A feeding and discharging device for a hydrogen reduction furnace

Abstract

The present invention relates to the technical field of hydrogen reduction furnaces, and specifically relates to a feeding and discharging device for a hydrogen reduction furnace, including a hydrogen reduction furnace; a feeding mechanism for feeding raw material particles; a gas treatment mechanism for treating raw material gases; a blanking mechanism for blanking product particles; the feeding mechanism is arranged at the top of the hydrogen reduction furnace, the gas treatment mechanism is arranged inside the feeding mechanism, and the blanking mechanism is arranged at the bottom of the hydrogen reduction furnace. The provided inlet pipe can increase the flow rate of the gas by narrowing the pipe orifice, and then be driven by the air flow at the orifice of the inlet pipe, so that the sealing plate can automatically rotate and switch to different feeding channels. At the same time, the rotating sealing frame can control the amount of gas introduced into the feeding channel, thereby avoiding waste caused by excessive gas. The provided gas treatment mechanism can treat the raw materials. Through the sealing plate, inert gas can be introduced into the raw materials in the feeding channel to squeeze out the air in the gaps between the raw materials, thereby improving the safety performance.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen reduction furnaces, and particularly to a feeding and discharging device for a hydrogen reduction furnace. Background Art

[0002] A hydrogen reduction furnace is an important heat treatment device, which is widely used in fields such as metallurgy, chemical industry, building materials, and electronics industry. A hydrogen reduction furnace refers to a device that reduces materials such as metals and ceramics by heating hydrogen. Its principle is to utilize the strong reducibility of hydrogen at high temperatures to reduce metal ions or other ions to pure metals or alloys. Specifically, at high temperatures, hydrogen reacts with metal oxides or other compounds to produce the required metals or compounds and water vapor.

[0003] However, since the raw materials are solids, there are inevitably certain gaps between the raw material particles, and the air in the external environment will fill the gaps and enter the hydrogen reduction furnace along with the raw materials. Since there is oxygen in the air, if the raw material particles are too loose and too much air is mixed in, it will cause a decrease in the hydrogen concentration inside the hydrogen reduction furnace, and then lead to an explosion risk. In view of this, we propose a feeding and discharging device for a hydrogen reduction furnace. Summary of the Invention

[0004] The purpose of the present invention is to provide a feeding and discharging device for a hydrogen reduction furnace, which solves the problems mentioned in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A feeding and discharging device for a hydrogen reduction furnace, comprising a hydrogen reduction furnace;

[0007] A feeding mechanism for feeding raw material particles;

[0008] A gas treatment mechanism for treating raw material gases;

[0009] A blanking mechanism for blanking product particles;

[0010] The feeding mechanism is arranged at the top of the hydrogen reduction furnace, the gas treatment mechanism is arranged inside the feeding mechanism, and the blanking mechanism is arranged at the bottom of the hydrogen reduction furnace;

[0011] The gas treatment mechanism includes a sealing ring, the sealing ring is fixedly connected to the outside of the feed pipe, a sealing frame is rotatably connected to the inside of the sealing ring, a sealing plate is fixedly connected to the top of the sealing frame, an inlet pipe is fixedly connected to the outside of the sealing ring, the inlet pipe is inclined, the inlet pipe is in mutual communication with the inside of the sealing ring, and the sealing plate can rotate with the sealing frame to make the inert gas inside the sealing ring flow into different feed channels of the feeding mechanism.

[0012] Preferably, the feeding mechanism includes a feeding pipe fixedly connected to the middle of the top end of the hydrogen reduction furnace. A support rod is fixedly connected to the middle inside the feeding pipe, and a partition plate is fixedly connected to the side of the support rod. Independent feeding channels are formed between the partition plates, and both ends of the feeding channels communicate with both ends of the feeding pipe respectively.

[0013] Preferably, electromagnetic valves are fixedly connected to both the upper end and the lower end of the feeding pipe. A guiding plate is fixedly connected to the top end of the support rod, and the guiding plate has a hemispherical structure.

