CN204625479U - A kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas - Google Patents
A kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas Download PDFInfo
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- CN204625479U CN204625479U CN201520084694.1U CN201520084694U CN204625479U CN 204625479 U CN204625479 U CN 204625479U CN 201520084694 U CN201520084694 U CN 201520084694U CN 204625479 U CN204625479 U CN 204625479U
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- rotary kiln
- gas
- lime
- carbonic acid
- acid gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The utility model provides a kind of indirect calcination to produce lime, reclaims the rotary kiln device of carbonic acid gas.For the 20mm-40mm small grain size Wingdale by mining production, by rotary kiln inner core fuel in combustion chamber burning, radiation delivery heat carries out indirect calcination to the Wingdale of rotary kiln urceolus, by combustion chamber and calcining compartment completely isolated.Decomposition of limestone after calcination is calcium oxide and carbonic acid gas, calcium oxide enters ash silo by being discharged by ash discharging gear after cooling, carbonic acid gas carries out preheating by preheater to Wingdale, after effuser is collected, produce dry ice again through dedusting, drying, pressurization, liquefying plant and dry ice device; In combustion chamber after coal gas or coal dust firing, the waste gas of generation to Wingdale indirect preheating, carries out waste heat recovery by preheater after purification; The waste heat that water cooler cooling calcium oxide produces is as secondary combustion-supporting wind.This invention can production high-quality quickened lime, saving resource, also can reduce carbon emission and Greenhouse effect.
Description
Technical field
The utility model relates to metallurgy, chemical technology field, especially metallurgy industry calcined limestone production high-performance quickened lime, utilizes and produces the device that carbon dioxide produces dry ice.
Background technology
Copenhagen climate change investigation in 2009, makes low-carbon economy become global focus.The Economic Development Mode of low-carbon economy based on less energy-consumption, low stain, low emission, it is the fundamental change of the mode of production to a large amount of fossil energy of existing consumption, a large amount of discharge carbonic acid gas, the Chinese government promises to undertake the year two thousand twenty, the CO2 emissions of per GDP than decline 40-45% in 2005, and is included into national economy and social development medium-term and long-term plans as the binding indicator.
Carbonic acid gas is as a kind of important resource, of many uses, and simultaneously the discharge of carbonic acid gas is also the one of the main reasons causing Global warming, and reclaiming carbonic acid gas so effective both can saving resource, also can reduce topsoil and Greenhouse effect.
For metallurgy industry, lime is the slag making materials of alkalescence steel-making.Main component is CaO.Quickened lime is compared with common lime, and slagging speed is fast, shorten the heat, and improves furnace life, reduces splash, have good desulfurization, dephosphorization effect, can significantly improve Steel Capacity and steel quality, and reduce smelting cost.For making lime rapid melting, rapid slagging, lime should have higher response capacity, containing lower impurity.The domestic and international main kiln type for calcination particulate lime is rotary kiln at present, this type of kiln is used for calcination 20-40mm small grain size Wingdale, the many bird's eye gravel lime stones abandoned of current China limestone mine can be made full use of, coal gas calcination together with Wingdale is adopted to produce quickened lime, for the comprehensive utilization of resources of China's limestone mine opens new way.For rotary system investment high, equipment is complicated, troublesome maintenance, more importantly construction cost is high, finished product ton ash cost is higher, ben is because lime burns together with fuel mix, decompose the carbonic acid gas produced and contain residual coal gas, be difficult to the carbonic acid gas reclaiming discharge, the high-temperature flue gas that burning produces is due to containing a large amount of dust, and recovery difficult is larger, pollute environment and energy dissipation, do not want to adapt to the recycling economy of national requirements, low-carbon emission.Lime burns together with fuel mix in addition, and particularly calcination process increases Coal powder spray again, and lime quality is obviously reduced, and impurity improves, and sulphur content increases, and increases next procedure steel desulfurization cost and slag making difficulty.
The gas that the manufacture of current domestic dry ice is mainly produced by petrochemical industry passes through to purify and obtain carbonic acid gas after catalyzed oxidation, then through removing objectionable impurities, cooling, pressurization are produced into liquid carbon dioxide, manufacture dry ice by dry ice device.The method is from raw materials cost or production run cost is all higher.
Utility model content
Produce the problems referred to above of lime existence for existing rotary kiln, the main purpose of the technical scheme that the utility model provides is:
There is provided a kind of indirect calcination to produce lime, reclaim the rotary kiln device of carbonic acid gas.
