Closed self-circulation split type high-temperature green hydrogen smelting boiler and method thereof

Abstract

This invention discloses a closed-loop, self-circulating, split-type high-temperature green hydrogen iron smelting boiler and its method, relating to the field of iron smelting boiler technology. The invention includes a moving track, with a guide trough fixed to one side of the top of the moving track. A tilting assembly is installed inside the moving track, and a boiler body is fixed to the rotating end of the tilting assembly. A hydrogen fuel pipe and an inlet pipe are fixed to the upper outer wall of the boiler body, with the hydrogen fuel pipe connected to a hydrogen fuel source. A discharge pipe and an exhaust pipe are fixed to the bottom of the boiler body, and a heat insulation cylinder is fixed to the bottom of the inner wall of the boiler body. In this invention, the exhaust pipe is buried below the guide trough, fully utilizing the high-temperature waste heat during molten iron discharge to heat the exhaust pipe, thereby preheating the next batch of iron ore and reducing the energy consumption for subsequent heating to the impurity removal temperature. Furthermore, the uniform heating of the material shortens the heating and impurity removal stage.

Description

Technical Field

[0001] This invention relates to the field of iron smelting boiler technology, specifically to a closed-loop self-circulating split-type high-temperature green hydrogen iron smelting boiler and its method. Background Technology

[0002] A green hydrogen boiler is a high-temperature furnace used for smelting iron ore. It is typically made of refractory materials and can withstand extremely high temperatures. Its working principle involves burning coal or other fuels to generate heat that melts the iron ore and flux, causing the iron in the ore to separate from impurities, thus obtaining pig iron. Iron smelting boilers play a crucial role in the metallurgical industry, directly affecting the efficiency and quality of iron production.

[0003] Chinese patent CN210014651U discloses a novel iron-smelting boiler, whose structure includes a furnace body, a top cover, an insulated furnace tank, and a cooling atomizing device. This utility model, a novel iron-smelting boiler, proposes a cooling atomizing device design, solving the problems of high ambient temperature and dust during operation. Water from the tank enters the atomizing disc through a connecting pipe via a water pump. The water flows through the connecting pipe and is atomized by nozzles inside the atomizing disc. A high-speed fan at the rear propels the water mist from inside the atomizing disc outwards from the front of the support frame, where the sprayed water mist comes into contact with and absorbs dust from the surrounding air. This design also proposes an insulated furnace tank design, solving the problem of high external wall temperature and the risk of burns from accidental contact. The rock wool board has excellent heat insulation and flame-retardant properties, and the vacuum insulation board is composed of a core material and a vacuum protective surface layer, effectively preventing heat transfer caused by air convection, thus significantly reducing the thermal conductivity.

[0004] However, the current iron smelting boilers have the following problems: during the smelting process, high-temperature waste gas and radiant waste heat from molten iron are directly discharged, resulting in extremely low waste heat utilization and high overall smelting energy consumption. Since the waste heat cannot be recovered and utilized, the thermal efficiency of the smelting process is greatly reduced, and the energy of raw materials and fuels cannot be maximized, affecting production efficiency. Therefore, we propose a closed-loop self-circulating split-type high-temperature green hydrogen iron smelting boiler and its method. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler and its method, solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a closed-loop self-circulating split-type high-temperature green hydrogen iron smelting boiler, comprising a moving track, a material guide trough fixed to one side of the top of the moving track, a tilting assembly installed inside the moving track, a boiler body fixed to the rotating end of the tilting assembly, a hydrogen fuel pipe and an air inlet pipe fixed to the upper outer wall of the boiler body, the hydrogen fuel pipe being connected to a hydrogen fuel source, a material discharge pipe and an exhaust pipe fixed to the bottom of the boiler body, an insulation cylinder fixed to the bottom of the inner wall of the boiler body, a plurality of hollow melting cavities evenly distributed in a ring at the top of the insulation cylinder, an annular wave heating pipe installed inside the insulation cylinder, the annular wave heating pipe passing sequentially through the hollow melting cavities of the insulation cylinder, a filter fan fixed to the side of the moving track, an exhaust pipe fixed to the bottom of the material guide trough, one end of the exhaust pipe being connected to the outlet of the filter fan, the other end of the exhaust pipe being connected to the air inlet pipe via a metal hose, and the air inlet and exhaust pipe of the filter fan being connected via a metal hose.

