CN204923825U - Alumina shaft kiln is calcined to flaring formula circular section - Google Patents
Alumina shaft kiln is calcined to flaring formula circular section Download PDFInfo
- Publication number
- CN204923825U CN204923825U CN201520561890.3U CN201520561890U CN204923825U CN 204923825 U CN204923825 U CN 204923825U CN 201520561890 U CN201520561890 U CN 201520561890U CN 204923825 U CN204923825 U CN 204923825U
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- kiln
- brick
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- alumina
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- 229910003726 AI2O3 Inorganic materials 0.000 title 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N AI2O3 Inorganic materials 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[O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000011449 brick Substances 0.000 claims description 39
- 238000001354 calcination Methods 0.000 claims description 19
- 238000009413 insulation Methods 0.000 claims description 15
- 241000273930 Brevoortia tyrannus Species 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 229910052863 mullite Inorganic materials 0.000 claims description 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-K [O-]P([O-])([O-])=O Chemical compound 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- 239000003517 fume Substances 0.000 abstract 1
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- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound 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[O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model provides an alumina shaft kiln is calcined to flaring formula circular section, the utility model relates to a calcine the alumina shaft kiln, by the buffering storehouse, the kiln body, the nozzle, the temperature measurement piezometer orifice, the unloader, bleeder valve and support constitute, be equipped with the kiln body on the support, the top of the kiln body is equipped with the buffering storehouse, the internal distributing device that is equipped with of kiln of buffering storehouse below, be equipped with nozzle and temperature measurement piezometer orifice on the kiln body, the bottom of the kiln body is equipped with the unloader, the unloader below is equipped with the bleeder valve, be equipped with the pipeline on the kiln body of unloader top, be equipped with the air -blower on the pipeline, the kiln body is airtight type structure, kiln body top is equipped with the draught fan, be equipped with the pipe of discharging fume on the draught fan, the utility model discloses the practicality is strong, and material canopy kiln phenomenon reduces, and shaft kiln output obtains improving, gives birth to fever, the reduction of burning volume, and product quality is stable, and raw materials size range strong adaptability is to the requirement of fuel type un -specificness.
Description
[technical field]
The utility model relates to a kind of calcined alumina shaft furnace, especially relates to a kind of gradual-enlargement type circular section calcined alumina shaft furnace.
[background technology]
Known, current China is used for the furnace equipment of alumina raw calcining mainly based on rotary kiln and shaft furnace, and the energy consumption of unit product of rotary kiln comparatively shaft furnace is high, the advantage therefore in energy-saving and emission-reduction is not as shaft furnace.
Different according to the shape of shaft furnace cross section, shaft furnace is divided into again circular cross-section shaft furnace and square-section shaft furnace, and current shaft furnace exists following shortcoming:
(1) phenomenon got stuck in shaft furnace running is comparatively serious, is many especially with square-section shaft furnace;
(2) owing to often needing to stop the timely handling failure of kiln, therefore output is difficult to improve;
(3) partially to burn phenomenon more for square-section shaft furnace;
(4) calcined alumina raw material granularity narrow range, shaft furnace operability is bad.
[utility model content]
In order to overcome the deficiency in background technology, the utility model discloses a kind of gradual-enlargement type circular section calcined alumina shaft furnace, the utility model by arranging surge bunker, distributing device, unloader, air blast and air-introduced machine in kiln body, with this variation characteristic of alumina raw in calcination process of fitting, thus reach the object reducing material canopy kiln phenomenon, improve output, reduce raw burn and burning and stabilized product quality.
In order to realize described utility model object, the utility model adopts following technical scheme:
A kind of gradual-enlargement type circular section calcined alumina shaft furnace, comprise surge bunker, kiln body, burner, thermometric pressure tap, unloader, outlet valve and support, support is provided with kiln body, the top of kiln body is provided with surge bunker, distributing device is provided with in kiln body below surge bunker, kiln body is provided with burner and thermometric pressure tap, the bottom of kiln body is provided with unloader, outlet valve is provided with below unloader, kiln body above unloader is provided with pipeline, and pipeline is provided with air blast, and kiln body is hermetic type structure, kiln body top is provided with air-introduced machine, and air-introduced machine is provided with smoke exhaust pipe.
