CN102627418B - Compound lime kiln - Google Patents

Compound lime kiln Download PDF

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Publication number
CN102627418B
CN102627418B CN201210124833XA CN201210124833A CN102627418B CN 102627418 B CN102627418 B CN 102627418B CN 201210124833X A CN201210124833X A CN 201210124833XA CN 201210124833 A CN201210124833 A CN 201210124833A CN 102627418 B CN102627418 B CN 102627418B
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kiln
zone
cooling
burner
limestone
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CN201210124833XA
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CN102627418A (en
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贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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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
    • 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 invention relates to a compound lime kiln, comprising a kiln body, a charging equipment, a discharging equipment, a control system and an exhaust system.A preheating zone, a\calcining zone and a cooling zone are in the kiln body. A smoke outlet or a fume extractor is arranged in the preheating zone, and the smoke outlet or the fume extractor is connected with the exhaust system. A cooling tuyere is arranged in the cooling zone, and a cooling air inlet is connected with a cooling fan. Two to four granule kiln bins are arranged in the device. Granule hoppers, granule charging locks and cooling air outlets are arranged in the granule kiln bins. The underpart of the granule kiln bins are connected with the cooling zone. The cooling air outlet is connected with the exhaust system. Granule kiln bins are arranged in the device in the invention, exhaust gas after lime cooling is utilized to preheat granule limestone materials, and simultaneously large particle and granule materials are calcined, so that the preheating fully utilizes resources of limestones, effectively utilizes energy, reduces consumption and improves productivity. The cooling air does not enter the calcining zone, which is beneficial to an improving of calcining effects of the calcining zone, a reducing of a pressure load of the kiln body and an improving of qualities of the lime products.

