Molten salt electrolysis device for producing carbon nanomaterials

Abstract

The utility model discloses a molten salt electrolysis device for producing carbon nanomaterials, and solves the problems that the electrolysis device is poor in leakproofness and easily causes CO2 leakage. A crucible (20) is arranged in the electrolytic furnace (19), a carbonate solution (21) is arranged in the crucible (20), a heat preservation layer refractory brick (23) is arranged between the outer side wall of the crucible (20) and an inner cavity of the electrolytic furnace (19), an electrolytic furnace upper end supporting plate is arranged on an upper end opening of the crucible (20), and a heat preservation cover body (4) is arranged on the electrolytic furnace upper end supporting plate on the outer side of a central through hole of the upper end supporting plate. A polar plate hanging bracket (8) is arranged in the heat preservation cover body (4), a polar plate (9) is hung on the polar plate hanging bracket (8), and the crucible (20) and the heat preservation cover body (4) form a closed space; the lower part of the polar plate (9) is soaked in the carbonate solution (21) in the crucible (20); and the molten carbonate is electrolyzed to fully decompose CO2.

Description

Technical Field

[0001] The utility model relates to a molten salt electrolysis device, in particular to a molten salt electrolysis device for producing carbon nanomaterials. Background Art

[0002] In the process of electrochemical conversion of CO2 into carbon materials using high-temperature molten salt, factors such as electrolysis temperature, electrode potential and molten salt composition will affect the morphology, pore structure and specific surface area of ​​carbon nanomaterials, and thus affect their performance and application; the existing carbonate molten salt electrolysis device has poor airtightness, which can easily lead to CO2 leakage and cause partial energy loss, directly resulting in poor forming quality of carbon nanomaterials; in addition, the existing production process for preparing carbon nanomaterials is to directly place the molten salt electrolysis plate into a crucible carrying carbonate molten salt, pass CO2 gas into the crucible, and electrolyze to obtain carbon nanomaterials. This production method has the following problems: since the plate is at room temperature before being placed in the crucible, and the temperature of the carbonate molten salt in the crucible is as high as over 700 degrees Celsius, the molten salt electrolysis plate is very easy to explode when the temperature changes suddenly, resulting in the inability to proceed with subsequent electrolysis normally. Summary of the invention

[0003] The utility model provides a molten salt electrolysis device for producing carbon nanomaterials, which solves the technical problem that the electrolysis device has poor airtightness and is prone to CO2 leakage.

[0004] The utility model solves the above technical problems through the following technical solutions:

[0005] A molten salt electrolysis device for producing carbon nanomaterials comprises an electrolytic furnace support, an electrolytic furnace is arranged on the electrolytic furnace support, a crucible is arranged in the electrolytic furnace, a carbonate solution is arranged in the crucible, a heat-insulating layer of refractory bricks is arranged between the outer wall of the crucible and the inner cavity of the electrolytic furnace, an upper end support plate of the electrolytic furnace is arranged on the upper port of the crucible, a central through hole of the upper end support plate is arranged on the upper end support plate of the electrolytic furnace, a heat-insulating cover is arranged on the upper end support plate of the electrolytic furnace outside the central through hole of the upper end support plate, a pole plate hanger is arranged in the heat-insulating cover, a pole plate is hung on the pole plate hanger, and the crucible and the heat-insulating cover form a closed and enclosed space; carbon dioxide gas is arranged in the crucible, and the lower part of the pole plate is immersed in the carbonate solution in the crucible.

[0006] The pole plate hanger is composed of a lower support plate of the lead screw, an upper support plate of the lead screw and two vertical guide rods parallel to each other. Two vertical guide rods parallel to each other are fixedly arranged on the lower support plate of the lead screw, an upper support plate of the lead screw is arranged at the top ends of the two vertical guide rods parallel to each other, a lead screw is movably arranged between the lower support plate of the lead screw and the upper support plate of the lead screw, a lead screw motor is connected to the upper end of the lead screw, a lead screw nut lifting plate is screwed on the lead screw, a pair of guide through holes are arranged on the lead screw nut lifting plate, the lead screw nut lifting plate is movably connected to the vertical guide rod through the guide through holes, a zigzag cantilever is fixedly connected to the inner side of the lead screw nut lifting plate, and a pole plate is suspended at the inner end of the zigzag cantilever.

[0007] A cantilever support cross bar is arranged in the middle of the zigzag cantilever, a cantilever support cross bar through hole is arranged at the outer end of the cantilever support cross bar, and the outer end of the cantilever support cross bar is movably sleeved on the vertical guide rod through the cantilever support cross bar through the through hole.

