CN207079173U - A kind of full recovery CO2 lime kiln device - Google Patents
A kind of full recovery CO2 lime kiln device Download PDFInfo
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- CN207079173U CN207079173U CN201720397478.1U CN201720397478U CN207079173U CN 207079173 U CN207079173 U CN 207079173U CN 201720397478 U CN201720397478 U CN 201720397478U CN 207079173 U CN207079173 U CN 207079173U
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- 239000004571 lime Substances 0.000 title claims abstract description 62
- 238000011084 recovery Methods 0.000 title claims description 14
- 235000008733 Citrus aurantifolia Nutrition 0.000 title abstract description 50
- 235000011941 Tilia x europaea Nutrition 0.000 title abstract description 50
- 238000001354 calcination Methods 0.000 claims abstract description 60
- 239000000446 fuel Substances 0.000 claims abstract description 20
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 20
- 239000011707 mineral Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims description 82
- 239000000463 material Substances 0.000 claims description 68
- 238000010438 heat treatment Methods 0.000 claims description 43
- 238000002485 combustion reaction Methods 0.000 claims description 37
- 210000000664 rectum Anatomy 0.000 claims description 28
- 239000000428 dust Substances 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 15
- 235000019738 Limestone Nutrition 0.000 claims description 11
- 239000006028 limestone Substances 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 7
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- 238000005338 heat storage Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 238000000151 deposition Methods 0.000 claims description 2
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- 229910002092 carbon dioxide Inorganic materials 0.000 description 46
- 239000000047 product Substances 0.000 description 30
- 238000005516 engineering process Methods 0.000 description 29
- 210000000038 chest Anatomy 0.000 description 20
- 238000000034 method Methods 0.000 description 17
- 235000010755 mineral Nutrition 0.000 description 17
- 239000003546 flue gas Substances 0.000 description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 12
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical group [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 239000002912 waste gas Substances 0.000 description 9
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical group [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 8
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 239000000292 calcium oxide Substances 0.000 description 4
- 235000012255 calcium oxide Nutrition 0.000 description 4
- 239000000112 cooling gas Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- PZZOEXPDTYIBPI-UHFFFAOYSA-N 2-[[2-(4-hydroxyphenyl)ethylamino]methyl]-3,4-dihydro-2H-naphthalen-1-one Chemical compound C1=CC(O)=CC=C1CCNCC1C(=O)C2=CC=CC=C2CC1 PZZOEXPDTYIBPI-UHFFFAOYSA-N 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000004449 solid propellant Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 235000013305 food Nutrition 0.000 description 1
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- 238000001727 in vivo Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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Landscapes
- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The utility model proposes utilize CO2Hot blast is calcined to mineral aggregate, heats CO using recuperative heater2Commercial lime device for making, mainly include the vertical limekiln of inner sleeve, and the recuperative heater group of heat energy is provided for limekiln, producing CO caused by lime2All reclaimed.The CO being recovered2After dedusting, a portion is transported to recuperative heater group, sends back to limekiln after being heated to 800 DEG C ~ 1200 DEG C again and is used for calcining raw materials, another part CO caused by the calcining of limekiln2Then it is recycled.The utility model significantly reduces limekiln calcination time, improves production efficiency, all reclaims CO2Then improve the value of lime kiln system byproduct.The utility model proposes lime kiln system buner system need not be configured in kiln body, thus be also beneficial to realize that stove maximizes；Recuperative heater, which can utilize but be not limited to single blast furnace gas, does fuel, thus advantageously reduces limekiln operating cost.
Description
Technical field
It the utility model is related to a kind of technique for utilizing gas to produce lime for the limekiln of fuel and the utilization limekiln
Method.
Background technology
Lime is calcium oxide（CaO）, it is widely used in the works such as steel and iron industry, calcium carbide industry, aluminum oxide industry, refractory material
One of raw materials for production necessary to industry, and these large-scale industry fields, such as in metallurgical industry, often produce 1 ton of steel
Lime with regard to needing 70 kilograms.The primary raw material for producing lime is lime stone, and lime stone main component is calcium carbonate（CaCO3）,
The general principle of lime calcining is exactly by high temperature, Decomposition of Calcium Carbonate in lime stone into calcium oxide and carbon dioxide.
Fundamental reaction formula：CaCO3+42.5Kcal =CaO+CO2
Lime reparation technology process is broadly divided into preheating, calcines, cools down and unload ash.Based on existing lime preparation technique
Process is：Lime stone and solid fuel are loaded into limekiln, or while lime stone loads limekiln, gas fired
Material is sent into kiln body through pipeline and burner；Lime stone is preheated to 800 DEG C ~ 850 DEG C and starts to decompose, and calcining is completed to 1200 DEG C；
The lime of generation is unloaded outside kiln discharge after supercooling, that is, completes the production of quick lime product.In existing lime production technique,
Often the lime of 1 ton of production will produce the CO more than 1 ton2Discharge.Although CO2In food, health, petrochemical industry, nuclear industry, disappear
There is highly important purposes in all departments of the national economy such as anti-field, be also widely used in metallurgy industry, but existing
In lime production technique, because fuel needs to blast combustion air in burning, CO in flue gas2Volumetric concentration be about 10-
15%, reclaim CO2Cost it is very high, a large amount of CO will typically be contained in enterprise2Flue gas be directly discharged into air, cause environmental pollution.
