Continuous evaporation equipment for low-melting-point metal

Abstract

The utility model belongs to the field of hydrogen storage metal powder processing, and provides low-melting-point metal continuous evaporation equipment which comprises a vacuum melting furnace and an evaporation chamber, the vacuum melting furnace is connected with the evaporation chamber through a flow control device, the flow control device comprises a liquid supply flow channel, a thermocouple and a pouring control device, the liquid supply flow channel is arranged in a downward inclined mode, and the thermocouple is arranged in the evaporation chamber. The upper end of the liquid supply runner is connected with a crucible in the vacuum melting furnace, the lower end of the liquid supply runner is connected with the top of the evaporation chamber, the thermocouple is arranged on the periphery of the liquid supply runner, and the pouring control device is arranged at the end part of the lower end of the liquid supply runner. According to the utility model, the flow of the melt is effectively controlled through the flow control device, and accurate control is realized by simultaneously controlling the flow of the melt through a plurality of valves, so that the production efficiency and quality of hydrogen storage metal are improved; in addition, the transition bin is arranged on the feeding device, so that continuous adding of the raw materials in a vacuum state is effectively guaranteed, and continuous production is facilitated.

Description

Technical Field

[0001] The utility model relates to the processing field of hydrogen storage metal powder, in particular to a low melting point metal continuous evaporation device. Background Art

[0002] Hydrogen energy, as an efficient, pollution-free and renewable energy source, has received extensive attention. Among them, hydrogen storage technology is one of the key links in the application of hydrogen energy, and solid-state hydrogen storage materials are regarded as one of the most promising hydrogen storage technologies due to their high energy density and safety.

[0003] Among solid hydrogen storage materials, magnesium hydride (MgH2) has become a research hotspot due to its large hydrogen storage capacity and abundant raw magnesium resources. However, the preparation technology of magnesium hydride still faces many challenges. As a commonly used material preparation method, evaporation condensation preparation technology has important application value in the preparation of magnesium hydride.

[0004] For the preparation of magnesium hydride, evaporation-condensation technology has the following advantages: first, by precisely controlling the evaporation temperature and cooling rate, magnesium hydride powder with a specific particle size and morphology can be prepared; second, the evaporation-condensation process is carried out in a vacuum environment, which can effectively avoid the influence of impurities in the air on the product; finally, this technology is suitable for large-scale production and can meet the huge demand for magnesium hydride in the hydrogen energy field.

[0005] However, there are also some challenges in applying evaporation-condensation technology to the preparation of magnesium hydride. First, magnesium metal is chemically active at high temperatures and easily reacts with oxygen in the air, so the oxygen content needs to be strictly controlled during the preparation process. Secondly, evaporation-condensation preparation technology requires high equipment and operating costs, including vacuum systems, heating systems, cooling systems, etc. Finally, various parameters need to be precisely controlled during the preparation process, such as evaporation temperature, cooling rate, gas flow rate, etc., to ensure the quality and performance of the product.

[0006] The existing equipment has low flow control accuracy during the production process, has no guiding effect, is prone to liquid splashing, and splashing occurs when a failure occurs. Therefore, it is a technical problem that urgently needs to be solved. Utility Model Content

[0007] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide a low-melting-point metal continuous evaporation device which can control the molten metal flow rate and avoid splashing of the molten metal when it enters the evaporator, thereby affecting the production efficiency and quality of the hydrogen storage metal.

[0008] The technical solution of the present utility model is: a low melting point metal continuous evaporation device, including a vacuum melting furnace and an evaporation chamber. The vacuum melting furnace is connected to the evaporation chamber through a flow control device. The flow control device includes a liquid supply channel, a thermocouple, and a pouring control device. The liquid supply channel is arranged obliquely downward. The upper end of the liquid supply channel is connected to the crucible inside the vacuum melting furnace, and the lower end of the liquid supply channel is connected to the top of the evaporation chamber. The thermocouple is arranged on the periphery of the liquid supply channel, and the pouring control device is arranged at the lower end of the liquid supply channel.

