Device and method for retarding hydrometallurgy bonding and flow loss of fluidized bed
By using a pulsed hydrogen blowing device in the fluidized bed, the contact points of metal iron particles are destroyed and the bonded particles are cracked, and the problem of loss of bonded hydrogen metallurgy bonding of the fluidized bed is solved, and the stable operation of the fluidized bed is achieved.
Patent Information
- Application Number
- CN202510452369.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2025-07-11
AI Technical Summary
During the fluidized bed hydrogen metallurgy process, the metal iron particles have strong bonding force, resulting in loss of bonding, which is difficult to predict and process, resulting in system blockage and increased processing difficulty.
Hydrogen is used to promote pulses, and through the central gas distributor, the circumferential annular and circumferential annular gas distributor, the pulse generator is used to vibrate the solid particles in the fluidized bed, destroy the contact points and crack the bonded particles, and reduce the chance of particle contact.
Effectively slow down the loss of fluidized bed hydrogen metallurgy bonding, avoid system blockage, and improve production stability.
Smart Images
Figure CN120290804A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of hydrogen metallurgy, and particularly relates to a device and method for slowing down the caking and flow loss in fluidized bed hydrogen metallurgy. Background Technique
[0002] The fluidized bed hydrogen metallurgy iron-making process has the advantages of directly using iron powder ore, not relying on coking coal resources, good mass transfer and heat transfer conditions, and low carbon. It provides the possibility for the rational utilization of domestic low-grade and complex symbiotic ores and the solution to the shortage of iron ore resources supply. However, during the operation of this system, there is still a strong adhesive force between the metal iron-metal iron contact interfaces of particles during reduction, and the phenomenon of caking and flow loss will occur, resulting in system blockage. At the same time, the phenomenon of caking and flow loss cannot be directly observed, and it can only be determined when the phenomenon of caking and flow loss deteriorates step by step until normal production cannot be carried out. Moreover, the later the phenomenon of caking and flow loss occurs, the greater the treatment difficulty. Summary of the Invention
[0003] The purpose of the present invention is to provide a device and method for slowing down the caking and flow loss in fluidized bed hydrogen metallurgy. By blowing hydrogen in a pulsed manner, the solid particles in the fluidized bed are continuously vibrated to break the contact points, which can significantly slow down the caking phenomenon. At the same time, the pulsed gas flow can also be used to crack a part of the caked particles, thereby slowing down the contact at the particle contact interface during reduction, and thus slowing down the caking and flow loss phenomenon in fluidized bed hydrogen metallurgy.
[0004] In order to achieve the above object, the present invention is realized by adopting the following technical solutions:
[0005] A device for slowing down the caking and flow loss in fluidized bed hydrogen metallurgy includes a fluidized bed, a central gas distributor, a circumferential annular gas distributor, a circumferential ring gap gas distributor, a central gas airway, a circumferential annular airway, a circumferential ring gap airway, a pulse generator a, a pulse generator b, and a pulse generator c. The central gas distributor, the circumferential annular gas distributor, and the circumferential ring gap gas distributor are arranged at the lower part of the fluidized bed. The central gas distributor is arranged at the central position of the fluidized bed. The circumferential ring gap gas distributor is arranged along the inner wall of the fluidized bed. The circumferential annular gas distributor is between the central gas distributor and the circumferential ring gap gas distributor. The central gas distributor is connected to the central gas airway at the bottom. The circumferential annular gas distributor is connected to the circumferential annular airway at the bottom. The circumferential ring gap gas distributor is connected to the circumferential ring gap airway at the bottom. The central gas airway, the circumferential annular airway, and the circumferential ring gap airway are respectively connected to the pulse generator a, the pulse generator b, and the pulse generator c through pipelines.
[0006] The central gas distributor, the circumferential annular gas distributor, and the circumferential ring gap gas distributor are all gas distribution plates with sieves.
[0007] The gas distribution plate with a sieve is made of high-temperature resistant military steel, or a refractory casting or masonry body.
[0008] The gas medium blown into the fluidized bed by the pipeline is hydrogen.