Existing limekiln is by fuel point：There is multifuel combustion kiln（I.e. to bake based on fluid fuel, including coke, coke powder, coal etc.）
And gas burning kiln（I.e. based on burn gas fuel, such as blast furnace gas, coke-stove gas, coal gas of converter, calcium carbide tail gas, producer coal
Gas, natural gas etc.）, wherein gas burning kiln application is more extensive；By kiln shape point：There are shaft furnace, rotary kiln, sleeve kiln, cocurrent heat accumulating type
MAERZ lime kiln（Maers Kiln, also referred to as mayer hereby kiln）, Fu Kasi kilns（Italy）Deng wherein application is more widely annular sleeve
Cylinder shaft furnace, Maers Kiln；By mode of operation point：There is negative-pressure operation kiln（Such as annulus shaft furnace）With positive pressure operation kiln（Such as cocurrent
Heat accumulating type MAERZ lime kiln）.
No matter the limekiln of any form, be by kiln body, feeding device, distribution device, burner, unload grey dress
Put, the part such as electrical equipment, instrument control device, dust arrester composition.Existing limekiln technology, especially various gas burning kilns share
The characteristics of be to be required for configuring buner system, the buner system of gas burning kiln is typically made up of multiple rows of, multigroup burner distribution,
It is configured with gaseous fuel pipeline and comburent air duct, nozzle etc..
In order to illustrate more clearly of the popular feature of various forms of gas burning kiln technologies, below with using commonplace ring
Shape BASK, cocurrent regenerator kiln（Maers Kiln）Exemplified by be illustrated.
Such as accompanying drawing 1, annulus shaft furnace system includes：1- bodies of heater, 1a- cooling airs, 2- feeding systems, the upper inner sleeves of 3-1-
Inner sleeve, 4- exhaust emission systems, 4a- wholes waste gas, 5- burners, 5a- combustion gas+burner are empty under cylinder, 3-2- heat exchangers, 3-3
Gas, 6- discharge systems；Have in body of heater 1：1-1- preheating zones, 1-2- burning zones, 1-3- cooling zones.
In the 1-1 of preheating zone, lime stone is heated to its calcining heat.Preheating zone 1-1 heat comes from burning zone 1-2
Flue gas, a part of flue gas caused by burning zone 1-2 is upwardly into preheating zone 1-1, then enters from preheating zone 1-1 tops useless
Gas system 4；Another part waste gas（With unnecessary heat）It is combustion-supporting for heating by upper inner sleeve 3-1 into heat exchanger 3-2
Air, the combustion air after heating are sent to burner 5 by pipeline, and the waste gas after heat exchange is discharged through waste gas system 4 again.
Calcination process is carried out in burning zone 1-2, combustion gas and combustion air mixing, burning in burner 5, in burning zone 1-
To limestone calcination in 2, a part of flue gas 4a after calcining is preheated in the 1-1 of preheating zone to mineral aggregate upwards, lime into
Product enter cooling zone 1-3 in burning zone 1-2 bottoms.
In cooling zone 1-3, the cold air 1a of hot lime and kiln bottom suction carries out heat exchange, by going out after temperature reduction
Material system 6 discharges kiln body.Cooling air 1a from cooling zone 1-3 bottoms enter kiln in, in lower inner sleeve 3-3 with burner 5
A part of flue gas is mixed into high temperature off-air, and being discharged into burner 5 from lower inner sleeve 3-3 tops participates in burning.
The major technique advantage of sleeve kiln includes：The thermal efficiency is high, raw material enters that kiln particle size range is big, floor space is small, negative pressure
Calcining, stabilization safe for operation etc..The technical characterstic of this type of furnace, which is additionally included between calcining section and cooling section, has a negative pressure
Operating space and the boundary zone in positive pressure operation area.Wherein, cocurrent flue gas is extracted kiln body in this boundary zone, one of whole flue gas
Divide and heat exchanger is entered by inner sleeve, another part is extracted after being preheated to mineral aggregate from kiln body top, therefore, from described point
Boundary's band negative-pressure operation area formed above.In cooling section, it is extracted from the cooling air of kiln body bottom suction from cooling section top,
Therefore positive pressure operation area is formed in the bottom of the boundary zone.
In said system, the CO of calcining generation in kiln2Discharged through waste gas system 4, due to being wherein mixed with air, therefore
Reclaim CO2Cost is very high；Preheating zone 1-1 and burning zone 1-2 heat are all from gaseous fuel and combustion air in burner 5
The high-temperature flue gas that mixed combustion is formed, all burners are divided to two bands to be arranged in kiln body 1, to original by the way of directly burning
Material is heated, and therefore, heat is unable to equiblibrium mass distribution.In this case, in order to obtain the lime of high-quality, whole calcining is anti-
Longer between seasonable, this had both increased kiln body size, while significantly limit productivity ratio again.
