CN204625480U - A kind of rotary kiln device of constant temperature indirect calcination Wingdale - Google Patents

A kind of rotary kiln device of constant temperature indirect calcination Wingdale Download PDF

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Publication number
CN204625480U
CN204625480U CN201520226649.5U CN201520226649U CN204625480U CN 204625480 U CN204625480 U CN 204625480U CN 201520226649 U CN201520226649 U CN 201520226649U CN 204625480 U CN204625480 U CN 204625480U
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wingdale
rotary kiln
gas
preheating
constant temperature
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CN201520226649.5U
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李正福
李宁燕
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李正福
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The utility model provides a kind of rotary kiln device of constant temperature indirect calcination Wingdale.Coal gas and air mixed burning in process furnace, blow when wind-warm syndrome reaches set(ting)value, deliver in rotary kiln inner core hot air chamber, to rotary kiln urceolus, calcination is carried out to 20mm-40mm small grain size Wingdale by radiation delivery heat, make hot air chamber and calcining compartment completely isolated, lime kilning stone decomposites calcium oxide, discharged by ash discharging gear after cooling and enter ash silo storage, produce carbon dioxide by connect preheater preheating is carried out to Wingdale, after through effuser collect through dedusting, drying, pressurization, liquefaction and dry ice device production dry ice.The waste gas that burning produces and the waste heat that cooling calcium oxide produces carry out waste heat recovery to after coal gas, preheating of air.This utility model adopts external burning, calcining at constant temperature Wingdale, not only can obtain impure few high-quality quickened lime, and can reclaim carbonic acid gas, reduces carbon emission, meets recycling economy.

