the preset safety threshold, the pressure relief valve will open automatically and quickly to release excess pressure in time, thereby effectively avoiding the occurrence of excessive pressure in the tank, ensuring the safety and stability of the device during operation, and reducing potential safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the self-heating device of the molten salt tank of the present invention; Figure 2 It is a top view schematic diagram of the molten salt tank self-heating device of the present invention; Figure 3 It is a schematic cross-sectional view of the tank shell of the molten salt tank self-heating device of the present invention; Figure 4 It is a schematic diagram of the overall cross section of the molten salt tank self-heating device of the present invention; Figure 5 It is a schematic diagram of the molten salt circulation mechanism of the molten salt tank self-heating device of the present invention; Figure 6 It is a schematic diagram of the molten salt temperature monitor and the water temperature monitor of the molten salt tank self-heating device of the present invention.

[0019] Among them, 1. tank shell; 2. steam hood; 3. pressure relief valve; 4. exhaust pipe; 5. water inlet; 6. drain outlet; 7. support legs; 8. molten salt temperature monitor; 9. water temperature monitor; 10. molten salt tank; 11. molten salt pump; 12. spiral tube; 13. partition plate; 14. heating column; 15. feed hopper; 16. discharge hopper; 17. conveying pipe. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example: Please refer to the attached Figure 1 -Attached Figure 6 , an embodiment of the present invention provides a molten salt tank self-heating device, comprising: The tank shell 1 is used to protect and integrate the internal structure. Four supporting legs 7 are fixedly connected to the bottom of the outer wall of the tank shell 1. A heating column 14 is fixedly connected to the bottom of the inner diameter of the tank shell 1. A partition plate 13 is fixedly connected to the inner diameter of the tank shell 1. A monitoring mechanism is arranged on the left side of the tank shell 1. The monitoring mechanism is used to monitor the temperature. A steam hood 2 is used to gather steam. Two exhaust pipes 4 are installed on the top of the steam hood 2. The bottom ends of the two exhaust pipes 4 penetrate and extend to the top of the inner wall of the steam hood 2. The two exhaust pipes 4 are used to discharge steam outward. The two exhaust pipes 4 are fixedly connected to the steam hood 2. A pressure relief valve 3 is fixedly connected to the front side of the outer wall of the steam hood 2. The molten salt circulation mechanism is used for heating circulation of molten salt.

[0022] The tank shell 1 is used to protect the internal structure of the device and effectively integrate the various internal components together, providing stable support for the entire device, ensuring that it can remain stable during operation without shaking or tilting. In addition, the heating column 14 is directly seated in the tank shell 1 to heat the molten salt. The steam hood 2 is located at the top of the tank shell 1 and is connected by welding. During the heating process, the generated steam rises naturally, allowing the steam to be discharged outward through two exhaust pipes 4, and then enter the subsequent process for utilization. While effectively collecting steam, it also improves the utilization efficiency of steam, reduces energy waste, significantly improves the efficiency and uniformity of molten salt heating, and ensures the stability and quality of the molten salt during the heating process.

[0023] The molten salt circulation mechanism includes a molten salt tank 10, a discharge hopper 16 is fixedly connected to the bottom of the molten salt tank 10, a feed hopper 15 is fixedly connected to the top of the molten salt tank 10, a conveying pipe 17 is fixedly connected to the top of the feed hopper 15, a spiral tube 12 is fixedly connected to the bottom of the discharge hopper 16, and a molten salt pump 11 is installed on the inner diameter of the tank shell 1.

[0024] When the molten salt is circulated and heated, the molten salt flowing out from the discharge hopper 16 at the bottom of the molten salt tank 10 enters the spiral tube 12. The spiral tube 12 increases the residence time of the molten salt in the heating area. The thermal energy of the heating column 14 is fully received in the spiral tube 12, thereby improving the efficiency of heat exchange. Then, the molten salt returns to the molten salt tank 10 through the feed hopper 15, thereby achieving efficient and uniform heating. Moreover, the high temperature generated by the molten salt tank 10 can directly heat the water poured between the molten salt tank 10 and the tank shell 1, thereby effectively reducing heat loss and improving energy utilization.

[0025] The monitoring mechanism includes a molten salt temperature monitor 8 and a water temperature monitor 9. The molten salt temperature monitor 8 and the water temperature monitor 9 are both located on the left side of the outer wall of the tank shell 1. The molten salt temperature monitor 8 is used to monitor the temperature of the molten salt, and the water temperature monitor 9 is used to monitor the water temperature in the tank shell 1.