Cocurrent regenerator kiln（Maers Kiln）And at present using one of more extensive kiln type.There are two kinds of forms at present
Lime shaft kiln, i.e., the reverse-flow and more thorax parallel type limekiln of single thorax（Usually double kiln thoraxes）.The cocurrent heat accumulating type limekiln of standard
Double bore type limekilns by burning kiln thorax and the non-combustible mutual switchover operation of firing thorax, its using annular double thoraxes structure shape
Formula, centre are connected by passage, and i.e. rotation is calcined once at regular intervals.Complete calcine after, burning gases from burning kiln thorax
It is interior that non-combustible firing thorax is flowed into by the passage, raw material limestone is preheated, preheating zone serves heat exchanger
Effect.This cocurrent regenerator kiln has the advantages that the thermal efficiency is high, energy consumption is low, lime product quality is higher, but because more
A set of exchange system, equipment is more complicated and invests larger.Similarly, the productivity ratio of cocurrent regenerator kiln technology is not bright
It is aobvious to improve, reclaim CO2Cost is very high.
Cocurrent regenerator kiln（Maers Kiln）Double thorax lime shaft kiln operation principle schematic diagram such as accompanying drawings 2.Including：7- fires
Burning thorax, 7-1- burning wind, 7-2- burning zones, 7-3 cooling zones, 8- exhaust thoraxes, 8-1- preheating zones, 8-2 waste gas, 9- passages, 8-3 are cold
But band, 10- cooling wind.
Burn for formula limekilns, its structure type and forge as described previously for the relatively extensive various forms of gas of application
Burning form is although otherwise varied, but technological process, capital equipment form substantially similar, are all to employ to be arranged on the problem of general character
Burner in kiln body carries out heating and calcining to mineral aggregate, and calcination time is longer, and equipment investment is big, operating cost is high, maintenance cost
Height, productivity ratio is relatively low, CO2Exhaust emission is serious.Although engineers and technicians have carried out many significant improvements, but above-mentioned general character is asked
Topic is not solved still.
The achievement in research in close several limekilns includes with the utility model：
A kind of Beam type heat storage lime kiln（CN 203007146 U）, such as accompanying drawing 3, including：
Suction bar, 8c- cooling zones, 9c- go out under the upper suction bar of 1c- feed systems, 2c-, 3c- preheating zones, 6c- kiln bodies, 7c-
Material mouth, 10c- cyclone dust collectors, 11c- sack cleaners, 12c- air-introduced machines, the valves of 13c- the 2nd, 14c-2 storage heaters, 15c-
Burner, the valves of 16c- the 4th, the valves of 17c- the 1st, 18c- triple valves, 19c-1 storage heaters, the valves of 20c- the 3rd, the combustion-supporting skies of 21c-
Gas, 22c- fuel, 23c- exhaust systems.
The technology is that the hot waste gas extracted out from kiln body cooling section top is carried out into dust separation processing, then as combustion-supporting sky
Gas enters preheater, and combustion-supporting air preheater is made up of 2 heat regenerators, and 2 heat regenerators are in turn to combustion-supporting sky
Gas is heated, and the combustion air of heat is constantly provided for kiln body burner, and kiln body burner is disposed in the burning beam of kiln body
On.Heat regenerator uses low-heat value gas as fuel, and primary structure includes burner and regenerator；Due to having used preheating
Combustion air afterwards, kiln body burner can also use low-heat value gas.This technology is characterized in utilizing heat regenerator
Combustion-supporting gas is preheated, improves combustion air temperature, therefore kiln body burner can use low-heat value gas.But because
This technology solve only the problem of reducing operating cost using low-heat value gas, is not directed to other gas burning formula limekilns and is total to
Property technical problem, therefore application limited to.
It is similar with above-mentioned technology, there is a kind of " air accumulation of heat limekiln（CN 203144298 U）", its technical characterstic
It is that a kind of " heat-accumulating burner " is devised on kiln body burner, combustion air is carried out using this burner with heat-storing material
Preheating, it is therefore an objective to utilize low-heat value gas in burning.Similarly, this technology also burns formula limekiln without reference to other gas
Common technology problem.
A limekiln technology close with the utility model is that " one kind is based on CO2The cocurrent heat accumulating type limekiln of enrichment
Manufacturing technique method "（CN 105000811 A）, such as accompanying drawing 4.
Including：1d- kilns thorax 1,2d- kilns thorax 2,3d- are oxygen-enriched, 4d- CO2Mixed with coal dust, 5d- CO2Conveyed for carrier gas
Coal dust, 6d- CO2Heat exchange, purifier, 7d- CO2Circulating air, 8d- preheating zones, 9d- burning zones, 10d- cooling zones, 11d- are cold
But lime finished product, the CO of 12d- recovery storages after2, 13d- changements.