[0007] According to the above technical solution, the flipping assembly includes a movable seat that is slidably installed in a moving track. Side frames are fixed on both sides of the top of the movable seat. A rotary motor is fixed on the top of one side frame. The output end of the rotary motor is fixedly connected to the boiler body. The output end of the rotary motor is the rotating end of the flipping assembly.

[0008] According to the above technical solution, a homogenizing device is provided at the boiler body. The homogenizing device includes an electric push rod fixed to the outer wall of the boiler body and a rotating cylinder rotatably installed inside the hollow melting cavity of the insulation cylinder. A connecting plate is fixed to the top of the telescopic end of the electric push rod, and a hollow column is fixed to the bottom of the connecting plate. The hollow column vertically penetrates the top of the insulation cylinder, and an I-shaped column is fixed to the bottom of the hollow column. A sliding plate is slidably installed on the outside of the I-shaped column. Several vertical rods are evenly fixed to the top circumference of the sliding plate. The vertical rods vertically penetrate the bottom of the insulation cylinder, and a fixing ring is fixed to the top of each of the vertical rods. A push plate is rotatably installed on the top of the fixing ring, and the push plate is located inside the rotating cylinder.

[0009] According to the above technical solution, a U-shaped frame is fixed on the lower outer wall of the I-shaped column, and several inclined rings are fixed vertically and evenly at equal intervals on the outer wall of the U-shaped frame, and the inclined rings are in contact with the inner wall of the boiler body.

[0010] According to the above technical solution, a limiting post is fixed on the outer wall of the hollow column, and a spiral groove is opened on the outer wall of the rotating cylinder, with the limiting post slidably installed inside the spiral groove.

[0011] According to the above technical solution, the interior of the heat insulation cylinder is provided with a flower groove for the sliding of the limiting column.

[0012] According to the above technical solution, a number of fixed blades are uniformly fixed on the inner wall of the rotating drum, and a notch for accommodating the fixed blades is provided on the outer wall of the pusher plate.

[0013] According to the above technical solution, an anti-jamming device is provided in the opening groove of the heat insulation cylinder. The anti-jamming device includes a sliding column slidably installed inside the hollow column, a protruding rod fixed to the inner wall of the opening groove of the heat insulation cylinder, and several L-shaped sliding groove plates fixed to the outer wall of the hollow column. A spring is provided between the top of the sliding column and the bottom of the connecting plate. Two of the several L-shaped sliding groove plates are grouped together. A striking rod is slidably installed between the two L-shaped sliding groove plates. Abutting posts are fixed on both sides of the striking rod, and the abutting posts pass through the sliding groove of the L-shaped sliding groove plate. The striking rod is hinged to the outer wall of the sliding column through a hinge rod. A through groove is provided on the outer wall of the hollow column for the hinge rod to move.

[0014] According to the above technical solution, the striking rod is in contact with the outer wall of the rotating cylinder, and a number of semi-circular protrusions are evenly and equidistantly fixed on the outer wall of the protrusion rod. The semi-circular protrusions of the protrusion rod are located on the movement trajectory of the contact column.

[0015] The operating method of a closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler includes the following steps: S1. Place the boiler body in a vertical position, open the furnace cover, fill the iron ore mixed with thermite into the hollow cavity of the insulation cylinder, and after filling, close the furnace cover. Heat the annular wave heating tube through the external heater. The annular wave heating tube heats the iron ore to 600 to 800 degrees to remove impurities in the iron ore. S2. Start the rotary motor. The rotary motor will drive the boiler body to rotate smoothly 90 degrees and lie horizontally and lock itself. Start the external hydrogen gas source, so that the mixed gas of hydrogen and air in a ratio of 1:33 is introduced into the boiler body, thereby raising the boiler body to 1300 degrees and maintaining the temperature for 50 minutes. The green hydrogen and iron oxide react fully to generate high-purity elemental iron. S3. After the restoration is completed, the rotary motor will drive the boiler body to flip and reset to an upright position. Then, it will push the moving seat to move along the moving track so that the discharge pipe is aligned with the guide chute. The discharge pipe will be opened and the molten iron will be discharged from the boiler body. S4. Then start the filter fan. The filter fan draws the exhaust gas from the boiler body into the exhaust pipe through the metal hose and exhaust pipe. The molten iron in the feed trough will heat the exhaust pipe below. The exhaust pipe will then pass the heated exhaust gas into the boiler body through the metal hose and air inlet pipe, and preheat the next batch of iron ore at a temperature of about 600°C. The preheating temperature can reach 420°C, which greatly reduces the energy consumption for subsequent heating. After the iron is tapped, the outlet is closed, and the boiler waits for the next round of charging and smelting.