Description

A kind of rotary kiln device of constant temperature indirect calcination Wingdale
Technical field
The utility model relates to metallurgy, chemical technology field, and especially metallurgy industry utilizes rotary kiln calcining at constant temperature Wingdale production high-performance quickened lime, and reclaims the device of carbon dioxide.
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 the current rotary kiln mode of production, Wingdale burns together with fuel mix, temperature of combustion fluctuation is large, and the raw burning rate of limestone calcination is high, wayward, and the carbonic acid gas decomposing generation contains 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.Current most enterprises in addition, for reducing production cost and coke-oven gas usage quantity, when calcined limestone, spray into coal dust, be mixed with coal gas and burn, quickened lime quality is reduced further, impurity improves, sulphur content increases, and increases next procedure steelmaking process desulphurization cost and slag making difficulty, also affects smelting iron and steel product quality and performances.
The acquisition of current domestic carbonic acid gas, obtains carbonic acid gas after the gas mainly produced by petrochemical industry passes through purification and catalyzed oxidation, then through removing objectionable impurities, carbonic acid gas or liquid carbon dioxide are produced in cooling, pressurization.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:
A kind of rotary kiln device of constant temperature indirect calcination Wingdale is provided.
To achieve these goals, the utility model have employed following technical scheme:
A rotary kiln device for constant temperature indirect calcination Wingdale, wherein, comprising:
Process furnace, arranges two top ignition process furnace, adopts a heating one to send heat;
Inner/outer tube rotary kiln, inner core is hot air chamber, and the hot blast of process furnace delivers to inner core; Urceolus treats calcined limestone in order to place, and arranges heat transfer wall between inner/outer tube;
Preheating chamber, in order to the Wingdale that indirect preheating is to be calcined;
Another side of the present utility model, also comprises top ignition process furnace and utilizes coal gas and air after preheating, and send into process furnace burning and blow to during set(ting)value, set(ting)value is 1100-1200 degree, and temperature is adjustable, and during air-supply, another process furnace burns, and hockets;
Another side of the present utility model, also comprises preheating chamber, comprises a plurality of preheating gas room and preheating lime stone room, and a plurality of preheating gas room, by pipeline and described rotary kiln inner core hot air chamber UNICOM, enters gas sampling pipe after the indirect preheating lime stone of hot blast; Described a plurality of 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 side of the present utility model, the gas also comprising effuser collection is connected with dry ice device through dedusting, waste-heat recovery device, variable frequency adjustment blower fan, and the waste heat of recovery is connected with residual heat using device;
Another side of the present utility model, also comprise the belt being provided with above preheating lime stone room and transporting Wingdale, 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 side of the present utility model, 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, the heat preheating gas that cool lime is taken away and air, enter waste-heat recovery device afterwards;
Another side of the present utility model, also comprising fuel is blast furnace gas or mixed gas; Heat transfer wall is that fire-resistant heat-transfer matcrial or heat-resisting alloy steel are made;
Another side of the present utility model, also comprises the refining plant be also sequentially set with between effuser and described dry ice device in order to Purge gas, in order to the drying installation of dry gas, and in order to the pressurizing device by liquefaction of gases;
Another side of the present utility model, also comprises waste-heat recovery device, in order to the waste heat of effuser, waste pipe and cooling quickened lime in recovery system.
By the enforcement to technical solutions of the utility model, following technique effect can be obtained:
1, constant temperature heat calcined limestone, makes quickened lime quality product high, and 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, and raw burning rate is low.Under the prerequisite of the qualified Wingdale of supply, the activity degree of quickened lime reaches more than 360ml, and normal production does not produce or lower Extend position;
3, low combustion value furnace gas is utilized, decomposition temperature is easy to control, and avoids energy dissipation, and 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 mixed gas also can be utilized to burn as fuel;
The flue gas of 4, discharging and the rear waste gas produced of process furnace burning are recycled after preheating gas, are converted to steam and generate 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, calcining at constant temperature rotary kiln utilizes radiant heat calcination quickened 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 the structural representation of the rotary kiln device of constant temperature indirect calcination Wingdale of the present utility model.
Fig. 2 is the rotary kiln device schematic cross-section of constant temperature indirect calcination Wingdale of the present utility model.
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 blast furnace gas or mixed gas in top combustion stove (81,92) combustion, and burning produces constant temperature heat and sends rotary kiln inner core hot air chamber (10) back to.By heat transfer wall (19) transferring heat, make rotary kiln urceolus sodalime stone be heated to about 1100 degree 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 embodiment of the rotary kiln device of constant temperature indirect calcination Wingdale of the present utility model comprises: top ignition process furnace (81,92), rotary kiln inner core (10), burn in order to blast furnace gas or mixed gas (86) and a certain proportion of air (87), burn to 1100-1200 degree and carry out automatic ventilating operation; Rotary kiln urceolus (11) treats calcined limestone (24) 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 heat pipe (71), connects a plurality of preheating gas room (5), gathers the waste gas residual heat after preheating lime stone, carries out heat recovery;
The utility model embodiment relates to a kind of rotary kiln device of constant temperature indirect calcination Wingdale, 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), (2) have cover plate to discharge opening, opened by dump car when discharging, close after discharging.Exhaust pipeline (71) 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), process furnace (81 is utilized when arriving calcination band, 92) heat of high temperature produced, rotary kiln inner core hot air chamber (10) is given through pipeline (14), fast decoupled is carried out again through heat transfer wall (19) transferring heat, the vertical cooling room (18) entered after decomposition of limestone in kiln hood (13) cools, the hot gas that cooling produces is by pipeline and blower fan (16) preheating gas (86) and air (87), the finished product ash cooled enters ash silo (17) and is delivered continuously to lime finished bin by belt.
Coal gas (86), air (87) are delivered at gas fitting (88), air assembly (89) by respective supply air system, preheating is carried out in primary heater unit (90), coal gas (86) after preheating, air (87), enter combustion chamber mixed firing by pipeline from top ignition process furnace gas entry (83), gas inlet (82).Rotary kiln (12) inner core hot air chamber (10) is delivered to by air outlet (84), pipeline (14) during air-supply.Hotblast stove (92) structure is the same with hotblast stove (81), and hotblast stove (81,92) operation employing one is burnt and sent working system, arranges valve and automatically switch between each gangway.Hot blast stove design air-supply wind-warm syndrome is 1100-1200 degree, can regulate according to the performance of different raw material limestone.Waste heat of flue gas of heating furnace is through hotblast stove outlet (85), the waste heat that cool lime produces enters through fan (16) and pipeline and reclaims through primary heater unit (90), after preheating gas (86), air (87), deliver to waste-heat recovery device (74) through pipeline again and carry out waste heat recovery, and primary heater unit (90) configuration accident afterwards chimney (91).
The gas that the interior calcined limestone of rotary kiln urceolus (11) produces, preheating lime stone is carried out through intermediate bin (7), through a plurality of preheating lime stone room (4), preheating is carried out to Wingdale again, 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 (74), 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.
Process furnace hot blast delivers to rotary kiln hot air chamber (10) by pipeline (14), rotary kiln hot air chamber (10) by heat transfer wall (19) transferring heat to rotary kiln urceolus (11), Wingdale is calcined, waste heat is connected with preheating gas room (5) by pipeline (20), to preheating lime stone room (4), preheating is carried out to Wingdale by heat transfer wall (22), gas after preheating is collected by collection tube (71) and is sent dust-removal system (72), variable frequency adjustment blower fan (73) regulates the flow of waste gas automatically, the heat produced with carbonic acid gas waste-heat recovery device (64) afterwards, and by preheating gas device (88), waste heat after air assembly (89) enters waste heat boiler 74 together, steam pockets 75 carries out waste heat recovery, the waste heat reclaimed through steam Song Quan factory steam pipe system that residual heat using device 76 produces for full factory or carry out cogeneration.
The rotary kiln device sectional view of a kind of constant temperature indirect calcination Wingdale that the utility model embodiment relates to, as shown in Figure 2.Rotary kiln 12 rotates by counterclockwise 26, burner 23 is arranged on rotary kiln central position, rotary kiln inner core 10 is as hot air 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 urceolus 12 is calcined.Rotary kiln 12 outer wall adopts antiwear heat resisting thermal insulation layer 25, reduces calorific loss.
It should be noted that in embodiment, top ignition process furnace can adopt other form as internal combustion type process furnace, and firing system also can adopt oxygen-enriched combusting further, energy-saving and cost-reducing, reduces costs.
What further illustrate is in above-mentioned embodiment, and the quantity of preheating lime stone room 4 and preheating gas room 5 carries out composite design according to lime actual production output.
What further illustrate is that hot blast stove system controls to adopt PLC to control, and arranges automatic combustion, certainly moves furnace control system, shorten the air-supply time and realize combustion optimisation.
The utility model is provided with temperature-detecting device in addition, pressure-detecting device, detection of gas flow rate, and the proofing unit such as oxygen level, oxynitride, sulfurous gas, and coupling system technique, Control System Software carry out unifying to control, and realize full-automatic production.
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 burnt by top ignition process furnace, constant temperature is blown, utilize radiant heat calcination quickened lime, separate completely isolated between hot air chamber and calcination, not only can obtain the quickened lime of higher quality, and can be recovered to pure carbonic acid gas, processing and manufacturing is food grade dry ice.The waste heat that process furnace burning produces in addition high-temp waste gas, cool lime produce and the waste heat that preheating lime stone produces can direct remanufacture steam, carry out secondary use.Compared with other rotary kiln lime kilning cubic meter of stone methods, due to calcining at constant temperature, not only reduce the raw burning rate of quickened lime, improve activity degree, and avoid Wingdale and contact with the direct of fuel, 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, achieve recycling economy and low-carbon energy-saving reduction of 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 (9)