This technology is mainly characterized by：Using the double kiln thorax forms of cocurrent heat accumulating type, combustion-supporting gas is used as using 95% oxygen
Solid coal dust mixed combustion with spraying into calcining kiln thorax, solid coal dust is with CO2Gas conveys, and the cooling section in kiln thorax bottom, adopts
Use CO2Gas cools down to lime finished product, and the flue gas after calcining is with after the High-temperature cooling gas mixing on cooling section top, passing through
The passage of double kiln thoraxes enters accumulation of heat kiln thorax, and for the preheating to mineral aggregate, by certain time, calcining kiln thorax is with preheating kiln thorax by changing
To device alternate operation.According to the explanation of this technology, concentration may finally be reclaimed up to more than 95% CO2Gas, these CO2Gas
About the 10% of body is used for conveying solid substance fuel, and about 55% is used for cool lime finished product, and about 35% recycles, such as making
Dry ice.
This technology uses solid fuel-coal dust as fuel, although employing the oxygen of concentration 95% as combustion-supporting gas
And excess coefficient 1.1 ~ 1.4, but certain fuel dust still will be mixed in lime finished product, these dust can pollute into
Product, the quality for reducing finished product；In addition, illustrating according to this technology, " CO is used2As cooling gas by temperature be 1000 DEG C ~
1150 DEG C of high temperature CaO is cooled to 80 DEG C ~ 100 DEG C ".Although this technology lists daily output 450 in technology detail file
Ton, 500 tons, 550 tons of three embodiments, but utility model people still uses CO to it2Technical measures as cooling gas
Feasibility exist query.All proved according to the achievement in research of utility model people, and disclosed research data：If using
CO2Gas cooling high-temperature lime finished product, part lime finished product will be with CO2Reaction regenerates calcium carbonate, causes lime finished product
Quality degradation.
As described previously for research similar in above-mentioned and the utility model, or because itself and unresolved various gas burning kilns
Common technology problem, either because it uses solid fuel or because use CO2The problems such as cooling gas so that
These researchs all can not extensive use.
Utility model content
For problems of the prior art, the utility model provides a kind of full recovery CO2Lime kiln device.
The utility model adopts the following technical scheme that：
A kind of full recovery CO2Lime kiln device, including kiln body and heating furnace group, the kiln body include feed mechanism and discharging
Mechanism, the workspace of the kiln body include preheating section, calcining section, cooling section, inner sleeve are provided with kiln body, in kiln from top to bottom
The material channel of material movement is formed between wall and inner sleeve drum outer wall in vivo, the overall width in the material channel section is latus rectum,
Material channel is different in the latus rectum of preheating section, calcining section, cooling section, and mineral aggregate enters kiln body from feed mechanism, along material channel from
Preheating section passes through cooling section to calcining section, finished product along material channel, finally discharges kiln body from discharging mechanism, and the kiln body calcines section
CO is provided with side wall2Hot wind inlet, heating furnace group is by CO2CO is formed after being heated to design temperature2Hot blast is sent to right in kiln body
Mineral aggregate after preheating is calcined, and CO is provided with the top of kiln body2Retracting device, inner sleeve be located at cooling section top be provided with into
Air port, the space that cooling air is entered between kiln body and inner sleeve from the bottom of kiln body, from entering after being cooled down to lime stone finished product
Air port enters in inner sleeve and is extracted kiln body from top.
Material channel has changeover portion between calcining section and cooling section, and changeover portion latus rectum reduces, and forms material sealing.
Latus rectum of the material channel of the kiln body preferably in the middle part of preheating pars infrasegmentalis, calcining section is larger, is calcining pars infrasegmentalis
Latus rectum reduces, larger in the latus rectum of cooling section after changeover portion.
The ratio of maximum diameter of the material channel of the kiln body in the middle part of calcining section and the minimum latus rectum of calcining pars infrasegmentalis
Preferred scope be 2~3.5, the material channel of the kiln body cooling section maximum diameter and the ratio of changeover portion latus rectum it is excellent
It is 2~3.5 to select scope.
Inner sleeve is internally provided with device for reducing dust, and there is dust collecting its underpart, and its top is connected with induced duct, air inducing
Manage for the cooling air of high temperature to be extracted out from kiln body top, the High-temperature cooling air being extracted is used to heat combustion-supporting gas.
Heating furnace group includes recuperative heater, heat accumulating type preheating furnace and wind mixed chamber, in the burning stove week of recuperative heater
In phase, the gaseous fuel of low heat value and the combustion air from wind mixed chamber enter burner combustion, and the heat smoke heating of generation stores
The heat-storing material in hot cell；In the air-supply cycle of recuperative heater, CO2Gas enters from heating furnace regenerator bottom to be heated
Stove, discharge heating furnace from the hot-blast outlet on regenerator top after heat-storing material heats and be sent into kiln body.
The heat-storing material that the High-temperature cooling air being extracted at the top of from kiln body is used for inside heat storage formula preheating furnace, heating
Heat-storing material afterwards reheats combustion air, and heated combustion air is discharged into the wind mixed chamber from heat-storing material top,
The combustion air is adjusted to the temperature of setting by wind mixed chamber, then is passed to the recuperative heater.
The scope of the set temperature value of 2 hot blasts is 800 DEG C~1200 DEG C, preferably 850 DEG C~1150 DEG C.
