CN104131158B - A kind of folded formula recirculating fluidized bed gasification magnetizing roasting device and technique - Google Patents
A kind of folded formula recirculating fluidized bed gasification magnetizing roasting device and technique Download PDFInfo
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- CN104131158B CN104131158B CN201410344381.5A CN201410344381A CN104131158B CN 104131158 B CN104131158 B CN 104131158B CN 201410344381 A CN201410344381 A CN 201410344381A CN 104131158 B CN104131158 B CN 104131158B
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- 238000002309 gasification Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000003134 recirculating effect Effects 0.000 title claims abstract description 17
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims abstract description 29
- 230000005415 magnetization Effects 0.000 claims abstract description 24
- 239000003245 coal Substances 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 50
- 229910052742 iron Inorganic materials 0.000 claims description 25
- 239000000843 powder Substances 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 10
- 238000007885 magnetic separation Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 6
- 239000003546 flue gas Substances 0.000 claims description 6
- 239000002817 coal dust Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 3
- 238000006297 dehydration reaction Methods 0.000 claims description 3
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- 239000004744 fabric Substances 0.000 claims description 3
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- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000006722 reduction reaction Methods 0.000 description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000005243 fluidization Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
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- 238000005516 engineering process Methods 0.000 description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 3
- 230000035755 proliferation Effects 0.000 description 3
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- 239000002075 main ingredient Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
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- 235000003283 Pachira macrocarpa Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001083492 Trapa Species 0.000 description 1
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- LFYJSSARVMHQJB-QIXNEVBVSA-N bakuchiol Chemical compound CC(C)=CCC[C@@](C)(C=C)\C=C\C1=CC=C(O)C=C1 LFYJSSARVMHQJB-QIXNEVBVSA-N 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
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- 229910052683 pyrite Inorganic materials 0.000 description 1
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- 229910021646 siderite Inorganic materials 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Crucibles And Fluidized-Bed Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a kind of folded formula recirculating fluidized bed gasification magnetizing roasting device and roasting technique, it is by recycled offgas to be sent into the cfentrifugal blower of gasification furnace together with air, feeder, body of heater and high temperature cyclone separator and the loopback of material valve group of gasifying into circle fluidized-bed gasification furnace, fluosolids roasting body of heater and high temperature cyclone separator and loopback of material valve group into ciculation fluidized magnetization roasting furnace, venturi type preheater, lower exhaust high-temperature separator, raw material cabin, swinging residual heat drying machine, pulse bag type dust collector, centrifugal type draught fan forms, the circle fluidized-bed gasification furnace is superimposed with ciculation fluidized magnetization roasting furnace or arranged in series.Present invention process suits each stage in roasting technique, mixes suitable equipment and is folded connection, realizes optimization, efficient, energy-conservation technological parameter；Air is equipped with as coal gasification agent using partial tail gas simultaneously, to realize emission reduction and recovery waste heat.
Description
Technical field
It is more particularly to a kind of applied to coal gasification and the magnetizing roast of poor iron ore the present invention relates to chemical industry, field of metallurgy
Technique and device.
Background technology
The average grade of China's iron ore is only 33%, about lower than current International Iron Ore stone supply big country average grade
20%.China's iron ore 90% is above is lean ore, and with continuous exploitation, high-grade rich ore starts exhaustion occur.Due to market
The growth of demand, iron ore of low ore grade and compound symbiotic ore are just provided with very big extraction value, and will turn into and develop in the future
Direction.This kind of iron ore mainly has siderite, limonite, bloodstone, water chestnut magnetic iron ore and pyrite burning slag, rich ore magnetic separation
Remaining mine tailing etc..
For Low-grade and hard-to-separate iron ore stone, can not be effectively treated using flotation, gravity treatment or the high intensity magnetic separation method of routine,
And cause substantial amounts of waste and environmental pollution.Such ore is calcined using reduction magnetization, Fe2O3 is generated into Fe3O4, is changed into
Can magnetic separation iron ore, to improve efficiency of magnetic separation and iron yield.This is into the common recognition of industry.
