Pipe outlet heating device for liquid metal storage tank

Abstract

The utility model discloses a kind of pipeline outlet heating devices of liquid metal storage tank, belong to liquid metal pipeline transmission technical field, mainly for the pipeline heating of liquid metal storage tank.The technical problem to be solved by the utility model is to provide a kind of pipeline outlet heating devices of liquid metal storage tank, including storage tank and material pipeline;Storage tank side wall is equipped with feed inlet, material pipeline includes transport section and connecting section, and pipeline heating device for maintaining the flow of liquid metal in material pipeline is equipped on transport section, connecting section is communicated with feed inlet and the joint is equipped with for maintaining the nozzle heating device of liquid metal flow into storage tank, nozzle heating device is laid in storage tank outer wall and located feed inlet circumference.By setting the pipeline heating device for heating transport section and heating storage tank side wall and the nozzle heating device of connecting section, to control the temperature of liquid metal through pipeline and storage tank interface, so that liquid metal is smoothly entered into storage tank via pipeline, ensure that feeding is smooth.

Description

Technical Field

[0001] This utility model relates to the field of liquid metal pipeline transportation technology, and in particular to a pipeline outlet heating device for a liquid metal storage tank. Background Technology

[0002] In pipeline transport systems for low-melting-point metallic materials (such as lithium and sodium), ensuring that the material remains in a liquid state during transport is crucial for maintaining process continuity.

[0003] In existing technologies, pipeline heating methods for liquid metal materials mainly include three types: resistance heating, thermal oil heating, and electromagnetic induction heating. Resistance heating involves laying resistance wires or strips on the outer wall of the pipeline, utilizing the Joule effect when current passes through the resistance to generate heat and heat the material inside the pipeline. This technology is low-cost, but its thermal efficiency is low because heat must be conducted through the pipeline wall to the material, and the heat generated by the resistance is uneven, making it impossible to guarantee the heating temperature of the material inside the pipeline. Thermal oil heating uses thermal oil as a heat transfer medium to heat the pipeline and maintain the temperature of the fluid inside, preventing the material from solidifying due to low temperatures and becoming untransportable. However, the heating temperature of thermal oil is determined by the properties of the thermal oil and cannot meet the requirements of operating conditions above 300℃. Furthermore, it requires a complex thermal oil circulation system, resulting in high construction difficulty and maintenance costs. Electromagnetic induction heating uses alternating current to generate eddy currents in the metal wall of the pipeline, directly and efficiently heating the pipeline. It has the advantages of high electrothermal conversion efficiency and rapid heating speed.

[0004] However, at the interface between the pipeline and the storage tank, the tank wall is usually not included in the coverage of the pipeline heating system, making this area a heating blind spot. At this time, the temperature of the tank wall is significantly lower than the temperature of the material inside the pipeline. This causes the liquid metal to solidify when it enters the storage tank due to contact with the low temperature tank wall, resulting in poor fluidity or even blockage, which seriously affects the material transfer efficiency and process stability. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pipe outlet heating device for a liquid metal storage tank, which is mainly used to heat the pipe outlet of the liquid metal storage tank in order to control the temperature at the interface between the liquid metal and the storage tank, so that the liquid metal can smoothly enter the storage tank through the pipe and ensure the smoothness of the feeding.

[0006] This utility model discloses a pipeline outlet heating device for a liquid metal storage tank, comprising a storage tank and a material pipeline connected to the storage tank; the storage tank has an inlet on its side wall, and the material pipeline includes a transport section and a connecting section connected in sequence for transporting liquid metal. The transport section is provided with a pipeline heating device for maintaining the flow of liquid metal in the material pipeline. The connecting section is connected to the inlet, and a pipe opening heating device for maintaining the inflow of liquid metal into the storage tank is provided at the junction of the connecting section and the inlet. The pipe opening heating device is laid on the outer wall of the storage tank and located around the inlet.

