CN219199985U - Gaseous suspension roasting furnace with fluidization staying device - Google Patents
Gaseous suspension roasting furnace with fluidization staying device Download PDFInfo
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- CN219199985U CN219199985U CN202223290502.1U CN202223290502U CN219199985U CN 219199985 U CN219199985 U CN 219199985U CN 202223290502 U CN202223290502 U CN 202223290502U CN 219199985 U CN219199985 U CN 219199985U
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Abstract
The utility model provides a gaseous suspension roasting furnace with a fluidization staying device, belongs to the technical field of aluminum hydroxide roasting, and aims to solve the technical problem of high heat consumption in the process of roasting aluminum hydroxide. The gas suspension roasting furnace comprises a cylinder body, wherein the upper part of the cylinder body is provided with a feed inlet and an air outlet, the bottom of the cylinder body is provided with an air inlet, a fluidization stopping device is further arranged in the cylinder body, the fluidization stopping device is positioned above the air inlet, gas introduced by the air inlet enters the inside of the cylinder body through the fluidization stopping device, and a discharge hole is formed in the side wall of the cylinder body above the fluidization stopping device. The utility model reduces the roasting temperature of the roasting furnace by increasing the residence time of the alumina in the roasting furnace, thereby reducing the heat consumption of the roasting furnace.
Description
Technical Field
The utility model belongs to the technical field of aluminum hydroxide roasting, and particularly relates to a gaseous suspension roasting furnace with a fluidization staying device.
Background
The aluminum hydroxide roasting is the last procedure in the alumina production process, and aims to dry the adhering water in the aluminum hydroxide filter cake, remove the crystal water therein and finish the crystal form conversion from gamma-type alumina to alpha-type alumina so as to meet the requirements of metallurgical grade finished alumina.
In the production process of alumina, the furnace type adopted mainly in China at present is a gaseous suspension roasting furnace, the roasting temperature is generally controlled to 1050-1200 ℃, meanwhile, the temperature of a high-temperature area of a combustion chamber of the roasting furnace is as high as 1600 ℃, and a large amount of heat is consumed in the roasting process. For example, patent publication No. CN216558308U discloses a roasting system for preheating aluminum hydroxide by using waste heat of aluminum oxide, comprising a screw plate type feeder, a drying and preheating device, a gaseous suspension roasting furnace and a cooling device which are connected in sequence, wherein the screw plate type feeder comprises hollow screw blades; the cooling device comprises a final cyclone cooling separator, a heat exchanger is arranged on the final cyclone cooling separator, the final cyclone cooling separator and the heat exchanger are respectively connected with a fluidization cooler, the fluidization cooler is connected with a spiral plate feeder, the spiral plate feeder is connected with the heat exchanger, a buffer tank is arranged between the fluidization cooler and the spiral plate feeder, and the material aluminum hydroxide is preheated by recycling the waste heat of high-temperature alumina, so that the fuel consumption of a roasting system is reduced, the running load of circulating water is reduced, and the energy consumption of the system is reduced. However, the above method still requires a large amount of heat to be consumed during the firing process, and therefore, how to reduce the heat consumed during the firing process is a technical problem that the skilled person is urgent to solve.
Disclosure of Invention
Aiming at the technical problem of large heat consumption in the process of roasting aluminum hydroxide, the utility model provides the gaseous suspension roasting furnace with the fluidization staying device, and the roasting temperature of the roasting furnace is reduced by increasing the staying time of alumina in the roasting furnace, so that the heat consumption of the roasting furnace is reduced.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides a take fluidization to stop gaseous state suspension roasting furnace of device, includes the barrel, and barrel upper portion is equipped with feed inlet and gas outlet, and the bottom of barrel is equipped with the air inlet, still is equipped with fluidization stop device in the barrel, and fluidization stop device is located the top of air inlet, and the gas that the air inlet lets in passes through fluidization stop device and gets into the barrel inside, is equipped with the discharge gate on the lateral wall of fluidization stop device top barrel.
The fluidization staying device comprises an air distribution plate, a plurality of air distribution pipes are uniformly distributed on one side of the air distribution plate, and the upper ends of the air distribution pipes are sleeved with air caps and are communicated with the air caps.
The periphery of the hood is provided with a plurality of air distribution holes, and the air distribution holes further divide the air flow and change the direction of the air flow.
The air distribution plate is provided with a plurality of through holes, a plurality of air distribution pipes are uniformly distributed on one side of the air distribution plate, the air distribution pipes are perpendicular to the air distribution plate and are inserted into the through holes of the air distribution plate, and the air distribution pipes are communicated with two sides of the air distribution plate.