Reduction magnetization roasting has using modes such as shaft furnace, rotary kiln, fluidized bed furnace, ciculation fluidized roasting, suspension flash roastings.
Wherein because of fluosolids roasting technique (fluidized bed furnace, suspension flash, ciculation fluidized roasting) mass-and heat-transfer efficiency high, energy consumption is far below perpendicular
Kiln, rotary kiln and enjoy high praise.Substantial amounts of research has all been carried out to the roasting of fluidization reduction magnetization both at home and abroad.Chiba, Japan Kawasaki
Iron company is respectively that bloodstone progress of 30,141,162,101 μm of Iron grades more than 60% is hot with four kinds of average grain diameters
Circulating fluidization reduction research.Tokyo iron and steel institute new technology research center is using bubble type fluid bed to 10-30% product
Position 0.25mm particulate iron ore and several millimeters of coarse grain iron ore are tested.China is in the sixties in last century, Chinese section
Chemical industry Institute of Metallurgical Technology of institute and mine research institute of Ma'an Mountain have built the ton day fluidization Roasting of China's First 100 jointly
Burn pilot test system.The seventies, mine research institute of Ma'an Mountain are injected directly into fluidized bed furnace as reducing agent using coal dust to carry out
Magnetizing roast is fluidized, also achieves certain achievement.The whirlwind flash magnetization roasting stove of also remaining in recent years forever rich academician's invention
Important breakthrough is obtained to handle oolitic hematite, the device can more shorten roasting time than other reduction roastings.
The existing iron ore using coal as direct reducer, which is fluidized in magnetic roasting process, has following deficiency：1) profit of carbon
It is low with rate, high energy consumption.In the existing technique for mixing coal directly as reducing agent and ore, coal combustion, gasification and ore
Reduction reaction carried out in same device, each parameter can not be made to reach optimization；Can not be same in terms of coal consumption with the magnetization rate of recovery
When reach optimal.It is existing by same device be divided into gasification, reduction roasting, waste heat recovery unit mode in, it is simply simple
Connected after being split with fluidization technique to each unit on ground；Most suitable corollary equipment, and energy are not found for each operating unit
Organically coordinate to get up.Thus, independent operating unit reduces part energy consumption, adds technique compared to directly mixed mode seemingly
Performance-adjustable, efficiency of carbon con version but can not be thoroughly improved, reduce energy consumption.2) discharge capacity of system carbon and gas is high, material with
Energy regenerating is using not enough.Coal is as in the iron ore fluidisation magnetic roasting process of reducing agent at present, and coal is in gasification unit
Gasifying agent-water vapour is provided by steam generator or waste heat boiler；And CO2 and drying process are produced in magnetizing roast
In caused H2O steam, be largely drained, carbon can not realize effective circulation.This not only wastes heat energy, adds production
Cost, and cause very big burden to atmospheric environment.3) SR is big, and horizontal mass-and heat-transfer is inadequate in fluo solid roaster.Nothing
By being multistage suspension magnetizing roast, or multistage fluidized roasting, all deposit system running resistances are big, thus production cost is higher.
General fluid bed axial direction high cycle speed, material back-mixing is strong, is advantageous to the diffusion of reducing gas and material；But fluid bed empir-ical formulation
Poor, gas is low with the horizontal proliferation speed of material.This have impact on the magnetization efficiency of reactor and the uniformity of product, thus by force
Change the lateral diffusion-capability of fluid bed material, homogenizing product quality is necessary.