[0008] The utility model achieves relative sealing, fully decomposes CO2 by electrolyzing molten carbonate, reduces electrolysis energy consumption, and saves experimental costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the utility model;

[0010] Figure 2 It is a structural schematic diagram of the plate heating device of the utility model;

[0011] Figure 3 It is a structural schematic diagram of the pole plate hanger 8 of the utility model;

[0012] Figure 4 It is a structural schematic diagram of the medium frequency electric heating furnace 6 of the utility model. DETAILED DESCRIPTION

[0013] The utility model is described in detail below with reference to the accompanying drawings:

[0014] A molten salt electrolysis device for producing carbon nanomaterials, comprising an electrolytic furnace support 18, an electrolytic furnace 19 is arranged on the electrolytic furnace support 18, a crucible 20 is arranged in the electrolytic furnace 19, a carbonate solution 21 is arranged in the crucible 20, an insulation layer refractory brick 23 is arranged between the outer wall of the crucible 20 and the inner cavity of the electrolytic furnace 19, an electrolytic furnace upper end support plate is arranged on the upper end support plate of the electrolytic furnace, and a carbonate solution 21 is arranged in the crucible 20. A heat preservation cover 4 is arranged on the upper support plate of the electrolytic furnace outside the central through hole of the upper support plate, a pole plate hanger 8 is arranged in the heat preservation cover 4, and a pole plate 9 is suspended on the pole plate hanger 8, which is lowered into the crucible through the central through hole of the upper support plate, and the crucible 20 and the heat preservation cover 4 form a closed and enclosed space; carbon dioxide gas 22 is arranged in the crucible 20, and the lower part of the pole plate 9 is immersed in the carbonate solution 21 in the crucible 20.

[0015] The pole plate hanger 8 is composed of a screw lower support plate 10, a screw upper support plate 13 and two vertical guide rods 12 parallel to each other. The two vertical guide rods 12 parallel to each other are fixedly arranged on the screw lower support plate 10, and the screw upper support plate 13 is arranged at the top of the two vertical guide rods 12 parallel to each other. A screw 11 is movably arranged between the screw lower support plate 10 and the screw upper support plate 13, and a screw motor 15 is connected to the upper end of the screw 11. A screw nut lifting plate 14 is screwed on the screw 11, and a screw nut lifting plate 14 is screwed on the screw nut lifting plate 14. A pair of guide through holes are provided on it, and the screw nut lifting plate 14 is movably connected to the vertical guide rod 12 through the guide through holes, and a zigzag cantilever 16 is fixedly connected to the inner side of the screw nut lifting plate 14, and a pole plate 9 is suspended at the inner end of the zigzag cantilever 16; by controlling the screw motor 15, the screw nut lifting plate 14 is lowered, thereby driving the zigzag cantilever 16 and the pole plate 9 to descend, so that the lower part of the pole plate 9 is immersed in the carbonate solution 21, and the carbon dioxide in the electrolytic furnace is electrolyzed in the molten salt to generate carbon nanotube products.

[0016] A cantilever support cross bar 17 is arranged in the middle of the zigzag cantilever 16 , and a cantilever support cross bar through hole is arranged at the outer end of the cantilever support cross bar 17 . The outer end of the cantilever support cross bar 17 is movably sleeved on the vertical guide rod 12 through the cantilever support cross bar through hole.

