CN107759115A - The new process for calcining and device of a kind of powdered lime - Google Patents
The new process for calcining and device of a kind of powdered lime Download PDFInfo
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- CN107759115A CN107759115A CN201711316959.6A CN201711316959A CN107759115A CN 107759115 A CN107759115 A CN 107759115A CN 201711316959 A CN201711316959 A CN 201711316959A CN 107759115 A CN107759115 A CN 107759115A
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- heat exchange
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- kiln
- cyclone separator
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 85
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 85
- 239000004571 lime Substances 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001354 calcination Methods 0.000 title claims abstract description 10
- 238000005261 decarburization Methods 0.000 claims abstract description 60
- 239000000725 suspension Substances 0.000 claims abstract description 53
- 239000000843 powder Substances 0.000 claims abstract description 52
- 238000001816 cooling Methods 0.000 claims abstract description 44
- 239000004575 stone Substances 0.000 claims abstract description 33
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 27
- 235000019738 Limestone Nutrition 0.000 claims abstract description 21
- 239000006028 limestone Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000000446 fuel Substances 0.000 claims abstract description 10
- 238000010298 pulverizing process Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims abstract description 8
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 24
- 239000000428 dust Substances 0.000 claims description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 15
- 238000007599 discharging Methods 0.000 claims description 11
- 241000196324 Embryophyta Species 0.000 claims description 9
- 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
- 239000007789 gas Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 238000010304 firing Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 3
- 239000005997 Calcium carbide Substances 0.000 claims description 2
- 241000533901 Narcissus papyraceus Species 0.000 claims description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 2
- HIVLDXAAFGCOFU-UHFFFAOYSA-N ammonium hydrosulfide Chemical compound [NH4+].[SH-] HIVLDXAAFGCOFU-UHFFFAOYSA-N 0.000 claims description 2
- 238000005262 decarbonization Methods 0.000 claims description 2
- 239000003337 fertilizer Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 239000010802 sludge Substances 0.000 claims description 2
- 238000003860 storage Methods 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 239000010440 gypsum Substances 0.000 claims 1
- 229910052602 gypsum Inorganic materials 0.000 claims 1
- 239000011574 phosphorus Substances 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 2
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 description 58
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000004568 cement Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 238000009923 sugaring Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Furnace Details (AREA)
Abstract
A kind of new process for calcining of powdered lime, powder is made in limestone mine stone matter deslagging first, suspension preheating device will be delivered to after powder metering again, it is preheated to critical decomposition temperature, it is then introduced into decomposer to be decomposed, then imports depth decarburization device and complete decarburization, generates high temperature powdered lime, the high temperature powdered lime for going out depth decarburization device is discharged into cooling device cooling, that is, obtains powdery active lime.The present invention is also that this method provide the device by being formed including fuel pulverizing plant, powder storehouse, metering device, suspension preheating device, decomposer, depth decarburization device, cooling device, warehouse for finished product, system fan etc..The present invention is realized using limestone mine stone matter deslagging or the calcareous waste residue of industry as raw material, directly burn till powdered lime, it improves mine resources utilization rate, raw burn phenomenon is not present in the lime that the sintering process thermal efficiency of lime is high, energy consumption is low, burns till, and the activity index of lime can also be adjusted according to the requirement of user.
Description
Technical field
The present invention relates to the new powdered lime calcining method and apparatus of a kind of low energy consumption, low emission, for producing high work
Property powdery active lime, belong to industrialization powdered lime manufacturing field.One kind is related in particular to limestone mine stone matter
Deslagging or the calcareous waste residue of industry are raw material, and the method and apparatus of high activity powdered lime is produced using industrialized mode.
Background technology
At present, in lime manufacturing industry, the processing of limestone mine stone matter deslagging is the heavy burden of enterprise all the time, current
Processing mode one is used as the raw material of cement factory, second, for paving the way, third, desulfurizing agent for manufacturing environmental protection industry (epi) etc..By
It is higher in the mine grade of ore for manufacturing lime, so first two processing mode is a kind of waste of resource, at latter
Because dosage is smaller, disposal ability is restricted reason mode, and these not only reduce the economic benefit of enterprise, also seriously constrain
The raising of mine resources utilization rate, enterprise must also land acquisition be used to deposit the stone matter deslagging that pile up like a mountain.