The content of the invention
The present invention is in view of the shortcomings of the prior art, it is proposed that a kind of folded formula recirculating fluidized bed gasification-magnetic roasting process
And device, to realize that coal is fully utilized；Recovery magnetization, as gasifying agent, realizes recycling, subtracting for carbon with dried tail gas
Row and the purpose of energy-conservation；The running resistance of fluosolids roasting system is reduced, is homogenized the quality and magnetization efficiency of product.Magnetizing roast work
Skill and device, to realize that coal is fully utilized；Recovery magnetization with dried tail gas as gasifying agent, realize the recycling of carbon,
Emission reduction and the purpose of energy-conservation；The running resistance of fluosolids roasting system is reduced, is homogenized the quality and magnetization efficiency of product.
The technical proposal of the invention is realized in this way：
The invention further relates to a kind of folded formula recirculating fluidized bed gasification-magnetizing roasting device, it by by recycled offgas with it is empty
Gas is sent into the cfentrifugal blower of gasification furnace, feeder, gasification body of heater and high temperature cyclone separator and loopback of material valve group together
Into circle fluidized-bed gasification furnace, fluosolids roasting body of heater and high temperature cyclone separator and loopback of material valve group into ciculation fluidized magnetic
Change roaster, venturi type preheater, lower exhaust high-temperature separator, raw material cabin, swinging residual heat drying machine, impulse bag remove
Dirt device, centrifugal type draught fan composition, the circle fluidized-bed gasification furnace is superimposed with ciculation fluidized magnetization roasting furnace or arranged in series,
The lower exhaust high-temperature separator side sets raw material cabin, and the raw material cabin connects swinging residual heat drying machine, the revolution
Formula residual heat drying machine connects pulse bag type dust collector, and centrifugal type draught fan is set above the pulse bag type dust collector.
Circle fluidized-bed gasification furnace bottom described in the cfentrifugal blower face, the circle fluidized-bed gasification furnace sidepiece
It is connected with fluosolids roasting body of heater thereon, the fluosolids roasting body of heater side connects high temperature cyclone separator, and opposite side sets institute
Lower exhaust high-temperature separator is stated, the venturi type preheater, the venturi are set above the high temperature cyclone separator
Formula preheater connects sealed screw(-type) feeder.
The fluosolids roasting body of heater, without cloth harden structure, sets several swirl diffusers, supplying one in back taper in the middle part of body of heater
Tail gas is quantified to strengthen the curl of fluid field in furnace so that the extended residence time in miberal powder in stove, strengthening flow and miberal powder connect
Touch, improve the intensity and efficiency of reduction reaction, be homogenized the quality of product.
The purpose that the present invention is reached by said apparatus is the reduction magnetization roasting point of one side coal gasification and iron ore
Not in independent ciculation fluidized gasification furnace with being carried out in ciculation fluidized magnetization roasting furnace；
On the other hand, both to form set of device by overlapping or connecting, and the preheating of material is in venturi type preheater, thing
The drying of material is carried out in swinging residual heat drying machine so that gasification, reduction magnetization, preheating, dry each rank in roasting process
Section, all carried out in the equipment for being best suitable for technique, with the optimization of realization device technological parameter, and pass through material flow and flue gas
Stream is folded to be linked togather, and realizes that emission reduction is calcined with energy-conservation.
A further object of the present invention is to utilize roasting and dried tail gas (Main Ingredients and Appearance CO2、H2O) with air together, make
For gasifying agent of the coal in gasification, steam generation or waste heat boiler when removing traditional gasification, to realize that the emission reduction of system saves.
A further object of the present invention is that the operation resistance of system is reduced by the structure design to ciculation fluidized magnetization roasting furnace
Power；The horizontal proliferation of enhancing roasting air-flow, magnetize the efficiency of reaction and the uniformity of product to improve.