The cylinder body comprises a cylinder barrel and a conical barrel which are integrally formed and communicated at the end parts, powder is separated in the cylinder barrel due to centrifugal force, and the powder is gradually collected in the conical barrel.
The feed inlet is tangent with the side wall of the cylinder, and the air outlet is positioned at the top of the cylinder.
The air distribution plate is horizontally arranged in the conical cylinder, and the powder is fluidized above the air distribution plate finally.
The bottom opening of the conical cylinder forms an air inlet, and the air is directly communicated with the roasting furnace from the bottom.
An annular flexible layer is arranged between the air distribution plate and the inner wall of the cylinder body, and the extrusion of the air distribution plate to the inner wall of the cylinder body due to thermal expansion is absorbed.
The annular flexible layer is an annular ceramic fiber cotton layer manufactured by taking various conventional ceramic fiber cotton as raw materials.
The utility model has the beneficial effects that: the large diameter of the inlet end of the device can obtain lower air flow speed, so that static pressure is approximately kept unchanged along the depth direction, the multi-branch rectification function is added, the uniformity of air distribution is ensured, alumina entering the roasting furnace is fluidized, the residence time of the alumina in the roasting furnace is prolonged, the roasting temperature of the roasting furnace is reduced, and the heat consumption of the roasting furnace is reduced.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a gaseous suspension roaster.
FIG. 2 is a schematic structural view of a fluidization treatment apparatus.
In the figure, 1, a cylinder; 11. a conical cylinder; 12. a cylinder barrel; 2. a discharge port; 3. a feed inlet; 4. an air outlet; 5. a fluidization residence device; 51. a wind distribution plate; 52. an air distribution pipe; 53. a hood.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.
Example 1
The utility model provides a take fluidization stop device's gaseous suspension roasting furnace, shown in fig. 1, includes barrel 1, and barrel 1 upper portion is equipped with feed inlet 3 and gas outlet 4, and in the steam that has carried the alumina powder got into barrel 1 from feed inlet 3, through barrel 1 to solid alumina powder separate, the steam was discharged by gas outlet 4 of barrel 1 top, the alumina powder deposit to the bottom of barrel 1. The bottom of the barrel 1 is provided with an air inlet, the barrel 1 is internally provided with a fluidization stay device 5, the fluidization stay device 5 is positioned above the air inlet, the air inlet can be directly connected with a blower, and the introduced gas enters the barrel 1 through the fluidization stay device 5 to be mixed with powder, so that the alumina powder is fluidized in the fluidization stay device 5, the side wall of the barrel 1 above the fluidization stay device 5 is provided with a discharge port 2, and when the alumina powder is boiled to the same height as the discharge port 2, the alumina powder overflows and is discharged from the discharge port 2. The fluidization residence device 5 can effectively increase the residence time of the alumina powder in the roasting furnace, and avoid the direct discharge of the alumina powder, thereby reducing the roasting temperature of the roasting furnace and reducing the heat consumption of the roasting furnace on the premise of ensuring the roasting effect.
Example 2
The utility model provides a take fluidization to stop device's gaseous state suspension roasting furnace, as shown in fig. 2, fluidization stop device 5 includes air distribution plate 51, has a plurality of through-holes on the air distribution plate 51, evenly distributed has a plurality of air distribution pipes 52 on one side of air distribution plate 51, air distribution pipe 52 perpendicular to air distribution plate 51 and inserts and establish in the through-hole of air distribution plate 51, and when air distribution plate 51 installs in the roasting furnace, air distribution pipe 52 can communicate the cavity of air distribution plate 51 both sides. The air introduced from the air inlet can be uniformly introduced into each air distribution pipe 52. The upper end of the air distribution pipe 52 is sleeved with and communicated with an air cap 53, the air cap 53 is of a hollow semicircular structure, the air cap is arranged at one end of the air distribution pipe 52 through a threaded connection or a buckle connecting sleeve, a plurality of air distribution holes are distributed around the air cap 53, and air flow introduced into the air distribution pipe 52 is discharged outwards through the air distribution holes. By arranging the hood 53, the original vertically upward airflow is enabled to flow horizontally, on one hand, the backflow of the alumina powder into the air distribution pipe 52 can be avoided, on the other hand, the large diameter of the inlet end of the air distribution chamber can obtain lower airflow speed, so that the static pressure is approximately kept unchanged along the depth direction, and the uniformity of air distribution is ensured by adding multi-branch rectification.
Other structures are the same as in embodiment 1.
