CN202016883U - Device for producing alumina clinker in semidry method - Google Patents

Device for producing alumina clinker in semidry method Download PDF

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Publication number
CN202016883U
CN202016883U CN2011200528758U CN201120052875U CN202016883U CN 202016883 U CN202016883 U CN 202016883U CN 2011200528758 U CN2011200528758 U CN 2011200528758U CN 201120052875 U CN201120052875 U CN 201120052875U CN 202016883 U CN202016883 U CN 202016883U
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CN
China
Prior art keywords
communicated
pipeline
preheater
rotary kiln
air outlet
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Expired - Lifetime
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CN2011200528758U
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Chinese (zh)
Inventor
黄玉婷
王宁
赵成朋
史玉娟
黎娜
王新军
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Northeastern University Engineering and Research Institute Co Ltd
Northeast University Design and Research Institute Co Ltd
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Northeast University Design and Research Institute Co Ltd
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Priority to CN2011200528758U priority Critical patent/CN202016883U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

A device for producing alumina clinker in a semidry method is characterized in that: three cyclone separators are arranged among a rotary kiln, a dust collector and a drying crusher, the air inlet of the dust collector is communicated with the air outlet of the drying crusher through a pipeline, and the air outlet of the dust collector is communicated with the air inlet of the dust collector through the pipeline; and the air outlet of a primary suspension preheater is communicated with the air inlet of the drying crusher through the pipeline, and the pipelines of the primary suspension preheater and the drying crusher are also communicated with the air outlet of a hot blast stove. The device can greatly reduce the energy consumption and pollution and saves the cost, the length of the rotary kiln for producing the same amount of products is reduced for 20-25%, the capacity is improved by 30-50%, and the energy consumption of the unit product is reduced above 30%; and compared with producing the alumina clinker in a dry method, the device does not need to greatly reconstruct the traditional equipment, only the existing equipment is adopted and is simply adjusted to form the device, and the device is convenient to operate and has effects of simplicity and practicability.

Description

A kind of semidrying is produced the device of alumina clinker
Technical field
The utility model relates to the alumina clinker preparation facilities, and particularly a kind of semidrying is produced the device of alumina clinker.
Background technology
Present domestic sintering process is produced alumina clinker and is adopted wet processing, and the raw material water ratio of going into kiln is up to 39%; Because material heat exchange in the wet-process rotary kiln kiln is poor, unit volume grog production capacity is low, and thermo-efficiency is low, the about 6280MJ(1500MCal of heat that the grog of sintering 1t consumes) about, not only wastes a large amount of energy, required the specification of rotary kiln to strengthen simultaneously, floor space is big, and investment increases.
Summary of the invention
At existing wet production alumina clinker cost problem of higher, the utility model provides a kind of semidrying to produce the device of alumina clinker.
The device that a kind of semidrying of the present utility model is produced alumina clinker mainly comprises rotary kiln, cooler, burner, cyclonic separator, dust-precipitator, drying crusher, transfer roller, lift, filler bin, slip steel basin and hotblast stove; Wherein be provided with three cyclonic separators between rotary kiln and dust-precipitator and the drying crusher, a cyclonic separator is as fly-ash separator, two other cyclonic separator is respectively as first stage suspension preheater and secondary suspended preheater, the air outlet of rotary kiln is communicated with the discharge port of first stage suspension preheater and the inlet mouth of secondary suspended preheater by pipeline simultaneously, the opening for feed of rotary kiln is communicated with by the discharge port of pipeline with the secondary suspended preheater, and the air outlet of secondary suspended preheater is communicated with the inlet mouth of first stage suspension preheater and the discharge port of fly-ash separator by pipeline simultaneously; The inlet mouth of fly-ash separator is communicated with the air outlet of drying crusher by pipeline, and the air outlet of fly-ash separator is communicated with the inlet mouth of dust-precipitator by pipeline; The air outlet of first stage suspension preheater is communicated with the inlet mouth of drying crusher by pipeline, and the pipeline that the first stage suspension preheater is connected with drying crusher also is communicated with the air outlet of hotblast stove.