The invention further relates to above-mentioned folded formula recirculating fluidized bed gasification-magnetizing roast, is realized especially by following manner：
(1) after magnetizing roast by preheating, dried partial tail gas CO2, H2O and air together as gasifying agent, warp
It is sent into by cfentrifugal blower in ciculation fluidized gasification furnace, the coal dust being sent into feeder enters promoting the circulation of qi in ciculation fluidized gasification furnace
Change；
(2) coal dust is fed again into gasification furnace after high temperature cyclone separator separates through loopback of material valve, is achieved and is followed
Ring, gas caused by gasification are entered by fluosolids roasting body of heater bottom of the back taper in circulating fluidized bed roasting furnace without air distribution plate；
(3) to being sent into the miberal powder in stove after being collected via Venturi preheater preheating and inferior discharge, flowed
Change reduction roasting；Miberal powder is realized by high-temperature separator and loopback of material valve to be circulated in fluo solid roaster；Being obtained after roasting can
The iron ore concentrate of magnetic separation, while heat smoke caused by being calcined is carried out after miberal powder separates with flue gas through lower exhaust high-temperature separator, cigarette
Gas, which enters in swinging residual heat drying machine, original ore powder is dried dehydration, and thus obtained tail gas is net through pulse bag type dust collector
After change, a part recycles as gasifying agent, a part of then emptied through centrifugal type draught fan.
Further, operation temperature is 900-1100 DEG C to the ciculation fluidized gasification furnace in stove at ambient pressure；Ciculation fluidized magnetic
Change roaster operation temperature at 700-900 DEG C, material mean residence time in stove reaches 30-60min；Emission dust-laden is dense
Degree is less than 50mg/m3,90-100 DEG C of the temperature of emission.
The ciculation fluidized gasification furnace is to fine coal using tail gas CO2, the H2O and air being recycled back to together as gasifying agent
Gasified.
The invention has the advantages that compared with prior art, advantages of the present invention is as follows：
(1) two relatively independent ciculation fluidized gasification furnace and ciculation fluidized magnetization roasting furnace, which are folded, to be linked togather, wherein dividing
Carry out gasification reaction and reduction roasting so that the different phase of roasting separates to operate.Realize gasification-magnetizing roast work
The optimization of skill, while also realize and carried out the optimization of device structure for technique different phase.
(2) Process operating parameters of optimization and the equipment of optimization structure, can well realize and save and improve the profit of coal
The rate of recovery of rate and iron.Wherein for the conversion ratio of coal up to 98%, iron recovery is more than 90%.
(3) need not be set up together as coal gasification agent, gasification furnace with recycled offgas (Main Ingredients and Appearance CO2, H2O) and air
Steam generation gas or waste heat boiler.This not only reduces equipment investment, it is often more important that realize carbon recycle with tail gas more than
The recovery of heat, emission reduction and the effect of energy-conservation are reached.
(4) back taper of ciculation fluidized magnetizing roast body of heater is furnished with 3-4 swirl diffuser without air distributor structure and middle part
Design, significantly reduces the running resistance of system, while also improve the gas-solid in stove compared with conventional multi-level fluidization technique
Contact, add the residence time of material, be homogenized product quality.
(5) this not only independent but also associated operational mode of roasting technique and device, it is easy to carry out production management and fortune
The regulation and control of row parameter.Influence of the fluctuation of the management cost and raw ore material, raw coal quality of operation to production all greatly reduces.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the folded connection formula recirculating fluidized bed gasification-magnetizing roasting device of the present invention and reaction process schematic diagram.
Fig. 2 is partial device structures schematic diagram of the present invention.