[0009] The advantages of this solution are that the molten liquid in the vacuum melting furnace is controlled to flow into the evaporation chamber through the flow control device. During the flow of the molten liquid, it is controlled by multiple valves to prevent splashing when the molten liquid drips into the evaporation chamber, ensuring the fluidity and transportation safety of the molten liquid during the flow process, and enabling precise control to improve the production efficiency of hydrogen storage metals.

[0010] Furthermore, the flow control device further includes a liquid control valve rod arranged at the upper end of the liquid supply channel; the liquid control valve rod is used to control the flow of the molten liquid in the crucible into the liquid supply channel and can control the flow rate of the molten liquid.

[0011] Furthermore, the liquid control valve rod is installed at the bottom of the crucible through a valve seat, which is convenient for installing the liquid control valve rod and at the same time ensures the normal use of the liquid control valve rod so that the molten liquid can flow into the liquid supply channel.

[0012] Furthermore, a heating element is provided inside the vacuum melting furnace. The heating element is installed on the inner wall of the melting furnace and is arranged around the crucible through a base. Preferably, the heating element is an electric heating device such as resistance heating or high-frequency induction heating. The heating element is used to melt the raw material low melting point metal in the crucible, such as aluminum, magnesium, etc.

[0013] Furthermore, a feeding device is provided at the top of the vacuum melting furnace. The feeding device includes a feeding pipe, a valve, and a transition bin. The top of the transition bin is provided with an openable cover plate. The lower end of the transition bin is connected to the feeding pipe through a feeding valve. The feeding pipe extends downward into the crucible. The transition bin is connected to a vacuum pump through a pipeline, and a vacuum valve is provided on the pipeline. The setting of the transition bin facilitates the feeding device to achieve continuous feeding and can ensure the vacuum degree of the vacuum melting chamber and the raw materials, reducing the influence of the raw materials carrying air on the purity of the raw materials.

[0014] Furthermore, a flow control device support is provided outside the vacuum melting furnace. The pouring control device is installed on the support. The pouring control device is used to control a small flow control valve inside the liquid supply channel. The small flow control valve is used to control the molten liquid in the liquid supply channel to enter the diversion pipe and at the same time plays a role in controlling the flow.

[0015] Furthermore, an evaporator is provided inside the evaporation chamber. A diversion pipe is provided at the lower end of the liquid supply channel and extends into the evaporation chamber. A pouring nozzle is provided at the end of the diversion pipe. Preferably, a heat-insulating material is provided outside the diversion pipe to ensure the temperature of the molten liquid inside the diversion pipe and prevent safety accidents caused by excessive temperature of the diversion pipe. The pouring nozzle is arranged to keep the molten metal warm and limit the flow rate, reduce the flow velocity of the liquid flow, and prevent the liquid flow from dripping into the evaporator and splashing.

[0016] Furthermore, an air inlet pipe is provided on one side of the evaporation chamber, and an exhaust pipe is provided on the other side. This ensures that the gas in the air inlet pipe can combine with the metal evaporated in the evaporation chamber, thereby achieving the purpose of powder production and facilitating the guarantee of product quality and efficiency.

[0017] Furthermore, a heater is provided around the evaporator.

[0018] The utility model has the following characteristics: The control of the molten liquid flow rate is effectively achieved through the flow control device, and precise control is realized by simultaneously controlling the liquid flow rate through multiple valves, improving the production efficiency and quality of the hydrogen storage metal. In addition, the setting of the transition bin on the feeding device effectively ensures the continuous addition of raw materials in a vacuum state, facilitating continuous production.