In the said apparatus, be respectively equipped with an air valve on the pipeline of the discharge port below of first stage suspension preheater, secondary suspended preheater and fly-ash separator, the pipeline that extend the air valve below of fly-ash separator is communicated with first stage suspension preheater and secondary suspended preheater respectively, and the pipeline that extend the air valve below of first stage suspension preheater is communicated with secondary suspended preheater and rotary kiln respectively.
In the said apparatus, the inlet mouth of rotary kiln is communicated with the outlet of rotary kiln burner, and the blast inlet of rotary kiln burner is communicated with a gas blower; The discharge port of rotary kiln is communicated with cooler.
In the said apparatus, the inlet mouth of hotblast stove is communicated with a blower export, and the opening for feed of hotblast stove is communicated with hot-blast stove gas burner, and this blower export is communicated with the blast inlet of hot-blast stove gas burner simultaneously.
In the said apparatus, the opening for feed of drying crusher is communicated with the discharge port of worm conveyor, and the pipeline that both are communicated with is provided with air valve, and the opening for feed of worm conveyor is communicated with filler bin and slip steel basin respectively; The pipeline that worm conveyor is communicated with filler bin is provided with feeding machine, and the pipeline that is communicated with between feeding machine and the filler bin is provided with flap type; Worm conveyor is provided with magnetic flow meter with the pipeline that the slip steel basin is communicated with, and the pipeline between magnetic flow meter and the slip steel basin is provided with electronic slurry valve.
The air outlet of dust-precipitator is communicated with by the import of pipeline with an induced draft fan in the said apparatus, and the outlet of this induced draft fan is communicated with chimney; Several discharge ports of dust-precipitator are communicated with the import of several primary conveyor, be equipped with air valve on the pipeline that both are communicated with, the outlet of each primary conveyor is communicated with the import of a two-stage conveying machine simultaneously, the outlet below of two-stage conveying machine is the import of lift, and the outlet below of lift is a filler bin.
Above-mentioned burner is multicenter combustor or single passage burner.
Above-mentioned dust-precipitator is dust precipitator or bag filter.
Above-mentioned cooler is rotary type single cylinder cooling machine, grate cooler or planetary cooler.
Above-mentioned gas blower is Root's blower or centrifugal blower.
The length-to-diameter ratio of above-mentioned rotary kiln (length/diameter) is 15 ~ 18.
The angle of taper of the cone of the bottom of above-mentioned cyclonic separator is 65 ~ 75 degree.
Above-mentioned worm conveyor is the powerful mixing worm conveyor, and the pitch of its blade is varying pitch, and pitch is along material delivery direction or increase gradually in the other direction.