The technique effect that the utility model has：
1st, the limekiln is constant using fireless, temperature and adjustable CO2Hot blast is calcined to mineral aggregate；Pass through
It is accurately controlled CO2The hot blast wind-warm syndrome of gas improves calcining effect, therefore burn-off phenomenon is not present, and this is advantageous to improve product
Activity；With CO2Gas is calcined as the heat energy of carrier for mineral aggregate, and calcination time has substantially been greatly shortened, has not increased
Can increases substantially production capacity in the case of adding kiln body volume.Utility model people has carried out verification experimental verification to this, it was demonstrated that with CO2
Gas is calcined as the heat energy of carrier for mineral aggregate, not only significantly reduces calcination time, and lime final product quality is high, living
Property it is high.
, eliminate kiln body burner, substantially simplify kiln structure, system is more stable, reliable, is easy to safeguard,
Reduce system maintenance cost；
3rd, CO is on the one hand realized2Emission reduction, on the other hand equivalent to the by-product that high added value is provided for lime kiln system
Product, improve economic benefit of the present utility model；
4th, using the blast furnace gas compared with low heat value as fuel, be continuously limekiln provide heat energy, substantially instead of
Expensive coke-stove gas or other exotic fuels；The utility model eliminates kiln body burner, therefore simplifies kiln
Body structure, compared to present various limekiln technologies, limekiln operating cost is greatly reduced in the utility model.
Brief description of the drawings
The utility model is further illustrated below in conjunction with the accompanying drawings：
Fig. 1 is one of the prior art described in background technology structural representation；
Fig. 2 is two structural representations of the prior art described in background technology；
Fig. 3 is three structural representations of the prior art described in background technology；
Fig. 4 is four structural representations of the prior art described in background technology；
Fig. 5 is the lime kiln device composition figure in the utility model embodiment 1；
Fig. 6 is the limekiln operation principle schematic diagram in the utility model embodiment 1；
Fig. 7 is the recuperative heater operation principle schematic diagram in the utility model embodiment 1.
Embodiment
Explanation and embodiment are further described to the utility model below in conjunction with the accompanying drawings：
Embodiment 1
Fig. 5 shows that what be the utility model is related to can reclaim CO entirely2Lime kiln system composition and fundamental diagram, bag
Include：100- kiln bodies, 20- heating furnace groups, 21- blast furnace gases, 22- combustion airs, 23- combustion fans, 30- feeding devices, 40- go out
Expect mechanism, 50- cooling airs, 60- CO2Recovering mechanism, 70- CO2Hot blast.Wherein, kiln body 100 includes：110- preheating sections,
120- calcines section, 130- cooling sections
As shown in Figure 5, for the gas burning lime kiln technology of existing form of ownership, meaning of the present utility model
First consist in and use CO2Hot blast is calcined as heat energy carrier to mineral aggregate, CO2Hot blast does not have that flame, temperature are constant, its effect
It is to accelerate mineral aggregate cracking, can not only obtains high-grade lime finished product, and calcination time has been greatly shortened；
Wherein, mineral aggregate enters kiln body 100 from feed mechanism 30, by preheating section 110, calcining section 120, cooling section 130, drop
Lime finished product after temperature is discharged from the bottom discharging mechanism 40 of kiln body 100；Wherein, mineral aggregate uses CO2Hot blast is preheated and forged
Burn, the lime finished product after calcining is cooled down using air；
Wherein, the CO of kiln body is entered from calcining section2Hot blast 70 is calcined to the mineral aggregate after preheating, then is cracked and produced with mineral aggregate
Raw CO2Converge, be upwardly into the preheating section 110 on the top of kiln body 100, be extracted after cooling from the top of kiln body 100, enter
CO2 gases recovering mechanism 60, after dust removal process, a part recycles, and another part enters recuperative heater group, quilt
The calcining section 120 of kiln body 100 is returned again to after heating；
Wherein, 20 preferable scheme of heating furnace group is by three recuperative heaters and two heat accumulating type combustion air preheatings
Stove forms, and heating furnace group 20 is fuel using blast furnace gas 21, by the CO from kiln body2Gas is heated to temperature needed for technique,
For the temperature typically in the range of 800 DEG C ~ 1200 DEG C, preferred scope is 850 DEG C ~ 1150 DEG C；
Wherein, the lime finished product after calcining enters cooling section 130, and cooling air 50 enters kiln body from the bottom of kiln body 100
100 cooling section 130, is cooled down to lime finished product, then is extracted from the top of cooling section 130 of kiln body 100, is sent into heating furnace
Group 20, the caused waste heat in cool lime Finished product processThe of cooling air 50, for heating combustion air in heating furnace group 20
22。
Do not have those shown for accompanying drawing 5 and be not related to some auxiliary equipment and equipment of the present utility model, and unexpectedly
What these affiliated facilities of taste and equipment were not necessarily to for realizing the utility model, it is practical new to realize the utility model purpose
Type people suggests as far as possible using ripe these necessary affiliated facilities of technical configuration and equipment.
More clearly to illustrate implementation of the present utility model, utility model people is using accompanying drawing 6, accompanying drawing 7 to limekiln
Further technology explanation is done with the operation principle of recuperative heater group.Accompanying drawing 6 is the limekiln that the case study on implementation is related to
Operation principle schematic diagram, illustrate the limekiln recovery CO2Gas and utilize CO2The side that hot blast is calcined to mineral aggregate
Method；Accompanying drawing 7 is the operation principle schematic diagram for the recuperative heater group that the utility model case study on implementation is related to, and illustrates the storage
Hot type fuel stack uses low calorie fuels heating CO2And the method for the waste-heat combustion air using cooling air.