[0007] Furthermore, the pipe heating device includes an armored heating tube, which includes a U-shaped portion snapped onto a connecting section. Both sides of the U-shaped portion are respectively connected to curved portions that circumferentially surround the feed inlet and are arranged on the outer wall of the storage tank. The other end of the curved portion is connected to a connecting portion, which is electrically connected to a relay.

[0008] As a preferred embodiment, the pipe heating device further includes fasteners for securing the armored heating pipe, the fasteners being detachably connected to the side wall of the storage tank.

[0009] As a preferred embodiment, the fastener includes a pressure plate pressed onto the curved portion, with bolts threaded to the side wall of the tank at both ends of the pressure plate.

[0010] As a preferred embodiment, a temperature sensor is provided at the joint between the connecting section and the feed inlet. The temperature sensor signal is connected to a PLC controller, and the PLC controller is electrically connected to a relay for controlling the heating of the pipe heating device.

[0011] The beneficial effects of this utility model are: the pipeline heating device of the pipeline outlet heating device of the liquid metal storage tank ensures that the liquid metal remains liquid during transportation, while the pipe inlet heating device of the connecting section prevents solidification due to temperature drop when entering the storage tank. In particular, the heating device is laid around the feed inlet to ensure uniform heating and avoid local solidification, so that the temperature of the material pipeline and the side wall of the storage tank are consistent, ensuring smooth flow of liquid metal throughout the process, avoiding pipeline blockage, and improving transportation reliability. Attached Figure Description

[0012] Figure 1 : A schematic diagram of the structure of this utility model installed on the storage tank;

[0013] Figure 2 : Schematic diagram of the armored heating tube installed at the feed inlet;

[0014] Figure 3 Temperature control system for armored heating tubes;

[0015] Reference numerals: 1-Storage tank; 11-Storage tank sidewall; 12-Inlet; 2-Material pipeline; 21-Transport section; 22-Connecting section; 23-Pipeline heating device; 3-Pipe heating device; 31-Armored heating pipe; 32-U-shaped section; 33-Bend section; 34-Connecting section; 35-Temperature sensor; 4-Fastener; 41-Pressure plate; 42-Bolt; 5-PLC controller; 51-Transmitter; 52-Relay. Detailed Implementation

[0016] The present invention will be further described below.

[0017] This utility model provides a pipe outlet heating device for a liquid metal storage tank, mainly used for heating the pipe outlet of the liquid metal storage tank. It includes a storage tank 1 and a material pipe 2 connected to the storage tank 1. The side wall of the storage tank 1 is provided with a feed inlet 12. The material pipe 2 includes a transport section 21 for transporting liquid metal and a connecting section 22 connected in sequence. The transport section 21 is provided with a pipe heating device 23 for maintaining the flow of liquid metal in the material pipe 2. The connecting section 22 is connected to the feed inlet 12. At the junction of the connecting section 22 and the feed inlet 12, a pipe outlet heating device 3 for maintaining the inflow of liquid metal into the storage tank 1 is provided. The pipe outlet heating device 3 is laid on the outer wall of the storage tank 1 and located around the feed inlet 12.

[0018] like Figure 1As shown, the side wall of the storage tank 1 has an inlet 12 for material input, which is connected to a material pipeline 2 for transporting liquid metal. The material pipeline 2 includes a transport section 21 and a connecting section 22 connected in sequence. The transport section 21 is positioned higher than the connecting section 22 so that the liquid metal can flow due to gravity through pressure difference. A pipeline heating device 23 is provided on the transport section 21 to maintain the flow of liquid metal in the material pipeline 2. The pipeline heating device 23 can be a resistance heating device, a heat transfer oil heating device, or an electromagnetic induction heating device. The connecting section 22 is connected to the inlet 12, and a pipe heating device 3 for maintaining the inflow of liquid metal into the storage tank 1 is provided at the junction of the connecting section 22 and the inlet 12. The pipe heating device 3 is laid on the outer wall of the storage tank 1 and located around the inlet 12. The pipe heating device 3 heats the side wall 11 of the storage tank around the inlet 12 and the connecting section 22 connected to the inlet 12 to ensure that the metal here is converted into liquid and to ensure smooth flow of liquid metal. The temperature of the pipe heating device 3 is set according to the properties of the liquid metal transported in the material pipeline 2. The pipeline heating device 23 of the transport section 21 of the pipeline outlet heating device of the liquid metal storage tank ensures that the liquid metal remains liquid during transportation, while the pipe inlet heating device 3 of the connecting section 22 prevents solidification due to temperature drop when entering the storage tank 1. Especially when laid around the feed inlet 12, it ensures uniform heating and avoids local solidification, so that the temperature of the material pipeline 2 and the side wall 11 of the storage tank are consistent, ensuring smooth flow of liquid metal throughout the process, avoiding pipeline blockage, and improving transportation reliability.