The method of work of device of the present utility model is:
1, by being arranged on the roto-sifter of slip steel basin top, raw material is sieved, the slip that sifts out enters the slip steel basin, and the impurity that sifts out discards; The slip steel basin stirs material, make material and water be mixed into the wet stock of water weight content 35 ~ 40%, again the outlet of wet stock from the slip steel basin is discharged to the worm conveyor, worm conveyor is transported to wet stock in the drying crusher, wet stock and hot blast fully carry out heat exchange under the effect of hot-blast stove gas burner and gas blower, wet stock is broken up by oven dry gradually, moisture≤1% wherein, the dry material of temperature≤200 ℃ by pipeline transmission in fly-ash separator;
2, fly-ash separator separates dry material, the material that settles down after the separation enters the first stage suspension preheater by pipeline, the first stage suspension preheater is proceeded material to separate, material behind the separate and subside enters the secondary suspended preheater, the secondary suspended preheater is proceeded material to separate, and the settled material in separation back enters rotary kiln and carries out sintering; It is that 800 ~ 900 ℃ grog enters cooler that sintering is made temperature, in cooler, be blown into freezing air by gas blower, material and freezing air carry out heat exchange postcooling to 150 ~ 180 ℃, heated 450 ~ 550 ℃ of air admission rotary kilns of while, rotary kiln burner is blown into warm air in the rotary kiln by gas blower material is carried out sintering simultaneously;
3, gas that sintering produces in the rotary kiln and dust be discharged into from the air outlet in the pipeline between the opening for feed of the discharge port of first stage suspension preheater and secondary suspended preheater with and mixing of materials; Gas and dust that the first stage suspension preheater produces are discharged in the drying crusher from the air outlet, and to gas in the pipeline and dust heating, heated gas is in the same place with the mixing of materials in dust and the drying crusher by hotblast stove; Gas that the secondary suspended preheater produces and dust be discharged into from the air outlet in the pipeline between the opening for feed of the discharge port of fly-ash separator and first stage suspension preheater and and mixing of materials; The gas and the dust that produce in the fly-ash separator are discharged into the dust-precipitator from the air outlet;
4, the dust of process dust-precipitator collection is sent on the lift by the primary conveyor and the two-stage conveying machine of bottom, be sent in the filler bin through lift, feeding machine by the filler bin bottom is sent on the worm conveyor again, with the mixing of materials that from the slip steel basin, sends together, be sent in the drying crusher through screw conveyer;
5, collecting the waste gas that forms behind the dust in the dust-precipitator is sent in the chimney by induced draft fan.
In the aforesaid method, the discharge port material temperature of secondary suspended preheater is 650 ~ 700 ℃.
Device of the present utility model is provided with two suspended preheaters at rotary kiln, two preheaters can be recycled the production capacity that improves kiln to grog or the raw material that discharge in the gas air outlet of kiln tail, simultaneously the heat of kiln tail discharge gas is also reclaimed, the supply drying crusher is used for oven dry and breaks up gas, has reduced the heat exhaustion by hotblast stove; Prepare alumina clinker with wet method and compare, device of the present utility model can significantly reduce the consumption of energy, reduces and pollutes, save cost, the contraction in length 20 ~ 25% of the required rotary kiln of preparation equal amts product, production capacity improves 30 ~ 50%, and energy consumption of unit product reduces more than 30%; Compare with the dried preparation alumina clinker, device of the present utility model does not need traditional equipment is transformed in a large number, adopts simple adjustment of existing equipment just can finish, and has easy to operate, simple and practical effect.
Description of drawings
Fig. 1 is the structural representation that semidrying of the present utility model is produced the device of alumina clinker;
Among the figure 1, rotary kiln, 2, cooler, 3, rotary kiln burner, 4, the rotary kiln gas blower, 5, drying crusher, 6, the secondary suspended preheater, 7, the first stage suspension preheater, 8, fly-ash separator, 9, hotblast stove, 10, the hotblast stove gas blower, 11, hot-blast stove gas burner, 12, first air valve, 13, worm conveyor, 14, under meter, 15, electronic slurry valve, 16, feeding machine, 17, flap type, 18, filler bin, 19, the slip steel basin, 20, roto-sifter, 21, lift, 22, primary conveyor, 23, the two-stage conveying machine, 24, the dust precipitator air valve, 25, dust precipitator, 26, first loop expansion pipe, 27, the induced draft fan valve, 28, induced draft fan, 29, chimney, 30, second loop expansion pipe, 31, second air valve, 32, the 3rd loop expansion pipe, 33, the 4th loop expansion pipe, 34, the 3rd air valve, 35, the 5th loop expansion pipe, 36, the 6th loop expansion pipe, 37, the 4th air valve, 38, the 7th loop expansion pipe, 39, the 8th loop expansion pipe, 40, outside valve, 41 of connecting, the cooler gas blower.