Described kiln body is made up of shell, liner and thermal insulation layer from outside to inside, and kiln body is divided into preheating section, calcining section and cooling section from top to bottom successively, and kiln body cross section is round, and the cross section of kiln body expands from top to bottom gradually.
The liner of described preheating section is made by three grades of high-alumina bricks, and thermal insulation layer is made by light weight fireclay brick, and preheating section is provided with at least one deck first burner.
The liner of described calcining section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, and calcining section is at least provided with one deck second burner, and the power of the second burner is greater than the power of the first burner.
The liner of described cooling section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, and side, cooling section bottom is provided with accident treatment hole.
Owing to have employed technique scheme, the utility model has following beneficial effect:
A kind of gradual-enlargement type circular section described in the utility model calcined alumina shaft furnace, comprise surge bunker, kiln body, burner, thermometric pressure tap, unloader, outlet valve and support, by arranging surge bunker, distributing device, unloader, air blast and air-introduced machine in kiln body, with this variation characteristic of alumina raw in calcination process of fitting, thus reach the object reducing material canopy kiln phenomenon, improve output, reduce raw burn and burning and stabilized product quality; The utility model is practical, and material canopy kiln phenomenon reduces, and shaft furnace output is improved, and raw burn, burning amount reduce, constant product quality, and raw material lumpiness range accommodation is strong, to fuel type without particular/special requirement.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model.
In figure: 1, surge bunker; 2, kiln body; 3, the first burner; 4, the second burner; 5, thermometric pressure tap; 6, unloader; 7, outlet valve; 8, air blast; 9, single bucket elevator; 10, feed bin; 11, oscillating feeder; 12, batch box; 13, rubber conveyer; 14, support.
[detailed description of the invention]
By explanation the utility model that the following examples can be detailed, open the purpose of this utility model is intended to protect all technological improvements within the scope of the utility model.
A kind of gradual-enlargement type circular section calcined alumina shaft furnace by reference to the accompanying drawings described in 1, comprise surge bunker 1, kiln body 2, burner, thermometric pressure tap 5, unloader 6, outlet valve 7 and support 14, be provided with kiln body 2 on the support 14, the top of kiln body 2 is provided with surge bunker 1, distributing device is provided with in kiln body below surge bunker, kiln body 2 is provided with burner and thermometric pressure tap 5, the bottom of kiln body 2 is provided with unloader 6, outlet valve 7 is provided with below unloader 6, kiln body 2 above unloader 6 is provided with pipeline, pipeline is provided with air blast 8, kiln body 2 is hermetic type structure, kiln body 2 top is provided with air-introduced machine, air-introduced machine is provided with smoke exhaust pipe, described kiln body 2 is made up of shell, liner and thermal insulation layer from outside to inside, and kiln body 2 is divided into preheating section, calcining section and cooling section from top to bottom successively, and kiln body 2 cross section is round, and the cross section of kiln body 2 expands from top to bottom gradually, the liner of described preheating section is made by three grades of high-alumina bricks, and thermal insulation layer is made by light weight fireclay brick, and preheating section is provided with at least one deck first burner 3, the liner of described calcining section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, and the power that calcining section is at least provided with one deck second burner 4, second burner 4 is greater than the power of the first burner 3, the liner of described cooling section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, and side, cooling section bottom is provided with accident treatment hole.