In figure, 01, iron ore concentrate, 02, raw material miberal powder, 03, air, 04, tail gas, 05, emptying tail gas, 06, fine coal, 07, pre-
Miberal powder after heat；1st, cfentrifugal blower, 2, feeder, 3, circle fluidized-bed gasification furnace, 4, fluosolids roasting body of heater, 5, high temperature rotation
Wind separator, 6, swirl diffuser, 7, lower exhaust high-temperature separator, 8, venturi type preheater, 9, sealed screw(-type) feeder,
10th, material buffer rifle, 11, elevator, 12, raw material cabin, 13, centrifugal type draught fan, 14, pulse bag type dust collector, 15, swinging
Residual heat drying machine, 16, gasifying agent distributor.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Reference picture 1, a kind of folded formula recirculating fluidized bed gasification-magnetizing roasting device, by by recycled offgas together with air
Be sent into the cfentrifugal blower 1 of gasification furnace, feeder 2, gasification body of heater and high temperature cyclone separator 5 and loopback of material valve group into
Circle fluidized-bed gasification furnace 3, fluosolids roasting body of heater 4 and high temperature cyclone separator 5 and loopback of material valve group into ciculation fluidized magnetic
Change roaster, venturi type preheater 8, lower exhaust high-temperature separator 7, raw material cabin 12, swinging residual heat drying machine 15, pulse
Sack cleaner 14, centrifugal type draught fan 13 are formed, and the circle fluidized-bed gasification furnace 3 both may be used with ciculation fluidized magnetization roasting furnace
Superposition again can arranged in series.
1 face circle fluidized-bed gasification furnace of cfentrifugal blower 3 bottom, the sidepiece of circle fluidized-bed gasification furnace 3 with thereon
Fluosolids roasting body of heater 4 connects, and the side of fluosolids roasting body of heater 4 connection high temperature cyclone separator 5, opposite side sets the lower exhaust
High-temperature separator 7, the top of high temperature cyclone separator 5 set the venturi type preheater 8, and the venturi type preheater 8 connects
Sealed screw(-type) feeder 9 is connect, material buffer warehouse 10 is installed on the top of sealed screw(-type) feeder 9, material buffer warehouse 10
Side sets elevator 11.
The lower side of exhaust high-temperature separator 7 sets raw material cabin 12, and the raw material cabin 12 connects swinging residual heat drying machine
15.Swinging residual heat drying machine 15 connects pulse bag type dust collector 14, and the top of pulse bag type dust collector 14 sets centrifugal air inducing
Machine 13.
Fluosolids roasting body of heater 4, without cloth harden structure, multiple swirl diffusers is set in the middle part of body of heater, are incorporated a certain amount of in back taper
Tail gas is to strengthen the curl of fluid field in furnace so that the extended residence time in miberal powder in stove, contact of the strengthening flow with miberal powder, carries
The intensity and efficiency of high reduction reaction, it is homogenized the quality of product.This back taper considerably reduces without air distributor structure design
Running resistance after two recirculating fluidized bed superpositions or series connection, while coordinate the swirl diffuser of design in the middle part of body of heater to be flowed to be homogenized
Field, strengthen horizontal proliferation.
The invention further relates to a kind of folded formula recirculating fluidized bed gasification-magnetic roasting process, comprise the following steps that：
Fine coal is sent into circle fluidized-bed gasification furnace 3 by feeder 2；Followed by magnetizing roast, preheating, dried part
Ring tail gas, together as gasifying agent, is sent into circle fluidized-bed gasification furnace 3 via cfentrifugal blower 1 with air, carries out coal
Circulating fluidization atmospheric gasification, gasification temperature are 900-1100 DEG C, and efficiency of carbon con version reaches 98%.Gas caused by gasification, from following
Fluosolids roasting body of heater 4 bottom of the back taper without air distribution plate enters in ring fluidized-solids roaster.