To achieve these goals, the utility model have employed following technical scheme:
Indirect calcination is produced lime, is reclaimed a rotary kiln device for carbonic acid gas, wherein, comprising:
Inner/outer tube rotary kiln;
Rotary kiln arranges inner core combustion chamber, produces thermal source in order to burning;
Rotary kiln urceolus, is treated calcined limestone in order to place, and is separated by inner/outer tube heat transfer wall and combustion chamber;
Effuser, connects preheating material road, in order to gather the gas that rotary kiln urceolus lime calcining produces;
Waste pipe, connects preheating gas room, in order to gather the gas that combustion chambers burn produces;
Dry ice device, is connected with described effuser, is processed into dry ice in order to the described gas gathered by described effuser.
Waste-heat recovery device, is connected with described waste gas of combustion chamber pipe, and produces steam in order to the waste gas heat utilization gathered by described waste pipe.
Another aspect of the present utility model, also comprises the indirect preheating room be arranged at above kiln tail, in order to the Wingdale that preheating is to be calcined; Described preheating gas room is by pipeline and described rotary kiln combustion chamber UNICOM, and the waste gas that burning produces enters gas sampling pipe after the indirect preheating Wingdale of preheating gas room; Described preheating lime stone room and described rotary kiln urceolus calcined limestone room UNICOM, the gas of generation enters effuser through intermediate bin, preheater preheats Wingdale behind room;
Another aspect of the present utility model, described gas sampling pipeline is connected with residual heat using device through dedusting, variable frequency adjustment blower fan.
Another aspect of the present utility model, described effuser is connected with dry ice device through dedusting, waste-heat recovery device, variable frequency adjustment blower fan, and the waste heat of collection is connected with device for utilizing residual heat of waste gas.
Another aspect of the present utility model, the belt transporting Wingdale is provided with above described preheating lime stone room, described belt is provided with a dumping device, in order to the discharge opening unloading Wingdale to top, described preheating lime stone room, described discharge opening is provided with closed cover plate.
Another aspect of the present utility model, rotary kiln head is provided with water cooler, and cool fast in order to lime calcining produced, cooled lime is sent through transfer roller and entered finished bin.Freezing air takes away heat when cool lime, as secondary combustion-supporting wind.
Another aspect of the present utility model, the fuel of described combustion chamber is coal dust and/or coal gas.
Another aspect of the present utility model, described heat transfer wall is that fire-resistant heat-transfer matcrial or heat-resisting alloy steel are made.
Another aspect of the present utility model, is also sequentially set with the refining plant in order to Purge gas between described effuser and described dry ice device, in order to the drying installation of dry gas, and in order to the pressurizing device by liquefaction of gases.
By the enforcement to technical solutions of the utility model, following technique effect can be obtained:
1, quickened lime quality product is high, and product purity improves, and sulphur content reduces, and is particularly suitable for the interpolation slag making of smelting stainless steel and high strength, high-quality iron and steel kind;
2, calcination of lime is even, is easy to control, and activity degree is good.Under the prerequisite supplying qualified Wingdale and fuel, the activity degree of quickened lime reaches more than 360ml, and normal production does not produce or lower Extend position;
3, thermo-efficiency is high, decomposition temperature is easy to control, avoid energy dissipation, the per-cent accounting for total heat consumption for decomposition of limestone thermal losses is the highest in all kinds of kiln shape, unit product thermal losses is low, and can make full use of coal dust firing, or blast furnace, converter, coke oven and mixed gas carry out calcination as fuel;
The flue gas temperature of 4, discharging is high, and recoverable, is converted to steam and generates electricity;
The carbonic acid gas of 5, discharging is easy to purification, obtains pure carbonic acid gas, obtains food grade dry ice through processing treatment, industrial wastes is utilized effectively, and is conducive to solving the problem of environmental pollutions such as carbon emission;
7, can calcination 20-40mm small grain size Wingdale, the existing discarded limestone resource of China can be made full use of.
8, contrast common rotary kiln type, indirect calcination rotary kiln utilizes radiant heat calcination to produce lime, and whole system equipment is simple, easy temperature control; processing ease, easy to maintenance, cost is lower; meeting recycling economy, is the developing direction realizing lime manufacturing process energy-saving and emission-reduction and environment protection.
Accompanying drawing explanation
Fig. 1 is that a kind of indirect calcination of the present utility model is produced lime, reclaimed the structural representation of the rotary kiln device of carbonic acid gas.
Fig. 2 is that a kind of indirect calcination of the present utility model is produced lime, reclaimed the rotary kiln device schematic cross-section of carbonic acid gas.
Embodiment
Be described the technical solution of the utility model below by way of specific embodiment, with under the conflict free prerequisite of the purpose of this utility model, the technical characteristic in the embodiment hereinafter mentioned and embodiment can combine mutually.
As shown in Figure 1, the technical scheme that the utility model adopts is: utilize coal dust or coal gas to produce heat by heat transfer wall 19 in rotary kiln combustion chamber 10 combustion, make Wingdale be heated to 1050-1100 degree decomposition temperature and carry out indirect calcination, produce qualified high-performance quickened lime and pure carbonic acid gas, waste gas residual heat produces steam and is recycled utilization.