[0019] Specifically, the pipe heating device 3 can be an electromagnetic induction heating device, which is set around the feed inlet 12 and connected to the connecting section 22; or it can be a device with resistance wire passing through ceramic beads for heating. This structure transfers the heat generated by the resistance wire through the ceramic beads to the tank side wall 11 and the connecting section 22, so as to uniformly heat the tank side wall 11 around the feed inlet 12 and the connection point between the connecting section 22 and the feed inlet 12. However, both the electromagnetic induction heating device and the resistance wire passing through ceramic beads heating device need to be fixed at the connection point between the feed inlet 12 and the connecting section 22 using brackets and fixing devices during installation to avoid poor contact with the tank side wall 11 during use, which would result in poor heating effect on the tank side wall 11. In addition, the electromagnetic induction heating device requires an additional heating power supply, which increases the operating cost. The ceramic beads of the resistance wire passing through ceramic beads heating device are not easy to protect during installation and are easily damaged, resulting in uneven heating.

[0020] To facilitate the installation of the pipe heating device 3 and ensure uniform heating of the tank sidewall 11 by the pipe heating device 3, such as Figure 1 , Figure 2As shown, the pipe heating device 3 includes an armored heating tube 31. The armored heating tube 31 includes a U-shaped portion 32 that is snapped onto the connecting section 22. Two curved portions 33, circumferentially surrounding the feed inlet 12 and arranged on the outer wall of the storage tank 1, are connected to both sides of the U-shaped portion 32. The other end of the curved portion 33 is connected to a connecting portion 34, which is electrically connected to a relay 52. ​​The armored heating tube 31 is flexible and can be bent and fixed. The U-shaped portion 32 has an opening facing downwards and its size is adapted to the connecting section 22, used to clamp the armored heating tube 31 onto the connecting section 22. To ensure that the armored heating tube 31 heats the storage tank sidewall 11 circumferentially around the feed inlet 12, two curved portions 33, circumferentially surrounding the feed inlet 12 and arranged on the outer wall of the storage tank 1, are connected to both sides of the U-shaped portion 32. The curved portions 33 can be configured as follows: Figure 1 , Figure 2 The structure shown can also be designed so that the curved part 33 is spirally arranged around the inlet 12 as the center, which can achieve uniform heating of the inlet 12 around the tank side wall 11. The armored heating tube 31 can be set at the junction of the connecting section 22 and the inlet 12 without the need for fixing parts. The heating temperature of the armored heating tube 31 is controlled by the relay 52 which is electrically connected to the connecting part 34, which can adapt to different liquid metal transportation. The use of armored heating tube 31 improves durability and reduces maintenance costs. The temperature distribution is uniform, which reduces the risk of local overheating. The armored heating tube 31 is directly clamped to the connecting section 22 and connected to the tank side wall 11 through the U-shaped part 32, which is convenient for installation and replacement. It is suitable for heating the pipe openings of different material pipelines 2.