[0016] This invention provides a closed-loop, self-circulating, split-type high-temperature green hydrogen smelting boiler and its method. It has the following beneficial effects: (1) In this invention, the exhaust pipe is buried below the feed trough, making full use of the high-temperature waste heat during the discharge of molten iron to heat the exhaust pipe, thereby preheating the next batch of iron ore and reducing the energy consumption for subsequent heating to the impurity removal temperature; on the other hand, the uniform heating of the material shortens the heating and impurity removal stage, and the overall single-wheel energy consumption is significantly reduced compared with traditional green hydrogen iron smelting equipment; at the same time, when the extension end of the electric push rod moves up and down in a small range, the push plate shakes the iron ore in the rotating drum, and the shaking process can continuously break up the iron ore material accumulation. The structure ensures that all iron ore particles are evenly exposed in the heating area of ​​the annular wave heating tube, thereby improving the overall heating rate of the iron ore material. When the boiler body is in a horizontal position, the telescopic end of the electric push rod is fully extended. The electric push rod, connecting plate, hollow column, I-shaped column, sliding plate, vertical rod, and fixing ring work together to drive the push plate to push the molten iron in the rotating drum, thereby ensuring that the molten iron can be completely discharged from the rotating drum into the boiler body. This avoids the interference of the reduction reaction caused by the mixing of new and old iron ore materials and ensures that the reduction reaction conditions of iron ore are consistent in each round.

[0017] (2) In this invention, the U-shaped frame drives the inclined ring to stir the molten iron in the boiler body. The stirring of the inclined ring can quickly balance the overall temperature of the molten iron, avoiding the problem of temperature difference between the center temperature of the molten iron and the area near the boiler body wall after reduction, and reducing the risk of molten iron cooling and solidifying at the boiler body wall. During the small up-and-down reciprocating movement of the extension end of the electric push rod, the fixed blade will push the iron ore towards the annular wave heating pipe, thereby greatly increasing the contact frequency and contact area between the iron ore particles and the surface of the annular wave heating pipe, avoiding the problem of incomplete removal of impurities from the edge of the iron ore. Subsequently, when the extension end of the electric push rod is fully extended, the rotating drum drives the fixed blade and the push plate to rotate continuously. The rotation and stirring of the fixed blade causes the molten iron to form a forced swirling flow in the rotating drum, significantly reducing the viscous resistance between the molten iron and the inner wall of the rotating drum and the surface of the fixed blade, thereby increasing the flow speed of the molten iron. This makes the relative movement between the push plate and the molten iron smoother during the pushing process, further reducing the pushing resistance.

[0018] (3) By setting up an anti-jamming device, the present invention enables the striking rod to periodically strike the rotating drum and cause the rotating drum to vibrate. The vibration of the rotating drum can shake off the residual molten iron adhering to the inner wall of the rotating drum and the surface of the fixed blade. Combined with the pushing action of the pusher and the rotation action of the rotating drum, the amount of residual molten iron is further reduced, and the yield of molten iron per round is significantly improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the entire invention. Figure 1 ; Figure 2 This is a schematic diagram of the entire invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of a partial structure of the present invention; Figure 4 This is a schematic diagram of the boiler body of the present invention; Figure 5 This is a schematic diagram of the uniform device of the present invention. Figure 1 ; Figure 6 This is a schematic diagram of the uniform device of the present invention. Figure 2 ; Figure 7 This is a schematic diagram of the uniform device of the present invention. Figure 3 ; Figure 8 This is a schematic diagram of the uniform device of the present invention. Figure 4 ; Figure 9 This is a schematic diagram of the anti-jamming device of the present invention.