To via venturi type preheater 8 preheat and inferior discharge 7 collect after be sent into stove in miberal powder, flowed
Change reduction roasting.Wherein some recycled offgas is filled into be formed in stove by swirl diffuser and revolved in the middle part of fluosolids roasting body of heater 4
Stream, 700-900 DEG C of reduction roasting temperature；Miberal powder is realized by high-temperature separator and loopback of material valve to be circulated in roaster, ore deposit
Powder is in residing time in furnace 30-60min., can be by changing miberal powder in ciculation fluidized roasting according to the baking property of different miberal powders
Circulating ratio in stove, to adjust the Best Times that miberal powder stops in stove.Obtained after roasting can magnetic separation iron ore concentrate, iron recovery
Rate is more than 90%.Meanwhile the heat smoke isolated after roasting through high temperature cyclone separator 5 enters venturi type preheater 8 to drying
Material after dry is preheated；After the completion of preheating in lower exhaust high-temperature separator 7, collection material (miberal powder) and progress flue gas
Separation.The material of collection is sent into fluosolids roasting body of heater 4, and the flue gas of separation then enters in swinging residual heat drying machine 15 to raw ore
Dehydration is dried in powder.Thus obtained tail gas is after the purification of pulse bag type dust collector 14, and a part is as gasifying agent circulation profit
With a part of then emptied through centrifugal type draught fan 13；The dried elevated machine 11 of material (miberal powder) and sealed screw feeder
Machine 9 is sent into venturi type preheater 8.
The invention provides a kind of folded formula recirculating fluidized bed gasification-magnetic roasting process and device, make two it is relatively only
Vertical ciculation fluidized gasification furnace and ciculation fluidized magnetization roasting furnace, which are folded, to be linked togather, and is roasted wherein carrying out gasification reaction respectively with reduction
Burn so that the different phase of roasting separates to operate.The optimization of gasification-magnetic roasting process is realized, to realize that coal is complete
Utilize；Recovery magnetization is used as gasifying agent with dried tail gas, realizes the recycling of carbon, emission reduction and the purpose saved；Reduce
The running resistance of fluosolids roasting system, it is homogenized the quality and magnetization efficiency of product.Magnetic roasting process and device, to realize that coal is complete
Complete utilization.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (6)
1. a kind of folded formula recirculating fluidized bed gasification-magnetizing roasting device, it is characterised in that it is by by recycled offgas and air one
Rise the cfentrifugal blower for being sent into gasification furnace, feeder, gasification body of heater and high temperature cyclone separator and loopback of material valve group into
Ciculation fluidized gasification furnace, fluosolids roasting body of heater and high temperature cyclone separator and loopback of material valve group into ciculation fluidized magnetizing roast
Stove, venturi type preheater, lower exhaust high-temperature separator, raw material cabin, swinging residual heat drying machine, pulse bag type dust collector,
Centrifugal type draught fan forms, and the circle fluidized-bed gasification furnace is superimposed with ciculation fluidized magnetization roasting furnace or arranged in series, described
Lower exhaust high-temperature separator side sets raw material cabin, and the raw material cabin connects swinging residual heat drying machine, more than the swinging
Hot dryer connects pulse bag type dust collector, and centrifugal type draught fan is set above the pulse bag type dust collector.
A kind of 2. folded formula recirculating fluidized bed gasification-magnetizing roasting device according to claim 1, it is characterised in that institute
State circle fluidized-bed gasification furnace bottom described in cfentrifugal blower face, the circle fluidized-bed gasification furnace sidepiece and stream thereon
Change roasting body of heater connection, the fluosolids roasting body of heater side connects high temperature cyclone separator, and opposite side sets the lower exhaust
High-temperature separator, the high temperature cyclone separator top set the venturi type preheater, and the venturi type preheater connects
Connect sealed screw(-type) feeder.
A kind of 3. folded formula recirculating fluidized bed gasification-magnetizing roasting device according to claim 1, it is characterised in that institute
Fluosolids roasting body of heater is stated in back taper without cloth harden structure, several swirl diffusers are set in the middle part of body of heater.