Implement a kind of gradual-enlargement type circular section described in the utility model calcined alumina shaft furnace, in use, raw material is first through classification, the life of product is reduced with this, burning rate, after classification is complete, raw material is put into feed bin 10, then step feed is carried out by the oscillating feeder 11 bottom feed bin 10, raw material carries out taking certain raw material through batch box 12 again, thus enter on rubber conveyer 13, raw material is put in single bucket elevator 9 by rubber conveyer 13, by single bucket elevator 9, raw material is put in surge bunker 1, in kiln body 2, cloth is carried out again by the bell distributing device in kiln body 2, kiln body 2 adopts the circular cross section expanded gradually, kiln body 2 is divided into preheating zone from top to down, burning zone and salband, kiln body 2 structure mainly comprises shell, liner and thermal insulation layer, shell adopts welding for steel structure to form, liner uses refractory material laying to form, the liner of preheating section is made by three grades of high-alumina bricks, thermal insulation layer is made by light weight fireclay brick, calcining section and the liner of cooling section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick are made, thermal insulation layer is made by light weight fireclay brick, the impact that the liner of burning zone and salband is subject to and wearing and tearing the most serious, therefore time below 1300 DEG C, liner selects phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum-mullite brick is selected when more than 1300 DEG C, preheating zone is at least provided with one deck first burner 3 and thermometric pressure tap 5, can make like this to use alumina raw to complete dehydration smoothly in preheating zone, in order to enhanced burning temperature, and ensure the uniformity of temperature, calcining section arranges at least one deck second burner 4, can ensure that flame has certain penetration power like this, high-temperature flue gas is enable to penetrate the bed of material, also utilize the high temperature secondary air come through heat exchange at the bottom of kiln to carry out remaining the burning of combustion gas simultaneously, high-temperature material after calcining section calcining moves from top to bottom, the cold wind that cooling air blasts under the effect of air blast 8 enters in kiln body through kiln body 2 bottom even and also blows from bottom to top, high-temperature material and cold wind is salband countercurrent flow in shaft furnace, hot blast after heat exchange further heating and combustion product gases after clinkering zone enter preheating zone after mixing and carry out heat exchange with the material just having entered stove, thus energy-conservation effect can be played, and in cooling section, according to the mechanistic features of alumina calcining, in calcination process, meeting generating portion high-temperature liquid-phase in alumina material, after material enters salband, liquid phase component can solidify, in order to avoid the bonding between material, from calcining section to discharge gate, along material downflow direction, cross section expands gradually, to increase the gap between material, prevents caking from causing canopy kiln accident, accident treatment hole is put, so that the accident constructed, feed and process once occur at cooling section lower side wall paper.
The non-detailed portion of the utility model is prior art.
Claims (5)
1. a gradual-enlargement type circular section calcined alumina shaft furnace, comprise surge bunker, kiln body, burner, thermometric pressure tap, unloader, outlet valve and support, it is characterized in that: on support, be provided with kiln body, the top of kiln body is provided with surge bunker, distributing device is provided with in kiln body below surge bunker, kiln body is provided with burner and thermometric pressure tap, the bottom of kiln body is provided with unloader, outlet valve is provided with below unloader, kiln body above unloader is provided with pipeline, and pipeline is provided with air blast, and kiln body is hermetic type structure, kiln body top is provided with air-introduced machine, and air-introduced machine is provided with smoke exhaust pipe.
2. a kind of gradual-enlargement type circular section according to claim 1 calcined alumina shaft furnace, it is characterized in that: described kiln body is made up of shell, liner and thermal insulation layer from outside to inside, kiln body is divided into preheating section, calcining section and cooling section from top to bottom successively, kiln body cross section is round, and the cross section of kiln body expands from top to bottom gradually.
3. a kind of gradual-enlargement type circular section according to claim 2 calcined alumina shaft furnace, is characterized in that: the liner of described preheating section is made by three grades of high-alumina bricks, and thermal insulation layer is made by light weight fireclay brick, preheating section is provided with at least one deck first burner.
4. a kind of gradual-enlargement type circular section according to claim 2 calcined alumina shaft furnace, it is characterized in that: the liner of described calcining section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, calcining section is at least provided with one deck second burner, and the power of the second burner is greater than the power of the first burner.
5. a kind of gradual-enlargement type circular section according to claim 2 calcined alumina shaft furnace, it is characterized in that: the liner of described cooling section by phosphate in conjunction with high-alumina brick, siliceous mullite brick or corundum not brick be made, thermal insulation layer is made by light weight fireclay brick, and side, cooling section bottom is provided with accident treatment hole.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746769A (en) * | 2016-12-23 | 2017-05-31 | 山西奋达机械制造有限公司 | Upright active lime calcining furnace |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106746769A (en) * | 2016-12-23 | 2017-05-31 | 山西奋达机械制造有限公司 | Upright active lime calcining furnace |
| CN106746769B (en) * | 2016-12-23 | 2019-04-30 | 山西奋达机械制造有限公司 | Upright active lime calcining furnace |
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