[0019] The following further describes the detailed structure of the utility model in conjunction with the accompanying drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 - is the structural schematic diagram of the utility model;

[0021] 1 - Pouring control device, 2 - Pouring nozzle, 3 - Small flow control valve, 4 - Thermocouple, 5 - Liquid supply channel, 6 - Valve seat, 7 - Liquid control valve rod, 8 - Crucible, 9 - Heating element, 10 - Vacuum melting furnace, 11 - Bracket. Specific Embodiments

[0022] As shown in the accompanying drawings: A low-melting-point metal continuous evaporation device includes a vacuum melting furnace 10 and an evaporation chamber. The vacuum melting furnace 10 is connected to the evaporation chamber through a flow control device. The flow control device includes a liquid supply channel 5, a thermocouple 4, and a pouring control device 1. The liquid supply channel 5 is arranged to slope downward. The upper end of the liquid supply channel 5 is connected to the crucible 8 inside the vacuum melting furnace 10, and the lower end of the liquid supply channel 5 is connected to the top of the evaporation chamber. The thermocouple 4 is arranged outside the liquid supply channel 5, and the pouring control device 1 is arranged at the lower end of the liquid supply channel 5. Preferably, the pouring control device 1 is a manual or automatic control device, and the utility model adopts a hydraulic cylinder automatic control device.

[0023] Preferably, the flow control device further includes a liquid control valve rod 7 disposed at the upper end of the liquid supply channel 5; the liquid control valve rod 7 is used to control the flow of the molten liquid in the crucible 8 into the liquid supply channel 5 and can control the flow rate of the molten liquid; preferably, the liquid control valve rod 7 is installed at the bottom of the crucible 8 through a valve seat 6, which facilitates the installation of the liquid control valve rod 7 and ensures the normal use of the liquid control valve rod 7 so that the molten liquid can flow into the liquid supply channel 5.

[0024] In this solution, the flow control device controls the flow of the molten liquid in the vacuum melting furnace 10 into the evaporation chamber. During the flow of the molten liquid, it is controlled by multiple valves to prevent splashing when the molten liquid enters the evaporation chamber, ensure the fluidity and transportation safety of the molten liquid during the flow process, and can achieve precise control, thereby improving the production efficiency of the hydrogen storage metal.

[0025] In the embodiment, a heating element 9 is provided in the vacuum melting furnace 10. The heating element 9 is installed on the inner wall of the melting furnace and is disposed around the crucible 8 through a base. Preferably, the heating element 9 is an electric heating device such as resistance heating or high-frequency induction heating. The heating element 9 is used to melt the raw material low-melting-point metal in the crucible 8, such as aluminum, magnesium, etc.; the raw material of the present utility model is metal magnesium.

[0026] Preferably, a feeding device is provided at the top of the vacuum melting furnace 10. The feeding device includes a feeding pipe, a valve, and a transition bin. The top of the transition bin is provided with an openable cover plate. The lower end of the transition bin is connected to the feeding pipe through a feeding valve. The feeding pipe extends downward into the crucible 8. The transition bin is connected to a vacuum pump through a pipeline, and a vacuum valve is provided on the pipeline. The setting of the transition bin facilitates the feeding device to achieve continuous feeding and can ensure the vacuum degree of the vacuum melting chamber and the raw materials, reducing the influence of the raw materials carrying air on the purity of the raw materials.

[0027] More preferably, a flow control device support 11 is provided outside the vacuum melting furnace 10. A pouring control device 1 is installed on the support 11. The pouring control device 1 is used to control the small flow control valve 3 inside the liquid supply channel 5. The small flow control valve 3 is used to control the molten liquid in the liquid supply channel 5 to enter the diversion pipe and simultaneously plays a role in controlling the flow.