[0009] The ratio of the cross-sectional area S1 of the central gas distributor, the cross-sectional area S2 of the circumferential annular gas distributor, and the cross-sectional area S3 of the circumferential ring gap gas distributor is: S1:S2:S3 = (0.1 - 0.2):(0.4 - 0.6):(0.2 - 0.4), where S1 + S1 + S1 = the cross-sectional area S of the bottom of the fluidized bed.
[0010] A method for slowing down the caking and flow loss in hydrogen metallurgy of a fluidized bed, which is realized by using the device for slowing down the caking and flow loss in hydrogen metallurgy of a fluidized bed, specifically including: the working frequencies of pulse generator a, pulse generator b, and pulse generator c are the same, and when pulse generator b is at the peak, pulse generator a is at the trough and pulse generator c is at the trough, so that the materials in the fluidized bed are stratified, reducing the contact opportunities of the reduced metallic iron particles. At the same time, using the hydrogen gas flow pulse phenomenon to continuously crack the contact points between the metallic iron particles, thereby slowing down the caking and flow loss phenomenon in hydrogen metallurgy of the fluidized bed.
[0011] Compared with the prior art, the beneficial effects of the present invention are:
[0012] The present invention provides three types of pulse generators to make the central air flow, circular air flow, and peripheral air flow in the fluidized bed into a columnar-ring air flow, so that the materials in the fluidized bed are stratified in the circumferential direction, reducing the contact opportunities. Even if there are contacts, some of them can be cracked, thereby slowing down the contact at the particle contact interface during reduction, and thus slowing down the caking and flow loss phenomenon in hydrogen metallurgy of the fluidized bed. Brief Description of the Drawings
[0013] Figure 1 is a schematic structural diagram of a device for slowing down the caking and flow loss in hydrogen metallurgy of a fluidized bed according to the present invention.
[0014] Figure 2 is Figure 1 the view from direction A in
[0015] In the figure: 1 - fluidized bed, 2 - central gas distributor, 3 - circumferential annular gas distributor, 4 - circumferential ring gap gas distributor, 5 - central gas airway, 6 - circumferential annular airway, 7 - circumferential ring gap airway, 8 - pulse generator a, 9 - pulse generator b, 10 - pulse generator c. Detailed Embodiments
[0016] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the following further illustrates the specific embodiments of the present invention in conjunction with the embodiments. The following embodiments are used to specifically illustrate the content of the present invention. These embodiments are only general descriptions of the content of the present invention and do not limit the content of the present invention.
[0017] As Figure 1 , Figure 2 shown, a device for slowing down the bonding and flow loss in hydrogen metallurgy of fluidized bed includes a fluidized bed 1, a central gas distributor 2, a circumferential annular gas distributor 3, a circumferential annular slit gas distributor 4, a central gas airway 5, a circumferential annular airway 6, a circumferential annular slit airway 7, a pulse generator a8, a pulse generator b9 and a pulse generator c10. The central gas distributor 2, the circumferential annular gas distributor 3 and the circumferential annular slit gas distributor 1 are arranged at the lower part of the fluidized bed 1. The central gas distributor 2 is arranged at the central position of the fluidized bed 1. The circumferential annular slit gas distributor 4 is arranged along the inner wall of the fluidized bed 1. The circumferential annular gas distributor 3 is between the central gas distributor 2 and the circumferential annular slit gas distributor 4. The central gas distributor 2 is connected to the central gas airway 5 at the bottom. The circumferential annular gas distributor 3 is connected to the circumferential annular airway 6 at the bottom. The circumferential annular slit gas distributor 4 is connected to the circumferential annular slit airway 7 at the bottom. The central gas airway 5, the circumferential annular airway 6 and the circumferential annular slit airway 7 are respectively connected to the pulse generator a8, the pulse generator b9 and the pulse generator c10 through pipelines.
[0018] The central gas distributor 2, the circumferential annular gas distributor 3 and the circumferential annular slit gas distributor 4 are all gas distribution plates with screens.
