CN220793903U - Aluminum hydroxide drying and roasting system - Google Patents
Aluminum hydroxide drying and roasting system Download PDFInfo
- Publication number
- CN220793903U CN220793903U CN202322616563.0U CN202322616563U CN220793903U CN 220793903 U CN220793903 U CN 220793903U CN 202322616563 U CN202322616563 U CN 202322616563U CN 220793903 U CN220793903 U CN 220793903U
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- aluminum hydroxide
- drying
- cyclone separator
- roasting
- roasting furnace
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 title claims abstract description 61
- 238000001035 drying Methods 0.000 title claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 11
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 4
- 239000000725 suspension Substances 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 9
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 8
- 239000007787 solid Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000002918 waste heat Substances 0.000 description 4
- 238000001354 calcination Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004131 Bayer process Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910001570 bauxite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The utility model provides an aluminum hydroxide drying and roasting system which comprises a drying device, a preheating device, a roasting furnace and a cooling device which are sequentially connected, wherein a material distributing device is arranged between the preheating device and the roasting furnace, at least one discharging end of the material distributing device is connected with the roasting furnace, and at least one discharging end of the material distributing device is connected with a heat exchanger for producing dried aluminum hydroxide. According to the utility model, the material distributing device and the heat exchanger are added after the drying device and the preheating device, so that the aluminum hydroxide can be produced while the aluminum hydroxide is produced by using the aluminum hydroxide gas suspension roasting furnace, and the construction cost of separately constructing the drying and grading of the aluminum hydroxide can be reduced; according to the method, the heat exchanger is utilized to separate part of the discharged material of the preheating device, and the dried aluminum hydroxide product with low temperature is obtained through heat exchange and cooling.
Description
Technical Field
The utility model relates to the technical field of alumina production, in particular to an aluminum hydroxide drying and roasting system.
Background
Aluminum hydroxide is mainly used for producing metallurgical-grade aluminum oxide, and then metal aluminum is produced after electrolysis. Meanwhile, aluminum hydroxide is widely applied to a plurality of fields as chemical raw materials, including medicines, catalysts and carriers thereof, rubber, pigment, papermaking, refractory materials, insulating materials, filling materials, ceramics and the like.
At present, the domestic aluminum hydroxide production generally adopts the Bayer process production technology, and bauxite is subjected to the procedures of ore pulp preparation, high-temperature dissolution, separation and washing, filtration and decomposition, flat-plate filtration and the like to produce the wet aluminum hydroxide with 3-8% of attached water. The alumina production generally adopts a gaseous suspension roasting furnace to remove the adhering water and the crystallization water of the aluminum hydroxide, and the gaseous suspension roasting furnace only produces the alumina at present, but cannot obtain a dried aluminum hydroxide product.
The Chinese patent publication No. CN209763775U with publication No. 2019-12-10 discloses an aluminum hydroxide gas suspension roasting furnace device and a waste heat utilization device thereof, comprising a feeding device, a drying and preheating device, a roasting furnace and a cooling device which are sequentially connected, wherein the cooling device comprises cyclone coolers which are arranged in multiple stages, the outer wall of at least one stage of cyclone cooler is provided with a heat exchange water pipe for carrying out heat exchange with the cyclone cooler, and the inlet and the outlet of the heat exchange water pipe are respectively connected with a heat exchange medium storage device and an energy consumption device. The device utilizes the heat exchange medium to recycle the internal heat of the cyclone cooler to supply the energy consumption device for use, but the device can only produce alumina, but can not obtain a dry aluminum hydroxide product.
Disclosure of Invention
Aiming at the technical problems, the utility model provides an aluminum hydroxide drying and roasting system which is used for solving the problem that a gaseous suspension roasting furnace only produces aluminum oxide but cannot obtain a dried aluminum hydroxide product in the prior art, so that the aluminum oxide product can be produced and the dried aluminum hydroxide product can be produced at the same time, thereby reducing the construction cost and the production cost of independently constructing an aluminum hydroxide drying device.
In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:
the utility model provides an aluminium hydroxide drying roasting system, includes drying device, preheating device, calcination stove and the cooling device who connects gradually, be equipped with feed divider between preheating device and the calcination stove, at least one discharge end of feed divider is connected with the calcination stove, and in addition at least one discharge end is connected with the heat exchanger and is used for producing dry aluminium hydroxide.
According to the utility model, the material distributing device and the heat exchanger are added after the drying device and the preheating device, so that the aluminum hydroxide can be produced by utilizing the aluminum hydroxide gas suspension roasting furnace to produce aluminum oxide, and meanwhile, the dry aluminum hydroxide can be produced, and the construction cost for separately constructing the drying and grading of the aluminum hydroxide can be reduced.