1. a rotary kiln device for constant temperature indirect calcination Wingdale, is characterized in that, comprising:
Process furnace, arranges two top ignition process furnace, adopts a heating one to send heat;
Inner/outer tube rotary kiln, inner core is hot air chamber, and the hot blast of process furnace delivers to inner core; Urceolus treats calcined limestone in order to place, and arranges heat transfer wall between inner/outer tube;
Preheating chamber, in order to the Wingdale that indirect preheating is to be calcined.
2. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that, top ignition process furnace utilizes coal gas and air after preheating, send into process furnace burning to blow to during set(ting)value, set(ting)value is 1100-1200 degree, temperature is adjustable, and during air-supply, another process furnace burns, and hockets.
3. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that, described preheating chamber comprises a plurality of preheating gas room and preheating lime stone room, a plurality of preheating gas room, by pipeline and described rotary kiln inner core hot air chamber UNICOM, enters gas sampling pipe after the indirect preheating lime stone of hot blast; Described a plurality of 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.
4. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, is characterized in that, comprise the gas that effuser collects and be connected with dry ice device through dedusting, waste-heat recovery device, variable frequency adjustment blower fan, the waste heat of recovery is connected with residual heat using device.
5. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that, comprise the belt being provided with above preheating lime stone room and transporting Wingdale, 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.
6. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that, comprise rotary kiln head and be provided with water cooler, lime in order to calcining to be produced cools fast, cooled lime is sent through transfer roller and is entered finished bin, the heat preheating gas that cool lime is taken away and air, enter waste-heat recovery device afterwards.
7. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that fuel is blast furnace gas or mixed gas, heat transfer wall is that fire-resistant heat-transfer matcrial or heat-resisting alloy steel are made.
8. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, it is characterized in that, comprise the refining plant be also sequentially set with between effuser and described dry ice device in order to Purge gas, in order to the drying installation of dry gas, and in order to the pressurizing device by liquefaction of gases.
9. the rotary kiln device of constant temperature indirect calcination Wingdale as claimed in claim 1, is characterized in that, comprise waste-heat recovery device, in order to the waste heat of effuser, waste pipe and cooling quickened lime in recovery system.
CN201520226649.5U 2015-04-10 2015-04-10 A kind of rotary kiln device of constant temperature indirect calcination Wingdale Expired - Fee Related CN204625480U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105271841A (en) * 2015-04-10 2016-01-27 李正福 Rotary kiln device and method for constant temperature indirect calcination of limestone
CN110627384A (en) * 2019-10-18 2019-12-31 湖北大学 Process method for preparing active calcium oxide by oxygen-enriched calcination

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105271841A (en) * 2015-04-10 2016-01-27 李正福 Rotary kiln device and method for constant temperature indirect calcination of limestone
CN110627384A (en) * 2019-10-18 2019-12-31 湖北大学 Process method for preparing active calcium oxide by oxygen-enriched calcination

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Granted publication date: 20150909

Termination date: 20180410