Limestone mine stone matter deslagging is caused small particle or powder ore during mining, the general ＜ of particle diameter
10mm, or even ＜ 1mm.Its CaCO3It is generally higher, it is the quality raw materials for producing powdery active lime.But lime is produced at present
Technology and equipment can only produce block lime, when needing powdered lime, typically fire block lime first, then break again
Broken powder processed obtains.Powdered lime is directly manufactured using ore and is still in the exploratory stage, existing direct method manufacture powdered lime
Method is mainly：
（1）Fluidized bed calcination technology it be by the graininess in fluidized state or powder stone flour applying heat, calcine
Technology and device, existing subject matter be EGT height, the thermal efficiency is low, high energy consumption, and finished product lime raw burn or mistake
Burn serious.
（2）It is first by ore powder to suspension firing technology, is then introduced into suspension preheating predecomposition furnace and burns till stone
Ash.It is domestic once to introduce the device from external, but do not succeed, subject matter is that system operation is unstable, the lime raw burn burnt till
Seriously, Product Activity is not high.Patent No. ZL 201610854065.1 is raw material using oil shale ground slag, using cement industry
Suspension lime kiln lime calcining, domestic Ye Youshuojia enterprises have built suspension calcine production line by raw material of lime stone,
Same problems all be present.
The content of the invention
Present invention aims at solving the problems, such as that above-mentioned various methods are present, to provide one kind in the industry with limestone mine stone
Matter deslagging or the calcareous waste residue of industry are raw material, the novel lime process for calcining of direct calcine and the device for realizing this method,
It improves mine resources utilization rate, and the sintering process thermal efficiency of lime is high, energy consumption is low, the lime that burns till shows in the absence of raw burn
As, can also according to the requirement of user adjust lime activity index.
The technical solution adopted by the present invention is：A kind of new burning apparatus of powdered lime, include the powder processed of order connection
Device, powder storehouse, metering device, suspension preheating device, decomposer, depth decarburization device, cooling device.
Described fuel pulverizing plant is used to stone matter deslagging powder material is made；Described powder storehouse is used to store powder thing
Material；Described metering device is used to measure the inventory into lime firing system；Described suspension preheating device is used to preheat
Powder material is to critical decomposition temperature；Described decomposer is used to make the CaCO in critical decomposition temperature3Be decomposed into CaO and
CO2；Described depth decarburization device is used to make not decompose CaCO completely3In CO2Effusion completely, and by adjusting the CO of material2
Time of liberation and speed, the life burning rate of lime is controlled, meets Active pharmaceutical of the different industries to lime；Described cooling device
For cooling down out the powdered lime of depth decarburization device.
Described suspension preheating device is made up of some grades of heat exchange units, per one-level heat exchange unit by heat exchanger channels and whirlwind
Separator forms, and arranged in series, uppermost heat exchange unit be the first order to multi-stage heat exchanger unit from bottom to top, is the downwards successively
Two level, final stage, the series of heat exchange unit requires to drink according to the control to first order heat exchange unit outlet exhaust temperature
Feelings determine, are formed under normal circumstances by three to level Four；Described decomposer is made up of resolving cell and cyclone separator；Institute
The depth decarburization device stated is made up of depth decarburization kiln, kiln head cover and kiln hood；The cooling device by fluidized suspension cooler,
Cooling blower, cyclone dust collectors, air-introduced machine etc. form.
Fuel pulverizing plant is connected by conveying equipment with powder storehouse, and powder material silo bottom is provided with powder meter, powder meter
It is connected by conveying equipment with the heat exchanger channels charging aperture of the first order heat exchange unit of suspension preheating device；Suspension preheating device
The air-flows of heat exchange units at different levels be all connected in series by heat exchanger channels with stream, next stage heat exchange unit whirlwind point
Air outlet from device is connected with the heat exchanger channels of upper level heat exchange unit, the discharging opening of upper level heat exchange unit cyclone separator with
The heat exchanger channels charging aperture of next stage heat exchange unit is connected, the like；The air-out of first order heat exchange unit cyclone separator
Mouth is connected with system fan air inlet；The air outlet phase of the heat exchanger channels of final stage heat exchange unit and decomposer cyclone separator
Connection, the discharging opening of the heat exchange unit cyclone separator are connected with resolving cell charging aperture；In decomposer, resolving cell goes out
Air port is connected with cyclone separator, and resolving cell bottom air inlet is connected with kiln hood air outlet, cyclone separator discharging
Mouth is connected with kiln hood charging aperture；Depth decarburization kiln kiln hood position sets kiln head cover, and kiln tail position sets kiln hood；Kiln head cover discharges
Mouth is connected with fluidized suspension cooling machine inlet.