Embodiment
The raw material that adopts among the utility model embodiment is Bayer process red mud, Wingdale and ground caustic circulation alkali liquor mixture;
The angle of taper of the cone of the first stage suspension preheater among the utility model embodiment, secondary suspended preheater and fly-ash separator bottom is respectively 65 degree, 67.5 degree and 75 degree;
Rotary kiln specification among the utility model embodiment is Φ 4.0 * 70 m, length-to-diameter ratio 17.5;
The specification of the first stage suspension preheater among the utility model embodiment is Φ 5630 * 11702 mm;
The specification of the secondary suspended preheater among the utility model embodiment is Φ 6080 * 12428 mm;
The specification of the fly-ash separator among the utility model embodiment is Φ 5786 * 14722 mm;
The thermal value of the hotblast stove among the utility model embodiment is 175 * 10 5KCal/h(700 ℃);
The specification of the drying crusher among the utility model embodiment is Φ 4250 * 2500 mm;
The dust-precipitator that adopts among the utility model embodiment is a dust precipitator, and specification is 160 m 2
The specification of the roto-sifter among the utility model embodiment is Φ 1200mm;
The specification of the slip steel basin among the utility model embodiment is Φ 6000 * 8000 mm;
Cooler among the utility model embodiment is monotubular formula revolution cooler, and specification is Φ 4000 * 45000 mm;
The air quantity that enters rotary kiln from the rotary kiln gas blower among the utility model embodiment accounts for and all enters 6 ~ 8% of rotary kiln air quantity cumulative volume;
The specification of second loop expansion pipe among the utility model embodiment, the 3rd loop expansion pipe, the 4th loop expansion pipe and the 7th loop expansion pipe is respectively Φ 600mm, Φ 3200mm, Φ 600mm and Φ 3100mm;
Worm conveyor among the utility model embodiment is the powerful mixing worm conveyor, and the pitch of its blade is varying pitch, increases gradually along material delivery direction pitch;
Gas blower among the utility model embodiment is a Root's blower;
Second air valve among the utility model embodiment and the specification of the 3rd air valve are Φ 600 mm;
The fuel that each burner among the utility model embodiment adopts is solid fuel, geseous fuel or liquid fuel, and the burner of employing is the single passage burner;
The alumina clinker that semidrying among the utility model embodiment is produced the device of alumina clinker has a daily output of 144t.
Embodiment 1
The apparatus structure of semidrying production alumina clinker comprises rotary kiln 1, cooler 2, rotary kiln burner 3, cyclonic separator, dust precipitator 25, drying crusher 5, worm conveyor 13, primary conveyor 22, lift 21, filler bin 18, two-stage conveying machine 23, slip steel basin 19 and hotblast stove 9 as shown in Figure 1; Wherein be provided with three cyclonic separators between rotary kiln 1 and dust precipitator 25 and the drying crusher 5, a cyclonic separator is as fly-ash separator 8, two other cyclonic separator is respectively as first stage suspension preheater 7 and secondary suspended preheater 6, the air outlet of rotary kiln 1 is communicated with the discharge port of first stage suspension preheater 7 and the inlet mouth of secondary suspended preheater 6 by pipeline simultaneously, the opening for feed of rotary kiln 1 is communicated with by the discharge port of pipeline with secondary suspended preheater 6, and the air outlet of secondary suspended preheater 6 is communicated with the inlet mouth of first stage suspension preheater 7 and the discharge port of fly-ash separator 8 by pipeline simultaneously; The inlet mouth of fly-ash separator 8 is communicated with by the air outlet of pipeline with drying crusher 5, and the air outlet of fly-ash separator 8 is communicated with by the inlet mouth of pipeline with dust precipitator 25; The air outlet of first stage suspension preheater 7 is communicated with by the inlet mouth of pipeline with drying crusher 5, and the pipeline that first stage suspension preheater 7 is connected with drying crusher 5 also is communicated with the air outlet of hotblast stove 9;