A kind of indirect calcination of the utility model produces lime, the rotary kiln device embodiment of recovery carbonic acid gas comprises: rotary kiln combustion chamber 10, in order to coal gas or coal dust firing, calcining compartment 11 treats calcined limestone in order to place, and is separated by heat transfer wall 19 and combustion chamber 10; Effuser 61, connects a plurality of preheating lime stone room 4, gathers the gas after preheating lime stone; In order to processing and fabricating dry ice; Waste pipe 81, connects a plurality of preheating gas room, gathers the waste gas after preheating lime stone, in order to heat recovery;
The utility model embodiment relates to a kind of indirect calcination and produces lime, reclaims the rotary kiln device of carbonic acid gas, as schemed shown in I, mainly comprising Wingdale is transported to above preheater by belt 21, Wingdale adds in preheating lime stone room 4 by discharge opening 2 by dumping device 1, discharge opening 2 there is cover plate, opened by dump car when discharging, close after discharging.Exhaust pipeline 81 is connected with a plurality of preheating gas room 5 by pipeline, heat is delivered in preheating lime stone room 4 by heat transfer wall 22 by the heat of preheating gas room 5, preheating is carried out to Wingdale, Wingdale after preheating is by after feeding machine 6 timing to intermediate bin 7 further preheating, by hydraulic push rod 8, Wingdale is delivered in rotary kiln 12 through feeding mouth 9, fast decoupled is carried out when arriving calcination band, enter the vertical cooling room 18 of kiln hood after decomposition to cool, the hot gas that cooling produces is circulated by pipeline and blower fan 16 as secondary combustion-supporting wind, the finished product ash cooled enters ash silo 17 and is delivered continuously to lime finished bin by belt.
The gas that in rotary kiln urceolus 11, calcined limestone produces, preheating lime stone is carried out through intermediate bin 7, preheating is carried out again through 4 pairs, a plurality of preheating lime stone room Wingdale, after collect through effuser 61, gas after collection is through fly-ash separator 62, variable frequency adjustment blower fan 63 enters carbonic acid gas waste heat recovery 64, the waste heat reclaimed enters boiler afterheat recovering device 84, carbonic acid gas after cooling enters drying installation 65 and carries out drying treatment, by pressurizing device 66, carbon dioxide condensing is become liquid after drying treatment, dry ice device 67 under low pressure evaporates rapidly, condense into the ice and snow shape solid matter formation dry ice that one piece of block compresses.
Rotary kiln burner 23 delivered to by gas line or Coal powder spray pipeline 14, secondary combustion-supporting wind delivers to combustion chamber 10 by blower fan 16 pipeline 15, the waste gas that rotary kiln combustion chamber 10 produces is connected with preheating gas room 5 by exhaust pipeline 20, preheating is carried out to material road sodalime stone, waste gas after preheating is collected by gas sampling pipe 81 and is sent dust-removal system 82, variable frequency adjustment blower fan 83 regulates the flow of waste gas automatically, enter waste heat boiler 84 afterwards, steam pockets 85 carries out waste heat recovery, and steam Song Quan factory steam pipe system residual heat using device 86 produced is for full factory or carry out cogeneration.
Shaft cooler 18 cools the lime after calcined by rotary kiln, cooled hot blast passes through burner blower 16, pipeline 15 as rotary kiln secondary combustion-supporting wind, burner fuel adopts coal gas or coal dust to be sent into by pipeline 14, burn in combustion chamber, and transfer heat in calcined by rotary kiln room 11 by heat transfer wall 19, calcined limestone.
The utility model embodiment relates to a kind of indirect calcination and produces lime, reclaims the rotary kiln device sectional view of carbonic acid gas, as shown in Figure 2.Rotary kiln 12 rotates by counterclockwise 26, and burner 23 is arranged on rotary kiln central position, and rotary kiln inner core 10 is as combustion chamber and by heat transfer wall 19, heat is passed to calcining compartment sodalime stone 24, and Wingdale 24 rolling thermally equivalent in rotary kiln 12 is calcined.Rotary kiln 12 outer wall adopts abrasion-proof and refractory thermal insulation layer 25, reduces calorific loss.
It should be noted that in embodiment, burner combustion system can adopt oxygen-enriched combusting further, energy-saving and cost-reducing, reduces costs.
It should be noted that in above-mentioned embodiment, the quantity of preheating lime stone room 4 and preheating gas room 5, carry out composite design according to lime actual production output.
In a kind of embodiment of the present utility model, heat transfer wall 19 can adopt fire-resistant heat-transfer matcrial or steel alloy to make.