Description

A kind of combined type limestone kiln
Technical field
The invention belongs to building materials, chemical production equipment technical field, relate to a kind of equipment of calcining materials, be specifically related to a kind of combined type limestone kiln of calcining size particles simultaneously.
Background technology
Lime is important material of construction, also is important source material metallurgical, chemical field, and prior art is to be raw material with rhombspar, Wingdale, adopts the shaft furnace lime kilning of band burning beam.The deficiency of process is like this: the direction that furnace gas flows in the shaft furnace is opposite with the direction that building stones flow, and namely building stones move from the top down, and furnace gas flows from bottom to top, the air resistance of building stones is big, and the gas segregation phenomenon appears in furnace pressure height easily, it is inhomogeneous to cause Wingdale to be heated, and influences quality product.The applicant the patent No. be the utility model patent of ZL200320111077.3 disclose a kind of in the external heating type limestone kiln, the firing system of this limestone kiln is provided with combustion tube of furnace beam and peripheral burner, combustion tube of furnace beam is provided with burner (burner), solved the distribution of calcining zone flame and heat effectively, improved efficiency of combustion, but combustion tube of furnace beam needs not only to slattern some heats, and increased equipment cost and process cost with heat-eliminating medium cooling beam body in the course of the work.
Can produce some short grained Wingdales in building stones production and gatherer process, small-particle Wingdale volume is little, and the slit is little between the particle, and air resistance is big.Large and small particle is mixed together calcining, and small-particle can fill up the space between the macrobead, can produce very high air resistance in the kiln body, and influence calcining effect causes to give birth to and burns or burning.Therefore, general calcined limestone is selected the building stones of granularity 30~100mm, and granularity can only abandon or change less than the 30mm building stones and use it for anything else, and this is a kind of waste of resource.
Because entering kiln body top and flue gas one from kiln after the cooling zone cool lime is by calcining zone, preheating zone from kiln body bottom, cooling air plays blowdown system on the other hand, cooling air passes whole burner hearth, influence the burning of calcining zone, increase the pressure load in the kiln body.
Summary of the invention
For overcome prior art deficiency, the invention provides a kind of combined type limestone kiln, make the waste gas after calcining back flue gas and the cool lime enter exhaust emission system respectively, and calcine the limestone material of size particles simultaneously, take full advantage of resource.
Combined type of the present invention limestone kiln comprises kiln body, apparatus for feeding, discharging equipment, Controlling System and exhaust emission system.Preheating zone, calcining zone and cooling zone are arranged in the kiln body.The preheating zone is provided with exhanst gas outlet or fume extractor, and exhanst gas outlet or fume extractor are connected with exhaust emission system.Cooling zone is provided with cooling air inlet, and cooling air inlet is connected with cooling blower.Device also is provided with 2~4 small-particle kiln storehouses and 2~4 airducts, and small-particle kiln storehouse is provided with small-particle hopper, airduct, cooling air inlet and cooling air outlet, and the bottom in small-particle kiln storehouse is communicated with cooling zone top.Airduct is positioned at the outside of kiln body, the entrance of airduct passes the middle part that the kiln wall inserts cooling zone, the entrance of airduct is positioned at the bottom of cooling zone, and the outlet of airduct is connected with the cooling air inlet in small-particle kiln storehouse, and the cooling air outlet in small-particle kiln storehouse is connected with exhaust emission system.
The limestone kiln is beam-type limekiln, sleeve kiln, arch bridge kiln, wheat Wurz kiln or Xinhua's wheat Wurz kiln.The top, preheating zone of beam-type limekiln is provided with suction bar, and calcining zone is provided with 1~5 layer of burning beam, every layer of 1~5 burning beam, and burning beam is provided with burner.Burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned burner.Burning beam is provided with beam body cooling infrastructure.The sleeve kiln is provided with combustion chamber, last inner core, following inner core and firebridge, the combustion chamber is divided into upper and lower two-layer, and every layer is provided with 3~8 combustion chambers, and same layer combustion chamber evenly arranged, link to each other by firebridge between the upper and lower layer combustion chamber staggered arrangement, each combustion chamber and inner core.The preheating zone of arch bridge kiln is provided with 1~5 suction bar, and calcining zone is provided with 1~5 grate firing and burns arch bridge, and every layer of 1~10 burning arch bridge and 2~20 burners, burner are positioned at the bottom at burning arch bridge two ends.The burning arch bridge is provided with the cavity of heat-eliminating medium circulation, and burner is gaseous fuel burners, liquid fuel burner or solid fuel burner, or the combination of said burner.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
It is 10~30cm small-particle work stone lime stone or rhombspar that combined type of the present invention limestone kiln is used for calcining simultaneously macrobead Wingdale that particle diameter is 20~80cm or rhombspar and particle diameter.
Combined type of the present invention limestone kiln is by setting up small-particle kiln storehouse, utilize the small-particle limestone material in the high-temp waste gas preheating small-particle kiln storehouse after the cool lime, the heat that utilizes macrobead lime to carry at cooling zone heats and calcining small-particle limestone material, calcine large and small granule materials simultaneously, take full advantage of limestone resource, effective use of energy sources reduces consuming, and improves production capacity.Flue gas after the cool lime after waste gas and the calcining separately enters exhaust emission system respectively, and cooling air does not enter calcining zone, disturbs the burning of calcining zone, is conducive to improve the calcining effect of calcining zone, alleviates the pressure load of kiln body, improves the quality of lime product.