[0017] Before the carbon dioxide in the electrolytic furnace is electrolyzed in the molten salt to generate carbon nanotube products, the electrode plate 9 must be heated first. The heating device includes a heating workbench bracket 1, a medium-frequency electric heating furnace 6, a electrode plate 9 and a thermal insulation cover 4. A vertically upward electric heating coil 7 is arranged on the medium-frequency electric heating furnace 6. The vertically upward electric heating coil 7 can be raised or lowered by an electrically controlled lifting bracket 5. A base plate 2 is arranged on the top surface of the heating workbench bracket 1. The base plate 2 can serve as a common supporting base for the electrode plate hanger 8 and the thermal insulation cover 4. A central through hole 3 is arranged on the base plate 2. The electric heating coil 7 can rise through the central through hole 3 to enter the top of the base plate 2. The base outside the central through hole 3 A pole plate hanger 8 is arranged on the plate 2. The pole plate hanger 8 is a vertically arranged rectangular frame composed of a lower support plate 10 for a lead screw, an upper support plate 13 for a lead screw and two vertical guide rods 12 parallel to each other. Two vertical guide rods 12 parallel to each other are fixedly arranged on the lower support plate 10 for a lead screw, an upper support plate 13 for a lead screw is arranged at the top of the two vertical guide rods 12 parallel to each other, a lead screw 11 is movably arranged between the lower support plate 10 for a lead screw and the upper support plate 13 for a lead screw, a lead screw motor 15 is connected to the upper end of the lead screw 11, and the lead screw motor 15 drives the lead screw 11 to rotate between the lower support plate 10 for a lead screw and the upper support plate 13 for a lead screw, a lead screw nut lifting plate 14 is screwed on the lead screw 11, and when the lead screw nut is lifted, the lead screw nut lifting plate 14 is screwed on the lead screw 11. When the rod 11 rotates forward, the screw nut lifting plate 14 rises upward, and when the screw 11 rotates reversely, the screw nut lifting plate 14 falls. A pair of guide through holes are provided on the screw nut lifting plate 14, and the screw nut lifting plate 14 is movably connected to the vertical guide rod 12 through the guide through holes. The vertical guide rod 12 guides the lifting of the screw nut lifting plate 14. A zigzag cantilever 16 is fixedly connected to the inner side of the screw nut lifting plate 14, and a pole plate 9 is suspended at the inner side end of the zigzag cantilever 16; the electric heating coil 7 is arranged above the base plate 2 after passing through the central through hole 3 from bottom to top, and the pole plate 9 is arranged in the electric heating coil 7; a The thermal insulation cover 4, the electric heating coil 7, the pole plate 9, the lower support plate 10 of the lead screw, the upper support plate 13 of the lead screw and the two vertical guide rods 12 are all buckled in the thermal insulation cover 4; when the medium frequency electric heating furnace 6 is started, the electric heating coil 7 preheats the pole plate 9, and the thermal insulation cover 4 plays a role of heat preservation during preheating; 2-3 "Z"-shaped cantilevers 16 can be arranged at intervals on the inner side of the lead screw nut lifting plate 14; another pole plate hanger can also be arranged on the base plate 2 on the outside of the other direction of the central through hole 3, and the structure of the other pole plate hanger is the same as that of the pole plate hanger 8. On the two hangers, one is for hanging 3 cathode plates and the other is for hanging 2 anode plates, so as to realize preheating of 5 pole plates at the same time.

Claims

1. A molten salt electrolysis device for producing carbon nanomaterials, comprising an electrolytic furnace support (18), an electrolytic furnace (19) being arranged on the electrolytic furnace support (18), a crucible (20) being arranged in the electrolytic furnace (19), and a carbonate solution (21) being arranged in the crucible (20), characterized in that: A heat-insulating layer of refractory bricks (23) is arranged between the outer wall of the crucible (20) and the inner cavity of the electrolytic furnace (19); an upper end support plate of the electrolytic furnace is arranged on the upper end port of the crucible (20); a central through hole of the upper end support plate is arranged on the upper end support plate of the electrolytic furnace; a heat-insulating cover (4) is arranged on the upper end support plate of the electrolytic furnace outside the central through hole of the upper end support plate; a pole plate hanger (8) is arranged in the heat-insulating cover (4); a pole plate (9) is hung on the pole plate hanger (8); the crucible (20) and the heat-insulating cover (4) form a closed and sealed space; carbon dioxide gas (22) is arranged in the crucible (20); and the lower part of the pole plate (9) is immersed in a carbonate solution (21) in the crucible (20).

2. A molten salt electrolysis device for producing carbon nanomaterials according to claim 1, characterized in that: The pole plate hanger (8) is composed of a screw lower support plate (10), a screw upper support plate (13) and two vertical guide rods (12) parallel to each other. The two vertical guide rods (12) parallel to each other are fixedly arranged on the screw lower support plate (10), the screw upper support plate (13) is arranged at the top of the two vertical guide rods (12) parallel to each other, and a screw (11) is movably arranged between the screw lower support plate (10) and the screw upper support plate (13). A lead screw motor (15) is connected to the upper end of the lead screw (11), a lead screw nut lifting plate (14) is screwed to the lead screw (11), a pair of guide through holes are provided on the lead screw nut lifting plate (14), the lead screw nut lifting plate (14) is movably connected to the vertical guide rod (12) through the guide through holes, a zigzag cantilever (16) is fixedly connected to the inner side of the lead screw nut lifting plate (14), and a pole plate (9) is suspended at the inner side end of the zigzag cantilever (16).

3. A molten salt electrolysis device for producing carbon nanomaterials according to claim 2, characterized in that: A cantilever support cross bar (17) is arranged in the middle of the zigzag cantilever (16), a cantilever support cross bar through hole is arranged at the outer end of the cantilever support cross bar (17), and the outer end of the cantilever support cross bar (17) is movably sleeved on the vertical guide rod (12) through the cantilever support cross bar through hole.

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