Be not difficult to find, the utility model is by utilizing radiant heat calcination quickened lime, separate completely isolated between combustion chamber and calcination, not only can obtain the quickened lime of higher quality, and pure carbonic acid gas can be recovered to, processing and manufacturing is food grade dry ice, and the high-temp waste gas that burning produces also can direct remanufacture steam, carries out secondary use.Avoid Wingdale to contact with coal dust, the direct of coal gas compared with other rotary kiln lime kilning cubic meter of stone methods, make quickened lime, carbonic acid gas cleaner, lower containing impurity such as S, P, for the production of domestic quickened lime, dry ice and the integrated application of resource open the new a kind of approach more having market outlook, really respond national policy, achieve recycling economy and low-carbon energy-saving reduces discharging.
The above embodiments are only that part of the present utility model embodies; can not contain all of the present utility model; on the basis of above-described embodiment and accompanying drawing; those skilled in the art can obtain more embodiment according to the utility model under the prerequisite not paying creative work; and similar transformation is carried out to other similar kiln types, therefore these embodiments obtained under not paying the prerequisite of creative work all should be included in protection domain of the present utility model.
Claims (10)
1. indirect calcination is produced lime, is reclaimed a rotary kiln device for carbonic acid gas, it is characterized in that, comprising:
Inner/outer tube rotary kiln;
Rotary kiln arranges inner core combustion chamber, produces thermal source in order to burning;
Rotary kiln urceolus, is treated calcined limestone in order to place, and is separated by inner/outer tube heat transfer wall and combustion chamber;
Effuser, connects preheating material road, in order to gather the gas that rotary kiln urceolus lime calcining produces;
Waste pipe, connects preheating gas room, in order to gather the gas that combustion chambers burn produces;
Dry ice device, is connected with described effuser, is processed into dry ice in order to the described gas gathered by described effuser;
Waste-heat recovery device, is connected with described waste gas of combustion chamber pipe, and produces steam in order to the waste gas heat utilization gathered by described waste pipe.
2. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, and it is characterized in that, also comprise the indirect preheating room be arranged at above kiln tail, described preheating chamber is by pipeline and combustion chamber UNICOM.
3. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, and it is characterized in that, also comprise the cooling room be arranged at below combustion chamber, cooling room cools the Wingdale calcined.
4. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, it is characterized in that, also comprise exhaust pipeline and waste heat boiler, described exhaust pipeline is connected to gather the waste gas with heat that combustion chamber produces with combustion chamber, and described waste gas is passed to described waste heat boiler.
5. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, it is characterized in that, the belt, the dumper that transport Wingdale is provided with above described water cooler, in order to the discharge opening unloading Wingdale to water cooler, described discharge opening is provided with closed cover plate.
6. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, it is characterized in that, also comprise rotary kiln head and be provided with water cooler, cool fast in order to lime calcining produced, cooled lime is sent through transfer roller and is entered finished bin.Freezing air takes away heat when cool lime, after dedusting, be incorporated to waste-heat recovery device.
7. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, it is characterized in that, also comprises correspondence below preheater and arrange hydraulic push rod feeding machine, in order to be delivered in limestone kiln by the Wingdale after preheating.
8. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, and it is characterized in that, the fuel of described combustion chamber is coal dust and/or coal gas, and combustion oxygen.
9. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, and it is characterized in that, described insulated wall is that steel alloy or fire-resistant heat-transfer matcrial are made.
10. a kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas as claimed in claim 1, it is characterized in that, the refining plant in order to Purge gas is also sequentially set with between described effuser and described dry ice device, in order to the drying installation of dry gas, and in order to the pressurizing device by liquefaction of gases.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084694.1U CN204625479U (en) | 2015-02-03 | 2015-02-03 | A kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520084694.1U CN204625479U (en) | 2015-02-03 | 2015-02-03 | A kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas |
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| CN204625479U true CN204625479U (en) | 2015-09-09 |
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| CN201520084694.1U Expired - Fee Related CN204625479U (en) | 2015-02-03 | 2015-02-03 | A kind of indirect calcination is produced lime, is reclaimed the rotary kiln device of carbonic acid gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314894A (en) * | 2015-02-03 | 2016-02-10 | 李正福 | Rotary kiln device and method for indirectly producing lime and recycling carbon dioxide |
| CN112624634A (en) * | 2020-12-16 | 2021-04-09 | 张照鹏 | Desulfurization and decarburization system and desulfurization and decarburization method |
-
2015
- 2015-02-03 CN CN201520084694.1U patent/CN204625479U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314894A (en) * | 2015-02-03 | 2016-02-10 | 李正福 | Rotary kiln device and method for indirectly producing lime and recycling carbon dioxide |
| CN112624634A (en) * | 2020-12-16 | 2021-04-09 | 张照鹏 | Desulfurization and decarburization system and desulfurization and decarburization method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20180203 |