In the said apparatus, be respectively equipped with the 3rd air valve 34, second air valve 31 and the 4th air valve 37 on the pipeline of the discharge port below of first stage suspension preheater 7, secondary suspended preheater 6 and fly-ash separator 8, the pipeline that extend the 4th air valve 37 belows is communicated with the pipeline that extends 6, the three air valves, 34 belows respectively and is communicated with secondary suspended preheater 6 and rotary kiln 1 respectively with first stage suspension preheater 7 and secondary suspended preheater;
In the said apparatus, the inlet mouth of rotary kiln 1 is communicated with the outlet of rotary kiln burner 3, and the blast inlet of rotary kiln burner 3 is communicated with rotary kiln gas blower 4; The discharge port of rotary kiln 1 is communicated with cooler 2;
In the said apparatus, the inlet mouth of hotblast stove 9 is communicated with 10 outlets of hotblast stove gas blower, and the opening for feed of hotblast stove 9 is communicated with hot-blast stove gas burner 11, and 10 outlets of hotblast stove gas blower also are communicated with the blast inlet of hot-blast stove gas burner 11 simultaneously;
In the said apparatus, the opening for feed of drying crusher 5 is communicated with the discharge port of worm conveyor 13, and the pipeline that both are communicated with is provided with first air valve 12, the opening for feed of worm conveyor 13 RespectivelyBe communicated with filler bin 18 and slip steel basin 19; The pipeline that worm conveyor 13 is communicated with filler bin 18 is provided with feeding machine 16, and the pipeline that is communicated with between feeding machine 16 and the filler bin 18 is provided with flap type 17; The pipeline that worm conveyor 13 is communicated with slip steel basin 19 is provided with magnetic flow meter 14, and the pipeline between magnetic flow meter 14 and the slip steel basin 19 is provided with electronic slurry valve 15;
The air outlet of dust precipitator 25 is communicated with by the import of pipeline with induced draft fan 28, and the outlet of induced draft fan 28 is communicated with chimney 29; Several discharge ports of dust precipitator 25 are communicated with the import of several primary conveyor 24, the pipeline that both are communicated with is provided with dust precipitator air valve 24, the outlet of each primary conveyor 24 is communicated with the import of a two-stage conveying machine 23 simultaneously, the outlet below of two-stage conveying machine 23 is the import of lift 21, and the outlet below of lift 21 is a filler bin 18;
Pipeline between dust precipitator 25 and the induced draft fan 28 is provided with first loop expansion pipe 26 and induced draft fan valve 27;
Pipeline between dust precipitator 25 and the fly-ash separator 8 is provided with the 8th loop expansion pipe 39;
Pipeline between first stage suspension preheater 7 and the rotary kiln 1 is provided with the 3rd loop expansion pipe 32 and the 4th loop expansion pipe 33;
Pipeline between first stage suspension preheater 7 and the drying crusher 5 is provided with the 7th loop expansion pipe 38;
Pipeline between secondary suspended preheater 6 and the rotary kiln 1 is provided with second loop expansion pipe 30;
The pipeline that fly-ash separator 8 is communicated with first stage suspension preheater 7 is provided with the 6th loop expansion pipe 36, and the pipeline that fly-ash separator 8 is communicated with drying crusher 5 is provided with the 5th loop expansion pipe 35;
Adopt said apparatus to compare with wet method, the contraction in length 20 ~ 25% of the required rotary kiln of preparation equal amts alumina clinker, production capacity improves 30 ~ 50%, and energy consumption of unit product reduces more than 30%.