[0026] The molten salt temperature monitor 8 accurately measures the temperature of the molten salt in real time, and the water temperature monitor 9 synchronously monitors the water temperature in the tank shell 1. The two monitors can quickly respond to temperature changes, so that the operator can timely understand the temperature conditions inside the device and adjust the heating power operating parameters according to the monitoring data, thereby achieving precise control of the heating process and ensuring the quality and stability of molten salt heating.

[0027] The steam hood 2 is located at the top of the tank shell 1, and the steam hood 2 and the tank shell 1 are fixedly connected by welding.

[0028] The steam generated during the heating process rises and is gathered by the steam hood 2. The steam is discharged outward through the two exhaust pipes 4 at the top of the steam hood 2, and then enters the next step for utilization, effectively collecting and utilizing the steam generated by the heating, reducing energy waste and improving the comprehensive utilization rate of energy.

[0029] The partition plate 13 is used to separate the water in the tank shell 1 .

[0030] The partition plate 13 divides the interior of the tank shell 1 into different areas, making the heat exchange between water and molten salt more orderly and improving the heat transfer efficiency. At the same time, the partition plate 13 is connected to the tank shell 1 and the molten salt tank 10 by welding, making the heat exchange between water and molten salt more orderly and efficient.

[0031] A water inlet pipe 5 and a drain pipe 6 are installed on the right side of the outer diameter of the tank shell 1 , and both the water inlet pipe 5 and the drain pipe 6 are connected to the tank shell 1 .

[0032] The function of the water inlet pipe 5 is to continuously and stably inject an appropriate amount of water into the tank shell 1, while the drain pipe 6 discharges the used water in a timely manner. By reasonably controlling the inlet and outlet of water, the water temperature is ensured to be within a suitable range, thereby optimizing the heat exchange effect during the heating process.

[0033] The molten salt pump 11 is fixedly connected to the inner diameter of the tank shell 1 , the output end of the molten salt pump 11 is fixedly connected to the bottom end of the delivery pipe 17 , and the input end of the molten salt pump 11 is fixedly connected to the rear end of the spiral tube 12 .

[0034] The molten salt pump 11 is fixedly connected to the inner diameter of the tank shell 1 by fastening bolts to ensure the stability and firmness of the pump when it is running. The output end of the molten salt pump 11 is connected to the bottom end of the delivery pipe 17 by welding to effectively prevent the leakage of molten salt. At the same time, a high-temperature resistant sealing gasket is added to the connection to further enhance the sealing effect. The input end of the molten salt pump 11 is connected to the rear end of the spiral tube 12 by a clamp. The clamp is made of wear-resistant and high-temperature resistant alloy material, can withstand the pressure and friction caused by long-term operation, and is convenient for disassembly and maintenance.

[0035] The bottom end of the delivery pipe 17 passes through and extends to the bottom of the partition plate 13 , and the delivery pipe 17 is fixedly connected to the partition plate 13 .

[0036] The conveying pipe 17 and the partition plate 13 are welded to ensure the integrity and sealing of the structure and prevent the molten salt from leaking into the separated water area. The right end of the molten salt temperature monitor 8 passes through the tank shell 1 and the discharge hopper 16 in sequence and extends to the inner diameter of the discharge hopper 16 , and the right end of the molten salt temperature monitor 8 is fixedly connected to the discharge hopper 16 .

[0037] The molten salt temperature monitor 8 is in direct contact with the molten salt in the discharge hopper 16 to monitor the temperature of the molten salt, and the water temperature monitor 9 is in direct contact with the water in the tank shell 1 to monitor the water temperature.

[0038] Adding a heat-insulating layer inside the tank shell 1 can reduce heat loss and further improve energy utilization; The tank shell 1 is made of high temperature and corrosion resistant 316L stainless steel. 316L stainless steel has good strength and stability and can withstand the corrosion of high temperature and molten salt; The steam cover 2 is made of a nickel-based alloy, which can maintain stable performance in a high-temperature steam environment and prevent deformation and corrosion; The exhaust pipe 4 is made of high temperature resistant alumina ceramics, which have good thermal insulation and corrosion resistance, ensuring that the steam is discharged smoothly and the pipe is not affected by high temperature; The heating column 14 is heated by a resistance wire, the resistance wire is a tungsten high temperature resistant metal wire, and the outside is wrapped with a high temperature resistant insulating ceramic material; The partition plate 13 is made of the same 316L stainless steel as the tank shell to ensure the stability and corrosion resistance of the connection with the tank shell; The molten salt tank 10 is made of high temperature resistant titanium alloy material, and the interior of the molten salt tank 10 is coated with alumina ceramics, which can withstand the high temperature and chemical erosion of the molten salt; The discharge hopper 16 is made of high temperature resistant graphite material with good thermal conductivity and corrosion resistance. The feed hopper 15 is made of the same titanium alloy as the molten salt tank to ensure the stability and durability of the feed. The inside of the feed hopper 15 and the discharge hopper 16 are also coated with alumina ceramics. The delivery pipe 17 is made of Hastelloy alloy, which has good corrosion resistance and high temperature resistance. The supporting legs 7 are made of cast iron to support the weight of the entire device.