[0020] In the diagram: 1. Moving track; 2. Tilting assembly; 21. Moving seat; 22. Side frame; 23. Rotary motor; 3. Boiler body; 31. Discharge pipe; 32. Hydrogen fuel pipe; 33. Inlet pipe; 34. Exhaust pipe; 4. Uniform device; 41. Electric push rod; 42. Connecting plate; 43. Hollow column; 44. I-shaped column; 45. Sliding plate; 46. Vertical rod; 47. Push plate; 48. Fixing ring; 49. U-shaped frame; 410. Inclined ring; 411. Rotary cylinder; 412. Fixing blade; 413. Spiral groove; 414. Limiting column; 5. Anti-jamming device; 51. Sliding column; 52. Protruding rod; 53. L-shaped sliding plate; 54. Striking rod; 55. Abutting column; 56. Hinge rod; 6. Filter fan; 7. Exhaust gas pipe; 8. Material guide chute; 9. Insulation cylinder; 10. Annular wave heating pipe. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0022] Please see Figure 1 - Figure 9One embodiment of the present invention is a closed-loop self-circulating split-type high-temperature green hydrogen iron smelting boiler, including a moving track 1. A guide trough 8 is fixed on one side of the top of the moving track 1. A tilting component 2 is installed inside the moving track 1. A boiler body 3 is fixed to the rotating end of the tilting component 2. A hydrogen gas pipe 32 and an air inlet pipe 33 are fixed to the upper outer wall of the boiler body 3. The hydrogen gas pipe 32 is connected to a hydrogen gas source. A discharge pipe 31 and an exhaust pipe 34 are fixed to the bottom of the boiler body 3. Both the hydrogen gas pipe 32 and the air inlet pipe 33 are equipped with opening and closing valves. A heat insulation cylinder 9 is fixed to the bottom of the inner wall of the boiler body 3. Several hollow melting cavities are evenly opened in a ring at the top of the heat insulation cylinder 9. A ring-shaped wave heating pipe 10 is installed inside the heat insulation cylinder 9, and the ring-shaped wave heating pipe 10 passes through the hollow melting cavities of the heat insulation cylinder 9 in sequence. The ring-shaped wave heating pipe 10 is connected to an external heater. The ring-shaped wave heating pipe 10 and its external heater are existing equipment for heating iron ore, and will not be discussed in detail here. As described above, a filter fan 6 is fixed to the side of the moving track 1, and an exhaust pipe 7 is fixed to the bottom of the guide trough 8. One end of the exhaust pipe 7 is connected to the outlet of the filter fan 6, and the other end of the exhaust pipe 7 is connected to the inlet pipe 33 through a metal hose. The inlet of the filter fan 6 is connected to the exhaust pipe 34 through a metal hose. The tilting assembly 2 includes a movable seat 21 that is slidably installed in the moving track 1. Side frames 22 are fixed on both sides of the top of the movable seat 21. A rotary motor 23 is fixed to the top of one side frame 22. The output end of the rotary motor 23 is fixedly connected to the boiler body 3. The output end of the rotary motor 23 is the rotating end of the tilting assembly 2. In the above structure, the exhaust pipe 7 is buried below the guide trough 8, making full use of the high-temperature waste heat when the molten iron is discharged to heat the exhaust pipe 7, thereby preheating the next batch of iron ore and reducing the energy consumption for subsequent heating to the impurity removal temperature. On the other hand, the uniform heating of the material shortens the heating and impurity removal stage, and the overall single-wheel energy consumption is significantly reduced compared with traditional green hydrogen iron smelting equipment.

[0023] A uniform distribution device 4 is installed at three locations on the boiler body 3. The uniform distribution device 4 includes an electric push rod 41 fixed to the outer wall of the boiler body 3 and a rotating cylinder 411 rotatably installed inside the hollow melting cavity of the insulation cylinder 9. A connecting plate 42 is fixed to the top of the telescopic end of the electric push rod 41, and a hollow column 43 is fixed to the bottom of the connecting plate 42. The hollow column 43 vertically penetrates the top of the insulation cylinder 9. An I-shaped column 44 is fixed to the bottom of the hollow column 43. A sliding plate 45 is slidably installed on the outside of the I-shaped column 44. Several vertical rods 46 are uniformly fixed to the top circumference of the sliding plate 45. The vertical rods 46 vertically penetrate the insulation cylinder 9. At the bottom of the heating cylinder 9, the tops of several vertical rods 46 are fixed with fixing rings 48. A pusher plate 47 is rotatably installed on the top of the fixing rings 48. The pusher plate 47 is located inside the rotating cylinder 411. Through the above structure, the pusher plate 47 can bounce the iron ore inside the rotating cylinder 411 up and down. The bouncing process can continuously break up the iron ore material accumulation structure, so that all iron ore particles are evenly exposed in the heating area of ​​the annular wave heating tube 10, thereby improving the overall heating rate of the iron ore material. Furthermore, the pusher plate 47 can completely discharge the molten iron from the rotating cylinder 411 into the boiler body 3.