[0028] In an embodiment, an evaporator is provided in the evaporation chamber. To ensure the normal operation of the evaporator, a heater is provided around the evaporator. The heater is a high-frequency induction heater. A diversion pipe is provided at the lower end of the liquid supply flow channel 5. The diversion pipe extends into the evaporation chamber, and a pouring nozzle 2 is provided at the end of the diversion pipe. Preferably, a heat-insulating material is provided outside the diversion pipe to ensure the temperature of the molten liquid in the diversion pipe and prevent safety accidents caused by excessive temperature of the diversion pipe. The pouring nozzle 2 is arranged to keep the molten metal insulated and limit the flow rate, reduce the flow velocity of the liquid flow, and avoid splashing caused by the liquid flow dropping into the evaporator. Preferably, an air inlet pipe is provided on one side of the evaporation chamber, and an exhaust pipe is provided on the other side. In this embodiment, hydrogen is introduced into the air inlet pipe. The hydrogen is ionized at high temperature and combines with the evaporated magnesium to form magnesium hydride, thereby achieving the function of hydrogen storage. The heater ensures that the gas in the air inlet pipe can combine with the metal evaporated in the evaporation chamber, thereby achieving the purpose of powder making and facilitating the guarantee of the quality and efficiency of the product.

[0029] The utility model effectively realizes the control of the molten liquid flow rate through the flow control device, and realizes precise control by simultaneously controlling the liquid flow rate through multiple valves, improving the production efficiency and quality of the hydrogen storage metal. In addition, the setting of the transition bin on the feeding device effectively ensures the continuous addition of raw materials in a vacuum state, facilitating continuous production.

[0030] The above is the preferred embodiment of the utility model and the technical principles applied. For those skilled in the art, any obvious changes such as equivalent transformation and simple substitution based on the technical solution of the utility model without departing from the spirit and scope of the utility model shall fall within the protection scope of the utility model.

Claims

1. A low-melting-point metal continuous evaporation device, comprising a vacuum melting furnace and an evaporation chamber, the vacuum melting furnace and the evaporation chamber are connected by a flow control device, and it is characterized in that: The flow control device includes a liquid supply channel, a thermocouple, and a pouring control device. The liquid supply channel is arranged in a downward slope. The upper end of the liquid supply channel is connected to the crucible in the vacuum melting furnace, and the lower end of the liquid supply channel is connected to the top of the evaporation chamber. The thermocouple is arranged outside the liquid supply channel, and the pouring control device is arranged at the lower end of the liquid supply channel.

2. The low-melting-point metal continuous evaporation equipment according to claim 1, wherein: The flow control device further includes a liquid control valve rod arranged at the upper end of the liquid supply channel.

3. The low-melting-point metal continuous evaporation device according to claim 2, characterized in that: The liquid control valve rod is installed at the bottom of the crucible through a valve seat.

4. The low-melting-point metal continuous evaporation device according to claim 1, characterized in that: A heating element is arranged in the vacuum melting furnace. The heating element is installed on the inner wall of the melting furnace and is arranged outside the crucible through a base.

5. The low-melting-point metal continuous evaporation device according to claim 4, wherein: A feeding device is arranged at the top of the vacuum melting furnace. The feeding device includes a feeding pipe, a valve, and a transition bin. An openable cover plate is arranged at the top of the transition bin. The lower end of the transition bin is connected to the feeding pipe through a feeding valve. The feeding pipe extends downward into the crucible. The transition bin is connected to a vacuum pump through a pipeline, and a vacuum valve is arranged on the pipeline.

6. The low-melting-point metal continuous evaporation device according to claim 5, characterized in that: A flow control device support is arranged outside the vacuum melting furnace. The pouring control device is installed on the support. The pouring control device is used to control a small flow control valve inside the liquid supply channel.

7. The low-melting-point metal continuous evaporation device according to claim 1, characterized in that: An evaporator is arranged in the evaporation chamber. A diversion pipe is arranged at the lower end of the liquid supply channel. The diversion pipe extends into the evaporation chamber, and a pouring nozzle is arranged at the end of the diversion pipe.

8. The low-melting-point metal continuous evaporation device according to claim 7, characterized in that: An air inlet pipe is arranged on one side of the evaporation chamber, and an exhaust pipe is arranged on the other side.

9. The low-melting-point metal continuous evaporation device according to claim 7, wherein: A heater is arranged outside the evaporator.

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