[0014] Preferably, a driving plate is fixedly connected to the sealing frame. The driving plate is arranged around the sealing frame and has a bowl-shaped structure, and the concave surface of the driving plate corresponds to the axial direction of the air inlet pipe.

[0015] Preferably, the sealing plate has a "Z" - shaped structure. The sealing plate includes a vertical plate, a first horizontal plate perpendicular to the vertical plate, and a second horizontal plate. The first horizontal plate is fixedly connected to the top end of one side of the vertical plate, and the second horizontal plate is fixedly connected to the bottom end of the other side of the vertical plate. The vertical plate is of an arc structure and the arc is similar to the inner arc of the feeding pipe.

[0016] Preferably, the inside of the sealing plate is a hollow structure. Through holes are opened at the bottoms of both the first horizontal plate and the second horizontal plate. The inside of the sealing plate communicates with the inside of the sealing frame through the through holes, and the bottom of the second horizontal plate is in contact with the top of the partition plate.

[0017] Preferably, the discharging mechanism includes a discharging pipe fixedly connected to the bottom end of the hydrogen reduction furnace. Strip-shaped air channels are fixedly connected to both sides of the discharging pipe, and the strip-shaped air channels are symmetrically connected to both sides of the discharging pipe.

[0018] Preferably, the strip-shaped air channels are connected to a first air pump and a second air pump through pipes. Both the first air pump and the second air pump are fixedly connected to the hydrogen reduction furnace, and the first air pump communicates with the sealing frame through an air inlet pipe.

[0019] Preferably, an exhaust gas recovery tank is fixedly connected to the side of the hydrogen reduction furnace. Both the air inlet end and the air outlet end of the first air pump communicate with the exhaust gas recovery tank through a recovery pipe, and two electromagnetic valves are respectively arranged on the recovery pipe and the air inlet pipe.

[0020] By means of the above technical solution, the feeding and discharging device for a hydrogen reduction furnace provided by the present invention has at least the following beneficial effects:

[0021] (1) By setting the intake pipe, the present invention can increase the flow rate of the gas by narrowing the pipe orifice, and then use the airflow at the orifice of the intake pipe to drive the driving plate and the sealing frame, so that the sealing plate can automatically rotate and switch to different feeding channels. At the same time, the rotating sealing frame can conveniently control the amount of gas introduced into the feeding channel, thereby avoiding waste caused by excessive gas.

[0022] (2) By setting the gas treatment mechanism, the present invention can perform gas treatment operations on the raw materials. Through the sealing plate, inert gas can be introduced into the raw materials in the feeding channel to squeeze out the air in the gaps between the raw materials, thereby improving the safety performance during the feeding of the raw materials.

[0023] (3) By setting the blanking mechanism, the present invention can form a gas barrier at the orifice of the blanking pipe to isolate the inside of the hydrogen reduction furnace from the external environment, thereby reducing the safety hazards caused by the leakage of high-temperature hydrogen inside the hydrogen reduction furnace. At the same time, while preventing gas leakage, it can also reduce the heat loss caused by the gas transferring the heat inside the furnace to the outside. Description of the Drawings

[0024] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application:

[0025] Figure 1 It is a schematic structural diagram of the present invention;

[0026] Figure 2 It is a schematic internal structure diagram of the feeding pipe of the present invention;

[0027] Figure 3 It is a schematic internal structure diagram of the feeding mechanism of the present invention;

[0028] Figure 4 It is a schematic structural diagram of the gas treatment mechanism of the present invention;

[0029] Figure 5 It is a schematic internal structure diagram of the gas treatment mechanism of the present invention;

[0030] Figure 6 It is a schematic structural diagram of the sealing frame of the present invention.