Example 3
The cylinder 1 comprises a cylindrical cylinder 12 and a conical cylinder 11 which are integrally formed and are communicated at the end parts, as shown in figures 1-2. The feed inlet 3 is tangential with the side wall of the cylinder 12, and the air outlet 4 is positioned at the top of the cylinder 12. The gas with alumina powder introduced from the feed inlet 3 enters the cylinder 12 and then is changed from linear motion to circular motion, and then centrifugal force is generated in rotation, so that the solid powder is thrown to the cylinder wall and falls along the cylinder wall, and is collected at the bottom. However, the air flow reaches the area of the conical cylinder 11, and is drawn toward the center due to the shrinkage of the conical surface, when reaching a certain position, the original rotation direction is kept to spirally move upwards from the middle part of the cylinder 1, and finally the air is discharged out of the cylinder 1 through the air outlet 4, and the alumina powder is finally gathered on the air distribution plate 51 horizontally arranged in the conical cylinder 11. The bottom opening of the cone 11 forms an air inlet, the air flow entering from the bottom is easier to split at the bottom of the cone, and the air pressure laid down in depth is kept stable.
Other structures are the same as in embodiment 2.
Example 4
As shown in fig. 1-2, an annular flexible layer is arranged between the air distribution plate 51 and the inner wall of the cylinder 1. The annular flexible layer is an annular ceramic fiber cotton layer manufactured by taking various conventional ceramic fiber cotton as raw materials. The air distribution plate 51 is mostly made of high-temperature resistant stainless steel, the expansion coefficient of the steel is different from that of a refractory material, and extrusion of the inner wall of the cylinder body 1 caused by thermal expansion of the air distribution plate 51 can be absorbed through the high-temperature resistant annular flexible layer.
Other structures are the same as in embodiment 3.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a take fluidization stop device's gaseous state suspension roasting furnace, includes the barrel, barrel (1) upper portion is equipped with feed inlet (3) and gas outlet (4), and its characterized in that, the bottom of barrel (1) is equipped with the air inlet, still is equipped with fluidization stop device (5) in barrel (1), and fluidization stop device (5) are located the top of air inlet, and the gas that the air inlet lets in passes through fluidization stop device (5) and gets into inside barrel (1), is equipped with discharge gate (2) on the lateral wall of fluidization stop device (5) top barrel (1).
2. The gas suspension roasting furnace with the fluidization stay device according to claim 1, wherein the fluidization stay device (5) comprises an air distribution plate (51), a plurality of air distribution pipes (52) are uniformly distributed on the air distribution plate (51), and a communicated hood (53) is sleeved at the upper end of the air distribution pipe (52).
3. The gas suspension roasting furnace with fluidization stay device according to claim 2, wherein a plurality of air distribution holes are distributed around the hood (53).
4. A gas suspension roasting furnace with fluidization residence device according to claim 3, wherein the air distribution plate (51) is provided with a plurality of through holes, and the air distribution pipe (52) is perpendicular to the air distribution plate (51) and is inserted into the through holes of the air distribution plate (51).
5. A gaseous suspension roasting furnace with fluidization stay device according to any of claims 2-4, characterized in that the cylinder (1) comprises an integrally formed cylinder (12) and a cone (11) communicating at the ends.
6. The gas suspension roasting furnace with fluidization residence device according to claim 5, wherein the feed inlet (3) is tangential to the side wall of the cylinder (12) and the gas outlet (4) is located at the top of the cylinder (12).
7. The gas suspension roasting furnace with fluidization residence device according to claim 6, wherein the air distribution plate (51) is horizontally placed in the conical cylinder (11).
8. A gaseous suspension roasting oven with fluidization residence device according to claim 7, characterized in that the bottom opening of the cone (11) forms an air inlet.
9. A gas suspension roasting furnace with fluidization residence device according to any of claims 2-4 and 6-8, characterized in that an annular flexible layer is provided between the air distribution plate (51) and the inner wall of the cylinder (1).
10. A gaseous suspension roasting oven with fluidization residence device of claim 9, wherein the annular flexible layer is a ceramic fiber cotton layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223290502.1U CN219199985U (en) | 2022-12-08 | 2022-12-08 | Gaseous suspension roasting furnace with fluidization staying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223290502.1U CN219199985U (en) | 2022-12-08 | 2022-12-08 | Gaseous suspension roasting furnace with fluidization staying device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219199985U true CN219199985U (en) | 2023-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223290502.1U Active CN219199985U (en) | 2022-12-08 | 2022-12-08 | Gaseous suspension roasting furnace with fluidization staying device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219199985U (en) |
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2022
- 2022-12-08 CN CN202223290502.1U patent/CN219199985U/en active Active
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