Description of drawings
Fig. 1 is combined type of the present invention limestone kiln structural representation;
Fig. 2 is the structural representation of another embodiment of the present invention;
Fig. 3 is the present invention's structural representation of a scheme again.
Wherein:
1-charging lock, 2-suction bar, 3-kiln body, 4-burning arch bridge, 5-small-particle hopper, 6-airduct, 7-small-particle kiln storehouse, 8--cooling zone, 9-cooling air port, 10-discharging lock, 11-preheating zone, 12-calcining zone, 13-cooling air outlet, 14-cooling air inlet, 15-burner, 16-cooling blower, 17-sleeve kiln wall, 18-last inner core, 19-following inner core, 20-firebridge, 21-valve, 22-burning beam.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
Embodiment 1
Combined type of the present invention limestone kiln is beam-type limekiln as shown in Figure 1, comprises kiln body 3, apparatus for feeding, discharging equipment, Controlling System, 2 small-particle kiln storehouses 7, two airducts 6 and exhaust emission systems.Be provided with preheating zone 11, calcining zone 12 and cooling zone 8 in the kiln body.The preheating zone is provided with two suction bars 2, and suction bar is provided with 10 suction orifices, and suction bar is connected with exhaust emission system, and cooling zone is provided with cooling air port 9, and cooling air inlet is connected with cooling blower 16 by pipeline.Calcining zone is provided with two-layer burning beam 22,3 burning beams in upper strata, 2 burning beams of lower floor.Every burning beam is provided with 10 burners, and burner is the geseous fuel burner.Small-particle kiln storehouse is provided with small-particle hopper 5, cooling air inlet 14 and cooling air outlet 13, and the bottom in small-particle kiln storehouse is communicated with cooling zone top.Airduct is positioned at the outside of kiln body, and the entrance of airduct passes the middle part that the kiln wall inserts cooling zone 8, and the outlet of airduct is connected with small-particle kiln storehouse cooling air inlet 14, and cooling air outlet 13 is connected with exhaust emission system.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
Utilize the process of combined type of the present invention limestone kiln calcining materials to be, particle diameter is that the limestone block material of 40~80cm enters in the kiln body 3 of beam-type limekiln by charging lock 1 through apparatus for feeding, and the high-temperature flue gas after preheating zone 11 is by the calcining zone calcining materials carries out preheating to Wingdale.Limestone material after the preheating falls into calcining zone 12, and by the burner of the burning beam 22 ejection fuel calcined limestone material that burns, calcining temperature is 1200~1400 ℃, and the lime that is sintered into falls into cooling zone 8.The small-particle limestone material of 10~30cm enters small-particle kiln storehouse 7 through apparatus for feeding, small-particle hopper 5 and small-particle charging lock, enters small-particle kiln storehouse by the high temperature air after the cooling zone cool lime small-particle Wingdale is carried out preheating.Small-particle Wingdale after the preheating moves to cooling zone top downwards to be mixed with macrobead lime under the kiln body drop, and heat heating and calcining small-particle Wingdale by high temperature macrobead lime band become lime with the small-particle limestone calcination.Size particles lime together continues cooling through the bottom of cooling zone, goes out device through discharging lock 10 then.Fuel and combustion air enter burning beam 22 and burn, through burner ejection fuel and combustion-supporting gas burning calcined limestone, flue gas upwards moves the preheating Wingdale and enters suction bar by the suction orifice of suction bar 2, and to the exhaust emission system discharging, the temperature of discharging is lower than 150 ℃ through suction bar.Cooling air is bloated by cooling blower 16, enters the cooling zone cool lime through cooling air port 9, and the high temperature air after the cool lime enters small-particle kiln storehouse 7 through airduct 6, cooling air inlet 14, preheating small-particle limestone material.To the exhaust emission system discharging, the temperature of discharging gas is lower than 150 ℃ to air through cooling air outlet 13 behind the preheating small particles material.By the action of by-pass valve control 21, two small-particle kiln storehouse 7 alternate runs.
Embodiment 2
Another embodiment of the present invention as shown in Figure 2, the limestone kiln is the sleeve kiln, is provided with the combustion chamber, goes up inner core 18, inner core 19 and firebridge 20 down.The combustion chamber is divided into upper and lower two-layer, and every layer is provided with 6 combustion chambers, and same layer combustion chamber evenly arranged, upper and lower layer combustion chamber staggered arrangement links to each other by firebridge between each combustion chamber and the inner core.Inner core and urceolus arranged concentric form an annular space, Wingdale preheating in annular space, calcining.Firebridge is that refractory brick is built the arch form structure that forms by laying bricks or stones, and the high-temperature flue gas that burning produces enters the Wingdale bed of material by the space under the arch form firebridge.The preheating zone preheating of limestone material in feeding device enters the kiln body is sintered into lime through calcining zone, falls into the cooling zone cooling then.The process of mixing, calcining and cooling off with the small-particle limestone material is identical with embodiment 1.
Embodiment 3
An embodiment more of the present invention as shown in Figure 3, the limestone kiln is the arch bridge kiln, the calcining zone of arch bridge kiln is provided with two-layer burning arch bridge 4, the upper strata is provided with 4 burning arch bridges, lower floor is provided with 3 burning arch bridges, two-layer burning arch bridge staggered arrangement.The bottom at the two ends of every burning arch bridge is provided with burner 15, and burner is two kinds of solid combustion device and gas burners, can be used alone burner, or use two kinds of burners simultaneously.The preheating zone is provided with 3 suction bars 2.Other structure is identical with embodiment 1 with operation scheme.