With reference to the accompanying drawings 5, for the kiln body of lime kiln system, it is to be related to kiln body to realize one of key of the present utility model
Top CO2The isolation technology of gas and kiln body bottom cooling air, and dedusting and the residual-heat utilization technology of cooling air.
Accompanying drawing 6 is that structure is relatively easy, effectively realizes CO2One exemplary embodiments of emission reduction.
Including：100- limekiln bodies, AB- inner sleeves, 110- preheating sections, 120- calcining sections, 130 cooling sections,
30- feeding devices, 40- drawing mechanisms, 50- cooling airs, 60-CO2Retracting device, 70-CO2Hot blast；
With reference to the accompanying drawings 6, the kiln body 100 is provided with inner sleeve AB, is formed between the inwall of kiln body 100 and inner sleeve AB outer walls
The material channel of material movement, the overall width in the material channel section be latus rectum, material channel in preheating section, calcine section, cold
But the latus rectum of section is different, and mineral aggregate enters kiln body 100 by feeding system 30 from top, downward and along kiln body inwall and inner sleeve
Material channel between cylinder AB outer wall, by preheating section 110, calcining section 120, finished product enters cooling section 130 along material channel,
Finally, the lime finished product after cooling is discharged through discharge system 40；
The CO2Three the discharging into wind nozzle and enter kiln body 100 through being arranged in kiln body 100 of hot blast 70, in the calcining section 120
Lower section, by the way of material channel latus rectum is reduced, changeover portion, the transition are formed between calcining section 120 and cooling section 130
Section sets up material " sealing " layer, i.e., so-called " material sealing ", the changeover portion " material sealing " between calcining section and cooling section
Main function be hinder cooling air 50 enter calcining section 120.
To achieve the above object, Typical solutions provided by the utility model are as follows：
The form of the kiln body 100 is circular shaft furnace, but preferred form is a kind of in the bottom of preheating section 110, calcining section 120
The drum kidney-shaped shaft furnace that the internal diameter at middle part is larger, reduces in the calcining lower inner diameter of section 120；The kiln body 100 is internally provided with inner sleeve
Cylinder AB, the inner sleeve AB generally circular cylinder of form, may be designed in special-shaped barrel；The inwall of kiln body 100 and inner sleeve AB
The material channel of material movement is formed between outer wall, the overall width in the material channel section is latus rectum, and material channel is preheating
Section, calcining section, the latus rectum of cooling section are different, and latus rectum of the material channel at the middle part of calcining section 120 is larger, in calcining section 120 bottom
Latus rectum it is smaller；Ratio of the material channel in the maximum diameter and the minimum latus rectum of calcining pars infrasegmentalis at the middle part of calcining section 120
For 1~4, preferred scope is 2.5~3.5；
Because the material channel is smaller positioned at the latus rectum of the changeover portion of the bottom of calcining section 120, material is smaller in latus rectum
Changeover portion translational speed it is very fast, therefore form so-called changeover portion " material sealing "；This structure can not only hinder cooling empty
Gas enters calcining section 120, is also beneficial to lime finished product and improves activity.
The lime finished product after calcining is cooled down using cooling air, Typical solutions provided by the utility model are such as
Under：
The kiln body 100 is internally provided with inner sleeve AB, and inner sleeve AB is internally provided with device for reducing dust, and there is dust its underpart
Collection device, its top are connected with induced duct, and induced duct is used to from the top of kiln body 100 extract the cooling air 50 of high temperature out, interior
Sleeve AB is having an air inlet positioned at the position on the top of cooling section 130, and cooling air 50 is in the bottom of cooling section 130, also
It is that the bottom of kiln body 100 enters material channel, then is located at from inner sleeve AB the air inlet on the top of cooling section 130 and is drawn into inner sleeve
AB；
In cooling section 130, lime finished product moves down along material channel, and cooling air 50 and lime finished product adverse current to
On, lime finished product is cooled down；Material channel is larger with the latus rectum of bottom in the middle part of cooling section, such as a2, the material channel
It is 1 ~ 4 in the minimum latus rectum a of the changeover portion on maximum diameter a2 and the cooling section top of cooling section ratio, preferred scope is 2 ~
3.5；Enter discharging mechanism 40 after the cooling of lime finished product；Under the suction and pumping effect of induced duct, inner sleeve AB is internally formed negative pressure, cold
But air 50 is drawn into inner sleeve AB from the air inlet positioned at the top of cooling section 130, after inner sleeve AB dedustings, then by drawing
Airduct is extracted kiln body 100.
To achieve the above object, can take the other solutions different from above-mentioned typical scenario, but no matter which kind of
Solution, it should all strive for：1）Cooling air, which will not enter, calcines section, and 2）The cooling air of high temperature after preliminary depositing dust again
It is extracted kiln body.