[0024] A U-shaped frame 49 is fixed to the lower outer wall of the I-shaped column 44. Several inclined rings 410 are vertically and evenly fixed at equal intervals on the outer wall of the U-shaped frame 49. The inclined rings 410 are in contact with the inner wall of the boiler body 3. Through the above structure, the inclined rings 410 will stir the molten iron in the boiler body 3. The stirring of the inclined rings 410 can quickly balance the overall temperature of the molten iron, avoiding the problem of temperature difference between the center temperature of the molten iron and the area near the furnace wall of the boiler body 3 after reduction.

[0025] A limiting post 414 is fixed to the outer wall of the hollow column 43. A spiral groove 413 is provided on the outer wall of the rotating cylinder 411. The limiting post 414 is slidably installed inside the spiral groove 413. A flower groove is provided inside the heat-insulating cylinder 9 for the limiting post 414 to slide. Several fixing blades 412 are evenly fixed around the inner wall of the rotating cylinder 411. A notch is provided on the outer wall of the pusher plate 47 to accommodate the fixing blades 412. Through the above structure, the fixing blades 412 will push the iron ore towards the annular wave. The heating tube 10 significantly increases the contact frequency and contact area between the iron ore particles and the surface of the annular wave heating tube 10. Furthermore, the rotating drum 411 drives the fixed blade 412 and the pusher plate 47 to rotate continuously. The rotation and agitation of the fixed blade 412 causes the molten iron to form a forced swirling flow inside the rotating drum 411, which significantly reduces the viscous resistance between the molten iron and the inner wall of the rotating drum 411 and the surface of the fixed blade 412, thereby increasing the flow speed of the molten iron and making the relative movement between the pusher plate 47 and the molten iron smoother during the pushing process.

[0026] In use, the boiler body 3 is placed vertically, the furnace cover is opened, and iron ore mixed with aluminothermic agent is filled into the hollow melting cavity of the insulation cylinder 9 (the iron ore is placed inside the rotating cylinder 411). After filling, the furnace cover is closed, and the annular wave heating tube 10 is heated by an external heater. The annular wave heating tube 10 heats the iron ore to 600 to 800 degrees Celsius, removing impurities from the iron ore. The rotary motor 23 is started, which drives the boiler body 3 to smoothly rotate 90 degrees to lie horizontally and lock itself. The external hydrogen gas source is started, so that a mixture of hydrogen and air at a ratio of 1:33 is introduced into the boiler body 3, thereby raising the boiler body 3 to 1300 degrees Celsius and maintaining the temperature for 50 minutes for reduction. The green hydrogen and iron oxide react fully to generate high-purity elemental gas. After the molten iron is reduced, the rotary motor 23 will drive the boiler body 3 to rotate and reset to an upright position. Then, it will push the moving seat 21 to move along the moving track 1, so that the discharge pipe 31 is aligned with the guide trough 8. The discharge pipe 31 is opened, and the molten iron is discharged from the boiler body 3. Then, the filter fan 6 is started. The filter fan 6 draws the waste gas in the boiler body 3 into the waste gas pipe 7 through the metal hose and the exhaust pipe 34. The molten iron in the guide trough 8 will heat the waste gas pipe 7 below. The waste gas pipe 7 will pass the heated waste gas into the boiler body 3 through the metal hose and the air inlet pipe 33, and preheat the next batch of iron ore at a temperature of about 600°C. The preheating temperature can reach 420°C, which greatly reduces the energy consumption for subsequent heating. After the iron is tapped, the outlet is closed, waiting for the next round of charging and smelting.