Further, in order to screen out the part with proper granularity of the dried aluminum hydroxide as a product, a screening device is connected to the heat exchanger.
Further, at least one outlet of the screening device is connected to the cooling device in order to return the fraction which does not meet the particle size requirements of the aluminium hydroxide product back into the cooling device.
Further, in order to separate the water from the aluminum hydroxide attached with water to separate the liquid-solid system, the device further comprises a separation device, wherein the separation device comprises a secondary cyclone separator, and the separation device is connected with the roasting furnace through the secondary cyclone separator.
Further, in order to further separate moisture and/or gas from the roasted aluminum hydroxide and separate a liquid-solid system and/or a gas-solid system, the separation device further comprises a third-stage cyclone separator, and the roasting furnace is circularly connected with the second-stage cyclone separator through the third-stage cyclone separator.
Further, in order to convey the high-temperature flue gas to the drying device, a heat source is provided for the drying device, and the secondary cyclone separator is connected with the drying device.
Further, in order to cool the alumina separated from the liquid-solid system and/or the gas-solid system, the three-stage cyclone separator is connected to a cooling device.
Further, in order to facilitate connection of the tertiary cyclone separator to the secondary cyclone separator, the tertiary cyclone separator is connected to the secondary cyclone separator through a connection pipe.
Further, in order to facilitate connection of the material distributing device and the secondary cyclone separator, at least one discharging end of the material distributing device is connected with the connecting pipe.
Further, the cooling device is connected with the roasting furnace in order to provide the roasting furnace with high-temperature combustion air by utilizing waste heat in the cooling process.
Further, in order to make the drying of the aluminum hydroxide with water better, the drying device is a venturi dryer.
The utility model has the beneficial effects that:
1. according to the utility model, the material distributing device and the heat exchanger are added after the drying device and the preheating device, so that the aluminum hydroxide can be produced while the aluminum hydroxide is produced by using the aluminum hydroxide gas suspension roasting furnace, and the construction cost of separately constructing the drying and grading of the aluminum hydroxide can be reduced;
2. according to the utility model, the heat exchanger is arranged, and the discharging of the primary cyclone preheater is partially separated, and the aluminum hydroxide product with low drying temperature is obtained through heat exchange and cooling;
3. according to the utility model, the screening device can be arranged as required to screen out aluminum hydroxide with proper granularity as a product, and the part which does not meet the granularity requirement of the aluminum hydroxide product is returned to the cooling device again, and the waste heat of the cooling device is utilized to be converted into an aluminum oxide product.
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 structural view of the present utility model.
In the figure: 1-venturi drier, 2-first cyclone preheater, 3-feed divider, 4-connecting pipe, 5-second cyclone separator, 6-gas suspension roasting furnace, 7-third cyclone separator, 8-cooling device, 9-screening device, 10-heat exchanger.
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.
As shown in fig. 1, an aluminum hydroxide drying and roasting system according to embodiment 1 of the present utility model comprises a drying device, a preheating device, a roasting furnace 6 and a cooling device 8, which are connected in this order. The drying device is used as a feeding device, and the aluminum hydroxide with water enters the aluminum hydroxide drying and roasting system from the drying device and is dried by the drying device. In this embodiment, the drying device is a venturi dryer 1, and the preheating device is a primary cyclone preheater 2. A material distributing device 3 is arranged between the preheating device, namely the primary cyclone preheater 2 and the roasting furnace 6, and the discharge end of the primary cyclone preheater 2 is connected with the feed end of the material distributing device 3. The feed divider 3 is provided with at least two discharge ends, of which at least one discharge end is connected to the calciner 6 for producing the aluminium oxide product, and at least one other discharge end of the feed divider 3 is connected to the heat exchanger 10 for producing the dried aluminium hydroxide.
Further, as shown in fig. 1, a screening device 9 is connected to the heat exchanger 10. The screening device 9 is provided with at least two discharge ports, the dried aluminum hydroxide is screened by the screening device 9, and the screened aluminum hydroxide with proper granularity is produced from at least one discharge port of the screening device 9 as a product, so that the dried aluminum hydroxide is obtained.
Further, as shown in fig. 1, at least one discharge port of the sieving device 9 is connected with the cooling device 8, so that the aluminum hydroxide which does not meet the granularity requirement of the aluminum hydroxide product is returned to the cooling device 8 again, and the waste heat of the high-temperature aluminum oxide is utilized to remove the crystal water, so that the aluminum oxide is produced. And the cooling device 8 is connected with the roasting furnace 6 to provide high-temperature combustion air for the roasting furnace 6.