[0031] In the figure: 1. Hydrogen reduction furnace; 2. Feeding mechanism; 21. Feeding pipe; 22. Support rod; 23. Spacer plate; 24. Feeding channel; 25. Guide plate; 3. Gas treatment mechanism; 31. Sealing ring; 32. Intake pipe; 33. Sealing frame; 34. Driving plate; 35. Sealing plate; 351. Vertical plate; 352. First horizontal plate; 353. Second horizontal plate; 354. Through hole; 4. Blanking mechanism; 41. Blanking pipe; 42. Strip-shaped air duct; 43. First air pump; 44. Second air pump; 45. Waste gas recovery tank; 46. Recovery pipeline. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0033] A feeding and discharging device for a hydrogen reduction furnace, as Figures 1 - 3 shown, includes a hydrogen reduction furnace 1; a feeding mechanism 2 is arranged at the top end of the hydrogen reduction furnace 1 for feeding raw material particles.

[0034] Specifically, the feeding mechanism 2 includes a feeding pipe 21. The feeding pipe 21 is fixedly connected to the middle of the top end of the hydrogen reduction furnace 1, and the feeding pipe 21 can feed raw materials. A support rod 22 is fixedly connected to the middle inside the feeding pipe 21. A partition plate 23 is fixedly connected to the side of the support rod 22. Independent feeding channels 24 are formed between the partition plates 23, and both ends of the feeding channels 24 are respectively communicated with both ends of the feeding pipe 21. The partition plate 23 divides the feeding pipe 21 into multiple feeding channels 24 with similar structures. At the same time, the partition plate 23 separates the adjacent feeding channels 24 to make the feeding channels 24 independent of each other. At the same time, both the partition plate 23 and the support rod 22 are fixedly connected to the feeding pipe 21. The feeding channel 24 connected to the feeding pipe 21 at the top end can perform a shunting operation on the raw materials during feeding, and at the same time, the feeding channel 24 communicated with the feeding pipe 21 at the bottom can feed the raw materials that have completed gas treatment into the hydrogen reduction furnace 1 from the bottom of the feeding pipe 21.

[0035] In addition, electromagnetic valves are fixedly connected to both the upper end and the lower end of the feeding pipe 21. The electromagnetic valves can control the opening and closing of the upper end and the lower end of the feeding pipe 21. A guiding plate 25 is fixedly connected to the top end of the support rod 22. The guiding plate 25 has a hemispherical structure. The guiding plate 25 can guide the fed raw material particles, so that the raw material particles can slide along the guiding plate 25, thereby avoiding the accumulation of raw material particles at the top end of the support rod 22. At most one of the two electromagnetic valves is opened simultaneously. Embodiment

[0036] As Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 shown, on the basis of Embodiment 1, a gas treatment mechanism 3 is arranged inside the feeding mechanism 2 for gas treatment of raw materials.

[0037] In this embodiment, the gas treatment mechanism 3 includes a sealing ring 31. The sealing ring 31 is fixedly connected to the outer side of the feed pipe 21. A sealing frame 33 is rotatably connected to the inner side of the sealing ring 31. The structure of the sealing ring 31 can support the sealing frame 33, facilitating the rotation of the sealing frame 33 inside the sealing ring 31. A sealing plate 35 is fixedly connected to the top of the sealing frame 33. The bottom of the sealing plate 35 is in contact with the top of the spacer plate 23. The fixedly connected sealing plate 35 can slide on the top of the spacer plate 23 when rotating with the sealing frame 33, so as to slide and switch on the tops of different spacer plates 23, achieving the sealing effect on different feed channels 24.

[0038] It should be noted that an air inlet pipe 32 is fixedly connected to the outer side of the sealing ring 31. The air inlet pipe 32 is inclined. The air inlet pipe 32 is in communication with the inside of the sealing ring 31. The air inlet pipe 32 can conduct air intake operation into the cavity between the sealing ring 31 and the sealing frame 33, filling the inside of the sealing ring 31 with inert gas, and passing the gas into the intake channel through the sealing plate 35, using the inert gas to squeeze out the air in the gaps between the raw materials, improving the safety performance of raw material feeding.