Claims (4)

1. the device of a semidrying production alumina clinker comprises rotary kiln, cooler, burner, cyclonic separator, dust-precipitator, drying crusher, transfer roller, lift, filler bin, slip steel basin and hotblast stove; It is characterized in that: be provided with three cyclonic separators between rotary kiln and dust-precipitator and the drying crusher, a cyclonic separator is as fly-ash separator, two other cyclonic separator is respectively as first stage suspension preheater and secondary suspended preheater, the air outlet of rotary kiln is communicated with the discharge port of first stage suspension preheater and the inlet mouth of secondary suspended preheater by pipeline simultaneously, the opening for feed of rotary kiln is communicated with by the discharge port of pipeline with the secondary suspended preheater, and the air outlet of secondary suspended preheater is communicated with the inlet mouth of first stage suspension preheater and the discharge port of fly-ash separator by pipeline simultaneously; The inlet mouth of fly-ash separator is communicated with the air outlet of drying crusher by pipeline, and the air outlet of fly-ash separator is communicated with the inlet mouth of dust-precipitator by pipeline; The air outlet of first stage suspension preheater is communicated with the inlet mouth of drying crusher by pipeline, and the pipeline that the first stage suspension preheater is connected with drying crusher also is communicated with the air outlet of hotblast stove.
2. a kind of semidrying according to claim 1 is produced the device of alumina clinker, it is characterized in that being respectively equipped with an air valve on the pipeline of discharge port below of first stage suspension preheater, secondary suspended preheater and fly-ash separator, the pipeline that extend the air valve below of fly-ash separator is communicated with first stage suspension preheater and secondary suspended preheater respectively, and the pipeline that extend the air valve below of first stage suspension preheater is communicated with secondary suspended preheater and rotary kiln respectively.
3. a kind of semidrying according to claim 1 is produced the device of alumina clinker, the opening for feed that it is characterized in that drying crusher is communicated with the discharge port of worm conveyor, the pipeline that both are communicated with is provided with air valve, and the opening for feed of worm conveyor is communicated with filler bin and slip steel basin respectively; The pipeline that worm conveyor is communicated with filler bin is provided with feeding machine, and the pipeline that is communicated with between feeding machine and the filler bin is provided with flap type; Worm conveyor is provided with magnetic flow meter with the pipeline that the slip steel basin is communicated with, and the pipeline between magnetic flow meter and the slip steel basin is provided with electronic slurry valve.
4. a kind of semidrying according to claim 1 is produced the device of alumina clinker, it is characterized in that the air outlet of dust-precipitator is communicated with by the import of pipeline with an induced draft fan, and the outlet of this induced draft fan is communicated with chimney; Several discharge ports of dust-precipitator are communicated with the import of several primary conveyor, be equipped with air valve on the pipeline that both are communicated with, the outlet of each primary conveyor is communicated with the import of a two-stage conveying machine simultaneously, the outlet below of two-stage conveying machine is the import of lift, and the outlet below of lift is a filler bin.
CN2011200528758U 2011-03-03 2011-03-03 Device for producing alumina clinker in semidry method Expired - Lifetime CN202016883U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102538493A (en) * 2012-02-15 2012-07-04 个旧市富祥工贸有限责任公司 Device for using waste heat of high-temperature smoke of bath smelting furnace directly
CN105271353A (en) * 2015-09-23 2016-01-27 内蒙古生一伦稀土材料有限责任公司 Calcination method for raising daily output of rare earth carbonate
CN106115752A (en) * 2016-06-18 2016-11-16 江西中旭科技有限公司 A kind of activated alumina process units and technique

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102538493A (en) * 2012-02-15 2012-07-04 个旧市富祥工贸有限责任公司 Device for using waste heat of high-temperature smoke of bath smelting furnace directly
CN102538493B (en) * 2012-02-15 2014-04-09 个旧市富祥工贸有限责任公司 Device for using waste heat of high-temperature smoke of bath smelting furnace directly
CN105271353A (en) * 2015-09-23 2016-01-27 内蒙古生一伦稀土材料有限责任公司 Calcination method for raising daily output of rare earth carbonate
CN105271353B (en) * 2015-09-23 2017-01-18 北方稀土生一伦高科技有限公司 Calcination method for raising daily output of rare earth carbonate
CN106115752A (en) * 2016-06-18 2016-11-16 江西中旭科技有限公司 A kind of activated alumina process units and technique

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