[0021] To prevent the armored heating tube 31 from shifting due to vibration or environmental factors during use, the tube heating device 3 also includes a fastener 4 for fixing the armored heating tube 31. The fastener 4 is detachably connected to the tank side wall 11. This fastener 4 can be secured using existing clips, clamps, etc., and its detachable design facilitates subsequent disassembly and maintenance of the armored heating tube 31. As a preferred method, to save costs, the fastener 4 is as follows... Figure 1 As shown, the fastener 4 includes a pressure plate 41 pressed on the bent portion 33. The two ends of the pressure plate 41 are provided with bolts 42 that are threadedly connected to the side wall 11 of the storage tank. The pressure plate 41 available on site is used in conjunction with the bolts 42 to fix the bent portion 33, so as to prevent it from shifting during use and deviating from the side wall 11 of the storage tank, resulting in poor heating effect and affecting the flow of liquid metal.

[0022] To precisely control the heating temperature of the armored heating tube 31 and accurately adjust the heating power, avoiding the low accuracy and slow response of manual temperature control which can easily lead to overheating or underheating, a temperature sensor 35 is installed at the joint between the connecting section 22 and the inlet 12. The temperature sensor 35 is signal-connected to a PLC controller 5, and the PLC controller 5 is electrically connected to a relay 52 for controlling the heating of the tube heating device 3. By installing a temperature sensor 35 at the joint between the connecting section 22 and the inlet 12, the temperature at the inlet 12 can be monitored in real time. The temperature sensor 35 is transmitted via a transmitter. The PLC controller 51 converts the signal and judges the temperature, and then feeds the information back to the PLC controller 5. The PLC controller 5 controls the operation of the relay 52, thereby adjusting the heating temperature of the armored heating tube 31, so that the side wall 11 of the storage tank always maintains the same temperature as the material pipeline 2, ensuring the smooth flow of liquid metal. By adding a temperature sensor 35 and a PLC controller 5, intelligent closed-loop control is realized. The PLC controller 5 and the temperature sensor 35, together with the relay, control the heating start and stop temperature of the armored heating tube 31, realizing precise temperature regulation and reducing manual intervention costs.

Claims

1. A pipe outlet heating device for a liquid metal storage tank, comprising a storage tank (1) and a material pipe (2) connected to the storage tank (1); characterized in that: The storage tank (1) has a feed inlet (12) on its side wall. The material pipeline (2) includes a transport section (21) and a connecting section (22) connected in sequence for transporting liquid metal. The transport section (21) is provided with a pipeline heating device (23) for maintaining the flow of liquid metal in the material pipeline (2). The connecting section (22) is connected to the feed inlet (12). The connection between the connecting section (22) and the feed inlet (12) is provided with a pipe heating device (3) for maintaining the flow of liquid metal into the storage tank (1). The pipe heating device (3) is laid on the outer wall of the storage tank (1) and located around the feed inlet (12).

2. The pipeline outlet heating device for a liquid metal storage tank as described in claim 1, characterized in that: The pipe heating device (3) includes an armored heating tube (31), the armored heating tube (31) includes a U-shaped part (32) snapped onto the connecting section (22), the two sides of the U-shaped part (32) are respectively connected to a curved part (33) that is circumferentially around the feed inlet (12) and arranged on the outer wall of the storage tank (1), the other end of the curved part (33) is connected to a connecting part (34), and the connecting part (34) is electrically connected to a relay (52).

3. The pipeline outlet heating device for a liquid metal storage tank as described in claim 2, characterized in that: The pipe heating device (3) also includes a fastener (4) for fixing the armored heating pipe (31), the fastener (4) being detachably connected to the side wall of the storage tank (1).

4. The pipeline outlet heating device for a liquid metal storage tank as described in claim 3, characterized in that: The fastener (4) includes a pressure plate (41) pressed on the bend (33), and the two ends of the pressure plate (41) are provided with bolts (42) threaded to the side wall of the storage tank (1).

5. The pipeline outlet heating device for a liquid metal storage tank as described in claim 2, characterized in that: A temperature sensor (35) is provided at the joint between the connecting section (22) and the feed inlet (12). The temperature sensor (35) is connected to a PLC controller (5). The PLC controller (5) is electrically connected to a relay (52) for controlling the heating of the pipe heating device (3).

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