[0039] On this basis, a driving plate 34 is fixedly connected to the sealing frame 33. The driving plate 34 is arranged around the sealing frame 33. The driving plate 34 has a bowl-shaped structure, and the concave surface of the driving plate 34 corresponds to the axial direction of the air inlet pipe 32. The driving plates 34 arranged around are equidistantly arranged. The number of air inlet pipes 32 is at least three. The air inlet pipes 32 are connected around the sealing ring 31. The air inlet pipes 32 are non-equidistantly arranged, and the distances between the air inlet pipes 32 and the driving plate 34 are all different. The air inlet pipe 32 can impact the driving plate 34 through the high-speed airflow at the end of the pipe orifice, driving the sealing frame 33 to rotate in cooperation with the driving plate 34 similar to a wind cup. At the same time, due to the friction between the sealing frame 33 and the sealing ring 31, the rotation speed of the sealing frame 33 remains low. Since the distances between the air inlet pipes 32 and the driving plate 34 are all different, when the driving plate 34 rotates, the driving plate 34 can alternately approach the end of the air inlet pipe 32, thus avoiding the problem that the air flow velocity is insufficient to drive the sealing frame 33 because the driving plate 34 simultaneously moves away from the air inlet pipe 32. The side of the driving plate 34 away from the air inlet pipe 32 can be made of a water-absorbing material.

[0040] It should be noted that the sealing plate 35 is in a "Z" - shaped structure. The sealing plate 35 includes a vertical plate 351, a first horizontal plate 352 perpendicular to the vertical plate 351, and a second horizontal plate 353. The first horizontal plate 352 is fixedly connected to the top end of one side of the vertical plate 351, and the second horizontal plate 353 is fixedly connected to the bottom end of the other side of the vertical plate 351. The vertical plate 351 is in an arc - shaped structure and the arc is similar to the inner arc of the feed pipe 21. The inside of the sealing plate 35 is a hollow structure. Through - holes 354 are opened at the bottoms of both the first horizontal plate 352 and the second horizontal plate 353. The inside of the sealing plate 35 is interconnected with the inside of the sealing frame 33 through the through - holes 354. The bottom of the second horizontal plate 353 is in contact with the top of the spacer plate 23. The sealing plate 35 can introduce the gas inside the sealing ring 31 into the feed channel 24. As the residual gas of the driving sealing ring 31 continues to accumulate, the gas pressure inside the sealing ring 31 continues to increase and finally is introduced into the feed channel 24 through the sealing plate 35. Embodiment

[0041] As Figures 1 - 3 shown, on the basis of Embodiment 2, a blanking mechanism 4 is provided at the bottom end of the hydrogen reduction furnace 1 for blanking the product particles.

[0042] In this embodiment, the blanking mechanism 4 includes a blanking pipe 41. The blanking pipe 41 is fixedly connected to the bottom end of the hydrogen reduction furnace 1 and can blank the reaction products. Two strip - shaped air channels 42 are fixedly connected to both sides of the blanking pipe 41. The strip - shaped air channels 42 are symmetrically connected to both sides of the blanking pipe 41. The strip - shaped air channels 42 are connected to an air pump 43 and an air pump 44 through pipes. Both the air pump 43 and the air pump 44 are fixedly connected to the hydrogen reduction furnace 1. The air pump 43 is interconnected with the sealing frame 33 through an air inlet pipe 32. The strip - shaped air channels 42 can use the air pump 43 and the air pump 44 to form an air curtain in the air between the strip - shaped air channels 42, thereby isolating the hydrogen reduction furnace 1 from the external environment. The air pump 44 is externally connected to a gas storage device through a pipe, so that the inert gas stored in the gas storage device can be pumped into the strip - shaped air channels 42.

[0043] In addition, an exhaust gas recovery tank 45 is fixedly connected to the side of the hydrogen reduction furnace 1. Both the air inlet end and the air outlet end of the air pump 43 are interconnected with the exhaust gas recovery tank 45 through a recovery pipe 46. Two solenoid valves are provided on each of the recovery pipe 46 and the air inlet pipe 32. The exhaust gas recovery tank 45 can recover the inert gas, which is convenient for the subsequent reuse of the inert gas.