Fluidized suspension cooler air inlet is connected with cooling blower, fluidized suspension cooler air outlet and cyclone dust collectors
Air inlet is connected, and the air outlet of cyclone dust collectors is connected with fan inlet, and fan out draft is distinguished by pipeline
It is connected with kiln hood burner, decomposition combustion device；The powdered lime to cool down is conveyed by conveying equipment and is stored in finished product
Storehouse.
Described depth decarburization device kiln head cover sets kiln hood burner, and resolving cell bottom appropriate location, which is set, decomposes combustion
Burner.
The present invention operation principle be:Powder is made in limestone mine stone matter deslagging first, then will be defeated after powder metering
Suspension preheating device is delivered to, is preheated to critical decomposition temperature, decomposer is then introduced into and is decomposed, then imports depth and takes off
Carbon device completes decarburization, generates high temperature powdered lime, and the high temperature powdered lime for going out depth decarburization device is discharged into cooling device cooling,
Obtain powdery active lime.
Specifically：Powder is made in limestone mine stone matter deslagging first, then by powder conveying and is stored in powder
Storehouse, then be transported to after measuring equipment is measured at the charging aperture of first order heat exchange unit heat exchanger channels of suspension preheating device, with
The air-flow of air outlet from second level heat exchange unit cyclone separator enters the through first order heat exchange unit heat exchanger channels together
One-level heat exchange unit cyclone separator；Go out the material of first order heat exchange unit cyclone separator with being revolved from third level heat exchange unit
The air outlet air-flow of wind separator together enters second level heat exchange unit cyclone separator through second level heat exchange unit heat exchanger channels；
By that analogy；The high-temperature material for going out final stage heat exchange unit cyclone separator enters resolving cell；In resolving cell, the overwhelming majority
CaCO3It is decomposed into CaO and CO2, only a few stone matter deslagging particle kernel CaCO3In CO2Not effusion completely, goes out resolving cell thing
Expect the cyclone separator for entering decomposer together with high-temperature flue gas, after cyclone separator separates, air-flow enters suspension preheating
The heat exchanger channels of device final stage heat exchange unit, material enter depth decarburization kiln by kiln hood, make the CaCO not decomposed completely3After
Continuous to decompose to that decarburization is complete, described decarburization refers in CaCO3CO in decomposition reaction2The process escaped completely；After depth decarburization
High-temperature lime fluidized suspension cooler is discharged into by kiln head cover, lime is cooled down by cooling air, cooling air cooling stone
It is heated while grey, then after cyclone dust collectors gather dust processing, introduces kiln hood burner, decomposition combustion device respectively by air-introduced machine
As combustion air；Active lime after cooling removes cyclone dust collectors together with cooling air, the active lime isolated by
Conveying equipment is delivered to warehouse for finished product storage.
Thermal-flame forms the temperature field of lime decarburization into depth decarburization kiln as caused by kiln hood burner combustion, and is
Depth decarburization provides heat；Thermal-flame caused by the burning of decomposition combustion device enters the temperature that resolving cell forms decomposition of limestone
, and be CaCO3Decompose and heat is provided.
In the presence of system fan, the high temperature gas flow for going out depth decarburization kiln initially enters resolving cell, with resolving cell
Interior high-temperature flue gas converges, and then passes sequentially through cyclone separator, the heat exchange units at different levels of suspension preheating device of decomposer,
By first order heat exchange unit discharge system.
The present invention fires powdered lime for limestone mine stone matter deslagging and provides a kind of new technology and device, particularly
Depth decarburization kiln is by adjusting the CO of material2Time of liberation and speed, realize that (emphasis is raw burning to the activity index of lime
Rate) control, have the characteristics that：
1st, limestone mine stone matter deslagging recycling, both solved the pollution problem of mine stone matter deslagging, and protected environment,
Utilized again for stone matter deslagging and open new approach, while also save the problem of stone matter deslagging land acquisition is is deposited by enterprise,
Each of which increases the economic benefit of bargh.