[0019] The gas distribution plate with a screen is made of high-temperature resistant military steel, or is a refractory casting or masonry body.
[0020] The gas medium blown into the fluidized bed 1 by the pipeline is hydrogen.
[0021] The ratio of the cross-sectional area S1 of the central gas distributor, the cross-sectional area S2 of the circumferential annular gas distributor and the cross-sectional area S3 of the circumferential annular slit gas distributor is: S1:S2:S3 = 0.2:0.5:0.3.
[0022] A method for slowing down the caking and flow loss in hydrogen metallurgy of fluidized bed, which is realized by using the device for slowing down the caking and flow loss in hydrogen metallurgy of fluidized bed, specifically including: the generating frequencies of pulse generator a8, pulse generator b9 and pulse generator c10 are the same, and the air volume at the frequency valley of the pulse generator is 1 / 6 to 1 / 2 of the air volume at the frequency peak. Pulse generator b is at the peak, corresponding to pulse generator a at the valley and pulse generator c at the valley, so as to stratify the materials in the fluidized bed in the circumferential direction, reduce the contact opportunity, and at the same time, a part of the caking particles can be cracked by the pulsed air flow, thereby slowing down the caking and flow loss phenomenon in hydrogen metallurgy of fluidized bed.
Claims
1. An apparatus for reducing caking and flow loss in hydrogen metallurgy of fluidized bed, characterized in that, It includes a fluidized bed, a central gas distributor, a circumferential annular gas distributor, a circumferential annular slit gas distributor, a central gas airway, a circumferential annular airway, a circumferential annular slit airway, pulse generator a, pulse generator b, and pulse generator c. The central gas distributor, the circumferential annular gas distributor, and the circumferential annular slit gas distributor are arranged at the lower part of the fluidized bed. The central gas distributor is arranged at the central position of the fluidized bed. The circumferential annular slit gas distributor is arranged along the inner wall of the fluidized bed. The circumferential annular gas distributor is between the central gas distributor and the circumferential annular slit gas distributor. The central gas distributor is connected to the central gas airway at the bottom. The circumferential annular gas distributor is connected to the circumferential annular airway at the bottom. The circumferential annular slit gas distributor is connected to the circumferential annular slit airway at the bottom. The central gas airway, the circumferential annular airway, and the circumferential annular slit airway are respectively connected to pulse generator a, pulse generator b, and pulse generator c through pipelines.
2. The device for reducing caking and flow loss in hydrogen metallurgy of fluidized bed according to claim 1, wherein, The central gas distributor, the circumferential annular gas distributor, and the circumferential annular slit gas distributor are all gas distribution plates with screens.
3. The device for reducing caking and flow loss in hydrogen metallurgy of fluidized bed according to claim 2, characterized in that, The gas distribution plate with a screen is made of high-temperature resistant steel, or is a refractory casting or masonry body.
4. A device for reducing caking and flow loss in hydrogen metallurgy of a fluidized bed according to claim 1, characterized in that, The gas medium blown into the fluidized bed by the pipeline is hydrogen.
5. The device for reducing caking and flow loss in hydrogen metallurgy of fluidized bed according to claim 1, characterized in that, The ratio of the cross-sectional area S1 of the central gas distributor, the cross-sectional area S2 of the circumferential annular gas distributor, and the cross-sectional area S3 of the circumferential annular slit gas distributor is: S1:S2:S3 = (0.1 - 0.2):(0.4 - 0.6):(0.2 - 0.4), where S1 + S1 + S1 = the cross-sectional area S of the bottom of the fluidized bed.
6. A method for slowing down the bonding and flow loss in hydrogen metallurgy of fluidized bed, characterized in that, This method is realized by using the device for slowing down the bonding and flow loss in hydrogen metallurgy of the fluidized bed as described in any one of claims 1 - 5. Specifically, it includes: the operating frequencies of pulse generator a, pulse generator b, and pulse generator c are the same, and when pulse generator b is at the peak, pulse generator a is at the trough and pulse generator c is at the trough, so that the materials in the fluidized bed are stratified.