The above-mentioned distributing device 3, screening device 9 and cooling device 8 are of the prior art construction.
Example 2 differs from example 1 in that it further comprises a separation device for separating the liquid-solid system and/or the gas-solid system of aluminum hydroxide or aluminum oxide, the separation device comprises a secondary cyclone 5 and a tertiary cyclone 7, and at least one discharge end of the separation device 3 is connected with a feed end of the secondary cyclone 5. The secondary cyclone separator 5 is provided with at least two discharge ends, and at least one discharge end of the secondary cyclone separator 5 is connected with the feed end of the roasting furnace 6. One discharge end of the secondary cyclone separator 5 is connected with the venturi dryer 1 and is used for conveying high-temperature flue gas to the venturi dryer 1 and providing a heat source for the venturi dryer 1.
Further, the roasting furnace 6 is circularly connected with the secondary cyclone 5 through the tertiary cyclone 7. Specifically, the discharge end of the roasting furnace 6 is connected with the feed end of the three-stage cyclone separator 7, the three-stage cyclone separator 7 is provided with at least two discharge ends, at least one discharge end of the three-stage cyclone separator 7 is connected with the feed end of the secondary cyclone separator 5, and at least one discharge end of the secondary cyclone separator 5 is connected with the feed end of the roasting furnace 6 to form a circulating connection.
Further, the discharge end of the three-stage cyclone separator 7 is connected with the feed end of the cooling device 8 to cool the alumina product.
Example 3 differs from example 2 in that at least one discharge end of the tertiary cyclone 7 is connected to a feed end of the secondary cyclone 5 by a connecting pipe 4, as shown in fig. 1. At least one discharge end of the material distributing device 3 is connected with the connecting pipe 4, so that the connection with the roasting furnace 6 through the connecting pipe 4 and the secondary cyclone 5 is realized.
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 an aluminium hydroxide drying roasting system, includes drying device, preheating device, roasting furnace (6) and cooling device (8) that connect gradually, its characterized in that: a material distributing device (3) is arranged between the preheating device and the roasting furnace (6), at least one discharging end of the material distributing device (3) is connected with the roasting furnace (6), and at least one discharging end is connected with a heat exchanger (10) for producing dry aluminum hydroxide.
2. The aluminum hydroxide drying roasting system according to claim 1, wherein: the heat exchanger (10) is connected with a screening device (9).
3. The aluminum hydroxide drying roasting system according to claim 2, wherein: at least one discharge port of the screening device (9) is connected with a cooling device (8).
4. The aluminum hydroxide drying and roasting system according to any one of claims 1 to 3, wherein: the device is characterized by further comprising a separation device, wherein the separation device comprises a secondary cyclone separator (5), and the material separation device (3) is connected with the roasting furnace (6) through the secondary cyclone separator (5).
5. The aluminum hydroxide drying roasting system according to claim 4, wherein: the secondary cyclone separator (5) is connected with the drying device.
6. The aluminum hydroxide drying roasting system according to claim 4, wherein: the separation device also comprises a three-stage cyclone separator (7), and the roasting furnace (6) is circularly connected with the two-stage cyclone separator (5) through the three-stage cyclone separator (7).
7. The aluminum hydroxide drying roasting system according to claim 6, wherein: the three-stage cyclone separator (7) is connected with a cooling device (8).
8. The aluminum hydroxide drying and roasting system according to claim 6 or 7, wherein: the three-stage cyclone separator (7) is connected with the two-stage cyclone separator (5) through a connecting pipe (4).
9. The aluminum hydroxide drying roasting system according to claim 8, wherein: at least one discharge end of the material distributing device (3) is connected with the connecting pipe (4).
10. The aluminum hydroxide drying and roasting system according to any one of claims 1 to 3 or 5 to 7 or 9, characterized in that: the cooling device (8) is connected with the roasting furnace (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322616563.0U CN220793903U (en) | 2023-09-26 | 2023-09-26 | Aluminum hydroxide drying and roasting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322616563.0U CN220793903U (en) | 2023-09-26 | 2023-09-26 | Aluminum hydroxide drying and roasting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220793903U true CN220793903U (en) | 2024-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322616563.0U Active CN220793903U (en) | 2023-09-26 | 2023-09-26 | Aluminum hydroxide drying and roasting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220793903U (en) |
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2023
- 2023-09-26 CN CN202322616563.0U patent/CN220793903U/en active Active
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