[0039] The water inlet pipe 5 and the drain pipe 6 are made of 304 stainless steel to ensure that the pipes are not corroded or damaged during the water transportation process.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. Molten salt tank self-heating device, characterized in that: include: A tank shell (1), the tank shell (1) being used to protect and integrate the internal structure, four supporting legs (7) being fixedly connected to the bottom of the outer wall of the tank shell (1), a heating column (14) being fixedly connected to the bottom of the inner diameter of the tank shell (1), a partition plate (13) being fixedly connected to the inner diameter of the tank shell (1), and a monitoring mechanism being provided on the left side of the tank shell (1), the monitoring mechanism being used to monitor the temperature; A steam hood (2), the steam hood (2) being used to gather steam, two exhaust pipes (4) being installed on the top of the steam hood (2), the bottom ends of the two exhaust pipes (4) both passing through and extending to the top of the inner wall of the steam hood (2), the two exhaust pipes (4) both being used to discharge steam outwards, the two exhaust pipes (4) both being fixedly connected to the steam hood (2), and a pressure relief valve (3) being fixedly connected to the front side of the outer wall of the steam hood (2); A molten salt circulation mechanism is provided, wherein the molten salt circulation mechanism is used for heating circulation of molten salt.

2. The molten salt tank self-heating device according to claim 1 is characterized in that: The molten salt circulation mechanism comprises a molten salt tank (10), the bottom end of the molten salt tank (10) is fixedly connected to a discharge hopper (16), the top end of the molten salt tank (10) is fixedly connected to a feed hopper (15), the top end of the feed hopper (15) is fixedly connected to a conveying pipe (17), the bottom end of the discharge hopper (16) is fixedly connected to a spiral tube (12), and a molten salt pump (11) is installed on the inner diameter of the tank shell (1).

3. The molten salt tank self-heating device according to claim 1 is characterized in that: The monitoring mechanism comprises a molten salt temperature monitor (8) and a water temperature monitor (9), wherein the molten salt temperature monitor (8) and the water temperature monitor (9) are both located on the left side of the outer wall of the tank shell (1), the molten salt temperature monitor (8) is used to monitor the temperature of the molten salt, and the water temperature monitor (9) is used to monitor the water temperature in the tank shell (1).

4. The molten salt tank self-heating device according to claim 1 is characterized in that: The steam hood (2) is located at the top of the tank shell (1), and the steam hood (2) and the tank shell (1) are fixedly connected by welding.

5. The molten salt tank self-heating device according to claim 1 is characterized in that: The partition plate (13) is used to separate the water in the tank shell (1).

6. The molten salt tank self-heating device according to claim 1 is characterized in that: A water inlet pipe (5) and a drain pipe (6) are installed on the right side of the outer diameter of the tank shell (1); the water inlet pipe (5) and the drain pipe (6) are both connected to the tank shell (1).

7. The molten salt tank self-heating device according to claim 2 is characterized in that: The molten salt pump (11) is fixedly connected to the inner diameter of the tank shell (1), the output end of the molten salt pump (11) is fixedly connected to the bottom end of the delivery pipe (17), and the input end of the molten salt pump (11) is fixedly connected to the rear end of the spiral tube (12).

8. The molten salt tank self-heating device according to claim 2 is characterized in that: The bottom end of the delivery pipe (17) passes through and extends to the bottom of the partition plate (13), and the delivery pipe (17) and the partition plate (13) are fixedly connected.

9. The molten salt tank self-heating device according to claim 3 is characterized in that: The right end of the molten salt temperature monitor (8) passes through the tank shell (1) and the discharge hopper (16) in sequence and extends to the inner diameter of the discharge hopper (16), and the right end of the molten salt temperature monitor (8) is fixedly connected to the discharge hopper (16).

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