[0027] During the heating of iron ore by the annular wave heating tube 10, the electric push rod 41 is activated. The telescopic end of the electric push rod 41 moves up and down in a small amplitude. The electric push rod 41 drives the I-shaped column 44 to move up and down in a reciprocating motion through the connecting plate 42 and the hollow column 43. Each time the I-shaped column 44 moves upward and its lower plate abuts against the bottom of the sliding plate 45, the I-shaped column 44 pushes the sliding plate 45 upward. The sliding plate 45 pushes the push plate 47 upward through the vertical rod 46 and the fixing ring 48. Each time the I-shaped column 44 moves downward, its lower plate no longer abuts against the bottom of the sliding plate 45. The push plate 47 moves downward under the action of the gravity of the iron ore or the pushing force of the upper plate of the I-shaped column 44 on the sliding plate 45. This reciprocating motion causes the push plate 47 to move downward within the rotating drum 411. The iron ore is agitated, which continuously breaks up the ore's aggregate structure, ensuring that all iron ore particles are evenly exposed in the heating area of ​​the annular wave heating pipe 10, thereby increasing the overall heating rate of the iron ore. Simultaneously, when the boiler body 3 is in a reclining state, the electric push rod 41 is activated again. The telescopic end of the electric push rod 41 is fully extended, and the electric push rod 41 drives the I-shaped column 44 to move through the connecting plate 42 and the hollow column 43. The lower plate of the I-shaped column 44 pushes the sliding plate 45, the vertical rod 46, and the fixing ring 48 to move the push plate 47, thereby causing the push plate 47 to push out the molten iron in the rotating drum 411. This ensures that the molten iron can be completely discharged from the rotating drum 411 into the boiler body 3, thus avoiding interference from the reduction reaction caused by the mixing of new and old iron ore and ensuring that the reduction reaction conditions of the iron ore are consistent in each round.

[0028] After the boiler body 3 changes from a horizontal to an upright position, during the small up-and-down reciprocating movement of the extension end of the electric push rod 41 in the molten iron treatment boiler body 3, the U-shaped frame 49 driven by the I-shaped column 44 will move up and down reciprocally. The U-shaped frame 49 will drive the inclined ring 410 to move up and down reciprocally as well. The inclined ring 410 will stir the molten iron in the boiler body 3. The stirring of the inclined ring 410 can quickly balance the overall temperature of the molten iron, avoiding the problem of temperature difference between the center temperature of the molten iron and the area near the furnace wall of the boiler body 3 after reduction, and reducing the risk of the molten iron cooling and solidifying at the furnace wall of the boiler body 3.

[0029] During the small-amplitude up-and-down reciprocating movement of the telescopic end of the electric push rod 41, the limiting post 414 will move up and down reciprocally. The limiting post 414 slides along the inside of the spiral groove 413, and the limiting post 414 will drive the rotating drum 411 to rotate in both directions through the spiral groove 413. The rotating drum 411 drives the fixed blade 412 to rotate, and the fixed blade 412 simultaneously drives the push plate 47 to rotate through the notch of the push plate 47. During the rotation of the fixed blade 412, it will push the iron ore towards the annular wave heating tube 10, thereby greatly increasing the contact frequency and contact area between the iron ore particles and the surface of the annular wave heating tube 10. This avoids the problem of incomplete removal of impurities from the edge of the iron ore material. Subsequently, when the telescopic end of the electric push rod 41 is fully extended, the limiting column 414 will drive the rotating drum 411 to rotate continuously through the spiral groove 413. The rotating drum 411 drives the fixed blade 412 and the push plate 47 to rotate continuously as well. The rotation and agitation of the fixed blade 412 causes the molten iron to form a forced swirling flow in the rotating drum 411, which significantly reduces the viscous resistance between the molten iron and the inner wall of the rotating drum 411 and the surface of the fixed blade 412, thereby increasing the flow speed of the molten iron. This makes the relative movement between the push plate 47 and the molten iron smoother during the pushing process, further reducing the pushing resistance.

[0030] Please see Figure 1 - Figure 9 Based on the above embodiments, in another embodiment of the present invention, an anti-jamming device 5 is provided in the opening groove of the heat insulation cylinder 9. The anti-jamming device 5 includes a sliding column 51 slidably installed inside the hollow column 43, a protruding rod 52 fixed to the inner wall of the opening groove of the heat insulation cylinder 9, and several L-shaped sliding groove plates 53 fixed to the outer wall of the hollow column 43. A spring is provided between the top of the sliding column 51 and the bottom of the connecting plate 42. Two of the several L-shaped sliding groove plates 53 are grouped together. A striking rod 54 is slidably installed between two L-shaped sliding groove plates 53. Abutting posts 55 are fixed on both sides of the striking rod 54, and the abutting posts 55 pass through the sliding groove of the L-shaped sliding groove plate 53. The striking rod 54 and the outer wall of the sliding column 51 are connected. The components are hinged together by a hinge rod 56. A through groove is provided on the outer wall of the hollow column 43 for the hinge rod 56 to move. The striking rod 54 contacts the outer wall of the rotating drum 411. Several semi-circular protrusions are evenly and equidistantly fixed on the outer wall of the protrusion rod 52. The semi-circular protrusions of the protrusion rod 52 are located on the movement trajectory of the contact column 55. With the above structure, the striking rod 54 periodically strikes the rotating drum 411 and causes the rotating drum 411 to vibrate. The vibration of the rotating drum 411 can shake off the residual molten iron adhering to the inner wall of the rotating drum 411 and the surface of the fixed blade 412. Combined with the pushing action of the pusher plate 47 and the rotation action of the rotating drum 411, the amount of residual molten iron is further reduced, and the single-round molten iron recovery rate is significantly improved.