2nd, superior product quality, activity are high.Compared to more existing powdered lime firing technology, raw burn rate is low, lime quality better.
3rd, energy consumption is low.Compare and similar lime production line, the heat consumption of unit product of the present invention about reduces by 20% or so.
4th, lime is applied widely, can be required according to different industries with ash, meets the requirement of all types of user enterprise.
Powdery active lime is made using limestone mine stone matter deslagging as raw material in the present invention, realizes the money of stone matter deslagging
Sourceization utilizes.The present disclosure additionally applies for by the use of all types of industries waste residue as raw material, high activity powdered lime, such as sugaring filter are prepared
The industrial residue such as mud, paper white sludge, carbide slag caused by calcium carbide acetylene gas, calcium carbonate slag caused by ardealite sulphur ammonium fertilizer.
Brief description of the drawings
Fig. 1 schematic diagrames of the present invention；
In Fig. 1：Fuel pulverizing plant 1, powder storehouse 2, metering device 3, suspension preheating device 4, heat exchange unit cyclone separator 4.1, change
Hot cell heat exchanger channels 4.2, decomposer 5, decomposer resolving cell 5.1, decomposer cyclone separator 5.3, decomposition combustion
Burner 6, depth decarburization device 7, kiln hood 7.1, depth decarburization kiln 7.2, kiln head cover 7.3, kiln hood burner 8, fluid bed cooling
Device 9, fluidized suspension cooler 9.1, cooling blower 9.2, cyclone dust collectors 9.3, air-introduced machine 9.4, warehouse for finished product 10, system fan
11。
Fig. 2 schematic flow sheets of the present invention.
Embodiment
In conjunction with the level Four suspension preheating device shown in accompanying drawing 1, the present invention is described as follows.
The present invention is that direct calcine provides a kind of using limestone mine stone matter waste residue or the calcareous waste residue of industry as raw material
New lime process for calcining and device.
A kind of new powdered lime suspension calcining device, it is characterised in that：Fuel pulverizing plant 1, powder including order connection
Storehouse 2, metering device 3, suspension preheating device 4, decomposer 5, depth decarburization device 7, cooling device 9, warehouse for finished product 10, system wind
Machine 11 etc..
Described fuel pulverizing plant 1 is used to stone matter deslagging powder is made；Described powder storehouse 2 is used to store powder material；
Described metering device 3, which is used to measure, enters firing system inventory；Described suspension preheating device 4 is used for pre-heating powder material
To critical decomposition temperature；Described decomposer 5 is used to make the CaCO in critical decomposition temperature3It is decomposed into CaO and CO2；It is described
Depth decarburization device 7 be used for make not decompose CaCO completely3In CO2Effusion completely, by the CO for adjusting material2Time of liberation
And speed, meet Active pharmaceutical of the different industries to lime；Described cooling device 9 is used to cool down by the row of depth decarburization device 7
The powdered lime gone out.
Described suspension preheating device 4 is made up of some grades of heat exchange units, per one-level heat exchange unit by heat exchanger channels and rotation
Wind separator forms, and arranged in series, uppermost heat exchange unit are the first order to multi-stage heat exchanger unit from bottom to top, are downwards successively
The second level, final stage, the series of heat exchange unit is according to the control requirement to first order heat exchange unit outlet exhaust temperature
Determine, formed under normal circumstances by three to level Four as one sees fit；Described decomposer 5 is by resolving cell 5.1 and cyclone separator 5.2
Composition；Described depth decarburization device 7 is made up of depth decarburization kiln 7.1, kiln head cover 7.2 and kiln hood 7.3；The cooling device
9 are made up of fluidized suspension cooler 9.1, cooling blower 9.2, cyclone dust collectors 9.3, air-introduced machine 9.4 etc..