[0044] When the feeding and discharging device for a hydrogen reduction furnace of the present invention is in use, when a feeding operation is required, first, the solenoid valve at the top of the feeding pipe 21 is opened and the solenoid valve at the bottom of the feeding pipe 21 is kept closed. Subsequently, raw material particles are introduced from the top of the feeding pipe 21, and the raw materials then enter the interiors of different feeding channels 24. Then, the first air pump 43, the solenoid valve on the recovery pipeline 46 at the air intake end of the first air pump 43, and the solenoid valve on the air inlet pipe 32 at the exhaust end of the first air pump 43 are opened. The first air pump 43 then pumps the gas inside the recovery pipeline 46 into the sealing ring 31. When the gas sprays out from the end of the air inlet pipe 32, it directly impacts the driving plate 34. The driving plate 34 with a bowl-shaped structure drives the sealing frame 33 to rotate under the impact of the high-speed air flow. The rotating driving plate 34 is alternately impacted by the air flow inside the air inlet pipe 32 to maintain uniform rotation. When the driving plate 34 rotates, it drives the sealing plate 35 to rotate slowly through the sealing frame 33. The sealing plate 35 then rotates and switches at the tops of different feeding channels 24. At the same time, after the inert gas impacts into the sealing ring 31 along with the air flow, the gas pressure inside the sealing ring 31 continuously increases and flows into the feeding channels 24 through the sealing plate 35. The inert gas flowing into the interiors of the feeding channels 24 then flows into the gaps between the raw material particles and extrudes the air between the raw material particles. The continuously slowly rotating sealing plate 35 can, on the one hand, quantify the gas injected into the interiors of the feeding channels 24 to avoid waste caused by excessive gas injection, and on the other hand, automatically switch between different feeding channels 24. Since the ends of the feeding channels 24 are all interconnected, therefore, after the feeding channels 24 are filled with gas, the residual air is extruded from the adjacent feeding channels 24.

[0045] When the gas treatment operation of the raw materials is completed, the solenoid valve at the top of the feeding pipe 21 can be closed to prevent the entry of external air, and at the same time, the escape of hydrogen inside the hydrogen reduction furnace 1 can also be reduced. Then, the solenoid valve at the bottom of the feeding pipe 21 is opened to feed the raw materials into the hydrogen reduction furnace 1.

[0046] When the product is discharged from the blanking pipe 41, the second air pump 44 pumps the inert gas in the gas storage device into the strip-shaped air duct 42. At the same time, the first air pump 43 and the solenoid valves on the recovery pipeline 46 at the exhaust end of the first air pump 43 and the solenoid valves on the intake pipe 32 at the intake end of the first air pump 43 are opened. The inert gas then forms a gas barrier between the strip-shaped air ducts 42 and isolates the inside of the hydrogen reduction furnace 1 from the external environment, reducing the heat exchange between the inside of the hydrogen reduction furnace 1 and the external environment. At the same time, the inert gas barrier can also reduce the escape of high-temperature hydrogen inside the hydrogen reduction furnace 1 during the raw material blanking process. If the pre-feed operation is carried out while blanking, the solenoid valves on the recovery pipeline 46 can be closed and the solenoid valves on the intake pipe 32 can be opened. At this time, the first air pump 43 can directly introduce the recovered inert gas into the inside of the feed channel 24. When the gas curtain formed by the high-speed air flow blows over the surface of the product, it blows away the heat on the surface of the product, preheating the raw material with the waste heat of the product while cooling and reducing the temperature of the product.

[0047] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0048] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A feeding and unloading device for a hydrogen reduction furnace, characterized in that: It comprises a hydrogen reduction furnace (1); A feeding mechanism (2) for feeding raw material particles; A gas processing mechanism (3) is used to process the air between the raw materials; A feeding mechanism (4) for feeding product particles; The feeding mechanism (2) is arranged at the top of the hydrogen reduction furnace (1), the gas processing mechanism (3) is arranged inside the feeding mechanism (2), and the unloading mechanism (4) is arranged at the bottom of the hydrogen reduction furnace (1); The gas processing mechanism (3) comprises a sealing ring (31), the sealing ring (31) being fixedly connected to the outside of the feed pipe (21), the sealing frame (33) being rotatably connected to the inside of the sealing ring (31), the top of the sealing frame (33) being fixedly connected to a sealing plate (35), the outside of the sealing ring (31) being fixedly connected to an air intake pipe (32), the air intake pipe (32) being arranged at an angle, the air intake pipe (32) being communicated with the inside of the sealing ring (31), and the sealing plate (35) being rotatable with the sealing frame (33) so that the inert gas inside the sealing ring (31) flows into different feed channels (24) of the feed mechanism (2).