Accompanying drawing 7 is the fundamental diagram of recuperative heater group 20 involved by the utility model.Including：201- accumulation of heats
Formula heating furnace, 202- heat accumulating type preheating furnaces, 21- blast furnace gases, 22- combustion airs, 23- combustion fans, 24- wind mixed chamber, 25- store
Hot type preheating furnace changement, 26- recuperative heater flue gases.
Wherein, it is preferred to use three recuperative heaters 201, it is ensured that hot blast is continuously provided for lime kiln system, when
When one heating furnace is safeguarded, remaining 2 heating furnace can also maintain to produce.
Wherein, three recuperative heaters are burning stove using " two, which burn one, send " mode of operation, the recuperative heater 201
When use blast furnace gas 21 and combustion air 22；Cold wind is then CO from limekiln systematic collection, by dedusting2Gas,
It is heated stove 201 and is heated to 800 DEG C ~ 1200 DEG C, then the hot-blast spray nozzle through being circular layout sends back to limekiln 100.
The operation principle of the heating furnace 201 is：Burning in the stove cycle：Blast furnace gas 21 enters accumulation of heat with combustion air 22
The burner of formula heating furnace 201 is burnt, the high-temperature flue gas of 1100 DEG C ~ 1300 DEG C of generation, for heat-storing material in heating furnace；
Blowing in the cycle：Burner is closed, and is passed through cold CO2Gas, cold CO2Gas is collected, after dedusting from limekiln 100
A part of CO2, the CO2Gas is heated the heat-storing material heating of stove 201, constant with one in the range of 800 DEG C ~ 1200 DEG C
Hot-blast spray nozzle of the temperature through being circular layout send back to limekiln 100.Heating furnace group " two, which burn one, the send " mode of operation, i.e., it is same
When there are 2 heating furnaces to burn stoves, 1 heating furnaces air-supply.
Dust collector is arranged at the bottom of heating furnace 201, is easy to dust collection, heating is cleaned out when routine repairs
Stove.
The flue gas of the heating furnace 201 is discharged after need to typically continuing cooling, dedusting.There is various selectable technical scheme
The flue gas of heating furnace 201 is cooled, the preferable technical scheme of the utility model is：The flue gas of heating furnace 201 is accessed
Wind mixed chamber 24, adjust the combustion air temperature from preheating furnace 202.
The shell of two heat accumulating type preheating furnaces 202 is metal structure steel, sets insulating lining, arch knot is arranged at top
Structure, bottom are regenerator, and regenerator has heat-storing material, and the preferred grid brick form of heat-storing material, heat-resisting cast iron is arranged at checker brick bottom
Waste gas outlet and combustion air inlet are arranged at support meanss, the bottom of heat accumulating type preheating furnace 202, and checker brick top has combustion air to go out
Mouthful, preheating furnace bottom sets dust collection structure, and arch top sets the air inlet of High-temperature cooling air 50, from kiln body 100
High-temperature cooling air 50 enter preheating furnace 202 from the arch top of heat accumulating type preheating furnace 202 through air inducing pipeline.
High-temperature cooling air 50 from kiln body 100 enters through piping at the top of the arch of the 1st heat accumulating type preheating furnace 202
Enter preheating furnace, the heat-storing material of heat storage room, discharged after cooling from waste gas outlet, discharged after removing dust；
It is high by switch valve after the 1st preheater heat-storing material is warmed to design temperature, completes a wheel " heating "
Warm cooling air 50 enters the 2nd heat accumulating type preheating furnace 202 by pipeline, heats the heat-storing material of the 2nd preheating furnace regenerator；
Meanwhile cold combustion air 22 enters the 1st heat accumulating type preheating furnace 202 from bottom, through regenerator heat-storing material heating after from
Heat-storing material top is discharged, into wind mixed chamber 24；Wind mixed chamber also accesses cold combustion air and the useless cigarette from heating furnace 201
Gas, for adjusting the temperature of combustion air 22, combustion air 22 is added with a fixed temperature from wind mixed chamber 24 into heat accumulating type
Hot stove 201.
The collecting mechanism that a small amount of dust that High-temperature cooling air 50 carries is preheated the bottom of stove 202 collects, in day
Preheating furnace is cleaned out during normal plant maintenance.
For person of ordinary skill in the field, with the development of technology, the utility model design can be different
Mode is realized.Embodiment of the present utility model is not limited in embodiments described above, and can be in the model of claim
It is changed in enclosing.
Claims (8)
- A kind of 1. full recovery CO2Lime kiln device, including kiln body and heating furnace group, it is characterised in that：The kiln body includes feeder Structure and discharging mechanism, the workspace of the kiln body include preheating section, calcining section, cooling section, are provided with kiln body interior from top to bottom Sleeve, the material channel of material movement, the beam overall in the material channel section are formed between kiln body inwall and inner sleeve drum outer wall Spend for latus rectum, material channel is different in the latus rectum of preheating section, calcining section, cooling section, and mineral aggregate enters kiln body from feed mechanism, along thing Expect that passage passes through cooling section from preheating section to calcining section, finished product along material channel, finally discharge kiln body, the kiln from discharging mechanism CO is provided with body calcining section side wall2Hot wind inlet, heating furnace group is by CO2CO is formed after being heated to design temperature2Hot blast is sent to The mineral aggregate after preheating is calcined in kiln body, CO is provided with the top of kiln body2Retracting device, inner sleeve are located at the top of cooling section Air inlet is provided with, the space that cooling air is entered between kiln body and inner sleeve from the bottom of kiln body is cold to lime stone finished product But entered after from air inlet in inner sleeve and be extracted kiln body from top.