Fuel pulverizing plant 1 is connected by conveying equipment with powder storehouse 2, and the bottom storehouse of powder storehouse 2 is provided with powder meter 3, powder meter
Measuring device 3 is connected by conveying equipment with the charging aperture of heat exchanger channels 4.2 of the first order heat exchange unit of suspension preheating device 4；It is outstanding
The air-flow of the heat exchange units at different levels of floating preheating device 4 is all connected by heat exchanger channels in series with stream, and next stage changes
The air outlet of hot cell cyclone separator is connected with the heat exchanger channels of upper level heat exchange unit, upper level heat exchange unit cyclonic separation
The discharging opening of device is connected with the heat exchanger channels charging aperture of next stage heat exchange unit, the like；First order heat exchange unit whirlwind
The air outlet of separator 4.2 is connected with the air inlet of system fan 11；The heat exchanger channels of final stage heat exchange unit revolve with decomposer 5
The air outlet of wind separator 5.2 is connected, and the discharging opening of the heat exchange unit cyclone separator is connected with the charging aperture of resolving cell 5.1
Connect；In decomposer 5, the air outlet of resolving cell 5.1 is connected with cyclone separator 5.2, the bottom air inlet of resolving cell 5.1 with
The air outlet of kiln hood 7.1 is connected, and the discharging opening of cyclone separator 5.2 is connected with the charging aperture of kiln hood 7.1；Depth decarburization kiln
7.2 kiln hood positions set kiln head cover 7.3, and kiln tail position sets kiln hood 7.1；The discharging opening of kiln head cover 7.3 and fluidized suspension cooler 9.1
Charging aperture is connected.
The air inlet of fluidized suspension cooler 9.1 is connected with cooling blower 9.2, the air outlet of fluidized suspension cooler 9.1 with
The air inlet of cyclone dust collectors 9.3 is connected, and the air outlet of cyclone dust collectors 9.3 is connected with the air inlet of air-introduced machine 9.4, air-introduced machine
9.4 air outlets are connected with kiln hood burner 8, decomposition combustion device 6 respectively by pipeline；The powdered lime to cool down passes through defeated
Send equipment to convey and be stored in warehouse for finished product 10.
Described depth decarburization device kiln head cover 7.3 sets kiln hood burner 8, and the bottom appropriate location of resolving cell 5.1 is set
Put decomposition combustion device 6.
The present invention operation principle be:Powder is made in limestone mine stone matter deslagging first, then will be defeated after powder metering
Suspension preheating device 4 is delivered to, is preheated to critical decomposition temperature, decomposer 5 is then introduced into and is decomposed, then import depth
Decarbonization device 7 completes decarburization, generates high temperature powdered lime, and the high temperature powdered lime for going out depth decarburization device 7 is discharged into cooling device 9
Cooling, that is, obtain powdery active lime.
Specifically：It is powder that limestone mine stone matter deslagging, which is crushed, first, gained powder granularity ＜ 3mm, then will
Powder conveying is simultaneously stored in powder storehouse 2, then the first order heat exchange list of suspension preheating device 4 is transported to after the metering of measuring equipment 3
At the charging aperture of first heat exchanger channels 4.2, passed through together with the air-flow of the air outlet from second level heat exchange unit cyclone separator 4.1
First order heat exchange unit heat exchanger channels 4.2 enter first order heat exchange unit cyclone separator 4.1；Go out first order heat exchange unit whirlwind
The material of separator 4.1 is with the air outlet air-flow from third level heat exchange unit cyclone separator together through second level heat exchange unit
Heat exchanger channels enter second level heat exchange unit cyclone separator；By that analogy；Go out the high temperature of final stage heat exchange unit cyclone separator
Material enters resolving cell 5.1；In resolving cell 5.1, most CaCO3It is decomposed into CaO and CO2, only a few stone matter deslagging
Particle kernel CaCO3In CO2Not effusion completely, go out the whirlwind that resolving cell material enters decomposer 5 together with high-temperature flue gas
Separator 5.2, after cyclone separator separation 5.2, air-flow enters the heat exchanger channels of the final stage heat exchange unit of suspension preheating device 4,
Material enters depth decarburization kiln 7.2 by kiln hood 7.1, makes the CaCO not decomposed completely3It is complete to continue to decompose to decarburization, it is described
Decarburization refer in CaCO3CO in decomposition reaction2The process escaped completely；High-temperature lime after depth decarburization is by kiln head cover 7.3
Fluidized suspension cooler 9.1 is discharged into, is cooled down lime by cooling air, cooling air is heated while cool lime,
Again after cyclone dust collectors 9.3 gather dust processing, kiln hood burner 8 is introduced respectively by air-introduced machine 9.4, decomposition combustion device 6 is used as and helped
Fire air；Active lime after cooling is entered cyclone dust collectors 9.3 together with cooling air, and the active lime isolated is by defeated
Send equipment to be delivered to warehouse for finished product 10 to store.