[0031] In use, when the telescopic end of the electric push rod 41 is fully extended, the electric push rod 41 drives the hollow column 43 to move via the connecting plate 42. The hollow column 43 drives the striking rod 54 and the abutting post 55 to move along with it via the L-shaped sliding plate 53. When the abutting post 55 moves to the semi-circular protrusion position of the protrusion rod 52, the semi-circular protrusion of the protrusion rod 52 will push the abutting post 55 to drive the striking rod 54 away from the rotating drum 411. The striking rod 54 pushes the hinge rod 56 to drive the sliding column 51 to move upward. The spring corresponding to the sliding column 51 is compressed. When the protrusion rod 5... When the semi-circular protrusion of 2 no longer pushes against the column 55, under the action of the spring force corresponding to the sliding column 51, the sliding column 51 pushes the hinge rod 56 to drive the striking rod 54 to reset and move. This process repeats, so that the striking rod 54 periodically hits the rotating drum 411 and causes the rotating drum 411 to vibrate. The vibration of the rotating drum 411 can shake off the residual molten iron adhering to the inner wall of the rotating drum 411 and the surface of the fixed blade 412. Combined with the pushing action of the pusher plate 47 and the rotation action of the rotating drum 411, the amount of residual molten iron is further reduced, and the yield of molten iron in a single round is significantly improved.

[0032] It should be noted that the spring between the sliding column 51 and the connecting plate 42 is located on the outside of the boiler body 3. Therefore, the high temperature inside the boiler body 3 will not affect the spring, thus ensuring that the anti-jamming device 5 can operate stably.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A closed-loop, self-circulating, split-type high-temperature green hydrogen smelting boiler, including a moving track (1), characterized in that: A guide trough (8) is fixed to one side of the top of the moving track (1). A flipping assembly (2) is installed inside the moving track (1). A boiler body (3) is fixed to the rotating end of the flipping assembly (2). A hydrogen gas pipe (32) and an air inlet pipe (33) are fixed to the upper outer wall of the boiler body (3). The hydrogen gas pipe (32) is connected to a hydrogen gas source. A discharge pipe (31) and an exhaust pipe (34) are fixed to the bottom of the boiler body (3). A heat insulation cylinder (9) is fixed to the bottom of the inner wall of the boiler body (3). The top of the heat insulation cylinder (9) is evenly open in a ring. The device has several hollow melting cavities. The inside of the insulation cylinder (9) is provided with an annular wave heating pipe (10), and the annular wave heating pipe (10) passes through the hollow melting cavity of the insulation cylinder (9) in sequence. A filter fan (6) is fixed on the side of the moving track (1). A waste gas pipe (7) is fixed at the bottom of the guide trough (8). One end of the waste gas pipe (7) is connected to the outlet of the filter fan (6), and the other end of the waste gas pipe (7) is connected to the inlet pipe (33) through a metal hose. The inlet of the filter fan (6) is connected to the exhaust pipe (34) through a metal hose. An anti-jamming device (5) is provided in the flower slot of the heat insulation cylinder (9). The anti-jamming device (5) includes a sliding column (51) slidably installed inside the hollow column (43), a protruding rod (52) fixed to the inner wall of the flower slot of the heat insulation cylinder (9), and several L-shaped sliding groove plates (53) fixed to the outer wall of the hollow column (43). A spring is provided between the top of the sliding column (51) and the bottom of the connecting plate (42). Several L-shaped sliding groove plates (53) Two of them are grouped together. A striking rod (54) is slidably installed between the two L-shaped sliding plates (53). Abutting posts (55) are fixed on both sides of the striking rod (54), and the abutting posts (55) pass through the sliding groove of the L-shaped sliding plate (53). The striking rod (54) and the outer wall of the sliding post (51) are hinged together by a hinge rod (56). A through groove for the hinge rod (56) to move is opened on the outer wall of the hollow column (43).

2. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 1, characterized in that: The flipping assembly (2) includes a movable seat (21) that is slidably installed in the movable track (1). Both sides of the top of the movable seat (21) are fixed with side frames (22). A rotary motor (23) is fixed on the top of one side frame (22). The output end of the rotary motor (23) is fixedly connected to the boiler body (3). The output end of the rotary motor (23) is the rotating end of the flipping assembly (2).

3. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 1, characterized in that: A uniform distribution device (4) is provided at the boiler body (3). The uniform distribution device (4) includes an electric push rod (41) fixed to the outer wall of the boiler body (3) and a rotating cylinder (411) rotatably installed inside the hollow melting cavity of the insulation cylinder (9). A connecting plate (42) is fixed to the top of the telescopic end of the electric push rod (41), and a hollow column (43) is fixed to the bottom of the connecting plate (42). The hollow column (43) vertically penetrates the top of the insulation cylinder (9). 3) The bottom is fixed with an I-shaped column (44), and a sliding plate (45) is slidably installed on the outside of the I-shaped column (44). Several vertical rods (46) are evenly fixed on the top circumference of the sliding plate (45). The vertical rods (46) penetrate vertically through the bottom of the heat preservation cylinder (9). The top of each of the vertical rods (46) is fixed with a fixing ring (48). The top of the fixing ring (48) is rotatably installed with a push plate (47). The push plate (47) is located inside the rotating cylinder (411).

4. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 3, characterized in that: A U-shaped frame (49) is fixed to the lower outer wall of the I-shaped column (44). Several inclined rings (410) are fixed vertically and evenly at equal intervals on the outer wall of the U-shaped frame (49). The inclined rings (410) are in contact with the inner wall of the boiler body (3).

5. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 3, characterized in that: A limiting post (414) is fixed on the outer wall of the hollow column (43), and a spiral groove (413) is provided on the outer wall of the rotating cylinder (411). The limiting post (414) is slidably installed inside the spiral groove (413).

6. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 5, characterized in that: The interior of the heat-insulating cylinder (9) is provided with a flower groove for the sliding of the limiting column (414).

7. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 5, characterized in that: The inner wall of the rotating cylinder (411) is uniformly fixed with several fixed blades (412), and the outer wall of the push plate (47) is provided with a notch for accommodating the fixed blades (412).

8. The closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler according to claim 7, characterized in that: The striking rod (54) is in contact with the outer wall of the rotating cylinder (411). Several semi-circular protrusions are evenly and equidistantly fixed on the outer wall of the protrusion rod (52). The semi-circular protrusions of the protrusion rod (52) are located on the movement trajectory of the contact column (55).

9. A method of using a closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler, comprising the closed-loop self-circulating split-type high-temperature green hydrogen smelting boiler as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Place the boiler body (3) in a vertical position, open the furnace cover, fill the iron ore mixed with aluminothermic agent into the hollow cavity of the insulation cylinder (9), and after filling, close the furnace cover and heat the annular wave heating pipe (10) through the external heater. The annular wave heating pipe (10) heats the iron ore to 600 to 800 degrees to remove impurities in the iron ore. S2. Start the rotary motor (23). The rotary motor (23) will drive the boiler body (3) to rotate smoothly 90 degrees and lie horizontally and lock itself. Start the external hydrogen gas source, so that the mixed gas of hydrogen and air with a mixing ratio of 1:33 is introduced into the boiler body (3), so that the boiler body (3) is heated to 1300 degrees and kept at a constant temperature for 50 minutes. The green hydrogen and iron oxide react fully to generate high-purity elemental iron. S3. After restoration, the rotary motor (23) will drive the boiler body (3) to flip and reset to an upright state, and then push the moving seat (21) to move along the moving track (1) so that the discharge pipe (31) is aligned with the guide trough (8), and the discharge pipe (31) is opened so that the molten iron is discharged from the boiler body (3). S4. Then start the filter fan (6). The filter fan (6) draws the exhaust gas in the boiler body (3) into the exhaust pipe (7) through the metal hose and exhaust pipe (34). The molten iron in the feed trough (8) will heat the exhaust pipe (7) below. The exhaust pipe (7) will pass the heated exhaust gas into the boiler body (3) through the metal hose and air inlet pipe (33) and preheat the next batch of iron ore at a temperature of about 600°C. The preheating temperature can reach 420°C, which greatly reduces the energy consumption of subsequent heating. After the iron is tapped, the outlet is closed and the next round of charging and smelting is waited for.

Images