- A kind of 2. full recovery CO as claimed in claim 12Lime kiln device, it is characterised in that material channel is in calcining section and cold But there is changeover portion, changeover portion latus rectum reduces, and forms material sealing between section.
- A kind of 3. full recovery CO as claimed in claim 22Lime kiln device, it is characterised in that the material channel of the kiln body is excellent Be selected in preheating pars infrasegmentalis, calcining section in the middle part of latus rectum it is larger, calcining pars infrasegmentalis latus rectum reduce, after changeover portion, cooling down The latus rectum of section is larger.
- A kind of 4. full recovery CO as claimed in claim 32Lime kiln device, it is characterised in that the material channel of the kiln body exists The preferred scope for calcining maximum diameter and the ratio of the minimum latus rectum of calcining pars infrasegmentalis in the middle part of section is 2~3.5, the kiln body Material channel is 2~3.5 in the preferred scope of the maximum diameter and the ratio of changeover portion latus rectum of cooling section.
- A kind of 5. full recovery CO as claimed in claim 12Lime kiln device, it is characterised in that inner sleeve is internally provided with depositing dust There is dust collecting device, its underpart, and its top is connected with induced duct, and induced duct is used for the cooling air of high temperature from kiln body Top is extracted out, and the High-temperature cooling air being extracted is used to heat combustion-supporting gas.
- A kind of 6. full recovery CO as claimed in claim 12Lime kiln device, it is characterised in that heating furnace group adds including heat accumulating type Hot stove, heat accumulating type preheating furnace and wind mixed chamber, in the burning stove cycle of recuperative heater, the gaseous fuel of low heat value and from mixed The combustion air of air compartment enters burner combustion, the heat-storing material of the heat smoke heat storage room of generation；In recuperative heater The air-supply cycle in, CO2Gas enters heating furnace from heating furnace regenerator bottom, from regenerator top after heat-storing material heats Hot-blast outlet discharge heating furnace and be sent into kiln body.
- A kind of 7. full recovery CO as claimed in claim 62Lime kiln device, it is characterised in that the height being extracted at the top of from kiln body The heat-storing material that warm cooling air is used for inside heat storage formula preheating furnace, the heat-storing material after heating reheat combustion air, Heated combustion air is discharged into the wind mixed chamber from heat-storing material top, and the combustion air is adjusted to set by wind mixed chamber Fixed temperature, then it is passed to the recuperative heater.
- A kind of 8. full recovery CO as claimed in claim 12Lime kiln device, it is characterised in that CO2The set temperature value of hot blast Scope be 800 DEG C~1200 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720397478.1U CN207079173U (en) | 2017-04-17 | 2017-04-17 | A kind of full recovery CO2 lime kiln device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720397478.1U CN207079173U (en) | 2017-04-17 | 2017-04-17 | A kind of full recovery CO2 lime kiln device |
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| CN207079173U true CN207079173U (en) | 2018-03-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314336A (en) * | 2018-05-09 | 2018-07-24 | 王长春 | A kind of lime kiln device using circulating air |
| CN108675655A (en) * | 2018-06-28 | 2018-10-19 | 王长春 | A kind of lime kiln device using hot wind |
| WO2018192267A1 (en) * | 2017-04-17 | 2018-10-25 | 王长春 | Lime kiln device for fully recovering co2 |
| US20230228489A1 (en) * | 2020-08-21 | 2023-07-20 | Binder + Co Ag | Device for producing expanded granulated material |
| CN116477854A (en) * | 2023-05-16 | 2023-07-25 | 中冶长天国际工程有限责任公司 | Lime kiln equipment and control method based on carbon emission reduction |
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2017
- 2017-04-17 CN CN201720397478.1U patent/CN207079173U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018192267A1 (en) * | 2017-04-17 | 2018-10-25 | 王长春 | Lime kiln device for fully recovering co2 |
| CN108314336A (en) * | 2018-05-09 | 2018-07-24 | 王长春 | A kind of lime kiln device using circulating air |
| CN108675655A (en) * | 2018-06-28 | 2018-10-19 | 王长春 | A kind of lime kiln device using hot wind |
| US20230228489A1 (en) * | 2020-08-21 | 2023-07-20 | Binder + Co Ag | Device for producing expanded granulated material |
| US11859905B2 (en) * | 2020-08-21 | 2024-01-02 | Omya International Ag | Device for producing expanded granulated material |
| CN116477854A (en) * | 2023-05-16 | 2023-07-25 | 中冶长天国际工程有限责任公司 | Lime kiln equipment and control method based on carbon emission reduction |
| CN116477854B (en) * | 2023-05-16 | 2024-09-17 | 中冶长天国际工程有限责任公司 | A lime kiln equipment based on carbon emission reduction and control method thereof |
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