2. A feeding and unloading device for a hydrogen reduction furnace according to claim 1, characterized in that: The feeding mechanism (2) comprises a feeding pipe (21), the feeding pipe (21) being fixedly connected to the middle of the top of the hydrogen reduction furnace (1), a support rod (22) being fixedly connected to the middle of the inside of the feeding pipe (21), a partition plate (23) being fixedly connected to the side of the support rod (22), and mutually independent feeding channels (24) being formed between the partition plates (23), and two ends of the feeding channel (24) are respectively connected to two ends of the feeding pipe (21).

3. A feeding and unloading device for a hydrogen reduction furnace according to claim 2, characterized in that: The upper and lower ends of the feed pipe (21) are both fixedly connected to electromagnetic valves, and the top end of the support rod (22) is fixedly connected to a guide plate (25), wherein the guide plate (25) is in a hemispherical structure.

4. A feeding and unloading device for a hydrogen reduction furnace according to claim 1, characterized in that: A driving plate (34) is fixedly connected to the sealing frame (33). The driving plate (34) is disposed around the sealing frame (33). The driving plate (34) is in a bowl-shaped structure, and the concave surface of the driving plate (34) corresponds to the axial direction of the air intake pipe (32).

5. The feeding and unloading device for a hydrogen reduction furnace according to claim 1, characterized in that: The sealing plate (35) has a "Z"-shaped structure, and comprises a vertical plate (351) and a horizontal plate 1 (352) and a horizontal plate 2 (353) which are perpendicular to the vertical plate (351). The horizontal plate 1 (352) is fixedly connected to the top end of one side of the vertical plate (351), and the horizontal plate 2 (353) is fixedly connected to the bottom end of the other side of the vertical plate (351). The vertical plate (351) is an arc-shaped structure, and the arc is similar to the arc of the inner side of the feed pipe (21).

6. A feeding and unloading device for a hydrogen reduction furnace according to claim 5, characterized in that: The interior of the sealing plate (35) is a hollow structure. The bottoms of the first transverse plate (352) and the second transverse plate (353) are both provided with through holes (354). The interior of the sealing plate (35) is communicated with the inner side of the sealing frame (33) via the through holes (354). The bottom of the second transverse plate (353) is arranged to abut against the top of the spacer plate (23).

7. The feeding and unloading device for a hydrogen reduction furnace according to claim 1, characterized in that: The material discharge mechanism (4) comprises a material discharge pipe (41), the material discharge pipe (41) being fixedly connected to the bottom end of the hydrogen reduction furnace (1), strip-shaped air passages (42) being fixedly connected to both sides of the material discharge pipe (41), and the strip-shaped air passages (42) being symmetrically connected to both sides of the material discharge pipe (41).

8. A feeding and unloading device for a hydrogen reduction furnace according to claim 7, characterized in that: The strip-shaped air channel (42) is connected to an air pump 1 (43) and an air pump 2 (44) via a pipeline; the air pump 1 (43) and the air pump 2 (44) are both fixedly connected to the hydrogen reduction furnace (1); the air pump 1 (43) is in communication with the sealing frame (33) via an air inlet pipe (32).

9. A feeding and unloading device for a hydrogen reduction furnace according to claim 8, characterized in that: A waste gas recovery tank (45) is fixedly connected to the side of the hydrogen reduction furnace (1); the air inlet end and the air outlet end of the air pump 1 (43) are both connected to the waste gas recovery tank (45) via a recovery pipe (46); and two solenoid valves are respectively provided on the recovery pipe (46) and the air inlet pipe (32).

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