4. a kind of folded formula recirculating fluidized bed gasification-magnetic roasting process, it is characterised in that as described below：
(1) after magnetizing roast by preheating, dried partial tail gas CO2, H2O and air together as gasifying agent, via from
Core type air blower is sent into ciculation fluidized gasification furnace, and the coal dust being sent into feeder gasifies in ciculation fluidized gasification furnace；
(2) coal dust is fed again into gasification furnace after high temperature cyclone separator separates through loopback of material valve, is achieved circulation, gas
Gas caused by change is entered by fluosolids roasting body of heater bottom of the back taper in circulating fluidized bed roasting furnace without air distribution plate；
(3) to being sent into the miberal powder in stove after collecting via Venturi preheater preheating and inferior discharge, fluidize also
Original roasting；Miberal powder is realized by high-temperature separator and loopback of material valve to be circulated in fluo solid roaster；Being obtained after roasting can magnetic separation
Iron ore concentrate, while heat smoke caused by being calcined is carried out after miberal powder separates with flue gas through lower exhaust high-temperature separator, and flue gas enters
Enter in swinging residual heat drying machine and original ore powder is dried dehydration, thus obtained tail gas purifies through pulse bag type dust collector
Afterwards, a part recycles as gasifying agent, a part of then emptied through centrifugal type draught fan.
A kind of 5. folded formula recirculating fluidized bed gasification-magnetic roasting process according to claim 4, it is characterised in that institute
Stating ciculation fluidized gasification furnace, operation temperature is 900-1100 DEG C in stove at ambient pressure；Ciculation fluidized magnetization roasting furnace operation temperature
At 700-900 DEG C, material mean residence time in stove reaches 30-60min；Emission dust content is less than 50mg/m3, row
Put 90-100 DEG C of the temperature of tail gas.
A kind of 6. folded formula recirculating fluidized bed gasification-magnetic roasting process according to claim 4, it is characterised in that institute
It is that fine coal is gasified together as gasifying agent using tail gas CO2, H2O and air for being recycled back to state ciculation fluidized gasification furnace
's.
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| CN107058723B (en) * | 2016-07-12 | 2018-04-10 | 合肥德博生物能源科技有限公司 | One kind is used for carbonaceous material circulation calciner and its method of roasting |
| CN108504853A (en) * | 2017-02-27 | 2018-09-07 | 湖北凤山矿业有限公司 | A kind of Coal Gasification and iron ore magnetic roasting process integration and its device |
| CN108239700B (en) * | 2018-03-07 | 2023-11-28 | 长沙矿冶研究院有限责任公司 | Coal-based fluidization reduction roasting system and roasting method thereof |
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| US2670946A (en) * | 1950-10-31 | 1954-03-02 | Pickands Mather & Co | Apparatus for magnetic roasting |
| FR1335112A (en) * | 1962-07-05 | 1963-08-16 | Siderurgie Fse Inst Rech | Method and device for fluidization roasting, more particularly magnetizing roasting |
| CN1632436A (en) * | 2005-01-18 | 2005-06-29 | 中国科学院过程工程研究所 | Fast fluidized calcining process |
| CN1776421A (en) * | 2005-12-01 | 2006-05-24 | 武汉理工大学 | Device for measuring reaction rateof flash magnetized calcination for refractory iron oxide ore |
| CN101191149B (en) * | 2006-11-22 | 2010-05-12 | 中国科学院过程工程研究所 | Coal gasification-pore iron ore magnetic roasting coupling technique and device |
| CN100577775C (en) * | 2007-05-31 | 2010-01-06 | 宋建元 | Coal gasification device of circulating fluidized bed and method for generating coal gas by using coal gasification device |
| CN101130697B (en) * | 2007-09-26 | 2010-08-11 | 东南大学 | Serial fluid bed biomass gasifying device embedded with isolater and method thereof |
| CN201276531Y (en) * | 2008-09-24 | 2009-07-22 | 北京蓝天利源科技有限公司 | Boiler side-arranged gas producer plant for large and middle sized circulating fluid bed boiler |
| CN103031432B (en) * | 2011-09-30 | 2014-09-24 | 中国科学院过程工程研究所 | System for fluidized oxidizing/reducing roasting modification of titaniferous iron concentrate and roasting process |
| CN102628097B (en) * | 2012-04-28 | 2014-06-18 | 北京科技大学 | Method for preparing iron concentrate powder by reducing and magnetizing red mud in fluidized bed |
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