Claims (8)

1. combined type limestone kiln, comprise kiln body (3), apparatus for feeding, discharging equipment, Controlling System and exhaust emission system, be provided with preheating zone (11) in the described kiln body, calcining zone (12) and cooling zone (8), described preheating zone is provided with exhanst gas outlet or suction bar (2), exhanst gas outlet or suction bar are connected with exhaust emission system, cooling zone is provided with cooling air port (9), cooling air inlet is connected with cooling blower (16), it is characterized in that: described combined type limestone kiln also is provided with 2~4 small-particle kiln storehouses (7) and 2~4 airducts (6), described small-particle kiln storehouse is provided with small-particle hopper (5), cooling air inlet (14) and cooling air outlet (13), the bottom in small-particle kiln storehouse is communicated with cooling zone top; Described airduct is positioned at the outside of kiln body, and the entrance of airduct passes the middle part that the kiln wall inserts cooling zone (8), and the outlet of airduct is connected with cooling air inlet (14), and cooling air outlet (13) is connected with exhaust emission system.
2. combined type according to claim 1 limestone kiln, it is characterized in that: described limestone kiln is beam-type limekiln, sleeve kiln, arch bridge kiln, wheat Wurz kiln or Xinhua's wheat Wurz kiln.
3. combined type according to claim 2 limestone kiln, it is characterized in that: the top, preheating zone of described beam-type limekiln is provided with suction bar (2), and calcining zone is provided with 1~5 layer of burning beam (22), every layer of 1~5 burning beam; Described burning beam is provided with burner.
4. combined type according to claim 3 limestone kiln, it is characterized in that: described burning beam is provided with beam body cooling infrastructure, and described burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned burner.
5. combined type according to claim 2 limestone kiln, it is characterized in that: described sleeve kiln is provided with combustion chamber, last inner core (18), following inner core (19) and firebridge (20), described combustion chamber is divided into upper and lower two-layer, every layer is provided with 3~8 combustion chambers, same layer combustion chamber evenly arranged, link to each other by firebridge between the upper and lower layer combustion chamber staggered arrangement, each combustion chamber and inner core.
6. combined type according to claim 2 limestone kiln, it is characterized in that: the preheating zone of described arch bridge kiln is provided with suction bar (2), calcining zone is provided with 1~5 grate firing and burns arch bridge (4), 1~10 every layer burning arch bridge (4) and 2~20 burners (15), burner are positioned at the bottom at burning arch bridge two ends.
7. combined type according to claim 6 limestone kiln, it is characterized in that: described burning arch bridge (4) inside can be provided with the cavity of heat-eliminating medium circulation, described burner is gaseous fuel burners, liquid fuel burner or solid fuel burner, or the combination of said burner.
8. combined type according to claim 1 limestone kiln, it is characterized in that: exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
CN201210124833XA 2012-04-26 2012-04-26 Compound lime kiln Active CN102627418B (en)

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103542714B (en) * 2012-07-13 2016-08-03 蒋明学 Many large-scale shaft furnaces of wall partition type
CN104249239B (en) * 2013-06-28 2017-06-16 上海宝冶建设工业炉工程技术有限公司 The preparation method of sleeve lime kiln inner sleeve
CN109186273B (en) * 2018-12-05 2019-03-12 中冶长天国际工程有限责任公司 A kind of limekiln hybrid heating system and its control method
CN110590195A (en) * 2019-10-09 2019-12-20 新疆中泰矿冶有限公司 Method for increasing yield and efficiency of Maerz lime kiln

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149389C2 (en) * 1980-12-15 1986-01-02 Ishikawajima-Harima Jukogyo K.K.
KR20030087359A (en) * 2002-05-08 2003-11-14 주식회사 포스코 Device for manufacturing quick lime by screening limestone of rotary kiln
CN101585669A (en) * 2009-07-08 2009-11-25 贾会平 Converging type limekiln
CN201620107U (en) * 2009-07-21 2010-11-03 贾会平 Multi-hearth lime kiln

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2836162A1 (en) * 1978-08-18 1980-02-28 Kloeckner Humboldt Deutz Ag OVEN FOR HEAT TREATMENT FROM MOST PIECE TO FINE GRAIN

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3149389C2 (en) * 1980-12-15 1986-01-02 Ishikawajima-Harima Jukogyo K.K.
KR20030087359A (en) * 2002-05-08 2003-11-14 주식회사 포스코 Device for manufacturing quick lime by screening limestone of rotary kiln
CN101585669A (en) * 2009-07-08 2009-11-25 贾会平 Converging type limekiln
CN201620107U (en) * 2009-07-21 2010-11-03 贾会平 Multi-hearth lime kiln

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Address after: 051431 Hebei city of Shijiazhuang province Luancheng douyu town equipment manufacturing base of Xinhua Road No. 6 (douyu West Middle School)

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