By kiln hood burner 8 burn caused by thermal-flame enter depth decarburization kiln 7.2 and form the temperature field of lime decarburization,
And provide heat for depth decarburization；Decomposition combustion device 6 burn caused by thermal-flame enter resolving cell 5.1 and form lime stone point
The temperature field of solution, and be CaCO3Decompose and heat is provided.
In the presence of system fan 11, the high temperature gas flow for going out depth decarburization kiln 7.2 initially enters resolving cell 5.1, with
High-temperature flue gas in resolving cell 5.1 converges, and then passes sequentially through cyclone separator 5.2, the suspension preheating device of decomposer 5
4 heat exchange units at different levels, by first order heat exchange unit discharge system.
Claims (4)
- A kind of 1. new process for calcining of powdered lime, it is characterised in that：Powder is made in limestone mine stone matter deslagging first, Suspension preheating device will be delivered to after powder metering again, be preheated to critical decomposition temperature, be then introduced into decomposer progress Decompose, then import depth decarburization device and complete decarburization, generate high temperature powdered lime, go out the high temperature powdered lime of depth decarburization device Cooling device cooling is discharged into, that is, obtains powdery active lime；Described suspension preheating device is made up of some grades of heat exchange units, per one-level heat exchange unit by heat exchanger channels and cyclonic separation Device forms, and arranged in series, uppermost heat exchange unit are the first order to multi-stage heat exchanger unit from bottom to top, is second downwards successively Level, final stage, the series of heat exchange unit is taken the circumstances into consideration according to the control requirement to first order heat exchange unit outlet exhaust temperature It is determined that formed under normal circumstances by three to level Four；Described decomposer is made up of resolving cell and cyclone separator；It is described Depth decarburization device be made up of depth decarburization kiln, kiln head cover and kiln hood；The cooling device is by fluidized suspension cooler, cold But blower fan, cyclone dust collectors, air-introduced machine etc. form；Powder is made in limestone mine stone matter deslagging first, then by powder conveying and is stored in powder storehouse, then is set through metering It is transported to after standby metering at the charging aperture of first order heat exchange unit heat exchanger channels of suspension preheating device, with being exchanged heat from the second level The air-flow of the air outlet of unit cyclone separator revolves through first order heat exchange unit heat exchanger channels into first order heat exchange unit together Wind separator；Go out the material of first order heat exchange unit cyclone separator and the air-out from third level heat exchange unit cyclone separator Implication stream together enters second level heat exchange unit cyclone separator through second level heat exchange unit heat exchanger channels；By that analogy；Go out end The high-temperature material of level heat exchange unit cyclone separator enters resolving cell；In resolving cell, most CaCO3It is decomposed into CaO and CO2, only a few stone matter deslagging particle kernel CaCO3In CO2Not effusion completely, goes out resolving cell material and high-temperature flue gas Enter the cyclone separator of decomposer together, after cyclone separator separates, air-flow exchanges heat into suspension preheating device final stage The heat exchanger channels of unit, material enter depth decarburization kiln by kiln hood, make the CaCO not decomposed completely3Continue to decompose to decarburization Completely, described decarburization refers in CaCO3CO in decomposition reaction2The process escaped completely；High-temperature lime after depth decarburization by Kiln head cover is discharged into fluidized suspension cooler, is cooled down lime by cooling air, cooling air is added while cool lime Heat, then after cyclone dust collectors gather dust processing, kiln hood burner, decomposition combustion device are introduced respectively by air-introduced machine as combustion-supporting sky Gas；Active lime after cooling is entered cyclone dust collectors together with cooling air, and the active lime isolated is by conveying equipment It is delivered to warehouse for finished product storage;Thermal-flame forms the temperature field of lime decarburization into depth decarburization kiln as caused by kiln hood burner combustion, and is depth Decarburization provides heat；Thermal-flame caused by the burning of decomposition combustion device enters the temperature field that resolving cell forms decomposition of limestone, And it is CaCO3Decompose and heat is provided;In the presence of system fan, the high temperature gas flow for going out depth decarburization kiln initially enters resolving cell, in resolving cell High-temperature flue gas converges, and then passes sequentially through cyclone separator, the heat exchange units at different levels of suspension preheating device of decomposer, by One-level heat exchange unit discharge system.
- A kind of 2. burning apparatus of powdered lime, it is characterised in that：Fuel pulverizing plant, powder storehouse including order connection, metering dress Put, suspension preheating device, decomposer, depth decarburization device, cooling device；Described fuel pulverizing plant is used to stone matter deslagging powder is made；Described powder storehouse is used to store powder material；Described Metering device, which is used to measure, enters lime firing system inventory；Described suspension preheating device is used for pre-heating powder material to facing Boundary's decomposition temperature；Described decomposer is used to make the CaCO in critical decomposition temperature3It is decomposed into CaO and CO2；Described depth Degree decarbonization device is used to make not decompose CaCO completely3In CO2Effusion completely, by the CO for adjusting material2Time of liberation and speed Degree, meets Active pharmaceutical of the different industries to lime；Described cooling device is used for the powdery stone for cooling down out depth decarburization device Ash.
- 3. the new powdered lime burning apparatus according to claims 1, it is characterised in that：Described suspension preheating device It is made up of some grades of heat exchange units, is made up of per one-level heat exchange unit heat exchanger channels and cyclone separator, multi-stage heat exchanger unit is certainly Lower and upper arranged in series, uppermost heat exchange unit is the first order, is downwards successively the second level, final stage, heat exchange list The series of member takes the circumstances into consideration to determine according to the control requirement to first order heat exchange unit outlet exhaust temperature, under normal circumstances by three to four Level composition；Described decomposer is made up of resolving cell and cyclone separator；Described depth decarburization device is by depth decarburization Kiln, kiln head cover and kiln hood composition；The cooling device is by fluidized suspension cooler, cooling blower, cyclone dust collectors, air-introduced machine Deng composition；Fuel pulverizing plant is connected by conveying equipment with powder storehouse, and powder material silo bottom is provided with powder meter, and powder meter passes through Conveying equipment is connected with the heat exchanger channels charging aperture of the first order heat exchange unit of suspension preheating device；Suspension preheating device it is each The air-flow of level heat exchange unit is all connected by heat exchanger channels in series with stream, next stage heat exchange unit cyclone separator Air outlet be connected with the heat exchanger channels of upper level heat exchange unit, the discharging opening of upper level heat exchange unit cyclone separator with it is next The heat exchanger channels charging aperture of level heat exchange unit is connected, the like；The air outlet of first order heat exchange unit cyclone separator with System fan air inlet is connected；The heat exchanger channels of final stage heat exchange unit are connected with the air outlet of decomposer cyclone separator Connect, the discharging opening of the heat exchange unit cyclone separator is connected with resolving cell charging aperture；In decomposer, resolving cell air-out Mouth is connected with cyclone separator, and resolving cell bottom air inlet is connected with kiln hood air outlet, cyclone separator discharging opening It is connected with kiln hood charging aperture；Depth decarburization kiln kiln hood position sets kiln head cover, and kiln tail position sets kiln hood；Kiln head cover discharging opening It is connected with fluidized suspension cooling machine inlet；Fluidized suspension cooler air inlet is connected with cooling blower, fluidized suspension cooler air outlet and cyclone dust collectors air intake Mouthful be connected, the air outlet of cyclone dust collectors is connected with fan inlet, fan out draft by pipeline respectively with kiln Head burner, decomposition combustion device are connected；The powdered lime to cool down is conveyed by conveying equipment and is stored in warehouse for finished product；Described depth decarburization device kiln head cover sets kiln hood burner, and resolving cell bottom appropriate location sets decomposition combustion Device.
- 4. powdered lime burning apparatus according to claim 3, it is characterised in that：It is using limestone mine stone matter deslagging Raw material, powdery active lime is directly made, realizes the recycling of stone matter deslagging, the present invention can also give up to all types of industries Slag is raw material, prepares high activity powdered lime, such as carbide slag, phosphorus caused by sugar mill mud, paper white sludge, calcium carbide acetylene gas The calcareous waste residue such as calcium carbonate slag caused by gypsum sulphur ammonium fertilizer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809717A (en) * | 2019-04-04 | 2019-05-28 | 南京凯盛国际工程有限公司 | A kind of powdered lime preparation system |
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